WO2015123828A1 - 基站、用户设备及自适应重传方法 - Google Patents

基站、用户设备及自适应重传方法 Download PDF

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Publication number
WO2015123828A1
WO2015123828A1 PCT/CN2014/072261 CN2014072261W WO2015123828A1 WO 2015123828 A1 WO2015123828 A1 WO 2015123828A1 CN 2014072261 W CN2014072261 W CN 2014072261W WO 2015123828 A1 WO2015123828 A1 WO 2015123828A1
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WO
WIPO (PCT)
Prior art keywords
data packet
base station
user equipment
frequency band
sent
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2014/072261
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English (en)
French (fr)
Inventor
黄磊
王艺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to JP2016552974A priority Critical patent/JP2017510173A/ja
Priority to PCT/CN2014/072261 priority patent/WO2015123828A1/zh
Priority to KR1020167024177A priority patent/KR20160117552A/ko
Priority to EP14883210.8A priority patent/EP3094033A4/en
Priority to CN201480075776.8A priority patent/CN106031070A/zh
Publication of WO2015123828A1 publication Critical patent/WO2015123828A1/zh
Priority to US15/240,417 priority patent/US10135575B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
    • 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
    • H04L1/14—Arrangements for detecting or preventing errors in the information received by using return channel in which the signals are sent back to the transmitter to be checked ; echo 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
    • H04L1/1607—Details of the supervisory signal
    • 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
    • H04L1/12—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
    • H04L1/1893—Physical mapping arrangements
    • 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
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/04—Scheduled access
    • 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
    • H04L2001/0092—Error control systems characterised by the topology of the transmission link
    • H04L2001/0097—Relays

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a base station, a user equipment, and an adaptive retransmission method. Background technique
  • each base station has an adaptive retransmission function.
  • the base station resends the data packet to the user equipment to ensure that the user equipment can correctly receive the data packet.
  • the packet uses the radio resources in the same frequency band when transmitting and retransmitting the data packet for the first time. Therefore, when the base station transmits the data packet for the first time and schedules the radio resource for the data packet, the radio resource required for retransmitting the data packet needs to be considered.
  • the algorithm that causes radio resource scheduling is more complicated.
  • each base station needs to have an adaptive retransmission function, it needs to be equipped with modules such as retransmission scheduling and buffering, so that the construction cost of the entire communication system is high. Summary of the invention
  • the embodiments of the present invention provide a base station, a user equipment, and an adaptive retransmission method, which can effectively reduce the complexity of the algorithm for radio resource scheduling and effectively reduce the cost of the communication system.
  • an embodiment of the present invention provides a base station, where the base station includes:
  • a sending unit configured to send a data packet to the user equipment by using the radio resource in the first frequency band
  • a receiving unit configured to receive the feedback information sent by the user equipment, where the feedback information is used to indicate whether the data packet is successfully sent
  • the sending unit is further configured to: if the feedback information indicates that the data packet fails to be sent, The wireless resource on the second frequency band sends the data packet to the user equipment;
  • the first frequency band and the second frequency band have overlapping coverage areas, and the user equipment is in the overlapping coverage area.
  • the sending unit is specifically configured to: send the data packet to the small base station, so that the small base station sends the data to the user equipment by using the radio resource on the first frequency band. package.
  • the base station further includes: a first scheduling unit, configured to: use the radio resource on the first frequency band to the user equipment Before transmitting the data packet, scheduling the radio resource on the first frequency band for the data packet; the sending unit is further configured to send the call information to the small base station, where the call information includes: a first frequency band scheduled for the data packet And the information about the radio resource, so that the small base station sends the data packet to the user equipment by using the radio resource on the scheduled first frequency band according to the scheduling information.
  • a first scheduling unit configured to: use the radio resource on the first frequency band to the user equipment Before transmitting the data packet, scheduling the radio resource on the first frequency band for the data packet
  • the sending unit is further configured to send the call information to the small base station, where the call information includes: a first frequency band scheduled for the data packet And the information about the radio resource, so that the small base station sends the data packet to the user equipment by using the radio resource on the scheduled first frequency band according to the scheduling information.
  • the receiving unit is further configured to: after the sending unit sends a data packet to the user equipment, receive the small base station to send Data packet information, the data packet information includes: an identifier of the data packet.
  • the base station further includes: an acquiring unit, configured to: before the receiving unit receives the feedback information sent by the user equipment, acquire the cached data packet according to the identifier of the data packet; The data packet schedules radio resources on the second frequency band.
  • the base station further includes: an acquiring unit, configured to: after the receiving unit receives the feedback information sent by the user equipment, acquire the cached data packet according to the identifier of the data packet; The data packet schedules radio resources on the second frequency band.
  • an embodiment of the present invention provides a user equipment, where the user equipment includes: a receiving unit, configured to receive a data packet sent by a base station by using a radio resource on a first frequency band; and a determining unit, configured to determine the data packet Whether to send successfully;
  • a sending unit configured to send feedback information to the base station, where the feedback information is used to indicate whether the data packet is successfully sent;
  • the receiving unit is further configured to: if the feedback information indicates that the data packet fails to be sent, receive the data packet that is sent by the base station by using a radio resource on a second frequency band;
  • the first frequency band and the second frequency band have overlapping coverage areas, and the user equipment is in the overlapping coverage area.
  • the sending unit is specifically configured to: send the feedback information to the base station by using the small base station.
  • the first frequency band is higher than the second frequency band.
  • an embodiment of the present invention provides an adaptive retransmission method, where the method includes: transmitting, by using a radio resource on a first frequency band, a data packet to a user equipment;
  • the data packet is sent to the user equipment by using the radio resource on the second frequency band;
  • the first frequency band and the second frequency band have overlapping coverage areas, and the user equipment is in the overlapping coverage area.
  • the sending, by using the radio resource on the first frequency band, the data packet to the user equipment is: sending the data packet to the small base station, so that the small base station is The data packet is transmitted to the user equipment by using the radio resource on the first frequency band.
  • the method before the sending the data packet to the user equipment by using the radio resource on the first frequency band, the method further includes: The data packet is used to schedule radio resources on the first frequency band; the call information is sent to the small base station, where the call information includes: information about the radio resources in the first frequency band scheduled for the data packet, so that the small base station according to the The scheduling information uses the radio resources on the scheduled first frequency band to send the data packet to the user equipment.
  • the method further includes: receiving the The packet information sent by the small base station, where the data packet information includes: an identifier of the data packet.
  • the method further includes: acquiring the buffered data packet according to the identifier of the data packet; and scheduling the radio resource on the second frequency band for the data packet.
  • the method further includes: acquiring the buffered data packet according to the identifier of the data packet; and scheduling the radio resource on the second frequency band for the data packet.
  • a third aspect or a first possible implementation of the third aspect or a second possible implementation of the third aspect or a third possible implementation of the third aspect or a fourth possible implementation of the third aspect The fifth possible implementation manner of the third aspect, in a sixth possible implementation manner, the first frequency band is higher than the second frequency band.
  • the base station first uses the radio resource on the first frequency band to send the number to the user equipment.
  • the packet if the data packet fails to be sent, the data packet is sent to the user equipment by using the radio resource on the second frequency band.
  • the data packet sent by the base station for the first time is sent to the user equipment by using the radio resource on the first frequency band, and when the data packet is retransmitted, the data packet is sent to the user equipment by using the radio resource on the second frequency band, that is, The first time the data packet is sent and retransmitted is in a different frequency band. Therefore, when the base station schedules the radio resource of the first frequency band for the data packet, there is no need to consider the radio resources required for retransmitting the data packet, which can effectively reduce the wireless The complexity of the algorithm for resource scheduling.
  • FIG. 1 is a schematic structural diagram of a base station according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic structural diagram of another base station according to Embodiment 1 of the present invention.
  • FIG. 3 is a schematic structural diagram of still another base station according to Embodiment 1 of the present invention.
  • FIG. 4 is a schematic structural diagram of a user equipment according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic flowchart of an adaptive retransmission method according to Embodiment 3 of the present invention
  • FIG. 6 is a schematic structural diagram of a communication system according to Embodiment 4 of the present invention
  • FIG. 7 is a schematic diagram of a signaling flow of an adaptive retransmission method according to Embodiment 5 of the present invention
  • FIG. 8 is a schematic diagram of a signaling flow of another adaptive retransmission method according to Embodiment 5 of the present invention
  • FIG. 10 is a schematic diagram of a signaling flow of another adaptive retransmission method according to Embodiment 6 of the present invention.
  • FIG. 11 is a schematic diagram of a signaling flow of an adaptive retransmission method according to Embodiment 7 of the present invention
  • FIG. 12 is a schematic diagram of a signaling flow of another adaptive retransmission method according to Embodiment 7 of the present invention
  • FIG. 13 is a schematic diagram of a signaling flow of an adaptive retransmission method according to Embodiment 8 of the present invention
  • FIG. 14 is a schematic diagram of a signaling flow of another adaptive retransmission method according to Embodiment 8 of the present invention
  • FIG. 15 is a schematic structural diagram of a communication system according to Embodiment 9 of the present invention
  • FIG. 16 is a schematic diagram of a signaling flow of an adaptive retransmission method according to Embodiment 10 of the present invention
  • FIG. 17 is a schematic flowchart of signaling flow of an adaptive retransmission method according to Embodiment 11 of the present invention
  • FIG. 1 is a schematic structural diagram of a base station according to Embodiment 1 of the present invention.
  • the base station includes: a transmitting unit 110 and a receiving unit 120.
  • the sending unit 110 is configured to send a data packet to the user equipment by using the radio resource on the first frequency band.
  • the receiving unit 120 is configured to receive feedback information sent by the user equipment, where the feedback information is used to indicate whether the data packet is successfully sent.
  • the sending unit 110 is further configured to: if the feedback information indicates that the data packet fails to be sent, send the data packet to the user equipment by using the wireless resource on the second frequency band.
  • the first frequency band and the second frequency band have overlapping coverage areas, and the user equipment is in the overlapping coverage area.
  • the sending unit 11 Q is specifically configured to:
  • the data packet is transmitted to the small base station, so that the small base station transmits the data packet to the user equipment by using the radio resource on the first frequency band.
  • the base station may further include: a first scheduling unit 130.
  • the first scheduling unit 130 is configured to schedule radio resources on the first frequency band for the data packet before using the radio resource on the first frequency band to send the data packet to the user equipment.
  • the sending unit 110 further The sending information is sent to the small base station, where the calling information includes: information about the radio resource in the first frequency band scheduled for the data packet, so that the small base station uses the radio resource on the scheduled first frequency band according to the scheduling information.
  • the user equipment sends the data packet.
  • the receiving unit 120 is further configured to: after transmitting the data packet to the user equipment by using the radio resource on the first frequency band, receive the data packet information sent by the small base station, where the data packet information includes: the identifier of the data packet.
  • the base station may further include: an obtaining unit 140 and a second scheduling unit 150.
  • the obtaining unit 140 is configured to obtain the buffered data packet according to the identifier of the data packet before the receiving unit 120 receives the feedback information sent by the user equipment or after the receiving unit 120 receives the feedback information sent by the user equipment.
  • the second scheduling unit 150 uses And scheduling wireless resources on the second frequency band for the data packet.
  • the first frequency band is higher than the second frequency band.
  • the foregoing sending unit 110 may be a transmitter or a transceiver
  • the receiving unit 120 may be a receiver or a transceiver
  • the sending unit 110 and the receiving unit 120 may be integrated to form a transceiver unit, corresponding to hardware implementation.
  • the first scheduling unit 130, the obtaining unit 140 and the second scheduling unit 150 may be embedded in the hardware of the base station in hardware or may be stored in the memory of the base station in software, so that the processor can execute the call.
  • the processor can be a central processing unit (CPU), a microprocessor, a microcontroller, or the like.
  • the base station first uses the radio resource on the first frequency band to send a data packet to the user equipment, and if the data packet fails to be sent, the radio resource on the second frequency band is used to send the data packet to the user equipment. .
  • the data packet sent by the base station for the first time is sent to the user equipment by using the radio resource on the first frequency band, and when the data packet is retransmitted, the data packet is sent to the user equipment by using the radio resource on the second frequency band, that is, The first time the data packet is sent and retransmitted is in a different frequency band. Therefore, when the base station schedules the radio resource of the first frequency band for the data packet, The complexity of the algorithm for radio resource scheduling can be effectively reduced without considering the radio resources required to retransmit the data packet.
  • Embodiment 2 Embodiment 2
  • FIG. 4 is a schematic structural diagram of a user equipment according to Embodiment 2 of the present invention.
  • the user equipment includes: a receiving unit 210, a determining unit 220, and a transmitting unit 230.
  • the receiving unit 210 is configured to receive a data packet that is sent by the base station by using the radio resource on the first frequency band.
