WO2021159983A1 - 通信方法及装置 - Google Patents

通信方法及装置 Download PDF

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Publication number
WO2021159983A1
WO2021159983A1 PCT/CN2021/074666 CN2021074666W WO2021159983A1 WO 2021159983 A1 WO2021159983 A1 WO 2021159983A1 CN 2021074666 W CN2021074666 W CN 2021074666W WO 2021159983 A1 WO2021159983 A1 WO 2021159983A1
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WIPO (PCT)
Prior art keywords
cell
rach configuration
timing
access network
deviation
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Application number
PCT/CN2021/074666
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English (en)
French (fr)
Inventor
张宏平
胡星星
张宏卓
曾清海
Original Assignee
华为技术有限公司
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.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP21753794.3A priority Critical patent/EP4096276A4/en
Publication of WO2021159983A1 publication Critical patent/WO2021159983A1/zh
Priority to US17/887,135 priority patent/US20220394779A1/en

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/005—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by adjustment in the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the embodiments of the present application relate to communication technologies, and in particular, to a communication method and device.
  • the 5G communication system supports the self-organized networks (SON) mechanism, which aims to automatically complete the parameter configuration and optimization of cellular mobile communication network equipment, reduce manual participation in the process of network operation and management, improve network reliability, and reduce operations cost.
  • SON self-organized networks
  • One of the functions of SON is self-optimization.
  • Self-optimization means that network equipment adjusts wireless parameters adaptively according to the operating conditions of the network to optimize the performance of the network.
  • Self-optimization includes random access channel (RACH) optimization.
  • RACH optimization aims to adjust the RACH configuration of the cell to avoid conflicts between the RACH configuration of the cell and the RACH configuration of the neighboring cell, so as to ensure the success rate and access delay of the terminal equipment randomly accessing the cell.
  • the RACH configuration of a cell is determined by the DU to which the cell belongs.
  • the DU judges whether the RACH configuration of the cell conflicts with the RACH configuration of the neighboring cell of the cell based on the RACH report reported by the terminal equipment of the cell connected to the DU and the RACH configuration of the neighboring cell of the cell.
  • the DU can optimize the RACH configuration of the cell, that is, the DU changes some or all of the RACH configuration parameters of the conflicting cell, so as to avoid the conflict.
  • the embodiments of the present application provide a communication method and device to solve the technical problem that when the cell under the DU and the neighboring cell adopt different timings, the DU cannot identify whether the RACH configuration of the cell conflicts with the RACH configuration of the neighboring cell.
  • the embodiments of the present application provide a communication method, which may be applied to the CU of the first access network device, and may also be applied to the chip in the CU.
  • the method will be described below by taking the application to the CU as an example.
  • the CU of the first access network device can obtain the timing deviation between the first cell and the second cell.
  • the first cell mentioned here is a cell under the DU of the first access network device
  • the second cell is an adjacent cell of the first cell.
  • the aforementioned second cell may be a cell under the DU, a cell under another DU of the first access network device, or a cell under the second access network device.
  • the above-mentioned timing deviation between the first cell and the second cell refers to the timing deviation of the two cells.
  • it may include: frame number deviation and frame boundary deviation between the first cell and the second cell; or, frame number deviation, subframe number deviation, and subframe boundary deviation between the first cell and the second cell; or, the first cell and the second cell The time deviation of the two cells relative to the frame boundary of the same frame, etc.
  • the CU of the first access network device may send the timing deviation between the first cell and the second cell to the DU of the first access network device.
  • the DU can learn the timing deviation between the first cell and the second cell.
  • this method is applied to the RACH optimization scenario, when the cell under the DU of the access network device and the neighboring cell adopt different timings, the DU can accurately identify the timing deviation between the cell and the neighboring cell sent by the CU Whether there is a RACH configuration conflict between the cell and the neighboring cell, the RACH configuration of the cell can be optimized when a conflict occurs, so as to ensure the success rate and access delay of random access of the terminal equipment.
  • the foregoing CU may send the timing deviation between the first cell and the second cell to the DU in the following ways:
  • the first method DU actively requests to obtain the timing deviation.
  • the CU receives a request message from the DU, which requests to obtain the timing deviation between the first cell and the second cell, or requests to obtain the random access channel RACH configuration of the second cell. Then, the CU should send the timing deviation between the first cell and the second cell to the DU based on the request message.
  • the above request message may carry the identity of the first cell.
  • the second way the CU sends the timing deviation to the DU during the F1 establishment process.
  • the CU receives the F1 establishment request message from the DU, and then the CU sends an F1 establishment response message to the DU.
  • the F1 establishment response message includes the timing deviation between the first cell and the second cell.
  • the third way the CU actively sends the timing deviation.
  • the CU sends a CU configuration update message to the DU, and the CU configuration update message includes the timing deviation between the first cell and the second cell.
  • the CU can send the timing deviation between the first cell and the second cell to the DU through different messages, which expands the scenario in which the DU obtains the timing deviation.
  • the foregoing CU may obtain the timing deviation between the first cell and the second cell in the following ways: for example, the CU receives the timing deviation between the first cell and the second cell from the terminal device. Or, when the second cell is a cell under the second access network device, the CU may also receive the timing deviation between the first cell and the second cell from the second access network device.
  • the implementation manner for the CU to obtain the timing offset between the first cell and the second cell is extended.
  • the embodiments of the present application provide a communication method, which can be applied to the DU of the first access network device and can also be applied to the chip in the DU.
  • the method will be described below by taking the application to the DU as an example.
  • the DU of the first access network device may receive the timing deviation between the first cell and the second cell of the CU of the first access network device. Then, the DU can save the timing deviation between the first cell and the second cell.
  • the first aspect For the description of the first cell, the second cell, and the timing deviation between the first cell and the second cell, reference may be made to the first aspect.
  • the method may further include: the DU receives the random access channel RACH configuration of the second cell from the CU. Then, the DU determines whether the RACH configuration of the first cell conflicts with the RACH configuration of the second cell according to the timing deviation between the first cell and the second cell, the RACH configuration of the second cell, and the RACH configuration of the first cell.
  • the DU can reset the RACH configuration for the first cell. For example, the DU can change part or all of the RACH configuration parameters of the first cell, so as to avoid conflicts with the RACH configuration of the second cell. If the RACH configuration of the first cell does not conflict with the RACH configuration of the second cell, the DU may not do any processing.
  • the embodiments of the present application provide a communication method, which may be applied to the CU of the first access network device, and may also be applied to the chip in the CU.
  • the method will be described below by taking the application to the CU as an example.
  • the CU of the first access network device can obtain the first RACH configuration of the second cell, where the first RACH configuration of the second cell is based on the timing of the first cell. Then, the CU of the first access network device may send the first RACH configuration of the second cell to the DU of the first access network device.
  • the first cell and the second cell reference may be made to the foregoing first aspect.
  • the DU can learn the first RACH configuration of the second cell.
  • the DU when the cell under the DU of the access network device and the neighboring cell adopt different timings, the DU can be based on the RACH configuration of the neighboring cell sent by the CU based on the timing of the cell, and The cell is based on the RACH configuration of the cell timing, that is, based on the RACH configuration of the two cells at the same timing, it can accurately identify whether the cell has a RACH configuration conflict with the neighboring cell, and then the RACH of the cell can be The configuration is optimized to ensure the success rate and access delay of random access of the terminal equipment.
  • the CU may obtain the first RACH configuration of the second cell in the following two ways:
  • the first way the CU obtains the timing offset between the first cell and the second cell, and the second RACH configuration of the second cell.
  • the second RACH configuration of the second cell is based on the timing of the second cell.
  • the CU converts the second RACH configuration of the second cell to the first RACH configuration of the second cell according to the timing deviation between the first cell and the second cell.
  • the first CU may not have a timing deviation between the first cell and these cells. In this scenario, the first CU may not perform the RACH configuration conversion operation.
  • the second way when the second cell is a cell under the second access network device, the CU may receive the first RACH configuration of the second cell from the second access network device.
  • the second access network device may not have a timing deviation between the first cell and the second cell.
  • the second access network device may not perform the RACH configuration conversion operation, but send the second RACH configuration of the second cell to the CU of the first access network device. Therefore, in order to enable the CU of the first access network device to accurately learn the received RACH configuration of the second cell based on which cell timing the RACH configuration, the CU of the first access network device receives from the second access network device.
  • the first RACH configuration of the second cell of the network access device may include: the CU of the first access network device receives the RACH configuration of the second cell of the second access network device from the second access network device, and the first indication information. Wherein, the first indication information indicates that the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell.
  • the CU may send the first RACH configuration of the second cell to the DU in the following three ways:
  • the first way the DU actively requests to obtain the RACH configuration of the second cell.
  • the CU receives a request message from the DU, requesting to obtain the RACH configuration of the second cell. Then, the CU sends the first RACH configuration of the second cell to the DU based on the request message.
  • the above request message may carry the identity of the first cell.
  • the second way the CU sends the first RACH configuration of the second cell to the DU during the F1 establishment process. For example, the CU receives the F1 establishment request message from the DU. Then, the CU sends an F1 setup response message to the DU, where the F1 setup response message includes the first RACH configuration of the second cell.
  • the third way the CU actively sends the first RACH configuration of the second cell.
  • the CU sends a CU configuration update message to the DU, where the CU configuration update message includes the first RACH configuration of the second cell.
  • the CU can send the first RACH configuration of the second cell to the DU through different messages, which extends the scenario in which the DU obtains the first RACH configuration of the second cell.
  • some of the RACH configurations of the second cell acquired by the above-mentioned CU are not RACH configurations based on the timing of the first cell.
  • the first CU may not send these to the first DU.
  • There is no RACH configuration of the second cell based on the timing of the first cell that is, only the RACH configuration of the second cell based on the timing of the first cell is sent.
  • the first CU sends the RACH configuration of the second cell to the first DU it may also carry second indication information, the second indication information indicating whether the RACH configuration of the second cell is based on the RACH timing of the first cell Configuration. In this way, after the first DU receives the RACH configuration of the second cell sent by the first CU, it can learn whether the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell based on the second indication information.
  • the embodiments of the present application provide a communication method, which can be applied to the DU of the first access network device and can also be applied to the chip in the DU.
  • the method will be described below by taking the application to the DU as an example.
  • the DU of the first access network device receives the first RACH configuration of the second cell of the CU of the first access network device.
  • the first RACH configuration of the second cell is based on the timing of the first cell.
  • the DU of the first access network device may save the first RACH configuration of the second cell.
  • the method may further include: the DU determines whether the RACH configuration of the first cell conflicts with the first RACH configuration of the second cell according to the first RACH configuration of the second cell and the RACH configuration of the first cell.
  • the DU resets the RACH configuration for the first cell.
  • the DU can change part or all of the RACH configuration parameters of the first cell, so as to avoid conflicts with the RACH configuration of the second cell. If the RACH configuration of the first cell does not conflict with the first RACH configuration of the second cell, the DU may not do any processing.
  • an embodiment of the present application provides a communication device.
  • the communication device may include: a processing module and a sending module.
  • the communication device may further include: a first receiving module and/or a second receiving module.
  • the processing module is used to obtain the timing deviation between the first cell and the second cell.
  • the first cell is a cell under the DU
  • the second cell is an adjacent cell of the first cell
  • both the CU and the DU belong to the first access network device.
  • the above-mentioned timing deviation between the first cell and the second cell refers to the timing deviation of the two cells.
  • it may include: frame number deviation and frame boundary deviation between the first cell and the second cell; or, frame number deviation, subframe number deviation, and subframe boundary deviation between the first cell and the second cell; or, the first cell and the second cell The time deviation of the two cells relative to the frame boundary of the same frame, etc.
  • the processing module is specifically configured to obtain the timing deviation between the first cell and the second cell through the timing deviation between the first cell and the second cell received from the terminal device by the second receiving module.
  • the processing module and the second receiving module may also be integrated into the processing module or the second receiving module.
  • the processing module is specifically configured to use the second receiving module to receive the timing deviation between the first cell and the second cell from the second access network device. Acquire the timing deviation between the first cell and the second cell.
  • the processing module and the second receiving module may also be integrated into the processing module or the second receiving module.
  • the sending module is used to send the timing deviation between the first cell and the second cell to the DU.
  • the first receiving module is used to receive a request message from the DU.
  • the request message requests to obtain the timing deviation between the first cell and the second cell, or requests to obtain the random access channel RACH configuration of the second cell.
  • the sending module is specifically configured to send the timing deviation between the first cell and the second cell to the DU based on the request message.
  • the request message carries the identity of the first cell.
  • the first receiving module is configured to receive the F1 establishment request message from the DU.
  • the sending module is specifically configured to send an F1 setup response message to the DU, where the F1 setup response message includes the timing deviation between the first cell and the second cell;
  • the sending module is specifically configured to send a CU configuration update message to the DU, where the CU configuration update message includes the timing deviation between the first cell and the second cell.
  • an embodiment of the present application provides a communication device.
  • the communication device may include: a receiving module and a storage module.
  • the communication device may further include: a processing module.
  • the receiving module is used to receive the timing deviation between the first cell and the second cell from the centralized unit CU.
  • the first cell is a cell under the DU
  • the second cell is an adjacent cell of the first cell
  • both the CU and the DU belong to the first access network device.
  • the storage module is used to store the timing deviation between the first cell and the second cell.
  • the receiving module is also used to receive the random access channel RACH configuration of the second cell from the CU.
  • the processing module is configured to determine the RACH configuration of the first cell and the RACH configuration of the second cell according to the timing deviation between the first cell and the second cell, the RACH configuration of the second cell, and the RACH configuration of the first cell Whether it conflicts.
  • the processing module can also be used to reset the RACH configuration for the first cell when the RACH configuration of the first cell conflicts with the RACH configuration of the second cell.
  • an embodiment of the present application provides a communication device.
  • the communication device may include: a processing module and a sending module.
  • the communication device may further include a first receiving module and/or a second receiving module.
  • the processing module is used to obtain the first RACH configuration of the second cell.
  • the first RACH configuration of the second cell is based on the timing of the first cell.
  • the first cell is a cell under the distributed unit DU
  • the second cell is an adjacent cell of the first cell
  • both CU and DU belong to the first access network device.
  • the processing module can be used to obtain the timing deviation between the first cell and the second cell, the second RACH configuration of the second cell, and according to the timing deviation between the first cell and the second cell, the second RACH of the second cell
  • the configuration is converted to the first RACH configuration of the second cell.
  • the second RACH configuration of the second cell is based on the timing of the second cell.
  • the above-mentioned timing deviation between the first cell and the second cell refers to the timing deviation of the two cells.
  • it may include: frame number deviation and frame boundary deviation between the first cell and the second cell; or, frame number deviation, subframe number deviation, and subframe boundary deviation between the first cell and the second cell; or, the first cell and the second cell The time deviation of the two cells relative to the frame boundary of the same frame, etc.
  • the processing module may obtain the timing deviation between the first cell and the second cell through the timing deviation between the first cell and the second cell received from the terminal device by the first receiving module. At this time, the processing module and the first receiving module may also be integrated into the processing module or the first receiving module.
  • the processing module may obtain the first cell from the second access network device's timing deviation from the second cell by the first receiving module. The timing deviation between one cell and the second cell.
  • the processing module and the first receiving module may also be integrated into the processing module or the first receiving module.
  • the processing module may receive the first RACH configuration of the second cell from the second access network device through the first receiving module.
  • the processing module may receive the RACH configuration of the second cell from the second access network device through the first receiving module, and the first indication information, the first indication information indicates the RACH of the second cell The configuration is based on the RACH configuration of the first cell timing.
  • the sending module is used to send the first RACH configuration of the second cell to the DU.
  • the second receiving module is configured to receive a request message from the DU, the request message requesting to obtain the RACH configuration of the second cell.
  • the sending module is specifically configured to send the first RACH configuration of the second cell to the DU based on the request message.
  • the request message carries the identity of the first cell.
  • the second receiving module is configured to receive the F1 establishment request message from the DU.
  • the sending module is specifically configured to send an F1 setup response message to the DU, and the F1 setup response message includes the first RACH configuration of the second cell.
  • the sending module is specifically configured to send a CU configuration update message to the DU, where the CU configuration update message includes the first RACH configuration of the second cell.
  • the sending module is specifically configured to send the RACH configuration of the second cell and the second indication information to the DU.
  • the second indication information indicates that the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell.
  • the beneficial effects of the communication devices provided by the possible implementations of the seventh aspect and the seventh aspect may refer to the beneficial effects of the third and the third aspects, which will not be added here. Go into details.
  • an embodiment of the present application provides a communication device.
  • the communication device may include: a receiving module and a storage module.
  • the communication device may further include: a processing module.
  • the receiving module is used to receive the first RACH configuration of the second cell from the centralized unit CU.
  • the first RACH configuration of the second cell is based on the timing of the first cell
  • the first cell is a cell under the DU
  • the second cell is an adjacent cell of the first cell.
  • Both CU and DU belong to the first access network device.
  • the storage module is used to save the first RACH configuration of the second cell.
  • the processing module is configured to determine the RACH configuration of the first cell and the first cell of the second cell according to the first RACH configuration of the second cell and the RACH configuration of the first cell. Whether the RACH configuration conflicts. In this implementation manner, the processing module is further configured to reset the RACH configuration for the first cell when the RACH configuration of the first cell conflicts with the first RACH configuration of the second cell.
  • the beneficial effects of the communication devices provided by the foregoing eighth aspect and each possible implementation manner of the eighth aspect may refer to the beneficial effects brought about by the foregoing fourth aspect and the fourth aspect, which are not added here. Go into details.
  • the embodiments of the present application provide a communication method, which can be applied to a second access network device, can also be applied to a CU of the second access network device, or can be applied to a chip in the CU.
  • the method will be described below by taking the application to the second access network device as an example.
  • the second access network device obtains the first RACH configuration of the second cell.
  • the first RACH configuration of the second cell is based on the timing of the first cell
  • the second cell is the cell under the second access network device
  • the first cell is the cell under the distributed unit DU
  • the second cell is the first cell. Adjacent cells of a cell, CU and DU belong to the first access network equipment.
  • the second access network device sends the first RACH configuration of the second cell to the CU.
  • the second access network device may obtain the first RACH configuration of the second cell in the following manner.
  • the second access network device obtains the timing deviation between the first cell and the second cell, and the second RACH configuration of the second cell.
  • the second RACH configuration of the second cell is based on the timing of the second cell.
  • the second access network device converts the second RACH configuration of the second cell to the first RACH configuration of the second cell according to the timing deviation between the first cell and the second cell.
  • the above-mentioned timing deviation between the first cell and the second cell refers to the timing deviation of the two cells.
  • it may include: frame number deviation and frame boundary deviation between the first cell and the second cell; or, frame number deviation, subframe number deviation, and subframe boundary deviation between the first cell and the second cell; or, the first cell and the second cell The time deviation of the two cells relative to the frame boundary of the same frame, etc.
  • the second access network device may obtain the timing deviation between the first cell and the second cell in the following two ways: the second access network device receives the timing deviation between the first cell and the second cell from the terminal device; Or, the second access network device receives the timing deviation between the first cell and the second cell from the CU.
  • the second access network device may not have a timing deviation between the first cell and the second cell.
  • the second access network device may not perform the RACH configuration conversion operation, but send the second RACH configuration of the second cell to the CU of the first access network device. Therefore, in order to enable the CU of the first access network device to accurately learn the received RACH configuration of the second cell based on which cell timing the RACH configuration, the above-mentioned second access network device sends the second cell's RACH configuration to the CU.
  • the first RACH configuration includes: the second access network device sends the RACH configuration of the second cell to the CU, and the first indication information.
  • the first indication information indicates that the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell.
  • an embodiment of the present application provides a communication device.
  • the communication device may include: a processing module and a sending module.
  • the communication device may further include: a receiving module.
  • the processing module is used to obtain the first RACH configuration of the second cell; where the first RACH configuration of the second cell is based on the timing of the first cell, the second cell is a cell under the second access network device, and the first RACH configuration is based on the timing of the first cell.
  • the cell is a cell under the distributed unit DU, the second cell is an adjacent cell of the first cell, and both CU and DU belong to the first access network device.
  • the processing module can be used to obtain the timing deviation between the first cell and the second cell, the second RACH configuration of the second cell, and according to the timing deviation between the first cell and the second cell, the second RACH of the second cell
  • the configuration is converted to the first RACH configuration of the second cell.
  • the second RACH configuration of the second cell is based on the timing of the second cell.
  • the above-mentioned timing deviation between the first cell and the second cell refers to the timing deviation of the two cells.
  • it may include: frame number deviation and frame boundary deviation between the first cell and the second cell; or, frame number deviation, subframe number deviation, and subframe boundary deviation between the first cell and the second cell; or, the first cell and the second cell The time deviation of the two cells relative to the frame boundary of the same frame, etc.
  • the processing module may obtain the first RACH configuration of the second cell by receiving the timing deviation between the first cell and the second cell from the terminal device received by the receiving module.
  • the processing module may obtain the first RACH configuration of the second cell through the timing deviation between the first cell and the second cell from the CU received by the receiving module.
  • the sending module is used to send the first RACH configuration of the second cell to the CU.
  • the sending module is specifically configured to send the RACH configuration of the second cell to the CU, and the first indication information, the first indication information indicating that the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell.
  • an embodiment of the present application provides a communication device.
  • the communication device includes a processor, a memory, and a communication port; the communication device implements reception and transmission through the communication port.
  • the memory is used to store computer executable program code, and the program code includes instructions; when the processor executes the instructions, the instructions cause the communication device to execute the method described in any one of the first aspect to the fourth aspect or the ninth aspect.
  • an embodiment of the present application provides a communication device, which includes: the CU as described in the first aspect and the DU as described in the second aspect; or, as described in the third aspect.
  • CU, and the DU described in the fourth aspect or, the communication device described in the fifth aspect, and the communication device described in the sixth aspect; or, the communication device described in the seventh aspect, and , The communication device described in the eighth aspect; or, the communication device described in the eleventh aspect.
  • the communication device may be referred to as a wireless access network device, for example.
  • the embodiments of the present application provide a communication system, which may include the CU as described in the first aspect and the DU as described in the second aspect; or, as described in the third aspect.
  • CU, and the DU described in the fourth aspect or, the communication device described in the fifth aspect, and the communication device described in the sixth aspect; or, the communication device described in the seventh aspect,
  • the communication device described in the eighth aspect or, the second access network device described in the aforementioned ninth aspect; or, the communication device described in the aforementioned tenth aspect; or, as described in the aforementioned eleventh aspect
  • the CU of the first access network device described in the third aspect, the DU of the first access network device described in the fourth aspect, and the second access network device described in the ninth aspect Network access equipment; or, the communication device described in the seventh aspect, the communication device described in the eighth aspect, and the communication device described in the tenth aspect.
  • an embodiment of the present application provides a chip with a computer program stored on the chip, and when the computer program is executed by the chip, the implementation is as described in any one of the first to fourth aspects, or the ninth aspect Methods.
  • an embodiment of the present application provides a communication device, including the communication device used to implement the above first aspect or each possible implementation manner of the first aspect, or the third aspect or each possible implementation manner of the third aspect.
  • the communication device may be a CU or a module applied to the CU, for example, may be a chip applied to the CU.
