WO2020147129A1 - 接入反馈方法、装置、基站、终端及存储介质 - Google Patents

接入反馈方法、装置、基站、终端及存储介质 Download PDF

Info

Publication number
WO2020147129A1
WO2020147129A1 PCT/CN2019/072429 CN2019072429W WO2020147129A1 WO 2020147129 A1 WO2020147129 A1 WO 2020147129A1 CN 2019072429 W CN2019072429 W CN 2019072429W WO 2020147129 A1 WO2020147129 A1 WO 2020147129A1
Authority
WO
WIPO (PCT)
Prior art keywords
random access
base station
time window
feedback
frequency band
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/CN2019/072429
Other languages
English (en)
French (fr)
Inventor
洪伟
朱亚军
沙桐
李勇
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.)
Beijing University of Posts and Telecommunications
Beijing Xiaomi Mobile Software Co Ltd
Original Assignee
Beijing University of Posts and Telecommunications
Beijing Xiaomi Mobile Software 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 Beijing University of Posts and Telecommunications, Beijing Xiaomi Mobile Software Co Ltd filed Critical Beijing University of Posts and Telecommunications
Priority to EP19910817.6A priority Critical patent/EP3914019B1/en
Priority to CN201980000082.0A priority patent/CN109863812B/zh
Priority to US17/422,431 priority patent/US12289765B2/en
Priority to PCT/CN2019/072429 priority patent/WO2020147129A1/zh
Publication of WO2020147129A1 publication Critical patent/WO2020147129A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • 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
    • H04L1/188—Time-out mechanisms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present disclosure relates to the field of communication technology, and specifically relates to an access feedback method, device, base station, terminal, and storage medium.
  • Uplink synchronization means that uplink signals sent by terminals in different locations in the same cell can reach the base station synchronously.
  • the terminal usually establishes uplink synchronization with the base station during random access, which can reduce the number of different terminals. Interference to improve system performance.
  • the terminal sends a random access preamble to the base station, and the base station receives the random access preamble, and sends random access feedback to the terminal within a preset time window.
  • the random access feedback is used to indicate that the base station receives the random access preamble. Access the preamble.
  • the terminal receives the random access feedback within the preset time window and determines that the random access preamble is successfully sent, it will establish uplink synchronization with the base station according to the random access feedback. If the terminal does not receive the random access feedback within the preset time window and determines that the random access preamble has failed to be sent, the random access preamble is retransmitted.
  • the traditional random access process is carried out through authorized frequency bands, and with the rapid growth of mobile data, the available authorized frequency bands gradually become saturated, and there is currently a problem of shortage of frequency bands.
  • 3GPP 3rd Generation Partnership Project
  • the base station needs to occupy the channel through the LBT (Listen Before Talk) mechanism before sending random access feedback through the occupied channel. If the base station fails to occupy the channel within the preset time window, it will not be able to send random access feedback. If the terminal cannot receive the random access feedback within the preset time window, it will mistakenly believe that the random access preamble has failed to be sent. The random access preamble will be re-sent, which increases unnecessary delay, wastes communication resources, and causes interference to other devices.
  • the present disclosure provides an access feedback method, device, base station, terminal, and storage medium, which can solve related technical problems.
  • the technical solution is as follows:
  • an access feedback method applied to a base station includes:
  • the first time window the first control channel in the unlicensed frequency band is occupied by the LBT mechanism without backoff, the first time window belongs to the time window during which the terminal occupies the unlicensed frequency band;
  • a first random access feedback is sent through the first control channel, where the first random access feedback is used to indicate that the base station receives the random access preamble.
  • the first random access feedback includes indication information of the random access preamble
  • the indication information is the random access preamble, or the indication information is the identifier of the random access preamble.
  • the method further includes:
  • the control signaling is sent through the second control channel, the control signaling carries resource indication information, and the resource indication information is used to indicate that the first control channel in the first time window is used to send the first control channel.
  • the sending the first random access feedback through the first control channel includes: sending the first random access feedback through the resource.
  • the method further includes:
  • the first random access feedback is scrambled by using a random access wireless network temporary identifier RA-RNTI, and the RA-RNTI is determined by a resource for transmitting the random access preamble.
  • RA-RNTI random access wireless network temporary identifier
  • the method further includes:
  • the second random access feedback is sent through the third control channel, and the second random access feedback includes indication information and control information of the random access preamble, and the control information includes uplink authorization, timing advance command, At least one of the temporary cell radio network identifiers C-RNTI.
  • the first random access feedback includes multiple indication information corresponding to random access preambles sent by multiple terminals, and the method further includes:
  • the bits after the plurality of indication information are filled with a preset value, so that the bit length of the first random access feedback after filling is equal to The preset length.
  • an access feedback method applied to a terminal includes:
  • the first time window receive the first random access feedback sent by the base station through the first control channel in the unlicensed frequency band, where the first random access feedback is used to indicate that the base station receives the Random access preamble, where the first time window belongs to a time window during which the terminal occupies the unlicensed frequency band;
  • the base station According to the first random access feedback, it is determined that the random access preamble is successfully received by the base station.
  • the method further includes:
  • the random access preamble is sent to the base station again through the physical random access channel. Enter the preamble.
  • the determining that the random access preamble is successfully received by the base station according to the first random access feedback includes:
  • the indication information in the first random access feedback is the same as the indication information of the random access preamble sent by the terminal, it is determined that the random access preamble is successfully received by the base station, and the indication information is The random access preamble, or the indication information is an identifier of the random access preamble.
  • the method further includes:
  • the receiving, within the first time window, the first random access feedback sent by the base station through the first control channel in the unlicensed frequency band includes: receiving the first random access feedback through the resource.
  • the first random access feedback is scrambled by using a random access wireless network temporary identifier RA-RNTI, and the RA-RNTI is determined by the resource for transmitting the random access preamble;
  • the method also includes:
  • the RA-RNTI is used to descramble the first random access feedback.
  • the method further includes:
  • a second random access feedback sent by the base station through a third control channel in the unlicensed frequency band is received, where the second random access feedback includes all Indication information and control information of the random access preamble, where the control information includes at least one of an uplink authorization, a timing advance command, and a temporary cell radio network identifier C-RNTI;
  • an access feedback device applied to a base station includes:
  • the receiving module is used to receive the random access preamble sent by the terminal through the unlicensed frequency band;
  • the first occupancy module is configured to occupy the first control channel in the unlicensed frequency band through the non-backoff listen-and-speak LBT mechanism within a first time window, and the first time window belongs to the terminal occupies the non-licensed frequency band.
  • the first sending module is configured to send a first random access feedback through the first control channel, where the first random access feedback is used to indicate that the base station receives the random access preamble.
  • the first random access feedback includes indication information of the random access preamble
  • the indication information is the random access preamble, or the indication information is the identifier of the random access preamble.
  • the device further includes:
  • the second occupancy module is configured to occupy the second control channel in the unlicensed frequency band through the non-backoff LBT mechanism within the first time window;
  • the second sending module is configured to send control signaling through the second control channel, where the control signaling carries resource indication information, and the resource indication information is used to indicate the first control channel in the first time window Resources used for sending the first random access feedback in;
  • the first sending module is further configured to send the first random access feedback through the resource.
  • the device further includes:
  • the scrambling module is configured to scramble the first random access feedback using a random access wireless network temporary identifier RA-RNTI, where the RA-RNTI is determined by the resource for sending the random access preamble.
  • the device further includes:
  • a third occupancy module configured to occupy the third control channel in the unlicensed frequency band by adopting a random backoff LBT mechanism with a non-fixed length window in a second time window after the first time window;
  • the third sending module is configured to send second random access feedback through the third control channel, where the second random access feedback includes indication information and control information of the random access preamble, and the control information includes At least one of uplink authorization, timing advance command, and temporary cell radio network identifier C-RNTI.
  • the first random access feedback includes multiple indication information corresponding to random access preambles sent by multiple terminals, and the apparatus further includes:
  • the filling module is configured to fill the bits after the multiple indication information with a preset value when the bit length of the multiple indication information is less than the preset length, so that the first random access feedback after filling The bit length of is equal to the preset length.
  • an access feedback device which is applied to a terminal, and the device includes:
  • Occupancy module used to occupy unlicensed frequency bands
  • a sending module configured to send a random access preamble to the base station through the unlicensed frequency band
  • the first receiving module is configured to receive, within a first time window, the first random access feedback sent by the base station through the first control channel in the unlicensed frequency band, where the first random access feedback is used to indicate When the base station receives the random access preamble, the first time window belongs to a time window in which the terminal occupies the unlicensed frequency band;
  • the first determining module is configured to determine, according to the first random access feedback, that the random access preamble is successfully received by the base station.
  • the first determining module is further configured to determine that the random access preamble transmission fails if the first random access feedback is not received within the first time window;
  • the sending module is further configured to send the random access preamble to the base station again through the physical random access channel.
  • the first determining module is further configured to determine when the indication information in the first random access feedback is the same as the indication information of the random access preamble sent by the terminal The random access preamble is successfully received by the base station, and the indication information is the random access preamble, or the indication information is the identifier of the random access preamble.
  • the device further includes:
  • a second receiving module configured to receive, within the first time window, control signaling sent by the base station through a second control channel in the unlicensed frequency band, where the control signaling carries resource indication information;
  • a second determining module configured to determine, according to the resource indication information, a resource used to send the first random access feedback in the first control channel in the first time window;
  • the first receiving module is further configured to receive the first random access feedback through the resource.
  • the first random access feedback is scrambled by using a random access wireless network temporary identifier RA-RNTI, and the RA-RNTI is determined by the resource for transmitting the random access preamble;
  • the device also includes:
  • the descrambling module is configured to use the RA-RNTI to descramble the first random access feedback.
  • the device further includes:
  • the third receiving module is configured to receive, in a second time window after the first time window, the second random access feedback sent by the base station through the third control channel in the unlicensed frequency band, the first 2.
  • the random access feedback includes indication information and control information of the random access preamble, and the control information includes at least one of an uplink grant, a timing advance command, and a temporary cell radio network identifier C-RNTI;
  • the establishment module is configured to establish uplink synchronization with the base station according to the second random access feedback.
  • a base station including:
  • Memory for storing processor executable instructions
  • the processor is configured to:
  • the first time window the first control channel in the unlicensed frequency band is occupied by the LBT mechanism without backoff, the first time window belongs to the time window during which the terminal occupies the unlicensed frequency band;
  • a first random access feedback is sent through the first control channel, where the first random access feedback is used to indicate that the base station receives the random access preamble.
  • a terminal including:
  • the terminal includes:
  • Memory for storing processor executable instructions
  • the processor is configured to:
  • the first time window receive the first random access feedback sent by the base station through the first control channel in the unlicensed frequency band, where the first random access feedback is used to indicate that the base station receives the Random access preamble, where the first time window belongs to a time window during which the terminal occupies the unlicensed frequency band;
  • the base station According to the first random access feedback, it is determined that the random access preamble is successfully received by the base station.
  • a computer-readable storage medium having at least one instruction stored in the computer-readable storage medium, and the instruction is loaded and executed by a processor to implement the The operations performed in the access feedback method described above.
  • a computer-readable storage medium having at least one instruction stored in the computer-readable storage medium, and the instruction is loaded and executed by a processor to realize the The operations performed in the access feedback method described above.
  • the base station receives the random access preamble sent by the terminal through the unlicensed frequency band, and in the first time window, the LBT mechanism occupies the non-backup
  • the first control channel in the authorized frequency band sends the first random access feedback through the first control channel.
  • the first time window belongs to the time window during which the terminal occupies the unlicensed frequency band.
  • the first random access feedback is used to indicate that the base station receives random access
  • the terminal receives the first random access feedback sent by the base station through the first control channel within the first time window, and determines that the random access preamble is successfully received by the base station. There is no need to resend the random access preamble, which reduces Unnecessary delay avoids the waste of communication resources and also avoids interference to other devices.
  • Fig. 1 is a schematic diagram showing a channel access failure of a base station according to an exemplary embodiment
  • Fig. 2 is a schematic structural diagram showing a communication system according to an exemplary embodiment
  • Fig. 3 is a flow chart showing an access feedback method according to an exemplary embodiment
  • Fig. 4 is a flowchart showing an access feedback method according to an exemplary embodiment
  • Fig. 5 is a flow chart showing an access feedback method according to an exemplary embodiment
  • Fig. 6 is a structural diagram showing a first random access feedback according to an exemplary embodiment
  • Fig. 7 is a structural diagram showing a second random access feedback according to an exemplary embodiment
  • Fig. 8 is a diagram showing the structure of a MAC layer message according to an exemplary embodiment
  • Fig. 9 is a structural diagram showing a MAC PDU header according to an exemplary embodiment
  • Fig. 10 is a flowchart showing a method for access feedback according to an exemplary embodiment
  • Fig. 11 is a schematic diagram showing a sequence of another access feedback method according to an exemplary embodiment
  • Fig. 12 is a block diagram showing an access feedback device according to an exemplary embodiment
  • Fig. 13 is a block diagram showing an access feedback device according to an exemplary embodiment
  • Fig. 14 is a block diagram showing a base station according to an exemplary embodiment
  • Fig. 15 is a block diagram showing a terminal according to an exemplary embodiment.
  • the embodiments of the present disclosure provide an access feedback method, device, base station, terminal, and storage medium.
  • the present disclosure will be described in detail below with reference to the accompanying drawings.
  • Fig. 2 is a schematic structural diagram of a communication system according to an exemplary embodiment. As shown in Fig. 2, the communication system includes a terminal 201 and a base station 202, and the terminal 201 and the base station 202 are connected through a communication network.
  • the terminal 201 may occupy an unlicensed frequency band and communicate with the base station 202 through the unlicensed frequency band.
  • the terminal 201 sends a random access preamble to the base station 202, and the base station 202 receives the random access preamble sent by the terminal 201, and sends the first random access feedback to the terminal within the first time window.
  • the second random access feedback is sent to the terminal in the second time window, the first time window belongs to the time window in which the terminal occupies the unlicensed frequency band, and the second time window is located after the first time window.
  • Fig. 3 is a flowchart showing an access feedback method according to an exemplary embodiment, which is applied to the base station shown in Fig. 2, as shown in Fig. 3, including the following steps:
  • step 301 the random access preamble sent by the terminal through the unlicensed frequency band is received.
  • step 302 within the first time window, the first control channel in the unlicensed frequency band is occupied by the LBT mechanism without backoff.
  • the first time window belongs to the time window during which the terminal occupies the unlicensed frequency band.
  • step 303 the first random access feedback is sent through the first control channel.
  • the first random access feedback is used to indicate that the base station receives the random access preamble.
  • the base station receives the random access preamble sent by the terminal through the unlicensed frequency band, and within the first time window, the first control channel in the unlicensed frequency band is occupied by the LBT mechanism without back-off.
  • the first random access feedback is sent through the first control channel.
  • the first time window belongs to the time window in which the terminal occupies the unlicensed frequency band.
  • the first random access feedback is used to indicate that the base station receives the random access preamble and the terminal is in the first time Receive the first random access feedback sent by the base station through the first control channel in the window, and determine that the random access preamble is successfully received by the base station. There is no need to resend the random access preamble, which reduces unnecessary delay and avoids communication The waste of resources also avoids interference to other devices.
  • the first random access feedback includes indication information of a random access preamble
  • the indication information is a random access preamble, or the indication information is an identifier of the random access preamble.
  • the method further includes:
  • the second control channel in the unlicensed frequency band is occupied by the non-backoff LBT mechanism
  • the control signaling carries resource indication information, and the resource indication information is used to indicate the resource used to send the first random access feedback in the first control channel in the first time window;