  • the sending unit 230 is configured to send feedback information to the base station, where the feedback information is used to indicate whether the data packet is successfully sent.
  • the receiving unit 210 is further configured to: if the feedback information indicates that the data packet fails to be sent, the receiving base station uses the data packet sent by using the radio resource on the second frequency band.
  • the first frequency band and the second frequency band have overlapping coverage areas, and the user equipment is in the overlapping coverage area.
  • the overlapping coverage of the first and second bands can take many forms, for example, the partial coverage of the first and second bands overlap, or the coverage of one of the bands is within the coverage of the other. and many more.
  • the sending unit 230 is specifically configured to: send the feedback information to the base station by using the small base station. Further, wherein the first frequency band is higher than the second frequency band.
  • the receiving unit 210 may be a receiver or a transceiver
  • the sending unit 230 may be a transmitter or a transceiver
  • the receiving unit 210 and the sending unit 230 may be integrated to form a transceiver unit, corresponding to hardware implementation.
  • the above determining unit 220 may be embedded in or independent of the processor of the user equipment in hardware, or may be stored in the memory of the base station in software, so that the processor invokes the operations corresponding to the above modules.
  • the processor can be a central processing unit (CPU), a microprocessor, a microcontroller, or the like.
  • the user equipment first receives a data packet sent by the base station by using the radio resource on the first frequency band, and if the data packet fails to be sent, the user equipment receives the data packet again.
  • the base station transmits the data packet transmitted by the radio resource on the second frequency band.
  • the data packet sent by the base station for the first time is sent to the user equipment by using the radio resource on the first frequency band, and when the data packet is retransmitted, the data packet is sent to the user equipment by using the radio resource on the second frequency band, that is, The first time the data packet is sent and retransmitted is in a different frequency band. Therefore, when the base station schedules the radio resource of the first frequency band for the data packet, there is no need to consider the radio resources required for retransmitting the data packet, which can effectively reduce the wireless The complexity of the algorithm for resource scheduling.
  • FIG. 5 it is a schematic flowchart of an adaptive retransmission method according to Embodiment 3 of the present invention.
  • the executor of the adaptive retransmission method is a base station, which may be specifically a base station provided in Embodiment 1 of the present invention.
  • the adaptive retransmission method includes the following steps:
  • Step S301 Send a data packet to the user equipment by using the radio resource on the first frequency band.
  • Step S302 Receive feedback information sent by the user equipment, where the feedback information is used to indicate whether the data packet is successfully sent.
  • Step S303 If the feedback information indicates that the data packet fails to be sent, the data packet is sent to the user equipment by using the wireless resource on the second frequency band.
  • the first frequency band and the second frequency band have overlapping coverage areas, and the user equipment is in the overlapping coverage area.
  • step S301 the data packet is sent to the user equipment by using the radio resource on the first frequency band, which is specifically:
  • the data packet is sent to the small base station, so that the small base station transmits the data packet to the user equipment by using the radio resource on the first frequency band.
  • the method further includes: scheduling, by the radio resource on the first frequency band, the radio resource on the first frequency band; sending the call information to the small base station, where The call information includes: the radio resource on the first frequency band scheduled for the data packet The information of the source, so that the small base station sends the data packet to the user equipment by using the radio resource on the scheduled first frequency band according to the scheduling information.
  • the method further includes:
  • the method further includes:
  • the method further includes:
  • the first frequency band is higher than the second frequency band.
  • the base station first uses the radio resource on the first frequency band to send a data packet to the user equipment, and if the data packet fails to be transmitted, the radio resource on the second frequency band is used to the user equipment.
  • Send the packet The data packet sent by the base station for the first time is sent to the user equipment by using the radio resource on the first frequency band, and when the data packet is retransmitted, the data packet is sent to the user equipment by using the radio resource on the second frequency band, that is, The first time the data packet is sent and retransmitted is in a different frequency band. Therefore, when the base station schedules the radio resource of the first frequency band for the data packet, there is no need to consider the radio resources required for retransmitting the data packet, which can effectively reduce the wireless The complexity of the algorithm for resource scheduling.
  • Embodiment 4 Embodiment 4
  • FIG. 6 is a schematic structural diagram of a communication system according to Embodiment 4 of the present invention.
  • the communication system includes: a base station 10, a small base station 20, and a user equipment 30.
  • the base station 10 can
  • the user equipment 30 may be the user equipment provided in the second embodiment of the present invention.
  • the base station 10 covers a relatively large area by using a frequency band having a lower frequency point (for example, 3.5 GHz, 5 GHz). Within the coverage of the base station 10, a plurality of small base stations 20 are arranged for hotspot coverage, and the small base station 20 covers a relatively small area by using a frequency band having a higher frequency point (for example, 28 GHz, 38 GHz).
  • the user equipment 30 within the coverage of the base station 10 and within the coverage of the small base station 10 can simultaneously communicate with the base station 10 and the small base station 20 through one or more frequency bands.
  • the user equipment 30 can communicate with the base station 10 through the 5 GHz frequency band, and can also communicate with the small base station 20 through the 28 GHz frequency band; or, the user equipment 30 can communicate with the base station 10 through the two frequency bands of 3.5 GHz and 5 GHz,
  • the small base station 20 is communicated through the 28 GHz band; or, the user equipment 30 can communicate with the base station 10 through the 5 GHz band, and can also communicate with the small base station 20 through the 28 GHz and 38 GHz bands.
  • the data transmitted and received by the user equipment 30 in the coverage of the base station 10 is exchanged with the core network through the base station 10. That is, the downlink data of the user equipment 30 is sent from the core network to the base station 10, and the base station 10 passes the data through the frequency.
  • the frequency band is directly transmitted to the user equipment 30, or the base station 10 transmits the data to the small base station 20 through the frequency band or the wired fiber with a higher frequency point, and then the small base station 20 transmits the frequency to the user equipment 30 through the frequency band with a higher frequency point.
  • FIG. 7 is a schematic diagram of a signaling flow of an adaptive retransmission method according to Embodiment 5 of the present invention.
  • the adaptive retransmission method is applied to the communication system described in Embodiment 4, and is applicable to a scenario in which the user equipment is in a coverage area in which the base station and the small base station overlap.
  • the communication between the base station and the user equipment is performed by using the 5 GHz frequency band, and the small base station and the user equipment are communicated by using the 28 GHz frequency band as an example.
  • the adaptive retransmission method includes the following steps:
  • Step S501 The base station sends a data packet to the small base station.
  • the base station includes: a Packet Data Convergence Protocol (PDCP) layer, a Radio Link Control (RLC) layer, a Medium Access Control (MAC) layer, and a Physical (PHY) layer.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • PHY Physical
  • Step S502 the base station caches the data packet.
  • the RLC layer of the base station buffers the data packet sent to the small base station, so that when the small base station fails to send the data packet to the user equipment, the data packet is sent to the user equipment again.
  • Step S503 The small base station schedules radio resources on the 28 GHz band for the data packet.
  • the small base station Since the data packet received by the small base station is already the data packet processed by the PDCP layer and the RLC layer of the base station, the small base station does not need to have the PDCP layer and the RLC layer, and only needs to include the MAC layer and the PHY layer, which can effectively reduce The construction cost of the small base station reduces the construction cost of the entire communication system.
  • the small base station's MAC layer schedules the radio resources on the 28 GHz band for the data packet.
  • Step S504 The small base station sends the data packet to the user equipment by using the scheduled radio resource in the 28 GHz frequency band.
  • the PHY layer of the small base station After the MAC layer of the small base station schedules the radio resources on the 28 GHz band for the data packet, the PHY layer of the small base station transmits the data packet to the user equipment by using the MAC layer of the small base station for the radio resources in the 28 GHz frequency band scheduled by the data packet.
  • Step S505 The small base station sends the data packet information to the base station.
  • the data packet information includes: an identifier of a data packet sent by the small base station to the user equipment, to inform the base station that the data packet has been sent by the small base station to the user equipment.
  • Step S506 the user equipment determines whether the data packet is successfully sent.
  • Step S507 The user equipment sends feedback information to the base station.
  • the feedback information is Acknowledgement (ACK) information; if the user equipment determines that the data packet fails to be sent, the feedback information is Negative Acknowledgement (NACK) information.
  • ACK Acknowledgement
  • NACK Negative Acknowledgement
  • step S509 to step S511 are performed.
  • step S507 can be performed in two steps. As shown in FIG. 8, step S507 includes: Step S507a: The user equipment sends feedback information to the small base station.
  • Step S507b The small base station sends the feedback information to the base station.
  • Step S508 the base station deletes the cached data packet.
  • the MAC layer of the base station determines the identifier of the data packet according to the feedback information sent by the user equipment, and the data packet corresponding to the identifier of the RLC layer of the base station has been successfully sent, and then the base station The RLC layer deletes the data packet corresponding to the identifier.
  • Step S509 The base station acquires the buffered data packet.
  • the MAC layer of the base station determines the identifier of the data packet according to the feedback information sent by the user equipment, and the data packet corresponding to the identifier of the RLC layer of the base station fails to be sent, and then the RLC of the base station fails.
  • the layer sends the buffered data packet corresponding to the identifier to the MAC layer of the base station.
  • Step S510 The base station schedules radio resources on the 5 GHz band for the data packet.
  • the MAC layer of the base station After the MAC layer of the base station acquires the data packet, the MAC layer of the base station schedules the radio resource on the 5 GHz band for the data packet.
  • the base station When receiving the feedback information and the feedback information is NACK information, the base station starts to acquire the buffered data packet, and invokes the radio resource in the 5 GHz frequency band for the data packet, that is, the base station only schedules the wireless in the 5 GHz frequency band for the data packet that needs to be retransmitted. Resources can improve the utilization of wireless resources.
  • Step S511 The base station sends the data packet to the user equipment by using the radio resource on the scheduled 5 GHz band.
  • the PHY layer of the base station uses the MAC layer of the base station to transmit the data packet to the user equipment for the radio resources in the 5 GHz band scheduled by the data packet.
  • Step S506 to step S511 are performed.
  • the data packet sent by the base station for the first time is sent to the user equipment by using the radio resource on the first frequency band (28 GHz) by the small base station, and the data packet is retransmitted.
  • the radio resource on the second frequency band (5 GHz) is used to transmit to the user equipment, that is, the first time the data packet is sent and retransmitted is in a different frequency band, therefore, the small base station schedules the radio resource for the data packet.
  • the radio resources required for retransmitting the data packet need not be considered, the complexity of the algorithm for radio resource scheduling can be effectively reduced.
  • the small base station does not need to have the retransmission function, which can effectively reduce the structure of the communication system.
  • FIG. 9 it is a schematic diagram of a signaling flow of an adaptive retransmission method according to Embodiment 6 of the present invention.
  • the adaptive retransmission method is applied to the communication system described in Embodiment 4, and is applicable to a scenario in which the user equipment is in a coverage area in which the base station and the small base station overlap.
  • the communication between the base station and the user equipment is performed by using the 5 GHz frequency band, and the small base station and the user equipment are communicated by using the 28 GHz frequency band as an example.
  • the adaptive retransmission method includes the following steps:
  • Step S601 The base station sends a data packet to the small base station.
  • the base station includes: a PDCP layer, an RLC layer, a MAC layer, and a PHY layer.
  • the data packet is first processed by the PDCP layer and the RLC layer of the base station, and then transmitted to the small base station.
  • Step S602 the base station caches the data packet.
  • the RLC layer of the base station buffers the data packet sent to the small base station, so that when the small base station fails to send the data packet to the user equipment, the data packet is sent to the user equipment again.
  • Step S603 The small base station schedules the radio resource on the 28 GHz band for the data packet.
  • the small base station Since the data packet received by the small base station is already a data packet processed by the PDCP layer and the RLC layer of the base station, the small base station does not need to have the PDCP layer and the RLC layer, and only needs to include the MAC layer and the PHY layer. That is, the construction cost of the small base station can be effectively reduced, thereby reducing the construction cost of the entire communication system.
  • the small base station's MAC layer schedules the radio resources on the 28 GHz band for the data packet.
  • Step S604 The small base station sends the data packet to the user equipment by using the scheduled radio resource in the 28 GHz frequency band.
  • the PHY layer of the small base station After the MAC layer of the small base station schedules the radio resources on the 28 GHz band for the data packet, the PHY layer of the small base station transmits the data packet to the user equipment by using the MAC layer of the small base station for the radio resources in the 28 GHz frequency band scheduled by the data packet.
  • Step S605 The small base station sends the data packet information to the base station.
  • the data packet information includes: an identifier of a data packet sent by the small base station to the user equipment, to inform the base station that the data packet has been sent by the small base station to the user equipment.
  • Step S606 The base station acquires the buffered data packet.
