WO2016127556A1 - 一种基站、用户终端及载波调度指示方法 - Google Patents

一种基站、用户终端及载波调度指示方法 Download PDF

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Publication number
WO2016127556A1
WO2016127556A1 PCT/CN2015/083526 CN2015083526W WO2016127556A1 WO 2016127556 A1 WO2016127556 A1 WO 2016127556A1 CN 2015083526 W CN2015083526 W CN 2015083526W WO 2016127556 A1 WO2016127556 A1 WO 2016127556A1
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Prior art keywords
carrier
code
base station
scheduled
cai field
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Ceased
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PCT/CN2015/083526
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English (en)
French (fr)
Inventor
唐浩
龚政委
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to RU2017131513A priority Critical patent/RU2681374C1/ru
Priority to EP20159235.9A priority patent/EP3742646B1/en
Priority to JP2017559747A priority patent/JP6526242B2/ja
Priority to EP22156941.1A priority patent/EP4068667B1/en
Priority to EP15881717.1A priority patent/EP3247065B1/en
Priority to KR1020177025234A priority patent/KR102008357B1/ko
Publication of WO2016127556A1 publication Critical patent/WO2016127556A1/zh
Priority to US15/673,285 priority patent/US10764003B2/en
Anticipated expiration legal-status Critical
Priority to US17/004,628 priority patent/US11483103B2/en
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0026—Transmission of channel quality indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex

Definitions

  • the present invention relates to the field of communications, and in particular, to a base station, a user terminal, and a carrier scheduling indication method.
  • the Third Generation Partnership Project (English: Third Generation Partnership Project, 3GPP) proposed carrier aggregation technology.
  • the carrier aggregation technique is to aggregate multiple consecutive or discontinuous carriers together to form a wider spectrum.
  • the base station is configured with multiple carriers, the data can be simultaneously transmitted to the user terminal (English: User Equipment, UE for short) through the configured multiple carriers.
  • the base station When the base station transmits data to the UE by using the scheduling carrier (the carrier used by the base station to transmit data) in the carrier (the carrier configured by the base station), the base station needs to send downlink control information to the UE through each scheduling carrier (English: Downlink Control Information, Abbreviation: DCI), indicating the physical resource block occupied by the UE itself on the scheduling carrier, the modulation coding mode used, and the like, so that the UE receives data according to the received DCI.
  • DCI Downlink Control Information
  • the base station may add a downlink allocation indication (English: Downlink Assignment Indication, DAI) 2 field to the DCI sent to the UE.
  • DAI Downlink Assignment Indication
  • the DAI2 field in the prior art must be able to indicate the scheduling of all configured carriers except the current scheduled carrier, the number of bits in the DAI2 field is numerically equal to the number of configured carriers of the base station. 1. In this way, when the number of configured carriers of the base station is large, the number of bits included in the DAI2 field is increased, so that the DCI is long, resulting in a large signaling overhead.
  • the present invention provides a base station, a user terminal, and a carrier scheduling indication method, which solves the problem that the signaling overhead is large due to the large number of configured carriers of the base station.
  • a first aspect of the present invention provides a base station, where the base station includes: a processing unit and a sending unit;
  • the processing unit is configured to generate a carrier allocation indication CAI field of the current scheduling carrier according to the configured scheduling situation of all configured carriers, where the CAI field is used to indicate the total number of scheduling carriers in the all configured carriers and the current scheduling
  • the cumulative index value M of the carrier the M represents the first one of the configuration carriers to the current scheduling carrier, and the current scheduling carrier is the Mth scheduled carrier; or the CAI field is used to indicate the location Describe the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier;
  • the sending unit configured to: send the CAI field generated by the processing unit to the user terminal UE by using the current scheduling carrier in the downlink control information DCI;
  • M is an integer greater than or equal to 1.
  • the processing unit is specifically configured to acquire the total number of the scheduled carriers, and obtain the M; obtain the first code according to the total number of the scheduled carriers and the preset first mapping relationship, and according to the M and the pre- a second mapping relationship, obtaining a second encoding; combining the first encoding and the second encoding to generate the CAI field;
  • the first mapping relationship is used to indicate the total number of the scheduled carriers.
  • the first coding, the second mapping relationship is used to indicate the second coding corresponding to the M.
  • the number of bits of the first encoding is The number of bits of the second encoding is
  • N is the total number of all the configured carriers; Indicates the value obtained by rounding up log 2 N.
  • the processing unit is further configured to: acquire the first code according to the total number of the scheduled carriers and the preset first mapping relationship, and obtain the second code according to the M and the preset second mapping relationship; Before, judge Whether it is greater than 2;
  • the processing unit is specifically used when When the value is not greater than 2, the first code is obtained according to the total number of the scheduled carriers and the first mapping relationship, and the second code is obtained according to the M and the second mapping relationship.
  • the processing unit is also used when If the value is greater than 2, the first code is obtained according to the total number of the scheduled carriers and the first mapping relationship, and the third code is obtained according to the M and the preset third mapping relationship; Encoding and the third encoding combination to generate the CAI field;
  • the third mapping relationship is used to indicate the third encoding corresponding to the M, where the number of bits of the third encoding is smaller than the number of bits of the second encoding.
  • the first code is located before the CAI field a bit, the second code being located after the CAI field Bits
  • the first code is located after the CAI field a bit, the second code being located before the CAI field Bits.
  • the number of bits in the CAI field is The a is greater than or equal to 2 and less than Integer
  • the first code is located before the CAI field a bit, the third code being located after the last a bit of the CAI field;
  • the first code is located after the CAI field a bit, the third code being located in the first a bit of the CAI field.
  • the processing unit is specifically configured to acquire a number of a previous scheduling carrier of the current scheduling carrier and a number of a subsequent scheduling carrier; according to the number of the previous scheduling carrier, the number and preset of the next scheduled carrier
  • the fourth mapping relationship generates the CAI field.
  • the fourth mapping relationship is used to indicate a fourth encoding corresponding to the number of the previous scheduling carrier, and the subsequent scheduling The fifth code corresponding to the carrier number;
  • the processing unit is configured to acquire the fourth code according to the number of the previous scheduling carrier and the fourth mapping relationship, and according to the number of the next scheduling carrier and the fourth mapping relationship, Obtaining the fifth code; combining the fourth code and the fifth code to generate the CAI field.
  • the fourth mapping relationship is used to indicate that the number of the previous scheduling carrier and the number of the subsequent scheduling carrier are jointly encoded. a corresponding sixth encoding; the number of bits of the sixth encoding is smaller than a sum of the number of bits of the fourth encoding and the fifth encoding;
  • the processing unit is specifically configured to use, according to the number and location of the previous scheduled carrier The number of the next scheduling carrier and the fourth mapping relationship are obtained, and the sixth encoding is obtained, and the sixth encoding is used as the CAI field.
  • the number of bits in the CAI field is
  • the fourth code is located before the CAI field a bit, the fifth code being located after the CAI field Bits
  • the fourth code is located after the CAI field a bit, the fifth code being located before the CAI field Bits.
  • the number of bits in the CAI field is
  • a second aspect of the present invention provides a user terminal UE, where the UE includes: a receiving unit and a processing unit;
  • the receiving unit is configured to receive downlink control information DCI that carries a carrier allocation indication CAI field sent by the base station by using the at least one current scheduling carrier, where the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station.
  • the cumulative index value M of the current scheduling carrier where the M indicates the first one of the configured carriers to the current scheduling carrier, and the current scheduling carrier is the Mth scheduled carrier; or the CAI field a number indicating a previous scheduling carrier of the current scheduling carrier and a number of a subsequent scheduling carrier;
  • the processing unit is configured to acquire the CAI field in the DCI received by the receiving unit, so as to learn the scheduling situation of all the configured carriers.
  • the UE further includes: a sending unit;
  • the sending unit is configured to send hybrid automatic retransmission HARQ information to the base station after the processing unit acquires the CAI field in the DCI;
  • the HARQ information is used to feedback whether the data sent by the base station through all the scheduling carriers is correctly received, and the number of bits of the HARQ information is equal to whether the data sent on each of the scheduling carriers is correctly received. The sum of the number of bits.
  • the CAI field includes a first code and a second code, where the first code is a code obtained by the base station according to the total number of the scheduled carriers and a preset first mapping relationship, where the first mapping relationship is used to indicate The first code corresponding to the total number of the scheduled carriers, the second code is a code obtained by the base station according to the M and a preset second mapping relationship, where the second mapping relationship is used to indicate the The second code corresponding to M;
  • the CAI field includes the first coding and the third coding, where the third coding is an encoding obtained by the base station according to the M and a preset third mapping relationship, where the third mapping relationship is used. And indicating the third code corresponding to the M; wherein the number of bits of the third code is smaller than the number of bits of the second code.
  • the CAI field includes a fourth code and a fifth code;
  • the fourth code is a code obtained by the base station according to a number of the previous scheduling carrier and a preset fourth mapping relationship, where the fifth code is And the encoding obtained by the base station according to the number of the next scheduling carrier and the fourth mapping relationship, where the fourth mapping relationship is used to indicate the fourth encoding corresponding to the number of the previous scheduling carrier, and the The fifth code corresponding to the number of the next scheduled carrier;
  • the sixth coding is a code obtained by the base station according to the number of the previous scheduling carrier, the number of the next scheduled carrier, and a preset fourth mapping relationship.
  • the fourth mapping relationship is used to indicate the number of the previous scheduling carrier, and the sixth encoding corresponding to the number of the next scheduled carrier after joint coding.
  • the processing unit is further configured to determine the scheduling carrier according to the CAI field a total number, and determining a cumulative index value M of the at least one current scheduled carrier;
  • the sending unit is specifically configured to send the HARQ information to the base station according to the total number of the scheduled carriers determined by the processing unit and the cumulative index value M of the at least one current scheduled carrier.
  • the processing unit is further configured to determine, according to the CAI field, a number of a previous scheduling carrier of the at least one current scheduling carrier and a number of a subsequent scheduling carrier, and according to a previous scheduling of the at least one current scheduling carrier The number of the carrier and the number of the next scheduled carrier determine the total number of scheduled carriers;
  • the sending unit is configured to send, according to the total number of the scheduled carriers determined by the processing unit, a number of a previous scheduling carrier of the at least one current scheduling carrier, and a number of a subsequent scheduling carrier, to the base station.
  • the HARQ information is configured to send, according to the total number of the scheduled carriers determined by the processing unit, a number of a previous scheduling carrier of the at least one current scheduling carrier, and a number of a subsequent scheduling carrier, to the base station.
  • the processing unit is configured to acquire, according to the first mapping relationship and the first encoding, a total number of the scheduling carriers, and according to the second mapping relationship and the second encoding, for the CAI field. , get the M.
  • the processing unit is configured to acquire, according to the first mapping relationship and the first encoding, a total number of the scheduling carriers, and according to the third mapping relationship and the third encoding, for the CAI field. , get the M.
  • the processing unit is configured to acquire, according to the fourth coding and the fourth mapping relationship, a number of the previous scheduling carrier according to the CAI field, and according to the fifth coding and the fourth Mapping the relationship and obtaining the number of the next scheduled carrier.
  • the processing unit is configured to acquire, for the CAI field, a number of the previous scheduling carrier and a number of the subsequent scheduling carrier according to the sixth encoding and the fourth mapping relationship.
  • a third aspect of the present invention provides a carrier scheduling indication method, where the method includes:
  • the base station generates a carrier allocation indication CAI field of the current scheduling carrier according to the scheduling situation of all configured carriers configured by the base station, where the CAI field is used to indicate the total number of scheduling carriers in all the configured carriers and the cumulative index value of the current scheduling carrier.
  • M the M indicates that the current scheduled carrier is the Mth scheduled carrier, and the current scheduling carrier is the Mth scheduled carrier; or the CAI field is used to indicate the current scheduled carrier. The number of the previous scheduled carrier and the number of the next scheduled carrier;
  • the base station carries the CAI field in the downlink control information DCI and sends the data to the user terminal UE through the current scheduling carrier;
  • M is an integer greater than or equal to 1.
  • the base station when the CAI field is used to indicate the total number of scheduled carriers in all the configured carriers and the cumulative index value M of the current scheduled carrier, the base station generates a carrier allocation indication CAI field of the current scheduling carrier according to the scheduling situation of all configured carriers configured by the base station, including:
  • the base station acquires the total number of the scheduled carriers, and acquires the M;
  • the base station Obtaining, by the base station, the first code according to the total number of the scheduled carriers and the preset first mapping relationship, and acquiring the second code according to the M and the preset second mapping relationship; wherein the first mapping The relationship is used to indicate the first code corresponding to the total number of the scheduled carriers, and the second mapping relationship is used to indicate the second code corresponding to the M;
  • the base station combines the first code and the second code to generate the CAI field.
  • the number of bits of the first encoding is The number of bits of the second encoding is
  • N is the total number of all the configured carriers; Indicates the value obtained by rounding up log 2 N.
  • the base station acquires a first code according to the total number of the scheduled carriers and a preset first mapping relationship, and according to the foregoing
  • the second mapping relationship between the M and the preset, before acquiring the second encoding further includes:
  • the base station judges Whether it is greater than 2;
  • the base station acquires the first code according to the total number of the scheduled carriers and the first mapping relationship, and acquires the second code according to the M and the second mapping relationship.
  • the method further includes:
  • the base station when When the value is greater than 2, acquires the first code according to the total number of the scheduled carriers and the first mapping relationship, and acquires a third code according to the M and the preset third mapping relationship;
  • the third mapping relationship is used to indicate the third encoding corresponding to the M, where the number of bits of the third encoding is smaller than the number of bits of the second encoding;
  • the base station combines the first code and the third code to generate the CAI field.
  • the first code is located before the CAI field a bit, the second code being located after the CAI field Bits
  • the first code is located after the CAI field a bit, the second code being located before the CAI field Bits.
  • the number of bits in the CAI field is The a is greater than or equal to 2 and less than Integer
  • the first code is located before the CAI field a bit, the third code being located after the last a bit of the CAI field;
  • the first code is located after the CAI field a bit, the third code being located in the first a bit of the CAI field.
  • the base station when the CAI field is used to indicate a number of a previous scheduling carrier of the current scheduling carrier and a number of a subsequent scheduling carrier, the base station generates a carrier allocation indication CAI field of the current scheduling carrier according to the scheduling situation of all configured carriers configured by the base station, including:
  • the base station generates the CAI field according to the number of the previous scheduling carrier, the number of the next scheduling carrier, and a preset fourth mapping relationship.
  • the fourth mapping relationship is used to indicate a fourth encoding corresponding to the number of the previous scheduling carrier, and the subsequent scheduling The fifth code corresponding to the carrier number;
  • the base station combines the fourth code and the fifth code to generate the CAI field.
  • the fourth mapping relationship is used to indicate the number and location of the previous scheduling carrier. Determining, by the number of the next scheduling carrier, a sixth encoding corresponding to the joint encoding; the number of bits of the sixth encoding is smaller than a sum of the number of bits of the fourth encoding and the fifth encoding;
  • the base station uses the sixth code as the CAI field.
  • the number of bits in the CAI field is
  • the fourth code is located before the CAI field a bit, the fifth code being located after the CAI field Bits
  • the fourth code is located after the CAI field a bit, the fifth code being located before the CAI field Bits.
  • the number of bits in the CAI field is
  • a fourth aspect of the present invention provides a carrier scheduling indication method, including:
  • the user terminal UE receives the downlink control information DCI carrying the carrier allocation indication CAI field sent by the base station through the at least one current scheduling carrier;
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station, and the current scheduling
  • the cumulative index value M of the carrier the M represents the first one of the configuration carriers to the current scheduling carrier, and the current scheduling carrier is the Mth scheduled carrier; or the CAI field is used to indicate the location Describe the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier;
  • the UE acquires the CAI field in the DCI to learn the scheduling situation of all the configured carriers.
  • the method further includes:
  • the HARQ information is used to feedback whether the data sent by the base station through all the scheduling carriers is correctly received, and the number of bits of the HARQ information is equal to whether the data sent on each of the scheduling carriers is correctly received. The sum of the number of bits.
  • the CAI field includes a first code and a second code, where the first code is a code obtained by the base station according to the total number of the scheduled carriers and a preset first mapping relationship, where the first mapping relationship is used to indicate The first code corresponding to the total number of the scheduled carriers, the second code is a code obtained by the base station according to the M and a preset second mapping relationship, where the second mapping relationship is used to indicate the The second code corresponding to M;
  • the CAI field includes the first coding and the third coding, where the third coding is an encoding obtained by the base station according to the M and a preset third mapping relationship, where the third mapping relationship is used. And indicating the third code corresponding to the M; wherein the number of bits of the third code is smaller than the number of bits of the second code.
  • the CAI field includes a fourth code and a fifth code;
  • the fourth code is a code obtained by the base station according to a number of the previous scheduling carrier and a preset fourth mapping relationship, where the fifth code is And the encoding obtained by the base station according to the number of the next scheduling carrier and the fourth mapping relationship, where the fourth mapping relationship is used to indicate the fourth encoding corresponding to the number of the previous scheduling carrier, and the The fifth code corresponding to the number of the next scheduled carrier;
  • the sixth coding is a code obtained by the base station according to the number of the previous scheduling carrier, the number of the next scheduled carrier, and a preset fourth mapping relationship.
  • the fourth mapping relationship is used to indicate the number of the previous scheduling carrier, and the sixth encoding corresponding to the number of the next scheduled carrier after joint coding.
  • the sending, by the UE, the hybrid automatic retransmission HARQ information to the base station includes:
  • the UE sends the HARQ information to the base station according to the total number of the scheduled carriers and the cumulative index value M of the at least one current scheduled carrier.
  • the sending, by the UE, the hybrid automatic retransmission HARQ information to the base station includes:
  • the UE sends the HARQ information to the base station according to the total number of the scheduled carriers and the number of the previous scheduling carrier of the at least one current scheduling carrier and the number of the next scheduling carrier.
  • the UE determines according to the CAI field.
  • the total number of the scheduled carriers, and the cumulative index value M of the at least one current scheduled carrier including:
  • the UE acquires the total number of the scheduled carriers according to the first mapping relationship and the first encoding, and acquires the M according to the second mapping relationship and the second encoding. .
  • the UE determines according to the CAI field.
  • the total number of the scheduled carriers, and the cumulative index value M of the at least one current scheduled carrier including:
  • the UE acquires the total number of the scheduling carriers according to the first mapping relationship and the first encoding, and acquires the M according to the third mapping relationship and the third encoding. .
  • the UE determines according to the CAI field.
  • the number of the previous scheduling carrier of the at least one current scheduling carrier and the number of the subsequent scheduling carrier including:
  • the UE acquires the number of the previous scheduling carrier according to the fourth coding and the fourth mapping relationship, and obtains the location according to the fifth coding and the fourth mapping relationship. The number of the next scheduled carrier.
  • the UE determines the at least one current scheduling according to the CAI field.
  • the number of the previous scheduled carrier of the carrier and the number of the next scheduled carrier including:
  • the UE acquires the number of the previous scheduling carrier and the number of the subsequent scheduling carrier according to the sixth coding and the fourth mapping relationship.
  • the base station, the user terminal, and the carrier scheduling indication method provided by the embodiment of the present invention after the base station generates the CAI field of the current scheduling carrier according to the scheduling situation of all configured carriers configured by the base station, the generated CAI field is carried in the DCI through the current scheduled carrier.
  • the CAI field used by the base station to send a carrier scheduling indication to the UE indicates the total number of all scheduled carriers and the cumulative index value of the current scheduled carrier, or indicates the previous scheduled carrier of the current scheduled carrier.
  • the number and the number of the next scheduled carrier, that is, the CAI field in the present invention indicates the scheduling information of the scheduling carrier, and in the prior art, the DAI2 field indication for the carrier scheduling indication sent by the base station to the UE is indicated.
  • FIG. 1 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a UE according to another embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of another UE according to another embodiment of the present invention.
  • FIG. 4 is a flowchart of a method for indicating a carrier scheduling according to another embodiment of the present invention.
  • FIG. 5 is a flowchart of a carrier scheduling indication method according to another embodiment of the present invention.
  • FIG. 6 is a flowchart of a carrier scheduling indication method according to another embodiment of the present invention.
  • FIG. 7 is a flowchart of another carrier scheduling indication method according to another embodiment of the present invention.
  • FIG. 8 is a flowchart of another carrier scheduling indication method according to another embodiment of the present invention.
  • FIG. 9 is a flowchart of another carrier scheduling indication method according to another embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a base station according to another embodiment of the present invention.
  • FIG. 11 is a schematic structural diagram of a UE according to another embodiment of the present invention.
  • system and “network” are often used interchangeably herein. use.
  • An embodiment of the present invention provides a base station. As shown in FIG. 1, the base station includes: a processing unit 11 and a sending unit 12.
  • the processing unit 11 is configured to generate a carrier allocation indication (English: Carrier Assignment Indication, CAI) field of the current scheduling carrier according to the configured scheduling condition of all configured carriers.
  • a carrier allocation indication English: Carrier Assignment Indication, CAI
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the current scheduled carrier, where M represents the first configured carrier to the current scheduled carrier, and the current scheduled carrier is the Mth scheduled carrier; Alternatively, the CAI field is used to indicate the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier.
  • the sending unit 12 is configured to carry the CAI field generated by the processing unit 11 in the DCI and send the UE to the UE by using the current scheduling carrier.
  • M is an integer greater than or equal to 1.
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the current scheduled carrier
  • the processing unit 11 is configured to acquire the total number of the scheduled carriers, and obtain the M.
  • the first code is obtained according to the total number of the scheduled carriers and the preset first mapping relationship, and according to the M and the preset second mapping. Relationship, obtaining a second encoding; combining the first encoding and the second encoding to generate a CAI field.
  • the first mapping relationship is used to indicate the first code corresponding to the total number of the scheduled carriers, and the second mapping relationship is used to indicate the second code corresponding to the M.
  • the number of bits of the first code and the second code is
  • N is the total number of all the configured carriers; Indicates the value obtained by rounding up log 2 N.
  • the processing unit 11 is further configured to acquire the first code according to the total number of the scheduled carriers and the preset first mapping relationship, and according to the M and the preset second Mapping relationship, before obtaining the second code, judging Whether it is greater than 2.
  • Processing unit 11 specifically for when When the value is not greater than 2, the first code is obtained according to the total number of the scheduled carriers and the first mapping relationship, and the second code is obtained according to the M and the second mapping relationship.
  • the processing unit 11 is further configured to be used when When the value is greater than 2, the first code is obtained according to the total number of the scheduled carriers and the first mapping relationship, and the third code is obtained according to the M and the preset third mapping relationship; combining the first code and the third code Generate a CAI field.
  • the third mapping relationship is used to indicate the third encoding corresponding to the M, where the number of bits of the third encoding is smaller than the number of bits of the second encoding.
  • the number of bits of the CAI field is
  • the second code is located after the CAI field Bits, or, the first code is located after the CAI field Bits, the second code is in front of the CAI field Bits.
  • the number of bits of the CAI field is
  • the first code is located before the CAI field a bit, the third code is located after the last bit of the CAI field, or the first code is located after the CAI field The first bit, the third code is located in the first a bit of the CAI field.
  • the CAI field is used to indicate the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier
  • the processing unit 11 is configured to obtain a number of a previous scheduling carrier of the current scheduling carrier and a number of a subsequent scheduling carrier, and generate a number according to a previous scheduling carrier number, a subsequent scheduling carrier number, and a preset fourth mapping relationship. CAI field.
  • the fourth mapping relationship is used to indicate a fourth encoding corresponding to the number of the previous scheduling carrier, and the latter scheduling The number of the wave corresponds to the fifth code.
  • the processing unit 11 is configured to acquire the fourth code according to the number of the previous scheduling carrier and the fourth mapping relationship, and obtain the foregoing according to the number of the next scheduled carrier and the fourth mapping relationship. a fifth encoding; combining the fourth encoding and the fifth encoding to generate the CAI field.
  • the fourth mapping relationship is used to indicate the number of the previous scheduling carrier, and the sixth encoding corresponding to the number of the subsequent scheduling carrier after the joint encoding;
  • the number of coded bits is less than the sum of the number of bits of the fourth code and the fifth code.
  • the processing unit 11 is configured to acquire the sixth code according to the number of the previous scheduling carrier, the number of the next scheduling carrier, and the fourth mapping relationship, and use the sixth encoding as the CAI field.
  • the number of bits of the CAI field is
  • the fifth code is located after the CAI field Bits; or, the fourth code is located after the CAI field Bits, the fifth code is in front of the CAI field Bits.
  • the number of bits in the CAI field may be For the sixth coding specific coding mode, refer to the embodiment of the present invention described in FIG. 9 below.
  • the base station provided by the embodiment of the present invention after generating the CAI field of the current scheduling carrier according to the scheduling situation of all configured carriers configured by itself, carries the generated CAI field in the DCI and sends the CAI field to the UE through the current scheduling carrier.