  • the embodiments of the present application provide a communication device, including the communication device used to implement the above second aspect or each possible implementation manner of the second aspect, or the fourth aspect or each possible implementation manner of the fourth aspect.
  • the communication device may be a DU or a module applied to the DU, for example, it may be a chip applied to the DU.
  • the embodiments of the present application provide a computer-readable storage medium for storing computer programs or instructions.
  • the computer programs or instructions When the computer programs or instructions are run on a computer, the computer can execute aspects such as the first to fourth aspects, or The method described in any one of the ninth aspect.
  • embodiments of the present application provide a computer program product, which when the computer program product runs on a computer, causes the computer to execute the method described in any one of the first to fourth aspects.
  • embodiments of the present application provide a computer program product containing instructions, which when run on a computer, cause the computer to execute the method described in any one of the first to fourth aspects, or the ninth aspect.
  • the DU when the cell under the DU of the access network device and the neighboring cell adopt different timings, the DU can obtain the timing configuration of the first cell and the second cell, or the second cell RACH configuration based on the timing of the first cell.
  • the DU can judge the RACH configuration of the two cells at the same timing based on the information obtained above, so that it can accurately identify whether the cell and neighboring cells are happening.
  • the RACH configuration of the cell can be optimized when a conflict occurs, so as to ensure the success rate and access delay of the random access of the terminal equipment.
  • FIG. 1 is a schematic diagram of the architecture of a mobile communication system applied in an embodiment of this application;
  • Figure 2 is a schematic diagram of the architecture of a 5G communication system
  • Figure 3 is a schematic diagram of an access network device
  • Figure 4 is a schematic diagram of a time domain resource
  • Figure 5 is another schematic diagram 1 of time domain resources
  • Figure 6 is a second schematic diagram of another time domain resource
  • Figure 7 is a third schematic diagram of another time domain resource
  • Figure 8 is another schematic diagram four of time domain resources
  • Figure 9 is another schematic diagram five of time domain resources
  • Figure 10 is a schematic diagram of a RACH time domain resource
  • Figure 11 is a schematic diagram of another RACH time domain resource
  • FIG. 12 is a schematic flowchart of a communication method provided by an embodiment of this application.
  • Figure 13 is a schematic diagram of another RACH time domain resource
  • FIG. 14 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 16 is a flowchart of another communication method provided by an embodiment of this application.
  • Figure 17 is another schematic diagram 1 of another RACH time domain resource
  • Figure 18 is another schematic diagram of another RACH time domain resource
  • FIG. 19 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 20 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 21 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 22 is a schematic flowchart of another communication method provided by an embodiment of this application.
  • FIG. 23 is a flowchart of another communication method provided by an embodiment of this application.
  • FIG. 24 is a schematic structural diagram of a communication device provided by an embodiment of this application.
  • FIG. 25 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 26 is a schematic structural diagram of yet another communication device provided by an embodiment of this application.
  • FIG. 27 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • FIG. 1 is a schematic diagram of the architecture of a mobile communication system applied in an embodiment of this application.
  • the mobile communication system may include a core network device 110, a radio access network (RAN) device 120, and at least one terminal device (the terminal device 130 and the terminal device 140 in FIG. 1).
  • the terminal device is connected to the wireless access network device 120 in a wireless manner, and the wireless access network device 120 is connected to the core network device 110 in a wireless or wired manner.
  • the core network device 110 and the radio access network device 120 can be separate and different physical devices, or the functions of the core network device 110 and the logical functions of the radio access network device 120 can be integrated on the same physical device.
  • the terminal device can be a fixed location, or it can be movable.
  • FIG. 1 is only a schematic diagram.
  • the mobile communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 1.
  • the embodiment of the present application does not limit the number of core network equipment 110, radio access network equipment 120, and terminal equipment included in the mobile communication system.
  • the radio access network device 120 is an access device for terminal devices to wirelessly access the mobile communication system. It can be a base station NodeB, an evolved node B (eNB or eNodeB), a 5G mobile communication system or a new generation A base station (such as gNB or ng-eNB) in a wireless (new radio, NR) communication system, a base station in a future mobile communication system, an access node, a relay station in a WiFi system, etc.
  • the specific technology and specific equipment form adopted by 120 are not limited.
  • the wireless access network device 120 is referred to as the access network device.
  • the access network device refers to the wireless access network device 120.
  • the terms 5G and NR may be equivalent.
  • the terminal device may also be called a terminal, a user equipment (UE), a mobile station (mobile station, MS), a mobile terminal (mobile terminal, MT), and so on.
  • Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial control (industrial control) Wireless terminals in ), wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless terminals in smart grid, and wireless terminals in transportation safety Terminals, wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the wireless access network device 120 and terminal devices can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on the water; they can also be deployed on aircraft, balloons, and satellites in the air.
  • the embodiment of the present application does not limit the application scenarios of the wireless access network device 120 and the terminal device.
  • the wireless access network device 120 and the terminal device may communicate through a licensed spectrum, or communicate through an unlicensed spectrum, or communicate through a licensed spectrum and an unlicensed spectrum at the same time.
  • the wireless access network device 120 and the terminal device can communicate through the frequency spectrum below 6 gigahertz (gigahertz, GHz), or communicate through the frequency spectrum above 6 GHz, and can also use the frequency spectrum below 6 GHz and the frequency spectrum above 6 GHz at the same time. To communicate.
  • the embodiment of the present application does not limit the spectrum resource used between the radio access network device 120 and the terminal device.
  • FIG. 2 is a schematic diagram of the architecture of a 5G communication system.
  • the 5G communication system includes a next generation-radio access network (NG-RAN) composed of multiple access network devices and a 5G core network (5G-RAN) composed of multiple core network devices. core, 5GC).
  • NG-RAN next generation-radio access network
  • 5G-RAN 5G core network
  • core 5GC
  • the access network equipment in the NG-RAN may be an access network equipment with a separate architecture of a centralized unit (CU) and a distributed unit (DU).
  • CU and DU can be understood as the division of access network equipment from the perspective of logical functions.
  • CU and DU can be physically separated or deployed together.
  • Multiple DUs can share one CU, and there can be multiple cells under one DU.
  • CU and DU can be connected through F1 interface.
  • the CU can represent the access network equipment connected to the 5GC through the NG interface, and can represent the access network equipment connected to other access network equipment through the Xn interface (for example, the Xn-C (control plane) interface).
  • the function of the CU and the function of the DU can be divided according to the protocol layer of the wireless network.
  • the functions of the radio resource control (RRC) layer, the service data adaptation protocol (SDAP) layer, and the packet data convergence protocol (PDCP) layer are set in the CU
  • the wireless link Functions such as a radio link control (RLC) layer, a media access control (MAC) layer, and a physical layer (PHY) layer are set in the DU.
  • RLC radio link control
  • MAC media access control
  • PHY physical layer
  • the CU or DU may have more protocol layer functions, or the CU or DU may also have part of the protocol layer processing functions.
  • part of the functions of the RLC layer and the functions of the protocol layer above the RLC layer may be set in the CU, and the remaining functions of the RLC layer and the functions of the protocol layer below the RLC layer may be set in the DU.
  • the function of the CU and the function of the DU may also be divided according to the type of service or other system requirements. For example, it is divided by time delay, and functions that need to meet the time delay requirement for processing time are set in the DU, and functions that do not need to meet the time delay requirement are set in the CU.
  • the CU may have one or more functions of the core network.
  • One or more CUs can be set centrally or separately.
  • the CU can be set on the network side to facilitate centralized management.
  • the DU can have multiple radio frequency functions, or the radio frequency functions can be set remotely.
  • FIG. 3 is a schematic diagram of an access network device.
  • the control plane (CP) of the CU and the user The user plane (UP) is separated, that is, the control plane of the CU (CU-CP) and the CU user plane (CU-UP).
  • CU-CP and CU-UP can be implemented by different functional entities, and CU-CP and CU-UP can be coupled with DU to jointly complete the function of access network equipment.
  • the CU-CP is responsible for the control plane function, which mainly includes the function of the RRC layer and the function of PDCP-C.
  • PDCP-C is mainly responsible for encryption and decryption of control plane data, integrity protection, and data transmission.
  • CU-UP is responsible for user plane functions, mainly including SDAP layer functions and PDCP-U.
  • PDCP-U is mainly responsible for data plane encryption and decryption, integrity protection, header compression, serial number maintenance, data transmission, etc.
  • CU-CP and CU-UP can be connected through the E1 interface.
  • CU-CP represents that the access network equipment can be connected to the core network equipment through the NG interface, and is connected to the DU through the F1-C (control plane), and the CU-UP is connected to the DU through the F1-U (user plane).
  • the function of PDCP-C is also on the CU-UP side.
  • the cells in the 5G communication system have the following two situations:
  • Case 1 The same timing (or the same timing reference) is used between the two cells, that is, the "time" of the two cells is synchronized.
  • the frame boundaries of the two cells are aligned (frame boundary alignment means that the subframe boundaries are aligned and the subframe numbers are synchronized), and the frame numbers are synchronized.
  • Case 2 The timings used between the two cells are different (or different timing references are used), that is, the "times" of the two cells are not synchronized. Including the frame boundary alignment but the frame number is not synchronized, or the frame boundary is not aligned (the frame boundary is not aligned, that is, there is a cross between the frames, so the frame number cannot be synchronized).
  • the time unit in the time domain in the 5G communication system includes frames and subframes. Among them, one frame occupies 10 milliseconds, the frame number starts from 0, and every 1024 frame number is a cycle. One frame contains 10 subframes, and each subframe occupies 1 millisecond. The following uses frames and subframes as examples to illustrate the above two cases.
  • the "time" synchronization of the two cells can be as shown in Table 1 below:
  • Figure 4 is a schematic diagram of time domain resources, taking adjacent cells A and B as examples (it should be understood that the two adjacent cells here refer to two adjacent cells, for example, the coverage of the two cells There are some areas that are the same.
  • One of the cells can be referred to as a neighboring cell (referred to as a neighboring cell) of another cell.
  • a neighboring cell referred to as a neighboring cell of another cell.
  • the two cells correspond to frame number n at the same time, and the frame boundaries of the two cells with frame number n are aligned.
  • Figure 5 is another schematic diagram of time domain resources
  • Figure 6 is another schematic diagram of time domain resources
  • Figure 7 is another schematic diagram of time domain resources
  • Figure 8 is another schematic diagram of time domain resources
  • Figure 9 Diagram 5 of another time domain resource. Still taking neighboring cell A and cell B as an example, when cell A and cell B are using different timings, if the two cells are not synchronized with the "time" shown in sequence number 1 in Table 2, then cell A and cell The frame relationship of B can be shown in Figure 5. If the two cells are out of sync with the "time” shown in sequence number 2 in Table 2, the frame relationship between cell A and cell B can be as shown in FIG. 6 or FIG. 7. If the two cells are out of sync with the "time” shown in sequence number 3 in Table 2, the frame relationship between cell A and cell B can be as shown in Figure 8 or Figure 9.
  • Table 1 and Table 2 are only an illustration.
  • the above-mentioned time relationship between two adjacent cells can be further refined, namely When two adjacent cells adopt the same timing, the numbers of the time units of the smallest granularity of the two cells are the same and the boundaries are aligned. When two adjacent cells adopt different timings, the numbers of at least one granular time unit between the two cells are different and/or the boundaries are not aligned.
  • frame number is not synchronized, subframe number is not synchronized, slot number is not synchronized, symbol number is not synchronized, frame boundary is not aligned, subframe boundary is not aligned, slot boundary is not aligned, symbol boundary is not aligned Wait.
  • Self-organized networks is a concept put forward during the long term evolution (LTE) standardization stage.
  • LTE long term evolution
  • the introduction of this technology is aimed at automatically completing the parameter configuration and optimization of cellular mobile communication network equipment, reducing network operations Manual participation in the management process improves network reliability and reduces operating costs.
  • the 5G communication system also supports the SON mechanism.
  • SON mainly includes three major functions, namely self-configuration, self-optimization, and self-healing.
  • self-optimization means that network equipment adaptively adjusts wireless parameters (such as transmit power, handover threshold, and cell personality offset, etc.) according to the operating conditions of the network to optimize the performance of the network.
  • Self-optimization mainly includes mobility load balancing (MLB), random access channel (random access channel, RACH) optimization, and mobile robustness optimization (mobility robust optimization, MRO).
  • MLB mobility load balancing
  • RACH random access channel
  • MRO mobile robustness optimization
  • the RACH configuration of the cell is mainly the physical random access channel (PRACH) configuration, which can include: PRACH preamble sequence and format-related configuration parameters, PRACH resource time-domain-related configuration parameters, PRACH resource frequency-domain-related configuration Parameters, etc.
  • PRACH physical random access channel
  • the RACH configuration can be replaced with the PRACH configuration, which is also within the protection scope of the present invention.
  • the following uses the RACH configuration as an example for description.
  • the RACH configuration of the cell will conflict with the RACH configuration of the neighboring cell of the cell, which will easily cause confusion between the random access preamble of the cell and the neighboring cell, and cause the cell to be connected to the neighboring cell.
  • the terminal equipment fails to access, or causes false alarms, and increases the signaling load of the access network equipment. Therefore, the RACH optimization in self-optimization aims to avoid conflicts with the RACH configuration of neighboring cells by adjusting the RACH configuration of the cell, so as to ensure the success rate and access delay of the terminal equipment random access to the cell.
  • the RACH configuration of a cell is determined by the DU to which the cell belongs, that is, the DU sets the RACH configuration of the cell under the DU and executes RACH. optimization.
  • the following uses an example to describe the process of DU performing RACH optimization.
  • the DU of the access network device A can determine whether there is a conflict between the RACH configurations of the two cells based on the RACH configuration of the cell 1 and the RACH configuration of the cell 2. If the RACH configuration of cell 1 conflicts with the RACH configuration of cell 2, optionally, the DU of access network device A can optimize the RACH configuration of cell 1 to ensure the success rate and access rate of random access to cell 1 by the terminal device. Entry delay. For example, the DU of the access network device A can change some or all of the RACH configuration parameters of the cell 1, so as to avoid conflicts with the RACH configuration of the cell 2.
  • the DU of access network device A can be based on the RACH configuration of cell 1 and cell 2.
  • the RACH configuration of cell 1 can accurately identify whether there is a conflict between the RACH configuration of cell 1 and the RACH configuration of cell 2.
  • the RACH configuration of cell 2 acquired by the DU of the access network device A is the RACH configuration based on cell 2 timing
  • the RACH configuration of cell 1 is the RACH configuration based on cell 1 timing.
  • the RACH configuration of cell 1 and cell 2 are the same, because the timing of cell 1 and cell 2 are different, there may not be a problem of RACH configuration conflict.
  • FIG. 10 is a schematic diagram of a RACH time domain resource.
  • the time domain configuration of the RACH resource of cell 1 is the same as the time domain configuration of the RACH resource of cell 2 as an example.
  • RACH is sent on 7 subframes. Assuming that the timing of cell 1 is different from the timing of cell 2 by 2 subframes, in this case, although the RACH configuration of cell 1 and cell 2 are the same, the timing of cell 1 and cell 2 are different, so that cell 1 is allowed
  • the subframe for transmitting the RACH and the subframe for allowing the RACH to be transmitted on the cell 2 do not overlap in time. In this case, there is no problem of RACH configuration conflict between the two cells.
  • Figure 11 is a schematic diagram of another RACH time domain resource.
  • the time domain configuration of the RACH resource of cell 1 is different from the time domain configuration of the RACH resource of cell 2 as an example.
  • cell 1 allows the terminal equipment to send RACH on the first subframe and the seventh subframe of each frame.
  • Cell 2 allows the terminal equipment to send RACH on the 0th subframe and the 4th subframe of each frame.
  • the DU cannot identify whether the RACH configuration of the cell conflicts with the RACH configuration of the neighboring cell, and thus cannot optimize the RACH configuration of the cell.
  • the embodiments of the present application provide a communication method.
  • the DU can obtain the RACH configuration of the neighboring cell based on the cell timing under the DU, so that the DU can Accurately identify whether there is a conflict between the RACH configuration of the cell under the DU and the RACH configuration of the neighboring cell.
  • the method provided in the embodiments of the present application may be applicable to any communication system with the above-mentioned problems, including but not limited to 5G communication systems.
  • the first CU and the first DU of the first access network device takes the first CU and the first DU of the first access network device as an example, and the technical solutions of the embodiments of the present application will be described in detail with reference to specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.
  • the first DU may be any DU of the first access network device.
  • the method in the embodiment of the present application may be implemented by the first CU-CP of the first access network device interacting with the first DU.
  • the following embodiments all take the first CU as an example for description.
  • FIG. 12 is a schematic flowchart of a communication method provided by an embodiment of this application.
  • This embodiment takes the RACH optimization scenario as an example to describe how the first DU of the first access network device obtains the timing deviation between the cell under the first DU and the neighboring cell.
  • the method may include:
  • the first CU obtains the timing deviation between the first cell and the second cell.
  • the first CU sends the timing deviation between the first cell and the second cell to the first DU.
  • the first DU receives the timing deviation between the first cell and the second cell.
  • the first DU saves the timing deviation between the first cell and the second cell. This step is optional.
  • the first DU may save the timing deviation between the first cell and the second cell, and delete it when the maximum storage duration is reached.
  • the first DU may delete the previously saved timing deviation between the first cell and the second cell when receiving the latest timing deviation between the first cell and the second cell sent by the first CU.
  • the first DU may be deleted after performing corresponding operations (for example, RACH configuration or RACH optimization, etc.) based on the timing deviation between the first cell and the second cell.
  • the first cell involved in this embodiment is a cell under the first DU
  • the second cell is a neighboring cell of the first cell
  • the second cell includes at least one cell.
  • the second cell mentioned here may be a cell under the first DU, a cell under other DUs of the first access network device, or a cell under the second access network device.
  • the second access network device includes a second CU and a second DU, where the second cell is a cell under the second DU.
  • the second access network device is one or more access network devices that are different from the first access network device.
  • the aforementioned timing deviation between the first cell and the second cell refers to the timing deviation between the two cells.
  • the timing deviation between the first cell and the second cell may be the system frame number and frame timing difference (SFTD) of the first cell and the second cell, or the difference between the first cell and the second cell
  • the system frame number and subframe timing difference (SSTD) of the second cell may also be the timing deviation of other time units, etc., which are specifically related to the granularity of the time unit division.
  • the timing deviation of the two cells may also be the system frame number and time slot timing deviation of the first cell and the second cell.
  • the timing deviation between the first cell and the second cell can be described as: at the same moment, the frame number deviation and frame number of the first cell and the second cell Boundary deviation; or, at the same time, the frame number deviation, subframe number deviation, and subframe boundary deviation of the first cell and the second cell; or, at the same time, the frame boundary of the first cell and the second cell relative to the same frame ⁇ time deviation.
  • Fig. 13 is a schematic diagram of another RACH time domain resource. As shown in Figure 13, assume that the first cell is at the start position of the 0th subframe of the nth frame at time x, and the second cell is at the 4th symbol of the 2nd subframe of the n-2th frame at time x . Then the timing deviation between the first cell and the second cell may be as shown in Table 3 below:
  • Table 3 is only an illustration, and the expression form of the timing deviation between the first cell and the second cell includes but is not limited to the manner shown in Table 3 above.
  • the granularity of the time unit is divided into finer granularity (for example, symbols, time slots, etc.)
  • the timing deviation between the first cell and the second cell can be expressed in other forms, which is not limited in the embodiment of the present application.
  • the first CU does not limit the manner in which the first CU obtains the timing deviation between the first cell and the second cell.
  • the first CU receives the timing deviation between the first cell and the second cell from the terminal device.
  • the terminal device may be a terminal device located in the coverage area of the first cell and the second cell at the same time.
  • the first CU may deliver a measurement configuration to the terminal device to instruct the terminal device to measure the timing deviation between the first cell and the second cell.
  • the terminal device that obtains the timing deviation through measurement can send the timing deviation to the first CU through a measurement report.
  • the method of obtaining the timing deviation between the first cell and the second cell may be applicable to the second cell, which may be a cell under the first DU, or may be a cell under other DUs of the first access network device, or This is the scenario of the cell under the second access network device.
  • the first CU may obtain the timing deviation between the first cell and the second cell based on internal implementation.
  • the first CU may monitor the broadcast signal of the second cell, and obtain the timing deviation between the first cell and the second cell based on the monitored time difference between the broadcast signal of the first cell and the broadcast signal of the second cell.
  • the first CU may receive the timing deviation between the first cell and the second cell from the second access network device.
  • the second access network device includes a second CU and a second DU, and the second cell is a cell under the second DU.
  • the first CU may receive the timing deviation between the first cell and the second cell sent from the second CU.
  • the second access network device may obtain the timing deviation between the first cell and the second cell measured by the terminal device by sending the measurement configuration to the terminal device.
  • the second access network device may obtain the timing deviation between the first cell and the second cell based on its own internal implementation, which is not limited in this embodiment.
  • the second access network device may send the timing offset to the first CU when acquiring the timing offset, or may exchange the RACH configuration with the first CU, and the timing offset may follow the RACH of the second cell. The configuration is sent together to the first CU, etc.
  • the first CU may send the timing deviation between the first cell and the second cell to the first DU in the following manner, for example:
  • the first CU may send the timing deviation between the first cell and the second cell to the first DU during the F1 interface establishment process with the first DU.
  • FIG. 14 is a schematic flowchart of another communication method provided by an embodiment of this application. As shown in FIG. 14, the foregoing step S802 may include:
  • the first DU sends an F1 establishment request message to the first CU.
  • the first CU receives the F1 setup request message (F1 setup request).
  • the first CU sends an F1 setup response message to the first DU, where the F1 setup response message includes the timing deviation between the first cell and the second cell.
  • the first DU receives the F1 setup response message (F1setup response).
  • the F1 establishment response message may also include the RACH configuration of the second cell.
  • the F1 establishment response message may also include the timing deviation of some or all of the cells under the first DU and their respective neighboring cells acquired by the first CU. That is, the timing deviation between each cell of the multiple cells under the first DU acquired by the first CU and at least one neighboring cell of the cell.
  • the F1 establishment response message may also include the RACH configuration of the neighboring cells of these cells.
  • the F1 establishment response message may include the following timing deviations: the timing deviation between cell 1 and cell 4, the timing deviation between cell 1 and cell 5, the timing deviation between cell 1 and cell 6, the timing deviation between cell 2 and cell 7, and the timing deviation between cell 2 and cell 7.
  • the first CU can actively send the timing deviation between the first cell and the second cell to the A DU, for example, is sent to the first DU through a CU configuration update message, or a newly introduced message is sent to the first DU through this newly introduced message.
  • FIG. 15 is a schematic flowchart of another communication method provided by an embodiment of this application. As shown in FIG. 15, the foregoing step S802 may include:
  • the first CU sends a CU configuration update message to the first DU, where the CU configuration update message includes the timing deviation between the first cell and the second cell.
  • the first DU receives the CU configuration update message.
  • the first CU may send the timing deviation between the first cell and the second cell to the first DU through a CU configuration update message.
  • the CU configuration update message may also include the updated RACH configuration of the second cell.
  • Implementation manner 3 The first DU actively requests to obtain the timing deviation between the first cell and the second cell.