  • the MAC layer of the base station determines the identifier of the data packet according to the feedback information sent by the user equipment, and reports the identifier of the data packet to the RLC layer of the base station, and then the RLC layer of the base station sends the buffered data packet corresponding to the identifier to the MAC layer of the base station.
  • Step S607 The base station schedules radio resources on the 5 GHz band for the data packet.
  • the MAC layer of the base station After the MAC layer of the base station acquires the data packet, the MAC layer of the base station schedules the radio resource on the 5 GHz band for the data packet.
  • the base station acquires the buffered data packet before receiving the feedback information, and invokes the radio resource in the 5 GHz frequency band for the data packet. If the received feedback information is the NACK information, the base station does not need to wait for the base station to schedule the radio resource for the data packet, and the direct utilization is already used. The radio resource on the 5 GHz band scheduled by the packet transmits the packet, thereby reducing the time to retransmit the packet.
  • Step S608 the user equipment determines whether the data packet is successfully sent.
  • Step S609 The user equipment sends feedback information to the base station.
  • the feedback information is ACK information; if the user equipment determines that the data packet fails to be sent, the feedback information is NACK information.
  • the feedback information is ACK information, step S61 0 is performed.
  • step S61 1 is performed.
  • step S609 can be performed in two steps. As shown in FIG. 10, step S609 includes: Step S609a: The user equipment sends feedback information to the small base station.
  • Step S609b the small base station sends the feedback information to the base station.
  • Step S61 0 The base station deletes the buffered data packet.
  • the MAC layer of the base station determines the identifier of the data packet according to the feedback information sent by the user equipment, and the data packet corresponding to the identifier of the RLC layer of the base station has been successfully sent, and then the base station The RLC layer deletes the data packet corresponding to the identifier.
  • Step S61 The base station sends the data packet to the user equipment by using the radio resource in the scheduled 5 GHz frequency band.
  • the PHY layer of the base station uses the MAC layer of the base station to send the data packet to the user equipment for the radio resource in the 5 GHz frequency band scheduled by the data packet.
  • the user equipment may perform step S606 to step S61 1 again.
  • the data packet sent by the base station for the first time is sent to the user equipment by using the radio resource in the first frequency band (28 GHz) by the small base station, and the data packet is retransmitted.
  • the radio resource on the second frequency band (5 GHz) is used to transmit to the user equipment, that is, the first time the data packet is sent and retransmitted is in a different frequency band, therefore, the small base station schedules the radio resource for the data packet.
  • the radio resources required for retransmitting the data packet need not be considered, the complexity of the algorithm for radio resource scheduling can be effectively reduced.
  • the small base station does not need to have the retransmission function, which can effectively reduce the structure of the communication system.
  • FIG. 11 it is a signaling flow of an adaptive retransmission method provided by Embodiment 7 of the present invention.
  • the adaptive retransmission method is applied to the communication system described in Embodiment 4, and is applicable to a scenario in which the user equipment is in a coverage area in which the base station and the small base station overlap.
  • the communication between the base station and the user equipment is performed by using the 5 GHz frequency band, and the small base station and the user equipment are communicated by using the 28 GHz frequency band as an example.
  • the adaptive retransmission method includes the following steps:
  • Step 701 The base station schedules radio resources on the 28 GHz band for the data packet.
  • the base station includes: a PDCP layer, an RLC layer, a MAC layer, and a PHY layer.
  • the packet first passes through the base station
  • the PDCP layer and the RLC layer are processed, and then the MAC layer of the base station schedules the radio resources on the 28 GHz band for the data packet.
  • Step S702 The base station sends scheduling information to the small base station.
  • the scheduling information includes: information about a radio resource in a 28 GHz band scheduled by the MAC layer of the base station, such as a packet size, a modulation and coding mode, and a logical channel number.
  • Step S703 The base station sends a data packet to the small base station.
  • the data packet has been processed by the PDCP layer, the RLC layer and the MAC layer of the base station.
  • Step S704 The base station caches the data packet.
  • the RLC layer of the base station buffers the data packet sent to the small base station, so that when the small base station fails to send the data packet to the user equipment, the data packet is sent to the user equipment again.
  • Step S705 The small base station sends the data packet to the user equipment by using the radio resource on the 28 GHz frequency band that the base station schedules for the data packet.
  • the small base station Since the data packet received by the small base station is already a data packet processed by the PDCP layer, the RLC layer and the MAC layer of the base station, the small base station does not need to have the PDCP layer, the RLC layer and the MAC layer, and only needs to include the PHY layer. The construction cost of the small base station can be effectively reduced, thereby reducing the construction cost of the entire communication system.
  • the eNB layer of the small base station After receiving the data packet, the eNB layer of the small base station determines, according to the scheduling information, the MAC layer of the base station is the radio resource in the 28 GHz frequency band scheduled by the data packet, and then uses the MAC layer of the base station to schedule the 28 GHz frequency band of the data packet.
  • the wireless resource sends the data packet to the user equipment.
  • Step S706 The user equipment determines whether the data packet is successfully sent.
  • Step S707 The user equipment sends feedback information to the base station.
  • the feedback information is ACK information; if the user equipment determines that the data packet fails to be sent, the feedback information is NACK information.
  • step S708 is performed.
  • step S709 to step S711 are performed.
  • step S707 can be performed in two steps. As shown in FIG. 12, step S707 includes: Step S707: The user equipment sends feedback information to the small base station.
  • Step S707b The small base station sends the feedback information to the base station.
  • Step S708 the base station deletes the buffered data packet.
  • the MAC layer of the base station determines the identifier of the data packet, and reports that the data packet corresponding to the identifier of the RLC layer of the base station has been successfully sent, and then the RLC layer of the base station deletes and caches the identifier corresponding to the identifier. data pack.
  • Step S709 The base station acquires the buffered data packet.
  • the MAC layer of the base station determines the identifier of the data packet, and reports that the data packet corresponding to the identifier of the RLC layer of the base station fails to be sent, and then the RLC layer of the base station corresponds to the cached identifier.
  • the data packet is sent to the MAC layer of the base station.
  • Step S710 The base station schedules radio resources on the 5 GHz band for the data packet.
  • the MAC layer of the base station After the MAC layer of the base station acquires the data packet, the MAC layer of the base station schedules the radio resource on the 5 GHz band for the data packet.
  • the base station may include two MAC layers, where one MAC layer schedules radio resources on the 28 GHz band for the data packet, and another MAC layer schedules radio resources on the 5 GHz band for the data packet, thereby improving the base station as data.
  • the efficiency of packet scheduling wireless resources may include two MAC layers, where one MAC layer schedules radio resources on the 28 GHz band for the data packet, and another MAC layer schedules radio resources on the 5 GHz band for the data packet, thereby improving the base station as data. The efficiency of packet scheduling wireless resources.
  • Step S711 The base station sends the data packet to the user equipment by using the radio resource on the scheduled 5 GHz frequency band.
  • the PHY layer of the base station uses the MAC layer of the base station to transmit the data packet to the user equipment for the radio resources in the 5 GHz band scheduled by the data packet.
  • the user equipment may perform step S706 to step S711 again.
  • the data packet sent by the base station for the first time is sent to the user equipment by using the radio resource in the first frequency band (28 GHz) by the small base station, and the data packet is retransmitted.
  • the radio resource on the second frequency band (5 GHz) is used to transmit to the user equipment, that is, the first time the data packet is sent and retransmitted is in a different frequency band, therefore, the small base station schedules the radio resource for the data packet.
  • the radio resources required for retransmitting the data packet need not be considered, the complexity of the algorithm for radio resource scheduling can be effectively reduced.
  • the small base station does not need to have the retransmission function, which can effectively reduce the structure of the communication system.
  • FIG. 13 it is a schematic diagram of a signaling flow of an adaptive retransmission method according to Embodiment 11 of the present invention.
  • the adaptive retransmission method is applied to the communication system described in Embodiment 4, and is applicable to a scenario in which the user equipment is in a coverage area in which the base station and the small base station overlap.
  • the communication between the base station and the user equipment is performed by using the 5 GHz frequency band, and the small base station and the user equipment are communicated by using the 28 GHz frequency band as an example.
  • the adaptive retransmission method includes the following steps:
  • Step S801 The base station schedules radio resources on the 28 GHz band for the data packet.
  • the base station includes: a PDCP layer, an RLC layer, a MAC layer, and a PHY layer.
  • the packet first passes through the base station
  • the processing of the PDCP layer and the RLC layer is then scheduled by the MAC layer of the base station for the data packet on the 28 GHz band. Wireless resources.
  • Step S802 The base station sends scheduling information to the small base station.
  • the scheduling information includes: information about a radio resource in a 28 GHz band scheduled by the MAC layer of the base station, such as a packet size, a modulation and coding mode, and a logical channel number.
  • Step S803 The base station sends a data packet to the small base station.
  • the data packet has been processed by the PDCP layer, the RLC layer and the MAC layer of the base station.
  • Step S804 the base station caches the data packet.
  • the RLC layer of the base station buffers the data packet sent to the small base station, so that when the small base station fails to send the data packet to the user equipment, the data packet is sent to the user equipment again.
  • Step S805 The small base station sends the data packet to the user equipment by using the radio resource on the 28 GHz frequency band that the base station schedules for the data packet.
  • the small base station Since the data packet received by the small base station is already a data packet processed by the PDCP layer, the RLC layer and the MAC layer of the base station, the small base station does not need to have the PDCP layer, the RLC layer and the MAC layer, and only needs to include the PHY layer. The construction cost of the small base station can be effectively reduced, thereby reducing the construction cost of the entire communication system.
  • the eNB layer of the small base station After receiving the data packet, the eNB layer of the small base station determines, according to the scheduling information, the MAC layer of the base station is the radio resource in the 28 GHz frequency band scheduled by the datagram, and then uses the MAC layer of the base station to schedule the 28 GHz frequency band of the data packet.
  • the wireless resource sends the data packet to the user equipment.
  • Step S806 The base station acquires the buffered data packet.
  • the MAC layer of the base station determines the identifier of the data packet and reports it to the RLC layer of the base station, and then the RLC layer of the base station sends the buffered data packet corresponding to the identifier to the MAC layer of the base station.
  • Step S807 The base station schedules radio resources on the 5 GHz band for the data packet.
  • the MAC layer of the base station After the MAC layer of the base station acquires the data packet, the MAC layer of the base station schedules the radio resource on the 5 GHz band for the data packet.
  • the base station may include two MAC layers, where one MAC layer schedules radio resources on the 28 GHz band for the data packet, and the other MAC layer advertises the 5 GHz band for the data packet. Radio resources, thereby improving the efficiency of the base station for scheduling radio resources for data packets.
  • the base station acquires the buffered data packet before receiving the feedback information, and invokes the radio resource in the 5 GHz frequency band for the data packet. If the received feedback information is the NACK information, the base station does not need to wait for the base station to schedule the radio resource for the data packet, and the direct utilization is already used. The radio resource on the 5 GHz band scheduled by the packet transmits the packet, thereby reducing the time to retransmit the packet.
  • Step S808 The user equipment determines whether the data packet is successfully sent.
  • Step S809 The user equipment sends feedback information to the base station.
  • the feedback information is ACK information; if the user equipment determines that the data packet fails to be sent, the feedback information is NACK information.
  • step S810 is performed.
  • step S811 is performed.
  • step S809 can be performed in two steps. As shown in FIG. 14, step S809 includes: Step S809a: The user equipment sends feedback information to the small base station.
  • Step S809b The small base station sends the feedback information to the base station.
  • Step S810 the base station deletes the cached data packet.
  • the MAC layer of the base station determines the identifier of the data packet, and reports that the data packet corresponding to the identifier of the RLC layer of the base station has been successfully sent, and then the RLC layer of the base station deletes and caches the identifier corresponding to the identifier. data pack.
  • Step S811 The base station sends the data packet to the user equipment by using the radio resource on the scheduled 5 GHz band.
  • the PHY layer of the base station uses the MAC layer of the base station to send the data packet to the user equipment for the radio resource in the 5 GHz frequency band scheduled by the data packet.
  • the user equipment may perform step S806 to step S811 again.
  • the data packet sent by the base station for the first time is sent to the user equipment by using the radio resource in the first frequency band (28 GHz) through the small base station.
  • the data packet is retransmitted, it is sent to the user equipment by using the radio resource in the second frequency band (5 GHz), that is, the first time the data packet is sent and retransmitted is in a different frequency band, and therefore, is small.
  • the base station schedules radio resources for the data packet, it does not need to consider the radio resources required for retransmitting the data packet, and the complexity of the algorithm for radio resource scheduling can be effectively reduced.
  • the small base station does not need to have the retransmission function, and the construction cost of the communication system can be effectively reduced.
  • FIG. 15 is a schematic structural diagram of a communication system according to Embodiment 9 of the present invention.
  • the communication system includes: a base station 40 and a user equipment 50.