  • the CAI field used by the base station to send a carrier scheduling indication to the UE indicates the total number of all scheduled carriers and the cumulative index value of the current scheduled carrier, or indicates the previous scheduled carrier of the current scheduled carrier.
  • the CAI field in the invention indicates scheduling information of the scheduling carrier, and in the prior art, the DAI2 field used by the base station to perform the carrier scheduling indication to the UE indicates that each of all the configured carriers except the current scheduled carrier
  • the scheduling of the carrier is configured, and the total number of the scheduled carriers of the base station is less than or equal to the total number of the configured carriers of the base station. Therefore, when the number of carriers configured by the base station is larger, the base station is provided according to the embodiment of the present invention.
  • the CAI field generated by the method contains fewer bits, which reduces the length of the DCI field and reduces the signaling overhead.
  • the UE may include: a receiving unit 21 and a processing unit 22.
  • the receiving unit 21 is configured to receive downlink control information DCI that carries the carrier allocation indication CAI field sent by the base station by using the at least one current scheduling carrier.
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the current scheduled carrier, where M represents the first configured carrier to the current scheduled carrier, and the current scheduled carrier is the Mth scheduled. Or the CAI field is used to indicate the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier.
  • the processing unit 22 is configured to acquire the CAI field in the DCI received by the receiving unit 21, so as to learn the scheduling situation of all the configured carriers.
  • the UE may further include: a sending unit 23.
  • the sending unit 23 is configured to send hybrid automatic retransmission HARQ information to the base station after the processing unit 22 acquires the CAI field in the DCI.
  • the HARQ information is used to feedback whether the data sent by the base station through all the scheduling carriers is correctly received, and the number of bits of the HARQ information is equal to whether the data sent on each of the scheduling carriers is correctly received. The sum of the number of bits.
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the current scheduled carrier
  • the CAI field includes a first code and a second code
  • the first code is a code obtained by the base station according to the total number of the scheduled carriers and a preset first mapping relationship, where the first mapping relationship is used to indicate the first code corresponding to the total number of the scheduled carriers.
  • the second code is a code obtained by the base station according to the M and a preset second mapping relationship, where the second mapping relationship is used to indicate the second code corresponding to the M.
  • the CAI field includes a first code and a third code, where the third code is a code obtained by the base station according to the M and a preset third mapping relationship, where the third The mapping relationship is used to indicate the third encoding corresponding to the M.
  • the number of bits of the third encoding is smaller than the number of bits of the second encoding.
  • the CAI field is used to indicate the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier
  • the CAI field includes a fourth encoding and a fifth encoding, where the fourth encoding is an encoding obtained by the base station according to the number of the previous scheduling carrier and a preset fourth mapping relationship.
  • the fifth code is a code obtained by the base station according to the number of the next scheduled carrier and the fourth mapping relationship, where the fourth mapping relationship is used to indicate the number corresponding to the number of the previous scheduling carrier. a fourth code, and the fifth code corresponding to the number of the next scheduled carrier.
  • the CAI field is a sixth code
  • the sixth code is a number of the previous scheduling carrier, a number of the next scheduled carrier, and a preset fourth according to the base station.
  • the processing unit 22 is further configured to determine, according to the CAI field, a total number of the scheduled carriers, and determine an accumulated index value M of the at least one current scheduled carrier.
  • the sending unit 23 is specifically configured to send the HARQ information to the base station according to the total number of scheduling carriers determined by the processing unit 22 and the cumulative index value M of the at least one current scheduling carrier.
  • the processing unit 22 is further configured to perform according to the a CAI field, determining a number of a previous scheduling carrier of the at least one current scheduling carrier and a number of a subsequent scheduling carrier, and according to a number of a previous scheduling carrier of the at least one current scheduling carrier and a number of a subsequent scheduling carrier, Determine the total number of scheduled carriers.
  • the sending unit 23 is configured to send the HARQ information to the base station according to the total number of scheduling carriers determined by the processing unit 22 and the number of the previous scheduling carrier of the at least one current scheduling carrier and the number of the next scheduling carrier.
  • the CAI field includes the first code and the second code
  • the processing unit 22 is configured to acquire, according to the first mapping relationship and the first encoding, a total number of scheduling carriers according to the first mapping relationship, and acquire M according to the second mapping relationship and the second encoding.
  • the CAI field includes the first code and the third code
  • the processing unit 22 is configured to acquire, according to the first mapping relationship and the first encoding, a total number of scheduling carriers according to the first mapping relationship, and acquire M according to the third mapping relationship and the third encoding.
  • the CAI field includes the fourth encoding and the fifth encoding
  • the processing unit 22 is configured to acquire the number of the previous scheduling carrier according to the fourth encoding and the fourth mapping relationship, and obtain the location according to the fifth encoding and the fourth mapping relationship, for the CAI field. The number of the next scheduled carrier.
  • the processing unit 22 is specifically configured to obtain, for the CAI field, a number of a previous scheduling carrier and a number of a subsequent scheduling carrier according to the sixth encoding and the fourth mapping relationship.
  • the UE provided by the embodiment of the present invention receives the base station through at least one current scheduled carrier.
  • the DCI carrying the CAI field is sent, and the CAI field in the DCI is obtained, so as to know the scheduling of all configured carriers.
  • the CAI field received by the UE indicates the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value of the current scheduled carrier, or indicates the number of the previous scheduled carrier of the current scheduled carrier.
  • the number of the next scheduled carrier indicates the scheduling information of the scheduling carrier, and in the prior art, the DAI2 field used by the base station to send the carrier scheduling indication to the UE indicates The scheduling condition of each configured carrier except all the currently configured carriers, and since the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, the carrier configured by the base station is compared with the prior art.
  • the number is large, the number of bits included in the CAI field generated by the method provided by the base station according to the embodiment of the present invention is small, so that the field length of the DCI is reduced, thereby reducing the signaling overhead.
  • the UE may determine the number of bits of the HARQ information that is sent to the base station according to the total number of the scheduled carriers of the base station, because the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, Compared with the number of bits of the HARQ information sent by the UE to the base station according to the total number of all configured carriers, the number of bits of the HARQ information is reduced, thereby reducing the signaling overhead.
  • Another embodiment of the present invention provides a carrier scheduling indication method. As shown in FIG. 4, the method may include:
  • the base station generates a CAI field of the current scheduling carrier according to the scheduling situation of all configured carriers configured by the base station.
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the current scheduled carrier, where M represents the first configured carrier to the current scheduled carrier, where the current The scheduling carrier is the Mth scheduled carrier, and M is an integer greater than or equal to 1.
  • M represents the first configured carrier to the current scheduled carrier
  • M is an integer greater than or equal to 1.
  • the cumulative index value of the current scheduled carrier is 5, it indicates that starting from the first configured carrier, the current scheduled carrier is the fifth scheduled carrier.
  • the CAI field is used to indicate the current scheduled carrier. The number of the previous scheduled carrier and the number of the next scheduled carrier.
  • the base station carries the CAI field in the DCI and sends the UE to the UE by using the current scheduling carrier.
  • the base station After the base station generates the CAI field of the current scheduling carrier according to the scheduling situation of all the configured carriers configured by the base station, the base station carries the generated CAI field in the DCI, and sends the CAI field to the UE through the current scheduling carrier.
  • the carrier scheduling indication method In the carrier scheduling indication method provided by the embodiment of the present invention, after the base station generates the CAI field of the current scheduling carrier according to the scheduling situation of all the configured carriers configured by the base station, the generated CAI field is carried in the DCI and sent to the UE by using the current scheduling carrier.
  • the CAI field used by the base station to send a carrier scheduling indication to the UE indicates the total number of all scheduled carriers and the cumulative index value of the current scheduled carrier, or indicates the previous scheduled carrier of the current scheduled carrier.
  • the number and the number of the next scheduled carrier, that is, the CAI field in the present invention indicates the scheduling information of the scheduling carrier, and in the prior art, the DAI2 field indication for the carrier scheduling indication sent by the base station to the UE is indicated.
  • the CAI field of the current scheduling carrier generated by the base station is used to indicate the total number of scheduling carriers in all the configured carriers and the cumulative index value M of the current scheduling carrier
  • the CAI The specific generation process of the field is (ie, S301 may be specifically): the base station acquires the total number of scheduled carriers in all configured carriers, and obtains the cumulative index value M of the current scheduled carrier, according to the total number of scheduled carriers and the preset first mapping relationship. Obtaining a first code, and acquiring a second code according to the cumulative index M of the current scheduled carrier and the preset second mapping relationship, and then combining the first code and the second code to generate a CAI field.
  • the first mapping relationship is used to indicate a first encoding corresponding to the total number of scheduling carriers
  • the second mapping relationship is used to indicate that the current scheduling The second code corresponding to the cumulative index M of the waves.
  • the first encoding may be obtained by binary coding the total number of scheduling carriers in all configured carriers.
  • the second encoding may be obtained by binary encoding the cumulative index value M of the current scheduling carrier.
  • the number of bits of the CAI field generated by the base station according to the first coding and the second coding combination is N is the total number of all configured carriers. Indicates the value obtained by rounding up log 2 N.
  • the first code acquired by the base station is located before the CAI field. Bits, the second code obtained is located after the CAI field Bits, in another possible implementation, the first code acquired by the base station is located after the CAI field Bits, the second code obtained is located before the CAI field Bits.
  • the base station may first determine Whether it is greater than 2, if the base station determines If the total number of the scheduled carriers in all the configured carriers is obtained, and the total index value M of the current scheduled carrier is obtained, the base station obtains the first code according to the total number of the scheduled carriers and the preset first mapping relationship, and Obtaining a second encoding according to the cumulative index M of the current scheduled carrier and the preset second mapping relationship, and then combining the first encoding with the second encoding to generate a CAI field; if the base station determines After being greater than 2, the base station obtains the total number of scheduled carriers in all the configured carriers and obtains the cumulative index value M of the
  • the number of bits of the CAI field generated by the base station according to the first coding and the third coding combination is a is greater than or equal to 2 and less than The integer.
  • the number of bits in the CAI field may be
  • the first code acquired by the base station is located before the CAI field.
  • the first bit obtained is located in the last a bit of the CAI field.
  • the first code acquired by the base station is located after the CAI field.
  • the first bit obtained is located in the first a bit of the CAI field.
  • the third coding specific coding mode refer to the embodiment of the present invention described in FIG. 7 below.
  • the specific generation process of the CAI field that is, the S301 may be specifically: the base station Obtaining the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier, and then generating a CAI field according to the number of the previous scheduled carrier, the number of the next scheduled carrier, and the preset fourth mapping relationship.
  • the fourth mapping relationship is used to indicate a fourth encoding corresponding to the number of the previous scheduling carrier, and a fifth encoding corresponding to the number of the subsequent scheduling carrier. That is, the base station can independently encode the number of the previous scheduling carrier and the number of the next scheduling carrier to obtain the CAI field of the current scheduling carrier, so that the base station according to the number of the previous scheduling carrier, the number of the next scheduled carrier, and the pre-
  • the fourth mapping relationship is set, and the specific process of generating the CAI field may be: the base station acquires the fourth coding according to the number of the previous scheduling carrier and the fourth mapping relationship, and obtains the fourth coding according to the number and the fourth mapping relationship of the next scheduled carrier.
  • the fifth code is then combined to obtain the fourth code and the fifth code to generate a CAI field.
  • the fourth coding may be obtained by binary coding the number of the previous scheduling carrier.
  • the fifth coding may be obtained by binary coding the number of the subsequent scheduling carrier.
  • the number of bits in the CAI field may be In a possible implementation manner, the fourth code acquired by the base station is located before the CAI field. Bits, the fifth code is located after the CAI field Bits. In another possible implementation manner, the fourth code acquired by the base station is located after the CAI field. Bits, the fifth code is in front of the CAI field Bits.
  • the fourth mapping relationship is used to indicate the number of the previous scheduled carrier.
  • the number of the next scheduled carrier is jointly encoded and corresponding to the sixth code; the number of bits of the sixth code is smaller than the sum of the number of bits of the fourth code and the fifth code.
  • the base station can jointly encode the number of the previous scheduling carrier and the number of the next scheduling carrier to obtain the CAI field of the current scheduling carrier, so that the base station according to the number of the previous scheduling carrier, the number of the next scheduled carrier, and the pre-
  • the specific mapping process of generating the CAI field may be: the base station acquires the sixth coding according to the number of the previous scheduling carrier, the number of the next scheduling carrier, and the fourth mapping relationship, and uses the sixth coding as the CAI field. .
  • the number of bits in the CAI field may be For the sixth coding specific coding mode, refer to the embodiment of the present invention described in FIG. 9 below.
  • a method for indicating a carrier scheduling indication according to another embodiment of the present invention is as shown in FIG. 5.
  • the method may include:
  • the UE receives a DCI carrying a CAI field sent by the base station by using at least one current scheduling carrier.
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the current scheduled carrier, where M represents the first configured carrier to the current scheduled carrier.
  • the current scheduled carrier is the Mth scheduled carrier, and M is an integer greater than or equal to 1.
  • the CAI field is used to indicate the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier.
  • the UE acquires a CAI field in the DCI to learn the scheduling status of all configured carriers.
  • the UE may obtain the CAI field in all received DCIs to obtain the scheduling situation of all configured carriers configured by the base station.
  • the UE receives the DCI carrying the CAI field sent by the base station through at least one current scheduling carrier, and acquires the CAI in the DCI. Field to know the scheduling of all configured carriers.
  • the CAI field received by the UE indicates the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value of the current scheduled carrier, or indicates the number of the previous scheduled carrier of the current scheduled carrier.
  • the number of the next scheduled carrier indicates the scheduling information of the scheduling carrier, and in the prior art, the DAI2 field used by the base station to send the carrier scheduling indication to the UE indicates The scheduling condition of each configured carrier except all the currently configured carriers, and since the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, the carrier configured by the base station is compared with the prior art.
  • the number is large, the number of bits included in the CAI field generated by the method provided by the base station according to the embodiment of the present invention is small, so that the field length of the DCI is reduced, thereby reducing the signaling overhead.
  • the UE After the UE acquires the CAI field in the DCI and learns the scheduling situation of all configured carriers, the UE can receive data according to the CAI field in the DCI. In order to ensure the reliability of the data transmission, the UE may send the HARQ information to the base station to feedback whether it correctly receives the data sent by the base station through all the scheduling carriers. Therefore, after performing S402, the UE acquires the CAI in the DCI. After the field, the UE may send HARQ information to the base station.
  • the HARQ information is used to feedback whether the data transmitted by the base station through all the scheduling carriers is correctly received.
  • the number of bits of the HARQ information is equal to the sum of the number of bits required to feed back whether the data transmitted on each scheduling carrier is correctly received.
  • the CAI field carried in the DCI received by the UE in the S401 is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the current scheduled carrier, in the first possible implementation manner,
  • the CAI field carried in the DCI received by the UE includes a first code and a second code.
  • the first code is a code obtained by the base station according to the total number of the scheduled carriers and the preset first mapping relationship, where the first mapping relationship is used to indicate the first code corresponding to the total number of scheduled carriers, and the second code is used by the base station according to the M and the pre-coding.
  • the encoding obtained by the second mapping relationship is used, and the second mapping relationship is used to indicate the second encoding corresponding to M.
  • the first code may be the total number of scheduled carriers in all configured carriers.
  • the second code may be obtained by binary coding the cumulative index value M of the current scheduled carrier.
  • the CAI field carried in the DCI received by the UE includes a first code and a third code.
  • the first code is a code obtained by the base station according to the total number of the scheduled carriers and the preset first mapping relationship.
  • the first mapping relationship is used to indicate the first code corresponding to the total number of the scheduled carriers
  • the third code is the base station according to the M and the pre-
  • the third mapping relationship is used to indicate the third encoding corresponding to M, wherein the third encoded number of bits is smaller than the second encoded number of bits.
  • the CAI field carried in the DCI received by the UE in the S401 is used to indicate the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier, in the first possible implementation manner, the UE receives
  • the CAI field carried in the DCI includes a fourth code and a fifth code.
  • the fourth code is a code obtained by the base station according to the number of the previous scheduling carrier and a preset fourth mapping relationship
  • the fifth code is a code obtained by the base station according to the number of the next scheduled carrier and the fourth mapping relationship
  • the fourth mapping The relationship is used to indicate a fourth code corresponding to the number of the previous scheduled carrier, and a fifth code corresponding to the number of the next scheduled carrier.
  • the fourth coding may be obtained by binary coding the number of the previous scheduling carrier.
  • the fifth coding may be obtained by binary coding the number of the subsequent scheduling carrier.
  • the CAI field carried in the DCI received by the UE is a sixth code.
  • the sixth coding is a code obtained by the base station according to the number of the previous scheduling carrier, the number of the next scheduling carrier, and a preset fourth mapping relationship, where the fourth mapping relationship is used to indicate the number and location of the previous scheduling carrier.
  • the number of the next scheduled carrier is encoded in the sixth code corresponding to the joint coding.
  • the number of bits in the CAI field may be For the sixth coding specific coding mode, refer to the embodiment of the present invention described in FIG. 9 below.
  • the UE may send the HARQ information to the base station, where the UE may determine the total number of the scheduled carriers according to the CAI field, and determine the cumulative index value M of the at least one current scheduled carrier, and then according to the total number of scheduled carriers and the accumulation of at least one current scheduled carrier.
  • the index value M is used to send HARQ information to the base station.
  • the UE determines the total number of the scheduled carriers according to the CAI field, and determines the cumulative index value M of the at least one current scheduled carrier, which may be: for each CAI field, The UE acquires the total number of scheduling carriers according to the first mapping relationship and the first coding, and acquires M according to the second mapping relationship and the second encoding.
  • the CAI field includes the first encoding and the third encoding
  • the UE determines according to the CAI field.
  • the total number of the scheduled carriers is determined, and the cumulative index value M of the at least one current scheduling carrier is determined. Specifically, for each CAI field, the total number of scheduling carriers is obtained according to the first mapping relationship and the first coding, and according to the third mapping. Relationship and third encoding, get M.
  • the UE when the CAI field is used to indicate the number of the previous scheduling carrier of the current scheduling carrier and the number of the next scheduling carrier, the UE sends the HARQ information to the base station, where the UE may be based on the CAI. a field, determining a number of a previous scheduling carrier of the at least one current scheduling carrier and a number of the next scheduling carrier, and determining a total number of scheduling carriers according to the number of the previous scheduling carrier of the at least one current scheduling carrier and the number of the next scheduling carrier. And then transmitting HARQ information to the base station according to the total number of scheduled carriers and the number of the previous scheduling carrier of the at least one current scheduling carrier and the number of the next scheduling carrier.
  • the UE determines, according to the CAI field, the number of the previous scheduling carrier of the at least one current scheduling carrier and the number of the subsequent scheduling carrier, which may be specifically: for each CAI a field, the UE acquires the number of the previous scheduling carrier according to the fourth coding and the fourth mapping relationship, and obtains the number of the next scheduling carrier according to the fifth coding and the fourth mapping relationship;
  • the CAI field is In the sixth coding, the UE determines, according to the CAI field, the number of the previous scheduling carrier of the at least one current scheduling carrier and the number of the next scheduling carrier, which may be: for each CAI field, the UE according to the sixth encoding and the fourth Mapping the relationship, obtaining the number of the previous scheduled carrier and the number of the next scheduled carrier.
  • the number of bits of the HARQ information in the present invention is equal to the sum of the number of bits required to feed back whether the data sent on each scheduling carrier is correctly received, that is, the number of bits of the HARQ information in the present invention is based on the scheduled carrier.
  • the total number is determined, and the number of bits of the HARQ information sent by the UE to the base station in the prior art is determined based on the total number of configured carriers.
  • the UE may determine the number of bits of the HARQ information sent to the base station according to the total number of the scheduled carriers of the base station, and determine the HARQ information sent to the base station according to the total number of configured carriers according to the base station in the prior art.
  • the number of bits is small, thus reducing the feedback overhead of the UE.
  • Another embodiment of the present invention provides a carrier scheduling indication method.
  • the base station may carry a CAI field in the DCI sent to the UE, so that the UE can perform the CAI carried in all the received DCIs.
  • the field is used to learn the carrier scheduling performed by the base station.
  • the total number of all configured carriers of the base station is equal to 16, and the carriers scheduled by the base station are CC0, CC2, and CC5, and are combined.
  • the method may include:
  • the base station acquires a total number of scheduled carriers in all configured carriers, and acquires an accumulated index value M of the current scheduled carrier.
  • M represents the first configured carrier to the current scheduled carrier
  • the current scheduled carrier is the Mth scheduled carrier.
  • the carrier scheduled by the base station is CC0, CC2, and CC5. Therefore, the total number of scheduling carriers acquired by the base station is 3, the cumulative index value of the current scheduling carrier CC0 is 1, and the cumulative index value of the current scheduling carrier CC2 is 2. The cumulative index value of the current scheduled carrier CC5 is 3.
  • the base station acquires according to the total number of scheduled carriers and a preset first mapping relationship. First encoding, and acquiring the second encoding according to the cumulative index value M of the current scheduled carrier and the preset second mapping relationship.
  • the first mapping relationship is used to indicate a first code corresponding to the total number of scheduled carriers, and the second mapping relationship is used to indicate the second code corresponding to the M.
  • the first mapping relationship preset in the base station may be as shown in Table 1.
  • the preset second mapping relationship may be as shown in Table 2.
  • the base station queries the table 1 according to the total number of the obtained scheduled carriers (the total number of the scheduled carriers is equal to 3), and obtains the first code is 0010, and according to the obtained cumulative index value of the current scheduled carrier CC0 (the CC0
  • the cumulative index value is equal to 1)
  • the query table 2 obtains the second code is 0000; for CC2, the first code acquired by the base station is 0010, and according to the obtained cumulative index value of the current scheduled carrier CC2 (the CC2)
  • the cumulative index value is equal to 2)
  • the query table 2 the second code is 0001; for CC5, the first code acquired by the base station is 0010, and according to the obtained cumulative index value of the current scheduled carrier CC5 (described The cumulative index value of CC5 is equal to 3).
  • the base station may acquire the first code only once, and then obtain the second code of each current scheduled carrier separately.
  • Cumulative index value of the current scheduled carrier Second code 1 0000 2 0001 3 0010 4 0011 5 0100 6 0101 7 0110 8 0111 9 1000 10 1001 11 1010 12 1011 13 1100 14 1101 15 1110 16 1111
  • Tables 1 and 2 of the embodiment of the present invention are only examples.
  • the specific value of the first code corresponding to the total number of scheduled carriers in Table 1 is not used herein. , that is, the coding mode, the restriction, and the specific value of the second coding corresponding to the cumulative index value of the current scheduled carrier in Table 2, that is, the coding mode, is limited, and the first coding corresponding to the total number of scheduled carriers
  • the specific value of the second code corresponding to the cumulative index value of the current scheduled carrier may be set according to the needs of the actual scenario.
  • the base station combines the first code and the second code to generate a CAI field.
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value of the current scheduled carrier. According to the example in S502, since the total number of all configured carriers of the base station is equal to 16, the number of bits in the CAI field may be Thus, the number of bits of the CAI field generated by the base station is 8. And, in the generated CAI field, in the first possible implementation manner, the first code is located in the first 4 bits of the CAI field, and the second code is located in the last 4 bits of the CAI field, in the second possible implementation manner. The first code is located in the last 4 bits of the CAI field, and the second code is located in the first 4 bits of the CAI field.
  • the CAI field of the CC0 generated by the base station according to the first possible implementation is 00100000
  • the CAI field of the CC0 generated by the base station according to the second possible implementation is 00000010
  • the CAI field of the CC2 generated by the base station according to the first possible implementation is 00100001
  • the CAI field of the CC2 generated by the base station according to the second possible implementation is 00010010.
  • the base station is according to the first possible implementation manner.
  • the CAI field of the generated CC5 is 00100010
  • the CAI field of the CC5 generated by the base station according to the second possible implementation manner is 00100010.
  • the base station carries the CAI field in the DCI and sends the UE to the UE by using the current scheduling carrier.
  • the base station may carry the CAI field of the generated CC0 in the DCI and send it to the UE through the CC0.
  • the CAI field of the generated CC2 may be carried in the DCI and sent to the UE through the CC2
  • the CAI field of the generated CC5 may be carried in the DCI. It is sent to the UE through CC5.
  • the UE receives the DCI carrying the CAI field sent by the base station by using the at least one current scheduling carrier, and acquires a CAI field in the DCI, so as to learn the scheduling situation of all configured carriers.
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the current scheduled carrier, including the first code and the second code.
  • the first 4 bits of the CAI field are the first code
  • the last 4 bits are the second code.
  • the first 4 bits of the CAI field are the second code
  • the last 4 bits are the first code.
  • the UE After the UE receives the DCI sent by the base station through the CC0, CC2, and CC5, and acquires the CAI field in each DCI, the information in each CAI field can be obtained. Know the scheduling of all configured carriers. Afterwards, the UE can receive data according to the DCI. Optionally, in order to ensure the reliability of the data transmission, the UE may send the HARQ information to the base station to feedback whether it correctly receives the data sent by the base station through all the scheduling carriers, and therefore, After S505, the method may further include S506-S507.