  • Sending the first random access feedback through the first control channel includes: sending the first random access feedback through a resource.
  • the method further includes:
  • the random access wireless network temporary identifier RA-RNTI is used to scramble the first random access feedback, and the RA-RNTI is determined by the resource for sending the random access preamble.
  • the method further includes:
  • the third control channel in the unlicensed frequency band is occupied by using a random backoff LBT mechanism with a non-fixed length window;
  • the second random access feedback is sent through the third control channel.
  • the second random access feedback includes random access preamble indication information and control information.
  • the control information includes uplink authorization, timing advance command, and temporary cell radio network identifier C-RNTI At least one of.
  • the first random access feedback includes multiple indication information corresponding to random access preambles sent by multiple terminals, and the method further includes:
  • the bits after the multiple indication information are filled with a preset value, so that the bit length of the first random access feedback after filling is equal to the preset length.
  • Fig. 4 is a flowchart showing an access feedback method according to an exemplary embodiment, which is applied to the terminal shown in Fig. 2, as shown in Fig. 4, including the following steps:
  • step 401 the unlicensed frequency band is occupied, and the random access preamble is sent to the base station through the unlicensed frequency band.
  • step 402 within the first time window, receive the first random access feedback sent by the base station through the first control channel in the unlicensed frequency band.
  • the first random access feedback is used to indicate that the base station receives the random access preamble, and the first time window belongs to the time window in which the terminal occupies the unlicensed frequency band.
  • step 403 according to the first random access feedback, it is determined that the random access preamble is successfully received by the base station.
  • the terminal occupies the unlicensed frequency band, sends a random access preamble to the base station through the physical random access channel on the unlicensed frequency band, and in the first time window, the receiving base station passes the unlicensed frequency band According to the first random access feedback sent by the first control channel, it is determined that the random access preamble is successfully sent according to the first random access feedback.
  • the first random access feedback is used to indicate that the base station receives the random access preamble, and the first time window belongs to the time window in which the terminal occupies the unlicensed frequency band.
  • the terminal can determine that the random access preamble is successfully received by the base station, and there is no need to retransmit the random access preamble, reducing unnecessary delay and avoiding communication resources The waste, also avoids interference with other equipment.
  • the method further includes:
  • the random access preamble is sent to the base station through the physical random access channel again.
  • determining that the random access preamble is successfully received by the base station according to the first random access feedback includes:
  • the indication information in the first random access feedback is the same as the indication information of the random access preamble sent by the terminal, it is determined that the random access preamble is successfully received by the base station, and the indication information is a random access preamble, or indication information It is the identification of the random access preamble.
  • the method further includes:
  • the resource indication information determine the resource used for sending the first random access feedback in the first control channel in the first time window
  • receiving the first random access feedback sent by the base station through the first control channel in the unlicensed frequency band includes: receiving the first random access feedback through a resource.
  • the first random access feedback is scrambled by using the random access wireless network temporary identifier RA-RNTI, and the RA-RNTI is determined by the resource for sending the random access preamble; the method further includes:
  • the RA-RNTI is used to descramble the first random access feedback.
  • the method further includes:
  • the second random access feedback sent by the base station through the third control channel in the unlicensed frequency band is received.
  • the second random access feedback includes the indication information of the random access preamble and Control information, the control information includes at least one of uplink authorization, timing advance command, and temporary cell radio network identifier C-RNTI;
  • uplink synchronization is established with the base station.
  • Fig. 5 is a flow chart of an access feedback method proposed according to an exemplary embodiment.
  • the interaction subjects are the base station and the terminal, as shown in Fig. 5, including the following steps:
  • step 501 the terminal occupies an unlicensed frequency band, and sends a random access preamble to the base station through the unlicensed frequency band.
  • step 502 the base station receives the random access preamble sent by the terminal.
  • the base station can be configured with an authorized frequency band, and the base station and the terminal communicate through the authorized frequency band.
  • the base station can also be configured with an unlicensed frequency band at present, and the base station and the terminal can communicate through the unlicensed frequency band.
  • the unlicensed frequency band is different from the licensed frequency band.
  • the unlicensed frequency band is a public frequency band
  • LBT Listen Before Talk
  • the occupation of the unlicensed frequency band through the LBT mechanism refers to detecting the state of the unlicensed frequency band.
  • the unlicensed frequency band is in an idle state, the unlicensed frequency band is successfully occupied, so that communication can be carried out through the unlicensed frequency band.
  • it is busy, it fails to occupy the unlicensed frequency band.
  • CAT 1 LBT Category 1 LBT, the first type of LBT
  • CAT 2 LBT Category 2 LBT, the second type of LBT
  • CAT 3 LBT Category 3 LBT, the third type of LBT
  • the random backoff LBT mechanism with non-fixed length windows is called CAT 4 LBT (Category 4 LBT, Type 4 LBT).
  • the embodiments of the present disclosure are applied to the random access process of the terminal.
  • the terminal needs to establish an uplink connection with the base station, it obtains the random access preamble and occupies the unlicensed frequency band through the LBT mechanism.
  • the terminal can pass the unlicensed frequency band Send the random access preamble to the base station.
  • the base station receives the random access preamble through the unlicensed frequency band, thereby knowing that the terminal needs to establish uplink synchronization with the base station.
  • the terminal can occupy an unlicensed frequency band through any one of the above four LBT mechanisms, such as the CAT 2 LBT mechanism or the CAT 4 LBT mechanism, which is not limited in the embodiment of the present disclosure.
  • the random access preamble may be randomly selected by the terminal from a plurality of random access preambles configured by the base station, or configured by the base station for the terminal, or may also be determined in other ways.
  • the random access preamble can be used as an indication for the terminal to establish uplink synchronization with the base station, and the subsequent base station realizes synchronization according to the random access preamble of the terminal.
  • the random access preambles of different terminals are different, so that conflicts between different terminals can be avoided.
  • the terminal when the terminal successfully occupies the unlicensed frequency band, it sends a random access preamble to the base station through the physical random access channel in the unlicensed frequency band, and the base station receives the random access preamble through the physical random access channel , Thereby knowing that the terminal needs to establish uplink synchronization with the base station.
  • the physical random access channel is the channel for the terminal to send the random access preamble to the base station, which can be PRACH (Physical Random Access Channel) or other channels for sending the random access preamble. .
  • the base station Before the terminal sends the random access preamble, the base station can indicate the physical random access channel in the unlicensed frequency band of the terminal in the form of broadcast, or the base station can pre-configure the physical random access channel in the unlicensed frequency band for the terminal, or it can also Use other methods to determine the physical random access channel in the unlicensed frequency band.
  • the base station occupies the second control channel in the unlicensed frequency band through the non-backoff LBT mechanism within the first time window, and sends control signaling through the second control channel.
  • the terminal sends a random access preamble, and after receiving the random access preamble, the base station should send a random access feedback to the terminal within a preset time window, indicating that the terminal base station has received the random access preamble. If the terminal does not receive the random access feedback within the preset time window, it will determine that the random access preamble has failed, and then resend the random access preamble.
  • the base station fails to occupy the channel within the preset time window, it will not be able to send random access feedback, and the terminal will not be able to receive random access feedback within the preset time window and will mistake it for random access If the transmission of the access preamble fails, the terminal will increase the power and resend the random access preamble.
  • embodiments of the present disclosure provide a way for a base station to send random access feedback in advance. After the terminal successfully occupies the unlicensed frequency band, it can continue to occupy the unlicensed frequency band for a period of time, and this period of time is the time window for the terminal to occupy the unlicensed frequency band. After the terminal sends the random access preamble, the unlicensed frequency band will be in an idle state. Then, in this time window, the base station can quickly occupy the unlicensed frequency band through the non-backoff LBT mechanism, so that the random access feedback can be quickly sent through the unlicensed frequency band.
  • the base station in order to send the random access feedback in advance, after the base station receives the random access preamble, it can send control signaling by occupying the unlicensed frequency band within the first time window to instruct the base station to send the first random access feedback resource , And then send the first random access feedback through the resource, where the first random access feedback is used to indicate that the base station has successfully received the random access preamble.
  • the base station first occupies the second control channel in the unlicensed frequency band through the non-backoff LBT mechanism in the first time window, and the first time window belongs to the time window of the terminal unlicensed frequency band.
  • the base station sends control signaling through the second control channel.
  • the first time window may be pre-configured by the base station, and the second control channel may be PDCCH (Physical Downlink Control Channel, physical downlink control channel) or other channels.
  • the control signaling includes resource indication information, and the resource indication information is used to indicate the resource used to send the first random access feedback in the first control channel in the first time window, and may be a time domain resource and/or a frequency domain resource, Or it can be other resources.
  • the control signaling may be DCI (Downlink Control Information, downlink control information) or other types of signaling.
  • step 504 the terminal receives the control signaling sent by the base station, and according to the resource indication information, determines the resource for sending the first random access feedback in the first control channel in the first time window.
  • the base station sends control signaling through the second control channel, and the terminal can receive the control signaling through the second control channel. According to the resource indication information in the control signaling, it is determined to be used in the first control channel in the first time window. Send the first random access feedback resource. Subsequent terminals can receive the first random access feedback sent by the base station through the resource.
  • steps 503-504 are optional. In another embodiment, steps 503-504 may not be performed. Instead, other methods are used to inform the terminal of the resources used to send the first random access feedback. After receiving the random access preamble sent by the terminal, the base station directly executes the following steps 505-507 to send random access feedback without sending control signaling.
  • the base station occupies the first control channel in the unlicensed frequency band through the non-backoff LBT mechanism, and sends the first random access feedback through the resources in the first control channel.
  • step 506 the terminal receives the first random access feedback sent by the base station through the resource.
  • the base station After sending the control signaling through the second control channel, the base station occupies the first control channel in the unlicensed frequency band through the non-backoff LBT mechanism, and sends the first random access feedback through the resources indicated in the control signaling.
  • the first random access feedback is used to indicate that the base station receives the random access preamble.
  • the base station can quickly occupy the first control channel through the non-backoff LBT mechanism, so that the first random access feedback can be sent within the first time window.
  • the terminal receives the first random access feedback through the resource, and can receive the first random access feedback within the first time window.
  • the first control channel may be PDSCH (Physical Downlink Shared Channel, physical downlink shared channel) or other channels.
  • PDSCH Physical Downlink Shared Channel, physical downlink shared channel
  • the first random access feedback includes indication information of the random access preamble, and the indication information may be the random preamble itself, or the indication information is the identification of the random access preamble, where:
  • the identifier uniquely corresponds to the random access preamble, which can be RAPID (Random Access Preamble Index, random access preamble sequence number) or the index of the random access preamble, or it can be other uniquely corresponding to the random access preamble Logo.
  • the identifier can contain any number of bits, such as 6 bits.
  • the base station uses RA-RNTI (Random Access Radio Network Temporary Identifier) to scramble the first random access feedback, where the RA-RNTI is sent by random The resource of the access preamble is determined. Only the terminal whose RA-RNTI corresponding to the resource sending the random access preamble is the same as the RA-RNTI used during scrambling can descramble the first random access feedback through the correct RA-RNTI, thereby receiving the first random access feedback. A random access feedback, read the information carried in the first random access feedback.
  • RA-RNTI Random Access Radio Network Temporary Identifier
  • multiple terminals since multiple terminals are independent of each other, they may jointly compete for an unlicensed frequency band.
  • the random access preamble may be sent through the same resource in the unlicensed frequency band, causing the base station to receive the random access preamble of the multiple terminals at the same time.
  • the base station sends the first random access feedback according to the received multiple random access preambles, and the first random access feedback carries multiple random access preambles corresponding to the multiple random access preambles.
  • the base station may set a preset length, generate a first random access feedback with a bit length equal to the preset length, and fill multiple indication information into the first random access feedback.
  • the bit length of the multiple indication information is less than the preset length, the bits after the multiple indication information are filled with a preset value, so that the bit length of the first random access feedback after filling is equal to the preset length.
  • the preset length can be any positive integer
  • the preset value can be 0, 1, or other values.
  • the base station may also set a preset number, and the number of indication information in the first random access feedback sent does not exceed the preset number, that is, random access feedback is performed to a preset number of terminals at most each time.
  • step 507 the terminal determines that the random access preamble is successfully received by the base station according to the first random access feedback.
  • the terminal After receiving the first random access feedback within the first time window, the terminal can determine that the random access preamble is successfully received by the base station, thereby determining that there is no need to retransmit the random access preamble. In the subsequent process, the terminal may wait to receive the second random access feedback in a second time window after the first time window, so as to perform uplink synchronization according to the second random access feedback.
  • the indication information in the first random access feedback is the same as the indication information of the random access preamble sent by the terminal, it is determined that the random access preamble is successfully received by the base station.
  • the indication information in the first random access feedback is different from the indication information of the random access preamble sent by the terminal, it is determined that the transmission of the random access preamble has failed, and the random access preamble is retransmitted at this time.
  • the indication information may be the random access preamble itself, or the identification of the random access preamble.
  • the first random access feedback includes multiple indication information
  • the embodiment of the present disclosure is only described by taking the terminal receiving the first random access feedback within the first time window as an example.
  • the base station does not receive the random access preamble sent by the terminal, then The first random access feedback cannot be sent within the first time window. If the terminal does not receive the first random access feedback within the first time window, it is determined that the random access preamble has failed to be sent, and the random access preamble needs to be retransmitted.
  • the terminal re-occupies the unlicensed frequency band and sends the random access preamble to the base station through the physical random access channel in the unlicensed frequency band, instead of waiting for the random access feedback to be sent again when the random access feedback is not received within the second time window.
  • Access preamble so that in the case of failure to send the random access preamble, it can be re-sent in advance, which shortens the time delay and improves the efficiency of the random access process.
  • step 508 in a second time window after the first time window, the base station uses a random backoff LBT mechanism with a non-fixed length window to occupy the third control channel in the unlicensed frequency band, and send the second random control channel through the third control channel. Access feedback.
  • step 509 the terminal receives the second random access feedback through the third control channel within the second time window, and establishes uplink synchronization with the base station according to the second random access feedback.
  • the second time window is located after the first time window, the second time window is adjacent to the first time window, or there is a certain time interval between the first time window.
  • the second time window may be pre-configured by the base station.
  • the base station Since the base station receives the random access preamble to the base station prepares to send the random access feedback, a certain time interval is required. Therefore, the second time window for the base station to send the second random access feedback may no longer belong to the time window during which the terminal occupies the unlicensed frequency band. If the base station wants to send the second random access feedback within the second time window, the second time window needs to be adopted again.
  • the random backoff LBT mechanism with a fixed length window occupies the third control channel in the unlicensed frequency band.
  • the third control channel may be a PDSCH or other channels, and the third control channel and the first control channel may be the same channel or different channels.
  • the second random access feedback includes random access preamble indication information and control information.
  • the control information includes uplink authorization, timing advance command, and temporary C-RNTI (Cell Radio Network Temporary Identifier). At least one item.
  • the uplink authorization is used to indicate the authorization to allow the terminal to send data to the base station
  • the timing advance command is used to instruct the terminal to send data to the base station in advance.
  • the temporary C-RNTI is a dynamic identifier assigned to the terminal by the base station, which uniquely identifies the terminal under the air interface of a cell, and only the C-RNTI of the terminal in the connected state is valid.
  • the second random access feedback may be as shown in FIG. 7.
  • the second random access feedback may also include indication information and control information of multiple terminals.