  • FIG. 16 is a flowchart of another communication method provided by an embodiment of this application. As shown in FIG. 16, the foregoing step S802 may include:
  • the first DU sends a request message to the first CU, requesting to obtain the timing deviation between the first cell and the second cell, or requesting to obtain the random access channel RACH configuration of the second cell.
  • the first CU receives the request message.
  • the first DU may send the request message to the first CU when it is considered that a RACH configuration conflict may potentially occur in the first cell.
  • the first DU may send the request message to the first CU based on the number of times each terminal device performs random access in the RACH report reported by the terminal device, and when it is considered that a potential RACH configuration conflict occurs in the first cell.
  • the request message may be, for example, a RACH configuration potential conflict message, or a RACH configuration request message, or a timing deviation request message.
  • the embodiment of the present application does not limit the name of the request message.
  • the request message may be a dedicated request message.
  • the first CU based on the request message, the first CU sends to the first DU the timing deviation between the first cell and the second cell.
  • the request message may carry the identifier of the first cell, so as to indicate the first CU to send the timing deviation between which cell and the neighboring cell through the identifier of the first cell.
  • the identity of the cell mentioned here may include, for example, the ID of the cell and/or cell frequency point information.
  • the first cell when the request message carries the identity of the first cell, in some embodiments, the first cell may also be regarded as a cell where a RACH configuration conflict may occur, or a RACH configuration conflict may occur. Residential area and so on.
  • the RACH configuration of the second cell may also be included.
  • the first CU may send to the first DU the information of at least one cell in the first DU and its respective neighboring cells obtained by the first CU. Timing deviation. That is, the timing deviation between each of the multiple cells under the first DU and the neighboring cell (one or more) of the cell.
  • Timing deviation That is, the timing deviation between each of the multiple cells under the first DU and the neighboring cell (one or more) of the cell.
  • the first CU sends to the first DU the timing deviation of at least one cell under the first DU and its respective neighboring cells based on the request message of the first DU, it may also include There is the RACH configuration of the neighboring cells of the cell.
  • the first CU may send the following timing offset information to the first DU: cell 1 and cell 4 The timing deviation between cell 1 and cell 5, the timing deviation between cell 1 and cell 6. If the request message sent by the first DU to the first CU does not carry any cell identity, the first CU can send the following timing deviation to the first DU: the timing deviation between cell 1 and cell 4, and the timing deviation between cell 1 and cell 5. Timing deviation, timing deviation between cell 1 and cell 6, timing deviation between cell 2 and cell 7, and timing deviation between cell 2 and cell 8.
  • the first DU may consider that there is no timing deviation between the first cell and the second cell, in other words, the first cell and the second cell Use the same timing.
  • the above three implementation manners only exemplarily describe how the first CU sends the timing deviation between the first cell and the second cell and the RACH configuration of the second cell to the first DU.
  • the timing deviation between the first cell and the second cell and the RACH configuration of the second cell can also be transferred to the first DU through different messages in the above three implementation manners.
  • the first CU sends the timing deviation between the first cell and the second cell to the first DU through an F1 establishment response message, and sends the RACH configuration of the second cell to the first DU through a CU configuration update message.
  • the RACH configuration of the second cell involved in the foregoing embodiment may be acquired in the following manner, for example:
  • the first CU may obtain the RACH configuration of the second cell from the other DU and send it to the first DU.
  • the first CU may receive the RACH configuration of the second cell from the second access network device.
  • the first CU of the first access network device may send an Xn establishment request message to the second access network device.
  • the Xn establishment request message may carry the RACH configuration of the cells of all DUs under the first access network device.
  • the second access network device sends an Xn establishment response message to the first access network device.
  • the Xn establishment response message may carry the RACH configuration of the cell under the second access network device.
  • the second access network device sends an Xn establishment request message to the first CU of the first access network device.
  • the Xn establishment request message may carry the RACH configuration of the cell under the second access network device.
  • the first CU of the first access network device sends an Xn establishment response message to the second access network device.
  • the Xn establishment response message may carry the RACH configuration of the cells of all DUs under the first access network device.
  • the second access network device can pass the NG-RAN node
  • the configuration update message transfers the RACH configuration of these cells to the first CU of the first access network device.
  • the foregoing process is implemented by interaction between the CU of the second access network device and the first CU of the first access network device.
  • the acquired RACH configuration of the second cell above are all RACH configurations based on the timing of the second cell.
  • the first DU After the first DU obtains the timing deviation between the first cell and the second cell, and the RACH configuration of the second cell, the first DU can be based on the timing deviation between the first cell and the second cell, and the RACH configuration of the second cell, And, the RACH configuration of the first cell determines whether the RACH configuration of the first cell conflicts with the RACH configuration of the second cell.
  • the RACH configuration of the first cell since the RACH configuration of the first cell is the RACH configuration based on the timing of the first cell, the RACH configuration of the second cell is the RACH configuration based on the timing of the second cell. Therefore, the first DU can switch the RACH configuration of one cell based on the timing deviation between the first cell and the second cell to obtain the RACH configuration of the two cells based on the same timing.
  • FIG. 17 is a schematic diagram 1 of another RACH time domain resource
  • FIG. 18 is a schematic diagram 2 of another RACH time domain resource. It is assumed that the RACH configuration of the first cell based on the timing of the first cell, and the RACH configuration of the second cell based on the timing of the second cell is as shown in FIG. 17. Among them, the subframes filled with diagonal lines are the subframes in which the RACH is allowed to be sent on the cell.
  • the first DU can shift the frame of the second cell according to the timing deviation between the first cell and the second cell, so as to obtain the RACH configuration of the second cell based on the timing of the first cell as shown in FIG. 18, for example.
  • the RACH configuration of the first cell and the second cell are both based on the timing of the first cell.
  • the first DU may shift the frame of the first cell according to the timing deviation between the first cell and the second cell to obtain the RACH configuration of the first cell based on the timing of the second cell (not shown in the figure).
  • the RACH configuration of the first cell and the second cell are both based on the timing of the second cell.
  • the first cell allows the terminal device to transmit RACH on the first subframe and the seventh subframe of each frame.
  • the second cell allows the terminal device to send RACH on the second and sixth subframes of each frame as an example. After the above frame shifting, it can be concluded that the subframes allowed to send RACH on the first cell overlap with the subframes allowed to send RACH on the second cell (partially or completely overlapped). Therefore, the first DU determines The RACH configurations of the two cells conflict.
  • the first DU can reset (configure) the RACH configuration for the first cell to avoid conflicts with the RACH configuration of the second cell, thereby ensuring the success rate of the terminal device randomly accessing the first cell and Access delay, and the success rate and access delay of random access to the second cell.
  • the first DU may change part or all of the RACH configuration parameters of the first cell, so as to avoid conflicts with the RACH configuration of the second cell.
  • the first DU may not do any processing.
  • the first DU may re-establish the configuration for the second cell when determining that the configuration of the first cell conflicts with the second cell.
  • the first DU can send indication information to the DU through the first CU to indicate that the configuration of the first cell conflicts with the second cell, so that the DU According to the instruction information, the RACH configuration is reset (configured) for the second cell to avoid conflicts with the RACH configuration of the first cell.
  • the first DU can send the instruction information to the second access network device through the first CU, so that the second access network device is The second cell resets (configures) the RACH configuration to avoid conflicts with the RACH configuration of the first cell.
  • the second access network device includes a second CU and a second DU, where the second cell is a cell under the second DU.
  • the second CU may receive the indication information sent by the first CU and forward it to the second DU, and the second DU will reset (configure) the RACH configuration for the second cell according to the indication information.
  • the CU of the access network device can send the DU the timing deviation between the cell under the DU and its neighboring cell, thereby Based on the timing deviation, the DU can accurately identify whether the cell has a RACH configuration conflict with the neighboring cell, and then optimize the RACH configuration of the cell when a conflict occurs, thereby ensuring the success rate of random access by the terminal device And access delay.
  • the above method can be used not only in the scenario of optimizing the RACH of the cell, but also in the scenario of configuring the RACH for the cell, so that when the cell is initially configured for the RACH, it can avoid conflicts with the RACH configuration of the neighboring cell. problem.
  • the foregoing embodiment describes that the first CU sends the timing deviation between the first cell and the second cell to the first DU, and the first DU uses the timing deviation based on the timing deviation, and the RACH configuration of the first cell (based on the first cell’s Timing), and the RACH configuration of the second cell (based on the timing of the second cell) to determine whether the RACH configurations of the two cells conflict. That is, the first DU converts the RACH configuration of one of the cells based on the timing deviation, so as to judge whether the RACH configurations of the two cells conflict at the same timing.
  • the first CU sends the first RACH configuration of the second cell (that is, the RACH configuration based on the timing of the first cell) to the first DU, and the first DU uses the RACH configuration of the first cell. (That is, the RACH configuration based on the timing of the first cell) and the first RACH configuration of the second cell to determine whether the RACH configurations of the two cells conflict.
  • the first DU does not need to process the RACH configuration of the second cell. specifically:
  • FIG. 19 is a schematic flowchart of another communication method provided by an embodiment of this application. As shown in Figure 19, the method may include:
  • the first CU obtains the first RACH configuration of the second cell.
  • the first RACH configuration of the second cell is based on the timing of the first cell.
  • the first CU sends the first RACH configuration of the second cell to the first DU.
  • the first DU receives the first RACH configuration of the second cell.
  • the first DU saves the first RACH configuration of the second cell.
  • This step is optional.
  • the first DU may save the first RACH configuration of the second cell, and delete it when the maximum storage duration is reached.
  • the first DU may delete the previously saved first RACH configuration of the second cell when receiving the first RACH configuration of the second cell newly sent by the first CU.
  • the first DU may be deleted after performing corresponding operations (for example, RACH configuration or RACH optimization, etc.) based on the first RACH configuration of the second cell.
  • the above-mentioned first CU may obtain the first RACH configuration of the second cell in the following manner. E.g:
  • the first CU After obtaining the second RACH configuration (RACH configuration based on the timing of the second cell) of the second cell, the first CU converts it to the first RACH configuration of the second cell.
  • the second cell may be a cell under the first DU, a cell of another DU under the first access network device, or a second cell under the second access network device.
  • FIG. 20 is a schematic flowchart of another communication method provided by an embodiment of this application. As shown in Figure 20, the foregoing S1401 may include:
  • the first CU obtains the timing deviation between the first cell and the second cell, and the second RACH configuration of the second cell.
  • the first CU converts the second RACH configuration of the second cell to the first RACH configuration of the second cell according to the timing deviation between the first cell and the second cell.
  • the first DU has two cells, namely cell 3 and cell 4, where the neighboring cells of cell 3 and cell 4 are: cell 1, cell 2.
  • the first CU can perform the following operations:
  • the RACH configuration of the cell 2 based on the cell 4 timing is generated.
  • the neighboring cell relationship is at the cell level, not at the base station level.
  • the second access network device is adjacent to the first access network device, and the above-mentioned cell 1 and cell 2 belong to the cells under the second access network device.
  • cell 1 is not the neighboring cell of cell 3
  • only cell 2 is the neighboring cell of cell 3
  • the first CU does not need to generate the RACH configuration of cell 1 based on the timing of cell 3, but also needs to send to the first DU Cell 1 is based on the RACH configuration of cell 3 timing. That is, the first CU only performs the above-mentioned RACH configuration conversion operation on cells with actual adjacency.
  • the first CU may not have available timing offsets between the first cell and these cells (that is, the first CU does not have the first cell and these cells). The timing deviation of the cell, or the first CU did not obtain the timing deviation between the first cell and these cells). In this scenario, the first CU may not perform the RACH configuration conversion operation of these cells. In other embodiments, if the timing deviation between the first cell and the second cell acquired by the first CU is 0, it means that the first cell and the second cell are "time" synchronized, for example, the first cell and the second cell The frame numbers are synchronized, and the frame boundaries are aligned. In this scenario, the first CU does not need to perform the RACH configuration conversion operation of the second cell, and directly uses the second RACH configuration of the second cell as the first RACH configuration of the second cell.
  • Manner B For the second cell under the second access network device, the first CU may receive the first RACH configuration of the second cell from the second access network device.
  • the second access network device may set the second cell to the timing deviation between the first cell and the second cell.
  • the second RACH configuration (that is, the RACH configuration based on the timing of the second cell) is converted to the first RACH configuration of the second cell.
  • the second access network device may not have the available timing deviation between the first cell and the second cell (that is, the second access network device does not have the timing deviation between the first cell and the second cell, Or, the second access network device does not obtain the timing deviation between the first cell and the second cell)).
  • the second access network device may not perform the RACH configuration conversion operation, but send the second RACH configuration of the second cell to the first CU.
  • the timing deviation between the first cell and the second cell acquired by the second access network device is 0, it means that the first cell is synchronized with the second cell in "time", for example, the first cell is synchronized with the second cell.
  • the frame numbers of the second cell are synchronized, and the frame boundaries are aligned.
  • the second access network device does not need to perform the RACH configuration conversion operation of the second cell, and directly uses the second RACH configuration of the second cell as the first RACH configuration of the second cell.
  • the second access network device when the second access network device sends the RACH configuration of the second cell to the first CU, it may also carry first indication information, and the first indication information is used for the first access.
  • the network equipment determines whether the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell. In this way, after the first CU receives the RACH configuration of the second cell sent by the second access network device, it can learn whether the RACH configuration of the second cell is based on the timing of the first cell based on the first indication information. .
  • the first indication information can be realized by a 1-bit field.
  • the field takes a value of 1, it means that the RACH configuration of the second cell is the RACH configuration based on the timing of the second cell.
  • the value is 0, it indicates that the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell.
  • the field value is 0, it means that the RACH configuration of the second cell is based on the timing of the second cell.
  • the field value is 1, it means that the RACH configuration of the second cell is based on RACH configuration for the first cell timing.
  • the RACH configuration of the second cell when the RACH configuration of the second cell is sent, it can be realized by whether the first indication information is carried. For example, when the first indication information is carried, it means that the RACH configuration of the second cell is based on the second cell timing. When the first indication information is not carried, it indicates that the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell. Or, when the first indication information is carried, it means that the RACH configuration of the second cell is based on the timing of the first cell. When the first indication information is not carried, it means that the RACH configuration of the second cell is based on the first cell. RACH configuration for cell timing.
  • the first indication information may also use other methods to indicate whether the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell.
  • the foregoing process is implemented by interaction between the CU of the second access network device and the first CU of the first access network device.
  • method B includes but is not limited to a scenario where the first access network device is a CU/DU architecture, and is also applicable to a scenario where the first access network device is a CU/DU architecture.
  • the first CU may send the first RACH configuration of the second cell to the first DU in the following manner, for example:
  • the first CU may send the first RACH configuration of the second cell to the first DU when establishing an F1 interface with the first DU.
  • FIG. 21 is a schematic flowchart of another communication method provided by an embodiment of this application. As shown in FIG. 21, the foregoing step S1402 may include:
  • the first DU sends an F1 establishment request message to the first CU.
  • the first CU receives the F1 setup request message (F1 setup request).
  • the first CU sends an F1 setup response message to the first DU, where the F1 setup response message includes the first RACH configuration of the second cell.
  • the first DU receives the F1 setup response message (F1setup response).
  • the F1 establishment response message may also include the RACH configuration of some or all of the neighboring cells under the first DU acquired by the first CU based on the timing of the cell. That is, at least one neighboring cell of each of the multiple cells under the first DU acquired by the first CU is based on the timing RACH configuration of the cell.
  • the first CU may send the first RACH configuration of the second cell to the first DU when performing a CU configuration update with the first DU.
  • FIG. 22 is a schematic flowchart of another communication method provided by an embodiment of this application. As shown in FIG. 22, the foregoing step S1402 may include:
  • the first CU sends a CU configuration update message to the first DU, where the CU configuration update message includes the first RACH configuration of the second cell.
  • the first DU receives the CU configuration update message.
  • Implementation manner 3 The first DU actively requests to obtain the first RACH configuration of the second cell.
  • FIG. 23 is a flowchart of another communication method provided by an embodiment of this application. As shown in FIG. 23, the foregoing step S1402 may include:
  • the first DU sends a request message to the first CU, requesting to obtain the random access channel RACH configuration of the second cell.
  • the first CU receives the request message.
  • the first DU may send the request message to the first CU when it is considered that a RACH configuration conflict may potentially occur in the first cell.
  • the first DU may send the request message to the first CU based on the number of times each terminal device performs random access in the RACH report reported by the terminal device, and when it is considered that a potential RACH configuration conflict occurs in the first cell.
  • the request message may be, for example, a RACH configuration potential conflict message, or a RACH configuration request message.
  • the embodiment of the present application does not limit the name of the request message.
  • the request message may be a dedicated request message.
  • the first CU sends the first RACH configuration of the second cell to the first DU.
  • the request message may carry the identity of the first cell, so as to indicate through the identity of the first cell, the first CU sends the neighboring cell of which cell is based on the RACH configuration of the cell timing.
  • the identity of the cell mentioned here may be, for example, the ID of the cell and/or cell frequency point information.
  • the first cell when the request message carries the identity of the first cell, in some embodiments, the first cell may also be regarded as a cell where a RACH configuration conflict may occur, or a RACH configuration conflict may occur. Residential area and so on.
  • the first CU can send to the first DU the neighboring cells of the cells in the first DU acquired by the first CU based on the cell timing RACH configuration. That is, at least one neighboring cell of each of the multiple cells under the first DU acquired by the first CU is based on the timing RACH configuration of the cell.
  • the RACH configuration of some second cells acquired by the first CU is not the RACH configuration based on the timing of the first cell (for details, please refer to the aforementioned methods A and B for the first (Description of the RACH configuration of the second cell obtained when the timing deviation between the cell and the second cell).
  • the first CU may not send the RACH configuration of the second cell that is not based on the timing of the first cell to the first DU, that is, only send the RACH configuration of the second cell based on the timing of the first cell.
  • the first CU sends the RACH configuration of the second cell to the first DU, it may also carry second indication information.
  • the first DU determines whether the RACH configuration of the second cell is based on the first cell. Timed RACH configuration. In this way, after the first DU receives the RACH configuration of the second cell sent by the first CU, it can learn whether the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell based on the second indication information.
  • the second indication information may be obtained based on the first indication information.
  • the first indication information may be transparently transmitted to the first DU as the second indication information, or the first indication information may be processed as the second indication information.
  • the instruction information is sent to the first DU.
  • the second indication information may be indication information generated by the first CU according to whether the RACH of the second cell is the RACH configuration based on the timing of the first cell.
  • the second indication information can be realized by a 1-bit word field.
  • the word field takes a value of 1, it means that the RACH configuration of the second cell is the RACH configuration based on the timing of the second cell.
  • the value is 0, it indicates that the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell.
  • the field value is 0, it means that the RACH configuration of the second cell is based on the timing of the second cell.
  • the field value is 1, it means that the RACH configuration of the second cell is based on RACH configuration for the first cell timing.
  • the RACH configuration of the second cell when the RACH configuration of the second cell is sent, it can be realized by whether the second indication information is carried. For example, when the second indication information is carried, it means that the RACH configuration of the second cell is based on the second cell timing. When the second indication information is not carried, it means that the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell. Or, when the second indication information is carried, it means that the RACH configuration of the second cell is based on the timing of the first cell. When the second indication information is not carried, it means that the RACH configuration of the second cell is based on the first cell. RACH configuration for cell timing.
  • the second indication information may also use other methods to indicate whether the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell.
  • the message sent by the first CU to the first DU may, for example, carry the second indication information to indicate whether the RACH configuration of the second cell carried in the message is RACH configuration based on the timing of the first cell.
  • the first DU can be based on the first RACH configuration of the second cell (that is, the RACH configuration based on the timing of the first cell), and the first The RACH configuration of the cell (that is, the RACH configuration based on the timing of the first cell) determines whether the RACH configuration of the first cell conflicts with the first RACH configuration of the second cell.
  • the first DU can accurately identify whether the RACH configurations of the two cells conflict.
  • the first DU can be reset (configured) for the first cell
  • the RACH configuration is used to avoid conflicts with the RACH configuration of the second cell, thereby ensuring the success rate and access delay of the terminal device randomly accessing the first cell, as well as the success rate and access delay of the random accessing to the second cell. If there is no conflict (for example, the subframes allowed to send RACH on the first cell and the subframes allowed to send RACH on the second cell do not overlap in time), the first DU may not do any processing.
  • the first DU may re-establish the configuration for the second cell when determining that the configuration of the first cell conflicts with the second cell.
  • the first DU can send indication information to the DU through the first CU to indicate that the configuration of the first cell conflicts with the second cell, so that the DU According to the instruction information, the RACH configuration is reset (configured) for the second cell to avoid conflicts with the RACH configuration of the first cell.
  • the first DU can send the instruction information to the second access network device through the first CU, so that the second access network device is The second cell resets (configures) the RACH configuration to avoid conflicts with the RACH configuration of the first cell.
  • the second access network device includes a second CU and a second DU, where the second cell is a cell under the second DU.
  • the second CU may receive the indication information sent by the first CU and forward it to the second DU, and the second DU will reset (configure) the RACH configuration for the second cell according to the indication information.
  • the CU of the access network device can send to the DU the RACH configuration of the neighboring cell of the cell under the DU based on the cell timing.
  • the DU can accurately identify whether the RACH configuration conflict between the cell and the neighboring cell occurs based on the RACH configuration of the two cells at the same timing, and then optimize the RACH configuration of the cell when a conflict occurs. So as to ensure the success rate and access delay of the random access of the terminal equipment.
  • the above method can be used not only in the scenario of optimizing the RACH of the cell, but also in the scenario of configuring the RACH for the cell, so that when the cell is initially configured for the RACH, it can avoid conflicts with the RACH configuration of the neighboring cell. problem.
  • the operations or steps implemented by the CU can also be implemented by components (such as chips or circuits) that can be configured in the CU, and the operations or steps implemented by the DU can also be configured by
  • the components (such as chips or circuits) in the DU are implemented, and the operations or steps implemented by the access network equipment can also be implemented by components (such as chips or circuits) that can be configured in the access network equipment.
  • FIG. 24 is a schematic structural diagram of a communication device provided by an embodiment of this application. It can be understood that the communication device can correspondingly implement the operations or steps corresponding to the first CU in the foregoing method embodiments.
  • the communication device may be a CU or may be a component configurable in the CU. As shown in FIG. 24, the communication device may include: a processing module 11 and a sending module 12. Optionally, in some embodiments, the communication device may further include: a first receiving module 13 and/or a second receiving module 14.
  • the processing module 11 is configured to obtain the timing deviation between the first cell and the second cell.
  • the first cell is a cell under the DU
  • the second cell is an adjacent cell of the first cell.
  • Both the CU and the DU belong to the first access network device.
  • the above-mentioned timing deviation between the first cell and the second cell refers to the timing deviation of the two cells.
  • it may include: frame number deviation and frame boundary deviation between the first cell and the second cell; or, frame number deviation, subframe number deviation, and subframe boundary deviation between the first cell and the second cell; or, the first cell and the second cell The time deviation of the two cells relative to the frame boundary of the same frame, etc.
  • the processing module 11 is specifically configured to obtain the timing deviation between the first cell and the second cell through the timing deviation between the first cell and the second cell received from the terminal device by the second receiving module 14.