  • the UE determines, according to the CAI field, a total number of scheduling carriers, and determines an accumulated index value M of the at least one current scheduling carrier.
  • the S506 may be specifically: for each CAI field obtained, the UE acquires the total number of scheduling carriers according to the first mapping relationship and the first encoding, and acquires M according to the second mapping relationship and the second encoding.
  • the first mapping relationship preset in the base station is as shown in Table 1
  • the first mapping relationship preset in the UE is also shown in Table 1
  • the second mapping relationship preset in the base station is as shown in Table 2.
  • the second mapping relationship preset in the UE is also shown in Table 2.
  • the query table 1 obtains the cumulative index value of the current scheduled carrier CC0, and the same, if the UE receives the DCI through the CC2, and carries the DCI
  • the CAI field is 00100001
  • the UE can obtain the total number of the scheduled carriers to be 3, and obtain the cumulative index value of the current scheduled carrier CC5.
  • the UE receives the DCI through the CC5, and the CAI field carried in the DCI is 00100010, the UE can The total number of acquired scheduling carriers is 3, and the cumulative index value of the current scheduled carrier CC5 is obtained as 3.
  • the UE sends the HARQ information to the base station according to the total number of the scheduled carriers and the cumulative index value M of the at least one current scheduled carrier.
  • the number of bits of the HARQ information may be equal to the sum of the number of bits required to feed back whether the data transmitted on each of the scheduled carriers is correctly received.
  • the UE After knowing the total number of scheduling carriers and the cumulative index value M of at least one current scheduling carrier, the UE can learn the scheduling situation of all configured carriers in combination with the information in each CAI field, so that in combination with each of the scheduled carriers The UE can send HARQ information to the base station when the data is transmitted.
  • the UE may send the HARQ information to the base station by using the primary carrier, or may send the HARQ information to the base station by using the primary carrier and the secondary carrier, where the embodiment of the present invention uses the HARQ information for sending the HARQ information.
  • the carrier is not specifically limited.
  • the specific carrier used for transmitting HARQ information can be selected according to the requirements of the actual application scenario.
  • the UE when the number of bits required for feeding back data transmitted on each scheduling carrier is correctly received, “1” indicates that the UE correctly receives data, and “0” indicates that the UE does not correctly receive data.
  • the UE can learn that the base station performs data transmission through CC0 and CC5 respectively, and can know that the total number of scheduled carriers of the base station is equal to 3, the cumulative index value of CC0 is 1, and the cumulative index of CC5 is If the value is 3, if the UE only correctly receives the data sent by the base station through CC0, the HARQ information sent by the UE to the base station is 100, indicating that the data that the base station has correctly received by the current scheduled carrier whose cumulative index value is 1 is incorrect.
  • the receiving base station transmits data by using a scheduling carrier with an accumulated index value of 2 and an accumulated index value of 3.
  • the base station may retransmit at least one of the DCI and the data to the UE by using the scheduling carrier with the accumulated index value of 2 and the cumulative index value of 3.
  • the number of bits of the HARQ information is equal to the total number of scheduled carriers of the base station, and the prior art
  • the number of bits of the HARQ information sent by the UE to the base station is equal to the total number of the configured carriers of the base station.
  • the scheduling carrier indication provided by the UE since the total number of the scheduled carriers of the base station is less than or equal to the total number of the scheduled carriers of the base station, the scheduling carrier indication provided by the UE according to the embodiment of the present invention, the UE The number of bits of the HARQ information transmitted to the base station may be determined according to the total number of the scheduled carriers of the base station, and the number of bits of the HARQ information transmitted to the base station is determined to be smaller than the total number of configured carriers according to the base station in the prior art, thus reducing the UE. Feedback overhead.
  • the UE can only use the physical uplink control channel format 3 (English: Physical Uplink Control Channel) Format 3, abbreviated as: PUCCH format 3) Sending HARQ information to the base station, but the maximum number of feedback bits supported by PUCCH format 3 is 20, so that when the total number of carriers configured by the base station is large (that is, the total number of configured carriers is large) If the HARQ information sent to the base station is determined according to the total number of configured carriers of the base station in the prior art, the number of bits of the returned HARQ information may be greater than 20, resulting in failure of the HARQ information transmission, but if the UE is scheduled according to the present invention.
  • PUCCH format 3 Physical Uplink Control Channel 3
  • PUCCH format 3 Physical Uplink Control Channel 3
  • the number of bits of the returned HARQ information may be greater than 20, resulting in failure of the HARQ information transmission, but if the UE is scheduled according to the present invention.
  • the UE determines that the probability that the number of bits of the HARQ information transmitted to the base station is greater than 20 according to the total number of the scheduled carriers of the base station is greatly reduced. Therefore, the UE may send the HARQ information to the base station by using the PUCCH format 3.
  • the method may include:
  • the base station acquires a total number of scheduled carriers in all configured carriers, and acquires an accumulated index value M of the current scheduled carrier.
  • the base station judges Whether it is greater than 2.
  • the base station may first Judge Whether it is greater than 2 when determined When it is not more than 2, execute S603-S604 when determining When it is greater than 2, S605-S606 is executed. Assuming that the total number N of configured carriers of the base station is equal to 16, based on this, the base station can determine If it is greater than 2, the base station continues to execute S605-S606 after executing S602.
  • the base station acquires the first code according to the total number of the scheduled carriers and the preset first mapping relationship, and acquires the second code according to the cumulative index value M of the current scheduled carrier and the preset second mapping relationship.
  • the first mapping relationship is used to indicate a first code corresponding to the total number of scheduled carriers, and the second mapping relationship is used to indicate the second code corresponding to the M.
  • the number of bits of the first code and the second code may be any number of bits of the first code and the second code.
  • the base station combines the first code and the second code to generate a CAI field.
  • the base station acquires the first code according to the total number of the scheduled carriers and the preset first mapping relationship, and according to the cumulative index value M of the current scheduled carrier and the preset third mapping. Relationship, get the third code.
  • the third mapping relationship is used to indicate a third encoding corresponding to the cumulative index value M of the current scheduling carrier, and the number of bits of the third encoding is smaller than the number of bits of the second encoding.
  • the number of bits of the third encoding can be smaller than the number of bits of the second encoding, that is, the number of bits of the third encoding is smaller than
  • the number of bits of the third encoding may be smaller than That is, the number of bits of the third code may be 2 or 3, and the number of bits of the third code is 2, and the third mapping relationship preset in the base station may be as shown in Table 3.
  • M is equal to 1, 5, 9, and 13, respectively, the corresponding third code is 00, that is, the number of bits of the third code is 2.
  • the base station is based on the total number of acquired carrier carriers (for example, The total number of the scheduled carriers is equal to 3).
  • the first code is obtained as 0010, and according to the obtained cumulative index value of the current scheduled carrier CC0 (the cumulative index value of the CC0 is equal to 1), the table 3 is queried.
  • Obtaining a third code is 00; for CC2, the first code acquired by the base station is 0010, and according to the obtained cumulative index value of the current scheduled carrier CC2 (the cumulative index value of the CC2 is equal to 2), the query table 3 is obtained.
  • the base station may acquire the first code only once, and then obtain the second code of each current scheduled carrier separately.
  • Cumulative index value of the current scheduled carrier Third code 1 or 5 or 9 or 13 00 2 or 6 or 10 or 14 01 3 or 7 or 11 or 15 10 4 or 8 or 12 or 16 11
  • Table 3 of the embodiment of the present invention are only examples.
  • the specific value of the third code corresponding to the cumulative index value of the current scheduled carrier in Table 3 is not used herein.
  • the specific value of the second code corresponding to the cumulative index value of the current scheduled carrier may be set accordingly according to the needs of the actual scenario.
  • the base station combines the first code and the third code to generate a CAI field.
  • the CAI field of the CC0 generated by the base station according to the first possible implementation is 001000, and the CAI field of the CC0 generated by the base station according to the second possible implementation is 000010; for CC2, The CAI field of the CC2 generated by the base station according to the first possible implementation is 001001, and the CAI field of the CC2 generated by the base station according to the second possible implementation is 010010.
  • the base station is according to the first possible implementation manner.
  • the CAI field of the generated CC5 is 001010
  • the CAI field of the CC5 generated by the base station according to the second possible implementation is 100010.
  • the base station carries the CAI field in the DCI and sends the UE to the UE by using the current scheduling carrier.
  • the third code acquired by the base station according to the third mapping relationship is smaller than the number of bits of the second code acquired by the base station according to the second mapping relationship, so that the base station generates the CAI according to the first coding and the third coding combination.
  • the number of bits of the field is smaller than the number of bits of the CAI field generated by the base station according to the combination of the first coding and the second coding. That is, when At 2 o'clock, preferably, the base station generates a CAI field according to the first coding and the third coding combination, so that the field length of the DCI can be further reduced, thereby reducing signaling overhead.
  • the UE receives the DCI carrying the CAI field sent by the base station by using the at least one current scheduling carrier, and acquires a CAI field in the DCI, so as to learn the scheduling situation of all configured carriers.
  • the CAI field is used to indicate the total number of scheduling carriers and the cumulative index value M of the current scheduling carrier in all the configured carriers configured by the base station, and may include the first encoding and the second encoding, and may also include the first encoding and the third encoding.
  • the CAI field includes the first code and the second code
  • the first 4 bits of the CAI field are the first code
  • the last 2 bits are the second code.
  • the first 2 bits of the CAI field are the second code
  • the last 4 bits are the first code.
  • the CAI field includes the first code and the third code
  • the first 4 bits of the CAI field are the first code
  • the last 2 bits are the third code.
  • the first 2 bits of the CAI field are the third code
  • the last 4 bits are the first code.
  • the UE After the UE receives the DCI sent by the base station, and obtains the CAI field in the DCI, and learns the scheduling situation of all the configured carriers, the UE can receive the data according to the DCI.
  • the UE The HARQ information may be sent to the base station to feed back whether it correctly receives the data transmitted by the base station through all the scheduled carriers. Therefore, after S608, the method further includes S609-S610.
  • the UE determines, according to the CAI field, a total number of scheduling carriers, and determines an accumulated index value M of the at least one current scheduling carrier.
  • the S609 may be specifically: for each CAI field, acquiring the total number of scheduling carriers according to the first mapping relationship and the first coding, and according to the third mapping relationship and The third code acquires M.
  • the UE when the first mapping relationship preset in the base station is as shown in Table 1, the UE The first mapping relationship preset in the network is also as described in Table 1.
  • the third mapping relationship preset in the base station is as shown in Table 3
  • the third mapping relationship preset in the UE is also shown in Table 3.
  • the query table 2 obtains the cumulative index values corresponding to the third code 00, 1, 5, 9, and 13, because the DCI carrying the CAI field
  • the UE is received by the current scheduling carrier CC0. Therefore, the UE can obtain the cumulative index value of the current scheduling carrier CC0.
  • the UE receives the DCI through the CC2, and the CAI field carried in the DCI is 001001, the total number of the scheduled carriers can be obtained by the UE, and the cumulative index value of the current scheduled carrier CC2 can be obtained as 2;
  • the total number of scheduling carriers that the UE can acquire is 3, and the cumulative index value of the current scheduled carrier CC5 can be obtained as 3.
  • the process of determining the total number of the scheduled carriers according to the CAI field, and determining the cumulative index value M of the at least one current scheduled carrier may refer to S506 in the foregoing embodiment.
  • the detailed description of the embodiments of the present invention is not described herein again.
  • the UE sends the HARQ information to the base station according to the total number of the scheduled carriers and the accumulated index value M of the at least one current scheduled carrier.
  • the number of bits of the HARQ information is equal to the sum of the number of bits required to feed back whether the data transmitted on each of the scheduled carriers is correctly received.
  • the method may include:
  • the base station acquires a number of a previous scheduling carrier of the current scheduling carrier and a number of a subsequent scheduling carrier.
  • the carriers scheduled by the base station are CC0, CC2, and CC5. Therefore, for CC0, the number of the previous scheduling carrier is 5, and the number of the next scheduled carrier. For CC2, the number of the previous scheduling carrier is 0, and the number of the latter scheduling carrier is 5; for CC5, the number of the previous scheduling carrier is 2, and the number of the latter scheduling carrier is 0.
  • the number of the previous scheduled carrier is 5 for CC5.
  • the number of the next scheduled carrier is also 5.
  • the total number of configured carriers of the base station is 16, and the scheduled carriers are CC5 and CC8, then for CC5, the number of the previous scheduled carrier is 8, and then The number of one scheduling carrier is also 8. For CC8, the number of the previous scheduling carrier is 5, and the number of the latter scheduling carrier is also 5.
  • the base station acquires the fourth code according to the number of the previous scheduling carrier and the fourth mapping relationship, and acquires the fifth code according to the number of the next scheduling carrier and the fourth mapping relationship.
  • the fourth mapping relationship is used to indicate a fourth encoding corresponding to the number of the previous scheduling carrier, and a fifth encoding corresponding to the number of the next scheduling carrier.
  • the preset fourth mapping relationship may be as shown in Table 4. After the base station obtains the number of the previous scheduling carrier of the current scheduling carrier and the number of the next scheduling carrier, the base station may be based on the number of the previous scheduling carrier. Query the table 4, obtain the fourth code, and query the table 4 according to the number of the next scheduled carrier to obtain the fifth code.
  • Scheduling carrier number Fourth code 1 0000 2 0001 3 0010 4 0011 5 0100 6 0101 7 0110 8 0111 9 1000 10 1001 11 1010 12 1011 13 1100 14 1101 15 1110 16 1111
  • Table 4 of the embodiment of the present invention is only examples.
  • the embodiment of the present invention does not limit the specific value of the code corresponding to the number of the scheduled carrier in Table 4, and schedules.
  • the specific value of the code corresponding to the carrier number can be set according to the needs of the actual scenario.
  • the fourth coding may be obtained by binary coding the number of the previous scheduling carrier
  • the fifth coding may be obtained by binary coding the number of the next scheduling carrier, so that the base station acquires the previous scheduling of the current scheduling carrier.
  • the number of the previous scheduling carrier may be directly coded to obtain a fourth code
  • the number of the next scheduled carrier may be binary coded to obtain a fifth code.
  • the number of carriers configured by the base station is equal to 16
  • the number of coded bits of the previous scheduled carrier and the number of coded bits of the latter scheduled carrier are 4.
  • the base station acquires the previous one of CC0.
  • the binary code of the number 5 of the scheduling carrier is 0101, and the binary code of the number 2 of the latter scheduling carrier is 0010.
  • the base station obtains the binary code of the number 0 of the previous scheduling carrier of CC2 as 0000.
  • the binary code of number 5 of one scheduling carrier is 0101; for the current scheduling carrier CC5, the base station obtains the binary code of number 2 of the previous scheduling carrier of CC5 as 0010, and the binary code of number 0 of the latter scheduling carrier is 0000.
  • the base station combines the fourth code and the fifth code to generate a CAI field.
  • the CAI field is used to indicate the number of the previous scheduling carrier of the current scheduling carrier and the number of the next scheduling carrier.
  • the total number of all configured carriers of the base station is equal to 16, and the number of bits in the CAI field may be
  • the number of bits of the CAI field generated by the base station is 8.
  • the fourth code is located in the first 4 bits of the CAI field
  • the fifth code is located in the last 4 bits of the CAI field, in the second possible implementation manner.
  • the fifth code is located in the first 4 bits of the CAI field, and the fourth code is located in the last 4 bits of the CAI field.
  • the CAI field corresponding to each current scheduling carrier generated by the base station according to the first possible implementation manner may be as shown in Table 5, and the CAI corresponding to each current scheduling carrier generated by the base station according to the second possible implementation manner.
  • the fields can be as shown in Table 6.
  • the base station carries the CAI field in the DCI and sends the UE to the UE by using the current scheduling carrier.
  • the UE receives the DCI carrying the CAI field sent by the base station by using the at least one current scheduling carrier, and acquires a CAI field in the DCI, so as to learn the scheduling situation of all configured carriers.
  • the CAI field is used to indicate the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier, including the fourth code and the fifth code.
  • the first 4 bits of the CAI field are the fourth code
  • the last 4 bits of the CAI field are the fifth code
  • the first 4 bits of the CAI field are the fifth code
  • the last 4 bits of the CAI field are the fourth code.
  • the UE may receive the data according to the DCI.
  • the UE may send the HARQ information to the base station to feedback whether the base station correctly receives the base station through all the scheduling.
  • the data transmitted by the carrier therefore, after S705, the method further includes S706-S708.
  • the UE determines, according to the CAI field, a number of a previous scheduling carrier of the at least one current scheduling carrier and a number of a subsequent scheduling carrier.
  • the S706 may be specifically: for each CAI field, the UE acquires the number of the previous scheduling carrier according to the fourth coding and the fourth mapping relationship, and acquires the next scheduled carrier according to the fifth coding and the fourth mapping relationship. Numbering.
  • the fourth mapping relationship preset in the base station is as shown in Table 4
  • the fourth mapping relationship preset in the UE is also shown in Table 4.
  • the first 4 bits of the CAI field are the fourth encoding
  • the last 4 bits are the fifth code
  • the UE can obtain the current according to the fourth code, that is, the code 0101 of the first 4 bits of the CAI field.
  • the number of the previous scheduling carrier of the scheduling carrier CC0 is 5, and according to the fifth encoding, that is, the encoding 4010 of the last 4 bits of the CAI field, the number of the next scheduling carrier of the current scheduling carrier CC0 can be obtained as 2, the same, if The UE receives the DCI through the CC2, and the CAI field carried in the DCI is 00000101, and the UE according to the fourth coding, that is, the first four of the CAI fields.
  • the code 0000 of the bit can obtain the number of the previous scheduling carrier of the current scheduling carrier CC2, and can obtain the subsequent scheduling carrier of the current scheduling carrier CC2 according to the fifth encoding, that is, the encoding 0101 of the last 4 bits of the CAI field.
  • the number is 5; if the UE receives the DCI through the CC5, and the CAI field carried in the DCI is 00100000, the UE can obtain the previous one of the current scheduled carrier CC5 according to the fourth encoding, that is, the encoding of the first 4 bits of the CAI field, 0010.
  • the number of the scheduled carrier is 2, and according to the fifth code, that is, the code 0000 of the last 4 bits of the CAI field, the number of the next scheduled carrier of the current scheduled carrier CC5 can be obtained as 0.
  • the UE determines the total number of scheduling carriers according to the number of the previous scheduling carrier of the at least one current scheduling carrier and the number of the next scheduling carrier.
  • the UE may select the number of the previous scheduled carrier and the next scheduling according to the at least one current scheduled carrier.
  • the number of carriers determines the total number of scheduled carriers.
  • the number of the previous scheduling carrier of the CC0 is 5, the number of the previous scheduling carrier is 2, the number of the previous scheduling carrier of the CC2 is 0, and the number of the next scheduling carrier is 5.
  • the number of the previous scheduling carrier to the CC5 is 2, and the number of the next scheduling carrier is 0. Therefore, the UE can determine that the scheduling carriers of the base station are CC0, CC2, and CC5, respectively, that is, the UE can determine the scheduling carrier of the base station.
  • the total number is 3.
  • the UE sends the HARQ information to the base station according to the total number of the scheduled carriers and the number of the previous scheduling carrier of the at least one current scheduling carrier and the number of the next scheduling carrier.
  • the number of bits of the HARQ information is equal to the sum of the number of bits required to feed back whether the data transmitted on each of the scheduled carriers is correctly received.
  • the UE may be based on the total number of scheduling carriers and the previous scheduling carrier of the at least one current scheduling carrier. Number and the number of the next scheduled carrier, send HARQ information to the base station to feedback whether it correctly receives the base station through all the scheduling The data sent by the carrier.
  • the UE may send the HARQ information to the base station by using the primary carrier, or may send the HARQ information to the base station by using the primary carrier and the secondary carrier, where the embodiment of the present invention uses the HARQ information for sending the HARQ information.
  • the carrier is not specifically limited.
  • the specific carrier used for transmitting HARQ information can be selected according to the requirements of the actual application scenario.
  • the UE when the number of bits required for feeding back data transmitted on each scheduling carrier is correctly received, “1” indicates that the UE correctly receives data, and “0” indicates that the UE does not correctly receive data.
  • the UE receives the DCI through CC0 and CC5
  • the UE can learn that the base station performs data transmission through CC0 and CC5 respectively, and can learn that the scheduling carriers of the base station are CC0, CC2, and CC5, respectively, that is, the UE can learn the base station.
  • the total number of the scheduled carriers is 3, so that the UE can determine that the number of bits of the HARQ information sent to the base station is 3.
  • the HARQ information sent by the UE to the base station is 100 to indicate itself.
  • the data sent by the base station through the current scheduling carrier CC0 has been correctly received, and the data sent by the base station through the current scheduling carrier CC2 and the current scheduling carrier CC5 is not correctly received.
  • the base station After the base station receives the HARQ information sent by the UE, the base station retransmits the data sent by the current scheduling carrier CC2 and the current scheduling carrier CC5 to the UE.
  • the carrier scheduling indication method provided by the embodiment of the present invention is introduced by taking the total number of all configured carriers of the base station equal to 8 and the carriers scheduled by the base station are CC4 and CC5 as an example. As shown in FIG. 9, the method may include:
  • the base station acquires a number of a previous scheduling carrier of the current scheduling carrier and a number of a subsequent scheduling carrier.
  • the carrier scheduled by the base station is CC4 and CC5. Therefore, for CC4, the number of the previous scheduling carrier is 5, and the number of the latter scheduling carrier is also 5. For CC5, the number of the previous scheduling carrier. 4, the compilation of the next scheduled carrier The number is also 4.
  • the base station acquires the sixth code according to the number of the previous scheduling carrier, the number of the next scheduling carrier, and the fourth mapping relationship, and uses the sixth encoding as the CAI field.
  • the base station may obtain the root according to the number of the previous scheduling carrier, the number of the next scheduling carrier, and the fourth mapping relationship.
  • the sixth coding, and the sixth coding is used as the CAI field, since the total number of configured carriers of the base station is equal to 8, and the number of bits in the CAI field may be It can be concluded that the CAI field generated by the base station contains 5 bits.
  • the base station may configure the fourth mapping relationship corresponding to one scheduling carrier in a separate table and configure it in the base station.
  • the fourth mapping relationship corresponding to CC4 is as shown in Table 7.
  • the base station obtains the sixth code as 01111 and obtains the sixth code 01111 as the CAI field of the CC4 according to the number of the previous scheduled carrier that obtains the CC4, that is, the number of the fifth and the next scheduled carrier, that is, 5, the query table 7. .
  • the fourth mapping relationship corresponding to CC5 can be obtained according to the number of the previous scheduling carrier that obtains the CC5, that is, the number of the fourth and subsequent scheduling carriers, that is, 4, and the sixth mapping relationship is obtained. Encode and get the sixth code as the CAI field of CC5.
  • the base station may also configure the fourth mapping relationship corresponding to all the scheduling carriers in a common table and configure the base station in the base station.
  • the number of the previous scheduled carrier The number of the next scheduled carrier CAI field 0 0 00000 1 0 00001 2 0 00010 3 0 00011 1 1 00100 2 1 00101 3 1 00110 2 2 00111 3 2 01000 3 3 01001 4 4 01010 0 5 01011 1 5 01100 2 5 01101 3 5 01110 5 5 01111 6 5 10000 7 5 10001 0 6 10010 1 6 10011 2 6 10100 3 6 10101 6 10110 7 6 10111 0 7 11000 1 7 11001 2 7 11010 3 7 11011 7 7 11100 Reserved Reserved 11101 Reserved Reserved 11110 Reserved Reserved 11111
  • Table 7 of the embodiment of the present invention is only an example.
  • the embodiment of the present invention does not limit the specific value of the code corresponding to the number of the previous scheduling carrier and the number of the next scheduling carrier in Table 7, and the specific coding of the reservation, and the number of the previous scheduling carrier.
  • the specific value of the code corresponding to the number of the next scheduled carrier and the specific code reserved may be set according to the needs of the actual scenario.
  • the base station carries the CAI field in the DCI and sends the UE to the UE by using the current scheduling carrier.
  • the UE receives the DCI carrying the CAI field sent by the base station by using the at least one current scheduling carrier, and acquires a CAI field in the DCI, so as to learn the scheduling situation of all configured carriers.
  • the CAI field is a sixth code, which is used to indicate the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier.
  • the UE may receive the data according to the DCI.
  • the UE may send the HARQ information to the base station to feedback whether the base station correctly receives the base station through all the scheduling.
  • the data transmitted by the carrier therefore, after S804, the method further includes S805-S807.
  • the UE determines, according to the CAI field, a number of a previous scheduling carrier of the at least one current scheduling carrier and a number of a subsequent scheduling carrier.
  • the S805 may be: for each CAI field, the UE acquires the number of the previous scheduling carrier and the number of the next scheduling carrier according to the sixth coding and the fourth mapping relationship.