  • the indication information and control information of the same terminal establish a corresponding relationship, and each terminal can be based on the random access of the local terminal.
  • the indication information of the preamble acquires corresponding control information, and establishes uplink synchronization with the base station according to the acquired control information.
  • the second random access feedback is sent by a MAC (Media Access Control Protocol Data Unit, Media Access Control) layer message.
  • the indication information and control information of multiple terminals are multiplexed in one MAC layer message.
  • a MAC PDU Media Access Control Protocol Data Unit, Media Access Control Protocol Data Unit
  • the RAPID in the MAC PDU header is used to distinguish different terminals
  • the MAC RAR Random Access Response
  • the difference between the second random access feedback and the first random access feedback is shown in Table 1 below. See Table 1.
  • the first random access feedback contains less information, and it takes less time to send the first random access feedback. Fast transmission can be realized, thereby quickly notifying the terminal that the base station has received the random access preamble.
  • the second random access feedback contains more information, and it takes more time to send the second random access feedback, and the terminal can establish uplink synchronization with the base station according to the second random access feedback.
  • the terminal occupies the unlicensed frequency band, and after sending the random access preamble to the base station, within the time window when the terminal occupies the unlicensed frequency band, through the non-backoff LBT access channel,
  • the first random access feedback is fed back quickly. This feedback is only used to confirm that the random access preamble is successfully received by the base station.
  • the base station After sending the first random access feedback, the base station then uses the random backoff LBT mechanism with a non-fixed length window to access the channel, and sends the traditional second random access feedback.
  • the base station can also occupy the control channel by using the random backoff LBT mechanism of non-fixed length window, and send control signaling to the terminal through the control channel, and the control signaling includes the third
  • the control channel is used to send the resource indication information of the second random access feedback, and the terminal can determine the corresponding resource after receiving the control signaling.
  • the base station sends the second random access feedback through the resource in the third control channel, and the terminal receives the second random access feedback through the resource.
  • the terminal occupies an unlicensed frequency band, sends a random access preamble to the base station through a physical random access channel on the unlicensed frequency band, and the base station receives the random access preamble on the physical random access channel
  • the first control channel and the second control channel in the unlicensed frequency band are occupied by the non-backoff LBT mechanism, and the first random access feedback instruction is sent through the second control channel.
  • the control signaling of the resources of the first control channel is then sent through the resources of the first control channel to send the first random access feedback, and the terminal receives the first random access feedback on the resources of the first control channel within the first time window according to the control signaling.
  • Random access feedback determines that the random access preamble is successfully received by the base station, and there is no need to retransmit the random access preamble, which reduces unnecessary delay, avoids waste of communication resources, and avoids interference to other devices.
  • the embodiments of the present disclosure provide a random access feedback method applied to unlicensed frequency bands, which effectively avoids the situation that the terminal redundantly sends random access preambles due to the influence of LBT in the unlicensed frequency band. It seems that the random access delay is reduced.
  • Fig. 12 is a block diagram showing an access feedback device according to an exemplary embodiment.
  • the device is applied in a base station, and the device includes: a receiving module 1201, a first occupancy module 1202, and a first sending module 1203.
  • the receiving module 1201 is configured to receive the random access preamble sent by the terminal through the unlicensed frequency band;
  • the first occupancy module 1202 is configured to occupy the first control channel in the unlicensed frequency band through the listen-before-speak LBT mechanism without back-off within the first time window, and the first time window belongs to the time window during which the terminal occupies the unlicensed frequency band;
  • the first sending module 1203 is configured to send the first random access feedback through the first control channel, and the first random access feedback is used to indicate that the base station receives the random access preamble.
  • the random access preamble sent by the terminal through the unlicensed frequency band is received, and within the first time window, the first control channel in the unlicensed frequency band is occupied by the LBT mechanism without backoff.
  • the first control channel sends the first random access feedback.
  • the first time window belongs to the time window during which the terminal occupies the unlicensed frequency band.
  • the first random access feedback is used to indicate that the base station receives the random access preamble and the terminal is in the first time window.
  • the internal receiving the first random access feedback sent by the base station through the first control channel determines that the random access preamble is successfully received by the base station, and there is no need to retransmit the random access preamble, which reduces unnecessary delay and avoids communication resources The waste, also avoids interference with other equipment.
  • the first random access feedback includes indication information of a random access preamble
  • the indication information is a random access preamble, or the indication information is an identifier of the random access preamble.
  • the device further includes:
  • the second occupancy module is configured to occupy the second control channel in the unlicensed frequency band through the non-backoff LBT mechanism within the first time window;
  • the second sending module is configured to send control signaling through the second control channel, the control signaling carries resource indication information, and the resource indication information is used to indicate that the first control channel in the first time window is used to send the first random access feedback Resources;
  • the first sending module 1203 is further configured to send the first random access feedback through resources.
  • the device further includes:
  • the scrambling module is used to scramble the first random access feedback by using the random access wireless network temporary identifier RA-RNTI, and the RA-RNTI is determined by the resource for sending the random access preamble.
  • the device further includes:
  • the third occupancy module is used for occupying the third control channel in the unlicensed frequency band by adopting the random backoff LBT mechanism of non-fixed length window in the second time window after the first time window;
  • the third sending module is used to send the second random access feedback through the third control channel.
  • the second random access feedback includes random access preamble indication information and control information.
  • the control information includes uplink authorization, timing advance command, and temporary At least one of the cell radio network identifiers C-RNTI.
  • the first random access feedback includes multiple indication information corresponding to random access preambles sent by multiple terminals, and the apparatus further includes:
  • the filling module is used to fill the bits after the multiple indication information with a preset value when the bit length of the multiple indication information is less than the preset length, so that the bit length of the first random access feedback after filling is equal to the preset value. Set the length.
  • the access feedback device provided in the above embodiment provides access feedback
  • only the division of the above functional modules is used as an example for illustration.
  • the above functions can be allocated by different functional modules according to needs.
  • the internal structure of the base station is divided into different functional modules to complete all or part of the functions described above.
  • the access feedback device provided in the foregoing embodiment and the access feedback method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.
  • Fig. 13 is a block diagram showing an access feedback device according to an exemplary embodiment.
  • the device is applied to a terminal, and the device includes: an occupation module 1301, a sending module 1302, a first receiving module 1303, and a first determining module 1304.
  • the sending module 1302 is used to send the random access preamble to the base station through the unlicensed frequency band;
  • the first receiving module 1303 is configured to receive, within a first time window, the first random access feedback sent by the base station through the first control channel in the unlicensed frequency band.
  • the first random access feedback is used to indicate that the base station has received random access.
  • the first time window belongs to the time window in which the terminal occupies the unlicensed frequency band;
  • the first determining module 1304 is configured to determine that the random access preamble is successfully received by the base station according to the first random access feedback.
  • the device provided by the embodiment of the present disclosure occupies an unlicensed frequency band, sends a random access preamble to the base station through the physical random access channel on the unlicensed frequency band, and in the first time window, the receiving base station passes the first time in the unlicensed frequency band.
  • the first random access feedback sent by a control channel it is determined that the random access preamble is sent successfully.
  • the first random access feedback is used to indicate that the base station receives the random access preamble, and the first time window belongs to the time window in which the terminal occupies the unlicensed frequency band.
  • the base station By receiving the first random access feedback within the first time window, it can be determined that the random access preamble is successfully received by the base station, and there is no need to retransmit the random access preamble, which reduces unnecessary delay and avoids communication resources. Waste, and avoid interference to other equipment.
  • the first determining module 1304 is further configured to determine that the random access preamble transmission fails if the first random access feedback is not received within the first time window;
  • the sending module 1302 is also used to re-send the random access preamble to the base station through the physical random access channel.
  • the first determining module 1304 is further configured to determine the random access preamble when the indication information in the first random access feedback is the same as the indication information of the random access preamble sent by the terminal When received by the base station successfully, the indication information is the random access preamble, or the indication information is the identifier of the random access preamble.
  • the device further includes:
  • the second receiving module is configured to receive control signaling sent by the base station through the second control channel in the unlicensed frequency band within the first time window, where the control signaling carries resource indication information;
  • the second determining module is configured to determine, according to the resource indication information, the resource used to send the first random access feedback in the first control channel in the first time window;
  • the first receiving module 1303 is further configured to receive the first random access feedback through resources.
  • the first random access feedback is scrambled by using the random access wireless network temporary identifier RA-RNTI, and the RA-RNTI is determined by the resource for sending the random access preamble; the device further includes:
  • the descrambling module is used to descramble the first random access feedback by using RA-RNTI.
  • the device further includes:
  • the third receiving module is configured to receive, in a second time window after the first time window, the second random access feedback sent by the base station through the third control channel in the unlicensed frequency band, the second random access feedback includes random access Indication information and control information of the incoming preamble, the control information includes at least one of uplink authorization, timing advance command, and temporary cell radio network identifier C-RNTI;
  • the establishment module is used to establish uplink synchronization with the base station according to the second random access feedback.
  • the access feedback device provided in the above embodiment provides access feedback
  • only the division of the above functional modules is used as an example for illustration.
  • the above functions can be allocated by different functional modules according to needs. , That is, divide the internal structure of the terminal into different functional modules to complete all or part of the functions described above.
  • the access feedback device provided in the foregoing embodiment and the access feedback method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.
  • Fig. 14 is a block diagram showing a base station according to an exemplary embodiment.
  • the base station includes a processor 1401, a memory 1402 for storing processor executable instructions, and a transceiver 1403.
  • the processor 1401 is configured to execute the following instructions:
  • the first control channel in the unlicensed frequency band is occupied by the LBT mechanism through the non-backoff listen first, and the first time window belongs to the time window of the terminal occupies the unlicensed frequency band;
  • the first random access feedback is sent through the first control channel, and the first random access feedback is used to indicate that the base station receives the random access preamble.
  • a computer-readable storage medium is also provided.
  • the base station can execute the access feedback method in the foregoing embodiment.
  • Fig. 15 is a block diagram showing a terminal according to an exemplary embodiment.
  • the terminal 1500 may be a mobile phone, a computer, a digital broadcasting device, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.
  • the terminal 1500 may include one or more of the following components: a processing component 1502, a memory 1504, a power supply component 1506, a multimedia component 1508, an audio component 1510, an input/output (I/O) interface 1512, a sensor component 1514, And communication component 1516.
  • a processing component 1502 a memory 1504
  • a power supply component 1506 a multimedia component 1508, an audio component 1510, an input/output (I/O) interface 1512, a sensor component 1514, And communication component 1516.
  • I/O input/output
  • the processing component 1502 generally controls overall operations of the terminal 1500, such as operations associated with display, telephone calls, data communication, camera operations, and recording operations.
  • the processing component 1502 may include one or more processors 1520 to execute instructions to complete all or part of the steps of the foregoing method.
  • the processing component 1502 may include one or more modules to facilitate the interaction between the processing component 1502 and other components.
  • the processing component 1502 may include a multimedia module to facilitate the interaction between the multimedia component 1508 and the processing component 1502.
  • the memory 1504 is configured to store various types of data to support operations at the terminal 1500. Examples of these data include instructions for any application or method operated on the terminal 1500, contact data, phone book data, messages, pictures, videos, etc.
  • the memory 1504 can be implemented by any type of volatile or non-volatile storage devices or their combination, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable and Programmable Read Only Memory (EPROM), Programmable Read Only Memory (PROM), Read Only Memory (ROM), Magnetic Memory, Flash Memory, Magnetic Disk or Optical Disk.
  • SRAM static random access memory
  • EEPROM electrically erasable programmable read-only memory
  • EPROM erasable and Programmable Read Only Memory
  • PROM Programmable Read Only Memory
  • ROM Read Only Memory
  • Magnetic Memory Flash Memory
  • Magnetic Disk Magnetic Disk or Optical Disk.
  • the power supply component 1506 provides power for various components of the terminal 1500.
  • the power supply component 1506 may include a power management system, one or more power supplies, and other components associated with the generation, management, and distribution of power for the terminal 1500.
  • the multimedia component 1508 includes a screen that provides an output interface between the terminal 1500 and the user.
  • the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user.
  • the touch panel includes one or more touch sensors to sense touch, sliding, and gestures on the touch panel. The touch sensor may not only sense the boundary of the touch or sliding action, but also detect the duration and pressure related to the touch or sliding operation.
  • the multimedia component 1508 includes a front camera and/or a rear camera. When the terminal 1500 is in an operation mode, such as a shooting mode or a video mode, the front camera and/or the rear camera can receive external multimedia data. Each front camera and rear camera can be a fixed optical lens system or have focal length and optical zoom capabilities.
  • the audio component 1510 is configured to output and/or input audio signals.
  • the audio component 1510 includes a microphone (MIC).
  • the microphone is configured to receive external audio signals.
  • the received audio signal may be further stored in the memory 1504 or transmitted via the communication component 1516.
  • the audio component 1510 further includes a speaker for outputting audio signals.
  • the I/O interface 1512 provides an interface between the processing component 1502 and a peripheral interface module.
  • the peripheral interface module may be a keyboard, a click wheel, a button, and the like. These buttons may include, but are not limited to: home button, volume button, start button, and lock button.
  • the sensor component 1514 includes one or more sensors for providing the terminal 1500 with various status assessments.
  • the sensor component 1514 can detect the open/close state of the terminal 1500 and the relative positioning of components, such as the display and keypad of the terminal 1500, and the sensor component 1514 can also detect the position change of the terminal 1500 or a component of the terminal 1500 , The presence or absence of contact between the user and the terminal 1500, the orientation or acceleration/deceleration of the terminal 1500, and the temperature change of the terminal 1500.
  • the sensor assembly 1514 may include a proximity sensor configured to detect the presence of nearby objects when there is no physical contact.
  • the sensor component 1514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications.
  • the sensor component 1514 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor or a temperature sensor.
  • the communication component 1516 is configured to facilitate wired or wireless communication between the terminal 1500 and other devices.
  • the terminal 1500 can access a wireless network based on a communication standard, such as Wi-Fi, 2G or 3G, or a combination thereof.
  • the communication component 1516 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel.
  • the communication component 1516 further includes a near field communication (NFC) module to facilitate short-range communication.
  • NFC near field communication
  • the terminal 1500 may be configured by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable A gate array (FPGA), controller, microcontroller, microprocessor, or other electronic component is used to implement the above-mentioned access feedback method.
  • ASIC application specific integrated circuits
  • DSP digital signal processors
  • DSPD digital signal processing devices
  • PLD programmable logic devices
  • FPGA field programmable A gate array
  • controller microcontroller, microprocessor, or other electronic component is used to implement the above-mentioned access feedback method.
  • non-transitory computer-readable storage medium including instructions, such as a memory 1504 including instructions, which may be executed by the processor 1520 of the terminal 1500 to complete the foregoing method.
  • the non-transitory computer-readable storage medium may be ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
  • a computer-readable storage medium is also provided.
  • the terminal can execute the method in the foregoing embodiment, and the method includes:
  • the first random access feedback sent by the base station through the first control channel in the unlicensed frequency band is received.
  • the first random access feedback is used to indicate that the base station receives the random access preamble.
  • the first time window It belongs to the time window during which the terminal occupies the unlicensed frequency band;
  • the base station According to the first random access feedback, it is determined that the random access preamble is successfully received by the base station.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本公开是关于一种接入反馈方法、装置、基站、终端及存储介质，属于通信技术领域。方法包括：接收终端通过非授权频段发送的随机接入前导码；在第一时间窗口内，通过无退避先听后说LBT机制占用非授权频段中的第一控制信道，第一时间窗口属于终端占用非授权频段的时间窗口；通过第一控制信道发送第一随机接入反馈，第一随机接入反馈用于表示基站接收到随机接入前导码。终端通过在第一时间窗口内接收第一随机接入反馈，可以确定随机接入前导码被基站接收成功，无需再重新发送随机接入前导码，减少了不必要的时延，避免了通信资源的浪费，也避免了对其他设备造成干扰。