  • the processing module 11 and the second receiving module 14 may also be integrated into the processing module 11 or the second receiving module 14.
  • the processing module 11 is specifically configured to receive the timing of the first cell and the second cell from the second access network device through the second receiving module 14 Deviation to obtain the timing deviation between the first cell and the second cell.
  • the processing module 11 and the second receiving module 14 may also be integrated into the processing module 11 or the second receiving module 14.
  • the sending module 12 is configured to send the timing deviation between the first cell and the second cell to the DU.
  • the first receiving module 13 is configured to receive a request message from the DU.
  • the request message requests to obtain the timing deviation between the first cell and the second cell, or requests to obtain the random access channel RACH configuration of the second cell.
  • the sending module 12 is specifically configured to send the timing deviation between the first cell and the second cell to the DU based on the request message.
  • the request message carries the identity of the first cell.
  • the first receiving module 13 is configured to receive the F1 establishment request message from the DU.
  • the sending module 12 is specifically used to send an F1 establishment response message to the DU, and the F1 establishment response message includes the timing deviation between the first cell and the second cell; or the sending module 12 is specifically used to send a CU configuration update message to the DU , The CU configuration update message includes the timing deviation between the first cell and the second cell.
  • the communication device can perform the actions of the first CU in the method embodiment corresponding to FIG. 12, and its implementation principles and technical effects are similar, and will not be repeated here.
  • the above-mentioned first CU may further include at least one storage module, and the storage module may include data and/or instructions, a processing module and/or a transceiver module (or a first receiving module, a second receiving module, and a sending module)
  • the data and/or instructions in the storage module can be read to implement the corresponding method.
  • the processing module 11 is configured to obtain the first RACH configuration of the second cell.
  • the first RACH configuration of the second cell is based on the timing of the first cell.
  • the first cell is a cell under the distributed unit DU
  • the second cell is an adjacent cell of the first cell
  • both CU and DU belong to the first access network device.
  • the processing module 11 can be used to obtain the timing deviation between the first cell and the second cell, the second RACH configuration of the second cell, and according to the timing deviation between the first cell and the second cell, the second cell
  • the RACH configuration is converted to the first RACH configuration of the second cell.
  • the second RACH configuration of the second cell is based on the timing of the second cell.
  • the above-mentioned timing deviation between the first cell and the second cell refers to the timing deviation of the two cells.
  • it may include: frame number deviation and frame boundary deviation between the first cell and the second cell; or, frame number deviation, subframe number deviation, and subframe boundary deviation between the first cell and the second cell; or, the first cell and the second cell The time deviation of the two cells relative to the frame boundary of the same frame, etc.
  • the processing module 11 may obtain the timing deviation between the first cell and the second cell through the timing deviation between the first cell and the second cell received from the terminal device by the first receiving module 13. At this time, the processing module 11 and the first receiving module 13 may also be integrated into the processing module 11 or the first receiving module 13.
  • the processing module 11 may determine the timing deviation between the first cell and the second cell from the second access network device received by the first receiving module 13 Acquire the timing deviation between the first cell and the second cell. At this time, the processing module 11 and the first receiving module 13 may also be integrated into the processing module 11 or the first receiving module 13.
  • the processing module 11 may receive the first RACH configuration of the second cell from the second access network device through the first receiving module 13.
  • the processing module 11 may receive the RACH configuration of the second cell from the second access network device through the first receiving module 13, and the first indication information, the first indication information indicates the second cell
  • the RACH configuration is the RACH configuration based on the timing of the first cell.
  • the sending module 12 is configured to send the first RACH configuration of the second cell to the DU.
  • the second receiving module 14 is configured to receive a request message from the DU, the request message requesting to obtain the RACH configuration of the second cell.
  • the sending module 12 is specifically configured to send the first RACH configuration of the second cell to the DU based on the request message.
  • the request message carries the identity of the first cell.
  • the second receiving module 14 is configured to receive the F1 establishment request message from the DU.
  • the sending module 12 is specifically configured to send an F1 setup response message to the DU, and the F1 setup response message includes the first RACH configuration of the second cell.
  • the sending module 12 is specifically configured to send a CU configuration update message to the DU, where the CU configuration update message includes the first RACH configuration of the second cell.
  • the sending module 12 is specifically configured to send the RACH configuration of the second cell and the second indication information to the DU.
  • the second indication information indicates that the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell.
  • the above-mentioned first receiving module, second receiving module, and sending module may be integrated in the transceiver module, or may be separated.
  • the communication device provided in this embodiment can perform the actions of the first CU in the method embodiment corresponding to FIG. 19, and its implementation principles and technical effects are similar, and will not be repeated here.
  • the above-mentioned first CU may further include at least one storage module, and the storage module may include data and/or instructions, a processing module and/or a transceiver module (or a first receiving module, a second receiving module, and a sending module)
  • the data and/or instructions in the storage module can be read to implement the corresponding method.
  • FIG. 25 is a schematic structural diagram of another communication device provided by an embodiment of this application. It is understandable that the communication device can correspondingly implement the operations or steps corresponding to the first DU in the foregoing method embodiments.
  • the communication device may be a DU or may be a component configurable in the DU. As shown in FIG. 25, the communication device may include: a receiving module 21 and a storage module 22. Optionally, in some embodiments, the communication device may further include: a processing module 23.
  • the receiving module 21 is configured to receive the timing deviation between the first cell and the second cell from the centralized unit CU.
  • the first cell is a cell under the DU
  • the second cell is an adjacent cell of the first cell
  • both the CU and the DU belong to the first access network device.
  • the storage module 22 is used to store the timing deviation between the first cell and the second cell.
  • the receiving module 21 is further configured to receive the random access channel RACH configuration of the second cell from the CU.
  • the processing module 23 is configured to determine the RACH configuration of the first cell and the RACH of the second cell according to the timing deviation between the first cell and the second cell, the RACH configuration of the second cell, and the RACH configuration of the first cell. Whether the configuration conflicts. In this implementation manner, the processing module 23 may also be used to reset the RACH configuration for the first cell when the RACH configuration of the first cell conflicts with the RACH configuration of the second cell.
  • the communication device provided in this embodiment can perform the actions of the first DU in the method embodiment corresponding to FIG. 12, and its implementation principles and technical effects are similar, and will not be repeated here.
  • the above-mentioned first DU may further include at least one storage module, which may include data and/or instructions, and the processing module and/or the transceiver module (or the receiving module) may read the data and/or the data in the storage module. Or instructions to implement the corresponding method.
  • the receiving module 21 is configured to receive the first RACH configuration of the second cell from the centralized unit CU.
  • the first RACH configuration of the second cell is based on the timing of the first cell
  • the first cell is a cell under the DU
  • the second cell is an adjacent cell of the first cell.
  • Both CU and DU belong to the first access network device.
  • the storage module 22 is configured to save the first RACH configuration of the second cell.
  • the processing module 23 is configured to determine the RACH configuration of the first cell and the second cell's RACH configuration according to the first RACH configuration of the second cell and the RACH configuration of the first cell. 1. Whether the RACH configuration conflicts. In this implementation manner, the processing module 23 is further configured to reset the RACH configuration for the first cell when the RACH configuration of the first cell conflicts with the first RACH configuration of the second cell.
  • the communication device provided in this embodiment can perform the actions of the first DU in the method embodiment corresponding to FIG. 19, and its implementation principles and technical effects are similar, and will not be repeated here.
  • the above-mentioned first DU may further include at least one storage module, which may include data and/or instructions, and the processing module and/or the transceiver module (or the receiving module) may read the data and/or the data in the storage module. Or instructions to implement the corresponding method.
  • FIG. 26 is a schematic structural diagram of another communication device provided by an embodiment of this application. It can be understood that the communication device can correspondingly implement the operations or steps corresponding to the second access network device in the foregoing method embodiments.
  • the communication device may be a second access network device or a component configurable in the second access network device, or may be a CU of the second access network device or may be configurable with the second access network device CU components.
  • the communication device may include: a processing module 31 and a sending module 32.
  • the communication device may further include: a receiving module 33.
  • the processing module 31 is configured to obtain the first RACH configuration of the second cell; wherein, the first RACH configuration of the second cell is based on the timing of the first cell, and the second cell is the cell under the second access network device, and the first RACH configuration of the second cell is One cell is a cell under the distributed unit DU, the second cell is an adjacent cell of the first cell, and both CU and DU belong to the first access network device.
  • the processing module 31 may be used to obtain the timing deviation between the first cell and the second cell, the second RACH configuration of the second cell, and according to the timing deviation between the first cell and the second cell, the second cell
  • the RACH configuration is converted to the first RACH configuration of the second cell.
  • the second RACH configuration of the second cell is based on the timing of the second cell.
  • the above-mentioned timing deviation between the first cell and the second cell refers to the timing deviation of the two cells.
  • it may include: frame number deviation and frame boundary deviation between the first cell and the second cell; or, frame number deviation, subframe number deviation, and subframe boundary deviation between the first cell and the second cell; or, the first cell and the second cell The time deviation of the two cells relative to the frame boundary of the same frame, etc.
  • the processing module 31 may obtain the timing deviation between the first cell and the second cell through the timing deviation between the first cell and the second cell received by the receiving module 33 from the terminal device. At this time, the processing module 31 and the receiving module 33 may also be integrated into the processing module 31 or the receiving module 33.