  • the UE if the UE receives the DCI through the CC4, and the CAI field included in the DCI is 01111, the UE queries the fourth mapping relationship corresponding to the CC4 according to the sixth code 01111, as shown in Table 7, and obtains the previous scheduled carrier of the CC4. The number is 5, and the number of the next scheduled carrier is also 5. Similarly, if the UE receives the DCI through the CC4, the UE may also query the fourth mapping relationship corresponding to the CC5 according to the CAI field carried in the DCI, and obtain the number of the previous scheduling carrier of the CC5 as 4, and the subsequent scheduling carrier. The number is 4.
  • the UE sends the HARQ information to the base station according to the total number of the scheduled carriers and the number of the previous scheduling carrier of the at least one current scheduling carrier and the number of the next scheduling carrier.
  • the carrier scheduling indication method provided by the embodiment of the present invention generates a CAI field of the current scheduling carrier according to the scheduling situation of all configured carriers configured by the base station, and carries the generated CAI field in the DCI, and sends the CAI field to the UE through the current scheduling carrier. Therefore, the UE learns the scheduling status of all configured carriers according to the CAI field in the DCI.
  • the CAI field used by the base station to send a carrier scheduling indication to the UE indicates the total number of all scheduled carriers and the cumulative index value of the current scheduled carrier, or indicates the previous scheduled carrier of the current scheduled carrier.
  • the number and the number of the next scheduled carrier indicates the scheduling information of the scheduling carrier, and in the prior art, the DAI2 field indication for the carrier scheduling indication sent by the base station to the UE is indicated.
  • the scheduling situation of each of the configured carriers except the current scheduled carrier and since the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, when the base station is configured, compared with the prior art
  • the number of carriers is large, the number of bits generated by the base station according to the method provided by the embodiment of the present invention is small, so that the field length of the DCI is reduced, thereby reducing the signaling overhead.
  • the UE may determine the number of bits of the HARQ information that is sent to the base station according to the total number of the scheduled carriers of the base station, because the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, Compared with the number of bits of the HARQ information sent by the UE to the base station according to the total number of all configured carriers, the number of bits of the HARQ information is reduced, thereby reducing the signaling overhead.
  • An embodiment of the present invention provides a base station. As shown in FIG. 10, the base station includes a processor 91 and a transmitter 92.
  • the processor 91 is configured to generate a CAI field of the current scheduling carrier according to the configured scheduling condition of all configured carriers.
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the current scheduled carrier, where M represents the first configured carrier to the current scheduled carrier, and the current scheduled carrier is the Mth scheduled carrier; Alternatively, the CAI field is used to indicate the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier.
  • the transmitter 92 is configured to carry the CAI field generated by the processor 91 in the DCI and send the UE to the UE by using the current scheduling carrier.
  • M is an integer greater than or equal to 1.
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers and the cumulative index value M of the current scheduled carrier
  • the processor 91 is configured to acquire the total number of the scheduled carriers, and obtain the M.
  • the first code is obtained according to the total number of the scheduled carriers and the preset first mapping relationship, and according to the M and the preset second mapping. Relationship, obtaining a second encoding; combining the first encoding and the second encoding to generate a CAI field.
  • the first mapping relationship is used to indicate the first code corresponding to the total number of the scheduled carriers, and the second mapping relationship is used to indicate the second code corresponding to the M.
  • the number of bits of the first code is The number of bits of the second encoding is
  • N is the total number of all the configured carriers; Indicates the value obtained by rounding up log 2 N.
  • the processor 91 is further configured to acquire the first code according to the total number of the scheduled carriers and the preset first mapping relationship, and according to the M and the preset second Mapping relationship, before obtaining the second code, judging Whether it is greater than 2.
  • the processor 91 is specifically used when When the value is not greater than 2, the first code is obtained according to the total number of the scheduled carriers and the first mapping relationship, and the second code is obtained according to the M and the second mapping relationship.
  • the processor 91 is further configured to be used when When the value is greater than 2, the first code is obtained according to the total number of the scheduled carriers and the first mapping relationship, and the third code is obtained according to the M and the preset third mapping relationship; combining the first code and the third code Generate a CAI field.
  • the third mapping relationship is used to indicate the third encoding corresponding to the M, where the number of bits of the third encoding is smaller than the number of bits of the second encoding.
  • the number of bits of the CAI field is
  • the second code is located after the CAI field Bits, or, the first code is located after the CAI field Bits, the second code is in front of the CAI field Bits.
  • the number of bits of the CAI field is
  • the first code is located before the CAI field a bit, the third code is located after the last bit of the CAI field, or the first code is located after the CAI field The first bit, the third code is located in the first a bit of the CAI field.
  • the CAI field is used to indicate the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier
  • the processor 91 is configured to obtain a number of a previous scheduling carrier of the current scheduling carrier and a number of a subsequent scheduling carrier, and generate a number according to a previous scheduling carrier number, a subsequent scheduling carrier number, and a preset fourth mapping relationship. CAI field.
  • the fourth mapping relationship is used to indicate a fourth encoding corresponding to the number of the previous scheduling carrier, and a fifth encoding corresponding to the number of the subsequent scheduling carrier.
  • the processor 91 is configured to acquire the fourth code according to the number of the previous scheduling carrier and the fourth mapping relationship, and acquire according to the number of the next scheduling carrier and the fourth mapping relationship.
  • the fifth encoding; the fourth encoding and the The fifth coding combination generates the CAI field.
  • the fourth mapping relationship is used to indicate the number of the previous scheduling carrier, and the sixth encoding corresponding to the number of the subsequent scheduling carrier after the joint encoding;
  • the number of coded bits is less than the sum of the number of bits of the fourth code and the fifth code.
  • the processor 91 is configured to acquire the sixth encoding according to the number of the previous scheduling carrier, the number of the next scheduling carrier, and the fourth mapping relationship, and use the sixth encoding as the CAI. Field.
  • the number of bits of the CAI field is
  • the fifth system code is located after the CAI field Bits; or, the fourth code is located after the CAI field Bits, the fifth code is in front of the CAI field Bits.
  • the number of bits in the CAI field may be For the sixth coding specific coding mode, refer to the embodiment of the present invention described in FIG. 9 below.
  • the base station provided by the embodiment of the present invention after generating the CAI field of the current scheduling carrier according to the scheduling situation of all configured carriers configured by itself, carries the generated CAI field in the DCI and sends the CAI field to the UE through the current scheduling carrier.
  • the CAI field used by the base station to send a carrier scheduling indication to the UE indicates the total number of all scheduled carriers and the cumulative index value of the current scheduled carrier, or indicates the previous scheduled carrier of the current scheduled carrier.
  • the number and the number of the next scheduled carrier, that is, the CAI field in the present invention indicates the scheduling information of the scheduling carrier, and in the prior art, the DAI2 field indication for the carrier scheduling indication sent by the base station to the UE is indicated.
  • the UE may include: a receiver 1001 and a processor 1002.
  • the receiver 1001 is configured to receive downlink control information DCI that carries a carrier allocation indication CAI field sent by the base station by using at least one current scheduling carrier.
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the current scheduled carrier, where M represents the first configured carrier to the current scheduled carrier, and the current scheduled carrier is the Mth scheduled. Or the CAI field is used to indicate the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier.
  • the processor 1002 is configured to acquire the CAI field in the DCI received by the receiver 1001, so as to learn the scheduling situation of all the configured carriers.
  • the UE may further include: a transmitter 1003.
  • the transmitter 1003 is configured to send hybrid automatic retransmission HARQ information to the base station after the processor 1002 acquires the CAI field in the DCI.
  • the HARQ information is used to feedback whether the data sent by the base station through all the scheduling carriers is correctly received, and the number of bits of the HARQ information is equal to whether the data sent on each of the scheduling carriers is correctly received. The sum of the number of bits.
  • the CAI field is used to indicate the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value M of the current scheduled carrier
  • the CAI field includes a first code and a second code, where the first code is a code obtained by the base station according to the total number of the scheduled carriers and a preset first mapping relationship, where the first The mapping relationship is used to indicate the first code corresponding to the total number of the scheduled carriers, and the second code is a code obtained by the base station according to the M and a preset second mapping relationship, and the second mapping relationship Used to indicate the M corresponding The second encoding.
  • the CAI field includes the first code and the third code, where the third code is an code obtained by the base station according to the M and a preset third mapping relationship, where The third mapping relationship is used to indicate the third encoding corresponding to the M.
  • the number of bits of the third encoding is smaller than the number of bits of the second encoding.
  • the CAI field is used to indicate the number of the previous scheduled carrier of the current scheduled carrier and the number of the next scheduled carrier
  • the CAI field includes a fourth encoding and a fifth encoding, where the fourth encoding is an encoding obtained by the base station according to the number of the previous scheduling carrier and a preset fourth mapping relationship.
  • the fifth code is a code obtained by the base station according to the number of the next scheduled carrier and the fourth mapping relationship, where the fourth mapping relationship is used to indicate the number corresponding to the number of the previous scheduling carrier. a fourth code, and the fifth code corresponding to the number of the next scheduled carrier.
  • the CAI field is a sixth code
  • the sixth code is a number of the previous scheduling carrier, a number of the next scheduled carrier, and a preset fourth according to the base station.
  • the processor 1002 is further configured to determine, according to the CAI field, a total number of the scheduled carriers, and determine an accumulated index value M of the at least one current scheduled carrier.
  • the transmitter 1003 is specifically configured to send the HARQ information to the base station according to the total number of scheduling carriers determined by the processor 1002 and the cumulative index value M of the at least one current scheduling carrier.
  • the processor 1002 is further configured to determine, according to the CAI field, a number of a previous scheduling carrier of the at least one current scheduling carrier and a number of the next scheduling carrier, and according to the at least one current scheduling.
  • the number of the previous scheduled carrier of the carrier and the number of the next scheduled carrier determine the total number of scheduled carriers.
  • the transmitter 1003 is specifically configured to: according to the scheduled carrier determined by the processor 1002 The total number and the number of the previous scheduled carrier of the at least one current scheduled carrier and the number of the next scheduled carrier transmit HARQ information to the base station.
  • the CAI field includes the first code and the second code
  • the processor 1002 is configured to acquire, according to the first mapping relationship and the first encoding, a total number of scheduling carriers according to the first mapping relationship, and acquire M according to the second mapping relationship and the second encoding.
  • the CAI field includes the first code and the third code
  • the processor 1002 is specifically configured to acquire, according to the first mapping relationship and the first encoding, a total number of scheduling carriers according to the first mapping relationship, and acquire M according to the third mapping relationship and the third encoding.
  • the CAI field includes the fourth encoding and the fifth encoding