  • the base station 40 can be the base station provided in the first embodiment
  • the user equipment 50 can be the user equipment provided in the second embodiment.
  • Base station 40 communicates with user equipment 50 using at least two frequency bands.
  • the frequency band with a higher frequency point has a smaller coverage area
  • the frequency band with a lower frequency point has a larger coverage area.
  • the base station 40 uses two frequency bands to communicate with the user equipment 50, and the user equipment 50 in the coverage range of the frequency band with higher frequency points can simultaneously communicate with the base station 40 by using two frequency bands.
  • the user equipment 50 that is in the coverage of the frequency band with a higher frequency point can communicate with the base station 40 only in the frequency band with a lower frequency point.
  • the data packets sent and received by the user equipment in the coverage of the base station 40 are communicated with the core network through the base station 40. That is, the downlink data of the user equipment 50 is sent from the core network to the base station 40, and the base station 40 can utilize one or more The frequency band is sent directly to the user equipment 50.
  • Example ten
  • FIG. 16 is a schematic diagram of a signaling flow of an adaptive retransmission method according to Embodiment 10 of the present invention.
  • the adaptive retransmission method is applied to the communication system described in Embodiment 9, and is applicable to a scenario in which the user equipment is in the coverage of the lowest frequency band of the base station in the communication system.
  • Embodiment 10 of the present invention takes the communication between the base station and the user equipment by using the 5 GHz frequency band and the 28 Ghz frequency band as an example. Bright.
  • the adaptive retransmission method includes the following steps:
  • Step S1001 The base station schedules radio resources on the 28 GHz band for the data packet.
  • the base station includes: a PDCP layer, an RLC layer, a MAC layer, and a PHY layer.
  • the data packet is first processed by the PDCP layer and the RLC layer of the base station, and then the MAC layer of the base station schedules the radio resources on the 28 GHz band for the data packet.
  • Step S1002 The base station sends the data packet to the user equipment by using the radio resource in the scheduled 28 GHz frequency band.
  • the PHY layer of the base station transmits the data packet to the user equipment using the MAC layer of the base station for the radio resources on the 28 GHz band scheduled by the data packet.
  • Step S1003 The base station caches the data packet.
  • the RLC layer of the base station buffers the data packet sent to the user equipment, so that when the base station fails to send the data packet to the user equipment, the data packet is sent to the user equipment again.
  • Step S1004 The user equipment determines whether the data packet is successfully sent.
  • Step S1005 The user equipment sends feedback information to the base station.
  • the feedback information is ACK information; if the user equipment determines that the data packet fails to be sent, the feedback information is NACK information.
  • step S1006 is performed.
  • step S1007 to step S1009 are performed.
  • Step S1006 The base station deletes the cached data packet.
  • the MAC layer of the base station determines the identifier of the data packet, and reports that the data packet corresponding to the identifier of the RLC layer of the base station has been successfully sent, and then the RLC layer of the base station deletes and caches the identifier corresponding to the identifier. data pack.
  • Step S1007 The base station acquires the buffered data packet.
  • the MAC layer of the base station determines the identifier of the data packet, and reports the failure of the data packet corresponding to the identifier of the RLC layer of the base station, and then the RLC of the base station.
  • the layer sends the buffered data packet corresponding to the identifier to the MAC layer of the base station.
  • Step S1008 The base station schedules radio resources on the 5 GHz band for the data packet.
  • the MAC layer of the base station After the MAC layer of the base station acquires the data packet, the MAC layer of the base station schedules the radio resource on the 5 GHz band for the data packet.
  • the base station may include two MAC layers, where one MAC layer schedules radio resources on the 28 GHz band for the data packet, and another MAC layer schedules radio resources on the 5 GHz band for the data packet, thereby improving the base station as data.
  • the efficiency of packet scheduling wireless resources may include two MAC layers, where one MAC layer schedules radio resources on the 28 GHz band for the data packet, and another MAC layer schedules radio resources on the 5 GHz band for the data packet, thereby improving the base station as data. The efficiency of packet scheduling wireless resources.
  • Step S1009 The base station sends the data packet to the user equipment by using the radio resource on the scheduled 5 GHz band.
  • the PHY layer of the base station uses the MAC layer of the base station to transmit the data packet to the user equipment for the radio resources in the 5 GHz band scheduled by the data packet.
  • the user equipment may perform step S1004 to step S1009 again.
  • the base station first uses the radio resource on the first frequency band to send a data packet to the user equipment. If the data packet fails to be transmitted, the base station reuses the radio resource on the second frequency band.
  • the user equipment sends the data packet.
  • the data packet sent by the base station for the first time is sent to the user equipment by using the radio resource on the first frequency band, and when the data packet is retransmitted, the data packet is sent to the user equipment by using the radio resource on the second frequency band, that is, The first time the data packet is sent and retransmitted is in a different frequency band.
  • FIG. 17 is a schematic diagram of a signaling flow of an adaptive retransmission method according to Embodiment 11 of the present invention.
  • the adaptive retransmission method is applied to the communication system described in Embodiment 9, and is applicable to a scenario in which the user equipment is in the coverage of the lowest frequency band of the base station in the communication system.
  • the communication between the base station and the user equipment using the 5 GHz frequency band and the 28 Ghz frequency band is taken as an example for description.
  • the adaptive retransmission method includes the following steps:
  • Step S1101 The base station schedules radio resources on the 28 GHz band for the data packet.
  • the base station includes: a PDCP layer, an RLC layer, a MAC layer, and a PHY layer.
  • the data packet is first processed by the PDCP layer and the RLC layer of the base station, and then the MAC layer of the base station schedules the radio resources on the 28 GHz band for the data packet.
  • Step S1102 The base station sends the data packet to the user equipment by using the radio resource in the scheduled 28 GHz frequency band.
  • the PHY layer of the base station transmits the data packet to the user equipment using the MAC layer of the base station for the radio resources on the 28 GHz band scheduled by the data packet.
  • Step S1103 The base station caches the data packet.
  • the RLC layer of the base station buffers the data packet sent to the user equipment, so that when the base station fails to send the data packet to the user equipment, the data packet is sent to the user equipment again.
  • Step S1104 The base station acquires the buffered data packet.
  • the MAC layer of the base station determines the identifier of the data packet, and reports the data packet corresponding to the identifier of the RLC layer of the base station, and then the RLC layer of the base station sends the buffered data packet corresponding to the identifier to the MAC layer of the base station.
  • Step S1105 The base station schedules radio resources on the 5 GHz band for the data packet.
  • the MAC layer of the base station After the MAC layer of the base station acquires the data packet, the MAC layer of the base station schedules the radio resource on the 5 GHz band for the data packet.
  • the base station may include two MAC layers, where one MAC layer schedules radio resources on the 28 GHz band for the data packet, and the other MAC layer advertises the 5 GHz band for the data packet. Radio resources, thereby improving the efficiency of the base station for scheduling radio resources for data packets.
  • the base station acquires the buffered data packet before receiving the feedback information, and invokes the radio resource in the 5 GHz frequency band for the data packet. If the received feedback information is the NACK information, the base station does not need to wait for the base station to schedule the radio resource for the data packet, and the direct utilization is already used. The radio resource on the 5 GHz band scheduled by the packet transmits the packet, thereby reducing the time to retransmit the packet.
  • Step S1106 The user equipment determines whether the data packet is successfully sent.
  • Step S1107 The user equipment sends feedback information to the base station.
  • the feedback information is ACK information; if the user equipment determines that the data packet fails to be sent, the feedback information is NACK information.
  • step S1108 is performed.
  • step S1109 is performed.
  • Step S1108 The base station deletes the buffered data packet.
  • the MAC layer of the base station determines the identifier of the data packet, and reports that the data packet corresponding to the identifier of the RLC layer of the base station has been successfully sent, and then the RLC layer of the base station deletes and caches the identifier corresponding to the identifier. data pack.
  • Step S1109 The base station sends the data packet to the user equipment by using the radio resource in the scheduled 5 GHz band.
  • the PHY layer of the base station uses the MAC layer of the base station to send the data packet to the user equipment for the radio resource in the 5 GHz frequency band scheduled by the data packet.
  • the user equipment may perform step S1104 to step S1109 again.
  • the base station first uses the radio resource in the first frequency band to send a data packet to the user equipment. If the data packet fails to be transmitted, the base station reuses the radio resource in the second frequency band. The packet is sent to the user equipment.
  • the data packet sent by the base station for the first time is sent to the user equipment by using the radio resource on the first frequency band, and when the data packet is retransmitted, the data packet is sent to the user equipment by using the radio resource on the second frequency band, that is, For the first time
  • the sending and resending of the data packet are in different frequency bands. Therefore, when the base station schedules the radio resource of the first frequency band for the data packet, there is no need to consider the radio resources required for retransmitting the data packet, which can effectively reduce the radio resources.
  • the complexity of the scheduling algorithm is possible to reduce the radio resources.
  • RAM random access memory
  • ROM read-only memory
  • EEPROM electrically programmable ROM
  • EEPROM electrically erasable programmable ROM
  • registers hard disk, removable disk, CD-ROM, or technical field Any other form of storage medium known.