  • the processing module 31 may obtain the timing deviation between the first cell and the second cell through the timing deviation between the first cell and the second cell received by the receiving module 33 from the CU.
  • the processing module 31 and the receiving module 33 may also be integrated into the processing module 31 or the receiving module 33.
  • the sending module 32 is configured to send the first RACH configuration of the second cell to the CU.
  • the sending module 32 is specifically configured to send the RACH configuration of the second cell to the CU, and the first indication information, the first indication information indicating that the RACH configuration of the second cell is the RACH configuration based on the timing of the first cell.
  • the communication device provided in this embodiment can perform the actions of the second access network device in the method embodiment corresponding to FIG. 19, and its implementation principles and technical effects are similar, and will not be repeated here.
  • the above-mentioned second access network device may further include at least one storage module, the storage module may include data and/or instructions, and the processing module and/or the transceiver module (or the receiving module, the sending module) may read and store The data and/or instructions in the module implement the corresponding method.
  • the sending module in each of the above embodiments can be a transmitter when actually implemented, and the receiving module can be a receiver when actually implemented, or the sending module and the receiving module are realized by a transceiver, or the sending module and the receiving module
  • the module is realized through the communication port.
  • the processing module can be implemented in the form of software called by processing elements; it can also be implemented in the form of hardware.
  • the processing module can be at least one separately set up processing element, or it can be integrated into a certain chip of the aforementioned CU or DU.
  • it can also be stored in the memory of the aforementioned CU or DU in the form of program code.
  • a certain processing element of the CU or DU calls and executes the functions of the above processing modules.
  • all or part of these modules can be integrated together or implemented independently.
  • the processing element described here may be an integrated circuit with signal processing capability.
  • each step of the above method or each of the above modules can be completed by an integrated logic circuit of hardware in the processor element or instructions in the form of software.
  • the above modules may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASIC), or one or more microprocessors (digital signal processor, DSP), or, one or more field programmable gate arrays (FPGA), etc.
  • ASIC application specific integrated circuit
  • DSP digital signal processor
  • FPGA field programmable gate arrays
  • the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call program codes.
  • CPU central processing unit
  • these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • FIG. 27 is a schematic structural diagram of another communication device provided by an embodiment of this application.
  • the communication device may include: at least one processor 41 (for example, a CPU) and at least one memory 42.
  • FIG. 26 is a schematic diagram of a processor 41 and a memory 42 as an example.
  • the memory 42 may include a high-speed random access memory (random-access memory, RAM), and may also include a non-volatile memory (non-volatile memory, NVM), such as at least one disk memory, and the memory 42 may store various instructions And/or data to complete various processing functions and implement the method steps of the present application.
  • the communication device involved in the present application may further include: a power supply 43, a communication bus 44, and a communication port 45.
  • the communication bus 44 is used to implement communication connections between components.
  • the above-mentioned communication port 45 is used to realize connection and communication between the communication device and other peripherals.
  • the aforementioned memory 42 is used to store computer executable program codes, and the program codes include instructions; when the processor 41 executes the instructions, the instructions cause the processor 41 of the communication device to execute the first CU in the aforementioned method embodiment.
  • the action, its implementation principle and technical effect are similar, and will not be repeated here. or,
  • the foregoing memory 42 is used to store computer executable program codes, and the program codes include instructions; when the processor 41 executes the instructions, the instructions cause the processor 41 of the communication device to execute the first DU in the foregoing method embodiment.
  • the action, its implementation principle and technical effect are similar, and will not be repeated here. or,
  • the aforementioned memory 42 is used to store computer executable program codes, and the program codes include instructions; when the processor 41 executes the instructions, the instructions cause the processor 41 of the communication device to execute the second access in the aforementioned method embodiment.
  • the actions of the network equipment are similar in implementation principles and technical effects, and will not be repeated here.
  • the embodiment of the present application also provides a computer-readable storage medium on which is stored a computer used to implement the method executed by the first DU in the foregoing method embodiment, or the method executed by the first CU or the second access network device instruction.
  • the communication device can implement the method executed by the first DU, or the method executed by the first CU, or the method executed by the second access network device in the foregoing method embodiment.
  • the embodiments of the present application also provide a computer program product containing instructions, which when executed, cause the computer to implement the method executed by the first DU, the method executed by the first CU, or the method executed by the second DU in the foregoing method embodiments.
  • An embodiment of the present application also provides a communication system, which includes the first access network device including the first CU and the first DU in the above embodiment, and/or the second access network device.
  • the communication system includes: the first CU and the first DU in the embodiment described above with reference to any one of FIG. 12 and FIG. 14 to FIG. 16.
  • the communication system includes: the first CU and the first DU in the embodiment described above with reference to any one of FIGS. 19 to 23.
  • the communication system includes: the communication device described above in conjunction with FIG. 24 and the communication device described in FIG. 25.
  • the communication system includes: the communication device described above in conjunction with FIG. 26 or FIG. 27.
  • the communication system includes: the communication device described in conjunction with FIG. 24, the communication device described in FIG. 25, and the communication device described in FIG. 26.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • software it can be implemented in the form of a computer program product in whole or in part.
  • the computer program product includes one or more computer instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application are generated in whole or in part.
  • the computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • Computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium.
  • computer instructions may be transmitted from a website, computer, server, or data center through a cable (such as Coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) to transmit to another website site, computer, server or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state drive (SSD)).
  • plural herein refers to two or more than two.
  • the term “and/or” in this article is only an association relationship describing the associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone B these three situations.
  • the character “/” in this article generally indicates that the associated objects before and after are in an “or” relationship; in the formula, the character "/" indicates that the associated objects before and after are in a "division" relationship.
  • the size of the sequence numbers of the foregoing processes does not mean the order of execution.
  • the execution order of the processes should be determined by their functions and internal logic, and should not be used for the implementation of this application.
  • the implementation process of the example constitutes any limitation.

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Abstract

本申请实施例提供的通信方法及装置，在接入网设备的DU下的小区与邻区采用不同的定时时，DU可以获取到第一小区与第二小区的定时配置，或者，第二小区基于第一小区定时的RACH配置。当该方法应用到RACH优化场景中时，DU可以基于上述所获取到的信息，可以在同一定时下，对两个小区的RACH配置进行判断，从而可以准确地识别出该小区与邻区是否发生了RACH配置冲突，进而可以在发生冲突时，对该小区的RACH配置进行优化，从而确保终端设备随机接入的成功率和接入时延。

Description

通信方法及装置
本申请要求于2020年02月14日提交中国专利局、申请号为202010093555.0、申请名称为“通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请实施例涉及通信技术，尤其涉及一种通信方法及装置。
背景技术
5G通信系统支持自组织网络(self-organized networks，SON)机制，旨在自动完成蜂窝移动通信网络设备的参数配置和优化工作，减少网络操作管理过程中的人工参与，提高网络可靠性，降低运营成本。SON的其中一个功能是自优化(self-optimization)。自优化是指网络设备根据网络的运行状况，自适应调整无线参数，优化网络的性能。
自优化包括随机接入信道(random access channel，RACH)优化。RACH优化旨在通过调整小区的RACH配置，以避免该小区的RACH配置与邻区的RACH配置冲突，从而保证终端设备随机接入该小区的成功率和接入时延。对于5G通信系统中集中式单元(centralized unit，CU)/分布式单元(distributed unit，DU)架构的接入网设备，小区的RACH配置由该小区所属的DU确定。DU基于接入DU下的小区的终端设备上报的RACH报告，以及，该小区邻区的RACH配置，判断该小区的RACH配置与该小区的邻区的RACH配置是否冲突。当存在冲突时，DU可以对该小区的RACH配置进行优化，即DU更改该冲突的小区的部分或全部RACH配置的参数，从而避免冲突。
发明内容
本申请实施例提供一种通信方法及装置，用于解决当DU下的小区与邻区采用不同的定时时，DU无法识别该小区的RACH配置与邻区的RACH配置是否存在冲突的技术问题。
第一方面，本申请实施例提供一种通信方法，该方法可以应用于第一接入网设备的CU、也可以应用于该CU中的芯片。下面以应用于该CU为例对该方法进行描述。
在本方法中，第一接入网设备的CU可以获取第一小区与第二小区的定时偏差。
其中，这里所说的第一小区为第一接入网设备的DU下的小区，第二小区为第一小区的邻接小区。上述所说的第二小区可以为该DU下的小区，也可以为第一接入网设备的其他DU下的小区，也可以为第二接入网设备下的小区。
上述第一小区与第二小区的定时偏差是指两个小区在定时上的偏差。例如可以包括：第一小区与第二小区的帧号偏差和帧边界偏差；或者，第一小区与第二小区的帧号偏差、子帧号偏差和子帧边界偏差；或者，第一小区与第二小区相对于同一帧的帧边界的时间偏差等。
然后，第一接入网设备的CU可以向第一接入网设备的DU发送该第一小区与第二小区的定时偏差。
通过上述方式，可以使DU获知第一小区与第二小区的定时偏差。当该方法应用到RACH优化场景中时，在接入网设备的DU下的小区与邻区采用不同的定时时，DU可以基于CU所发送的该小区与邻区的定时偏差，准确地识别出该小区与邻区是否发生了RACH配置冲突，进而可以在发生冲突时，对该小区的RACH配置进行优化，从而确保终端设备随机接入的成功率和接入时延。
应理解，上述使DU获知第一小区与第二小区的定时偏差也可以应用在其他需要使用该定时偏差的场景中，对此不进行限定。
可选的，上述CU可以通过如下几种方式，向DU发送第一小区与第二小区的定时偏差：
第一种方式：DU主动请求获取该定时偏差。例如，CU接收来自DU的请求消息，该请求消息请求获取第一小区与第二小区的定时偏差，或请求获取第二小区的随机接入信道RACH配置。然后，CU该基于请求消息，向DU发送第一小区与第二小区的定时偏差。可选的，上述请求消息可以携带有第一小区的标识。
第二种方式：CU在F1建立过程向DU发送该定时偏差。例如，CU接收来自DU的F1建立请求消息，然后，CU向DU发送F1建立响应消息，该F1建立响应消息包括第一小区与第二小区的定时偏差。
第三种方式：CU主动发送该定时偏差。例如，CU向DU发送CU配置更新消息，CU配置更新消息包括第一小区与第二小区的定时偏差。
通过上述任一方式，使得CU可以通过不同的消息，向DU发送第一小区与第二小区的定时偏差，扩展了DU获取该定时偏差的场景。
可选的，上述CU可以通过如下几种方式，获取第一小区与第二小区的定时偏差：例如，CU接收来自终端设备的第一小区与第二小区的定时偏差。或者，当第二小区为第二接入网设备下的小区时，CU还可以接收来自第二接入网设备的第一小区与第二小区的定时偏差。通过上述任一方式，扩展了CU获取第一小区与第二小区的定时偏差的实现方式。
第二方面，本申请实施例提供了一种通信方法，该方法可以应用于第一接入网设备的DU、也可以应用于该DU中的芯片。下面以应用于该DU为例对该方法进行描述。
在本方法中，第一接入网设备的DU可以接收来自第一接入网设备的CU的第一小区与第二小区的定时偏差。然后，DU可以保存该第一小区与第二小区的定时偏差。其中，关于第一小区、第二小区，以及，第一小区与第二小区的定时偏差的描述可以参见第一方面。
可选的，该方法还可以包括：DU接收来自CU的第二小区的随机接入信道RACH配置。然后，DU根据第一小区与第二小区的定时偏差、第二小区的RACH配置，以及，第一小区的RACH配置，确定第一小区的RACH配置与第二小区的RACH配置是否冲突。
在该实现方式下，若第一小区的RACH配置与第二小区的RACH配置冲突，则DU可以为第一小区重新设置RACH配置。例如，DU可以更改第一小区的部分或全部RACH配置的参数，从而避免与第二小区的RACH配置冲突。若第一小区的RACH配置与第二小区的RACH配置不冲突，则DU可以不做任何处理。
上述第二方面和第二方面的各可能的实现方式所提供的通信方法，其有益效果可以参见上述第一方面和第一方面的各可能的实现方式所带来的有益效果，在此不加赘述。
第三方面，本申请实施例提供一种通信方法，该方法可以应用于第一接入网设备的CU、也可以应用于该CU中的芯片。下面以应用于该CU为例对该方法进行描述。
在本方法中，第一接入网设备的CU可以获取第二小区的第一RACH配置，其中，第二小区的第一RACH配置是基于第一小区的定时的。然后，第一接入网设备的CU可以向第一接入网设备的DU发送第二小区的第一RACH配置。其中，关于第一小区和第二小区的描述可以参见前述第一方面。
通过上述方式，可以使DU获知第二小区的第一RACH配置。当该方法应用到RACH优化场景中时，在接入网设备的DU下的小区与邻区采用不同的定时时，DU可以基于CU所发送的邻区基于该小区定时的RACH配置，以及，该小区基于该小区定时的RACH配置，即，基于同一定时的两个小区的RACH配置，准确地识别出该小区与邻区是否发生了RACH配置冲突，进而可以在发生冲突时，对该小区的RACH配置进行优化，从而确保终端设备随机接入的成功率和接入时延。
可选的，CU可以通过如下两种方式获取第二小区的第一RACH配置：
第一种方式：CU获取第一小区与第二小区的定时偏差、第二小区的第二RACH配置。其中，第二小区的第二RACH配置是基于第二小区定时的。然后，CU根据第一小区与第二小区的定时偏差，将第二小区的第二RACH配置转换为第二小区的第一RACH配置。关于第一小区与第二小区的定时偏差的解释，以及，CU获取第一小区与第二小区的定时偏差的方式可以参见第一方面的描述。
应理解，在一些实施例中，针对第一小区邻接的部分或全部第二小区，第一CU可能没有第一小区与这些小区的定时偏差。在该场景下，第一CU可以不执行该RACH配置转换操作。
第二种方式：当第二小区为第二接入网设备下的小区时，CU可以接收来自第二接入网设备的第二小区的第一RACH配置。
在一些实施例中，第二接入网设备可能没有第一小区与第二小区的定时偏差。在该场景下，第二接入网设备可以不执行该RACH配置转换操作，而是将第二小区的第二RACH配置发送给第一接入网设备的CU。因此，为了能够使第一接入网设备的CU能够准确的获知所接收到的第二小区的RACH配置是基于哪个小区定时的RACH配置，上述第一接入网设备的CU接收来自第二接入网设备的第二小区的第一RACH配置可以包括：第一接入网设备的CU接收来自第二接入网设备的第二小区的RACH配置，以及，第一指示信息。其中，该第一指示信息指示第二小区的RACH配置为基于第一小区定时的RACH配置。
可选的，CU可以通过如下三种方式向DU发送第二小区的第一RACH配置：
第一种方式：DU主动请求获取第二小区的RACH配置。例如，CU接收来自DU的请求消息，请求获取第二小区的RACH配置。然后，CU基于该请求消息，向DU发送第二小区的第一RACH配置。可选的，上述请求消息可以携带有第一小区的标识。
第二种方式：CU在F1建立过程向DU发送第二小区的第一RACH配置。例如，CU接收来自DU的F1建立请求消息。然后，CU向DU发送F1建立响应消息，该F1建立响应消息包括第二小区的第一RACH配置。
第三种方式：CU主动发送第二小区的第一RACH配置。例如，CU向DU发送CU配置更新消息，该CU配置更新消息包括第二小区的第一RACH配置。