  • the processor 1002 is configured to acquire a number of the previous scheduling carrier according to the fourth encoding and the fourth mapping relationship, and according to the fifth encoding and the fourth mapping relationship, according to the CAI field, Obtain the number of the next scheduled carrier.
  • the processor 1002 is specifically configured to acquire, for the CAI field, a number of the previous scheduling carrier and a number of the subsequent scheduling carrier according to the sixth encoding and the fourth mapping relationship.
  • the UE receives the DCI carrying the CAI field sent by the base station through the at least one current scheduling carrier, and acquires the CAI field in the DCI, so as to learn the scheduling situation of all configured carriers.
  • the CAI field received by the UE indicates the total number of scheduled carriers in all configured carriers configured by the base station and the cumulative index value of the current scheduled carrier, or indicates the previous scheduled carrier of the current scheduled carrier.
  • the number and the number of the next scheduled carrier, that is, the CAI field in the present invention indicates the scheduling information of the scheduling carrier, and in the prior art, the DAI2 field indication for the carrier scheduling indication sent by the base station to the UE is indicated.
  • the UE may determine the number of bits of the HARQ information that is sent to the base station according to the total number of the scheduled carriers of the base station, because the total number of scheduled carriers of the base station is less than or equal to the total number of configured carriers of the base station, Compared with the number of bits of the HARQ information sent by the UE to the base station according to the total number of all configured carriers, the number of bits of the HARQ information is reduced, thereby reducing the signaling overhead.
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are merely illustrative.
  • the division of the modules or units is only a logical function division.
  • there may be another division manner for example, multiple units or components may be used.
  • the combination may be integrated into another device, or some features may be ignored or not performed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the unit described as a separate component may or may not be physically divided
  • the component that is displayed as a unit may be a physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed to a plurality of different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a readable storage medium. Based on such understanding, the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium.
  • a number of instructions are included to cause a device (which may be a microcontroller, a chip, etc.) or a processor (English: processor) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read only memory (English: Read-Only Memory, abbreviated as: ROM), a random access memory (English: Random Access Memory, abbreviated as: RAM), a magnetic disk or an optical disk, and the like.
  • ROM Read-Only Memory
  • RAM Random Access Memory

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Abstract

本发明实施例公开了一种基站、用户终端及载波调度指示方法，涉及通信领域，解决了因基站的配置载波的数量较多导致的信令开销较大的问题。具体方案为：处理单元根据配置的所有配置载波的调度情况，生成当前调度载波的CAI字段；CAI字段用于指示所有配置载波中调度载波的总数和当前调度载波的累计索引值M，M表示从第一个配置载波到当前调度载波，当前调度载波是第M个被调度的载波；或者，CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号；发送单元将处理单元生成的CAI字段携带在DCI中通过当前调度载波发送至UE。本发明用于载波调度指示的过程中。

Description

一种基站、用户终端及载波调度指示方法
本申请要求于2015年02月10日提交中国专利局、申请号为201510069646.X、发明名称为“一种基站、用户终端及载波调度指示方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信领域，尤其涉及一种基站、用户终端及载波调度指示方法。
背景技术
在长期演进(英文：Long Term Evolution，简称：LTE)系统的演进过程中，为了提升系统的频谱带宽，第三代合作伙伴计划(英文：Third Generation Partnership Project，简称：3GPP)提出了载波聚合技术，其中，载波聚合技术是将多个连续的或者不连续的载波聚合到一起，形成一个更宽的频谱。当基站配置了多个载波时，可以通过配置的这多个载波，向用户终端(英文：User Equipment，简称：UE)同时发送数据。在基站通过配置载波(基站配置的载波)中的调度载波(基站用来传输数据的载波)向UE发送数据时，基站需通过每个调度载波向UE发送下行控制信息(英文：Downlink Control Information，简称：DCI)，以指示UE自身在该调度载波上占用的物理资源块、采用的调制编码方式等信息，以便UE根据接收到的DCI进行数据的接收。
在现有技术中，为了使UE能够获知基站的所有配置载波的调度情况，基站可以通过在向UE发送的DCI中新增下行分配指示(英文：Downlink Assignment Indication，简称：DAI)2字段，以指示除当前调度载波(传输DCI的载波)外的其它配置载波的调度情况，其中，DAI2字段的比特数是根据基站的配置载波数确定的，在数值上等于基站的配置载波数减1。
现有技术中至少存在如下问题，由于现有技术中的DAI2字段必须能够指示除当前调度载波外的其它所有配置载波的调度情况，因此DAI2字段的比特数在数值上等于基站的配置载波数减1，这样，当基站的配置载波的数量较多时，DAI2字段包含的比特数便会越多，使得DCI较长，从而导致信令开销较大。
发明内容
本发明提供一种基站、用户终端及载波调度指示方法，解决了因基站的配置载波的数量较多导致的信令开销较大的问题。
为达到上述目的，本发明采用如下技术方案：
本发明的第一方面，提供一种基站，所述基站包括：处理单元和发送单元；
所述处理单元，用于根据配置的所有配置载波的调度情况，生成当前调度载波的载波分配指示CAI字段；所述CAI字段用于指示所有所述配置载波中调度载波的总数和所述当前调度载波的累计索引值M，所述M表示从第一个所述配置载波到所述当前调度载波，所述当前调度载波是第M个被调度的载波；或者，所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号；
所述发送单元，用于将所述处理单元生成的所述CAI字段携带在下行控制信息DCI中通过所述当前调度载波发送至用户终端UE；
其中，M为大于等于1的整数。
结合本发明的第一方面，在一种可能的实现方式中，当所述CAI字段用于指示所有所述配置载波中调度载波的总数和所述当前调度载波的累计索引值M时，
所述处理单元，具体用于获取所述调度载波的总数，并获取所述M；根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码；将所述第一编码和所述第二编码组合生成所述CAI字段；
其中，所述第一映射关系用于指示所述调度载波的总数对应的 所述第一编码，所述第二映射关系用于指示所述M对应的所述第二编码。
结合第一方面和上述可能的实现方式，在另一种可能的实现方式中，所述第一编码的比特数为
Figure PCTCN2015083526-appb-000001
所述第二编码的比特数为
Figure PCTCN2015083526-appb-000002
其中，所述N为所有所述配置载波的总数；
Figure PCTCN2015083526-appb-000003
表示对log2N向上取整所得到的数值。
结合第一方面和上述可能的实现方式，在另一种可能的实现方式中，
所述处理单元，还用于在所述根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码之前，判断
Figure PCTCN2015083526-appb-000004
是否大于2；
所述处理单元，具体用于当
Figure PCTCN2015083526-appb-000005
不大于2时，根据所述调度载波的总数和所述第一映射关系，获取所述第一编码，并根据所述M和所述第二映射关系，获取所述第二编码。
结合第一方面和上述可能的实现方式，在另一种可能的实现方式中，
所述处理单元，还用于当
Figure PCTCN2015083526-appb-000006
大于2时，根据所述调度载波的总数和所述第一映射关系，获取所述第一编码，并根据所述M和预设的第三映射关系，获取第三编码；将所述第一编码和所述第三编码组合生成所述CAI字段；
其中，所述第三映射关系用于指示所述M对应的所述第三编码，所述第三编码的比特数小于所述第二编码的比特数。
结合第一方面和上述可能的实现方式，在另一种可能的实现方式中，
所述第一编码位于所述CAI字段的前
Figure PCTCN2015083526-appb-000007
个比特，所述第二编码位于所述CAI字段的后
Figure PCTCN2015083526-appb-000008
个比特；
或者，
所述第一编码位于所述CAI字段的后
Figure PCTCN2015083526-appb-000009
个比特，所述第二 编码位于所述CAI字段的前
Figure PCTCN2015083526-appb-000010
个比特。
结合第一方面和上述可能的实现方式，在另一种可能的实现方式中，
所述CAI字段的比特数为
Figure PCTCN2015083526-appb-000011
所述a为大于等于2，且小于
Figure PCTCN2015083526-appb-000012
的整数；
所述第一编码位于所述CAI字段的前
Figure PCTCN2015083526-appb-000013
个比特，所述第三编码位于所述CAI字段的后a个比特；
或者，
所述第一编码位于所述CAI字段的后
Figure PCTCN2015083526-appb-000014
个比特，所述第三编码位于所述CAI字段的前a个比特。
结合第一方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，
所述处理单元，具体用于获取所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号；根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系，生成所述CAI字段。
结合第一方面和上述可能的实现方式，在另一种可能的实现方式中，所述第四映射关系用于指示所述前一个调度载波的编号对应的第四编码，以及所述后一个调度载波的编号对应的第五编码；
所述处理单元，具体用于根据所述前一个调度载波的编号和所述第四映射关系，获取所述第四编码，并根据所述后一个调度载波的编号和所述第四映射关系，获取所述第五编码；将所述第四编码和所述第五编码组合生成所述CAI字段。
结合第一方面和上述可能的实现方式，在另一种可能的实现方式中，所述第四映射关系用于指示所述前一个调度载波的编号、所述后一个调度载波的编号进行联合编码后对应的第六编码；所述第六编码的比特数小于所述第四编码与所述第五编码的比特数之和；
所述处理单元，具体用于根据所述前一个调度载波的编号、所 述后一个调度载波的编号和所述第四映射关系，获取所述第六编码，将所述第六编码作为所述CAI字段。
结合第一方面和上述可能的实现方式，在另一种可能的实现方式中，所述CAI字段的比特数为
Figure PCTCN2015083526-appb-000015
所述第四编码位于所述CAI字段的前
Figure PCTCN2015083526-appb-000016
个比特，所述第五编码位于所述CAI字段的后
Figure PCTCN2015083526-appb-000017
个比特；
或者，
所述第四编码位于所述CAI字段的后
Figure PCTCN2015083526-appb-000018
个比特，所述第五编码位于所述CAI字段的前
Figure PCTCN2015083526-appb-000019
个比特。
结合第一方面和上述可能的实现方式，在另一种可能的实现方式中，所述CAI字段的比特数为
Figure PCTCN2015083526-appb-000020
本发明的第二方面，提供一种用户终端UE，所述UE包括：接收单元和处理单元；
所述接收单元，用于接收基站通过至少一个当前调度载波发送的携带载波分配指示CAI字段的下行控制信息DCI；所述CAI字段用于指示所述基站配置的所有配置载波中调度载波的总数和所述当前调度载波的累计索引值M，所述M表示从第一个所述配置载波到所述当前调度载波，所述当前调度载波是第M个被调度的载波；或者，所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号；
所述处理单元，用于获取所述接收单元接收到的所述DCI中的所述CAI字段，以便获知所述所有配置载波的调度情况。
结合本发明的第二方面，在一种可能的实现方式中，所述UE还包括：发送单元；
所述发送单元，用于在所述处理单元获取所述DCI中的所述CAI字段之后，向所述基站发送混合自动重传HARQ信息；
其中，所述HARQ信息用于反馈自身是否正确接收所述基站通过所有调度载波发送的数据，所述HARQ信息的比特数等于反馈每个所述调度载波上发送的数据是否被正确接收所需的比特数之和。
结合第二方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段用于指示所述基站配置的所有配置载波中调度载波的总数和所述当前调度载波的累计索引值M时，
所述CAI字段包括第一编码和第二编码，所述第一编码为所述基站根据所述调度载波的总数和预设的第一映射关系获得的编码，所述第一映射关系用于指示所述调度载波的总数对应的所述第一编码，所述第二编码为所述基站根据所述M和预设的第二映射关系获得的编码，所述第二映射关系用于指示所述M对应的所述第二编码；
或者，所述CAI字段包括所述第一编码和第三编码，所述第三编码为所述基站根据所述M和预设的第三映射关系获得的编码，所述第三映射关系用于指示所述M对应的所述第三编码；其中所述第三编码的比特数小于所述第二编码的比特数。
结合第二方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，
所述CAI字段包括第四编码和第五编码；所述第四编码为所述基站根据所述前一个调度载波的编号和预设的第四映射关系获得的编码，所述第五编码为所述基站根据所述后一个调度载波的编号和所述第四映射关系获得的编码，所述第四映射关系用于指示所述前一个调度载波的编号对应的所述第四编码，以及所述后一个调度载波的编号对应的所述第五编码；
或者，所述CAI字段为第六编码；所述第六编码为所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系获得的编码，所述第四映射关系用于指示所述前一个调度载波的编号、所述后一个调度载波的编号进行联合编码后对应的所述第六编码。
结合第二方面和上述可能的实现方式，在另一种可能的实现方式中，
所述处理单元，还用于根据所述CAI字段，确定所述调度载波 的总数，并确定所述至少一个当前调度载波的累计索引值M；
所述发送单元，具体用于根据所述处理单元确定出的所述调度载波的总数和所述至少一个当前调度载波的累计索引值M，向所述基站发送所述HARQ信息。
结合第二方面和上述可能的实现方式，在另一种可能的实现方式中，
所述处理单元，还用于根据所述CAI字段，确定所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，并根据所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，确定调度载波的总数；
所述发送单元，具体用于根据所述处理单元确定出的所述调度载波的总数和所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，向所述基站发送所述HARQ信息。
结合第二方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段包括所述第一编码和所述第二编码时，
所述处理单元，具体用于针对所述CAI字段，根据所述第一映射关系和所述第一编码，获取所述调度载波的总数，并根据所述第二映射关系和所述第二编码，获取所述M。
结合第二方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段包括所述第一编码和所述第三编码时，
所述处理单元，具体用于针对所述CAI字段，根据所述第一映射关系和所述第一编码，获取所述调度载波的总数，并根据所述第三映射关系和所述第三编码，获取所述M。
结合第二方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段包括所述第四编码和第五编码时，
所述处理单元，具体用于针对所述CAI字段，根据所述第四编码和所述第四映射关系，获取所述前一个调度载波的编号，并根据所述第五编码和所述第四映射关系，获取所述后一个调度载波的编号。
结合第二方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段为所述第六编码时，
所述处理单元，具体用于针对所述CAI字段，根据所述第六编码和所述第四映射关系，获取所述前一个调度载波的编号和所述后一个调度载波的编号。
本发明的第三方面，提供一种载波调度指示方法，所述方法包括：
基站根据自身配置的所有配置载波的调度情况，生成当前调度载波的载波分配指示CAI字段；所述CAI字段用于指示所有所述配置载波中调度载波的总数和所述当前调度载波的累计索引值M，所述M表示从第一个所述配置载波到所述当前调度载波，所述当前调度载波是第M个被调度的载波；或者，所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号；
所述基站将所述CAI字段携带在下行控制信息DCI中通过所述当前调度载波发送至用户终端UE；
其中，M为大于等于1的整数。
结合本发明的第三方面，在一种可能的实现方式中，当所述CAI字段用于指示所有所述配置载波中调度载波的总数和所述当前调度载波的累计索引值M时，所述基站根据自身配置的所有配置载波的调度情况，生成当前调度载波的载波分配指示CAI字段，包括：
所述基站获取所述调度载波的总数，并获取所述M；
所述基站根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码；其中，所述第一映射关系用于指示所述调度载波的总数对应的所述第一编码，所述第二映射关系用于指示所述M对应的所述第二编码；
所述基站将所述第一编码和所述第二编码组合生成所述CAI字段。
结合第三方面和上述可能的实现方式，在另一种可能的实现方式中，所述第一编码的比特数为
Figure PCTCN2015083526-appb-000021
所述第二编码的比特数为
Figure PCTCN2015083526-appb-000022
其中，所述N为所有所述配置载波的总数；
Figure PCTCN2015083526-appb-000023
表示对log2N向上取整所得到的数值。
结合第三方面和上述可能的实现方式，在另一种可能的实现方式中，在所述基站根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码之前，还包括：
所述基站判断
Figure PCTCN2015083526-appb-000024
是否大于2；
所述基站根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码，包括：
当
Figure PCTCN2015083526-appb-000025
不大于2时，所述基站根据所述调度载波的总数和所述第一映射关系，获取所述第一编码，并根据所述M和所述第二映射关系，获取所述第二编码。
结合第三方面和上述可能的实现方式，在另一种可能的实现方式中，所述方法还包括：
当
Figure PCTCN2015083526-appb-000026
大于2时，所述基站根据所述调度载波的总数和所述第一映射关系，获取所述第一编码，并根据所述M和预设的第三映射关系，获取第三编码；所述第三映射关系用于指示所述M对应的所述第三编码，所述第三编码的比特数小于所述第二编码的比特数；
所述基站将所述第一编码和所述第三编码组合生成所述CAI字段。
结合第三方面和上述可能的实现方式，在另一种可能的实现方式中，
所述第一编码位于所述CAI字段的前
Figure PCTCN2015083526-appb-000027
个比特，所述第二编码位于所述CAI字段的后
Figure PCTCN2015083526-appb-000028
个比特；
或者，
所述第一编码位于所述CAI字段的后
Figure PCTCN2015083526-appb-000029
个比特，所述第二编码位于所述CAI字段的前
Figure PCTCN2015083526-appb-000030
个比特。
结合第三方面和上述可能的实现方式，在另一种可能的实现方式中，所述CAI字段的比特数为
Figure PCTCN2015083526-appb-000031
所述a为大于等于2，且小于
Figure PCTCN2015083526-appb-000032
的整数；
所述第一编码位于所述CAI字段的前
Figure PCTCN2015083526-appb-000033
个比特，所述第三编码位于所述CAI字段的后a个比特；
或者，
所述第一编码位于所述CAI字段的后
Figure PCTCN2015083526-appb-000034
个比特，所述第三编码位于所述CAI字段的前a个比特。
结合第三方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，所述基站根据自身配置的所有配置载波的调度情况，生成当前调度载波的载波分配指示CAI字段，包括：
所述基站获取所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号；
所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系，生成所述CAI字段。
结合第三方面和上述可能的实现方式，在另一种可能的实现方式中，所述第四映射关系用于指示所述前一个调度载波的编号对应的第四编码，以及所述后一个调度载波的编号对应的第五编码；
所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系，生成所述CAI字段，包括：
所述基站根据所述前一个调度载波的编号和所述第四映射关系，获取所述第四编码，并根据所述后一个调度载波的编号和所述第四映射关系，获取所述第五编码；
所述基站将所述第四编码和所述第五编码组合生成所述CAI字段。
结合第三方面和上述可能的实现方式，在另一种可能的实现方式中，所述第四映射关系用于指示所述前一个调度载波的编号、所 述后一个调度载波的编号进行联合编码后对应的第六编码；所述第六编码的比特数小于所述第四编码与所述第五编码的比特数之和；
所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系，生成所述CAI字段，包括：
所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和所述第四映射关系，获取所述第六编码；
所述基站将所述第六编码作为所述CAI字段。
结合第三方面和上述可能的实现方式，在另一种可能的实现方式中，所述CAI字段的比特数为
Figure PCTCN2015083526-appb-000035
所述第四编码位于所述CAI字段的前
Figure PCTCN2015083526-appb-000036
个比特，所述第五编码位于所述CAI字段的后
Figure PCTCN2015083526-appb-000037
个比特；
或者，
所述第四编码位于所述CAI字段的后
Figure PCTCN2015083526-appb-000038
个比特，所述第五编码位于所述CAI字段的前
Figure PCTCN2015083526-appb-000039
个比特。
结合第三方面和上述可能的实现方式，在另一种可能的实现方式中，所述CAI字段的比特数为
Figure PCTCN2015083526-appb-000040
本发明的第四方面，提供一种载波调度指示方法，包括：
用户终端UE接收基站通过至少一个当前调度载波发送的携带载波分配指示CAI字段的下行控制信息DCI；所述CAI字段用于指示所述基站配置的所有配置载波中调度载波的总数和所述当前调度载波的累计索引值M，所述M表示从第一个所述配置载波到所述当前调度载波，所述当前调度载波是第M个被调度的载波；或者，所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号；
所述UE获取所述DCI中的所述CAI字段，以便获知所述所有配置载波的调度情况。
结合本发明的第四方面，在一种可能的实现方式中，在所述UE获取所述DCI中的所述CAI字段之后，还包括：
所述UE向所述基站发送混合自动重传HARQ信息；
其中，所述HARQ信息用于反馈自身是否正确接收所述基站通过所有调度载波发送的数据，所述HARQ信息的比特数等于反馈每个所述调度载波上发送的数据是否被正确接收所需的比特数之和。
结合第四方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段用于指示所述基站配置的所有配置载波中调度载波的总数和所述当前调度载波的累计索引值M时，
所述CAI字段包括第一编码和第二编码，所述第一编码为所述基站根据所述调度载波的总数和预设的第一映射关系获得的编码，所述第一映射关系用于指示所述调度载波的总数对应的所述第一编码，所述第二编码为所述基站根据所述M和预设的第二映射关系获得的编码，所述第二映射关系用于指示所述M对应的所述第二编码；
或者，所述CAI字段包括所述第一编码和第三编码，所述第三编码为所述基站根据所述M和预设的第三映射关系获得的编码，所述第三映射关系用于指示所述M对应的所述第三编码；其中所述第三编码的比特数小于所述第二编码的比特数。
结合第四方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，
所述CAI字段包括第四编码和第五编码；所述第四编码为所述基站根据所述前一个调度载波的编号和预设的第四映射关系获得的编码，所述第五编码为所述基站根据所述后一个调度载波的编号和所述第四映射关系获得的编码，所述第四映射关系用于指示所述前一个调度载波的编号对应的所述第四编码，以及所述后一个调度载波的编号对应的所述第五编码；
或者，所述CAI字段为第六编码；所述第六编码为所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系获得的编码，所述第四映射关系用于指示所述前一个调度载波的编号、所述后一个调度载波的编号进行联合编码后对应的所述第六编码。
结合第四方面和上述可能的实现方式，在另一种可能的实现方式中，所述UE向所述基站发送混合自动重传HARQ信息，包括：
所述UE根据所述CAI字段，确定所述调度载波的总数，并确定所述至少一个当前调度载波的累计索引值M；
所述UE根据所述调度载波的总数和所述至少一个当前调度载波的累计索引值M，向所述基站发送所述HARQ信息。
结合第四方面和上述可能的实现方式，在另一种可能的实现方式中，所述UE向所述基站发送混合自动重传HARQ信息，包括：
所述UE根据所述CAI字段，确定所述至少一个当前调度载波中的前一个调度载波的编号和后一个调度载波的编号；
所述UE根据所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，确定调度载波的总数；
所述UE根据所述调度载波的总数和所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，向所述基站发送所述HARQ信息。
结合第四方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段包括所述第一编码和所述第二编码时，所述UE根据所述CAI字段，确定所述调度载波的总数，并确定所述至少一个当前调度载波的累计索引值M，包括：
针对所述CAI字段，所述UE根据所述第一映射关系和所述第一编码，获取所述调度载波的总数，并根据所述第二映射关系和所述第二编码，获取所述M。
结合第四方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段包括所述第一编码和所述第三编码时，所述UE根据所述CAI字段，确定所述调度载波的总数，并确定所述至少一个当前调度载波的累计索引值M，包括：
针对所述CAI字段，所述UE根据所述第一映射关系和所述第一编码，获取所述调度载波的总数，并根据所述第三映射关系和所述第三编码，获取所述M。
结合第四方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段包括所述第四编码和所述第五编码时，所述UE根据所述CAI字段，确定所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，包括：
针对所述CAI字段，所述UE根据所述第四编码和所述第四映射关系，获取所述前一个调度载波的编号，并根据所述第五编码和所述第四映射关系，获取所述后一个调度载波的编号。