Description

接入反馈方法、装置、基站、终端及存储介质 技术领域
本公开是关于通信技术领域，具体来说是关于一种接入反馈方法、装置、基站、终端及存储介质。
背景技术
上行同步是指在同一小区中不同位置的终端发送的上行信号能够同步到达基站，在无线通信系统中，终端通常会在随机接入过程中与基站建立上行同步，从而能够减小不同终端之间的干扰，改善系统性能。
随机接入过程中，终端向基站发送随机接入前导码，基站接收到随机接入前导码，在预设时间窗口内向终端发送随机接入反馈，该随机接入反馈用于表示基站接收到随机接入前导码。相应地，如果终端在预设时间窗口内接收到该随机接入反馈，确定随机接入前导码发送成功，则根据该随机接入反馈与基站建立上行同步。如果终端在预设时间窗口内未接收到该随机接入反馈，确定随机接入前导码发送失败，则重新发送随机接入前导码。
传统的随机接入过程通过授权频段进行，而随着移动数据的快速增长，可用的授权频段逐渐趋于饱和，目前出现了频段短缺的问题。为了解决该问题，3GPP(3rd Generation Partnership Project，第三代合作伙伴计划)提出了通过非授权频段进行随机接入过程从而进行数据传输的方案。但是，如图1所示，在该方案中基站需要通过LBT(Listen Before Talk，先听后说)机制占用信道，才能通过占用的信道发送随机接入反馈。如果基站在预设时间窗口内占用信道失败，将无法发送随机接入反馈，终端无法在预设时间窗口内接收到随机接入反馈，则会误认为随机接入前导码发送失败，此时终端会重新发送随机接入前导码，增加了不必要的时延，造成了通信资源的浪费，还会对其他设备造成干扰。
发明内容
本公开提供了一种接入反馈方法、装置、基站、终端及存储介质，可以解决相关技术的问题。所述技术方案如下：
根据本公开实施例的第一方面，提供了一种接入反馈方法，应用于基站，所述方法包括：
接收终端通过非授权频段发送的随机接入前导码；
在第一时间窗口内，通过无退避先听后说LBT机制占用所述非授权频段中的第一控制信道，所述第一时间窗口属于所述终端占用所述非授权频段的时间窗口；
通过所述第一控制信道发送第一随机接入反馈，所述第一随机接入反馈用于表示所述基站接收到所述随机接入前导码。
在一种可能实现方式中，所述第一随机接入反馈包括所述随机接入前导码的指示信息；
所述指示信息为所述随机接入前导码，或者，所述指示信息为所述随机接入前导码的标识。
在另一种可能实现方式中，所述方法还包括：
在所述第一时间窗口内，通过无退避LBT机制占用所述非授权频段中的第二控制信道；
通过所述第二控制信道发送控制信令，所述控制信令携带资源指示信息，所述资源指示信息用于指示所述第一时间窗口内所述第一控制信道中用于发送所述第一随机接入反馈的资源；
所述通过所述第一控制信道发送第一随机接入反馈，包括：通过所述资源发送所述第一随机接入反馈。
在另一种可能实现方式中，所述方法还包括：
采用随机接入无线网络临时标识RA-RNTI对所述第一随机接入反馈进行加扰，所述RA-RNTI由发送所述随机接入前导码的资源确定。
在另一种可能实现方式中，所述方法还包括：
在所述第一时间窗口之后的第二时间窗口内，通过采用非固定长度窗口的随机退避LBT机制占用所述非授权频段中的第三控制信道；
通过所述第三控制信道发送第二随机接入反馈，所述第二随机接入反馈包括所述随机接入前导码的指示信息和控制信息，所述控制信息包括上行授权、定时提前命令、临时小区无线网络标识C-RNTI中的至少一项。
在另一种可能实现方式中，所述第一随机接入反馈包括多个终端发送的随机接入前导码对应的多个指示信息，所述方法还包括：
当所述多个指示信息的比特位长度小于预设长度时，在所述多个指示信息之后的比特位填充预设数值，以使填充后所述第一随机接入反馈的比特位长度等于所述预设长度。
根据本公开实施例的第二方面，提供了一种接入反馈方法，应用于终端，所述方法包括：
占用非授权频段，通过所述非授权频段向基站发送随机接入前导码；
在第一时间窗口内，接收所述基站通过所述非授权频段中的第一控制信道发送的第一随机接入反馈，所述第一随机接入反馈用于表示所述基站接收到所述随机接入前导码，所述第一时间窗口属于所述终端占用所述非授权频段的时间窗口；
根据所述第一随机接入反馈，确定所述随机接入前导码被所述基站接收成功。
在一种可能实现方式中，所述方法还包括：
如果在所述第一时间窗口内未接收到所述第一随机接入反馈，确定所述随机接入前导码发送失败，重新通过所述物理随机接入信道向所述基站发送所述随机接入前导码。
在另一种可能实现方式中，所述根据所述第一随机接入反馈，确定所述随机接入前导码被所述基站接收成功，包括：
当所述第一随机接入反馈中的指示信息与所述终端发送的随机接入前导码的指示信息相同时，确定所述随机接入前导码被所述基站接收成功，所述指示信息为所述随机接入前导码，或者，所述指示信息为所述随机接入前导码的标识。
在另一种可能实现方式中，所述方法还包括：
在所述第一时间窗口内，接收所述基站通过所述非授权频段中的第二控制信道发送的控制信令，所述控制信令携带资源指示信息；
根据所述资源指示信息，确定所述第一时间窗口内所述第一控制信道中用于发送所述第一随机接入反馈的资源；
所述在第一时间窗口内，接收所述基站通过所述非授权频段中的第一控制信道发送的第一随机接入反馈，包括：通过所述资源接收所述第一随机接入反馈。
在另一种可能实现方式中，所述第一随机接入反馈采用随机接入无线网络临时标识RA-RNTI加扰，所述RA-RNTI由发送所述随机接入前导码的资源确定；所述方法还包括：
采用所述RA-RNTI，对所述第一随机接入反馈进行解扰。
在另一种可能实现方式中，所述方法还包括：
在所述第一时间窗口之后的第二时间窗口内，接收所述基站通过所述非授权频段中的第三控制信道发送的第二随机接入反馈，所述第二随机接入反馈包括所述随机接入前导码的指示信息和控制信息，所述控制信息包括上行授权、定时提前命令、临时小区无线网络标识C-RNTI中的至少一项；
根据所述第二随机接入反馈，与所述基站建立上行同步。
根据本公开实施例的第三方面，提供了一种接入反馈装置，应用于基站，所述装置包括：
接收模块，用于接收终端通过非授权频段发送的随机接入前导码；
第一占用模块，用于在第一时间窗口内，通过无退避先听后说LBT机制占用所述非授权频段中的第一控制信道，所述第一时间窗口属于所述终端占用所述非授权频段的时间窗口；
第一发送模块，用于通过所述第一控制信道发送第一随机接入反馈，所述第一随机接入反馈用于表示所述基站接收到所述随机接入前导码。
在一种可能实现方式中，所述第一随机接入反馈包括所述随机接入前导码的指示信息；
所述指示信息为所述随机接入前导码，或者，所述指示信息为所述随机接入前导码的标识。
在另一种可能实现方式中，所述装置还包括：
第二占用模块，用于在所述第一时间窗口内，通过无退避LBT机制占用所述非授权频段中的第二控制信道；
第二发送模块，用于通过所述第二控制信道发送控制信令，所述控制信令携带资源指示信息，所述资源指示信息用于指示所述第一时间窗口内所述第一控制信道中用于发送所述第一随机接入反馈的资源；
所述第一发送模块，还用于通过所述资源发送所述第一随机接入反馈。
在另一种可能实现方式中，所述装置还包括：
加扰模块，用于采用随机接入无线网络临时标识RA-RNTI对所述第一随机接入反馈进行加扰，所述RA-RNTI由发送所述随机接入前导码的资源确定。
在另一种可能实现方式中，所述装置还包括：
第三占用模块，用于在所述第一时间窗口之后的第二时间窗口内，通过采用非固定长度窗口的随机退避LBT机制占用所述非授权频段中的第三控制信道；
第三发送模块，用于通过所述第三控制信道发送第二随机接入反馈，所述第二随机接入反馈包括所述随机接入前导码的指示信息和控制信息，所述控制信息包括上行授权、定时提前命令、临时小区无线网络标识C-RNTI中的至少一项。
在另一种可能实现方式中，所述第一随机接入反馈包括多个终端发送的随机接入前导码对应的多个指示信息，所述装置还包括：
填充模块，用于当所述多个指示信息的比特位长度小于预设长度时，在所述多个指示信息之后的比特位填充预设数值，以使填充后所述第一随机接入反馈的比特位长度等于所述预设长度。
根据本公开实施例的第四方面，提供了一种接入反馈装置，应用于终端，所述装置包括：
占用模块，用于占用非授权频段；
发送模块，用于通过所述非授权频段向基站发送随机接入前导码；
第一接收模块，用于在第一时间窗口内，接收所述基站通过所述非授权频段中的第一控制信道发送的第一随机接入反馈，所述第一随机接入反馈用于表示所述基站接收到所述随机接入前导码，所述第一时间窗口属于所述终端占用所述非授权频段的时间窗口；
第一确定模块，用于根据所述第一随机接入反馈，确定所述随机接入前导码被所述基站接收成功。
在一种可能实现方式中，所述第一确定模块，还用于如果在所述第一时间窗口内未接收到所述第一随机接入反馈，确定所述随机接入前导码发送失败；
所述发送模块，还用于重新通过所述物理随机接入信道向所述基站发送所述随机接入前导码。
在另一种可能实现方式中，所述第一确定模块，还用于当所述第一随机接 入反馈中的指示信息与所述终端发送的随机接入前导码的指示信息相同时，确定所述随机接入前导码被所述基站接收成功，所述指示信息为所述随机接入前导码，或者，所述指示信息为所述随机接入前导码的标识。
在另一种可能实现方式中，所述装置还包括：
第二接收模块，用于在所述第一时间窗口内，接收所述基站通过所述非授权频段中的第二控制信道发送的控制信令，所述控制信令携带资源指示信息；
第二确定模块，用于根据所述资源指示信息，确定所述第一时间窗口内所述第一控制信道中用于发送所述第一随机接入反馈的资源；
所述第一接收模块，还用于通过所述资源接收所述第一随机接入反馈。
在另一种可能实现方式中，所述第一随机接入反馈采用随机接入无线网络临时标识RA-RNTI加扰，所述RA-RNTI由发送所述随机接入前导码的资源确定；所述装置还包括：
解扰模块，用于采用所述RA-RNTI，对所述第一随机接入反馈进行解扰。
在另一种可能实现方式中，所述装置还包括：
第三接收模块，用于在所述第一时间窗口之后的第二时间窗口内，接收所述基站通过所述非授权频段中的第三控制信道发送的第二随机接入反馈，所述第二随机接入反馈包括所述随机接入前导码的指示信息和控制信息，所述控制信息包括上行授权、定时提前命令、临时小区无线网络标识C-RNTI中的至少一项；
建立模块，用于根据所述第二随机接入反馈，与所述基站建立上行同步。
根据本公开实施例的第五方面，提供了一种基站，所述基站包括：
处理器；
用于存储处理器可执行指令的存储器；
其中，所述处理器被配置为：
接收终端通过非授权频段发送的随机接入前导码；
在第一时间窗口内，通过无退避先听后说LBT机制占用所述非授权频段中的第一控制信道，所述第一时间窗口属于所述终端占用所述非授权频段的时间窗口；
通过所述第一控制信道发送第一随机接入反馈，所述第一随机接入反馈用于表示所述基站接收到所述随机接入前导码。
根据本公开实施例的第六方面，提供了一种终端，所述终端包括：
所述终端包括：
处理器；
用于存储处理器可执行指令的存储器；
其中，所述处理器被配置为：
占用非授权频段，通过所述非授权频段向基站发送随机接入前导码；
在第一时间窗口内，接收所述基站通过所述非授权频段中的第一控制信道发送的第一随机接入反馈，所述第一随机接入反馈用于表示所述基站接收到所述随机接入前导码，所述第一时间窗口属于所述终端占用所述非授权频段的时间窗口；
根据所述第一随机接入反馈，确定所述随机接入前导码被所述基站接收成功。
根据本公开实施例的第七方面，提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有至少一条指令，所述指令由处理器加载并执行以实现如第一方面所述的接入反馈方法中所执行的操作。
根据本公开实施例的第八方面，提供了一种计算机可读存储介质，所述计算机可读存储介质中存储有至少一条指令，所述指令由处理器加载并执行以实现如第二方面所述的接入反馈方法中所执行的操作。
本公开实施例提供的方法、装置、基站、终端及存储介质，基站接收终端通过非授权频段发送的随机接入前导码，在第一时间窗口内，通过无退避先听后说LBT机制占用非授权频段中的第一控制信道，通过第一控制信道发送第一随机接入反馈，第一时间窗口属于终端占用非授权频段的时间窗口，第一随机接入反馈用于表示基站接收到随机接入前导码，终端在第一时间窗口内通过第一控制信道接收基站发送的第一随机接入反馈，确定随机接入前导码被基站接收成功，无需再重新发送随机接入前导码，减少了不必要的时延，避免了通信资源的浪费，也避免了对其他设备造成干扰。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。
图1是根据一示例性实施例示出的一种基站接入信道失败的示意图；
图2是根据一示例性实施例示出的一种通信系统的结构示意图；
图3是根据一示例性实施例示出的一种接入反馈方法的流程图；
图4是根据一示例性实施例示出的一种接入反馈方法的流程图；
图5是根据一示例性实施例示出的一种接入反馈方法的流程图；
图6是根据一示例性实施例示出的一种第一随机接入反馈的结构图；
图7是根据一示例性实施例示出的一种第二随机接入反馈的结构图；
图8是根据一示例性实施例示出的一种MAC层消息的结构图；
图9是根据一示例性实施例示出的一种MAC PDU头部的结构图；
图10是根据一示例性实施例示出的一种接入反馈方法的流程图；
图11是根据一示例性实施例示出的另一种接入反馈方法的时序示意图；
图12是根据一示例性实施例示出的一种接入反馈装置的框图；
图13是根据一示例性实施例示出的一种接入反馈装置的框图；
图14是根据一示例性实施例示出的一种基站的框图；
图15是根据一示例性实施例示出的一种终端的框图。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚明白，下面结合实施方式和附图，对本公开做进一步详细说明。在此，本公开的示意性实施方式及其说明用于解释本公开，但并不作为对本公开的限定。
本公开实施例提供一种接入反馈方法、装置、基站、终端及存储介质，以下结合附图对本公开进行详细说明。
图2是根据一示例性实施例示出的一种通信系统的结构示意图，如图2所示，该通信系统包括终端201和基站202，终端201与基站202之间通过通信网络连接。
本公开实施例中，终端201可以占用非授权频段，通过非授权频段与基站202进行通信。
其中，在随机接入过程中，终端201向基站202发送随机接入前导码，基 站202接收终端201发送的随机接入前导码，在第一时间窗口内向终端发送第一随机接入反馈，在第二时间窗口内向终端发送第二随机接入反馈，第一时间窗口属于终端占用非授权频段的时间窗口，第二时间窗口位于第一时间窗口之后。
图3是根据一示例性实施例示出的一种接入反馈方法的流程图，应用于如图2所示的基站，如图3所示，包括以下步骤：
在步骤301中，接收终端通过非授权频段发送的随机接入前导码。
在步骤302中，在第一时间窗口内，通过无退避先听后说LBT机制占用非授权频段中的第一控制信道。
其中，第一时间窗口属于终端占用非授权频段的时间窗口。
在步骤303中，通过第一控制信道发送第一随机接入反馈。
第一随机接入反馈用于表示基站接收到随机接入前导码。
本公开实施例提供的方法，基站接收终端通过非授权频段发送的随机接入前导码，在第一时间窗口内，通过无退避先听后说LBT机制占用非授权频段中的第一控制信道，通过第一控制信道发送第一随机接入反馈，第一时间窗口属于终端占用非授权频段的时间窗口，第一随机接入反馈用于表示基站接收到随机接入前导码，终端在第一时间窗口内通过第一控制信道接收基站发送的第一随机接入反馈，确定随机接入前导码被基站接收成功，无需再重新发送随机接入前导码，减少了不必要的时延，避免了通信资源的浪费，也避免了对其他设备造成干扰。
在一种可能实现方式中，第一随机接入反馈包括随机接入前导码的指示信息；
指示信息为随机接入前导码，或者，指示信息为随机接入前导码的标识。