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Abstract

本发明涉及一种基站、用户设备及自适应重传方法。该基站包括：发送单元，用于利用第一频段上的无线资源向用户设备发送数据包；接收单元，用于接收所述用户设备发送的反馈信息，所述反馈信息用于指示所述数据包是否发送成功；所述发送单元，还用于若所述反馈信息指示所述数据包发送失败，利用第二频段上的无线资源向用户设备发送所述数据包；所述第一频段和第二频段具有重叠的覆盖范围，所述用户设备处于所述重叠的覆盖范围内。

Description

说 明 书 基站、 用户设备及自适应重传方法 技术领域
本发明涉及通信技术领域， 尤其涉及一种基站、 用户设备及自适应重传 方法。 背景技术
在现有的通信系统中， 每个基站都具有自适应重传功能， 当基站发送至 用户设备的数据包发送失败时， 基站重新向用户设备发送该数据包， 以保证 用户设备能够正确接收到该数据包。 基站在首次发送和重新发送数据包时利 用的是相同频段上的无线资源， 因此， 基站在首次发送数据包， 为数据包调 度无线资源时， 需要考虑重传数据包所需的无线资源， 从而导致无线资源调 度的算法较为复杂。 并且， 由于每个基站都需要具有自适应重传功能， 需要 配备重传调度、 緩沖等模块， 使得整个通信系统的构造成本较高。 发明内容
有鉴于此， 本发明实施例提供一种基站、 用户设备及自适应重传方法， 可有效降低对于无线资源调度的算法的复杂度， 同时有效降低通信系统的构 造成本。
在第一方面， 本发明实施例提供一种基站， 该基站包括：
发送单元， 用于利用第一频段上的无线资源向用户设备发送数据包； 接收单元， 用于接收所述用户设备发送的反馈信息， 所述反馈信息用于 指示所述数据包是否发送成功；
所述发送单元， 还用于若所述反馈信息指示所述数据包发送失败， 利用 第二频段上的无线资源向用户设备发送所述数据包；
所述第一频段和第二频段具有重叠的覆盖范围， 所述用户设备处于所述 重叠的覆盖范围内。
在第一方面的第一种可能实现的方式中， 所述发送单元具体用于： 向小 基站发送所述数据包， 以使小基站利用第一频段上的无线资源向用户设备发 送所述数据包。
结合第一方面的第一种可能实现的方式， 在第二种可能实现的方式中， 所述基站还包括： 第一调度单元， 用于在所述利用第一频段上的无线资源向 用户设备发送数据包之前， 为所述数据包调度第一频段上的无线资源； 所述 发送单元， 还用于向小基站发送调用信息， 所述调用信息包括： 为所述数据 包调度的第一频段上的无线资源的信息， 以使所述小基站根据所述调度信息 利用所述调度的第一频段上的无线资源向用户设备发送所述数据包。
结合第一方面的第一种可能实现的方式， 在第三种可能实现的方式中， 所述接收单元， 还用于在所述发送单元向用户设备发送数据包之后， 接收所 述小基站发送的数据包信息， 所述数据包信息包括： 所述数据包的标识。
结合第一方面或第一方面的第一种可能实现的方式或第一方面的第二种 可能实现的方式或第一方面的第三种可能实现的方式， 在第四种可能实现的 方式中， 所述基站还包括： 获取单元， 用于在所述接收单元接收所述用户设 备发送的反馈信息之前， 根据数据包的标识获取緩存的所述数据包； 第二调 度单元， 用于为所述数据包调度第二频段上的无线资源。
结合第一方面或第一方面的第一种可能实现的方式或第一方面的第二种 可能实现的方式或第一方面的第三种可能实现的方式， 在第五种可能实现的 方式中， 所述基站还包括： 获取单元， 用于在所述接收单元接收所述用户设 备发送的反馈信息之后， 根据数据包的标识获取緩存的所述数据包； 第二调 度单元， 用于为所述数据包调度第二频段上的无线资源。
结合第一方面或第一方面的第一种可能实现的方式或第一方面的第二种 可能实现的方式或第一方面的第三种可能实现的方式或第一方面的第四种可 能实现的方式或第一方面的第五种可能实现的方式， 在第六种可能实现的方 式中， 所述第一频段高于所述第二频段。
在第二方面， 本发明实施例提供一种用户设备， 该用户设备包括： 接收单元， 用于接收基站利用第一频段上的无线资源发送的数据包； 确定单元， 用于确定所述数据包是否发送成功；
发送单元， 用于向所述基站发送反馈信息， 所述反馈信息用于指示所述 数据包是否发送成功；
所述接收单元， 还用于若所述反馈信息指示所述数据包发送失败， 接收 所述基站利用第二频段上的无线资源发送的所述数据包；
所述第一频段和第二频段具有重叠的覆盖范围， 所述用户设备处于所述 重叠的覆盖范围内。
在第二方面的第一种可能实现的方式中， 所述发送单元具体用于： 通过 小基站向所述基站发送反馈信息。
结合第二方面或第二方面的第一种可能实现的方式， 在第二种可能实现 的方式中， 所述第一频段高于所述第二频段。
在第三方面， 本发明实施例提供一种自适应重传方法， 该方法包括： 利用第一频段上的无线资源向用户设备发送数据包；
接收所述用户设备发送的反馈信息， 所述反馈信息用于指示所述数据包 是否发送成功；
若所述反馈信息指示所述数据包发送失败， 利用第二频段上的无线资源 向用户设备发送所述数据包；
所述第一频段和第二频段具有重叠的覆盖范围， 所述用户设备处于所述 重叠的覆盖范围内。
在第三方面的第一种可能实现的方式中， 所述利用第一频段上的无线资 源向用户设备发送数据包具体为： 向小基站发送所述数据包， 以使小基站利 用第一频段上的无线资源向用户设备发送所述数据包。
结合第三方面的第一种可能实现的方式， 在第二种可能实现的方式中， 在所述利用第一频段上的无线资源向用户设备发送数据包之前， 所述方法还 包括： 为所述数据包调度第一频段上的无线资源； 向小基站发送调用信息， 所述调用信息包括： 为所述数据包调度的第一频段上的无线资源的信息， 以 使所述小基站根据所述调度信息利用所述调度的第一频段上的无线资源向用 户设备发送所述数据包。
结合第三方面的第一种可能实现的方式， 在第三种可能实现的方式中， 在所述利用第一频段上的无线资源向用户设备发送数据包之后， 所述方法还 包括： 接收所述小基站发送的数据包信息， 所述数据包信息包括： 所述数据 包的标识。
结合第三方面或第三方面的第一种可能实现的方式或第三方面的第二种 可能实现的方式或第三方面的第三种可能实现的方式， 在第四种可能实现的 方式中， 在所述接收所述用户设备发送的反馈信息之前， 所述方法还包括： 根据数据包的标识获取緩存的所述数据包； 为所述数据包调度第二频段上的 无线资源。
结合第三方面或第三方面的第一种可能实现的方式或第三方面的第二种 可能实现的方式或第三方面的第三种可能实现的方式， 在第五种可能实现的 方式中， 在所述接收所述用户设备发送的反馈信息之后， 所述方法还包括： 根据数据包的标识获取緩存的所述数据包； 为所述数据包调度第二频段上的 无线资源。
结合第三方面或第三方面的第一种可能实现的方式或第三方面的第二种 可能实现的方式或第三方面的第三种可能实现的方式或第三方面的第四种可 能实现的方式或第三方面的第五种可能实现的方式， 在第六种可能实现的方 式中， 所述第一频段高于所述第二频段。
通过上述方案， 基站首先利用第一频段上的无线资源向用户设备发送数 据包， 如果该数据包发送失败， 再利用第二频段上的无线资源向用户设备发 送该数据包。 由于基站首次发送的数据包是利用第一频段上的无线资源发送 至用户设备的， 而在重新发送该数据包时， 是利用第二频段上的无线资源发 送至用户设备的， 也就是说， 首次发送和重新发送该数据包是在不同的频段 上， 因此， 在基站为数据包调度第一频段的无线资源时， 无需考虑重传该数 据包时所需的无线资源， 可有效降低对于无线资源调度的算法的复杂度。 附图说明
图 1为本发明实施例一提供的一种基站的结构示意图；
图 2为本发明实施例一提供的另一种基站的结构示意图；
图 3为本发明实施例一提供的又一种基站的结构示意图；
图 4为本发明实施例二提供的一种用户设备的结构示意图；
图 5为本发明实施例三提供的一种自适应重传方法的流程示意图； 图 6为本发明实施例四提供的一种通信系统的架构示意图；
图 7为本发明实施例五提供的一种自适应重传方法的信令流程示意图； 图 8为本发明实施例五提供的另一种自适应重传方法的信令流程示意图； 图 9为本发明实施例六提供的一种自适应重传方法的信令流程示意图； 图 10 为本发明实施例六提供的另一种自适应重传方法的信令流程示意 图；
图 11为本发明实施例七提供的一种自适应重传方法的信令流程示意图； 图 12 为本发明实施例七提供的另一种自适应重传方法的信令流程示意 图；
图 1 3为本发明实施例八提供的一种自适应重传方法的信令流程示意图； 图 14 为本发明实施例八提供的另一种自适应重传方法的信令流程示意 图；
图 15为本发明实施例九提供的一种通信系统的架构示意图； 图 16为本发明实施例十提供的一种自适应重传方法的信令流程示意图； 图 17 为本发明实施例十一提供的一种自适应重传方法的信令流程示意
具体实施方式
为了使本发明的目的、 技术方案和优点更加清楚， 下面将结合附图对本 发明作进一步地详细描述， 显然， 所描述的实施例仅仅是本发明一部份实施 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 没有做出创造性劳动前提下所获得的所有其它实施例， 都属于本发明保护的 范围。
实施例一
如图 1 所示， 其为本发明实施例一提供的一种基站的结构示意图。 该基 站包括： 发送单元 110和接收单元 120。
发送单元 110用于利用第一频段上的无线资源向用户设备发送数据包。 接收单元 120用于接收用户设备发送的反馈信息， 该反馈信息用于指示 所述数据包是否发送成功。
发送单元 110还用于若该反馈信息指示所述数据包发送失败， 利用第二 频段上的无线资源发送向用户设备发送该数据包。
其中， 第一频段和第二频段具有重叠的覆盖范围， 用户设备处于所述重 叠的覆盖范围内。
进一步地， 发送单元 11 Q具体用于：
向小基站发送所述数据包， 以使小基站利用第一频段上的无线资源向用 户设备发送所述数据包。
进一步地， 如图 2所示， 该基站还可以包括： 第一调度单元 130。
第一调度单元 130用于在利用第一频段上的无线资源向用户设备发送数 据包之前， 为数据包调度第一频段上的无线资源。 相应的， 发送单元 110还 用于向小基站发送调用信息， 该调用信息包括： 为所述数据包调度的第一频 段上的无线资源的信息， 以使小基站根据该调度信息利用调度的第一频段上 的无线资源向用户设备发送所述数据包。
进一步地， 接收单元 120还用于在利用第一频段上的无线资源向用户设 备发送数据包之后， 接收小基站发送的数据包信息， 该数据包信息包括： 所 述数据包的标识。
进一步地， 如图 3所示， 该基站还可以包括： 获取单元 140和第二调度 单元 150。
获取单元 140用于在接收单元 120接收用户设备发送的反馈信息之前或 者在接收单元 120接收用户设备发送的反馈信息之后， 根据数据包的标识获 取緩存的所述数据包； 第二调度单元 150用于为所述数据包调度第二频段上 的无线资源。
进一步地， 其中， 第一频段高于第二频段。
在硬件实现上， 以上发送单元 110可以为发射机或收发机， 以上接收 单元 120可以为接收机或收发机， 且该发送单元 110和接收单元 120可以 集成在一起构成收发单元， 对应于硬件实现为收发机。 以上第一调度单元 130,获取单元 140及第二调度单元 150可以以硬件形式内嵌于或独立于基 站的处理器中， 也可以以软件形式存储于基站的存储器中， 以便于处理器 调用执行以上各个模块对应的操作。该处理器可以为中央处理单元（ CPU ) , 微处理器、 单片机等。
利用本发明实施例一提供的基站， 基站首先利用第一频段上的无线资源 向用户设备发送数据包， 如果该数据包发送失败， 再利用第二频段上的无线 资源向用户设备发送该数据包。 由于基站首次发送的数据包是利用第一频段 上的无线资源发送至用户设备的， 而在重新发送该数据包时， 是利用第二频 段上的无线资源发送至用户设备的， 也就是说， 首次发送和重新发送该数据 包是在不同的频段上， 因此， 在基站为数据包调度第一频段的无线资源时， 无需考虑重传该数据包时所需的无线资源， 可有效降低对于无线资源调度的 算法的复杂度。 实施例二
如图 4 所示， 其为本发明实施例二提供的一种用户设备的结构示意图。 该用户设备包括： 接收单元 210 , 确定单元 220和发送单元 230。
接收单元 210用于接收基站利用第一频段上的无线资源发送的数据包。 发送单元 230用于向基站发送反馈信息， 该反馈信息用于指示所述数据 包是否发送成功。
接收单元 210还用于若该反馈信息指示所述数据包发送失败， 接收基站 利用第二频段上的无线资源发送的所述数据包。
其中， 第一频段和第二频段具有重叠的覆盖范围， 所述用户设备处于所 述重叠的覆盖范围内。 第一频段和第二频段的具有重叠的覆盖范围可以表现 为很多种形式， 例如， 第一频段和第二频段的部分覆盖范围重叠， 或其中一 个频段的覆盖范围处于另一个频段的覆盖范围内等等。