结合第四方面和上述可能的实现方式，在另一种可能的实现方式中，当所述CAI字段为所述第六编码时，所述UE根据所述CAI字段，确定所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，包括：
针对所述CAI字段，所述UE根据所述第六编码和所述第四映射关系，获取所述前一个调度载波的编号和所述后一个调度载波的编号。
本发明实施例提供的基站、用户终端及载波调度指示方法，在基站根据自身配置的所有配置载波的调度情况生成当前调度载波的CAI字段后，将生成的CAI字段携带在DCI中通过当前调度载波发送至UE。由于在本发明中，基站发送给UE的用于进行载波调度指示的CAI字段指示的是所有调度载波的总数和当前调度载波的累计索引值，或者指示的是当前调度载波的前一个调度载波的编号和后一个调度载波的编号，也就是说，本发明中的CAI字段指示的是调度载波的调度信息，而在现有技术中，基站发送给UE的用于进行载波调度指示的DAI2字段指示的是除当前调度载波外其它所有配置载波中的每个配置载波的调度情况，且由于基站的调度载波的总数小于等于基站的配置载波的总数，因此，与现有技术相比，当基站配置的载波数较多时，基站根据本发明实施例提供的方法生成的CAI字段包含的比特数较少，这样，便减小了DCI的字段长度，从而降低了信令开销。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本发明一实施例提供的一种基站的组成示意图；
图2为本发明另一实施例提供的一种UE的组成示意图；
图3为本发明另一实施例提供的另一种UE的组成示意图；
图4为本发明另一实施例提供的一种载波调度指示方法的流程图；
图5为本发明另一实施例提供的一种载波调度指示方法的流程图；
图6为本发明另一实施例提供的一种载波调度指示方法的流程图；
图7为本发明另一实施例提供的另一种载波调度指示方法的流程图；
图8为本发明另一实施例提供的另一种载波调度指示方法的流程图；
图9为本发明另一实施例提供的另一种载波调度指示方法的流程图；
图10为本发明另一实施例提供的一种基站的组成示意图；
图11为本发明另一实施例提供的一种UE的组成示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
另外，本文中术语“系统”和“网络”在本文中常被可互换使 用。
本发明实施例中的符号
Figure PCTCN2015083526-appb-000041
表示向上取整。
本发明一实施例提供一种基站，如图1所示，该基站包括：处理单元11和发送单元12。
处理单元11，用于根据配置的所有配置载波的调度情况，生成当前调度载波的载波分配指示(英文：Carrier Assignment Indication，简称CAI)字段。
其中，CAI字段用于指示所有配置载波中调度载波的总数和当前调度载波的累计索引值M，M表示从第一个配置载波到当前调度载波，当前调度载波是第M个被调度的载波；或者，CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号。
发送单元12，用于将处理单元11生成的CAI字段携带在DCI中通过当前调度载波发送至UE。
其中，M为大于等于1的整数。
在本发明实施例中，进一步的，当CAI字段用于指示所有配置载波中调度载波的总数和当前调度载波的累计索引值M时，
处理单元11，具体用于获取调度载波的总数，并获取M；根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码；将第一编码和第二编码组合生成CAI字段。
其中，所述第一映射关系用于指示所述调度载波的总数对应的所述第一编码，所述第二映射关系用于指示所述M对应的所述第二编码。
可选的，所述第一编码和所述第二编码的比特数为
Figure PCTCN2015083526-appb-000042
其中，所述N为所有所述配置载波的总数；
Figure PCTCN2015083526-appb-000043
表示对log2N向上取整所得到的数值。
在本发明实施例中，进一步的，处理单元11，还用于在根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据 所述M和预设的第二映射关系，获取第二编码之前，判断
Figure PCTCN2015083526-appb-000044
是否大于2。
处理单元11，具体用于当
Figure PCTCN2015083526-appb-000045
不大于2时，根据所述调度载波的总数和第一映射关系，获取第一编码，并根据所述M和第二映射关系，获取第二编码。
在本发明实施例中，进一步的，处理单元11，还用于当
Figure PCTCN2015083526-appb-000046
大于2时，根据所述调度载波的总数和第一映射关系，获取第一编码，并根据所述M和预设的第三映射关系，获取第三编码；将第一编码和第三编码组合生成CAI字段。
其中，所述第三映射关系用于指示所述M对应的所述第三编码，所述第三编码的比特数小于所述第二编码的比特数。
在本发明实施例中，进一步的，当根据第一编码和第二编码生成CAI字段时，CAI字段的比特数为
Figure PCTCN2015083526-appb-000047
其中，第一编码位于CAI字段的前
Figure PCTCN2015083526-appb-000048
个比特，第二编码位于CAI字段的后
Figure PCTCN2015083526-appb-000049
个比特，或者，第一编码位于CAI字段的后
Figure PCTCN2015083526-appb-000050
个比特，第二编码位于CAI字段的前
Figure PCTCN2015083526-appb-000051
个比特。
在本发明实施例中，进一步的，当根据第一编码和第三编码生成CAI字段时，CAI字段的比特数为
Figure PCTCN2015083526-appb-000052
其中，a为大于等于2，且小于
Figure PCTCN2015083526-appb-000053
的整数。第一编码位于CAI字段的前
Figure PCTCN2015083526-appb-000054
个比特，第三编码位于CAI字段的后a个比特，或者，第一编码位于CAI字段的后
Figure PCTCN2015083526-appb-000055
个比特，第三编码位于CAI字段的前a个比特。
在本发明实施例中，进一步的，当CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，
处理单元11，具体用于获取当前调度载波的前一个调度载波的编号和后一个调度载波的编号；根据前一个调度载波的编号、后一个调度载波的编号和预设的第四映射关系，生成CAI字段。
在本发明实施例中，进一步的，所述第四映射关系用于指示所述前一个调度载波的编号对应的第四编码，以及所述后一个调度载 波的编号对应的第五编码。
处理单元11，具体用于根据前一个调度载波的编号和所述第四映射关系，获取所述第四编码，并根据所述后一个调度载波的编号和所述第四映射关系，获取所述第五编码；将所述第四编码和所述第五编码组合生成所述CAI字段。
在本发明实施例中，进一步的，所述第四映射关系用于指示所述前一个调度载波的编号、所述后一个调度载波的编号进行联合编码后对应的第六编码；所述第六编码的比特数小于所述第四编码与所述第五编码的比特数之和。
处理单元11，具体用于根据前一个调度载波的编号、后一个调度载波的编号和所述第四映射关系，获取所述第六编码，将所述第六编码作为所述CAI字段。
在本发明实施例中，进一步的，当根据第四编码和第五编码生成CAI字段时，CAI字段的比特数为
其中，第四编码位于CAI字段的前
Figure PCTCN2015083526-appb-000057
个比特，第五编码位于CAI字段的后
Figure PCTCN2015083526-appb-000058
个比特；或者，第四编码位于CAI字段的后
Figure PCTCN2015083526-appb-000059
个比特，第五编码位于CAI字段的前
Figure PCTCN2015083526-appb-000060
个比特。
在本发明实施例中，进一步的，当将第六编码作为CAI字段时，CAI字段的比特数可以为
Figure PCTCN2015083526-appb-000061
所述第六编码具体的编码方式可以参见下文图9所述的本发明的实施方式。
需要说明的是，本发明实施例中所述的基站中各功能模块的具体工作过程可以参考方法实施例中对应过程的具体描述，本发明实施例在此不再详细赘述。
本发明实施例提供的基站，在根据自身配置的所有配置载波的调度情况生成当前调度载波的CAI字段后，将生成的CAI字段携带在DCI中通过当前调度载波发送至UE。由于在本发明中，基站发送给UE的用于进行载波调度指示的CAI字段指示的是所有调度载波的总数和当前调度载波的累计索引值，或者指示的是当前调度载波的前一个调度载波的编号和后一个调度载波的编号，也就是说，本 发明中的CAI字段指示的是调度载波的调度信息，而在现有技术中，基站发送给UE的用于进行载波调度指示的DAI2字段指示的是除当前调度载波外其它所有配置载波中的每个配置载波的调度情况，且由于基站的调度载波的总数小于等于基站的配置载波的总数，因此，与现有技术相比，当基站配置的载波数较多时，基站根据本发明实施例提供的方法生成的CAI字段包含的比特数较少，这样，便减小了DCI的字段长度，从而降低了信令开销。
本发明另一实施例提供一种UE，如图2所示，该UE可以包括：接收单元21和处理单元22。
接收单元21，用于接收基站通过至少一个当前调度载波发送的携带载波分配指示CAI字段的下行控制信息DCI。
其中，CAI字段用于指示基站配置的所有配置载波中调度载波的总数和当前调度载波的累计索引值M，M表示从第一个配置载波到当前调度载波，当前调度载波是第M个被调度的载波；或者，CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号。
所述处理单元22，用于获取所述接收单元21接收到的所述DCI中的所述CAI字段，以便获知所述所有配置载波的调度情况。
在本发明实施例中，进一步的，如图3所示，所述UE还可以包括：发送单元23。
所述发送单元23，用于在所述处理单元22获取所述DCI中的所述CAI字段之后，向所述基站发送混合自动重传HARQ信息。
其中，所述HARQ信息用于反馈自身是否正确接收所述基站通过所有调度载波发送的数据，所述HARQ信息的比特数等于反馈每个所述调度载波上发送的数据是否被正确接收所需的比特数之和。
在本发明实施例中，进一步的，当CAI字段用于指示基站配置的所有配置载波中调度载波的总数和当前调度载波的累计索引值M时，
在一种可能的实现方式中，CAI字段包括第一编码和第二编码， 所述第一编码为所述基站根据所述调度载波的总数和预设的第一映射关系获得的编码，所述第一映射关系用于指示所述调度载波的总数对应的所述第一编码，所述第二编码为所述基站根据所述M和预设的第二映射关系获得的编码，所述第二映射关系用于指示所述M对应的所述第二编码。
在另一种可能的实现方式中，CAI字段包括第一编码和第三编码，所述第三编码为所述基站根据所述M和预设的第三映射关系获得的编码，所述第三映射关系用于指示所述M对应的所述第三编码。所述第三编码的比特数小于所述第二编码的比特数。
在本发明实施例中，进一步的，当CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，
在一种可能的实现方式中，CAI字段包括第四编码和第五编码；所述第四编码为所述基站根据所述前一个调度载波的编号和预设的第四映射关系获得的编码，所述第五编码为所述基站根据所述后一个调度载波的编号和所述第四映射关系获得的编码，所述第四映射关系用于指示所述前一个调度载波的编号对应的所述第四编码，以及所述后一个调度载波的编号对应的所述第五编码。
在另一种可能的实现方式中，CAI字段为第六编码；所述第六编码为所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系获得的编码，所述第四映射关系用于指示所述前一个调度载波的编号、所述后一个调度载波的编号进行联合编码后对应的所述第六编码。
在本发明实施例中，进一步的，处理单元22，还用于根据所述CAI字段，确定所述调度载波的总数，并确定所述至少一个当前调度载波的累计索引值M。
发送单元23，具体用于根据处理单元22确定出的调度载波的总数和至少一个当前调度载波的累计索引值M，向基站发送HARQ信息。
在本发明实施例中，进一步的，处理单元22，还用于根据所述 CAI字段，确定所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，并根据所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，确定调度载波的总数。
发送单元23，具体用于根据处理单元22确定出的调度载波的总数和至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，向基站发送HARQ信息。
在本发明实施例中，进一步的，当CAI字段包括第一编码和第二编码时，
处理单元22，具体用于针对CAI字段，根据第一映射关系和第一编码，获取调度载波的总数，并根据第二映射关系和第二编码，获取M。
在本发明实施例中，进一步的，当CAI字段包括第一编码和第三编码时，
处理单元22，具体用于针对CAI字段，根据第一映射关系和第一编码，获取调度载波的总数，并根据第三映射关系和第三编码，获取M。
在本发明实施例中，进一步的，当CAI字段包括第四编码和第五编码时，
处理单元22，具体用于针对CAI字段，根据第四编码和所述第四映射关系，获取所述前一个调度载波的编号，并根据所述第五编码和所述第四映射关系，获取所述后一个调度载波的编号。
在本发明实施例中，进一步的，当CAI字段为第六编码时，
处理单元22，具体用于针对CAI字段，根据所述第六编码和第四映射关系，获取前一个调度载波的编号和后一个调度载波的编号。
需要说明的是，本发明实施例中所述的UE中各功能模块的具体工作过程可以参考方法实施例中对应过程的具体描述，本发明实施例在此不再详细赘述。
本发明实施例提供的UE，接收基站通过至少一个当前调度载波 发送的携带CAI字段的DCI，并获取DCI中的CAI字段，以便获知所有配置载波的调度情况。由于在本发明中，UE接收到的CAI字段指示的是基站配置的所有配置载波中调度载波的总数和当前调度载波的累计索引值，或者指示的是当前调度载波的前一个调度载波的编号和后一个调度载波的编号，也就是说，本发明中的CAI字段指示的是调度载波的调度信息，而在现有技术中，基站发送给UE的用于进行载波调度指示的DAI2字段指示的是除当前调度载波外其它所有配置载波中的每个配置载波的调度情况，且由于基站的调度载波的总数小于等于基站的配置载波的总数，因此，与现有技术相比，当基站配置的载波数较多时，基站根据本发明实施例提供的方法生成的CAI字段包含的比特数较少，这样，便减小了DCI的字段长度，从而降低了信令开销。
并且，基于本发明实施例提供的调度载波指示，UE可以根据基站的调度载波的总数确定向基站发送的HARQ信息的比特数，由于基站的调度载波的总数小于等于基站的配置载波的总数，因此，与现有技术中的UE根据所有配置载波的总数确定向基站发送的HARQ信息的比特数相比，降低了HARQ信息的比特数，从而降低了信令开销。
本发明另一实施例提供一种载波调度指示方法，如图4所示，该方法可以包括：
S301、基站根据自身配置的所有配置载波的调度情况，生成当前调度载波的CAI字段。
其中，在一种可能的实现方式中，CAI字段用于指示所有配置载波中调度载波的总数和当前调度载波的累计索引值M，M表示从第一个配置载波到当前调度载波，所述当前调度载波是第M个被调度的载波，M为大于等于1的整数。示例性的，当当前调度载波的累计索引值为5时，表示从第一个配置载波开始，该当前调度载波是第5个被调度的载波。
在另一种可能的实现方式中，CAI字段用于指示当前调度载波 的前一个调度载波的编号和后一个调度载波的编号。
S302、基站将CAI字段携带在DCI中通过当前调度载波发送至UE。
其中，在基站根据自身配置的所有配置载波的调度情况生成当前调度载波的CAI字段后，基站将生成的CAI字段携带在DCI中，并通过当前调度载波发送至UE。
本发明实施例提供的载波调度指示方法，在基站根据自身配置的所有配置载波的调度情况生成当前调度载波的CAI字段后，将生成的CAI字段携带在DCI中通过当前调度载波发送至UE。由于在本发明中，基站发送给UE的用于进行载波调度指示的CAI字段指示的是所有调度载波的总数和当前调度载波的累计索引值，或者指示的是当前调度载波的前一个调度载波的编号和后一个调度载波的编号，也就是说，本发明中的CAI字段指示的是调度载波的调度信息，而在现有技术中，基站发送给UE的用于进行载波调度指示的DAI2字段指示的是除当前调度载波外其它所有配置载波中的每个配置载波的调度情况，且由于基站的调度载波的总数小于等于基站的配置载波的总数，因此，与现有技术相比，当基站配置的载波数较多时，基站根据本发明实施例提供的方法生成的CAI字段包含的比特数较少，这样，便减小了DCI的字段长度，从而降低了信令开销。
进一步的，在S301中，当基站生成的当前调度载波的CAI字段用于指示所有配置载波中调度载波的总数和当前调度载波的累计索引值M时，在第一种可能的实现方式中，CAI字段的具体生成过程为(即S301具体的可以为)：基站获取所有配置载波中调度载波的总数，并获取当前调度载波的累计索引值M，根据调度载波的总数和预设的第一映射关系，获取第一编码，并根据当前调度载波的累计索引M和预设的第二映射关系，获取第二编码，然后将第一编码和第二编码组合生成CAI字段。其中，第一映射关系用于指示调度载波的总数对应的第一编码，第二映射关系用于指示当前调度载 波的累计索引M对应的所述第二编码。
示例性的，第一编码可以是对所有配置载波中调度载波的总数进行二进制编码得到的，同样的，第二编码可以是对当前调度载波的累计索引值M进行二进制编码得到的。
其中，基站根据第一编码和第二编码组合生成的CAI字段的比特数为
Figure PCTCN2015083526-appb-000062
N为所有配置载波的总数，
Figure PCTCN2015083526-appb-000063
表示对log2N向上取整所得到的数值。在一种可能的实现方式中，基站获取到的第一编码位于CAI字段的前
Figure PCTCN2015083526-appb-000064
个比特，获取到的第二编码位于CAI字段的后
Figure PCTCN2015083526-appb-000065
个比特，在另一种可能的实现方式中，基站获取到的第一编码位于CAI字段的后
Figure PCTCN2015083526-appb-000066
个比特，获取到的第二编码位于CAI字段的前
Figure PCTCN2015083526-appb-000067
个比特。
进一步的，为了使得在基站的配置载波数量较多的情况下，尽量减小CAI字段的长度，在第二种可能的实现方式中，在基站根据调度载波的总数和预设的第一映射关系，获取第一编码，并根据当前调度载波的累计索引M和预设的第二映射关系，获取第二编码之前，基站可以先判断
Figure PCTCN2015083526-appb-000068
是否大于2，若基站确定
Figure PCTCN2015083526-appb-000069
不大于2，则基站在获取到所有配置载波中调度载波的总数并获取到当前调度载波的累计索引值M之后，根据调度载波的总数和预设的第一映射关系，获取第一编码，并根据当前调度载波的累计索引M和预设的第二映射关系，获取第二编码，然后将第一编码与第二编码组合生成CAI字段；若基站确定
Figure PCTCN2015083526-appb-000070
大于2，则基站在获取到所有配置载波中调度载波的总数并获取到当前调度载波的累计索引值M之后，根据调度载波的总数和预设的第一映射关系，获取第一编码，并根据当前调度载波的累计索引M和预设的第三映射关系，获取第三编码，然后将第一编码和第三编码组合生成CAI字段。第三映射关系用于指示当前调度载波的累计索引M对应的第三编码，第三编码的比特数小于第二编码的比特数。
可选地，基站根据第一编码和第三编码组合生成的CAI字段的比特数为
Figure PCTCN2015083526-appb-000071
a为大于等于2，且小于
Figure PCTCN2015083526-appb-000072
的整数。优选的， 该CAI字段的比特数可以为
Figure PCTCN2015083526-appb-000073
在一种可能的实现方式中，基站获取到的第一编码位于CAI字段的前
Figure PCTCN2015083526-appb-000074
个比特，获取到的第三编码位于CAI字段的后a个比特。在另一种可能的实现方式中，基站获取到的第一编码位于CAI字段的后
Figure PCTCN2015083526-appb-000075
个比特，获取到的第三编码位于CAI字段的前a个比特。所述第三编码具体的编码方式可以参见下文图7所述的本发明的实施方式。
进一步的，当基站生成的当前调度载波的CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，CAI字段的具体生成过程，即S301具体的可以为：基站获取当前调度载波的前一个调度载波的编号和后一个调度载波的编号，然后根据前一个调度载波的编号、后一个调度载波的编号和预设的第四映射关系，生成CAI字段。
进一步的，在第一种可能的实现方式中，第四映射关系用于指示前一个调度载波的编号对应的第四编码，以及后一个调度载波的编号对应的第五编码。也就是说，基站可以对前一个调度载波的编号和后一个调度载波的编号进行独立编码得到当前调度载波的CAI字段，这样，基站根据前一个调度载波的编号、后一个调度载波的编号和预设的第四映射关系，生成CAI字段的具体过程可以为：基站根据前一个调度载波的编号和第四映射关系，获取第四编码，并根据后一个调度载波的编号和第四映射关系，获取第五编码，然后将获取到的第四编码和第五编码组合生成CAI字段。
示例性的，第四编码可以是对所述前一个调度载波的编号进行二进制编码得到的，同样的，第五编码可以是对所述后一个调度载波的编号进行二进制编码得到的。
其中，该CAI字段的比特数可以为
Figure PCTCN2015083526-appb-000076
在一种可能的实现方式中，基站获取到的第四编码位于CAI字段的前
Figure PCTCN2015083526-appb-000077
个比特，第五编码位于CAI字段的后
Figure PCTCN2015083526-appb-000078
个比特。在另一种可能的实现方式中，基站获取到的第四编码位于CAI字段的后
Figure PCTCN2015083526-appb-000079
个比特，第五编码位于CAI字段的前
Figure PCTCN2015083526-appb-000080
个比特。
进一步的，为了能够在基站的配置载波数量较多的情况下，尽可能的减小CAI字段的长度，在第二种可能的实现方式中，第四映射关系用于指示前一个调度载波的编号、后一个调度载波的编号进行联合编码后对应的第六编码；第六编码的比特数小于第四编码与第五编码的比特数之和。也就是说，基站可以对前一个调度载波的编号和后一个调度载波的编号进行联合编码得到当前调度载波的CAI字段，这样，基站根据前一个调度载波的编号、后一个调度载波的编号和预设的第四映射关系，生成CAI字段的具体过程可以为：基站根据前一个调度载波的编号、后一个调度载波的编号和第四映射关系，获取第六编码，并将第六编码作为CAI字段。
此时，该CAI字段的比特数可以为
Figure PCTCN2015083526-appb-000081
所述第六编码具体的编码方式可以参见下文图9所述的本发明的实施方式。
本发明另一实施例提供的一种载波调度指示方法，如图5所示，该方法可以包括：
S401、UE接收基站通过至少一个当前调度载波发送的携带CAI字段的DCI。
其中，在一种可能的实现方式中，CAI字段用于指示基站配置的所有配置载波中调度载波的总数和当前调度载波的累计索引值M，M表示从第一个配置载波到当前调度载波，当前调度载波是第M个被调度的载波，M为大于等于1的整数。在另一种可能的实现方式中，CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号。
S402、UE获取DCI中的CAI字段，以便获知所有配置载波的调度情况。
其中，在UE接收到基站通过至少一个当前调度载波发送的携带CAI字段的DCI之后，可以获取接收到的所有DCI中的CAI字段，以便获取基站配置的所有配置载波的调度情况。
本发明实施例提供的载波调度指示方法，UE接收基站通过至少一个当前调度载波发送的携带CAI字段的DCI，并获取DCI中的CAI 字段，以便获知所有配置载波的调度情况。由于在本发明中，UE接收到的CAI字段指示的是基站配置的所有配置载波中调度载波的总数和当前调度载波的累计索引值，或者指示的是当前调度载波的前一个调度载波的编号和后一个调度载波的编号，也就是说，本发明中的CAI字段指示的是调度载波的调度信息，而在现有技术中，基站发送给UE的用于进行载波调度指示的DAI2字段指示的是除当前调度载波外其它所有配置载波中的每个配置载波的调度情况，且由于基站的调度载波的总数小于等于基站的配置载波的总数，因此，与现有技术相比，当基站配置的载波数较多时，基站根据本发明实施例提供的方法生成的CAI字段包含的比特数较少，这样，便减小了DCI的字段长度，从而降低了信令开销。
在UE获取到DCI中的CAI字段，获知所有配置载波的调度情况之后，UE便可以根据DCI中的CAI字段进行数据的接收。为了保证数据传输的可靠性，UE可以向基站发送HARQ信息，以反馈自身是否正确接收基站通过所有调度载波发送的数据，因此，进一步的，在执行S402之后，即在UE获取到DCI中的CAI字段之后，UE可以向基站发送HARQ信息。
其中，HARQ信息用于反馈自身是否正确接收基站通过所有调度载波发送的数据，HARQ信息的比特数等于反馈每个调度载波上发送的数据是否被正确接收所需的比特数之和。
进一步的，当UE在S401中接收的DCI中携带的CAI字段用于指示基站配置的所有配置载波中调度载波的总数和当前调度载波的累计索引值M时，在第一种可能的实现方式中，UE接收的DCI中携带的CAI字段包括第一编码和第二编码。
其中，第一编码为基站根据调度载波的总数和预设的第一映射关系获得的编码，第一映射关系用于指示调度载波的总数对应的第一编码，第二编码为基站根据M和预设的第二映射关系获得的编码，第二映射关系用于指示M对应的第二编码。
示例性的，第一编码可以是对所有配置载波中调度载波的总数 进行二进制编码得到的，同样的，第二编码可以是对当前调度载波的累计索引值M进行二进制编码得到的。
在第二种可能的实现方式中，UE接收到的DCI中携带的CAI字段包括第一编码和第三编码。
其中，第一编码为基站根据调度载波的总数和预设的第一映射关系获得的编码，第一映射关系用于指示调度载波的总数对应的第一编码，第三编码为基站根据M和预设的第三映射关系获得的编码，第三映射关系用于指示M对应的所述第三编码，其中所述第三编码的比特数小于所述第二编码的比特数。
进一步的，当UE在S401中接收的DCI中携带的CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，在第一种可能的实现方式中，UE接收的DCI中携带的CAI字段包括第四编码和第五编码。
其中，第四编码为基站根据前一个调度载波的编号和预设的第四映射关系获得的编码，第五编码为基站根据后一个调度载波的编号和第四映射关系获得的编码，第四映射关系用于指示前一个调度载波的编号对应的第四编码，以及后一个调度载波的编号对应的第五编码。
示例性的，第四编码可以是对所述前一个调度载波的编号进行二进制编码得到的，同样的，第五编码可以是对所述后一个调度载波的编号进行二进制编码得到的。
在第二种可能的实现方式中，UE接收的DCI中携带的CAI字段为第六编码。
其中，第六编码为基站根据前一个调度载波的编号、后一个调度载波的编号和预设的第四映射关系获得的编码，第四映射关系用于指示所述前一个调度载波的编号、所述后一个调度载波的编号进行联合编码后对应的第六编码。
此时，该CAI字段的比特数可以为
Figure PCTCN2015083526-appb-000082
所述第六编码具体的编码方式可以参见下文图9所述的本发明的实施方式。
进一步的，在一种可能的实现方式中，当UE在S401中接收的DCI中携带的CAI字段用于指示基站配置的所有配置载波中调度载波的总数和当前调度载波的累计索引值M时，UE向基站发送HARQ信息，具体的可以为：UE根据CAI字段，确定调度载波的总数，并确定至少一个当前调度载波的累计索引值M，然后根据调度载波的总数和至少一个当前调度载波的累计索引值M，向基站发送HARQ信息。
其中，当CAI字段包括第一编码和第二编码时，UE根据CAI字段，确定调度载波的总数，并确定至少一个当前调度载波的累计索引值M，具体的可以为：针对每个CAI字段，UE根据第一映射关系和第一编码，获取调度载波的总数，并根据第二映射关系和第二编码，获取M；当CAI字段包括第一编码和第三编码时，UE根据CAI字段，确定调度载波的总数，并确定至少一个当前调度载波的累计索引值M，具体的可以为：针对每个CAI字段，根据第一映射关系和第一编码，获取调度载波的总数，并根据第三映射关系和第三编码，获取M。
在另一种可能的实现方式中，当CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，UE向基站发送HARQ信息，具体的可以为：UE根据CAI字段，确定至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，并根据至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，确定调度载波的总数，然后根据调度载波的总数和至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，向基站发送HARQ信息。
其中，当CAI字段包括第四编码和第五编码时，UE根据CAI字段，确定至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，具体的可以为：针对每个CAI字段，UE根据第四编码和第四映射关系，获取前一个调度载波的编号，并根据第五编码和第四映射关系，获取后一个调度载波的编号；当CAI字段为 第六编码时，UE根据CAI字段，确定至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，具体的可以为：针对每个CAI字段，UE根据第六编码和第四映射关系，获取前一个调度载波的编号和后一个调度载波的编号。
可选的，本发明中的HARQ信息的比特数等于反馈每个调度载波上发送的数据是否被正确接收所需的比特数之和，即本发明中的HARQ信息的比特数是基于调度载波的总数确定出的，而现有技术中的UE向基站发送的HARQ信息的比特数是基于配置载波的总数确定出的，由于基站的调度载波的总数小于等于基站的调度载波的总数，因此，基于本发明实施例提供的调度载波指示，UE可以根据基站的调度载波的总数确定向基站发送的HARQ信息的比特数，比现有技术中的根据基站的配置载波的总数确定向基站发送的HARQ信息的比特数少，这样，便降低了UE的反馈开销。
本发明另一实施例提供一种载波调度指示方法，为了能够让UE获知基站进行的载波调度，基站可以在向UE发送的DCI中携带CAI字段，以便UE根据接收到的所有DCI中携带的CAI字段，获知基站进行的载波调度。为了便于本领域技术人员的理解，在本发明实施例中，除了第四种实施方式，以基站的所有配置载波的总数等于16，且基站调度的载波为CC0、CC2和CC5为例，并结合不同的实施方式，对本发明的具体实施过程进行详细描述，具体如下：
在第一种实施方式中，如图6所示，该方法可以包括：
S501、基站获取所有配置载波中调度载波的总数，并获取当前调度载波的累计索引值M。
其中，M表示从第一个配置载波到当前调度载波，当前调度载波是第M个被调度的载波。示例性的，基站调度的载波为CC0、CC2和CC5，因此，基站获取到的调度载波的总数为3，当前调度载波CC0的累计索引值为1，当前调度载波CC2的累计索引值为2，当前调度载波CC5的累计索引值为3。
S502、基站根据调度载波的总数和预设的第一映射关系，获取 第一编码，并根据当前调度载波的累计索引值M和预设的第二映射关系，获取第二编码。
其中，第一映射关系用于指示调度载波的总数对应的第一编码，第二映射关系用于指示M对应的所述第二编码。
示例性的，当基站的配置载波的数量等于16时，基站中预设的第一映射关系可以如表1所示，预设的第二映射关系可以如表2所示，针对CC0来说，基站根据获取到的调度载波的总数(所述的调度载波的总数等于3)，查询表1，获取第一编码为0010，并根据获取到的当前调度载波CC0的累计索引值(所述CC0的累计索引值等于1)，查询表2，获取第二编码为0000；针对CC2来说，基站获取到的第一编码为0010，并根据获取到的当前调度载波CC2的累计索引值(所述CC2的累计索引值等于2)，查询表2，获取第二编码为0001；针对CC5来说，基站获取到的第一编码为0010，并根据获取到的当前调度载波CC5的累计索引值(所述CC5的累计索引值等于3)，查询表2，获取第二编码为0010。
需要说明的是，在本发明实施例中，针对每个当前调度载波，基站可以只获取一次第一编码，然后分别获取每个当前调度载波的第二编码即可。
表1
调度载波的总数 第一编码
1 0000
2 0001
3 0010
4 0011
5 0100
6 0101
7 0110
8 0111
9 1000
10 1001
11 1010
12 1011
13 1100
14 1101
15 1110
16 1111
表2
当前调度载波的累计索引值 第二编码
1 0000
2 0001
3 0010
4 0011
5 0100
6 0101
7 0110
8 0111
9 1000