在另一种可能实现方式中，方法还包括：
在第一时间窗口内，通过无退避LBT机制占用非授权频段中的第二控制信道；
通过第二控制信道发送控制信令，控制信令携带资源指示信息，资源指示信息用于指示第一时间窗口内第一控制信道中用于发送第一随机接入反馈的资源；
通过第一控制信道发送第一随机接入反馈，包括：通过资源发送第一随机 接入反馈。
在另一种可能实现方式中，方法还包括：
采用随机接入无线网络临时标识RA-RNTI对第一随机接入反馈进行加扰，RA-RNTI由发送随机接入前导码的资源确定。
在另一种可能实现方式中，方法还包括：
在第一时间窗口之后的第二时间窗口内，通过采用非固定长度窗口的随机退避LBT机制占用非授权频段中的第三控制信道；
通过第三控制信道发送第二随机接入反馈，第二随机接入反馈包括随机接入前导码的指示信息和控制信息，控制信息包括上行授权、定时提前命令、临时小区无线网络标识C-RNTI中的至少一项。
在一种可能实现方式中，第一随机接入反馈包括多个终端发送的随机接入前导码对应的多个指示信息，方法还包括：
当多个指示信息的比特位长度小于预设长度时，在多个指示信息之后的比特位填充预设数值，以使填充后第一随机接入反馈的比特位长度等于预设长度。
图4是根据一示例性实施例示出的一种接入反馈方法的流程图，应用于如图2所示的终端，如图4所示，包括以下步骤：
在步骤401中，占用非授权频段，通过非授权频段向基站发送随机接入前导码。
在步骤402中，在第一时间窗口内，接收基站通过非授权频段中的第一控制信道发送的第一随机接入反馈。
其中，第一随机接入反馈用于表示基站接收到随机接入前导码，第一时间窗口属于终端占用非授权频段的时间窗口。
在步骤403中，根据第一随机接入反馈，确定随机接入前导码被基站接收成功。
本公开实施例提供的方法，终端占用非授权频段，通过非授权频段上的物理随机接入信道向基站发送随机接入前导码，在第一时间窗口内，接收基站通过该非授权频段中的第一控制信道发送的第一随机接入反馈，根据该第一随机接入反馈，确定随机接入前导码发送成功。其中，第一随机接入反馈用于表示基站接收到随机接入前导码，第一时间窗口属于终端占用非授权频段的时间窗口。终端通过在第一时间窗口内接收第一随机接入反馈，可以确定随机接入前 导码被基站接收成功，无需再重新发送随机接入前导码，减少了不必要的时延，避免了通信资源的浪费，也避免了对其他设备造成干扰。
在一种可能实现方式中，方法还包括：
如果在第一时间窗口内未接收到第一随机接入反馈，确定随机接入前导码发送失败，重新通过物理随机接入信道向基站发送随机接入前导码。
在另一种可能实现方式中，根据第一随机接入反馈，确定随机接入前导码被基站接收成功，包括：
当第一随机接入反馈中的指示信息与终端发送的随机接入前导码的指示信息相同时，确定随机接入前导码被基站接收成功，指示信息为随机接入前导码，或者，指示信息为随机接入前导码的标识。
在另一种可能实现方式中，方法还包括：
在第一时间窗口内，接收基站通过非授权频段中的第二控制信道发送的控制信令，控制信令携带资源指示信息；
根据资源指示信息，确定第一时间窗口内第一控制信道中用于发送第一随机接入反馈的资源；
在第一时间窗口内，接收基站通过非授权频段中的第一控制信道发送的第一随机接入反馈，包括：通过资源接收第一随机接入反馈。
在另一种可能实现方式中，第一随机接入反馈采用随机接入无线网络临时标识RA-RNTI加扰，RA-RNTI由发送随机接入前导码的资源确定；方法还包括：
采用RA-RNTI，对第一随机接入反馈进行解扰。
在另一种可能实现方式中，方法还包括：
在第一时间窗口之后的第二时间窗口内，接收基站通过非授权频段中的第三控制信道发送的第二随机接入反馈，第二随机接入反馈包括随机接入前导码的指示信息和控制信息，控制信息包括上行授权、定时提前命令、临时小区无线网络标识C-RNTI中的至少一项；
根据第二随机接入反馈，与基站建立上行同步。
图5是根据一示例性实施例提出的一种接入反馈方法的流程图，交互主体为基站和终端，如图5所示，包括以下步骤：
在步骤501中，终端占用非授权频段，通过非授权频段向基站发送随机接入前导码。
在步骤502中，基站接收终端发送的随机接入前导码。
通常基站可以配置授权频段，基站与终端之间通过授权频段进行通信。而为了解决频段短缺的问题，目前基站也可以配置非授权频段，基站与终端之间可以通过非授权频段进行通信。其中，非授权频段与授权频段不同。
但是，由于非授权频段为公共频段，任一设备要使用非授权频段时，需要通过LBT(Listen Before Talk，先听后说)占用非授权频段。
其中，通过LBT机制占用非授权频段是指，检测非授权频段的状态，当该非授权频段处于空闲状态时，占用非授权频段成功，从而能够通过非授权频段进行通信，而当该非授权频段处于繁忙状态时，占用非授权频段失败。
目前提出了以下四类机制：
1、无LBT机制，称为CAT 1 LBT(Category 1 LBT，第一类LBT)；
2、无退避LBT机制，称为CAT 2 LBT(Category 2 LBT，第二类LBT)；
3、采用固定长度窗口的随机退避LBT机制，称为CAT 3 LBT(Category 3 LBT，第三类LBT)；
4、采用非固定长度窗口的随机退避LBT机制，称为CAT 4 LBT(Category 4 LBT，第四类LBT)。
本公开实施例应用于终端的随机接入过程中，当终端需要与基站建立上行连接时，获取随机接入前导码，通过LBT机制占用非授权频段，占用成功时，终端即可通过非授权频段向基站发送随机接入前导码。基站通过该非授权频段接收随机接入前导码，从而获知终端需要与基站建立上行同步。
其中，终端可以通过上述四种LBT机制中的任一种LBT机制占用非授权频段，如CAT 2 LBT机制或CAT 4 LBT机制等，本公开实施例不做限定。
另外，该随机接入前导码可以由终端从基站配置的多个随机接入前导码中随机选择，或者由基站为终端配置，或者还可以采用其他方式确定。该随机接入前导码可以作为终端与基站建立上行同步的指示标识，后续基站根据终端的随机接入前导码实现同步。并且，不同终端的随机接入前导码不同，从而能够避免不同终端之间产生冲突。
在一种可能实现方式中，终端占用非授权频段成功时，通过非授权频段中的物理随机接入信道向基站发送随机接入前导码，基站通过该物理随机接入信道接收随机接入前导码，从而获知终端需要与基站建立上行同步。其中，物理随机接入信道为供终端向基站发送随机接入前导码的信道，可以为PRACH (Physical Random Access Channel，物理随机接入信道)或者还可以其他用于发送随机接入前导码的信道。在终端发送随机接入前导码之前，基站可以通过广播的形式指示终端非授权频段中的物理随机接入信道，或者基站可以预先为终端配置非授权频段中的物理随机接入信道，或者还可以采用其他方式确定非授权频段中的物理随机接入信道。
在步骤503中，基站在第一时间窗口内，通过无退避LBT机制占用非授权频段中的第二控制信道，通过第二控制信道发送控制信令。
相关技术中，终端发送随机接入前导码，而基站接收到随机接入前导码后，应当在预设时间窗口内向终端发送随机接入反馈，指示终端基站已经接收到随机接入前导码。如果终端在预设时间窗口内未接收到随机接入反馈，会确定随机接入前导码失败，进而重新发送该随机接入前导码。
而在非授权频段的场景下，如果基站在预设时间窗口内占用信道失败，将无法发送随机接入反馈，终端也就无法在预设时间窗口内接收到随机接入反馈，会误认为随机接入前导码发送失败，则终端会提升功率，重新发送随机接入前导码。
为了解决上述技术问题，本公开实施例提供了一种基站提前发送随机接入反馈的方式。由于终端占用非授权频段成功后，可在一段时间内持续占用该非授权频段，这段时间即为终端占用非授权频段的时间窗口。而终端发送随机接入前导码之后，该非授权频段将会处于空闲状态。那么，在该时间窗口内，基站可以通过无退避LBT机制快速占用该非授权频段，从而能够通过该非授权频段快速发送随机接入反馈。
因此，为了提前发送随机接入反馈，基站接收到随机接入前导码后，可以在第一时间窗口内通过占用非授权频段的方式发送控制信令，指示基站发送第一随机接入反馈的资源，再通过该资源发送第一随机接入反馈，该第一随机接入反馈用于表示基站已经成功接收到随机接入前导码。
为此，基站首先在第一时间窗口内，通过无退避LBT机制占用非授权频段中的第二控制信道，该第一时间窗口属于终端非授权频段的时间窗口。占用第二控制信道成功时，基站通过第二控制信道发送控制信令。
其中，该第一时间窗口可以由基站预先配置，该第二控制信道可以为PDCCH(Physical Downlink Control Channel，物理下行控制信道)或者其他信道。该控制信令包括资源指示信息，该资源指示信息用于指示第一时间窗口内第一 控制信道中用于发送第一随机接入反馈的资源，可以为时域资源和/或频域资源，或者还可以为其他资源。该控制信令可以为DCI(DownlinkControl Information，下行控制信息)或者其他类型的信令。
在步骤504中，终端接收基站发送的控制信令，根据资源指示信息，确定第一时间窗口内第一控制信道中用于发送第一随机接入反馈的资源。
基站通过第二控制信道发送控制信令，终端即可通过第二控制信道接收该控制信令，根据控制信令中的资源指示信息，确定在第一时间窗口内的第一控制信道中用于发送第一随机接入反馈的资源。后续终端可以通过该资源接收基站发送的第一随机接入反馈。
需要说明的是，步骤503-504为可选方案，在另一实施例中，还可以不执行步骤503-504，而是采用其他方式告知终端用于发送第一随机接入反馈的资源，当基站接收终端发送的随机接入前导码后，直接通过执行下述步骤505-507，发送随机接入反馈，而无需发送控制信令。
在步骤505中，在第一时间窗口内，基站通过无退避LBT机制占用非授权频段中的第一控制信道，通过第一控制信道中的资源发送第一随机接入反馈。
在步骤506中，终端通过该资源，接收基站发送的第一随机接入反馈。
基站通过第二控制信道发送控制信令之后，通过无退避LBT机制占用非授权频段中的第一控制信道，通过控制信令中指示的资源发送第一随机接入反馈。第一随机接入反馈用于表示基站接收到随机接入前导码。
由于此时还属于终端占用非授权频段的时间窗口内，基站通过无退避LBT机制可以快速占用第一控制信道，从而能够在第一时间窗口内发送第一随机接入反馈。终端通过该资源接收该第一随机接入反馈，即可在第一时间窗口内接收第一随机接入反馈。
其中，该第一控制信道可以为PDSCH(Physical Downlink Shared Channel，物理下行共享信道)或者其他信道。
在一种可能实现方式中，第一随机接入反馈包括随机接入前导码的指示信息，该指示信息可以为随机前导码本身，或者，该指示信息为随机接入前导码的标识，其中，该标识与随机接入前导码唯一对应，可以为RAPID(Random Access Preamble Index，随机接入前导码序号)或随机接入前导码的索引，或者还可以为其他与随机接入前导码唯一对应的标识。该标识可以包含任意个比特位，如6个比特位。
在另一种可能实现方式中，基站采用RA-RNTI(Random Access Radio Network Temporary Identifier，随机接入无线网络临时标识)对第一随机接入反馈进行加扰，其中，该RA-RNTI由发送随机接入前导码的资源确定。只有发送随机接入前导码的资源对应的RA-RNTI与加扰时采用的RA-RNTI相同的终端才可以通过正确的RA-RNTI对该第一随机接入反馈进行解扰，从而接收该第一随机接入反馈，读取该第一随机接入反馈中携带的信息。
在另一种可能实现方式中，由于多个终端相互独立，可能会共同竞争非授权频段。当该多个终端同时占用非授权频段成功时，可能会通过非授权频段中的同一资源发送随机接入前导码，导致基站同时接收多个终端的随机接入前导码。
此种情况下，如图6所示，基站根据接收到的多个随机接入前导码发送第一随机接入反馈，该第一随机接入反馈中携带多个随机接入前导码对应的多个指示信息。为了保持第一随机接入反馈的长度一致，基站可以设置预设长度，生成比特位长度等于该预设长度的第一随机接入反馈，将多个指示信息填充至第一随机接入反馈，当该多个指示信息的比特位长度小于预设长度时，在多个指示信息之后的比特位填充预设数值，以使填充后第一随机接入反馈的比特位长度等于预设长度。其中，该预设长度可以为任意正整数，该预设数值可以为0、1或其他数值。
另外，基站还可以设置预设数量，发送的第一随机接入反馈中指示信息的数量不超过该预设数量，即每次最多对预设数量的终端进行随机接入反馈。
在步骤507中，终端根据第一随机接入反馈，确定随机接入前导码被基站接收成功。
终端在第一时间窗口内接收第一随机接入反馈后，可以确定随机接入前导码被基站接收成功，从而确定无需再重新发送随机接入前导码。后续过程中，终端可以在第一时间窗口之后的第二时间窗口内等待接收第二随机接入反馈，从而根据第二随机接入反馈进行上行同步。
在一种可能实现方式中，当第一随机接入反馈中的指示信息与终端发送的随机接入前导码的指示信息相同时，确定随机接入前导码被基站接收成功。当第一随机接入反馈中的指示信息与终端发送的随机接入前导码的指示信息不同时，确定随机接入前导码发送失败，此时重新发送随机接入前导码。其中，该指示信息可以为随机接入前导码本身，或者随机接入前导码的标识。
在另一种可能实现方式中，当第一随机接入反馈中包括多个指示信息时，判断该多个指示信息中是否包括终端发送的随机接入前导码的指示信息，如果该多个指示信息中包括终端发送的随机接入前导码的指示信息，确定随机接入前导码被基站接收成功，如果该多个指示信息中不包括终端发送的随机接入前导码的指示信息，确定随机接入前导码发送失败，此时重新发送随机接入前导码。
本公开实施例仅是以终端在第一时间窗口内接收到第一随机接入反馈为例进行说明，而在另一实施例中，如果基站未接收到终端发送的随机接入前导码，则无法在第一时间窗口内发送第一随机接入反馈。终端在第一时间窗口内未接收到第一随机接入反馈，则确定随机接入前导码发送失败，需要重新发送随机接入前导码。
因此终端重新占用非授权频段，通过非授权频段中的物理随机接入信道向基站发送随机接入前导码，而不再等待在第二时间窗口内未接收到随机接入反馈时再重新发送随机接入前导码，从而在发送随机接入前导码失败的情况下，也能够提前重新发送，缩短了时延，提高了随机接入过程的效率。
在步骤508中，基站在第一时间窗口之后的第二时间窗口内，通过采用非固定长度窗口的随机退避LBT机制占用非授权频段中的第三控制信道，通过第三控制信道发送第二随机接入反馈。
在步骤509中，终端在第二时间窗口内，通过第三控制信道接收第二随机接入反馈，根据第二随机接入反馈，与基站建立上行同步。
其中，第二时间窗口位于第一时间窗口之后，该第二时间窗口与该第一时间窗口相邻，或者与该第一时间窗口之间具有一定的时间间隔。该第二时间窗口可以由基站预先配置。
由于从基站接收到随机接入前导码到基站准备发送随机接入反馈，需要一定的时间间隔。因此，基站发送第二随机接入反馈的第二时间窗口可能已经不属于终端占用非授权频段的时间窗口，基站若要在第二时间窗口内发送第二随机接入反馈，需要重新通过采用非固定长度窗口的随机退避LBT机制占用非授权频段中的第三控制信道。
其中，该第三控制信道可以为PDSCH或者其他信道，且该第三控制信道与该第一控制信道可以为相同信道，也可以为不同信道。
其中，第二随机接入反馈包括随机接入前导码的指示信息和控制信息，该 控制信息包括上行授权、定时提前命令、临时C-RNTI(Cell Radio Network Temporary Identifier，小区无线网络标识)中的至少一项。上行授权用于指示允许终端向基站发送数据的授权，定时提前命令用于指示终端提前向基站发送数据的时间。临时C-RNTI是由基站分配给终端的一个动态标识，唯一标识了一个小区空口下的终端，只有处于连接态下的终端的C-RNTI才有效。例如，第二随机接入反馈可以如图7所示。