进一步地， 发送单元 230具体用于： 通过小基站向基站发送反馈信息。 进一步地， 其中， 第一频段高于第二频段。
在硬件实现上， 以上接收单元 210可以为接收机或收发机， 以上发送单 元 230可以为发射机或收发机， 且该接收单 210和发送单元 230可以集成在 一起构成收发单元， 对应于硬件实现为收发机。 以上确定单元 220可以以硬 件形式内嵌于或独立于用户设备的处理器中， 也可以以软件形式存储于基站 的存储器中， 以便于处理器调用执行以上各个模块对应的操作。 该处理器可 以为中央处理单元（CPU )、 微处理器、 单片机等。
利用本发明实施例二提供的用户设备， 用户设备首先接收基站利用第一 频段上的无线资源发送的数据包， 如果该数据包发送失败， 用户设备再接收 基站利用第二频段上的无线资源发送的该数据包。 由于基站首次发送的数据 包是利用第一频段上的无线资源发送至用户设备的， 而在重新发送该数据包 时， 是利用第二频段上的无线资源发送至用户设备的， 也就是说， 首次发送 和重新发送该数据包是在不同的频段上， 因此， 在基站为数据包调度第一频 段的无线资源时， 无需考虑重传该数据包时所需的无线资源， 可有效降低对 于无线资源调度的算法的复杂度。 实施例三
如图 5所示， 其为本发明实施例三提供的一种自适应重传方法的流程示 意图。 该自适应重传方法的执行主体为基站， 可以具体为本发明实施例一提 供的基站。
该自适应重传方法包括以下步骤：
步骤 S 301 , 利用第一频段上的无线资源向用户设备发送数据包。
步骤 S 302，接收用户设备发送的反馈信息，该反馈信息用于指示数据包是 否发送成功。
步骤 S 303，若该反馈信息指示所述数据包发送失败，利用第二频段上的无 线资源发送向用户设备发送该数据包。
其中， 第一频段和第二频段具有重叠的覆盖范围， 用户设备处于所述重 叠的覆盖范围内。
进一步地， 步骤 S 301 , 利用第一频段上的无线资源向用户设备发送数据 包具体为：
向小基站发送数据包， 以使小基站利用第一频段上的无线资源向用户设 备发送所述数据包。
进一步地， 在步骤 S 301 , 利用第一频段上的无线资源向用户设备发送数 据包之前， 该方法还包括： 为该数据包调度第一频段上的无线资源； 向小基 站发送调用信息， 该调用信息包括： 为该数据包调度的第一频段上的无线资 源的信息， 以使小基站根据该调度信息利用调度的第一频段上的无线资源向 用户设备发送该数据包。
进一步地， 在步骤 S 301 , 所利用第一频段上的无线资源向用户设备发送 数据包之后， 该方法还包括：
接收小基站发送的数据包信息， 该数据包信息包括： 该数据包的标识。 进一步地， 在步骤 S 302 , 接收用户设备发送的反馈信息之前， 该方法还 包括：
根据该数据包的标识获取緩存的该数据包； 为该数据包调度第二频段上 的无线资源。
进一步地， 在步骤 S 302 , 接收用户设备发送的反馈信息之后， 该方法还 包括：
根据该数据包的标识获取緩存的该数据包； 为该数据包调度第二频段上 的无线资源。
进一步地， 其中， 第一频段高于第二频段。
利用本发明实施例三提供的自适应重传方法， 基站首先利用第一频段上 的无线资源向用户设备发送数据包， 如果该数据包发送失败， 再利用第二频 段上的无线资源向用户设备发送该数据包。 由于基站首次发送的数据包是利 用第一频段上的无线资源发送至用户设备的， 而在重新发送该数据包时， 是 利用第二频段上的无线资源发送至用户设备的， 也就是说， 首次发送和重新 发送该数据包是在不同的频段上， 因此， 在基站为数据包调度第一频段的无 线资源时， 无需考虑重传该数据包时所需的无线资源， 可有效降低对于无线 资源调度的算法的复杂度。 实施例四
如图 6所示， 其为本发明实施例四提供的一种通信系统的架构示意图。 该通信系统包括： 基站 1 0 , 小基站 20和用户设备 30。 其中， 该基站 1 0可以 为本发明实施例一提供的基站， 用户设备 30可以为本发明实施例二提供的用 户设备。
基站 10采用频点较低的频段（例如： 3.5GHz、 5GHz )覆盖相对较大 的区域。 在基站 10覆盖范围内， 布置多个小基站 20进行热点覆盖， 小基 站 20采用频点较高的频段（例如： 28GHz、 38GHz )覆盖相对较小的区域。 在基站 10覆盖范围内且在小基站 10覆盖范围内的用户设备 30可以通过一 个或者多个频段同时与基站 10和小基站 20进行通信。
例如， 用户设备 30可以通过 5GHz频段跟基站 10进行通信， 同时还 可以通过 28GHz频段跟小基站 20进行通信； 或者， 用户设备 30可以通过 3.5GHz和 5GHz两个频段跟基站 10进行通信， 同时还通过 28GHz频段跟 小基站 20进行通信； 或者， 用户设备 30可以通过 5GHz频段跟基站 10进 行通信， 同时还可以通过 28GHz和 38GHz频段跟小基站 20进行通信。
在基站 10覆盖范围内的用户设备 30收发的数据均通过基站 10与核心 网进行交互， 也就说用户设备 30的下行数据从核心网下发到基站 10, 基 站 10将数据通过频点较低的频段直接传输给用户设备 30, 或者基站 10将 数据通过频点较高的频段或者有线光纤先传输到小基站 20,然后小基站 20 再通过频点较高的频段传输给用户设备 30。 实施例五
如图 7所示， 其为本发明实施例五提供的一种自适应重传方法的信令流 程示意图。 该自适应重传方法应用于实施例四所述的通信系统， 适用于在该 通信系统中， 用户设备处于基站和小基站重叠的覆盖范围内的场景。 本发明 实施例五以基站与用户设备之间利用 5GHz频段通信， 小基站与用户设备之间 利用 28GHz频段通信为例进行说明。
该自适应重传方法包括以下步骤：
步骤 S501 , 基站向小基站发送数据包。 基站包括： 分组数据汇聚协议（Packet Data Convergence Protocol, PDCP )层，无线链路控制（ Radio Link Control, RLC )层，介质访问控制（ Medium Access Control, MAC )层和物理（Physical, PHY)层。 数据包首先经过基 站的 PDCP层和 RLC层的处理， 再发送至小基站。
步骤 S502,基站緩存该数据包。
基站的 RLC层緩存该发送至小基站的数据包， 以便在小基站向用户设备 发送该数据包失败时， 再次向用户设备发送该数据包。
步骤 S503, 小基站为该数据包调度 28GHz频段上的无线资源。
由于小基站接收到的数据包已经是由基站的 PDCP层和 RLC层处理过的数 据包， 因此小基站不需要具有 PDCP层和 RLC层， 只需要包括 MAC层和 PHY层 即可， 可有效降低小基站的构造成本， 从而降低整个通信系统的构造成本。
小基站在接收到数据包后， 小基站的 MAC层为数据包调度 28GHz频段上 的无线资源。
步骤 S504, 小基站利用调度的 28GHz频段上的无线资源向用户设备发送 该数据包。
在小基站的 MAC层为数据包调度 28GHz频段上的无线资源之后， 小基站 的 PHY层利用小基站的 MAC层为该数据包调度的 28GHz频段上的无线资源向 用户设备发送该数据包。
步骤 S505, 小基站向基站发送数据包信息。
该数据包信息包括： 小基站向用户设备发送的数据包的标识， 以便告知 基站已经被小基站发送至用户设备的数据包。
步骤 S506,用户设备确定该数据包是否发送成功。
步骤 S507, 用户设备向基站发送反馈信息。
具体的， 如果用户设备确定该数据包发送成功， 则该反馈信息为应答 (Acknowledgement, ACK)信息； 如果用户设备确定该数据包发送失败， 则 该反馈信息为否定应答 ( Negative Acknowledgement, NACK )信息。 反馈信息为 ACK信息时， 执行步骤 S508。
反馈信息为 NACK信息时， 执行步骤 S509到步骤 S511。
可选地， 步骤 S507可分两步进行， 如图 8所示， 步骤 S507包括： 步骤 S507a，用户设备向小基站发送反馈信息。
步骤 S507b，小基站向基站发送该反馈信息。
步骤 S508,基站删除緩存的该数据包。
当基站接收到用户设备发送的 ACK信息时， 基站的 MAC层根据用户设备 发送的反馈信息， 确定该数据包的标识， 并上 基站的 RLC层该标识对应的 数据包已发送成功， 然后基站的 RLC层删除緩存该标识对应的数据包。
步骤 S509 , 基站获取緩存的该数据包。
当基站接收到用户设备发送的 NACK信息时，基站的 MAC层根据用户设备 发送的反馈信息， 确定该数据包的标识， 并上 基站的 RLC层该标识对应的 数据包发送失败， 然后基站的 RLC层将緩存的该标识对应的数据包发送至基 站的 MAC层。
步骤 S510 , 基站为该数据包调度 5GHz频段上的无线资源。
在基站的 MAC层获取到该数据包后， 基站的 MAC层为该数据包调度 5GHz 频段上的无线资源。
基站在接收到反馈信息且反馈信息为 NACK信息时，再开始获取緩存的数 据包， 为该数据包调用 5GHz频段上的无线资源， 即基站只为需要重传的数据 包调度 5GHz频段上的无线资源， 可以提高无线资源的利用率。
步骤 S511 ,基站利用调度的 5GHz频段上的无线资源向用户设备发送该数 据包。
在基站的 MAC层为数据包调度 5GHz频段上的无线资源之后， 基站的 PHY 层利用基站的 MAC层为该数据包调度的 5GHz频段上的无线资源向用户设备发 送该数据包。
可以理解的是， 用户设备在接收到基站重新发送的该数据包之后， 可再 次执行步骤 S506到步骤 S511。
通过利用本发明实施例五提供的自适应重传方法， 由于基站首次发送的 数据包是通过小基站利用第一频段（28GHz )上的无线资源发送至用户设备的， 而在重新发送该数据包时， 是利用第二频段（5GHz )上的无线资源发送至用 户设备的， 也就是说， 首次发送和重新发送该数据包是在不同的频段上， 因 此， 在小基站为数据包调度无线资源时， 无需考虑重传该数据包时所需的无 线资源， 可有效降低对于无线资源调度的算法的复杂度。 并且， 由于只需要 基站具有重传功能， 不需要小基站具有重传功能， 可有效降低通信系统的构 造成本。 实施例六
如图 9所示， 其为本发明实施例六提供的一种自适应重传方法的信令流 程示意图。 该自适应重传方法应用于实施例四所述的通信系统， 适用于在该 通信系统中， 用户设备处于基站和小基站重叠的覆盖范围内的场景。 本发明 实施例六以基站与用户设备之间利用 5GHz频段通信， 小基站与用户设备之间 利用 28GHz频段通信为例进行说明。
该自适应重传方法包括以下步骤：
步骤 S601 , 基站向小基站发送数据包。
基站包括： PDCP层， RLC层， MAC层和 PHY层。 数据包首先经过基站的 PDCP层和 RLC层的处理， 再发送至小基站。
步骤 S602，基站緩存该数据包。
基站的 RLC层緩存该发送至小基站的数据包， 以便在小基站向用户设备 发送该数据包失败时， 再次向用户设备发送该数据包。
步骤 S603 , 小基站为该数据包调度 28GHz频段上的无线资源。
由于小基站接收到的数据包已经是由基站的 PDCP层和 RLC层处理过的数 据包， 因此小基站不需要具有 PDCP层和 RLC层， 只需要包括 MAC层和 PHY层 即可， 可有效降低小基站的构造成本， 从而降低整个通信系统的构造成本。 小基站在接收到数据包后， 小基站的 MAC层为数据包调度 28GHz频段上 的无线资源。
步骤 S604 , 小基站利用调度的 28GHz频段上的无线资源向用户设备发送 该数据包。
在小基站的 MAC层为数据包调度 28GHz频段上的无线资源之后， 小基站 的 PHY层利用小基站的 MAC层为该数据包调度的 28GHz频段上的无线资源向 用户设备发送该数据包。
步骤 S605 , 小基站向基站发送数据包信息。
该数据包信息包括： 小基站向用户设备发送的数据包的标识， 以便告知 基站已经被小基站发送至用户设备的数据包。
步骤 S606 , 基站获取緩存的该数据包。
基站的 MAC层根据用户设备发送的反馈信息， 确定该数据包的标识， 并 上报给基站的 RLC层， 然后基站的 RLC层将緩存的该标识对应的数据包发送 至基站的 MAC层。
步骤 S607 , 基站为该数据包调度 5GHz频段上的无线资源。
在基站的 MAC层获取到该数据包后， 基站的 MAC层为该数据包调度 5GHz频段 上的无线资源。
基站在接收反馈信息之前获取緩存的数据包，为该数据包调用 5GHz频段 上的无线资源， 若接收到的反馈信息为 NACK信息， 无需等待基站为该数据包 调度无线资源， 直接利用已经为该数据包调度的 5GHz频段上的无线资源发送 该数据包， 从而减少重传该数据包的时间。
步骤 S608,用户设备确定该数据包是否发送成功。
步骤 S609 , 用户设备向基站发送反馈信息。
具体的， 如果用户设备确定该数据包发送成功， 则该反馈信息为 ACK信 息； 如果用户设备确定该数据包发送失败， 则该反馈信息为 NACK信息。 反馈信息为 ACK信息时， 执行步骤 S 61 0。
反馈信息为 NACK信息时， 执行步骤 S61 1。