通过上述任一方式，使得CU可以通过不同的消息，向DU发送第二小区的第一RACH配置，扩展了DU获取该第二小区的第一RACH配置的场景。
如上所说，在一些实施例中，上述CU所获取到的一些第二小区的RACH配置并非是基于第一小区定时的RACH配置，在该情况下，第一CU可以不向第一DU发送这些没有基于第一小区定时的第二小区的RACH配置，即只发送基于第一小区定时的第二小区的RACH配置。或者，第一CU在向第一DU发送第二小区的RACH配置时，还可以携带有第二指示信息，该第二指示信息指示该第二小区的RACH配置是否为基于第一小区定时的RACH配置。这样，第一DU在接收到第一CU发送的第二小区的RACH配置后，可以基于该第二指示信息，获知该第二小区的RACH配置是否为基于第一小区定时的RACH配置。
第四方面，本申请实施例提供了一种通信方法，该方法可以应用于第一接入网设备的DU、也可以应用于该DU中的芯片。下面以应用于该DU为例对该方法进行描述。
在本方法中，第一接入网设备的DU接收来自第一接入网设备的CU的第二小区的第一RACH配置。其中，第二小区的第一RACH配置是基于第一小区的定时的。然后，第一接入网设备的DU可以保存第二小区的第一RACH配置。关于第一小区、第二小区的描述可以参见第一方面。
可选的，该方法还可以包括：DU根据第二小区的第一RACH配置，以及，第一小区的RACH配置，确定第一小区的RACH配置与第二小区的第一RACH配置是否冲突。
在该实现方式下，若第一小区的RACH配置与第二小区的第一RACH配置冲突，则DU为第一小区重新设置RACH配置。例如，DU可以更改第一小区的部分或全部RACH配置的参数，从而避免与第二小区的RACH配置冲突。若第一小区的RACH配置与第二小区的第一RACH配置不冲突，则DU可以不做任何处理。
上述第四方面和第四方面的各可能的实现方式所提供的通信方法，其有益效果可以参见上述第三方面和第三方面的各可能的实现方式所带来的有益效果，在此不加赘述。
第五方面，本申请实施例提供一种通信装置。该通信装置可以包括：处理模块、发送模块。可选的，在一些实施例中，该通信装置还可以包括：第一接收模块和/或第二接收模块。
处理模块，用于获取第一小区与第二小区的定时偏差。其中，第一小区为DU下的小区，第二小区为第一小区的邻接小区，该CU和该DU均属于第一接入网设备。上述第一小区与第二小区的定时偏差是指两个小区在定时上的偏差。例如可以包括：第一小区与第二小区的帧号偏差和帧边界偏差；或者，第一小区与第二小区的帧号偏差、子帧号偏差和子帧边界偏差；或者，第一小区与第二小区相对于同一帧的帧边界的时间偏差等。示例性的，处理模块，具体用于通过第二接收模块接收的来自终端设备的第一小区与第二小区的定时偏差来获取第一小区与第二小区的定时偏差。此时，处理模块和第二接收模块也可以集成为处理模块或者第二接收模块。或者，当第二小区为第二接入网设备下的小区时，处理模块，具体用于通过第二接收模块接收的来自第二接入网设备的第一小区与第二小区的定时偏差来获取第一小区与第二小区的定时偏差。此时，处理模块和第二接收模块也可以集成为处理模块或者第二接收模块。
发送模块，用于向DU发送第一小区与第二小区的定时偏差。
例如，第一接收模块，用于接收来自DU的请求消息。该请求消息请求获取第一小区与第二小区的定时偏差，或请求获取第二小区的随机接入信道RACH配置。相应地，发送模块，具体用于基于请求消息，向DU发送第一小区与第二小区的定时偏差。可选的，请求消息携带有第一小区的标识。
或者，第一接收模块，用于接收来自DU的F1建立请求消息。相应地，发送模块，具体用于向DU发送F1建立响应消息，F1建立响应消息包括第一小区与第二小区的定时偏差；
或者，发送模块，具体用于向DU发送CU配置更新消息，CU配置更新消息包括第一小区与第二小区的定时偏差。
上述第五方面和第五方面的各可能的实现方式所提供的通信装置，其有益效果可以参见上述第一方面和第一方面的各可能的实现方式所带来的有益效果，在此不加赘述。
第六方面，本申请实施例提供一种通信装置，该通信装置可以包括：接收模块和存储模块。可选的，在一些实施例中，该通信装置还可以包括：处理模块。
接收模块，用于接收来自集中式单元CU的第一小区与第二小区的定时偏差。其中，第一小区为DU下的小区，第二小区为第一小区的邻接小区，CU和DU均属于第一接入网设备。存储模块，用于保存第一小区与第二小区的定时偏差。
在一些实施例中，接收模块，还用于接收来自CU的第二小区的随机接入信道RACH配置。相应地，处理模块，用于根据第一小区与第二小区的定时偏差、第二小区的RACH配置，以及，第一小区的RACH配置，确定第一小区的RACH配置与第二小区的RACH配置是否冲突。在该实现方式下，处理模块，还可以用于在第一小区的RACH配置与第二小区的RACH配置冲突时，为第一小区重新设置RACH配置。
上述第六方面和第六方面的各可能的实现方式所提供的通信装置，其有益效果可以参见上述第二方面和第二方面的各可能的实现方式所带来的有益效果，在此不加赘述。
第七方面，本申请实施例提供一种通信装置，该通信装置可以包括：处理模块、发送模块。可选的，该通信装置还可以包括第一接收模块和/或第二接收模块。
处理模块，用于获取第二小区的第一RACH配置。其中，第二小区的第一RACH配置是基于第一小区的定时的。第一小区为分布式单元DU下的小区，第二小区为第一小区的邻接小区，CU和DU均属于第一接入网设备。
例如，处理模块，可以用于获取第一小区与第二小区的定时偏差、第二小区的第二RACH配置，并根据第一小区与第二小区的定时偏差，将第二小区的第二RACH配置转换为第二小区的第一RACH配置。该第二小区的第二RACH配置是基于第二小区定时的。
上述第一小区与第二小区的定时偏差是指两个小区在定时上的偏差。例如可以包括：第一小区与第二小区的帧号偏差和帧边界偏差；或者，第一小区与第二小区的帧号偏差、子帧号偏差和子帧边界偏差；或者，第一小区与第二小区相对于同一帧的帧边界的时间偏差等。示例性的，处理模块，可以通过第一接收模块接收的来自终端设备的第一小区与第二小区的定时偏差来获取第一小区与第二小区的定时偏差。此时，处理模块和第一接收模块也可以集成为处理模块或者第一接收模块。或者，在第二小区为第二接入网设备下的小区时，处理模块，可以通过第一接收模块接收的来自第二接入网设备的第一小区与第二小 区的定时偏差来获取第一小区与第二小区的定时偏差。此时，处理模块和第一接收模块也可以集成为处理模块或者第一接收模块。
再例如，当第二小区为第二接入网设备下的小区时，处理模块，可以通过第一接收模块接收来自第二接入网设备的第二小区的第一RACH配置。作为一种可能的实现方式，处理模块，可以通过第一接收模块接收来自第二接入网设备的第二小区的RACH配置，以及，第一指示信息，第一指示信息指示第二小区的RACH配置为基于第一小区定时的RACH配置。
发送模块，用于向DU发送第二小区的第一RACH配置。
例如，第二接收模块，用于接收来自DU的请求消息，该请求消息请求获取第二小区的RACH配置。相应地，发送模块，具体用于基于请求消息，向DU发送第二小区的第一RACH配置。可选的，请求消息携带有第一小区的标识。
或者，第二接收模块，用于接收来自DU的F1建立请求消息。相应地，发送模块，具体用于向DU发送F1建立响应消息，F1建立响应消息包括第二小区的第一RACH配置。
或者，发送模块，具体用于向DU发送CU配置更新消息，CU配置更新消息包括第二小区的第一RACH配置。
可选的，发送模块，具体用于向DU发送第二小区的RACH配置，以及，第二指示信息。其中，第二指示信息指示第二小区的RACH配置为基于第一小区定时的RACH配置。
上述第七方面和第七方面的各可能的实现方式所提供的通信装置，其有益效果可以参见上述第三方面和第三方面的各可能的实现方式所带来的有益效果，在此不加赘述。
第八方面，本申请实施例提供一种通信装置，该通信装置可以包括：接收模块和存储模块。可选的，在一些实施例中，该通信装置还可以包括：处理模块。
接收模块，用于接收来自集中式单元CU的第二小区的第一RACH配置。其中，第二小区的第一RACH配置是基于第一小区的定时的，第一小区为DU下的小区，第二小区为第一小区的邻接小区，CU和DU均属于第一接入网设备。存储模块，用于保存第二小区的第一RACH配置。
在该实现方式下，在一些实施例中，处理模块，用于根据第二小区的第一RACH配置，以及，第一小区的RACH配置，确定第一小区的RACH配置与第二小区的第一RACH配置是否冲突。在该实现方式下，处理模块，还用于在第一小区的RACH配置与第二小区的第一RACH配置冲突时，为第一小区重新设置RACH配置。
上述第八方面和第八方面的各可能的实现方式所提供的通信装置，其有益效果可以参见上述第四方面和第四方面的各可能的实现方式所带来的有益效果，在此不加赘述。
第九方面，本申请实施例提供一种通信方法，该方法可以应用于第二接入网设备，也可以应用于第二接入网设备的CU、也可以应用于该CU中的芯片。下面以应用于该第二接入网设备为例对该方法进行描述。
在本方法中，第二接入网设备获取第二小区的第一RACH配置。其中，第二小区的第一RACH配置是基于第一小区的定时的，第二小区为第二接入网设备下的小区，第一小区为分布式单元DU下的小区，第二小区为第一小区的邻接小区，CU和DU均属于第一接入网设备。然后，第二接入网设备向CU发送第二小区的第一RACH配置。其中，关于第一小区和第二小区的描述可以参见前述第一方面。
可选的，第二接入网设备可以通过如下方式获取第二小区的第一RACH配置。例如，第二接入网设备获取第一小区与第二小区的定时偏差、第二小区的第二RACH配置。其中，第二小区的第二RACH配置是基于第二小区定时的。然后，第二接入网设备根据第一小区与第二小区的定时偏差，将第二小区的第二RACH配置转换为第二小区的第一RACH配置。
上述第一小区与第二小区的定时偏差是指两个小区在定时上的偏差。例如可以包括：第一小区与第二小区的帧号偏差和帧边界偏差；或者，第一小区与第二小区的帧号偏差、子帧号偏差和子帧边界偏差；或者，第一小区与第二小区相对于同一帧的帧边界的时间偏差等。
可选的，第二接入网设备可以通过如下两种方式获取第一小区与第二小区的定时偏差：第二接入网设备接收来自终端设备的第一小区与第二小区的定时偏差；或者，第二接入网设备接收来自CU的第一小区与第二小区的定时偏差。
在一些实施例中，第二接入网设备可能没有第一小区与第二小区的定时偏差。在该场景下，第二接入网设备可以不执行该RACH配置转换操作，而是将第二小区的第二RACH配置发送给第一接入网设备的CU。因此，为了能够使第一接入网设备的CU能够准确的获知所接收到的第二小区的RACH配置是基于哪个小区定时的RACH配置，上述第二接入网设备向CU发送第二小区的第一RACH配置，包括：第二接入网设备向CU发送第二小区的RACH配置，以及，第一指示信息。其中，第一指示信息指示第二小区的RACH配置为基于第一小区定时的RACH配置。
上述第九方面和第九方面的各可能的实现方式所提供的通信方法，其有益效果可以参见上述第三方面和第三方面的各可能的实现方式所带来的有益效果，在此不加赘述。
第十方面，本申请实施例提供一种通信装置。该通信装置可以包括：处理模块和发送模块。可选的，在一些实施例中，该通信装置还可以包括：接收模块。
处理模块，用于获取第二小区的第一RACH配置；其中，第二小区的第一RACH配置是基于第一小区的定时的，第二小区为第二接入网设备下的小区，第一小区为分布式单元DU下的小区，第二小区为第一小区的邻接小区，CU和DU均属于第一接入网设备。
例如，处理模块，可以用于获取第一小区与第二小区的定时偏差、第二小区的第二RACH配置，并根据第一小区与第二小区的定时偏差，将第二小区的第二RACH配置转换为第二小区的第一RACH配置。该第二小区的第二RACH配置是基于第二小区定时的。
上述第一小区与第二小区的定时偏差是指两个小区在定时上的偏差。例如可以包括：第一小区与第二小区的帧号偏差和帧边界偏差；或者，第一小区与第二小区的帧号偏差、子帧号偏差和子帧边界偏差；或者，第一小区与第二小区相对于同一帧的帧边界的时间偏差等。示例性的，处理模块，可以通过接收模块接收的来自终端设备的第一小区与第二小区的定时偏差来获取第二小区的第一RACH配置。或者，处理模块，可以通过接收模块接收的来自CU的第一小区与第二小区的定时偏差来获取第二小区的第一RACH配置。
发送模块，用于向CU发送第二小区的第一RACH配置。例如，发送模块，具体用于向CU发送第二小区的RACH配置，以及，第一指示信息，第一指示信息指示第二小区的RACH配置为基于第一小区定时的RACH配置。
上述第十方面和第十方面的各可能的实现方式所提供的通信装置，其有益效果可以参 见上述第九方面和第九方面的各可能的实现方式所带来的有益效果，在此不加赘述。
第十一方面，本申请实施例提供一种通信装置，该通信装置包括：处理器、存储器、通信端口；通信装置通过通信端口实现接收和发送。
其中，存储器用于存储计算机可执行程序代码，程序代码包括指令；当处理器执行指令时，指令使通信装置执行如第一方面至第四方面、或者第九方面任一项所描述的方法。
第十二方面，本申请实施例提供一种通信装置，该通信装置包括：如前述第一方面所描述的CU，以及，第二方面所描述的DU；或者，如前述第三方面所描述的CU，以及，第四方面所描述的DU；或者，如前述第五方面所描述的通信装置，以及，第六方面所描述的通信装置；或者，如前述第七方面所描述的通信装置，以及，第八方面所描述的通信装置；或者，如前述第十一方面所描述的通信装置。在一些实施例中，该通信装置例如可以称为无线接入网设备。
第十三方面，本申请实施例提供了一种通信系统，该通信系统可以包括如前述第一方面所描述的CU，以及，第二方面所描述的DU；或者，如前述第三方面所描述的CU，以及，第四方面所描述的DU；或者，如前述第五方面所描述的通信装置，以及，第六方面所描述的通信装置；或者，如前述第七方面所描述的通信装置，以及，第八方面所描述的通信装置；或者，如前述第九方面所描述的第二接入网设备；或者，如前述第十方面所描述的通信装置；或者，如前述第十一方面所描述的通信装置；或者，如前述第三方面所描述的第一接入网设备的CU，第四方面所描述的第一接入网设备的DU，以及，第九方面所描述的第二接入网设备；或者，如前述第七方面所描述的通信装置，第八方面所描述的通信装置，以及，前述第十方面所描述的通信装置。
第十四方面，本申请实施例提供一种芯片，该芯片上存储有计算机程序，在计算机程序被该芯片执行时，实现如第一方面至第四方面、或第九方面任一项所描述的方法。
第十五方面，本申请实施例提供一种通信装置，包括用于执行以上第一方面或第一方面各可能的实施方式，或者，第三方面或第三方面各可能的实施方式所提供的方法的单元、模块或电路，或者，第九方面或第九方面各可能的实施方式所提供的方法的单元、模块或电路。该通信装置可以为CU，也可以为应用于CU的一个模块，例如，可以为应用于CU的芯片。
第十六方面，本申请实施例提供一种通信装置，包括用于执行以上第二方面或第二方面各可能的实施方式，或者，第四方面或第四方面各可能的实施方式所提供的方法的单元、模块或电路。该通信装置可以为DU，也可以为应用于DU的一个模块，例如，可以为应用于DU的芯片。
第十七方面，本申请实施例提供一种计算机可读存储介质，用于存储计算机程序或指令，当计算机程序或指令在计算机上运行时，使得计算机执行如第一方面至第四方面、或第九方面任一项所描述的方法。
第十八方面，本申请实施例提供一种计算机程序产品，当计算机程序产品在计算机上运行时，使得计算机执行如第一方面至第四方面任一项所描述的方法。
第十九方面，本申请实施例提供一种包含指令的计算机程序产品，当其在计算机上运行时，使得计算机执行第一方面至第四方面、或第九方面任一项所描述的方法。
本申请实施例提供的通信方法及装置，在接入网设备的DU下的小区与邻区采用不同 的定时时，DU可以获取到第一小区与第二小区的定时配置，或者，第二小区基于第一小区定时的RACH配置。当该方法应用到RACH优化场景中时，DU可以基于上述所获取到的信息，可以在同一定时下，对两个小区的RACH配置进行判断，从而可以准确地识别出该小区与邻区是否发生了RACH配置冲突，进而可以在发生冲突时，对该小区的RACH配置进行优化，从而确保终端设备随机接入的成功率和接入时延。
附图说明
图1为本申请实施例应用的移动通信系统的架构示意图；
图2为一种5G通信系统的架构示意图；
图3为一种接入网设备的示意图；
图4为一种时域资源示意图；
图5为另一种时域资源示意图一；
图6为另一种时域资源示意图二；
图7为另一种时域资源示意图三；
图8为另一种时域资源示意图四；
图9为另一种时域资源示意图五；
图10为一种RACH时域资源示意图；
图11为另一种RACH时域资源示意图；
图12为本申请实施例提供的一种通信方法的流程示意图；
图13为又一种RACH时域资源示意图；
图14为本申请实施例提供的另一种通信方法的流程示意图；
图15为本申请实施例提供的又一种通信方法的流程示意图；
图16为本申请实施例提供的又一种通信方法的流程图；
图17为又一种RACH时域资源示意图一；
图18为又一种RACH时域资源示意图二；
图19为本申请实施例提供的又一种通信方法的流程示意图；
图20为本申请实施例提供的又一种通信方法的流程示意图；
图21为本申请实施例提供的又一种通信方法的流程示意图；
图22为本申请实施例提供的又一种通信方法的流程示意图；
图23为本申请实施例提供的又一种通信方法的流程图；
图24为本申请实施例提供的一种通信装置的结构示意图；
图25为本申请实施例提供的另一种通信装置的结构示意图；
图26为本申请实施例提供的又一种通信装置的结构示意图；
图27为本申请实施例提供的又一种通信装置的结构示意图。
具体实施方式
图1为本申请实施例应用的移动通信系统的架构示意图。如图1所示，该移动通信系统可以包括核心网设备110、无线接入网(radio access network，RAN)设备120和至少一 个终端设备(如图1中的终端设备130和终端设备140)。终端设备通过无线的方式与无线接入网设备120相连，无线接入网设备120通过无线或有线方式与核心网设备110连接。核心网设备110与无线接入网设备120可以是独立的不同的物理设备，也可以是将核心网设备110的功能与无线接入网设备120的逻辑功能集成在同一个物理设备上，还可以是一个物理设备上集成了部分核心网设备110的功能和部分的无线接入网设备120的功能。终端设备可以是固定位置的，也可以是可移动的。图1只是示意图，该移动通信系统中还可以包括其它网络设备，例如还可以包括无线中继设备和无线回传设备等，在图1中未画出。本申请实施例对该移动通信系统中包括的核心网设备110、无线接入网设备120和终端设备的数量不做限定。
无线接入网设备120是终端设备通过无线方式接入到该移动通信系统中的接入设备，可以是基站NodeB、演进型基站(evolutional node B，eNB或eNodeB)、5G移动通信系统或新一代无线(new radio，NR)通信系统中的基站(如gNB或ng-eNB)、未来移动通信系统中的基站、WiFi系统中的接入节点、中继站等，本申请实施例对无线接入网设备120所采用的具体技术和具体设备形态不做限定。在本申请实施例中，无线接入网设备120简称接入网设备，如果无特殊说明，在本申请实施例中，接入网设备均指无线接入网设备120。另外，在本申请实施例中，术语5G和NR可以等同。
终端设备也可以称为终端Terminal、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等。终端设备可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。
无线接入网设备120和终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和人造卫星上。本申请实施例对无线接入网设备120和终端设备的应用场景不做限定。
无线接入网设备120和终端设备之间可以通过授权频谱(licensed spectrum)进行通信，也可以通过免授权频谱(unlicensed spectrum)进行通信，也可以同时通过授权频谱和免授权频谱进行通信。无线接入网设备120和终端设备之间可以通过6吉兆赫(gigahertz，GHz)以下的频谱进行通信，也可以通过6GHz以上的频谱进行通信，还可以同时使用6GHz以下的频谱和6GHz以上的频谱进行通信。本申请实施例对无线接入网设备120和终端设备之间所使用的频谱资源不做限定。
以5G通信系统为例，图2为一种5G通信系统的架构示意图。如图2所示，5G通信系统包括由多个接入网设备构成的下一代无线接入网络(next generation-radio access network，NG-RAN)和多个核心网设备构成的5G核心网(5G core，5GC)。
在一种可能的方式中，NG-RAN中的接入网设备可以是集中式单元(centralized unit，CU)和分布式单元(distributed unit，DU)分离架构的接入网设备。CU和DU可以理解为是对接入网设备从逻辑功能角度的划分。CU和DU在物理上可以是分离的也可以部署在一起。多个DU可以共用一个CU，一个DU下可以有多个小区。CU和DU之间可以通 过F1接口相连。CU可以代表接入网设备通过NG接口和5GC连接，可以代表接入网设备通过Xn接口(例如Xn-C(控制面)接口)和其他接入网设备连接。
可选的，CU的功能和DU的功能可以根据无线网络的协议层进行划分。例如无线资源控制(radio resource control，RRC)层、服务数据适应协议(service data adaptation protocol，SDAP)层以及分组数据汇聚协议(packet data convergence protocol，PDCP)层的功能设置在CU，而无线链路控制(radio link control，RLC)层、介质访问控制(media access control，MAC)层以及物理层(physical，PHY)层等的功能设置在DU。可以理解，上述对CU的功能和DU的功能按照协议层进行划分仅仅是一种举例，也可以按照其他的方式进行划分。例如，CU或者DU可以具有更多协议层的功能，或者，CU或DU还可以具有协议层的部分处理功能。示例性的，可以将RLC层的部分功能和RLC层以上的协议层的功能设置在CU，将RLC层的剩余功能和RLC层以下的协议层的功能设置在DU。
或者，CU的功能和DU的功能还可以按照业务类型或者其他系统需求进行划分。例如按时延划分，将处理时间需要满足时延要求的功能设置在DU中，不需要满足该时延要求的功能设置在CU中。
或者，CU可以具有核心网的一个或多个功能。一个或者多个CU可以集中设置，也分离设置。例如CU可以设置在网络侧方便集中管理。DU可以具有多个射频功能，也可以将射频功能拉远设置。
应理解，CU的功能可以由一个实体来实现，也可以由不同的实体实现。可选的，可以对CU的功能进行进一步切分，示例性的，图3为一种接入网设备的示意图，如图3所示，可以将CU的控制面(control plane，CP)和用户面(user plane，UP)分离，即CU的控制面(CU-CP)和CU用户面(CU-UP)。其中，CU-CP和CU-UP可以由不同的功能实体来实现，CU-CP和CU-UP可以与DU相耦合，共同完成接入网设备的功能。一种可能的方式中，CU-CP负责控制面功能，主要包含RRC层的功能和PDCP-C的功能。PDCP-C主要负责控制面数据的加解密、完整性保护、数据传输等。CU-UP负责用户面功能，主要包含SDAP层的功能和PDCP-U。其中，PDCP-U主要负责数据面的加解密、完整性保护、头压缩、序列号维护、数据传输等。CU-CP和CU-UP可以通过E1接口连接。CU-CP代表接入网设备可以通过NG接口和核心网设备连接，通过F1-C(控制面)和DU连接，CU-UP通过F1-U(用户面)和DU连接。可选的，还有一种可能的实现是PDCP-C的功能也在CU-UP侧。
5G通信系统中的小区存在如下两种情况：
情况1：两个小区之间采用相同的定时(timing)(或者说使用相同的定时参考)，即，两个小区的“时间”同步。或者说，两个小区帧边界对齐(帧边界对齐，意味着子帧边界对齐，子帧号同步)，并且帧号同步。
情况2：两个小区之间采用的定时不同(或者说使用不同的定时参考)，即，两个小区的“时间”不同步。包括帧边界对齐但是帧号不同步，或者帧边界不对齐(帧边界不对齐，即帧之间有交叉，因此帧号不可能同步)。
5G通信系统中时域上的时间单位包括帧和子帧，其中，1个帧占用10毫秒，帧号从0开始，每1024个帧号为一个循环。1个帧包含10个子帧，每个子帧占用1毫秒。下面以帧和子帧为例，对上述两种情况进行示例说明。
在该示例下，两个小区之间采用相同的定时时，这两个小区的“时间”同步可以如下述表1所示：
表1
序号 帧边界 帧号
1 对齐 同步
图4为一种时域资源示意图，以相邻的小区A和小区B为例(应理解，这里所说的相邻两个小区是指邻接的两个小区，比如，两个小区的覆盖范围存在部分相同的区域。其中一个小区可以称为另一个小区的邻接小区(简称邻区))。如图4所示，当小区A和小区B在采用相同的定时时，两个小区在同一时刻都对应帧号n，且两个小区的帧号为n的帧边界是对齐的。
两个小区之间采用不同的定时时，这两个小区的“时间”不同步可以如下述表2所示：
表2
序号 帧边界 帧号 子帧边界 子帧号
1 对齐 不同步 对齐 同步
2 不对齐 不同步 对齐 不同步
3 不对齐 不同步 不对齐 不同步
图5为另一种时域资源示意图一，图6为另一种时域资源示意图二，图7为另一种时域资源示意图三，图8为另一种时域资源示意图四，图9为另一种时域资源示意图五。仍然以相邻的小区A和小区B为例，当小区A和小区B在采用不同的定时时，若两个小区为表2中序号1所示的“时间”不同步，则小区A和小区B的帧关系可以如图5所示。若两个小区为表2中序号2所示的“时间”不同步，则小区A和小区B的帧关系可以如图6所示或图7所示。若两个小区为表2中序号3所示的“时间”不同步，则小区A和小区B的帧关系可以如图8所示或图9所示。
应理解，表1和表2仅是一种示意，当时间单位的粒度进行更细粒度的划分(例如符号、时隙等)时，上述相邻两个小区的时间关系可以进一步细化，即，当相邻两个小区采用相同的定时时，该两个小区最小粒度的时间单位的编号相同、且边界对齐。当相邻两个小区采用不同的定时时，该两个小区之间至少一个粒度的时间单位的编号不同和/或边界不对齐。例如下述至少一项：帧号不同步、子帧号不同步、时隙号不同步、符号编号不同步、帧边界不对齐、子帧边界不对齐、时隙边界不对齐、符号边界不对齐等。
自组织网络(self-organized networks，SON)是在长期演进(long term evolution，LTE)标准化阶段提出的概念，引入该技术旨在自动完成蜂窝移动通信网络设备的参数配置和优化工作，减少网络操作管理过程中的人工参与，提高网络可靠性，降低运营成本。5G通信系统也支持SON机制。SON主要包括三大功能，分别是自配置(self-configuration)、自优化(self-optimization)、自治愈(self-healing)。其中，自优化是指网络设备根据网络的运行状况，自适应调整无线参数(例如发射功率、切换门限和小区个性偏移量等)，优化网络的性能。自优化主要包括移动性负载均衡(mobility load balancing，MLB)、随机接入信道(random access channel，RACH)优化和移动健壮性优化(mobility robust optimization，MRO)。
小区的RACH配置主要是物理随机接入信道(physical random access channel，PRACH) 配置，可以包括：PRACH前导序列和格式相关的配置参数、PRACH资源时域相关的配置参数、PRACH资源频域相关的配置参数等。在本申请实施例中，可以将RACH配置替换为PRACH配置，也在本发明的保护范围内。为了便于描述，下述均以RACH配置为例进行说明。
若小区的RACH配置设置的不合理，导致该小区的RACH配置与该小区的邻区的RACH配置冲突，易引起该小区与邻区的随机接入前导混淆等问题，导致该小区与邻区下的终端设备接入失败，或者引起虚警，加重接入网设备的信令负荷等。因此，自优化中的RACH优化旨在通过调整小区的RACH配置，以避免与邻区的RACH配置冲突，从而保证终端设备随机接入小区的成功率和接入时延。
如前述所说，对于图2所示的CU/DU架构的接入网设备，目前提出小区的RACH配置由该小区所属的DU确定，即，由DU设置DU下的小区的RACH配置和执行RACH优化。
下面通过一个示例来描述DU执行RACH优化的过程。
以接入网设备A的DU下的小区1为例，其中，小区1的邻区为小区2。接入网设备A的DU可以基于小区1的RACH配置和小区2的RACH配置，判断两个小区的RACH配置是否存在冲突。若该小区1的RACH配置与小区2的RACH配置冲突，可选的，接入网设备A的DU可以对小区1的RACH配置进行优化，以保证终端设备随机接入小区1的成功率和接入时延。例如，接入网设备A的DU可以更改该小区1的部分或全部RACH配置的参数，从而避免与小区2的RACH配置冲突。
在采用上述方式进行RACH优化时，若小区1与小区2之间采用相同的定时，即两个小区的“时间”同步，则接入网设备A的DU可以基于小区1的RACH配置和小区2的RACH配置，准确的识别出小区1的RACH配置与小区2的RACH配置是否存在冲突。
若小区1与小区2之间采用不同的定时，即，两个小区的“时间”不同步。此时，接入网设备A的DU所获取到的小区2的RACH配置为基于小区2定时的RACH配置，而小区1的RACH配置是基于小区1定时的RACH配置。在这种情况下，即便小区1与小区2的RACH配置相同，但由于小区1与小区2的定时不同，可能也不存在RACH配置冲突的问题。或者，即便小区1与小区2的RACH配置不同，但由于小区1与小区2的定时不同，可能也会存在RACH配置冲突的问题，导致接入网设备A的DU无法识别小区1的RACH配置与小区2的RACH配置是否存在冲突。
图10为一种RACH时域资源示意图。如图10所示，示例性的，以小区1的RACH资源的时域配置与小区2的RACH资源的时域配置相同为例，即，均允许终端设备在每帧的第1个子帧和第7个子帧上发送RACH。假定小区1的定时与小区2的定时相差2个子帧，则在这种情况下，虽然，小区1与小区2的RACH配置相同，但由于小区1与小区2的定时不同，使得小区1上允许发送RACH的子帧与小区2上允许发送RACH的子帧在时间上不重叠。在这种情况下，两个小区不存在RACH配置冲突的问题。
图11为另一种RACH时域资源示意图。如图11所示，示例性的，以小区1的RACH资源的时域配置与小区2的RACH资源的时域配置不同为例。其中，小区1允许终端设备在每帧的第1个子帧和第7个子帧上发送RACH。小区2允许终端设备在每帧的第0个子帧和第4个子帧上发送RACH。假定小区1的定时与小区2的定时相差3个子帧，则在这种情况下，虽然，小区1与小区2的RACH配置不同，但由于小区1与小区2的定时不同，使得小区1上允许发送 RACH的子帧1与小区2上允许发送RACH的子帧4在时间上重叠，致使两个小区的RACH配置冲突。