在一种可能实现方式中，第二随机接入反馈中也可以包括多个终端的指示信息和控制信息，同一终端的指示信息和控制信息建立对应关系，每个终端可以根据本端的随机接入前导码的指示信息获取对应的控制信息，根据获取到的控制信息与基站建立上行同步。
例如，参见图8，第二随机接入反馈由MAC(Media Access Control Protocol Data Unit，媒体接入控制)层消息发送，多个终端的指示信息和控制信息复用在一个MAC层消息中，每个MAC PDU(Media Access Control Protocol Data Unit，媒体接入控制协议数据单元)中，如图9所示，通过MAC PDU头部的RAPID区分不同的终端，通过MAC RAR(Random Access Response，随机接入反馈)下发控制信息。
第二随机接入反馈与第一随机接入反馈的区别如下表1所示，参见表1，第一随机接入反馈包含更少的信息，发送第一随机接入反馈需要较少的时间，可以实现快速发送，从而快速通知终端基站已经接收到随机接入前导码。而第二随机接入反馈包含更多的信息，发送第二随机接入反馈需要较多的时间，终端根据第二随机接入反馈可以建立与基站的上行同步。
表1
Figure PCTCN2019072429-appb-000001
本公开实施例中，如图10和图11所示，终端占用非授权频段，向基站发送随机接入前导码后，在终端占用非授权频段的时间窗口内，通过无退避LBT 接入信道，快速反馈第一随机接入反馈，本次反馈仅用来确认随机接入前导码被基站接收成功。在发送第一随机接入反馈后，基站再通过采用非固定长度窗口的随机退避LBT机制接入信道，发送传统的第二随机接入反馈。
需要说明的是，在上述步骤408-409之前，基站也可以通过采用非固定长度窗口的随机退避LBT机制占用控制信道，通过控制信道向终端发送控制信令，该控制信令中包括该第三控制信道中用于发送第二随机接入反馈的资源指示信息，终端接收到该控制信令，即可确定对应的资源。则在步骤408-409中，基站通过第三控制信道中的该资源发送第二随机接入反馈，终端通过该资源接收第二随机接入反馈。
本公开实施例提供的方法，终端占用非授权频段，通过非授权频段上的物理随机接入信道向基站发送随机接入前导码，基站在该物理随机接入信道上接收随机接入前导码后，在终端占用非授权频段的第一时间窗口内，通过无退避LBT机制占用非授权频段中的第一控制信道和第二控制信道，先通过第二控制信道发送指示第一随机接入反馈的第一控制信道的资源的控制信令，再通过第一控制信道的资源发送第一随机接入反馈，终端根据控制信令在第一时间窗口内，通过第一控制信道的资源上接收第一随机接入反馈，确定随机接入前导码被基站接收成功，无需再重新发送随机接入前导码，减少了不必要的时延，避免了通信资源的浪费，也避免了对其他设备造成干扰。
本公开实施例提供了一种应用于非授权频段的随机接入反馈方式，有效避免了在非授权频段的场景下由于LBT的影响而使终端冗余发送随机接入前导码的情况，从整体上看减少了随机接入时延。
图12是根据一示例性实施例示出的一种接入反馈装置的框图。参见图12，该装置应用于基站中，该装置包括：接收模块1201、第一占用模块1202以及第一发送模块1203。
接收模块1201，用于接收终端通过非授权频段发送的随机接入前导码；
第一占用模块1202，用于在第一时间窗口内，通过无退避先听后说LBT机制占用非授权频段中的第一控制信道，第一时间窗口属于终端占用非授权频段的时间窗口；
第一发送模块1203，用于通过第一控制信道发送第一随机接入反馈，第一随机接入反馈用于表示基站接收到随机接入前导码。
本公开实施例提供的装置，接收终端通过非授权频段发送的随机接入前导码，在第一时间窗口内，通过无退避先听后说LBT机制占用非授权频段中的第一控制信道，通过第一控制信道发送第一随机接入反馈，第一时间窗口属于终端占用非授权频段的时间窗口，第一随机接入反馈用于表示基站接收到随机接入前导码，终端在第一时间窗口内通过第一控制信道接收基站发送的第一随机接入反馈，确定随机接入前导码被基站接收成功，无需再重新发送随机接入前导码，减少了不必要的时延，避免了通信资源的浪费，也避免了对其他设备造成干扰。
在一种可能实现方式中，第一随机接入反馈包括随机接入前导码的指示信息；
指示信息为随机接入前导码，或者，指示信息为随机接入前导码的标识。
在另一种可能实现方式中，装置还包括：
第二占用模块，用于在第一时间窗口内，通过无退避LBT机制占用非授权频段中的第二控制信道；
第二发送模块，用于通过第二控制信道发送控制信令，控制信令携带资源指示信息，资源指示信息用于指示第一时间窗口内第一控制信道中用于发送第一随机接入反馈的资源；
第一发送模块1203，还用于通过资源发送第一随机接入反馈。
在另一种可能实现方式中，装置还包括：
加扰模块，用于采用随机接入无线网络临时标识RA-RNTI对第一随机接入反馈进行加扰，RA-RNTI由发送随机接入前导码的资源确定。
在另一种可能实现方式中，装置还包括：
第三占用模块，用于在第一时间窗口之后的第二时间窗口内，通过采用非固定长度窗口的随机退避LBT机制占用非授权频段中的第三控制信道；
第三发送模块，用于通过第三控制信道发送第二随机接入反馈，第二随机接入反馈包括随机接入前导码的指示信息和控制信息，控制信息包括上行授权、定时提前命令、临时小区无线网络标识C-RNTI中的至少一项。
在另一种可能实现方式中，第一随机接入反馈包括多个终端发送的随机接入前导码对应的多个指示信息，装置还包括：
填充模块，用于当多个指示信息的比特位长度小于预设长度时，在多个指示信息之后的比特位填充预设数值，以使填充后第一随机接入反馈的比特位长 度等于预设长度。
需要说明的是：上述实施例提供的接入反馈装置在接入反馈时，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，即将基站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。另外，上述实施例提供的接入反馈装置与接入反馈方法实施例属于同一构思，其具体实现过程详见方法实施例，这里不再赘述。
图13是根据一示例性实施例示出的一种接入反馈装置的框图。参见图13，该装置应用于终端中，该装置包括：占用模块1301、发送模块1302、第一接收模块1303以及第一确定模块1304。
占用模块1301，用于占用非授权频段；
发送模块1302，用于通过非授权频段向基站发送随机接入前导码；
第一接收模块1303，用于在第一时间窗口内，接收基站通过非授权频段中的第一控制信道发送的第一随机接入反馈，第一随机接入反馈用于表示基站接收到随机接入前导码，第一时间窗口属于终端占用非授权频段的时间窗口；
第一确定模块1304，用于根据第一随机接入反馈，确定随机接入前导码被基站接收成功。
本公开实施例提供的装置，占用非授权频段，通过非授权频段上的物理随机接入信道向基站发送随机接入前导码，在第一时间窗口内，接收基站通过该非授权频段中的第一控制信道发送的第一随机接入反馈，根据该第一随机接入反馈，确定随机接入前导码发送成功。其中，第一随机接入反馈用于表示基站接收到随机接入前导码，第一时间窗口属于终端占用非授权频段的时间窗口。通过在第一时间窗口内接收第一随机接入反馈，可以确定随机接入前导码被基站接收成功，无需再重新发送随机接入前导码，减少了不必要的时延，避免了通信资源的浪费，也避免了对其他设备造成干扰。
在一种可能实现方式中，第一确定模块1304，还用于如果在第一时间窗口内未接收到第一随机接入反馈，确定随机接入前导码发送失败；
发送模块1302，还用于重新通过物理随机接入信道向基站发送随机接入前导码。
在另一种可能实现方式中，第一确定模块1304，还用于当第一随机接入反 馈中的指示信息与终端发送的随机接入前导码的指示信息相同时，确定随机接入前导码被基站接收成功，指示信息为随机接入前导码，或者，指示信息为随机接入前导码的标识。
在另一种可能实现方式中，装置还包括：
第二接收模块，用于在第一时间窗口内，接收基站通过非授权频段中的第二控制信道发送的控制信令，控制信令携带资源指示信息；
第二确定模块，用于根据资源指示信息，确定第一时间窗口内第一控制信道中用于发送第一随机接入反馈的资源；
第一接收模块1303，还用于通过资源接收第一随机接入反馈。
在另一种可能实现方式中，第一随机接入反馈采用随机接入无线网络临时标识RA-RNTI加扰，RA-RNTI由发送随机接入前导码的资源确定；装置还包括：
解扰模块，用于采用RA-RNTI，对第一随机接入反馈进行解扰。
在另一种可能实现方式中，装置还包括：
第三接收模块，用于在第一时间窗口之后的第二时间窗口内，接收基站通过非授权频段中的第三控制信道发送的第二随机接入反馈，第二随机接入反馈包括随机接入前导码的指示信息和控制信息，控制信息包括上行授权、定时提前命令、临时小区无线网络标识C-RNTI中的至少一项；
建立模块，用于根据第二随机接入反馈，与基站建立上行同步。
需要说明的是：上述实施例提供的接入反馈装置在接入反馈时，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，即将终端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。另外，上述实施例提供的接入反馈装置与接入反馈方法实施例属于同一构思，其具体实现过程详见方法实施例，这里不再赘述。
图14是根据一示例性实施例示出的一种基站的框图。参见图14，该基站包括处理器1401、用于存储处理器可执行指令的存储器1402及收发器1403。其中，处理器1401被配置为执行如下指令：
接收终端通过非授权频段发送的随机接入前导码；
在第一时间窗口内，通过无退避先听后说LBT机制占用非授权频段中的第一控制信道，第一时间窗口属于终端占用非授权频段的时间窗口；
通过第一控制信道发送第一随机接入反馈，第一随机接入反馈用于表示基站接收到随机接入前导码。
还提供了一种计算机可读存储介质，当计算机可读存储介质中的指令由基站的处理器执行时，使得基站能够执行上述实施例中的接入反馈方法。
图15是根据一示例性实施例示出的一种终端的框图。例如，终端1500可以是移动电话，计算机，数字广播装置，消息收发设备，游戏控制台，平板设备，医疗设备，健身设备，个人数字助理等。
参照图15，终端1500可以包括以下一个或多个组件：处理组件1502，存储器1504，电源组件1506，多媒体组件1508，音频组件1510，输入/输出(I/O)的接口1512，传感器组件1514，以及通信组件1516。
处理组件1502通常控制终端1500的整体操作，诸如与显示，电话呼叫，数据通信，相机操作和记录操作相关联的操作。处理组件1502可以包括一个或多个处理器1520来执行指令，以完成上述的方法的全部或部分步骤。此外，处理组件1502可以包括一个或多个模块，便于处理组件1502和其他组件之间的交互。例如，处理组件1502可以包括多媒体模块，以方便多媒体组件1508和处理组件1502之间的交互。
存储器1504被配置为存储各种类型的数据以支持在终端1500的操作。这些数据的示例包括用于在终端1500上操作的任何应用程序或方法的指令，联系人数据，电话簿数据，消息，图片，视频等。存储器1504可以由任何类型的易失性或非易失性存储设备或者它们的组合实现，如静态随机存取存储器(SRAM)，电可擦除可编程只读存储器(EEPROM)，可擦除可编程只读存储器(EPROM)，可编程只读存储器(PROM)，只读存储器(ROM)，磁存储器，快闪存储器，磁盘或光盘。
电源组件1506为终端1500的各种组件提供电力。电源组件1506可以包括电源管理系统，一个或多个电源，及其他与为终端1500生成、管理和分配电力相关联的组件。
多媒体组件1508包括在所述终端1500和用户之间的提供一个输出接口的屏幕。在一些实施例中，屏幕可以包括液晶显示器(LCD)和触摸面板(TP)。如果屏幕包括触摸面板，屏幕可以被实现为触摸屏，以接收来自用户的输入信号。触摸面板包括一个或多个触摸传感器以感测触摸、滑动和触摸面板上的手 势。所述触摸传感器可以不仅感测触摸或滑动动作的边界，而且还检测与所述触摸或滑动操作相关的持续时间和压力。在一些实施例中，多媒体组件1508包括一个前置摄像头和/或后置摄像头。当终端1500处于操作模式，如拍摄模式或视频模式时，前置摄像头和/或后置摄像头可以接收外部的多媒体数据。每个前置摄像头和后置摄像头可以是一个固定的光学透镜系统或具有焦距和光学变焦能力。
音频组件1510被配置为输出和/或输入音频信号。例如，音频组件1510包括一个麦克风(MIC)，当终端1500处于操作模式，如呼叫模式、记录模式和语音识别模式时，麦克风被配置为接收外部音频信号。所接收的音频信号可以被进一步存储在存储器1504或经由通信组件1516发送。在一些实施例中，音频组件1510还包括一个扬声器，用于输出音频信号。
I/O接口1512为处理组件1502和外围接口模块之间提供接口，上述外围接口模块可以是键盘，点击轮，按钮等。这些按钮可包括但不限于：主页按钮、音量按钮、启动按钮和锁定按钮。
传感器组件1514包括一个或多个传感器，用于为终端1500提供各个方面的状态评估。例如，传感器组件1514可以检测到终端1500的打开/关闭状态，组件的相对定位，例如所述组件为终端1500的显示器和小键盘，传感器组件1514还可以检测终端1500或终端1500一个组件的位置改变，用户与终端1500接触的存在或不存在，终端1500方位或加速/减速和终端1500的温度变化。传感器组件1514可以包括接近传感器，被配置用来在没有任何的物理接触时检测附近物体的存在。传感器组件1514还可以包括光传感器，如CMOS或CCD图像传感器，用于在成像应用中使用。在一些实施例中，该传感器组件1514还可以包括加速度传感器，陀螺仪传感器，磁传感器，压力传感器或温度传感器。
通信组件1516被配置为便于终端1500和其他设备之间有线或无线方式的通信。终端1500可以接入基于通信标准的无线网络，如Wi-Fi，2G或3G，或它们的组合。在一个示例性实施例中，通信组件1516经由广播信道接收来自外部广播管理系统的广播信号或广播相关信息。在一个示例性实施例中，所述通信组件1516还包括近场通信(NFC)模块，以促进短程通信。
在示例性实施例中，终端1500可以被一个或多个应用专用集成电路(ASIC)、数字信号处理器(DSP)、数字信号处理设备(DSPD)、可编程逻辑器件(PLD)、现场可编程门阵列(FPGA)、控制器、微控制器、微处理器或其 他电子元件实现，用于执行上述接入反馈方法。
在示例性实施例中，还提供了一种包括指令的非临时性计算机可读存储介质，例如包括指令的存储器1504，上述指令可由终端1500的处理器1520执行以完成上述方法。例如，所述非临时性计算机可读存储介质可以是ROM、随机存取存储器(RAM)、CD-ROM、磁带、软盘和光数据存储设备等。
还提供了一种计算机可读存储介质，当所述计算机可读存储介质中的指令由终端的处理器执行时，使得终端能够执行上述实施例中的方法，所述方法包括：
占用非授权频段，通过非授权频段向基站发送随机接入前导码；
在第一时间窗口内，接收基站通过非授权频段中的第一控制信道发送的第一随机接入反馈，第一随机接入反馈用于表示基站接收到随机接入前导码，第一时间窗口属于终端占用非授权频段的时间窗口；
根据第一随机接入反馈，确定随机接入前导码被基站接收成功。
本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成，也可以通过程序来指令相关的硬件完成，所述的程序可以存储于一种获取机可读存储介质中，上述提到的存储介质可以是只读存储器，磁盘或光盘等。
以上仅为本公开实施例的一些可选实施例，并不用以限制本公开，凡在本公开实施例的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开实施例的保护范围之内。