可选地， 步骤 S609可分两步进行， 如图 1 0所示， 步骤 S609包括： 步骤 S609a，用户设备向小基站发送反馈信息。
步骤 S609b，小基站向基站发送该反馈信息。
步骤 S61 0,基站删除緩存的该数据包。
当基站接收到用户设备发送的 ACK信息时， 基站的 MAC层根据用户设备 发送的反馈信息， 确定该数据包的标识， 并上 基站的 RLC层该标识对应的 数据包已发送成功， 然后基站的 RLC层删除緩存该标识对应的数据包。
步骤 S61 1 ,基站利用调度的 5GHz频段上的无线资源向用户设备发送该数 据包。
当基站接收到用户设备发送的 NACK信息时，基站的 PHY层利用基站的 MAC 层为该数据包调度的 5GHz频段上的无线资源向用户设备发送该数据包。
可以理解的是， 用户设备在接收到基站重新发送的该数据包之后， 可再 次执行步骤 S606到步骤 S61 1。
通过利用本发明实施例六提供的自适应重传方法， 由于基站首次发送的 数据包是通过小基站利用第一频段（28GHz )上的无线资源发送至用户设备的， 而在重新发送该数据包时， 是利用第二频段（5GHz )上的无线资源发送至用 户设备的， 也就是说， 首次发送和重新发送该数据包是在不同的频段上， 因 此， 在小基站为数据包调度无线资源时， 无需考虑重传该数据包时所需的无 线资源， 可有效降低对于无线资源调度的算法的复杂度。 并且， 由于只需要 基站具有重传功能， 不需要小基站具有重传功能， 可有效降低通信系统的构 造成本。 实施例七
如图 1 1所示，其为本发明实施例七提供的一种自适应重传方法的信令流 程示意图。 该自适应重传方法应用于实施例四所述的通信系统， 适用于在该 通信系统中， 用户设备处于基站和小基站重叠的覆盖范围内的场景。 本发明 实施例七以基站与用户设备之间利用 5GHz频段通信， 小基站与用户设备之间 利用 28GHz频段通信为例进行说明。
该自适应重传方法包括以下步骤：
步骤 701 , 基站为数据包调度 28GHz频段上的无线资源。
基站包括： PDCP层， RLC层， MAC层和 PHY层。 数据包首先经过基站的
PDCP层和 RLC层的处理， 再由基站的 MAC层为该数据包调度 28GHz频段上的 无线资源。
步骤 S702 , 基站向小基站发送调度信息。
该调度信息包括： 基站的 MAC层为该数据包调度的 28GHz频段上的无线 资源的信息， 如数据包大小， 调制编码方式、 逻辑信道号等信息。
步骤 S703 , 基站向小基站发送数据包。
该数据包已经经过基站的 PDCP层， RLC层和 MAC层处理。
步骤 S704 , 基站緩存该数据包。
基站的 RLC层緩存该发送至小基站的数据包， 以便在小基站向用户设备 发送该数据包失败时， 再次向用户设备发送该数据包。
步骤 S705,小基站利用基站为数据包调度的 28GHz频段上的无线资源向 用户设备发送该数据包。
由于小基站接收到的数据包已经是由基站的 PDCP层， RLC层和 MAC层处 理过的数据包， 因此小基站不需要具有 PDCP层， RLC层和 MAC层， 只需要包 括 PHY层即可， 可有效降低小基站的构造成本， 从而降低整个通信系统的 构造成本。
小基站在接收到数据包后，小基站的 PHY层根据调度信息确定基站的 MAC 层为该数据包调度的 28GHz频段上的无线资源， 然后利用基站的 MAC层为该 数据包调度的 28GHz频段上的无线资源向用户设备发送该数据包。 步骤 S706 , 用户设备确定该数据包是否发送成功。
步骤 S707 , 用户设备向基站发送反馈信息。
具体的， 如果用户设备确定该数据包发送成功， 则该反馈信息为 ACK信 息； 如果用户设备确定该数据包发送失败， 则该反馈信息为 NACK信息。
反馈信息为 ACK信息时， 执行步骤 S708。
反馈信息为 NACK信息时， 执行步骤 S709到步骤 S711。
可选地， 步骤 S707可分两步进行， 如图 12所示， 步骤 S707包括： 步骤 S707a，用户设备向小基站发送反馈信息。
步骤 S707b，小基站向基站发送该反馈信息。
步骤 S708,基站删除緩存的该数据包。
当基站接收到用户设备发送的 ACK信息时， 基站的 MAC层确定该数据包 的标识， 并上报基站的 RLC层该标识对应的数据包已发送成功， 然后基站的 RLC层删除緩存该标识对应的数据包。
步骤 S709 , 基站获取緩存的该数据包。
当基站接收到用户设备发送的 NACK信息时，基站的 MAC层确定该数据包 的标识， 并上报基站的 RLC层该标识对应的数据包发送失败， 然后基站的 RLC 层将緩存的该标识对应的数据包发送至基站的 MAC层。
步骤 S710, 基站为该数据包调度 5GHz频段上的无线资源。
在基站的 MAC层获取到该数据包后， 基站的 MAC层为该数据包调度 5GHz 频段上的无线资源。
需要说明的是， 该基站可以包括两个 MAC层， 其中， 一个 MAC层为数据 包调度 28GHz频段上的无线资源， 另一个 MAC层为数据包调度 5GHz频段上的 无线资源， 从而提高基站为数据包调度无线资源的效率。
基站在接收到反馈信息且反馈信息为 NACK信息时，再开始获取緩存的数 据包， 为该数据包调用 5GHz频段上的无线资源， 即基站只为需要重传的数据 包调度 5GHz频段上的无线资源， 可以提高无线资源的利用率。 步骤 S711 ,基站利用调度的 5GHz频段上的无线资源向用户设备发送该数 据包。
在基站的 MAC层为数据包调度 5GHz频段上的无线资源之后， 基站的 PHY 层利用基站的 MAC层为该数据包调度的 5GHz频段上的无线资源向用户设备发 送该数据包。
可以理解的是， 用户设备在接收到基站重新发送的该数据包之后， 可再 次执行步骤 S706到步骤 S711。
通过利用本发明实施例七提供的自适应重传方法， 由于基站首次发送的 数据包是通过小基站利用第一频段（28GHz )上的无线资源发送至用户设备的， 而在重新发送该数据包时， 是利用第二频段（5GHz )上的无线资源发送至用 户设备的， 也就是说， 首次发送和重新发送该数据包是在不同的频段上， 因 此， 在小基站为数据包调度无线资源时， 无需考虑重传该数据包时所需的无 线资源， 可有效降低对于无线资源调度的算法的复杂度。 并且， 由于只需要 基站具有重传功能， 不需要小基站具有重传功能， 可有效降低通信系统的构 造成本。 实施例八
如图 13所示，其为本发明实施例十一提供的一种自适应重传方法的信令 流程示意图。 该自适应重传方法应用于实施例四所述的通信系统， 适用于在 该通信系统中， 用户设备处于基站和小基站重叠的覆盖范围内的场景。 本发 明实施例八以基站与用户设备之间利用 5GHz频段通信， 小基站与用户设备之 间利用 28GHz频段通信为例进行说明。
该自适应重传方法包括以下步骤：
步骤 S801 , 基站为数据包调度 28GHz频段上的无线资源。
基站包括： PDCP层， RLC层， MAC层和 PHY层。 数据包首先经过基站的
PDCP层和 RLC层的处理， 再由基站的 MAC层为该数据包调度 28GHz频段上的 无线资源。
步骤 S802 , 基站向小基站发送调度信息。
该调度信息包括： 基站的 MAC层为该数据包调度的 28GHz频段上的无线 资源的信息， 如数据包大小， 调制编码方式、 逻辑信道号等信息。
步骤 S803 , 基站向小基站发送数据包。
该数据包已经经过基站的 PDCP层， RLC层和 MAC层处理。
步骤 S804 , 基站緩存该数据包。
基站的 RLC层緩存该发送至小基站的数据包， 以便在小基站向用户设备 发送该数据包失败时， 再次向用户设备发送该数据包。
步骤 S805,小基站利用基站为数据包调度的 28GHz频段上的无线资源向 用户设备发送该数据包。
由于小基站接收到的数据包已经是由基站的 PDCP层， RLC层和 MAC层处 理过的数据包， 因此小基站不需要具有 PDCP层， RLC层和 MAC层， 只需要包 括 PHY层即可， 可有效降低小基站的构造成本， 从而降低整个通信系统的 构造成本。
小基站在接收到数据包后，小基站的 PHY层根据调度信息确定基站的 MAC 层为该数据报调度的 28GHz频段上的无线资源， 然后利用基站的 MAC层为该 数据包调度的 28GHz频段上的无线资源向用户设备发送该数据包。
步骤 S806 , 基站获取緩存的该数据包。
基站的 MAC层确定该数据包的标识， 并上报给基站的 RLC层， 然后基站 的 RLC层将緩存的该标识对应的数据包发送至基站的 MAC层。
步骤 S807 , 基站为该数据包调度 5GHz频段上的无线资源。
在基站的 MAC层获取到该数据包后， 基站的 MAC层为该数据包调度 5GHz 频段上的无线资源。
需要说明的是， 该基站可以包括两个 MAC层， 其中， 一个 MAC层为数据 包调度 28GHz频段上的无线资源， 另一个 MAC层为数据包调度 5GHz频段上的 无线资源， 从而提高基站为数据包调度无线资源的效率。
基站在接收反馈信息之前获取緩存的数据包，为该数据包调用 5GHz频段 上的无线资源， 若接收到的反馈信息为 NACK信息， 无需等待基站为该数据包 调度无线资源， 直接利用已经为该数据包调度的 5GHz频段上的无线资源发送 该数据包， 从而减少重传该数据包的时间。
步骤 S808 , 用户设备确定该数据包是否发送成功。
步骤 S809 , 用户设备向基站发送反馈信息。
具体的， 如果用户设备确定该数据包发送成功， 则该反馈信息为 ACK信 息； 如果用户设备确定该数据包发送失败， 则该反馈信息为 NACK信息。
反馈信息为 ACK信息时， 执行步骤 S810。
反馈信息为 NACK信息时， 执行步骤 S811。
可选地， 步骤 S809可分两步进行， 如图 14所示， 步骤 S809包括： 步骤 S809a，用户设备向小基站发送反馈信息。
步骤 S809b，小基站向基站发送该反馈信息。
步骤 S810,基站删除緩存的该数据包。
当基站接收到用户设备发送的 ACK信息时， 基站的 MAC层确定该数据包 的标识， 并上报基站的 RLC层该标识对应的数据包已发送成功， 然后基站的 RLC层删除緩存该标识对应的数据包。
步骤 S811 ,基站利用调度的 5GHz频段上的无线资源向用户设备发送该数 据包。
当基站接收到用户设备发送的 NACK信息时，基站的 PHY层利用基站的 MAC 层为该数据包调度的 5GHz频段上的无线资源向用户设备发送该数据包。
可以理解的是， 用户设备在接收到基站重新发送的该数据包之后， 可再 次执行步骤 S806到步骤 S811。
通过利用本发明实施例八提供的自适应重传方法， 由于基站首次发送的 数据包是通过小基站利用第一频段（28GHz )上的无线资源发送至用户设备的， 而在重新发送该数据包时， 是利用第二频段（5GHz )上的无线资源发送至用 户设备的， 也就是说， 首次发送和重新发送该数据包是在不同的频段上， 因 此， 在小基站为数据包调度无线资源时， 无需考虑重传该数据包时所需的无 线资源， 可有效降低对于无线资源调度的算法的复杂度。 并且， 由于只需要 基站具有重传功能， 不需要小基站具有重传功能， 可有效降低通信系统的构 造成本。 实施例九
如图 15所示， 其为本发明实施例九提供的一种通信系统的架构示意图。 该通信系统包括： 基站 40和用户设备 50。 该基站 40可以为实施例一提供的 基站， 用户设备 50可以为实施例二提供的用户设备。
基站 40采用至少两个频段与用户设备 50进行通信。 频点较高的频段 的覆盖范围较小， 频点较低的频段的覆盖范围较大。 如图 16 所示， 基站 40采用两个频段与用户设备 50进行通信， 处于频点较高的频段的覆盖范 围内的用户设备 50, 能够同时采用两个频段与基站 40进行通信。 而处于 频点较高的频段的覆盖范围外， 但处于频点较低的频段的覆盖范围的用户 设备 50, 只能采用频点较低的频段与基站 40进行通信。
在基站 40覆盖范围内的用户设备收发的数据包均通过该基站 40与核 心网进行交互， 也就说用户设备 50的下行数据从核心网下发到基站 40, 基站 40可利用一个或者多个频段直接发送给用户设备 50。 实施例十
如图 16所示，其为本发明实施例十提供的一种自适应重传方法的信令流 程示意图。 该自适应重传方法应用于实施例九所述的通信系统， 适用于在该 通信系统中， 用户设备处于基站的最低频段的覆盖范围内的场景。 本发明实 施例十以基站与用户设备之间利用 5GHz 频段和 28Ghz 频段通信为例进行说 明。
该自适应重传方法包括以下步骤：
步骤 S1001 , 基站为数据包调度 28GHz频段上的无线资源。
基站包括： PDCP层， RLC层， MAC层和 PHY层。 数据包首先经过基站的 PDCP层和 RLC层的处理， 再由基站的 MAC层为该数据包调度 28GHz频段上的 无线资源。
步骤 S1002 ,基站利用调度的 28GHz频段上的无线资源向用户设备发送该 数据包。
基站的 PHY层利用基站的 MAC层为该数据包调度的 28GHz频段上的无线 资源向用户设备发送该数据包。
步骤 S 1003 , 基站緩存该数据包。