综上，当DU下的小区与邻区采用不同的定时时，DU无法识别该小区的RACH配置与邻区的RACH配置是否存在冲突，进而无法优化该小区的RACH配置。
考虑到上述问题，本申请实施例提供了一种通信方法，当DU下的小区与邻区采用不同的定时时，通过使DU获取邻区基于DU下的小区定时的RACH配置，从而使DU可以准确的识别DU下的该小区的RACH配置与邻区的RACH配置是否存在冲突。应理解，本申请实施例提供方法，可以适用于任一存在上述问题的通信系统，包括但不限于5G通信系统。
下面以第一接入网设备的第一CU和第一DU为例，结合具体地实施例对本申请实施例的技术方案进行详细说明。下面这几个具体的实施例可以相互结合，对于相同或者相似的概念或者过程可能在某些实施例不再赘述。应理解，当第一接入网设备包括多个DU时，第一DU可以为第一接入网设备的任一DU。另外，若第一接入网设备为图3所示的架构，则本申请实施例的方法可以由第一接入网设备的第一CU-CP与第一DU交互实现。为了便于描述，下述实施例均以第一CU为例进行说明。
图12为本申请实施例提供的一种通信方法的流程示意图。本实施例以RACH优化场景为例，描述第一接入网设备的第一DU如何获取第一DU下的小区与邻区的定时偏差。如图12所示，该方法可以包括：
S801、第一CU获取第一小区与第二小区的定时偏差。
S802、第一CU向第一DU发送第一小区与第二小区的定时偏差。
相应地，第一DU接收该第一小区与第二小区的定时偏差。
S803、第一DU保存该第一小区与第二小区的定时偏差。该步骤为可选的。例如，第一DU可以将第一小区与第二小区的定时偏差进行保存，并在达到最大存储时长时，将其删除。或者，第一DU可以在接收到第一CU最新发送的该第一小区与第二小区的定时偏差时，将前一次保存的该第一小区与第二小区的定时偏差删除。或者，第一DU可以在基于该第一小区与第二小区的定时偏差，执行完相应操作(例如RACH配置或RACH优化等)之后，将其删除等。
本实施例所涉及的第一小区为第一DU下的小区，第二小区为第一小区的邻区，第二小区包括至少一个小区。这里所说的第二小区可以为第一DU下的小区，也可以为第一接入网设备的其他DU下的小区，也可以为第二接入网设备下的小区。以第二接入网设备为CU/DU架构为例，假定第二接入网设备包括第二CU和第二DU，其中，第二小区为第二DU下的小区。其中，第二接入网设备是不同于第一接入网设备的一个或者多个接入网设备。
上述所说的第一小区与第二小区的定时偏差是指两个小区在定时上的偏差。在本发明中，第一小区与第二小区的定时偏差可以是第一小区与第二小区的系统帧号和帧定时偏差(System frame number and Frame Timing Difference，SFTD)，或者，第一小区与第二小区的系统帧号和子帧定时偏差(System frame number and Subframe Timing Difference，SSTD)，还可以是其他时间单位的定时偏差等，具体与时间单位的划分粒度相关。例如，当时间单位包括时隙时，两个小区的定时偏差还可以是第一小区与第二小区的系统帧号和时隙定时偏差等。
以5G通信系统中时域上的时间单位包括帧和子帧为例，则第一小区与第二小区的定时 偏差可以描述为：在同一时刻，第一小区与第二小区的帧号偏差和帧边界偏差；或者，在同一时刻，第一小区与第二小区的帧号偏差、子帧号偏差和子帧边界偏差；或者，在同一时刻，第一小区与第二小区相对于同一帧的帧边界的时间偏差。
图13为又一种RACH时域资源示意图。如图13所示，假定第一小区在时刻x处于第n帧的第0个子帧的起始位置，第二小区在时刻x处于第n-2帧的第2个子帧的第4个符号上。则第一小区与第二小区的定时偏差例如可以如下述表3所示：
表3
Figure PCTCN2021074666-appb-000001
应理解，表3仅是一种示意，第一小区与第二小区的定时偏差的表达形式包括但不限于上述表3所示的方式。另外，当时间单位的粒度进行更细粒度的划分(例如符号、时隙等)，第一小区与第二小区的定时偏差可以采用其他的表达形式，本申请实施例对此不做限定。
本实施例不限定上述第一CU获取第一小区与第二小区的定时偏差的方式。例如，第一CU接收来自终端设备的第一小区与第二小区的定时偏差。可选的，该终端设备可以为同时位于第一小区和第二小区覆盖范围的终端设备。示例性的，第一CU可以向终端设备下发测量配置，以指示终端设备测量第一小区与第二小区的定时偏差。通过测量得到该定时偏差的终端设备可以通过测量报告，将该定时偏差发送给第一CU。可以理解，该获取第一小区与第二小区的定时偏差的方式可以适用于第二小区可以为第一DU下的小区，也可以为第一接入网设备的其他DU下的小区，也可以为第二接入网设备下的小区的场景。
再例如，第一CU可以基于内部实现，获取第一小区与第二小区的定时偏差。例如，第一CU可以监听第二小区的广播信号，并基于所监听到的第一小区的广播信号和第二小区的广播信号的时间差，获取第一小区与第二小区的定时偏差。
再例如，若第二小区为第二接入网设备下的小区，则第一CU可以接收来自第二接入网设备的第一小区与第二小区的定时偏差。以第二接入网设备为CU/DU架构为例，假定第二接入网设备包括第二CU和第二DU，第二小区为第二DU下的小区。则第一CU可以接收来自第二CU发送的第一小区与第二小区的定时偏差。应理解，在该场景下，第二接入网设备可以通过向终端设备发送测量配置的方式，获取终端设备测量的第一小区与第二小区的定 时偏差。或者，第二接入网设备可以基于自己内部实现，获取第一小区与第二小区的定时偏差，本实施例对此不进行限定。可选的，第二接入网设备可以在获取到该定时偏差时，将该定时偏差发送给第一CU，也可以与第一CU交互RACH配置时，将该定时偏差随第二小区的RACH配置一起发送给第一CU等。
在获取到第一小区与第二小区的定时偏差后，第一CU例如可以采用如下方式将第一小区与第二小区的定时偏差发送给第一DU：
实现方式1：第一CU可以在与第一DU进行F1接口建立的过程中，将第一小区与第二小区的定时偏差发送给第一DU。
图14为本申请实施例提供的另一种通信方法的流程示意图。如图14所示，上述步骤S802可以包括：
S1001、第一DU向第一CU发送F1建立请求消息。
相应地，第一CU接收该F1建立请求消息(F1setup request)。
S1002、第一CU向第一DU发送F1建立响应消息，该F1建立响应消息包括第一小区与第二小区的定时偏差。
相应地，第一DU接收该F1建立响应消息(F1setup response)。可选的，该F1建立响应消息也可以包括第二小区的RACH配置。
可选的，该F1建立响应消息还可以包括第一CU获取到的第一DU下的部分或所有小区与其各自的邻区的定时偏差。即，第一CU所获取到的第一DU下的多个小区中的每一个小区与该小区的至少一个邻区的定时偏差。可选的，该F1建立响应消息还可以包括这些小区的邻区的RACH配置。
示例性的，假定第一DU下有2个小区，分别为小区1和小区2。其中，小区1的邻区有小区4、小区5、小区6。小区2的邻区有小区7、小区8。上述F1建立响应消息可以包括如下定时偏差：小区1与小区4的定时偏差、小区1与小区5的定时偏差、小区1与小区6的定时偏差、小区2与小区7的定时偏差、小区2与小区8的定时偏差。
实现方式2：第一CU可以在获取到(例如初次获取到，或获取到更新的)第一小区与第二小区的定时偏差时，主动将第一小区与第二小区的定时偏差发送给第一DU，比如，通过CU配置更新消息发送给第一DU，或者新引入一个消息，通过这个新引入的消息发送给第一DU。下面以CU配置更新消息为例进行说明，但不限定于这个消息。
图15为本申请实施例提供的又一种通信方法的流程示意图。如图15所示，上述步骤S802可以包括：
S1101、第一CU向第一DU发送CU配置更新消息，该CU配置更新消息包括第一小区与第二小区的定时偏差。
相应地，第一DU接收该CU配置更新消息。
例如，第一CU可以在获取到第二小区更新的RACH配置后，通过CU配置更新消息将第一小区与第二小区的定时偏差发送给第一DU。可选的，该CU配置更新消息还可以包括第二小区更新后的RACH配置。
实现方式3：第一DU主动请求获取第一小区与第二小区的定时偏差。
图16为本申请实施例提供的又一种通信方法的流程图。如图16所示，上述步骤S802可以包括：
S1201、第一DU向第一CU发送请求消息，请求获取第一小区与第二小区的定时偏差，或请求获取第二小区的随机接入信道RACH配置。
相应地，第一CU接收该请求消息。
可以理解是，第一DU例如可以在认为第一小区潜在发生RACH配置冲突时，向第一CU发送该请求消息。例如，第一DU可以在基于终端设备上报的RACH报告中各终端设备执行随机接入的次数，认为第一小区潜在发生RACH配置冲突时，可以向第一CU发送该请求消息。可选的，该请求消息例如可以是RACH配置潜在冲突消息，或者RACH配置请求消息，或者，定时偏差请求消息等。此外，本申请实施例对该请求消息的名称不做限定，例如该请求消息可以为一条专用的请求消息。
S1202、第一CU基于该请求消息，向第一DU发送第一小区与第二小区的定时偏差。
在该实现方式下，该请求消息中可以携带有第一小区的标识，以通过该第一小区的标识指示第一CU发送哪个小区与邻区的定时偏差。这里所说的小区的标识例如可以包括小区的ID和/或小区频点信息等。在RACH优化的场景下，当该请求消息携带有第一小区的标识时，在一些实施例中，还可以将第一小区视为潜在发生RACH配置冲突的小区，或者，可能发生RACH配置冲突的小区等。
可选的，上述第一CU在基于第一DU的请求消息，向第一DU发送第一小区与第二小区的定时偏差时，还可以包括有第二小区的RACH配置。
若第一DU下存在多个小区、且该请求消息未携带任何小区的标识，则第一CU可以向第一DU发送第一CU获取到的第一DU下至少一个小区与其各自的邻区的定时偏差。即，第一DU下的多个小区中的每一个小区与该小区的(1个或多个)邻区的定时偏差。以RACH优化的场景为例，可选的，上述第一CU在基于第一DU的请求消息，向第一DU发送第一DU下至少一个小区与其各自的邻区的定时偏差时，还可以包括有该小区的邻区的RACH配置。
继续参照实现方式1所示的示例，若第一DU向第一CU发送的请求消息中携带有小区1的标识，则第一CU可以向第一DU发送如下定时偏差信息：小区1与小区4的定时偏差、小区1与小区5的定时偏差、小区1与小区6的定时偏差。若第一DU向第一CU发送的请求消息中未携带有任何小区的标识，则第一CU可以向第一DU发送如下定时偏差：小区1与小区4的定时偏差、小区1与小区5的定时偏差、小区1与小区6的定时偏差、小区2与小区7的定时偏差、小区2与小区8的定时偏差。
应理解，当上述三种实现方式中所描述的消息中未包括任何定时偏差时，第一DU可以认为第一小区与第二小区之间无定时偏差，或者说，第一小区与第二小区采用相同的定时。
另外，对于RACH配置场景下，上述三种实现方式仅是示例性的描述了第一CU如何将第一小区与第二小区的定时偏差，以及，第二小区的RACH配置发送给第一DU。本领域技术人员可以理解的是，第一小区与第二小区的定时偏差，以及，第二小区的RACH配置也可以通过上述三种实现方式中的不同消息传递给第一DU。例如，第一CU通过F1建立响应消息向第一DU发送第一小区与第二小区的定时偏差，通过CU配置更新消息将第二小区的RACH配置发送给第一DU。以此类推，不再一一列举。
上述实施例所涉及的第二小区的RACH配置例如可以采用如下方式获取：
若第二小区为第一CU下的其他DU的小区，则第一CU可以从其他DU获取到该第二小 区的RACH配置后，发送给第一DU。
若第二小区为第二接入网设备下的小区，则第一CU可以接收来自第二接入网设备的第二小区的RACH配置。
例如，在第一接入网设备与第二接入网设备建立Xn接口时，第一接入网设备的第一CU可以向第二接入网设备发送Xn建立请求消息。该Xn建立请求消息可以携带有第一接入网设备下的所有DU的小区的RACH配置。相应地，第二接入网设备向第一接入网设备发送Xn建立响应消息。该Xn建立响应消息可以携带有第二接入网设备下的小区的RACH配置。
或者，第二接入网设备向第一接入网设备的第一CU发送Xn建立请求消息。该Xn建立请求消息可以携带有第二接入网设备下的小区的RACH配置。相应地，第一接入网设备的第一CU向第二接入网设备发送Xn建立响应消息。该Xn建立响应消息可以携带有第一接入网设备下的所有DU的小区的RACH配置。
再例如，当第二接入网设备的配置发生改变时，比如新增至少一个小区，或一个或多个小区下的RACH配置发生改变时，则第二接入网设备可以通过NG-RAN节点配置更新消息向第一接入网设备的第一CU传递这些小区的RACH配置。
应理解，当上述第二接入网设备为CU/DU架构时，上述流程由第二接入网设备的CU与第一接入网设备的第一CU进行交互实现。
需要说明的是，上述所获取到的第二小区的RACH配置均是基于第二小区定时的RACH配置。
第一DU在获取到第一小区与第二小区的定时偏差，以及，第二小区的RACH配置后，第一DU可以根据第一小区与第二小区的定时偏差、第二小区的RACH配置，以及，第一小区的RACH配置，确定第一小区的RACH配置与第二小区的RACH配置是否冲突。此时，由于第一小区的RACH配置为基于第一小区定时的RACH配置，第二小区的RACH配置为基于第二小区定时的RACH配置。因此，第一DU可以基于第一小区与第二小区的定时偏差，将其中一个小区的RACH配置进行转换，以获取两个小区在基于同一定时下的RACH配置。
图17为又一种RACH时域资源示意图一，图18为又一种RACH时域资源示意图二。假定第一小区基于第一小区定时的RACH配置，以及，第二小区基于第二小区定时的RACH配置如图17所示。其中，填充有斜线的子帧为该小区上允许发送RACH的子帧。在该示例下，第一DU可以根据第一小区与第二小区的定时偏差，对第二小区的帧进行平移，以得到例如图18所示的第二小区基于第一小区定时的RACH配置。此时，第一小区与第二小区的RACH配置均基于第一小区的定时。或者，第一DU可以根据第一小区与第二小区的定时偏差，对第一小区的帧进行平移，以得到第一小区基于第二小区定时的RACH配置(图中未示出)。此时，第一小区与第二小区的RACH配置均基于第二小区的定时。
继续参照图17至图18，示例性的，以第一小区允许终端设备在每帧的第1个子帧和第7个子帧上发送RACH。第二小区允许终端设备在每帧的第2个子帧和第6个子帧上发送RACH为例。则在经过上述帧平移后，可以得出第一小区上允许发送RACH的子帧与第二小区上允许发送RACH的子帧在时间上重叠(部分重叠或者完全重叠)，因此，第一DU确定两个小区的RACH配置冲突。可选的，在该场景下，第一DU可以为第一小区重新设置(配置)RACH配置，以避免与第二小区的RACH配置冲突，从而保证终端设备随机接入第一小区的成功率和接入时延，以及，随机接入第二小区的成功率和接入时延。例如，第一DU 可以更改第一小区的部分或全部RACH配置的参数，从而避免与第二小区的RACH配置冲突。
应理解，若在经过上述帧平移后，第一小区上允许发送RACH的子帧与第二小区上允许发送RACH的子帧在时间上不重叠，则可以确认两个小区的RACH配置不冲突。在该场景下，第一DU可以不做任何处理。
可选的，在一些实施例中，若第一小区与第二小区均属于第一DU下的小区，则第一DU在确定第一小区与第二小区配置冲突时，可以为第二小区重新设置(配置)RACH配置，以避免与第一小区的RACH配置冲突。
若第二小区为第一接入网设备的其他DU下的小区，则第一DU可以通过第一CU向该DU发送指示信息，以指示第一小区与第二小区配置冲突，从而使该DU根据该指示信息，为第二小区重新设置(配置)RACH配置，以避免与第一小区的RACH配置冲突。
若第二小区为第二接入网设备下的小区，则第一DU可以通过第一CU向第二接入网设备发送该指示信息，以使第二接入网设备根据该指示信息，为第二小区重新设置(配置)RACH配置，以避免与第一小区的RACH配置冲突。以第二接入网设备为CU/DU架构为例，假定第二接入网设备包括第二CU和第二DU，其中，第二小区为第二DU下的小区。则在该示例下，第二CU可以接收第一CU发送的该指示信息，并转发给第二DU，由第二DU根据该指示信息，为第二小区重新设置(配置)RACH配置。
本实施例提供的方法，当接入网设备的DU下的小区与邻区采用不同的定时时，接入网设备的CU可以向DU发送DU下的小区与其邻区之间的定时偏差，从而使DU能够基于该定时偏差，准确地识别出该小区与邻区是否发生了RACH配置冲突，进而可以在发生冲突时，对该小区的RACH配置进行优化，从而确保终端设备随机接入的成功率和接入时延。
应理解，上述方法不仅可以用于对小区的RACH进行优化的场景，也可以适用于为小区进行RACH配置的场景，从而在初始为小区进行RACH配置时，即可规避与邻区RACH配置冲突的问题。
可以理解，虽然上述实施例均以RACH优化为例，对DU如何获取DU下的小区与其邻区的定时偏差进行了说明和介绍。但是，本领域技术人员可以理解的是，上述DU获取DU下的小区与其邻区的定时偏差的方式，包括但不限于上述RACH配置或RACH优化的场景，也可以适用于任一需要使用DU下的小区与其邻区的定时偏差的场景中。即，在DU获取到DU下的小区与其邻区的定时偏差后所执行的操作，本实施例并不限制。
前述实施例描述的是，第一CU将第一小区与第二小区的定时偏差发送给第一DU，由第一DU基于该定时偏差，以及，第一小区的RACH配置(基于第一小区的定时)，以及，第二小区的RACH配置(基于第二小区的定时)，判断两个小区的RACH配置是否冲突的过程。即，由第一DU基于该定时偏差，对其中一个小区的RACH配置进行转换，以在同一定时下对两个小区的RACH配置是否冲突进行判断。
下述实施例将从第一CU将第二小区的第一RACH配置(即基于第一小区定时的RACH配置)发送给第一DU的角度进行描述，由第一DU根据第一小区的RACH配置(即基于第一小区定时的RACH配置)，以及，第二小区的第一RACH配置，判断两个小区的RACH配置是否冲突。第一DU无需在对第二小区的RACH配置做处理。具体地：
图19为本申请实施例提供的又一种通信方法的流程示意图。如图19所示，该方法可以 包括：
S1401、第一CU获取第二小区的第一RACH配置。
其中，第二小区的第一RACH配置是基于第一小区的定时的。
S1402、第一CU向第一DU发送第二小区的第一RACH配置。
相应地，第一DU接收该第二小区的第一RACH配置。
S1403、第一DU保存第二小区的第一RACH配置。该步骤为可选的。例如，第一DU可以将第二小区的第一RACH配置进行保存，并在达到最大存储时长时，将其删除。或者，第一DU可以在接收到第一CU最新发送的该第二小区的第一RACH配置时，将前一次保存的该第二小区的第一RACH配置删除。或者，第一DU可以在基于该第二小区的第一RACH配置，执行完相应操作(例如RACH配置或RACH优化等)之后，将其删除等。
上述第一CU可以采用如下方式获取第二小区的第一RACH配置。例如：
方式A：第一CU在获取到第二小区的第二RACH配置(基于第二小区定时的RACH配置)后，将其转换为第二小区的第一RACH配置。在该实现方式下，第二小区可以是第一DU下的小区，也可以是第一接入网设备下其他DU的小区，也可以是第二接入网设备下的第二小区。
图20为本申请实施例提供的又一种通信方法的流程示意图。如图20所示，上述S1401可以包括：
S1501、第一CU获取第一小区与第二小区的定时偏差、第二小区的第二RACH配置。
关于第一CU如何获取第一小区与第二小区的定时偏差，以及，第二小区的第二RACH配置，可以参见前述实施例的描述。
S1502、第一CU根据第一小区与第二小区的定时偏差，将第二小区的第二RACH配置转换为第二小区的第一RACH配置。
关于第一CU如何将第二小区的第二RACH配置转换为第二小区的第一RACH配置，可以参见图17至图18所对应的示例的描述。
示例性的，第一DU有2个小区，分别为小区3和小区4，其中，小区3和小区4的邻区均为：小区1、小区2。
则第一CU可以执行如下操作：
根据小区3与小区1的定时偏差，生成小区1基于小区3定时的RACH配置；
根据小区3与小区2的定时偏差，生成小区2基于小区3定时的RACH配置；
根据小区4与小区1的定时偏差，生成小区1基于小区4定时的RACH配置；
根据小区4与小区2的定时偏差，生成小区2基于小区4定时的RACH配置。
需要说明的是，由于邻区关系是小区级的，不是基站级的。以第二接入网设备为例，假定第二接入网设备与第一接入网设备相邻，上述小区1和小区2均属于第二接入网设备下的小区。若该小区1不是小区3的邻接小区，只有小区2是小区3的邻接小区，则对于小区3来说，第一CU无需生成小区1基于小区3定时的RACH配置，也需向第一DU发送小区1基于小区3定时的RACH配置。即，第一CU仅对存在实际邻接关系的小区执行上述RACH配置转换操作。
可选地，在一些实施例中，针对第一小区邻接的部分或全部第二小区，第一CU可能没有可用的第一小区与这些小区的定时偏差(即第一CU没有第一小区与这些小区的定时偏差， 或者，第一CU没有获取到第一小区与这些小区的定时偏差)。在该场景下，第一CU可以不执行这些小区的RACH配置转换操作。在另一些实施例中，若第一CU获取到的第一小区与第二小区的定时偏差为0时，说明第一小区与第二小区“时间”同步，例如，第一小区与第二小区的帧号同步，且帧边界对齐。则在该场景下，第一CU无需执行第二小区的RACH配置转换操作，直接将该第二小区的第二RACH配置作为第二小区的第一RACH配置即可。
方式B：对于第二接入网设备下的第二小区，第一CU可以接收来自第二接入网设备的第二小区的第一RACH配置。
在本实施例中，第二接入网设备在向第一接入网设备的第一CU发送第二小区的RACH配置之前，可以根据第一小区与第二小区的定时偏差，将第二小区的第二RACH配置(即基于第二小区定时的RACH配置)转换为第二小区的第一RACH配置。
关于接入网设备之间如何交互小区的RACH配置，可以参见前述实施例的描述。关于第二接入网设备如何获取第一小区与第二小区的定时偏差，以及，如何基于该定时偏差，将第二小区的第二RACH配置转换为第二小区的第一RACH配置，可以参见方式A的描述。
可选地，在一些实施例中，第二接入网设备可能没有可用的第一小区与第二小区的定时偏差(即第二接入网设备没有第一小区与第二小区的定时偏差，或者，第二接入网设备没有获取到第一小区与第二小区的定时偏差))。在该场景下，第二接入网设备可以不执行该RACH配置转换操作，而是将第二小区的第二RACH配置发送给第一CU。在另一些实施例中，若第二接入网设备获取到的第一小区与第二小区的定时偏差为0时，说明第一小区与第二小区“时间”同步，例如，第一小区与第二小区的帧号同步，且帧边界对齐。则在该场景下，第二接入网设备无需执行第二小区的RACH配置转换操作，直接将该第二小区的第二RACH配置作为第二小区的第一RACH配置即可。
可选的，在该实现方式下，第二接入网设备在向第一CU发送第二小区的RACH配置时，还可以携带有第一指示信息，该第一指示信息用于第一接入网设备确定该第二小区的RACH配置是否为基于第一小区定时的RACH配置。这样，第一CU在接收到第二接入网设备发送的第二小区的RACH配置后，可以基于该第一指示信息，获知该第二小区的RACH配置是否为基于第一小区定时的RACH配置。
例如，该第一指示信息可以通过1比特的字域来实现，当该字域取值为1时，表示该第二小区的RACH配置为基于第二小区定时的RACH配置，当该字域取值为0时，表示该第二小区的RACH配置为基于第一小区定时的RACH配置。或者，当该字域取值为0时，表示该第二小区的RACH配置为基于第二小区定时的RACH配置，当该字域取值为1时，表示该第二小区的RACH配置为基于第一小区定时的RACH配置。
再例如，还可以在发送第二小区的RACH配置时，通过是否携带该第一指示信息来实现，比如当携带该第一指示信息时，表示该第二小区的RACH配置为基于第二小区定时的RACH配置，当没有携带该第一指示信息时，表示该第二小区的RACH配置为基于第一小区定时的RACH配置。或者，当携带该第一指示信息时，表示该第二小区的RACH配置为基于第一小区定时的RACH配置，当没有携带该第一指示信息时，表示该第二小区的RACH配置为基于第二小区定时的RACH配置。
当然，第一指示信息也可以采用其他的方式指示第二小区的RACH配置是否为基于第一小区定时的RACH配置。
应理解，当上述第二接入网设备为CU/DU架构时，上述流程由第二接入网设备的CU与第一接入网设备的第一CU进行交互实现。
需要说明的是，方式B所提供的实现方式，包括但不限于第一接入网设备为CU/DU架构的场景，同样也适用于非CU/DU架构的场景。
在获取到第二小区的第一RACH配置后，第一CU例如可以采用如下方式将第二小区的第一RACH配置发送给第一DU：
实现方式1：第一CU可以在与第一DU进行F1接口建立时，将第二小区的第一RACH配置发送给第一DU。
图21为本申请实施例提供的又一种通信方法的流程示意图。如图21所示，上述步骤S1402可以包括：
S1601、第一DU向第一CU发送F1建立请求消息。
相应地，第一CU接收该F1建立请求消息(F1setup request)。
S1602、第一CU向第一DU发送F1建立响应消息，该F1建立响应消息包括第二小区的第一RACH配置。
相应地，第一DU接收该F1建立响应消息(F1setup response)。
可选的，该F1建立响应消息还可以包括第一CU获取到的第一DU下的部分或所有小区的邻区基于该小区定时的RACH配置。即，第一CU所获取到的第一DU下的多个小区中的每一个小区的至少一个邻区基于该小区定时的RACH配置。
实现方式2：第一CU可以在与第一DU进行CU配置更新时，将第二小区的第一RACH配置发送给第一DU。
图22为本申请实施例提供的又一种通信方法的流程示意图。如图22所示，上述步骤S1402可以包括：
S1701、第一CU向第一DU发送CU配置更新消息，该CU配置更新消息包括第二小区的第一RACH配置。
相应地，第一DU接收该CU配置更新消息。
实现方式3：第一DU主动请求获取第二小区的第一RACH配置。
图23为本申请实施例提供的又一种通信方法的流程图。如图23所示，上述步骤S1402可以包括：
S1801、第一DU向第一CU发送请求消息，请求获取第二小区的随机接入信道RACH配置。
相应地，第一CU接收该请求消息。
可以理解是，第一DU例如可以在认为第一小区潜在发生RACH配置冲突时，向第一CU发送该请求消息。例如，第一DU可以在基于终端设备上报的RACH报告中各终端设备执行随机接入的次数，认为第一小区潜在发生RACH配置冲突时，可以向第一CU发送该请求消息。可选的，该请求消息例如可以是RACH配置潜在冲突消息，或者RACH配置请求消息等。此外，本申请实施例对该请求消息的名称不做限定，例如该请求消息可以为一条专用的请求消息。
S1802、第一CU基于该请求消息，向第一DU发送第二小区的第一RACH配置。
在该实现方式下，该请求消息中可以携带有第一小区的标识，以通过该第一小区的标 识指示第一CU发送哪个小区的邻区基于该小区定时的RACH配置。这里所说的小区的标识例如可以为小区的ID和/或小区频点信息等。在RACH优化的场景下，当该请求消息携带有第一小区的标识时，在一些实施例中，还可以将第一小区视为潜在发生RACH配置冲突的小区，或者，可能发生RACH配置冲突的小区等。
若第一DU下存在多个小区、且该请求消息未携带任何小区的标识，则第一CU可以向第一DU发送第一CU获取到的第一DU下的小区的邻区基于该小区定时的RACH配置。即，第一CU所获取到的第一DU下的多个小区中的每一个小区的至少一个邻区基于该小区定时的RACH配置。
需要说明的是，在一些实施例中，第一CU所获取到的一些第二小区的RACH配置并非是基于第一小区定时的RACH配置(具体可以参见前述方式A和方式B中关于无第一小区与第二小区的定时偏差时所得到的第二小区的RACH配置的描述)。在该情况下，第一CU可以不向第一DU发送这些没有基于第一小区定时的第二小区的RACH配置，即只发送基于第一小区定时的第二小区的RACH配置。或者，第一CU在向第一DU发送第二小区的RACH配置时，还可以携带有第二指示信息，该第二指示信息第一DU确定该第二小区的RACH配置是否为基于第一小区定时的RACH配置。这样，第一DU在接收到第一CU发送的第二小区的RACH配置后，可以基于该第二指示信息，获知该第二小区的RACH配置是否为基于第一小区定时的RACH配置。可选的，第二指示信息可以是基于第一指示信息得到的，例如是将第一指示信息作为第二指示信息透传给第一DU，或者也可以对第一指示信息处理后作为第二指示信息发送给第一DU。或者，第二指示信息可以是第一CU根据第二小区的RACH是否为基于第一小区定时的RACH配置生成的指示信息。
例如，该第二指示信息可以通过1比特的字域来实现，当该字域取值为1时，表示该第二小区的RACH配置为基于第二小区定时的RACH配置，当该字域取值为0时，表示该第二小区的RACH配置为基于第一小区定时的RACH配置。或者，当该字域取值为0时，表示该第二小区的RACH配置为基于第二小区定时的RACH配置，当该字域取值为1时，表示该第二小区的RACH配置为基于第一小区定时的RACH配置。
再例如，还可以在发送第二小区的RACH配置时，通过是否携带该第二指示信息来实现，比如当携带该第二指示信息时，表示该第二小区的RACH配置为基于第二小区定时的RACH配置，当没有携带该第二指示信息时，表示该第二小区的RACH配置为基于第一小区定时的RACH配置。或者，当携带该第二指示信息时，表示该第二小区的RACH配置为基于第一小区定时的RACH配置，当没有携带该第二指示信息时，表示该第二小区的RACH配置为基于第二小区定时的RACH配置。
当然，第二指示信息也可以采用其他的方式指示第二小区的RACH配置是否为基于第一小区定时的RACH配置。
对应于前述图21至图23的场景中，第一CU向第一DU所发送的消息中，例如可以携带该第二指示信息，以指示该消息中所携带的第二小区的RACH配置是否为基于第一小区定时的RACH配置。
在本实施例中，第一DU在获取第二小区的第一RACH配置后，第一DU可以根据第二小区的第一RACH配置(即基于第一小区定时的RACH配置)，以及，第一小区的RACH配置(即基于第一小区定时的RACH配置)，确定第一小区的RACH配置与第二小区的第一 RACH配置是否冲突。此时，由于两个小区的RACH配置是基于同一定时的RACH配置。因此，第一DU可以准确地识别出两个小区的RACH配置是否存在冲突。
若存在冲突(例如第一小区上允许发送RACH的子帧与第二小区上允许发送RACH的子帧在时间上部分重叠或者完全重叠)，则第一DU可以为第一小区重新设置(配置)RACH配置，以避免与第二小区的RACH配置冲突，从而保证终端设备随机接入第一小区的成功率和接入时延，以及，随机接入第二小区的成功率和接入时延。若不存在冲突(例如第一小区上允许发送RACH的子帧与第二小区上允许发送RACH的子帧在时间上不重叠)，则第一DU可以不做任何处理。