Claims (28)

  1. 一种接入反馈方法，其特征在于，应用于基站，所述方法包括：
    接收终端通过非授权频段发送的随机接入前导码；
    在第一时间窗口内，通过无退避先听后说LBT机制占用所述非授权频段中的第一控制信道，所述第一时间窗口属于所述终端占用所述非授权频段的时间窗口；
    通过所述第一控制信道发送第一随机接入反馈，所述第一随机接入反馈用于表示所述基站接收到所述随机接入前导码。
  2. 根据权利要求1所述的方法，其特征在于，所述第一随机接入反馈包括所述随机接入前导码的指示信息；
    所述指示信息为所述随机接入前导码，或者，所述指示信息为所述随机接入前导码的标识。
  3. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    在所述第一时间窗口内，通过无退避LBT机制占用所述非授权频段中的第二控制信道；
    通过所述第二控制信道发送控制信令，所述控制信令携带资源指示信息，所述资源指示信息用于指示所述第一时间窗口内所述第一控制信道中用于发送所述第一随机接入反馈的资源；
    所述通过所述第一控制信道发送第一随机接入反馈，包括：通过所述资源发送所述第一随机接入反馈。
  4. 根据权利要求1所述的方法，其特征在于，所述方法还包括：
    采用随机接入无线网络临时标识RA-RNTI对所述第一随机接入反馈进行加扰，所述RA-RNTI由发送所述随机接入前导码的资源确定。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，所述方法还包括：
    在所述第一时间窗口之后的第二时间窗口内，通过采用非固定长度窗口的随机退避LBT机制占用所述非授权频段中的第三控制信道；
    通过所述第三控制信道发送第二随机接入反馈，所述第二随机接入反馈包 括所述随机接入前导码的指示信息和控制信息，所述控制信息包括上行授权、定时提前命令、临时小区无线网络标识C-RNTI中的至少一项。
  6. 根据权利要求1-4任一项所述的方法，其特征在于，所述第一随机接入反馈包括多个终端发送的随机接入前导码对应的多个指示信息，所述方法还包括：
    当所述多个指示信息的比特位长度小于预设长度时，在所述多个指示信息之后的比特位填充预设数值，以使填充后所述第一随机接入反馈的比特位长度等于所述预设长度。
  7. 一种接入反馈方法，其特征在于，应用于终端，所述方法包括：
    占用非授权频段，通过所述非授权频段向基站发送随机接入前导码；
    在第一时间窗口内，接收所述基站通过所述非授权频段中的第一控制信道发送的第一随机接入反馈，所述第一随机接入反馈用于表示所述基站接收到所述随机接入前导码，所述第一时间窗口属于所述终端占用所述非授权频段的时间窗口；
    根据所述第一随机接入反馈，确定所述随机接入前导码被所述基站接收成功。
  8. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    如果在所述第一时间窗口内未接收到所述第一随机接入反馈，确定所述随机接入前导码发送失败，重新通过所述物理随机接入信道向所述基站发送所述随机接入前导码。
  9. 根据权利要求7所述的方法，其特征在于，所述根据所述第一随机接入反馈，确定所述随机接入前导码被所述基站接收成功，包括：
    当所述第一随机接入反馈中的指示信息与所述终端发送的随机接入前导码的指示信息相同时，确定所述随机接入前导码被所述基站接收成功，所述指示信息为所述随机接入前导码，或者，所述指示信息为所述随机接入前导码的标识。
  10. 根据权利要求7所述的方法，其特征在于，所述方法还包括：
    在所述第一时间窗口内，接收所述基站通过所述非授权频段中的第二控制信道发送的控制信令，所述控制信令携带资源指示信息；
    根据所述资源指示信息，确定所述第一时间窗口内所述第一控制信道中用于发送所述第一随机接入反馈的资源；
    所述在第一时间窗口内，接收所述基站通过所述非授权频段中的第一控制信道发送的第一随机接入反馈，包括：通过所述资源接收所述第一随机接入反馈。
  11. 根据权利要求7所述的方法，其特征在于，所述第一随机接入反馈采用随机接入无线网络临时标识RA-RNTI加扰，所述RA-RNTI由发送所述随机接入前导码的资源确定；所述方法还包括：
    采用所述RA-RNTI，对所述第一随机接入反馈进行解扰。
  12. 根据权利要求7-11任一项所述的方法，其特征在于，所述方法还包括：
    在所述第一时间窗口之后的第二时间窗口内，接收所述基站通过所述非授权频段中的第三控制信道发送的第二随机接入反馈，所述第二随机接入反馈包括所述随机接入前导码的指示信息和控制信息，所述控制信息包括上行授权、定时提前命令、临时小区无线网络标识C-RNTI中的至少一项；
    根据所述第二随机接入反馈，与所述基站建立上行同步。
  13. 一种接入反馈装置，其特征在于，应用于基站，所述装置包括：
    接收模块，用于接收终端通过非授权频段发送的随机接入前导码；
    第一占用模块，用于在第一时间窗口内，通过无退避先听后说LBT机制占用所述非授权频段中的第一控制信道，所述第一时间窗口属于所述终端占用所述非授权频段的时间窗口；
    第一发送模块，用于通过所述第一控制信道发送第一随机接入反馈，所述第一随机接入反馈用于表示所述基站接收到所述随机接入前导码。
  14. 根据权利要求13所述的装置，其特征在于，所述第一随机接入反馈包括所述随机接入前导码的指示信息；
    所述指示信息为所述随机接入前导码，或者，所述指示信息为所述随机接入前导码的标识。
  15. 根据权利要求13所述的装置，其特征在于，所述装置还包括：
    第二占用模块，用于在所述第一时间窗口内，通过无退避LBT机制占用所述非授权频段中的第二控制信道；
    第二发送模块，用于通过所述第二控制信道发送控制信令，所述控制信令携带资源指示信息，所述资源指示信息用于指示所述第一时间窗口内所述第一控制信道中用于发送所述第一随机接入反馈的资源；
    所述第一发送模块，还用于通过所述资源发送所述第一随机接入反馈。
  16. 根据权利要求13所述的装置，其特征在于，所述装置还包括：
    加扰模块，用于采用随机接入无线网络临时标识RA-RNTI对所述第一随机接入反馈进行加扰，所述RA-RNTI由发送所述随机接入前导码的资源确定。
  17. 根据权利要求13-16任一项所述的装置，其特征在于，所述装置还包括：
    第三占用模块，用于在所述第一时间窗口之后的第二时间窗口内，通过采用非固定长度窗口的随机退避LBT机制占用所述非授权频段中的第三控制信道；
    第三发送模块，用于通过所述第三控制信道发送第二随机接入反馈，所述第二随机接入反馈包括所述随机接入前导码的指示信息和控制信息，所述控制信息包括上行授权、定时提前命令、临时小区无线网络标识C-RNTI中的至少一项。
  18. 根据权利要求13-16任一项所述的装置，其特征在于，所述第一随机接入反馈包括多个终端发送的随机接入前导码对应的多个指示信息，所述装置还包括：
    填充模块，用于当所述多个指示信息的比特位长度小于预设长度时，在所述多个指示信息之后的比特位填充预设数值，以使填充后所述第一随机接入反馈的比特位长度等于所述预设长度。
  19. 一种接入反馈装置，其特征在于，应用于终端，所述装置包括：
    占用模块，用于占用非授权频段；
    发送模块，用于通过所述非授权频段向基站发送随机接入前导码；
    第一接收模块，用于在第一时间窗口内，接收所述基站通过所述非授权频段中的第一控制信道发送的第一随机接入反馈，所述第一随机接入反馈用于表示所述基站接收到所述随机接入前导码，所述第一时间窗口属于所述终端占用所述非授权频段的时间窗口；
    第一确定模块，用于根据所述第一随机接入反馈，确定所述随机接入前导码被所述基站接收成功。
  20. 根据权利要求19所述的装置，其特征在于，所述第一确定模块，还用于如果在所述第一时间窗口内未接收到所述第一随机接入反馈，确定所述随机接入前导码发送失败；
    所述发送模块，还用于重新通过所述物理随机接入信道向所述基站发送所述随机接入前导码。
  21. 根据权利要求19所述的装置，其特征在于，所述第一确定模块，还用于当所述第一随机接入反馈中的指示信息与所述终端发送的随机接入前导码的指示信息相同时，确定所述随机接入前导码被所述基站接收成功，所述指示信息为所述随机接入前导码，或者，所述指示信息为所述随机接入前导码的标识。
  22. 根据权利要求19所述的装置，其特征在于，所述装置还包括：
    第二接收模块，用于在所述第一时间窗口内，接收所述基站通过所述非授权频段中的第二控制信道发送的控制信令，所述控制信令携带资源指示信息；
    第二确定模块，用于根据所述资源指示信息，确定所述第一时间窗口内所述第一控制信道中用于发送所述第一随机接入反馈的资源；
    所述第一接收模块，还用于通过所述资源接收所述第一随机接入反馈。
  23. 根据权利要求19所述的装置，其特征在于，所述第一随机接入反馈采用随机接入无线网络临时标识RA-RNTI加扰，所述RA-RNTI由发送所述随机接入前导码的资源确定；所述装置还包括：
    解扰模块，用于采用所述RA-RNTI，对所述第一随机接入反馈进行解扰。
  24. 根据权利要求19-23任一项所述的装置，其特征在于，所述装置还包括：
    第三接收模块，用于在所述第一时间窗口之后的第二时间窗口内，接收所述基站通过所述非授权频段中的第三控制信道发送的第二随机接入反馈，所述第二随机接入反馈包括所述随机接入前导码的指示信息和控制信息，所述控制信息包括上行授权、定时提前命令、临时小区无线网络标识C-RNTI中的至少一项；
    建立模块，用于根据所述第二随机接入反馈，与所述基站建立上行同步。
  25. 一种基站，其特征在于，所述基站包括：
    处理器；
    用于存储处理器可执行指令的存储器；
    其中，所述处理器被配置为：
    接收终端通过非授权频段发送的随机接入前导码；
    在第一时间窗口内，通过无退避先听后说LBT机制占用所述非授权频段中的第一控制信道，所述第一时间窗口属于所述终端占用所述非授权频段的时间窗口；
    通过所述第一控制信道发送第一随机接入反馈，所述第一随机接入反馈用于表示所述基站接收到所述随机接入前导码。
  26. 一种终端，其特征在于，所述终端包括：
    处理器；
    用于存储处理器可执行指令的存储器；
    其中，所述处理器被配置为：
    占用非授权频段，通过所述非授权频段向基站发送随机接入前导码；
    在第一时间窗口内，接收所述基站通过所述非授权频段中的第一控制信道发送的第一随机接入反馈，所述第一随机接入反馈用于表示所述基站接收到所述随机接入前导码，所述第一时间窗口属于所述终端占用所述非授权频段的时间窗口；
    根据所述第一随机接入反馈，确定所述随机接入前导码被所述基站接收成 功。
  27. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有至少一条指令，所述指令由处理器加载并执行以实现如权利要求1至6任一权利要求所述的接入反馈方法中所执行的操作。
  28. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有至少一条指令，所述指令由处理器加载并执行以实现如权利要求7至12任一权利要求所述的接入反馈方法中所执行的操作。
PCT/CN2019/072429 2019-01-18 2019-01-18 接入反馈方法、装置、基站、终端及存储介质 Ceased WO2020147129A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP19910817.6A EP3914019B1 (en) 2019-01-18 2019-01-18 Access feedback methods and apparatuses, base station, terminal, and storage media
CN201980000082.0A CN109863812B (zh) 2019-01-18 2019-01-18 接入反馈方法、装置、基站、终端及存储介质
US17/422,431 US12289765B2 (en) 2019-01-18 2019-01-18 Access feedback method, base station, terminal, and storage medium
PCT/CN2019/072429 WO2020147129A1 (zh) 2019-01-18 2019-01-18 接入反馈方法、装置、基站、终端及存储介质