基站的 RLC层緩存该发送至用户设备的数据包， 以便在基站向用户设备 发送该数据包失败时， 再次向用户设备发送该数据包。
步骤 S1004 , 用户设备确定该数据包是否发送成功。
步骤 S1005 , 用户设备向基站发送反馈信息。
具体的， 如果用户设备确定该数据包发送成功， 则该反馈信息为 ACK信 息； 如果用户设备确定该数据包发送失败， 则该反馈信息为 NACK信息。
反馈信息为 ACK信息时， 执行步骤 S1006。
反馈信息为 NACK信息时， 执行步骤 S1007到步骤 S1009。
步骤 S1006 , 基站删除緩存的该数据包。
当基站接收到用户设备发送的 ACK信息时， 基站的 MAC层确定该数据包 的标识， 并上报基站的 RLC层该标识对应的数据包已发送成功， 然后基站的 RLC层删除緩存该标识对应的数据包。
步骤 S1007 , 基站获取緩存的该数据包。
当基站接收到用户设备发送的 NACK信息时，基站的 MAC层确定该数据包 的标识， 并上报基站的 RLC层该标识对应的数据包发送失败， 然后基站的 RLC 层将緩存的该标识对应的数据包发送至基站的 MAC层。
步骤 S1008 , 基站为该数据包调度 5GHz频段上的无线资源。
在基站的 MAC层获取到该数据包后， 基站的 MAC层为该数据包调度 5GHz 频段上的无线资源。
需要说明的是， 该基站可以包括两个 MAC层， 其中， 一个 MAC层为数据 包调度 28GHz频段上的无线资源， 另一个 MAC层为数据包调度 5GHz频段上的 无线资源， 从而提高基站为数据包调度无线资源的效率。
基站在接收到反馈信息且反馈信息为 NACK信息时，再开始获取緩存的数 据包， 为该数据包调用 5GHz频段上的无线资源， 即基站只为需要重传的数据 包调度 5GHz频段上的无线资源， 可以提高无线资源的利用率。 步骤 S1009 , 基站利用调度的 5GHz频段上的无线资源向用户设备发送该数据包。
在基站的 MAC层为数据包调度 5GHz频段上的无线资源之后， 基站的 PHY 层利用基站的 MAC层为该数据包调度的 5GHz频段上的无线资源向用户设备发 送该数据包。
可以理解的是， 用户设备在接收到基站重新发送的该数据包之后， 可再 次执行步骤 S1004到步骤 S1009。
通过利用本发明实施例十提供的自适应重传方法， 基站首先利用第一频 段上的无线资源向用户设备发送数据包， 如果该数据包发送失败， 基站再利 用第二频段上的无线资源向用户设备发送该数据包。 由于基站首次发送的数 据包是利用第一频段上的无线资源发送至用户设备的， 而在重新发送该数据 包时， 是利用第二频段上的无线资源发送至用户设备的， 也就是说， 首次发 送和重新发送该数据包是在不同的频段上， 因此， 在基站为数据包调度第一 频段的无线资源时， 无需考虑重传该数据包时所需的无线资源， 可有效降低 对于无线资源调度的算法的复杂度。 实施例十一 如图 17所示，其为本发明实施例十一提供的一种自适应重传方法的信令 流程示意图。 该自适应重传方法应用于实施例九所述的通信系统， 适用于在 该通信系统中， 用户设备处于基站的最低频段的覆盖范围内的场景。 本发明 实施例十一以基站与用户设备之间利用 5GHz频段和 28Ghz频段通信为例进行 说明。
该自适应重传方法包括以下步骤：
步骤 S1101, 基站为数据包调度 28GHz频段上的无线资源。
基站包括： PDCP层， RLC层， MAC层和 PHY层。 数据包首先经过基站的 PDCP层和 RLC层的处理， 再由基站的 MAC层为该数据包调度 28GHz频段上的 无线资源。
步骤 S1102,基站利用调度的 28GHz频段上的无线资源向用户设备发送该 数据包。
基站的 PHY层利用基站的 MAC层为该数据包调度的 28GHz频段上的无线 资源向用户设备发送该数据包。
步骤 S1103, 基站緩存该数据包。
基站的 RLC层緩存该发送至用户设备的数据包， 以便在基站向用户设备 发送该数据包失败时， 再次向用户设备发送该数据包。
步骤 S1104, 基站获取緩存的该数据包。
基站的 MAC层确定该数据包的标识， 并上报基站的 RLC层该标识对应的 数据包发送失败， 然后基站的 RLC层将緩存的该标识对应的数据包发送至基 站的 MAC层。
步骤 S1105, 基站为该数据包调度 5GHz频段上的无线资源。
在基站的 MAC层获取到该数据包后， 基站的 MAC层为该数据包调度 5GHz 频段上的无线资源。
需要说明的是， 该基站可以包括两个 MAC层， 其中， 一个 MAC层为数据 包调度 28GHz频段上的无线资源， 另一个 MAC层为数据包调度 5GHz频段上的 无线资源， 从而提高基站为数据包调度无线资源的效率。
基站在接收反馈信息之前获取緩存的数据包，为该数据包调用 5GHz频段 上的无线资源， 若接收到的反馈信息为 NACK信息， 无需等待基站为该数据包 调度无线资源， 直接利用已经为该数据包调度的 5GHz频段上的无线资源发送 该数据包， 从而减少重传该数据包的时间。
步骤 S1106, 用户设备确定该数据包是否发送成功。
步骤 S1107, 用户设备向基站发送反馈信息。
具体的， 如果用户设备确定该数据包发送成功， 则该反馈信息为 ACK信 息； 如果用户设备确定该数据包发送失败， 则该反馈信息为 NACK信息。
反馈信息为 ACK信息时， 执行步骤 S1108。
反馈信息为 NACK信息时， 执行步骤 S1109。
步骤 S1108, 基站删除緩存的该数据包。
当基站接收到用户设备发送的 ACK信息时， 基站的 MAC层确定该数据包 的标识， 并上报基站的 RLC层该标识对应的数据包已发送成功， 然后基站的 RLC层删除緩存该标识对应的数据包。
步骤 S1109, 基站利用调度的 5GHz频段上的无线资源向用户设备发送该 数据包。
当基站接收到用户设备发送的 NACK信息时，基站的 PHY层利用基站的 MAC 层为该数据包调度的 5GHz频段上的无线资源向用户设备发送该数据包。
可以理解的是， 用户设备在接收到基站重新发送的该数据包之后， 可再 次执行步骤 S 1104到步骤 S 1109。
通过利用本发明实施例十一提供的自适应重传方法， 基站首先利用第一 频段上的无线资源向用户设备发送数据包， 如果该数据包发送失败， 基站再 利用第二频段上的无线资源向用户设备发送该数据包。 由于基站首次发送的 数据包是利用第一频段上的无线资源发送至用户设备的， 而在重新发送该数 据包时， 是利用第二频段上的无线资源发送至用户设备的， 也就是说， 首次 发送和重新发送该数据包是在不同的频段上， 因此， 在基站为数据包调度第 一频段的无线资源时， 无需考虑重传该数据包时所需的无线资源， 可有效降 低对于无线资源调度的算法的复杂度。
专业人员应该还可以进一步意识到， 结合本文中所公开的实施例描述的 各示例的单元及算法步骤， 能够以电子硬件、 计算机软件或者二者的结合来 实现， 为了清楚地说明硬件和软件的可互换性， 在上述说明中已经按照功能 一般性地描述了各示例的组成及步骤。 这些功能究竟以硬件还是软件方式来 执行， 取决于技术方案的特定应用和设计约束条件。 专业技术人员可以对每 个特定的应用来使用不同方法来实现所描述的功能， 但是这种实现不应认为 超出本发明的范围。
结合本文中所公开的实施例描述的方法或算法的步骤可以用硬件、 处理 器执行的软件模块， 或者二者的结合来实施。 软件模块可以置于随机存储器 ( RAM ) 、 内存、 只读存储器（ROM ) 、 电可编程 R0M、 电可擦除可编程 R0M、 寄存器、 硬盘、 可移动磁盘、 CD-ROM , 或技术领域内所公知的任意其它形式 的存储介质中。
以上所述的具体实施方式， 对本发明的目的、 技术方案和有益效果进行 了进一步详细说明， 所应理解的是， 以上所述仅为本发明的具体实施方式而 已， 并不用于限定本发明的保护范围， 凡在本发明的精神和原则之内， 所做 的任何修改、 等同替换、 改进等， 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1、 一种基站， 其特征在于， 所述基站包括：
发送单元， 用于利用第一频段上的无线资源向用户设备发送数据包； 接收单元， 用于接收所述用户设备发送的反馈信息， 所述反馈信息用于 指示所述数据包是否发送成功；
所述发送单元， 还用于若所述反馈信息指示所述数据包发送失败， 利用 第二频段上的无线资源向用户设备发送所述数据包；
所述第一频段和第二频段具有重叠的覆盖范围， 所述用户设备处于所述 重叠的覆盖范围内。
2、 根据权利要求 1所述的基站， 其特征在于， 所述发送单元具体用于： 向小基站发送所述数据包， 以使小基站利用第一频段上的无线资源向用 户设备发送所述数据包。
3、 根据权利要求 2所述的基站， 其特征在于， 所述基站还包括： 第一调度单元， 用于在所述利用第一频段上的无线资源向用户设备发送 数据包之前， 为所述数据包调度第一频段上的无线资源；
所述发送单元， 还用于向小基站发送调用信息， 所述调用信息包括： 为 所述数据包调度的第一频段上的无线资源的信息， 以使所述小基站根据所述 调度信息利用所述调度的第一频段上的无线资源向用户设备发送所述数据 包。
4、 根据权利要求 2所述的基站， 其特征在于，
所述接收单元， 还用于在所述发送单元向用户设备发送数据包之后， 接 收所述小基站发送的数据包信息， 所述数据包信息包括： 所述数据包的标识。
5、 根据权利要求 1-4任一所述的基站， 其特征在于， 所述基站还包括： 获取单元， 用于在所述接收单元接收所述用户设备发送的反馈信息之前， 根据数据包的标识获取緩存的所述数据包；
第二调度单元， 用于为所述数据包调度第二频段上的无线资源。
6、 根据权利要求 1-4任一所述的基站， 其特征在于， 所述基站还包括： 获取单元， 用于在所述接收单元接收所述用户设备发送的反馈信息之后， 根据数据包的标识获取緩存的所述数据包；
第二调度单元， 用于为所述数据包调度第二频段上的无线资源。
7、 根据权利要求 1-6任一所述的基站， 其特征在于， 所述第一频段高于 所述第二频段。
8、 一种用户设备， 其特征在于， 所述用户设备包括：
接收单元， 用于接收基站利用第一频段上的无线资源发送的数据包； 确定单元， 用于确定所述数据包是否发送成功；
发送单元， 用于向所述基站发送反馈信息， 所述反馈信息用于指示所述 数据包是否发送成功；
所述接收单元， 还用于若所述反馈信息指示所述数据包发送失败， 接收 所述基站利用第二频段上的无线资源发送的所述数据包。
9、 根据权利要求 8所述的用户设备， 其特征在于， 所述第一频段和第二 频段具有重叠的覆盖范围， 所述用户设备处于所述重叠的覆盖范围内。
1 0、 根据权利要求 8 所述的用户设备， 其特征在于， 所述发送单元具体 用于：
通过小基站向所述基站发送反馈信息。
1 1、 根据权利要求 8-10任一所述的用户设备， 其特征在于， 所述第一频 段高于所述第二频段。
12、 一种自适应重传方法， 其特征在于， 所述方法包括：
利用第一频段上的无线资源向用户设备发送数据包；
接收所述用户设备发送的反馈信息， 所述反馈信息用于指示所述数据包 是否发送成功；
若所述反馈信息指示所述数据包发送失败， 利用第二频段上的无线资源 向用户设备发送所述数据包； 所述第一频段和第二频段具有重叠的覆盖范围， 所述用户设备处于所述 重叠的覆盖范围内。
1 3、 根据权利要求 12所述的方法， 其特征在于， 所述利用第一频段上的 无线资源向用户设备发送数据包具体为：
向小基站发送所述数据包， 以使小基站利用第一频段上的无线资源向用 户设备发送所述数据包。
14、 根据权利要求 1 3所述的方法， 其特征在于， 在所述利用第一频段上 的无线资源向用户设备发送数据包之前， 所述方法还包括：
为所述数据包调度第一频段上的无线资源；
向小基站发送调用信息， 所述调用信息包括： 为所述数据包调度的第一 频段上的无线资源的信息， 以使所述小基站根据所述调度信息利用所述调度 的第一频段上的无线资源向用户设备发送所述数据包。
15、 根据权利要求 1 3所述的方法， 其特征在于， 在所述利用第一频段上 的无线资源向用户设备发送数据包之后， 所述方法还包括：
接收所述小基站发送的数据包信息， 所述数据包信息包括： 所述数据包 的标识。
16、 根据权利要求 12-15任一所述的方法， 其特征在于， 在所述接收所 述用户设备发送的反馈信息之前， 所述方法还包括：
根据数据包的标识获取緩存的所述数据包；
为所述数据包调度第二频段上的无线资源。
17、 根据权利要求 12-15任一所述的方法， 其特征在于， 在所述接收所 述用户设备发送的反馈信息之后， 所述方法还包括：
根据数据包的标识获取緩存的所述数据包；
为所述数据包调度第二频段上的无线资源。
18、 根据权利要求 12-17任一所述的方法， 其特征在于， 所述第一频段 高于所述第二频段。
PCT/CN2014/072261 2014-02-19 2014-02-19 基站、用户设备及自适应重传方法 Ceased WO2015123828A1 (zh)

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