可选的，在一些实施例中，若第一小区与第二小区均属于第一DU下的小区，则第一DU在确定第一小区与第二小区配置冲突时，可以为第二小区重新设置(配置)RACH配置，以避免与第一小区的RACH配置冲突。
若第二小区为第一接入网设备的其他DU下的小区，则第一DU可以通过第一CU向该DU发送指示信息，以指示第一小区与第二小区配置冲突，从而使该DU根据该指示信息，为第二小区重新设置(配置)RACH配置，以避免与第一小区的RACH配置冲突。
若第二小区为第二接入网设备下的小区，则第一DU可以通过第一CU向第二接入网设备发送该指示信息，以使第二接入网设备根据该指示信息，为第二小区重新设置(配置)RACH配置，以避免与第一小区的RACH配置冲突。以第二接入网设备为CU/DU架构为例，假定第二接入网设备包括第二CU和第二DU，其中，第二小区为第二DU下的小区。则在该示例下，第二CU可以接收第一CU发送的该指示信息，并转发给第二DU，由第二DU根据该指示信息，为第二小区重新设置(配置)RACH配置。
本实施例提供的方法，当接入网设备的DU下的小区与邻区采用不同的定时时，接入网设备的CU可以向DU发送DU下的小区的邻区基于该小区定时的RACH配置，从而使DU能够基于在同一定时下的两个小区的RACH配置，准确地识别出该小区与邻区是否发生了RACH配置冲突，进而可以在发生冲突时，对该小区的RACH配置进行优化，从而确保终端设备随机接入的成功率和接入时延。
应理解，上述方法不仅可以用于对小区的RACH进行优化的场景，也可以适用于为小区进行RACH配置的场景，从而在初始为小区进行RACH配置时，即可规避与邻区RACH配置冲突的问题。
可以理解的是，上述各个方法实施例中，由CU实现的操作或者步骤，也可以由可以配置于CU的部件(例如芯片或者电路)实现，由DU实现的操作或者步骤，也可以由可以配置于DU的部件(例如芯片或者电路)实现，由接入网设备实现的操作或者步骤，也可以由可以配置于接入网设备的部件(例如芯片或者电路)实现。
图24为本申请实施例提供的一种通信装置的结构示意图。可以理解的是，该通信装置可以对应实现前述各个方法实施例中对应第一CU的操作或者步骤。该通信装置可以是CU或者可以是可配置于CU的部件。如图24所示，该通信装置可以包括：处理模块11、发送模块12。可选的，在一些实施例中，该通信装置还可以包括：第一接收模块13和/或第二接收模块14。
在一种可能的实现方式中，处理模块11，用于获取第一小区与第二小区的定时偏差。其中，第一小区为DU下的小区，第二小区为第一小区的邻接小区，该CU和该DU均属 于第一接入网设备。上述第一小区与第二小区的定时偏差是指两个小区在定时上的偏差。例如可以包括：第一小区与第二小区的帧号偏差和帧边界偏差；或者，第一小区与第二小区的帧号偏差、子帧号偏差和子帧边界偏差；或者，第一小区与第二小区相对于同一帧的帧边界的时间偏差等。示例性的，处理模块11，具体用于通过第二接收模块14接收的来自终端设备的第一小区与第二小区的定时偏差来获取第一小区与第二小区的定时偏差。此时，处理模块11和第二接收模块14也可以集成为处理模块11或者第二接收模块14。或者，当第二小区为第二接入网设备下的小区时，处理模块11，具体用于通过第二接收模块14接收的来自第二接入网设备的第一小区与第二小区的定时偏差来获取第一小区与第二小区的定时偏差。此时，处理模块11和第二接收模块14也可以集成为处理模块11或者第二接收模块14。
发送模块12，用于向DU发送第一小区与第二小区的定时偏差。
例如，第一接收模块13，用于接收来自DU的请求消息。该请求消息请求获取第一小区与第二小区的定时偏差，或请求获取第二小区的随机接入信道RACH配置。相应地，发送模块12，具体用于基于请求消息，向DU发送第一小区与第二小区的定时偏差。可选的，请求消息携带有第一小区的标识。
或者，第一接收模块13，用于接收来自DU的F1建立请求消息。相应地，发送模块12，具体用于向DU发送F1建立响应消息，F1建立响应消息包括第一小区与第二小区的定时偏差；或者，发送模块12，具体用于向DU发送CU配置更新消息，CU配置更新消息包括第一小区与第二小区的定时偏差。
本实施例提供的通信装置，可以执行上述图12所对应的方法实施例中第一CU的动作，其实现原理和技术效果类似，在此不再赘述。可选的，上述第一CU中还可以包括至少一个存储模块，该存储模块可以包括数据和/或指令，处理模块和/或收发模块(或者第一接收模块、第二接收模块和发送模块)可以读取存储模块中的数据和/或指令，实现对应的方法。
在另一可能的实现方式中，处理模块11，用于获取第二小区的第一RACH配置。其中，第二小区的第一RACH配置是基于第一小区的定时的。第一小区为分布式单元DU下的小区，第二小区为第一小区的邻接小区，CU和DU均属于第一接入网设备。
例如，处理模块11，可以用于获取第一小区与第二小区的定时偏差、第二小区的第二RACH配置，并根据第一小区与第二小区的定时偏差，将第二小区的第二RACH配置转换为第二小区的第一RACH配置。该第二小区的第二RACH配置是基于第二小区定时的。
上述第一小区与第二小区的定时偏差是指两个小区在定时上的偏差。例如可以包括：第一小区与第二小区的帧号偏差和帧边界偏差；或者，第一小区与第二小区的帧号偏差、子帧号偏差和子帧边界偏差；或者，第一小区与第二小区相对于同一帧的帧边界的时间偏差等。示例性的，处理模块11，可以通过第一接收模块13接收的来自终端设备的第一小区与第二小区的定时偏差来获取第一小区与第二小区的定时偏差。此时，处理模块11和第一接收模块13也可以集成为处理模块11或者第一接收模块13。或者，在第二小区为第二接入网设备下的小区时，处理模块11，可以通过第一接收模块13接收的来自第二接入网设备的第一小区与第二小区的定时偏差来获取第一小区与第二小区的定时偏差。此时，处理模块11和第一接收模块13也可以集成为处理模块11或者第一接收模块13。
再例如，当第二小区为第二接入网设备下的小区时，处理模块11，可以通过第一接收模块13接收来自第二接入网设备的第二小区的第一RACH配置。作为一种可能的实现方式，处理模块11，可以通过第一接收模块13接收来自第二接入网设备的第二小区的RACH配置，以及，第一指示信息，第一指示信息指示第二小区的RACH配置为基于第一小区定时的RACH配置。
发送模块12，用于向DU发送第二小区的第一RACH配置。
例如，第二接收模块14，用于接收来自DU的请求消息，该请求消息请求获取第二小区的RACH配置。相应地，发送模块12，具体用于基于请求消息，向DU发送第二小区的第一RACH配置。可选的，请求消息携带有第一小区的标识。
或者，第二接收模块14，用于接收来自DU的F1建立请求消息。相应地，发送模块12，具体用于向DU发送F1建立响应消息，F1建立响应消息包括第二小区的第一RACH配置。
或者，发送模块12，具体用于向DU发送CU配置更新消息，CU配置更新消息包括第二小区的第一RACH配置。
可选的，发送模块12，具体用于向DU发送第二小区的RACH配置，以及，第二指示信息。其中，第二指示信息指示第二小区的RACH配置为基于第一小区定时的RACH配置。
上述第一接收模块、第二接收模块和发送模块可以集成在收发模块，也可以分离。
本实施例提供的通信装置，可以执行上述图19所对应的方法实施例中第一CU的动作，其实现原理和技术效果类似，在此不再赘述。可选的，上述第一CU中还可以包括至少一个存储模块，该存储模块可以包括数据和/或指令，处理模块和/或收发模块(或者第一接收模块、第二接收模块和发送模块)可以读取存储模块中的数据和/或指令，实现对应的方法。
图25为本申请实施例提供的另一种通信装置的结构示意图。可以理解的是，该通信装置可以对应实现前述各个方法实施例中对应第一DU的操作或者步骤。该通信装置可以是DU或者可以是可配置于DU的部件。如图25所示，该通信装置可以包括：接收模块21和存储模块22。可选的，在一些实施例中，该通信装置还可以包括：处理模块23。
在一种可能的实现方式中，接收模块21，用于接收来自集中式单元CU的第一小区与第二小区的定时偏差。其中，第一小区为DU下的小区，第二小区为第一小区的邻接小区，CU和DU均属于第一接入网设备。存储模块22，用于保存第一小区与第二小区的定时偏差。
在该实现方式下，在一些实施例中，接收模块21，还用于接收来自CU的第二小区的随机接入信道RACH配置。相应地，处理模块23，用于根据第一小区与第二小区的定时偏差、第二小区的RACH配置，以及，第一小区的RACH配置，确定第一小区的RACH配置与第二小区的RACH配置是否冲突。在该实现方式下，处理模块23，还可以用于在第一小区的RACH配置与第二小区的RACH配置冲突时，为第一小区重新设置RACH配置。
本实施例提供的通信装置，可以执行上述图12所对应的方法实施例中第一DU的动作，其实现原理和技术效果类似，在此不再赘述。可选的，上述第一DU中还可以包括至少一 个存储模块，该存储模块可以包括数据和/或指令，处理模块和/或收发模块(或者接收模块)可以读取存储模块中的数据和/或指令，实现对应的方法。
在另一可能的实现方式中，接收模块21，用于接收来自集中式单元CU的第二小区的第一RACH配置。其中，第二小区的第一RACH配置是基于第一小区的定时的，第一小区为DU下的小区，第二小区为第一小区的邻接小区，CU和DU均属于第一接入网设备。存储模块22，用于保存第二小区的第一RACH配置。
在该实现方式下，在一些实施例中，处理模块23，用于根据第二小区的第一RACH配置，以及，第一小区的RACH配置，确定第一小区的RACH配置与第二小区的第一RACH配置是否冲突。在该实现方式下，处理模块23，还用于在第一小区的RACH配置与第二小区的第一RACH配置冲突时，为第一小区重新设置RACH配置。
本实施例提供的通信装置，可以执行上述图19所对应的方法实施例中第一DU的动作，其实现原理和技术效果类似，在此不再赘述。可选的，上述第一DU中还可以包括至少一个存储模块，该存储模块可以包括数据和/或指令，处理模块和/或收发模块(或者接收模块)可以读取存储模块中的数据和/或指令，实现对应的方法。
图26为本申请实施例提供的又一种通信装置的结构示意图。可以理解的是，该通信装置可以对应实现前述各个方法实施例中对应第二接入网设备的操作或者步骤。该通信装置可以是第二接入网设备或者可以是可配置于第二接入网设备的部件，或者，可以是第二接入网设备的CU或者可以是可配置与第二接入网设备的CU的部件。如图26所示，该通信装置可以包括：处理模块31和发送模块32。可选的，在一些实施例中，该通信装置还可以包括：接收模块33。
处理模块31，用于获取第二小区的第一RACH配置；其中，第二小区的第一RACH配置是基于第一小区的定时的，第二小区为第二接入网设备下的小区，第一小区为分布式单元DU下的小区，第二小区为第一小区的邻接小区，CU和DU均属于第一接入网设备。
例如，处理模块31，可以用于获取第一小区与第二小区的定时偏差、第二小区的第二RACH配置，并根据第一小区与第二小区的定时偏差，将第二小区的第二RACH配置转换为第二小区的第一RACH配置。该第二小区的第二RACH配置是基于第二小区定时的。
上述第一小区与第二小区的定时偏差是指两个小区在定时上的偏差。例如可以包括：第一小区与第二小区的帧号偏差和帧边界偏差；或者，第一小区与第二小区的帧号偏差、子帧号偏差和子帧边界偏差；或者，第一小区与第二小区相对于同一帧的帧边界的时间偏差等。示例性的，处理模块31，可以通过接收模块33接收的来自终端设备的第一小区与第二小区的定时偏差来获取第一小区与第二小区的定时偏差。此时，处理模块31和接收模块33也可以集成为处理模块31或者接收模块33。或者，处理模块31，可以通过接收模块33接收的来自CU的第一小区与第二小区的定时偏差来获取第一小区与第二小区的定时偏差。此时，处理模块31和接收模块33也可以集成为处理模块31或者接收模块33。
发送模块32，用于向CU发送第二小区的第一RACH配置。例如，发送模块32，具体用于向CU发送第二小区的RACH配置，以及，第一指示信息，第一指示信息指示第二小区的RACH配置为基于第一小区定时的RACH配置。
本实施例提供的通信装置，可以执行上述图19所对应的方法实施例中第二接入网设备的动作，其实现原理和技术效果类似，在此不再赘述。可选的，上述第二接入网设备中 还可以包括至少一个存储模块，该存储模块可以包括数据和/或指令，处理模块和/或收发模块(或者接收模块、发送模块)可以读取存储模块中的数据和/或指令，实现对应的方法。
需要说明的是，应理解以上各个实施例中发送模块实际实现时可以为发送器，接收模块实际实现时可以为接收器，或者，发送模块和接收模块通过收发器实现，或者，发送模块和接收模块通过通信端口实现。而处理模块可以以软件通过处理元件调用的形式实现；也可以以硬件的形式实现。例如，处理模块可以为至少一个单独设立的处理元件，也可以集成在上述CU或DU的某一个芯片中实现，此外，也可以以程序代码的形式存储于上述CU或DU的存储器中，由上述CU或DU的某一个处理元件调用并执行以上处理模块的功能。此外这些模块全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件可以是一种集成电路，具有信号的处理能力。在实现过程中，上述方法的各步骤或以上各个模块可以通过处理器元件中的硬件的集成逻辑电路或者软件形式的指令完成。
例如，以上这些模块可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个专用集成电路(application specific integrated circuit，ASIC)，或，一个或多个微处理器(digital signal processor，DSP)，或，一个或者多个现场可编程门阵列(field programmable gate array，FPGA)等。再如，当以上某个模块通过处理元件调度程序代码的形式实现时，该处理元件可以是通用处理器，例如中央处理器(central processing unit，CPU)或其它可以调用程序代码的处理器。再如，这些模块可以集成在一起，以片上系统(system-on-a-chip，SOC)的形式实现。
图27为本申请实施例提供的又一种通信装置的结构示意图。如图27所示，该通信装置可以包括：至少一个处理器41(例如CPU)、至少一个存储器42。图26是以一个处理器41和一个存储器42为例的示意图。存储器42可能包含高速随机存取存储器(random-access memory，RAM)，也可能还包括非易失性存储器(non-volatile memory，NVM)，例如至少一个磁盘存储器，存储器42中可以存储各种指令和/或数据，以用于完成各种处理功能以及实现本申请的方法步骤。可选的，本申请涉及的通信装置还可以包括：电源43、通信总线44以及通信端口45。通信总线44用于实现元件之间的通信连接。上述通信端口45用于实现通信装置与其他外设之间进行连接通信。
一些可能的实现方式中，上述存储器42用于存储计算机可执行程序代码，程序代码包括指令；当处理器41执行指令时，指令使通信装置的处理器41执行上述方法实施例中第一CU的动作，其实现原理和技术效果类似，在此不再赘述。或者，
一些可能的实现方式中，上述存储器42用于存储计算机可执行程序代码，程序代码包括指令；当处理器41执行指令时，指令使通信装置的处理器41执行上述方法实施例中第一DU的动作，其实现原理和技术效果类似，在此不再赘述。或者，
一些可能的实现方式中，上述存储器42用于存储计算机可执行程序代码，程序代码包括指令；当处理器41执行指令时，指令使通信装置的处理器41执行上述方法实施例中第二接入网设备的动作，其实现原理和技术效果类似，在此不再赘述。
本申请实施例还提供一种计算机可读存储介质，其上存储有用于实现上述方法实施例中由第一DU执行的方法，或由第一CU或者第二接入网设备执行的方法的计算机指令。
例如，该计算机指令被执行时，使得通信装置可以实现上述方法实施例中第一DU执行的方法、或者、第一CU执行的方法、或者、第二接入网设备执行的方法。
本申请实施例还提供一种包含指令的计算机程序产品，该指令被执行时使得该计算机实现上述方法实施例中由第一DU执行的方法，或由第一CU执行的方法，或由第二接入网设备执行的方法。
本申请实施例还提供一种通信系统，该通信系统包括上文实施例中的包括第一CU和第一DU的第一接入网设备，和/或第二接入网设备。
作为一个示例，该通信系统包括：上文结合图12、图14至图16中任一描述的实施例中的第一CU和第一DU。
作为另一示例，该通信系统包括：上文结合图19至图23中任一描述的实施例中的第一CU和第一DU。
作为另一个示例，该通信系统包括：上文结合图24描述的通信装置、图25描述的通信装置。
作为另一示例，该通信系统包括：上文结合图26或图27所描述的通信装置。
作为另一示例，该通信系统包括：上文结合图24描述的通信装置、图25描述的通信装置，以及，图26描述的通信装置。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例的流程或功能。计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Drive(SSD))等。
本文中的术语“多个”是指两个或两个以上。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系；在公式中，字符“/”，表示前后关联对象是一种“相除”的关系。
可以理解的是，在本申请的实施例中涉及的各种数字编号仅为描述方便进行的区分，并不用来限制本申请的实施例的范围。
可以理解的是，在本申请的实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请的实施例的实施过程构成任何限定。

Claims (31)

  1. 一种通信方法，其特征在于，所述方法包括：
    集中式单元CU获取第一小区与第二小区的定时偏差；其中，所述第一小区为分布式单元DU下的小区，所述第二小区为所述第一小区的邻接小区，所述CU和所述DU均属于第一接入网设备；
    所述CU向所述DU发送所述第一小区与所述第二小区的定时偏差。
  2. 根据权利要求1所述的方法，其特征在于，所述第一小区与所述第二小区的定时偏差，包括：
    所述第一小区与所述第二小区的帧号偏差和帧边界偏差；或者，
    所述第一小区与所述第二小区的帧号偏差、子帧号偏差和子帧边界偏差；或者，
    所述第一小区与所述第二小区相对于同一帧的帧边界的时间偏差。
  3. 根据权利要求1或2所述的方法，其特征在于，所述CU向所述DU发送所述第一小区与所述第二小区的定时偏差，包括：
    所述CU接收来自所述DU的请求消息，所述请求消息请求获取所述第一小区与所述第二小区的定时偏差，或请求获取所述第二小区的随机接入信道RACH配置；
    所述CU基于所述请求消息，向所述DU发送所述第一小区与所述第二小区的定时偏差。
  4. 根据权利要求3所述的方法，其特征在于，所述请求消息携带有所述第一小区的标识。
  5. 根据权利要求1或2所述的方法，其特征在于，所述CU向所述DU发送所述第一小区与所述第二小区的定时偏差，包括：
    所述CU接收来自所述DU的F1建立请求消息；
    所述CU向所述DU发送F1建立响应消息，所述F1建立响应消息包括所述第一小区与所述第二小区的定时偏差；
    或者，
    所述CU向所述DU发送CU配置更新消息，所述CU配置更新消息包括所述第一小区与所述第二小区的定时偏差。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述CU获取所述第一小区与所述第二小区的定时偏差，包括：
    所述CU接收来自终端设备的所述第一小区与所述第二小区的定时偏差；或者，
    所述CU接收来自第二接入网设备的所述第一小区与所述第二小区的定时偏差，其中，所述第二小区为所述第二接入网设备下的小区。
  7. 一种通信方法，其特征在于，所述方法包括：
    分布式单元DU接收来自集中式单元CU的第一小区与第二小区的定时偏差；其中，所述第一小区为所述DU下的小区，所述第二小区为所述第一小区的邻接小区，所述CU和所述DU均属于第一接入网设备；
    所述DU保存所述第一小区与所述第二小区的定时偏差。
  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：
    所述DU接收来自所述CU的所述第二小区的随机接入信道RACH配置；
    所述DU根据所述第一小区与所述第二小区的定时偏差、所述第二小区的RACH配置，以及，所述第一小区的RACH配置，确定所述第一小区的RACH配置与所述第二小区的RACH配置是否冲突。
  9. 根据权利要求8所述的方法，其特征在于，所述方法还包括：
    若所述第一小区的RACH配置与所述第二小区的RACH配置冲突，则所述DU为所述第一小区重新设置RACH配置。
  10. 一种通信方法，其特征在于，所述方法包括：
    集中式单元CU获取第二小区的第一RACH配置；其中，所述第二小区的第一RACH配置是基于第一小区的定时的，所述第一小区为分布式单元DU下的小区，所述第二小区为所述第一小区的邻接小区，所述CU和所述DU均属于第一接入网设备；
    所述CU向所述DU发送所述第二小区的第一RACH配置。
  11. 根据权利要求10所述的方法，其特征在于，所述CU获取所述第二小区的第一RACH配置，包括：
    所述CU获取所述第一小区与所述第二小区的定时偏差、所述第二小区的第二RACH配置，所述第二小区的第二RACH配置是基于第二小区定时的；
    所述CU根据所述第一小区与所述第二小区的定时偏差，将所述第二小区的第二RACH配置转换为所述第二小区的第一RACH配置。
  12. 根据权利要求11所述的方法，其特征在于，所述第一小区与所述第二小区的定时偏差，包括：
    所述第一小区与所述第二小区的帧号偏差和帧边界偏差；或者，
    所述第一小区与所述第二小区的帧号偏差、子帧号偏差和子帧边界偏差；或者，
    所述第一小区与所述第二小区相对于同一帧的帧边界的时间偏差。
  13. 根据权利要求11或12所述的方法，其特征在于，所述CU获取所述第一小区与所述第二小区的定时偏差，包括：
    所述CU接收来自终端设备的所述第一小区与所述第二小区的定时偏差；或者，
    所述CU接收来自第二接入网设备的所述第一小区与所述第二小区的定时偏差；其中，所述第二小区为所述第二接入网设备下的小区。
  14. 根据权利要求10所述的方法，其特征在于，所述CU获取所述第二小区的第一RACH配置，包括：
    所述CU接收来自第二接入网设备的所述第二小区的第一RACH配置；其中，所述第二小区为所述第二接入网设备下的小区。
  15. 根据权利要求14所述的方法，其特征在于，所述CU接收来自所述第二接入网设备的所述第二小区的第一RACH配置，包括：
    所述CU接收来自所述第二接入网设备的所述第二小区的RACH配置，以及，第一指示信息，所述第一指示信息指示所述第二小区的RACH配置为基于所述第一小区定时的RACH配置。
  16. 根据权利要求10-15任一项所述的方法，其特征在于，所述CU向所述DU发送所述第二小区的第一RACH配置，包括：
    所述CU向所述DU发送所述第二小区的RACH配置，以及，第二指示信息；其中，所述第二指示信息指示所述第二小区的RACH配置为基于所述第一小区定时的RACH配置。
  17. 根据权利要求10-16任一项所述的方法，其特征在于，所述CU向所述DU发送所述第二小区的第一RACH配置，包括：
    所述CU接收来自所述DU的请求消息，所述请求消息请求获取所述第二小区的RACH配置；
    所述CU基于所述请求消息，向所述DU发送所述第二小区的第一RACH配置。
  18. 根据权利要求17所述的方法，其特征在于，所述请求消息携带有所述第一小区的标识。
  19. 根据权利要求10-16任一项所述的方法，其特征在于，所述CU向所述DU发送所述第二小区的第一RACH配置，包括：
    所述CU接收来自所述DU的F1建立请求消息；
    所述CU向所述DU发送F1建立响应消息，所述F1建立响应消息包括所述第二小区的第一RACH配置；
    或者，
    所述CU向所述DU发送CU配置更新消息，所述CU配置更新消息包括所述第二小区的第一RACH配置。
  20. 一种通信方法，其特征在于，所述方法包括：
    分布式单元DU接收来自集中式单元CU的第二小区的第一RACH配置；其中，所述第二小区的第一RACH配置是基于第一小区的定时的，所述第一小区为所述DU下的小区，所述第二小区为所述第一小区的邻接小区，所述CU和所述DU均属于第一接入网设备；
    所述DU保存所述第二小区的第一RACH配置。
  21. 根据权利要求20所述的方法，其特征在于，所述方法还包括：
    所述DU根据所述第二小区的第一RACH配置，以及，所述第一小区的RACH配置，确定所述第一小区的RACH配置与所述第二小区的第一RACH配置是否冲突。
  22. 根据权利要求21所述的方法，其特征在于，所述方法还包括：
    若所述第一小区的RACH配置与所述第二小区的第一RACH配置冲突，则所述DU为所述第一小区重新设置RACH配置。
  23. 一种通信装置，其特征在于，所述通信装置用于实现如权利要求1-6任一项所述的方法。
  24. 一种通信装置，其特征在于，所述通信装置用于实现如权利要求7-9任一项所述的方法。
  25. 一种通信装置，其特征在于，所述通信装置用于实现如权利要求10-19任一项所述的方法。
  26. 一种通信装置，其特征在于，所述通信装置用于实现如权利要求20-22任一项所述的方法。
  27. 一种芯片，其特征在于，所述芯片上存储有计算机程序，在所述计算机程序被所述芯片执行时，实现如权利要求1-22任一项所述的方法。
  28. 一种通信设备，其特征在于，所述通信设备包括：如权利要求23所述的通信装置，以及，权利要求24所述的通信装置。
  29. 一种通信设备，其特征在于，所述通信设备包括：如权利要求25所述的通信装置，以及，权利要求26所述的通信装置。
  30. 一种通信系统，其特征在于，所述通信系统包括：如权利要求28或29所述的通信设备。
  31. 一种计算机可读存储介质，其特征在于，用于存储计算机程序或指令，当所述计算机程序或指令在计算机上运行时，使得所述计算机执行权利要求1至22任一项所述的方法。
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108809595A (zh) * 2017-05-05 2018-11-13 华为技术有限公司 一种参考信号通知方法及其装置
CN109152086A (zh) * 2017-06-16 2019-01-04 北京三星通信技术研究有限公司 支持按需请求的系统消息的方法和设备
CN109526039A (zh) * 2017-09-19 2019-03-26 中国移动通信有限公司研究院 一种发送系统信息的方法和设备
WO2019170210A1 (en) * 2018-03-05 2019-09-12 Nokia Technologies Oy Communication connection control procedure for supporting and conducting handover
CN110351807A (zh) * 2018-04-04 2019-10-18 中兴通讯股份有限公司 接入选择方法及装置
CN110475335A (zh) * 2018-05-11 2019-11-19 华为技术有限公司 通信方法和装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108134644B (zh) * 2016-12-01 2019-10-22 中国移动通信有限公司研究院 同步方法、装置、同步设备及系统
US11223985B2 (en) * 2017-05-04 2022-01-11 Beijing Xiaomi Mobile Software Co., Ltd. Beam-based connection failure report
CN108989011B (zh) * 2017-06-16 2020-03-10 华为技术有限公司 传输信息的方法和装置
US11627607B2 (en) * 2017-09-11 2023-04-11 Qualcomm Incorporated Techniques and apparatuses for random access resource indication using a time offset
US11350410B2 (en) * 2018-04-06 2022-05-31 Lg Electronics Inc. Method for slot format for backhaul and access link in wireless communication system and terminal using same method
CN110831042B (zh) * 2018-08-09 2022-05-31 华为技术有限公司 测量配置方法与装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108809595A (zh) * 2017-05-05 2018-11-13 华为技术有限公司 一种参考信号通知方法及其装置
CN109152086A (zh) * 2017-06-16 2019-01-04 北京三星通信技术研究有限公司 支持按需请求的系统消息的方法和设备
CN109526039A (zh) * 2017-09-19 2019-03-26 中国移动通信有限公司研究院 一种发送系统信息的方法和设备
WO2019170210A1 (en) * 2018-03-05 2019-09-12 Nokia Technologies Oy Communication connection control procedure for supporting and conducting handover
CN110351807A (zh) * 2018-04-04 2019-10-18 中兴通讯股份有限公司 接入选择方法及装置
CN110475335A (zh) * 2018-05-11 2019-11-19 华为技术有限公司 通信方法和装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP4096276A4

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