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2019/072429 WO2020147129A1 (zh) 2019-01-18 2019-01-18 接入反馈方法、装置、基站、终端及存储介质

Publications (1)

Publication Number Publication Date
WO2020147129A1 true WO2020147129A1 (zh) 2020-07-23

Family

ID=66889390

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/072429 Ceased WO2020147129A1 (zh) 2019-01-18 2019-01-18 接入反馈方法、装置、基站、终端及存储介质

Country Status (4)

Country Link
US (1) US12289765B2 (zh)
EP (1) EP3914019B1 (zh)
CN (1) CN109863812B (zh)
WO (1) WO2020147129A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114554478A (zh) * 2020-11-25 2022-05-27 深圳市万普拉斯科技有限公司 用户设备能力信息处理方法、装置、移动设备和存储介质

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112087807B (zh) * 2019-06-13 2025-04-29 中兴通讯股份有限公司 一种实现上行授权的方法及装置和基站
WO2021062628A1 (en) * 2019-09-30 2021-04-08 Zte Corporation Method and system for data transmission in wireless network
CN115174018B (zh) * 2021-04-06 2025-04-04 展讯通信（上海）有限公司 一种控制信令译码方法和电子设备
CN115220793B (zh) * 2022-06-07 2026-01-13 稔果子(广州)科技有限公司 一种唯一标识符的生成方法及装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018047885A1 (ja) * 2016-09-09 2018-03-15 株式会社Ｎｔｔドコモ ユーザ端末及び無線通信方法
CN108476532A (zh) * 2016-02-02 2018-08-31 英特尔Ip公司 随机接入过程期间的先听后说(lbt)失败
CN108781463A (zh) * 2016-03-02 2018-11-09 英特尔Ip公司 非授权频谱中的低延迟prach设计

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150195849A1 (en) * 2014-01-06 2015-07-09 Intel IP Corporation Systems, methods and devices for multiple signal co-existence in multiple-use frequency spectrum
US20160050667A1 (en) 2014-08-18 2016-02-18 Samsung Electronics Co., Ltd. Communication on licensed and unlicensed bands
EP3225070A1 (en) * 2014-11-26 2017-10-04 IDAC Holdings, Inc. Initial access in high frequency wireless systems
JP6746595B2 (ja) 2015-03-26 2020-08-26 アップル インコーポレイテッドＡｐｐｌｅ Ｉｎｃ． 低減されたシグナリングオーバヘッドでのアップリンク送信のためのシステム、方法およびデバイス
US10548167B2 (en) * 2015-05-13 2020-01-28 Lg Electronics Inc. Method and device for performing random access process in unlicensed band
US10420147B2 (en) * 2015-07-05 2019-09-17 Ofinno, Llc Random access process in carrier aggregation
EP3337231A1 (en) 2015-08-13 2018-06-20 NTT DoCoMo, Inc. User terminal, wireless base station, and wireless communication method
CN106993335B (zh) * 2016-01-21 2022-03-01 中兴通讯股份有限公司 前导码发送、接收方法、装置、用户设备及基站
CN107371273B (zh) * 2016-05-13 2023-05-30 中兴通讯股份有限公司 随机接入方法、装置及用户设备
BR112019007229B1 (pt) * 2017-02-01 2021-11-23 Lg Electronics Inc. Método e dispositivo para solicitar informações de sistema
CN106937404B (zh) * 2017-03-20 2020-03-17 北京邮电大学 一种在未授权频谱上降低随机接入时延的方法
EP3624409B1 (en) * 2017-06-09 2023-08-09 Huawei Technologies Co., Ltd. Remote device of base station, base station and random access method
US10893543B2 (en) * 2017-10-30 2021-01-12 Samsung Electronics Co., Ltd. Method and apparatus for random access design of NR unlicensed
EP3586469B1 (en) * 2018-01-09 2020-12-02 Ofinno, LLC Physical and mac layer processes in a wireless device
US11013036B2 (en) * 2018-06-14 2021-05-18 Samsung Electronics Co., Ltd. Method and apparatus on enhancements of NR random access for unlicensed operations
US11202320B2 (en) * 2018-09-05 2021-12-14 Samsung Electronics Co., Ltd. Method and apparatus of performing random access on unlicensed carrier
CN110944401B (zh) * 2018-09-21 2022-04-22 华为技术有限公司 随机接入方法、终端设备及网络设备

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108476532A (zh) * 2016-02-02 2018-08-31 英特尔Ip公司 随机接入过程期间的先听后说(lbt)失败
CN108781463A (zh) * 2016-03-02 2018-11-09 英特尔Ip公司 非授权频谱中的低延迟prach设计
WO2018047885A1 (ja) * 2016-09-09 2018-03-15 株式会社Ｎｔｔドコモ ユーザ端末及び無線通信方法

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CMCC: "Discussion on Uplink Control Signalling Transmission for LAA", 3GPP DRAFT; R1-160496, 19 February 2016 (2016-02-19), St Julian’s, Malta, pages 1 - 2, XP051063818 *
SAMSUNG: "LBT Types for NR-U", 3GPP DRAFT; R2-1817094, 16 November 2018 (2018-11-16), Spokane, WA, USA, pages 1 - 2, XP051481014 *
See also references of EP3914019A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114554478A (zh) * 2020-11-25 2022-05-27 深圳市万普拉斯科技有限公司 用户设备能力信息处理方法、装置、移动设备和存储介质
CN114554478B (zh) * 2020-11-25 2023-12-15 深圳市万普拉斯科技有限公司 用户设备能力信息处理方法、装置、移动设备和存储介质

Also Published As

Publication number Publication date
EP3914019A1 (en) 2021-11-24
CN109863812B (zh) 2022-12-27
CN109863812A (zh) 2019-06-07
EP3914019B1 (en) 2024-07-03
US20220078850A1 (en) 2022-03-10
EP3914019A4 (en) 2022-08-03
US12289765B2 (en) 2025-04-29

Similar Documents

Publication Publication Date Title
CN110115096B (zh) 随机接入方法、装置及计算机可读存储介质
US20250386341A1 (en) Method for allocating time domain resources, data transmission method, base station, and terminal
CN111294937B (zh) 数据传输方法及装置
CN109863812B (zh) 接入反馈方法、装置、基站、终端及存储介质
CN111226487B (zh) 随机接入方法及装置、通信设备及存储介质
US11876625B2 (en) Hybrid automatic repeat request feedback method and apparatus, user equipment, and base station
CN110771248B (zh) 搜索空间配置、随机接入方法和装置、存储介质
US11722283B2 (en) Information transmission method, device, system, and storage medium
WO2021000295A1 (zh) 随机接入方法、装置、系统及存储介质
WO2020237509A1 (zh) 随机接入方法、装置、系统及存储介质
US12156247B2 (en) Method and apparatus for detecting unlicensed frequency band
US12028172B2 (en) Method and device for scheduling hybrid automatic repeat request
CN113597814B (zh) Drx定时器的启动方法、装置、通信设备及存储介质
EP3869722B1 (en) Signalling multiple resources for transmitting a/n in an uplink unlicensed channel
EP3826208B1 (en) Data transmission method and apparatus, and storage medium
WO2021063153A1 (zh) 信息处理方法、网元设备、终端及存储介质
CN113517963A (zh) 上行信号/信道处理方法、装置及可读存储介质
WO2024011467A1 (zh) 辅助信息上报方法、装置、存储介质、终端以及网络侧设备
EP4404657A1 (en) Processing method and apparatus for temporary reference signal cluster, communication device, and storage medium

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19910817

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2019910817

Country of ref document: EP

Effective date: 20210818

WWG Wipo information: grant in national office

Ref document number: 17422431

Country of ref document: US