10 1001
11 1010
12 1011
13 1100
14 1101
15 1110
16 1111
需要说明的是，本发明实施例表1、表2中包含的数值只是一种示例，本发明实施例在此并未对表1中的与调度载波的总数对应的第一编码的具体取值，也即编码方式，进行限制，以及表2中的与当前调度载波的累计索引值对应的第二编码的具体取值，也即编码方式，进行限制，与调度载波的总数对应的第一编码和与当前调度载波的累计索引值对应的第二编码的具体取值可以根据实际场景的需要进行相应的设置。
S503、基站将第一编码和第二编码组合生成CAI字段。
其中，CAI字段用于指示所有配置载波中调度载波的总数和当前调度载波的累计索引值，根据S502中的例子，由于基站的所有配置载波的总数等于16，CAI字段的比特数可以为
Figure PCTCN2015083526-appb-000083
这样，基站生成的CAI字段的比特数为8。并且，生成的CAI字段中，在 第一种可能的实现方式中，第一编码位于CAI字段的前4个比特，第二编码位于CAI字段的后4个比特，在第二种可能的实现方式中，第一编码位于CAI字段的后4个比特，第二编码位于CAI字段的前4个比特。
示例性的，针对CC0来说，基站根据第一种可能的实现方式生成的CC0的CAI字段为00100000，基站根据第二种可能的实现方式生成的CC0的CAI字段为00000010；针对CC2来说，基站根据第一种可能的实现方式生成的CC2的CAI字段为00100001，基站根据第二种可能的实现方式生成的CC2的CAI字段为00010010；针对CC5来说，基站根据第一种可能的实现方式生成的CC5的CAI字段为00100010，基站根据第二种可能的实现方式生成的CC5的CAI字段为00100010。
S504、基站将CAI字段携带在DCI中通过当前调度载波发送至UE。
其中，基站可以将生成的CC0的CAI字段携带在DCI中通过CC0发送至UE，可以将生成的CC2的CAI字段携带在DCI中通过CC2发送至UE，可以将生成的CC5的CAI字段携带在DCI中通过CC5发送至UE。
S505、UE接收基站通过至少一个当前调度载波发送的携带CAI字段的DCI，并获取DCI中的CAI字段，以便获知所有配置载波的调度情况。
其中，CAI字段用于指示基站配置的所有配置载波中调度载波的总数和当前调度载波的累计索引值M，包括第一编码和第二编码。根据本发明实施例的示例，在一种可能的实现方式中，CAI字段的前4个比特为第一编码，后4个比特为第二编码。在另一种可能的实现方式中，CAI字段的前4个比特为第二编码，后4个比特为第一编码。
在UE通过所述CC0、CC2和CC5接收到基站发送的DCI，并获取到每个DCI中的CAI字段，便可结合每个CAI字段中的信息获 知所有配置载波的调度情况。之后，UE便可以根据DCI进行数据的接收，可选地，为了保证数据传输的可靠性，UE可以向基站发送HARQ信息，以反馈自身是否正确接收基站通过所有调度载波发送的数据，因此，在S505之后，该方法还可以包括S506-S507。
S506、UE根据CAI字段，确定调度载波的总数，并确定至少一个当前调度载波的累计索引值M。
其中，S506具体的可以为：针对获得的每个CAI字段，UE根据第一映射关系和第一编码，获取调度载波的总数，并根据第二映射关系和第二编码，获取M。
示例性的，当基站中预设的第一映射关系如表1所示时，UE中预设的第一映射关系也如表1所示，当基站中预设的第二映射关系如表2所示时，UE中预设的第二映射关系也如表2所示。当CAI字段的前4个比特为第一编码，后4个比特为第二编码时，若UE通过CC0接收到的DCI，且DCI中携带的CAI字段为00100000，则UE根据第一编码0010，查询表1，获取调度载波的总数为3，根据第二编码0000，查询表2，获取当前调度载波CC0的累计索引值为1，同样的，若UE通过CC2接收到DCI，且DCI中携带的CAI字段为00100001，则UE可以获取调度载波的总数为3，并获取当前调度载波CC5的累计索引值为2；若UE通过CC5接收到DCI，且DCI中携带的CAI字段为00100010，则UE可以获取调度载波的总数为3，并获取当前调度载波CC5的累计索引值为3。
S507、UE根据调度载波的总数和至少一个当前调度载波的累计索引值M，向基站发送HARQ信息。
其中，HARQ信息的比特数可以等于反馈每个所述调度载波上发送的数据是否被正确接收所需的比特数之和。
在获知了调度载波的总数和至少一个当前调度载波的累积索引值M后，UE便可结合每个CAI字段中这些信息获知所有配置载波的调度情况，这样再结合实际在每个所述调度载波上发送的数据接收情况，UE就能向基站发送HARQ信息。
需要说明的是，在本发明实施例中，UE可以通过主载波向基站发送HARQ信息，也可以通过主载波和一个辅载波向基站发送HARQ信息，本发明实施例在此对发送HARQ信息采用的载波并不做具体限制，具体的发送HARQ信息采用的载波可以根据实际应用场景的需求进行选择。
示例性的，当用于反馈每个调度载波上发送的数据是否被正确接收所需的比特数为1时，以“1”表示UE正确接收数据，“0”表示UE未正确接收数据为例，当UE分别通过CC0和CC5接收到DCI时，UE可以获知基站分别通过CC0和CC5进行数据传输，且可以获知基站的调度载波的总数等于3，CC0的累计索引值为1，CC5的累计索引值为3，若UE只正确接收基站通过CC0发送的数据，则UE向基站发送的HARQ信息为100，以指示自身已正确接收基站通过累计索引值为1的当前调度载波发送的数据，未正确接收基站通过累计索引值为2和累计索引值为3的调度载波发送的数据。在基站接收到UE发送的HARQ信息之后，基站可以通过累计索引值为2和累计索引值为3的调度载波重新向UE发送DCI和数据中的至少一种。
从上述可以看出，当用于反馈每个调度载波上发送的数据是否被正确接收所需的比特数为1时，HARQ信息的比特数与基站的调度载波的总数相等，而现有技术中的UE向基站发送的HARQ信息的比特数与基站的配置载波的总数相等，由于基站的调度载波的总数小于等于基站的调度载波的总数，因此，基于本发明实施例提供的调度载波指示，UE可以根据基站的调度载波的总数确定向基站发送的HARQ信息的比特数，比现有技术中的根据基站的配置载波的总数确定向基站发送的HARQ信息的比特数少，这样，便降低了UE的反馈开销。
进一步的，当基站与UE之间采用时分双工(英文：Time Division Duplexing，简称：TDD)模式进行数据传输时，UE仅可以采用物理上行链路控制信道格式3(英文：Physical Uplink Control Channel  format 3，简称：PUCCH format 3)向基站发送HARQ信息，但是PUCCH format 3支持的最大反馈比特数为20，这样，在基站配置的载波总数较多(即配置载波的总数较多)的情况下，若采用现有技术中根据基站的配置载波的总数确定向基站发送的HARQ信息，那么反馈的HARQ信息的比特数会大于20，导致HARQ信息发送失败，但是若UE根据本发明提供的载波调度指示方法向基站发送HARQ信息时，UE根据基站的调度载波的总数确定向基站发送的HARQ信息的比特数大于20的概率将会大大降低，因此，UE可以采用PUCCH format 3向基站发送HARQ信息。
在第二种实施方式中，如图7所示，该方法可以包括：
S601、基站获取所有配置载波中调度载波的总数，并获取当前调度载波的累计索引值M。
S602、基站判断
Figure PCTCN2015083526-appb-000084
是否大于2。
其中，在基站获取到调度载波的总数和当前调度载波的累计索引值M之后，为了能够在基站的配置载波的总数较多的情况下，尽可能的减小CAI字段的比特数，基站可以先判断
Figure PCTCN2015083526-appb-000085
是否大于2，当确定
Figure PCTCN2015083526-appb-000086
不大于2时，执行S603-S604，当确定
Figure PCTCN2015083526-appb-000087
大于2时，执行S605-S606。假设基站的配置载波的总数N等于16，基于此，基站可以确定出
Figure PCTCN2015083526-appb-000088
大于2，即基站在执行S602之后，继续执行S605-S606。
S603、基站根据调度载波的总数和预设的第一映射关系，获取第一编码，并根据当前调度载波的累计索引值M和预设的第二映射关系，获取第二编码。
其中，第一映射关系用于指示调度载波的总数对应的第一编码，第二映射关系用于指示M对应的所述第二编码。
所述第一编码和所述第二编码的比特数可以为
Figure PCTCN2015083526-appb-000089
S604、基站将第一编码和第二编码组合生成CAI字段。
S605、基站根据调度载波的总数和预设的第一映射关系，获取第一编码，并根据当前调度载波的累计索引值M和预设的第三映射 关系，获取第三编码。
其中，第三映射关系用于指示当前调度载波的累计索引值M对应的第三编码，第三编码的比特数小于第二编码的比特数。在第三映射关系中，由于多个不同的M可以对应同一个第三编码，这样，第三编码的比特数便可以小于第二编码的比特数，即第三编码的比特数小于
Figure PCTCN2015083526-appb-000090
示例性的，当基站的配置载波的数量等于16时，为了能够在基站的配置载波的总数较多的情况下，尽可能的减小CAI字段的比特数，第三编码的比特数可以小于
Figure PCTCN2015083526-appb-000091
也就是说，第三编码的比特数可以为2或3，以第三编码的比特数是2为例，基站中预设的第三映射关系可以如表3所示，从表3可以看出，当M分别等于1、5、9、13时，对应的第三编码均为00，即第三编码的比特数为2，针对CC0来说，基站根据获取到的调度载波的总数(例如，所述调度载波的总数等于3)，查询表1，获取第一编码为0010，并根据获取到的当前调度载波CC0的累计索引值(所述CC0的累计索引值等于1)，查询表3，获取第三编码为00；针对CC2来说，基站获取到的第一编码为0010，并根据获取到的当前调度载波CC2的累计索引值(所述CC2的累计索引值等于2)，查询表3，获取第三编码为01；针对CC5来说，基站获取到的第一编码为0010，并根据获取到的当前调度载波CC5的累计索引值(所述CC5的累计索引值等于3)，查询表3，获取第三编码为10。
需要说明的是，在本发明实施例中，针对每个当前调度载波，基站可以只获取一次第一编码，然后分别获取每个当前调度载波的第二编码即可。
表3
当前调度载波的累计索引值 第三编码
1或5或9或13 00
2或6或10或14 01
3或7或11或15 10
4或8或12或16 11
需要说明的是，本发明实施例表3中包含的数值只是一种示例，本发明实施例在此并未对表3中的与当前调度载波的累计索引值对应的第三编码的具体取值进行限制，与当前调度载波的累计索引值对应的第二编码的具体取值可以根据实际场景的需要进行相应的设置。
S606、基站将第一编码和第三编码组合生成CAI字段。
其中，CAI字段用于指示所有配置载波中调度载波的总数和当前调度载波的累计索引值，根据本发明实施例的示例，由于基站的所有配置载波的总数等于16，根据CAI字段的比特数为
Figure PCTCN2015083526-appb-000092
(此处a＝2)可以得出，基站生成的CAI字段的比特数为6。并且，生成的CAI字段中，在第一种可能的实现方式中，第一编码位于CAI字段的前4个比特，第三编码位于CAI字段的后2个比特，在第二种可能的实现方式中，第一编码位于CAI字段的后4个比特，第三编码位于CAI字段的前2个比特。
示例性的，针对CC0来说，基站根据第一种可能的实现方式生成的CC0的CAI字段为001000，基站根据第二种可能的实现方式生成的CC0的CAI字段为000010；针对CC2来说，基站根据第一种可能的实现方式生成的CC2的CAI字段为001001，基站根据第二种可能的实现方式生成的CC2的CAI字段为010010；针对CC5来说，基站根据第一种可能的实现方式生成的CC5的CAI字段为001010，基站根据第二种可能的实现方式生成的CC5的CAI字段为100010。
S607、基站将CAI字段携带在DCI中通过当前调度载波发送至UE。
其中，S601-S604、S607的描述可以参照S501-S504的描述，此处不再赘述。
其中，从本发明上一实施例中的S502-S503和本发明实施例中的S605-S606中的描述可以看出，当
Figure PCTCN2015083526-appb-000093
大于2时，基站根据第三映射关系获取到的第三编码，比基站根据第二映射关系获取到的第二编码的比特数少，这样，基站根据第一编码和第三编码组合生成 的CAI字段的比特数比基站根据第一编码和第二编码组合生成的CAI字段的比特数少。即，当
Figure PCTCN2015083526-appb-000094
之于2时，优选的，基站根据第一编码和第三编码组合生成CAI字段，这样，便可以进一步减少DCI的字段长度，从而降低信令开销。
S608、UE接收基站通过至少一个当前调度载波发送的携带CAI字段的DCI，并获取DCI中的CAI字段，以便获知所有配置载波的调度情况。
其中，CAI字段用于指示基站配置的所有配置载波中调度载波的总数和当前调度载波的累计索引值M，可以包括第一编码和第二编码，也可以包括第一编码和第三编码。
当CAI字段包括第一编码和第二编码时，根据S605-S606中的例子，在一种可能的实现方式中，CAI字段的前4个比特为第一编码，后2个比特为第二编码。在另一种可能的实现方式中，CAI字段的前2个比特为第二编码，后4个比特为第一编码。
当CAI字段包括第一编码和第三编码时，根据本发明实施例的示例，在一种可能的实现方式中，CAI字段的前4个比特为第一编码，后2个比特为第三编码。在另一种可能的实现方式中，CAI字段的前2个比特为第三编码，后4个比特为第一编码。
在UE接收到基站发送的DCI，并获取到DCI中的CAI字段，获知所有配置载波的调度情况之后，UE便可以根据DCI进行数据的接收，可选地，为了保证数据传输的可靠性，UE可以向基站发送HARQ信息，以反馈自身是否正确接收基站通过所有调度载波发送的数据，因此，在S608之后，该方法还包括S609-S610。
S609、UE根据CAI字段，确定调度载波的总数，并确定至少一个当前调度载波的累计索引值M。
其中，当CAI字段包括第一编码和第三编码时，S609具体的可以为：针对每个CAI字段，根据第一映射关系和第一编码，获取调度载波的总数，并根据第三映射关系和第三编码，获取M。
示例性的，当基站中预设的第一映射关系如表1所示时，UE 中预设的第一映射关系也如表1所述，当基站中预设的第三映射关系如表3所示时，UE中预设的第三映射关系也如表3所示。当CAI字段的前4个比特为第一编码，后2个比特为第三编码时，若UE通过CC0接收到的DCI，且DCI中携带的CAI字段为001000，则UE根据第一编码0010，查询表1，获取调度载波的总数为3，根据第三编码00，查询表2，获取到与第三编码00对应的累计索引值为1、5、9以及13，由于携带该CAI字段的DCI是UE通过当前调度载波CC0接收到的，因此，UE可以获取当前调度载波CC0的累计索引值为1。同样的，若UE通过CC2接收到DCI，且DCI中携带的CAI字段为001001时，UE可以获取调度载波的总数为3，并可以获取当前调度载波CC2的累计索引值为2；若UE通过CC5接收到DCI，且DCI中携带的CAI字段为001010时，UE可以获取调度载波的总数为3，并可以获取当前调度载波CC5的累计索引值为3。
需要说明的是，当CAI字段包括第一编码和第二编码时，UE根据CAI字段，确定调度载波的总数，并确定至少一个当前调度载波的累计索引值M的过程可以参照上述实施例中S506的具体描述，本发明实施例在此不再赘述。
S610、UE根据调度载波的总数和至少一个当前调度载波的累计索引值M，向基站发送HARQ信息。
其中，HARQ信息的比特数等于反馈每个所述调度载波上发送的数据是否被正确接收所需的比特数之和。S610的描述可以参照S507的描述，此处不再赘述。
需要说明的是，本发明实施例S601-S610中具体的描述可以参照S501-S507中的描述，本发明实施例在此不再赘述。
在第三种实施方式中，如图8所示，该方法可以包括：
S701、基站获取当前调度载波的前一个调度载波的编号和后一个调度载波的编号。
其中，例如，基站调度的载波为CC0、CC2和CC5，因此，针对CC0来说，前一个调度载波的编号为5，后一个调度载波的编号 为2；针对CC2来说，前一个调度载波的编号为0，后一个调度载波的编号为5；针对CC5来说，前一个调度载波的编号为2，后一个调度载波的编号为0。
示例性地，当基站的配置载波中仅有一个载波被调度时，例如基站的配置载波的总数为16，且调度的载波为CC5，那么针对CC5来说，前一个调度载波的编号为5，后一个调度载波的编号也为5。
当基站的配置载波中有两个载波被调度时，例如基站的配置载波的总数为16，且调度的载波为CC5和CC8，那么，针对CC5来说，前一个调度载波的编号为8，后一个调度载波的编号也为8，针对CC8来说，前一个调度载波的编号为5，后一个调度载波的编号也为5。
S702、基站根据前一个调度载波的编号和第四映射关系，获取第四编码，并根据后一个调度载波的编号和第四映射关系，获取第五编码。
其中，第四映射关系用于指示前一个调度载波的编号对应的第四编码，以及后一个调度载波的编号对应的第五编码。
示例性的，预设的第四映射关系可以如表4所示，在基站获取到当前调度载波的前一个调度载波的编号和后一个调度载波的编号之后，可以根据前一个调度载波的编号，查询表4，获取第四编码，并根据后一个调度载波的编号，查询表4，获取第五编码。
表4
调度载波的编号 第四编码
1 0000
2 0001
3 0010
4 0011
5 0100
6 0101
7 0110
8 0111
9 1000
10 1001
11 1010
12 1011
13 1100
14 1101
15 1110
16 1111
需要说明的是，本发明实施例表4中包含的数值只是一种示例，本发明实施例在此并未对表4中的与调度载波的编号对应的编码的具体取值进行限制，与调度载波的编号对应的编码的具体取值可以根据实际场景的需要进行相应的设置。
当然，第四编码可以是对前一个调度载波的编号进行二进制编码得到的，第五编码可以是对后一个调度载波的编号进行二进制编码得到的，这样在基站获取到当前调度载波的前一个调度载波的编号和后一个调度载波的编号之后，可以直接对前一个调度载波的编号进行二进制编码得到第四编码，对后一个调度载波的编号进行二进制编码得到第五编码。示例性的，当基站配置的载波数量等于16时，前一个调度载波的编码比特数和后一个调度载波的编码比特数为4。例如，针对当前调度载波CC0来说，基站获取CC0的前一个 调度载波的编号5的二进制编码为0101，后一个调度载波的编号2的二进制编码为0010；针对当前调度载波CC2来说，基站获取CC2的前一个调度载波的编号0的二进制编码为0000，后一个调度载波的编号5的二进制编码为0101；针对当前调度载波CC5来说，基站获取CC5的前一个调度载波的编号2的二进制编码为0010，后一个调度载波的编号0的二进制编码为0000。
S703、基站将第四编码和第五编码组合生成CAI字段。
其中，CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号，根据本发明实施例的示例，基站的所有配置载波的总数等于16，CAI字段的比特数可以为
Figure PCTCN2015083526-appb-000095
这样，基站生成的CAI字段的比特数为8。并且，生成的CAI字段中，在第一种可能的实现方式中，第四编码位于CAI字段的前4个比特，第五编码位于CAI字段的后4个比特，在第二种可能的实现方式中，第五编码位于CAI字段的前4个比特，第四编码位于CAI字段的后4个比特。
示例性的，基站根据第一种可能的实现方式生成的每个当前调度载波对应的CAI字段可以如表5所示，基站根据第二种可能的实现方式生成的每个当前调度载波对应的CAI字段可以如表6所示。
表5
Figure PCTCN2015083526-appb-000096
表6
Figure PCTCN2015083526-appb-000097
S704、基站将CAI字段携带在DCI中通过当前调度载波发送至UE。
S705、UE接收基站通过至少一个当前调度载波发送的携带CAI字段的DCI，并获取DCI中的CAI字段，以便获知所有配置载波的调度情况。
其中，CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号，包括第四编码和第五编码。根据本发明实施例的示例，在一种可能的实现方式中，CAI字段的前4个比特为第四编码，CAI字段的后4个比特为第五编码。在另一种可能的实现方式中，CAI字段的前4个比特为第五编码，CAI字段的后4个比特为第四编码。
在UE接收到基站发送的DCI之后，UE便可以根据DCI进行数据的接收，可选地，为了保证数据传输的可靠性，UE可以向基站发送HARQ信息，以反馈自身是否正确接收基站通过所有调度载波发送的数据，因此，在S705之后，该方法还包括S706-S708。
S706、UE根据CAI字段，确定至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号。
其中，S706具体的可以为：针对每个CAI字段，UE根据第四编码和第四映射关系，获取前一个调度载波的编号，并根据第五编码和第四映射关系，获取后一个调度载波的编号。
示例性的，当基站中预设的第四映射关系如表4所示时，UE中预设的第四映射关系也如表4所示，当CAI字段的前4个比特为第四编码，后4个比特为第五编码时，若UE通过CC0接收到DCI，且DCI中携带的CAI字段为01010010，则UE根据第四编码，即CAI字段的前4个比特的编码0101，可以获取当前调度载波CC0的前一个调度载波的编号为5，根据第五编码，即CAI字段的后4个比特的编码0010，可以获取当前调度载波CC0的后一个调度载波的编号为2，同样的，若UE通过CC2接收到DCI，且DCI中携带的CAI字段为00000101，则UE根据第四编码，即CAI字段的前4个 比特的编码0000，可以获取当前调度载波CC2的前一个调度载波的编号为0，根据第五编码，即CAI字段的后4个比特的编码0101，可以获取当前调度载波CC2的后一个调度载波的编号为5；若UE通过CC5接收到DCI，且DCI中携带的CAI字段为00100000，则UE根据第四编码，即CAI字段的前4个比特的编码0010，可以获取当前调度载波CC5的前一个调度载波的编号为2，根据第五编码，即CAI字段的后4个比特的编码0000，可以获取当前调度载波CC5的后一个调度载波的编号为0。
S707、UE根据至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，确定调度载波的总数。
其中，在UE根据CAI字段，确定至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号之后，UE便可以根据至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，确定调度载波的总数。
示例性的，由于UE获取到CC0的前一个调度载波的编号为5，后一个调度载波的编号为2，获取到CC2的前一个调度载波的编号为0，后一个调度载波的编号为5，获取到CC5的前一个调度载波的编号为2，后一个调度载波的编号为0，因此，UE可以确定基站的调度载波分别为CC0、CC2以及CC5，也就是说，UE可以确定基站的调度载波的总数为3。
S708、UE根据调度载波的总数和至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，向基站发送HARQ信息。
其中，HARQ信息的比特数等于反馈每个所述调度载波上发送的数据是否被正确接收所需的比特数之和。在UE获取到调度载波的总数和至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号之后，UE便可以根据调度载波的总数和至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，向基站发送HARQ信息，以反馈自身是否正确接收基站通过所有调度 载波发送的数据。
需要说明的是，在本发明实施例中，UE可以通过主载波向基站发送HARQ信息，也可以通过主载波和一个辅载波向基站发送HARQ信息，本发明实施例在此对发送HARQ信息采用的载波并不做具体限制，具体的发送HARQ信息采用的载波可以根据实际应用场景的需求进行选择。
示例性的，当用于反馈每个调度载波上发送的数据是否被正确接收所需的比特数为1时，以“1”表示UE正确接收数据，“0”表示UE未正确接收数据为例，当UE分别通过CC0和CC5接收到DCI时，UE可以获知基站分别通过CC0和CC5进行数据传输，且可以获知基站的调度载波分别为CC0、CC2和CC5，也就是说，UE可以获知基站的调度载波的总数为3，这样，UE可以确定向基站发送的HARQ信息的比特数为3，若UE只正确接收基站通过CC0发送的数据，则UE向基站发送的HARQ信息为100，以指示自身已正确接收基站通过当前调度载波CC0发送的数据，未正确接收基站通过当前调度载波CC2和当前调度载波CC5发送的数据。在基站接收到UE发送的HARQ信息之后，基站重新向UE发送通过当前调度载波CC2和当前调度载波CC5进行发送的数据。
需要说明的是，本发明实施例S701-S708中具体的描述可以参照S501-S507中的描述，本发明实施例在此不再赘述。
在第四种实施方式下，为了便于本领域技术人员的理解，以基站的所有配置载波的总数等于8，且基站调度的载波为CC4和CC5为例介绍本发明实施例提供的载波调度指示方法，如图9所示，该方法可以包括：
S801、基站获取当前调度载波的前一个调度载波的编号和后一个调度载波的编号。
其中，例如，基站调度的载波为CC4和CC5，因此，针对CC4来说，前一个调度载波的编号为5，后一个调度载波的编号也为5；针对CC5来说，前一个调度载波的编号为4，后一个调度载波的编 号也为4。
S802、基站根据前一个调度载波的编号、后一个调度载波的编号和第四映射关系，获取第六编码，并将第六编码作为CAI字段。
其中，在基站获取到的当前调度载波的前一个调度载波的编号和后一个调度载波的编号之后，基站可以根根据前一个调度载波的编号、后一个调度载波的编号和第四映射关系，获取第六编码，并将第六编码作为CAI字段，由于基站的配置载波的总数等于8，且CAI字段的比特数可以为
Figure PCTCN2015083526-appb-000098
可以得出，基站生成的CAI字段包含的比特数为5。
基站可以将一个调度载波对应的第四映射关系放在一个单独的表中配置在基站中，示例性的，针对当前调度载波CC4来说，与CC4对应的第四映射关系如表7所示，基站根据获取到CC4的前一个调度载波的编号，即5和后一个调度载波的编号，即5，查询表7，得到第六编码为01111，并将得到的第六编码01111作为CC4的CAI字段。同样的，针对当前调度载波CC5来说，可以根据获取到CC5的前一个调度载波的编号，即4和后一个调度载波的编号，即4，查询与CC5对应的第四映射关系，得到第六编码，并将得到的第六编码作为CC5的CAI字段。基站也可以将所有调度载波对应的第四映射关系放在一个共同的表中配置在基站中。
表7
前一个调度载波的编号 后一个调度载波的编号 CAI字段
0 0 00000
1 0 00001
2 0 00010
3 0 00011
1 1 00100
2 1 00101
3 1 00110
2 2 00111
3 2 01000
3 3 01001
4 4 01010
0 5 01011
1 5 01100
2 5 01101
3 5 01110
5 5 01111
6 5 10000
7 5 10001
0 6 10010
1 6 10011
2 6 10100
3 6 10101
6 6 10110
7 6 10111
0 7 11000
1 7 11001
2 7 11010
3 7 11011
7 7 11100
预留 预留 11101
预留 预留 11110
预留 预留 11111
需要说明的是，本发明实施例表7中包含的数值只是一种示例， 本发明实施例在此并未对表7中的与前一个调度载波的编号和后一个调度载波的编号对应的编码的具体取值以及预留的具体编码进行限制，与前一个调度载波的编号和后一个调度载波的编号对应的编码的具体取值以及预留的具体编码可以根据实际场景的需要进行相应的设置。
S803、基站将CAI字段携带在DCI中通过当前调度载波发送至UE。
S804、UE接收基站通过至少一个当前调度载波发送的携带CAI字段的DCI，并获取DCI中的CAI字段，以便获知所有配置载波的调度情况。
其中，CAI字段为第六编码，用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号。
在UE接收到基站发送的DCI之后，UE便可以根据DCI进行数据的接收，可选地，为了保证数据传输的可靠性，UE可以向基站发送HARQ信息，以反馈自身是否正确接收基站通过所有调度载波发送的数据，因此，在S804之后，该方法还包括S805-S807。
S805、UE根据CAI字段，确定至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号。
其中，S805具体的可以为：针对每个CAI字段，UE根据第六编码和第四映射关系，获取前一个调度载波的编号和后一个调度载波的编号。
示例性的，若UE通过CC4接收到DCI，且DCI中包含的CAI字段为01111，则UE根据第六编码01111，查询与CC4对应的第四映射关系如表7，获取CC4的前一个调度载波的编号为5，后一个调度载波的编号也为5。同样的，若UE通过CC4接收到DCI，则UE也可以根据DCI中携带的CAI字段，查询与CC5对应的第四映射关系，获取CC5的前一个调度载波的编号为4，后一个调度载波的编号为4。
S806、UE根据至少一个当前调度载波的前一个调度载波的编号 和后一个调度载波的编号，确定调度载波的总数。
S807、UE根据调度载波的总数和至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，向基站发送HARQ信息。
需要说明的是，本发明实施例S801-S807中具体的描述可以参照S701-S708中的描述，本发明实施例在此不再赘述。
本发明实施例提供的载波调度指示方法，在基站根据自身配置的所有配置载波的调度情况生成当前调度载波的CAI字段后，并将生成的CAI字段携带在DCI中通过当前调度载波发送至UE，以便UE根据DCI中的CAI字段，获知所有配置载波的调度情况。由于在本发明中，基站发送给UE的用于进行载波调度指示的CAI字段指示的是所有调度载波的总数和当前调度载波的累计索引值，或者指示的是当前调度载波的前一个调度载波的编号和后一个调度载波的编号，也就是说，本发明中的CAI字段指示的是调度载波的调度信息，而在现有技术中，基站发送给UE的用于进行载波调度指示的DAI2字段指示的是除当前调度载波外其它所有配置载波中的每个配置载波的调度情况，且由于基站的调度载波的总数小于等于基站的配置载波的总数，因此，与现有技术相比，当基站配置的载波数较多时，基站根据本发明实施例提供的方法生成的CAI字段包含的比特数较少，这样，便减小了DCI的字段长度，从而降低了信令开销。
并且，基于本发明实施例提供的调度载波指示，UE可以根据基站的调度载波的总数确定向基站发送的HARQ信息的比特数，由于基站的调度载波的总数小于等于基站的配置载波的总数，因此，与现有技术中的UE根据所有配置载波的总数确定向基站发送的HARQ信息的比特数相比，降低了HARQ信息的比特数，从而降低了信令开销。
本发明一实施例提供一种基站，如图10所示，该基站包括：处理器91和发送器92。
处理器91，用于根据配置的所有配置载波的调度情况，生成当前调度载波的CAI字段。
其中，CAI字段用于指示所有配置载波中调度载波的总数和当前调度载波的累计索引值M，M表示从第一个配置载波到当前调度载波，当前调度载波是第M个被调度的载波；或者，CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号。
发送器92，用于将处理器91生成的CAI字段携带在DCI中通过当前调度载波发送至UE。
其中，M为大于等于1的整数。
在本发明实施例中，进一步的，当CAI字段用于指示所有配置载波中调度载波的总数和当前调度载波的累计索引值M时，
处理器91，具体用于获取调度载波的总数，并获取M；根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码；将第一编码和第二编码组合生成CAI字段。
其中，所述第一映射关系用于指示所述调度载波的总数对应的所述第一编码，所述第二映射关系用于指示所述M对应的所述第二编码。
可选的，所述第一编码的比特数为
Figure PCTCN2015083526-appb-000099
所述第二编码的比特数为
Figure PCTCN2015083526-appb-000100
其中，所述N为所有所述配置载波的总数；
Figure PCTCN2015083526-appb-000101
表示对log2N向上取整所得到的数值。
在本发明实施例中，进一步的，处理器91，还用于在根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码之前，判断
Figure PCTCN2015083526-appb-000102
是否大于2。
处理器91，具体用于当
Figure PCTCN2015083526-appb-000103
不大于2时，根据所述调度载波的总数和第一映射关系，获取第一编码，并根据所述M和第二映射 关系，获取第二编码。
在本发明实施例中，进一步的，处理器91，还用于当
Figure PCTCN2015083526-appb-000104
大于2时，根据所述调度载波的总数和第一映射关系，获取第一编码，并根据所述M和预设的第三映射关系，获取第三编码；将第一编码和第三编码组合生成CAI字段。
其中，所述第三映射关系用于指示所述M对应的所述第三编码，所述第三编码的比特数小于所述第二编码的比特数。
在本发明实施例中，进一步的，当根据第一编码和第二编码生成CAI字段时，CAI字段的比特数为
Figure PCTCN2015083526-appb-000105
其中，第一编码位于CAI字段的前
Figure PCTCN2015083526-appb-000106
个比特，第二编码位于CAI字段的后
Figure PCTCN2015083526-appb-000107
个比特，或者，第一编码位于CAI字段的后
Figure PCTCN2015083526-appb-000108
个比特，第二编码位于CAI字段的前
Figure PCTCN2015083526-appb-000109
个比特。
在本发明实施例中，进一步的，当根据第一编码和第三编码生成CAI字段时，CAI字段的比特数为
Figure PCTCN2015083526-appb-000110
其中，a为大于等于2，且小于
Figure PCTCN2015083526-appb-000111
的整数。第一编码位于CAI字段的前
Figure PCTCN2015083526-appb-000112
个比特，第三编码位于CAI字段的后a个比特，或者，第一编码位于CAI字段的后
Figure PCTCN2015083526-appb-000113
个比特，第三编码位于CAI字段的前a个比特。
在本发明实施例中，进一步的，当CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，
处理器91，具体用于获取当前调度载波的前一个调度载波的编号和后一个调度载波的编号；根据前一个调度载波的编号、后一个调度载波的编号和预设的第四映射关系，生成CAI字段。
在本发明实施例中，进一步的，所述第四映射关系用于指示所述前一个调度载波的编号对应的第四编码，以及所述后一个调度载波的编号对应的第五编码。
处理器91，具体用于根据所述前一个调度载波的编号和所述第四映射关系，获取所述第四编码，并根据所述后一个调度载波的编号和所述第四映射关系，获取所述第五编码；将所述第四编码和所 述第五编码组合生成所述CAI字段。
在本发明实施例中，进一步的，所述第四映射关系用于指示所述前一个调度载波的编号、所述后一个调度载波的编号进行联合编码后对应的第六编码；所述第六编码的比特数小于所述第四编码与所述第五编码的比特数之和。
处理器91，具体用于根据所述前一个调度载波的编号、所述后一个调度载波的编号和所述第四映射关系，获取所述第六编码，将所述第六编码作为所述CAI字段。
在本发明实施例中，进一步的，当根据第四编码和第五编码生成CAI字段时，CAI字段的比特数为
Figure PCTCN2015083526-appb-000114
其中，第四编码位于CAI字段的前
Figure PCTCN2015083526-appb-000115
个比特，第五制编码位于CAI字段的后
Figure PCTCN2015083526-appb-000116
个比特；或者，第四编码位于CAI字段的后
Figure PCTCN2015083526-appb-000117
个比特，第五编码位于CAI字段的前
Figure PCTCN2015083526-appb-000118
个比特。
在本发明实施例中，进一步的，当将第六编码作为CAI字段时，CAI字段的比特数可以为
Figure PCTCN2015083526-appb-000119
所述第六编码具体的编码方式可以参见下文图9所述的本发明的实施方式。
需要说明的是，本发明实施例中所述的基站中各功能模块的具体工作过程可以参考方法实施例中对应过程的具体描述，本发明实施例在此不再详细赘述。
本发明实施例提供的基站，在根据自身配置的所有配置载波的调度情况生成当前调度载波的CAI字段后，将生成的CAI字段携带在DCI中通过当前调度载波发送至UE。由于在本发明中，基站发送给UE的用于进行载波调度指示的CAI字段指示的是所有调度载波的总数和当前调度载波的累计索引值，或者指示的是当前调度载波的前一个调度载波的编号和后一个调度载波的编号，也就是说，本发明中的CAI字段指示的是调度载波的调度信息，而在现有技术中，基站发送给UE的用于进行载波调度指示的DAI2字段指示的是除当前调度载波外其它所有配置载波中的每个配置载波的调度情况，且由于基站的调度载波的总数小于等于基站的配置载波的总数，因此， 与现有技术相比，当基站配置的载波数较多时，基站根据本发明实施例提供的方法生成的CAI字段包含的比特数较少，这样，便减小了DCI的字段长度，从而降低了信令开销。
本发明另一实施例提供一种UE，如图11所示，该UE可以包括：接收器1001和处理器1002。
接收器1001，用于接收基站通过至少一个当前调度载波发送的携带载波分配指示CAI字段的下行控制信息DCI。
其中，CAI字段用于指示基站配置的所有配置载波中调度载波的总数和当前调度载波的累计索引值M，M表示从第一个配置载波到当前调度载波，当前调度载波是第M个被调度的载波；或者，CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号。
所述处理器1002，用于获取所述接收器1001接收到的所述DCI中的所述CAI字段，以便获知所述所有配置载波的调度情况。
在本发明实施例中，进一步的，所述UE还可以包括：发送器1003。
所述发送器1003，用于在所述处理器1002获取所述DCI中的所述CAI字段之后，向所述基站发送混合自动重传HARQ信息。
其中，所述HARQ信息用于反馈自身是否正确接收所述基站通过所有调度载波发送的数据，所述HARQ信息的比特数等于反馈每个所述调度载波上发送的数据是否被正确接收所需的比特数之和。
在本发明实施例中，进一步的，当CAI字段用于指示基站配置的所有配置载波中调度载波的总数和当前调度载波的累计索引值M时，
在一种可能的实现方式中，CAI字段包括第一编码和第二编码，第一编码为所述基站根据所述调度载波的总数和预设的第一映射关系获得的编码，所述第一映射关系用于指示所述调度载波的总数对应的所述第一编码，所述第二编码为所述基站根据所述M和预设的第二映射关系获得的编码，所述第二映射关系用于指示所述M对应 的所述第二编码。
在第二种可能的实现方式中，所述CAI字段包括所述第一编码和第三编码，所述第三编码为所述基站根据所述M和预设的第三映射关系获得的编码，所述第三映射关系用于指示所述M对应的所述第三编码。所述第三编码的比特数小于所述第二编码的比特数。
在本发明实施例中，进一步的，当CAI字段用于指示当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，
在一种可能的实现方式中，CAI字段包括第四编码和第五编码；所述第四编码为所述基站根据所述前一个调度载波的编号和预设的第四映射关系获得的编码，所述第五编码为所述基站根据所述后一个调度载波的编号和所述第四映射关系获得的编码，所述第四映射关系用于指示所述前一个调度载波的编号对应的所述第四编码，以及所述后一个调度载波的编号对应的所述第五编码。
在另一种可能的实现方式中，CAI字段为第六编码；所述第六编码为所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系获得的编码，所述第四映射关系用于指示所述前一个调度载波的编号、所述后一个调度载波的编号进行联合编码后对应的所述第六编码。
在本发明实施例中，进一步的，处理器1002，还用于根据所述CAI字段，确定所述调度载波的总数，并确定所述至少一个当前调度载波的累计索引值M。
发送器1003，具体用于根据处理器1002确定出的调度载波的总数和至少一个当前调度载波的累计索引值M，向基站发送HARQ信息。
在本发明实施例中，进一步的，处理器1002，还用于根据CAI字段，确定至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，并根据所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，确定调度载波的总数。
发送器1003，具体用于根据处理器1002确定出的调度载波的 总数和至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，向基站发送HARQ信息。
在本发明实施例中，进一步的，当CAI字段包括第一编码和第二编码时，
处理器1002，具体用于针对CAI字段，根据第一映射关系和第一编码，获取调度载波的总数，并根据第二映射关系和第二编码，获取M。
在本发明实施例中，进一步的，当CAI字段包括第一编码和第三编码时，
处理器1002，具体用于针对CAI字段，根据第一映射关系和第一编码，获取调度载波的总数，并根据第三映射关系和第三编码，获取M。
在本发明实施例中，进一步的，当CAI字段包括第四编码和第五编码时，
处理器1002，具体用于针对CAI字段，根据所述第四编码和所述第四映射关系，获取所述前一个调度载波的编号，并根据所述第五编码和所述第四映射关系，获取所述后一个调度载波的编号。
在本发明实施例中，进一步的，当CAI字段为第六编码时，
处理器1002，具体用于针对CAI字段，根据所述第六编码和所述第四映射关系，获取所述前一个调度载波的编号和所述后一个调度载波的编号。
需要说明的是，本发明实施例中所述的UE中各功能模块的具体工作过程可以参考方法实施例中对应过程的具体描述，本发明实施例在此不再详细赘述。
本发明实施例提供的UE，接收基站通过至少一个当前调度载波发送的携带CAI字段的DCI，并获取DCI中的CAI字段，以便获知所有配置载波的调度情况。由于在本发明中，UE接收到的CAI字段指示的是基站配置的所有配置载波中调度载波的总数和当前调度载波的累计索引值，或者指示的是当前调度载波的前一个调度载波的 编号和后一个调度载波的编号，也就是说，本发明中的CAI字段指示的是调度载波的调度信息，而在现有技术中，基站发送给UE的用于进行载波调度指示的DAI2字段指示的是除当前调度载波外其它所有配置载波中的每个配置载波的调度情况，且由于基站的调度载波的总数小于等于基站的配置载波的总数，因此，与现有技术相比，当基站配置的载波数较多时，基站根据本发明实施例提供的方法生成的CAI字段包含的比特数较少，这样，便减小了DCI的字段长度，从而降低了信令开销。
并且，基于本发明实施例提供的调度载波指示，UE可以根据基站的调度载波的总数确定向基站发送的HARQ信息的比特数，由于基站的调度载波的总数小于等于基站的配置载波的总数，因此，与现有技术中的UE根据所有配置载波的总数确定向基站发送的HARQ信息的比特数相比，降低了HARQ信息的比特数，从而降低了信令开销。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，仅以上述各功能模块的划分进行举例说明，实际应用中，可以根据需要而将上述功能分配由不同的功能模块完成，即将装置的内部结构划分成不同的功能模块，以完成以上描述的全部或者部分功能。上述描述的装置的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述模块或单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个装置，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分 开的，作为单元显示的部件可以是一个物理单元或多个物理单元，即可以位于一个地方，或者也可以分布到多个不同地方。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本发明各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个可读取存储介质中。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该软件产品存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(英文：processor)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(英文：Read-Only Memory，简称：ROM)、随机存取存储器(英文：Random Access Memory，简称：RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应所述以权利要求的保护范围为准。

Claims (40)

  1. 一种基站，其特征在于，所述基站包括：处理单元和发送单元；
    所述处理单元，用于根据配置的所有配置载波的调度情况，生成当前调度载波的载波分配指示CAI字段；所述CAI字段用于指示所有所述配置载波中调度载波的总数和所述当前调度载波的累计索引值M，所述M表示从第一个所述配置载波到所述当前调度载波，所述当前调度载波是第M个被调度的载波；或者，所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号；
    所述发送单元，用于将所述处理单元生成的所述CAI字段携带在下行控制信息DCI中通过所述当前调度载波发送至用户终端UE；
    其中，M为大于等于1的整数。
  2. 根据权利要求1所述的基站，其特征在于，当所述CAI字段用于指示所有所述配置载波中调度载波的总数和所述当前调度载波的累计索引值M时，
    所述处理单元，具体用于获取所述调度载波的总数，并获取所述M；根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码；将所述第一编码和所述第二编码组合生成所述CAI字段；
    其中，所述第一映射关系用于指示所述调度载波的总数对应的所述第一编码，所述第二映射关系用于指示所述M对应的所述第二编码。
  3. 如权利要求2所述的基站，其特征在于，所述第一编码的比特数为
    Figure PCTCN2015083526-appb-100001
    所述第二编码的比特数为
    Figure PCTCN2015083526-appb-100002
    其中，所述N为所有所述配置载波的总数；
    Figure PCTCN2015083526-appb-100003
    表示对log2N向上取整所得到的数值。
  4. 根据权利要求3所述的基站，其特征在于，
    所述处理单元，还用于在所述根据所述调度载波的总数和预设的 第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码之前，判断
    Figure PCTCN2015083526-appb-100004
    是否大于2；
    所述处理单元，具体用于当
    Figure PCTCN2015083526-appb-100005
    不大于2时，根据所述调度载波的总数和所述第一映射关系，获取所述第一编码，并根据所述M和所述第二映射关系，获取所述第二编码。
  5. 根据权利要求4所述的基站，其特征在于，
    所述处理单元，还用于当
    Figure PCTCN2015083526-appb-100006
    大于2时，根据所述调度载波的总数和所述第一映射关系，获取所述第一编码，并根据所述M和预设的第三映射关系，获取第三编码；将所述第一编码和所述第三编码组合生成所述CAI字段；
    其中，所述第三映射关系用于指示所述M对应的所述第三编码，所述第三编码的比特数小于所述第二编码的比特数。
  6. 根据权利要求5所述的基站，其特征在于，所述CAI字段的比特数为
    Figure PCTCN2015083526-appb-100007
    所述a为大于等于2，且小于
    Figure PCTCN2015083526-appb-100008
    的整数。
  7. 根据权利要求1所述的基站，其特征在于，当所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，
    所述处理单元，具体用于获取所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号；根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系，生成所述CAI字段。
  8. 根据权利要求7所述的基站，其特征在于，所述第四映射关系用于指示所述前一个调度载波的编号对应的第四编码，以及所述后一个调度载波的编号对应的第五编码；
    所述处理单元，具体用于根据所述前一个调度载波的编号和所述第四映射关系，获取所述第四编码，并根据所述后一个调度载波的编号和所述第四映射关系，获取所述第五编码；将所述第四编码和所述第五编码组合生成所述CAI字段。
  9. 根据权利要求7所述的基站，其特征在于，所述第四映射关 系用于指示所述前一个调度载波的编号、所述后一个调度载波的编号进行联合编码后对应的第六编码；所述第六编码的比特数小于所述第四编码与所述第五编码的比特数之和；
    所述处理单元，具体用于根据所述前一个调度载波的编号、所述后一个调度载波的编号和所述第四映射关系，获取所述第六编码，将所述第六编码作为所述CAI字段。
  10. 根据权利要求8所述的基站，其特征在于，所述CAI字段的比特数为
    Figure PCTCN2015083526-appb-100009
    其中，
    Figure PCTCN2015083526-appb-100010
    表示对log2N向上取整所得到的数值。
  11. 一种用户终端UE，其特征在于，所述UE包括：接收单元和处理单元；
    所述接收单元，用于接收基站通过至少一个当前调度载波发送的携带载波分配指示CAI字段的下行控制信息DCI；所述CAI字段用于指示所述基站配置的所有配置载波中调度载波的总数和所述当前调度载波的累计索引值M，所述M表示从第一个所述配置载波到所述当前调度载波，所述当前调度载波是第M个被调度的载波；或者，所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号；
    所述处理单元，用于获取所述接收单元接收到的所述DCI中的所述CAI字段，以便获知所述所有配置载波的调度情况。
  12. 根据权利要求11所述的UE，其特征在于，所述UE还包括：发送单元；
    所述发送单元，用于在所述处理单元获取所述DCI中的所述CAI字段之后，向所述基站发送混合自动重传HARQ信息；
    其中，所述HARQ信息用于反馈自身是否正确接收所述基站通过所有调度载波发送的数据，所述HARQ信息的比特数等于反馈每个所述调度载波上发送的数据是否被正确接收所需的比特数之和。
  13. 根据权利要求11或12所述的UE，其特征在于，当所述CAI字段用于指示所述基站配置的所有配置载波中调度载波的总数和所 述当前调度载波的累计索引值M时，
    所述CAI字段包括第一编码和第二编码，所述第一编码为所述基站根据所述调度载波的总数和预设的第一映射关系获得的编码，所述第一映射关系用于指示所述调度载波的总数对应的所述第一编码，所述第二编码为所述基站根据所述M和预设的第二映射关系获得的编码，所述第二映射关系用于指示所述M对应的所述第二编码；
    或者，所述CAI字段包括所述第一编码和第三编码，所述第三编码为所述基站根据所述M和预设的第三映射关系获得的编码，所述第三映射关系用于指示所述M对应的所述第三编码；其中所述第三编码的比特数小于所述第二编码的比特数。
  14. 根据权利要求11或12所述的UE，其特征在于，当所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，
    所述CAI字段包括第四编码和第五编码；所述第四编码为所述基站根据所述前一个调度载波的编号和预设的第四映射关系获得的编码，所述第五编码为所述基站根据所述后一个调度载波的编号和所述第四映射关系获得的编码，所述第四映射关系用于指示所述前一个调度载波的编号对应的所述第四编码，以及所述后一个调度载波的编号对应的所述第五编码；
    或者，所述CAI字段为第六编码；所述第六编码为所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系获得的编码，所述第四映射关系用于指示所述前一个调度载波的编号、所述后一个调度载波的编号进行联合编码后对应的所述第六编码。
  15. 根据权利要求13所述的UE，其特征在于，
    所述处理单元，还用于根据所述CAI字段，确定所述调度载波的总数，并确定所述至少一个当前调度载波的累计索引值M；
    所述发送单元，具体用于根据所述处理单元确定出的所述调度载波的总数和所述至少一个当前调度载波的累计索引值M，向所述基站 发送所述HARQ信息。
  16. 根据权利要求14所述的UE，其特征在于，
    所述处理单元，还用于根据所述CAI字段，确定所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，并根据所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，确定调度载波的总数；
    所述发送单元，具体用于根据所述处理单元确定出的所述调度载波的总数和所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，向所述基站发送所述HARQ信息。
  17. 根据权利要求15所述的UE，其特征在于，当所述CAI字段包括所述第一编码和所述第二编码时，
    所述处理单元，具体用于针对所述CAI字段，根据所述第一映射关系和所述第一编码，获取所述调度载波的总数，并根据所述第二映射关系和所述第二编码，获取所述M。
  18. 根据权利要求15所述的UE，其特征在于，当所述CAI字段包括所述第一编码和所述第三编码时，
    所述处理单元，具体用于针对所述CAI字段，根据所述第一映射关系和所述第一编码，获取所述调度载波的总数，并根据所述第三映射关系和所述第三编码，获取所述M。
  19. 根据权利要求16所述的UE，其特征在于，当所述CAI字段包括所述第四编码和所述第五编码时，
    所述处理单元，具体用于针对所述CAI字段，根据所述第四编码和所述第四映射关系，获取所述前一个调度载波的编号，并根据所述第五编码和所述第四映射关系，获取所述后一个调度载波的编号。
  20. 根据权利要求16所述的UE，其特征在于，当所述CAI字段为所述第六编码时，
    所述处理单元，具体用于针对所述CAI字段，根据所述第六编码和所述第四映射关系，获取所述前一个调度载波的编号和所述后一个调度载波的编号。
  21. 一种载波调度指示方法，其特征在于，所述方法包括：
    基站根据自身配置的所有配置载波的调度情况，生成当前调度载波的载波分配指示CAI字段；所述CAI字段用于指示所有所述配置载波中调度载波的总数和所述当前调度载波的累计索引值M，所述M表示从第一个所述配置载波到所述当前调度载波，所述当前调度载波是第M个被调度的载波；或者，所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号；
    所述基站将所述CAI字段携带在下行控制信息DCI中通过所述当前调度载波发送至用户终端UE；
    其中，M为大于等于1的整数。
  22. 根据权利要求21所述的方法，其特征在于，当所述CAI字段用于指示所有所述配置载波中调度载波的总数和所述当前调度载波的累计索引值M时，所述基站根据自身配置的所有配置载波的调度情况，生成当前调度载波的载波分配指示CAI字段，包括：
    所述基站获取所述调度载波的总数，并获取所述M；
    所述基站根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码；其中，所述第一映射关系用于指示所述调度载波的总数对应的所述第一编码，所述第二映射关系用于指示所述M对应的所述第二编码；
    所述基站将所述第一编码和所述第二编码组合生成所述CAI字段。
  23. 如权利要求22所述的方法，其特征在于，所述第一编码的比特数为
    Figure PCTCN2015083526-appb-100011
    所述第二编码的比特数为
    Figure PCTCN2015083526-appb-100012
    其中，所述N为所有所述配置载波的总数；
    Figure PCTCN2015083526-appb-100013
    表示对log2N向上取整所得到的数值。
  24. 根据权利要求23所述的方法，其特征在于，在所述基站根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码之前，还包括：
    所述基站判断
    Figure PCTCN2015083526-appb-100014
    是否大于2；
    所述基站根据所述调度载波的总数和预设的第一映射关系，获取第一编码，并根据所述M和预设的第二映射关系，获取第二编码，包括：
    当
    Figure PCTCN2015083526-appb-100015
    不大于2时，所述基站根据所述调度载波的总数和所述第一映射关系，获取所述第一编码，并根据所述M和所述第二映射关系，获取所述第二编码。
  25. 根据权利要求24所述的方法，其特征在于，所述方法还包括：
    当
    Figure PCTCN2015083526-appb-100016
    欠于2时，所述基站根据所述调度载波的总数和所述第一映射关系，获取所述第一编码，并根据所述M和预设的第三映射关系，获取第三编码；所述第三映射关系用于指示所述M对应的所述第三编码，所述第三编码的比特数小于所述第二编码的比特数；
    所述基站将所述第一编码和所述第三编码组合生成所述CAI字段。
  26. 根据权利要求25所述的方法，其特征在于，所述CAI字段的比特数为
    Figure PCTCN2015083526-appb-100017
    所述a为大于等于2，且小于
    Figure PCTCN2015083526-appb-100018
    的整数。
  27. 根据权利要求21所述的方法，其特征在于，当所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，所述基站根据自身配置的所有配置载波的调度情况，生成当前调度载波的载波分配指示CAI字段，包括：
    所述基站获取所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号；
    所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系，生成所述CAI字段。
  28. 根据权利要求27所述的方法，其特征在于，所述第四映射关系用于指示所述前一个调度载波的编号对应的第四编码，以及所述后一个调度载波的编号对应的第五编码；
    所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系，生成所述CAI字段，包括：
    所述基站根据所述前一个调度载波的编号和所述第四映射关系，获取所述第四编码，并根据所述后一个调度载波的编号和所述第四映射关系，获取所述第五编码；
    所述基站将所述第四编码和所述第五编码组合生成所述CAI字段。
  29. 根据权利要求27所述的方法，其特征在于，所述第四映射关系用于指示所述前一个调度载波的编号、所述后一个调度载波的编号进行联合编码后对应的第六编码；所述第六编码的比特数小于所述第四编码与所述第五编码的比特数之和；
    所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系，生成所述CAI字段，包括：
    所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和所述第四映射关系，获取所述第六编码；
    所述基站将所述第六编码作为所述CAI字段。
  30. 根据权利要求28所述的方法，其特征在于，所述CAI字段的比特数为
    Figure PCTCN2015083526-appb-100019
    其中，
    Figure PCTCN2015083526-appb-100020
    表示对log2N向上取整所得到的数值。
  31. 一种载波调度指示方法，其特征在于，包括：
    用户终端UE接收基站通过至少一个当前调度载波发送的携带载波分配指示CAI字段的下行控制信息DCI；所述CAI字段用于指示所述基站配置的所有配置载波中调度载波的总数和所述当前调度载波的累计索引值M，所述M表示从第一个所述配置载波到所述当前调度载波，所述当前调度载波是第M个被调度的载波；或者，所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号；
    所述UE获取所述DCI中的所述CAI字段，以便获知所述所有配置载波的调度情况。
  32. 根据权利要求31所述的方法，其特征在于，在所述UE获取所述DCI中的所述CAI字段之后，还包括：
    所述UE向所述基站发送混合自动重传HARQ信息；
    其中，所述HARQ信息用于反馈自身是否正确接收所述基站通过所有调度载波发送的数据，所述HARQ信息的比特数等于反馈每个所述调度载波上发送的数据是否被正确接收所需的比特数之和。
  33. 根据权利要求31或32所述的方法，其特征在于，当所述CAI字段用于指示所述基站配置的所有配置载波中调度载波的总数和所述当前调度载波的累计索引值M时，
    所述CAI字段包括第一编码和第二编码，所述第一编码为所述基站根据所述调度载波的总数和预设的第一映射关系获得的编码，所述第一映射关系用于指示所述调度载波的总数对应的所述第一编码，所述第二编码为所述基站根据所述M和预设的第二映射关系获得的编码，所述第二映射关系用于指示所述M对应的所述第二编码；
    或者，所述CAI字段包括所述第一编码和第三编码，所述第三编码为所述基站根据所述M和预设的第三映射关系获得的编码，所述第三映射关系用于指示所述M对应的所述第三编码；其中所述第三编码的比特数小于所述第二编码的比特数。
  34. 根据权利要求31或32所述的方法，其特征在于，当所述CAI字段用于指示所述当前调度载波的前一个调度载波的编号和后一个调度载波的编号时，
    所述CAI字段包括第四编码和第五编码；所述第四编码为所述基站根据所述前一个调度载波的编号和预设的第四映射关系获得的编码，所述第五编码为所述基站根据所述后一个调度载波的编号和所述第四映射关系获得的编码，所述第四映射关系用于指示所述前一个调度载波的编号对应的所述第四编码，以及所述后一个调度载波的编号对应的所述第五编码；
    或者，所述CAI字段为第六编码；所述第六编码为所述基站根据所述前一个调度载波的编号、所述后一个调度载波的编号和预设的第四映射关系获得的编码，所述第四映射关系用于指示所述前一个调度载波的编号、所述后一个调度载波的编号进行联合编码后对应的所 述第六编码。
  35. 根据权利要求33所述的方法，其特征在于，所述UE向所述基站发送混合自动重传HARQ信息，包括：
    所述UE根据所述CAI字段，确定所述调度载波的总数，并确定所述至少一个当前调度载波的累计索引值M；
    所述UE根据所述调度载波的总数和所述至少一个当前调度载波的累计索引值M，向所述基站发送所述HARQ信息。
  36. 根据权利要求34所述的方法，其特征在于，所述UE向所述基站发送混合自动重传HARQ信息，包括：
    所述UE根据所述CAI字段，确定所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号；
    所述UE根据所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，确定调度载波的总数；
    所述UE根据所述调度载波的总数和所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，向所述基站发送所述HARQ信息。
  37. 根据权利要求35所述的方法，其特征在于，当所述CAI字段包括所述第一编码和所述第二编码时，所述UE根据所述CAI字段，确定所述调度载波的总数，并确定所述至少一个当前调度载波的累计索引值M，包括：
    针对所述CAI字段，所述UE根据所述第一映射关系和所述第一编码，获取所述调度载波的总数，并根据所述第二映射关系和所述第二编码，获取所述M。
  38. 根据权利要求35所述的方法，其特征在于，当所述CAI字段包括所述第一编码和所述第三编码时，所述UE根据所述CAI字段，确定所述调度载波的总数，并确定所述至少一个当前调度载波的累计索引值M，包括：
    针对所述CAI字段，所述UE根据所述第一映射关系和所述第一编码，获取所述调度载波的总数，并根据所述第三映射关系和所述第 三编码，获取所述M。
  39. 根据权利要求36所述的方法，其特征在于，当所述CAI字段包括所述第四编码和所述第五编码时，所述UE根据所述CAI字段，确定所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，包括：
    针对所述CAI字段，所述UE根据所述第四编码和所述第四映射关系，获取所述前一个调度载波的编号，并根据所述第五编码和所述第四映射关系，获取所述后一个调度载波的编号。
  40. 根据权利要求36所述的方法，其特征在于，当所述CAI字段为所述第六编码时，所述UE根据所述CAI字段，确定所述至少一个当前调度载波的前一个调度载波的编号和后一个调度载波的编号，包括：
    针对所述CAI字段，所述UE根据所述第六编码和所述第四映射关系，获取所述前一个调度载波的编号和所述后一个调度载波的编号。
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