Communication method and device

Abstract

The present application provides a communication method and apparatus, relating to the field of communication technology. In the method, a neighboring cell of a first cell can send system information including sidelink configuration information of the neighboring cell to a terminal in a non-demand manner. Accordingly, the terminal receives the system information from the neighboring cell in a non-demand manner, and determines the priority of the frequency point adopted by the neighboring cell based on the sidelink configuration information of the neighboring cell. In this case, the terminal performing sidelink communication can directly obtain the sidelink configuration information of the neighboring cell in the first cell without having to reside in the neighboring cell, which can facilitate the terminal to reselect the cell based on the sidelink configuration information of the neighboring cell.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a communication method and device. Background Art

[0002] Currently, in new radio (NR), the system information block (SIB) used to carry sidelink (SL) configuration information in a neighboring cell of a cell can be provided on-demand. When the SIB is provided on-demand, the base station does not broadcast the SIB until it receives a request from a terminal. In this case, if an idle or inactive terminal in the cell performs cell reselection, it is required to reside in a neighboring cell of the cell to obtain the SIB and, in turn, the SL configuration information, which is not conducive to cell reselection for terminals performing SL communication. Summary of the Invention

[0003] The embodiments of the present application provide a communication method and apparatus for improving the success rate of network access.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] On the first aspect, a communication method is provided, comprising: a terminal receives system information including sidelink configuration information of a neighboring cell of a first cell in a non-demand manner, and determines the priority of the frequency point adopted by the neighboring cell according to the sidelink configuration information of the neighboring cell. The sidelink is a direct communication link between a terminal and other terminals. In the method provided by the first aspect, the neighboring cell can send system information including SL configuration information of the neighboring cell to the terminal in a non-demand manner. In this case, the terminal performing SL communication can directly obtain the SL configuration information of the neighboring cell in the first cell without having to reside in the neighboring cell, which can facilitate the terminal to reselect the cell according to the SL configuration information of the neighboring cell, thereby improving the success rate of network access.

[0006] In combination with the first aspect, in a possible implementation method, the terminal receives system information from a neighboring cell of the first cell in a non-on-demand manner, including: the terminal directly receives system information from the neighboring cell, for example, the terminal directly receives system information broadcast by the neighboring cell from the neighboring cell.

[0007] In combination with the first aspect, in a possible implementation, the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on the anchor carrier; whether the neighboring cell provides information on the sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on the sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the second wireless access technology. In this optional method, the terminal can perform cell reselection based on the SL resource configuration of the neighboring cell. For example, the terminal can select a neighboring cell that can provide SL resource configuration that meets SL communication requirements, thereby ensuring SL communication quality after reselecting to the neighboring cell.

[0008] On the second aspect, a communication method is provided, comprising: a terminal receives system information including sidelink configuration information of a neighboring cell of the first cell from a first cell, and determines the priority of the frequency point adopted by the neighboring cell according to the sidelink configuration information of the neighboring cell. The sidelink is a direct communication link between a terminal and other terminals, and the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on anchor carriers; whether the neighboring cell provides information on sidelink resource configuration using a first wireless access technology; whether the neighboring cell provides information on sidelink resource configuration using a second wireless access technology; whether the neighboring cell only provides information on anchor carriers for sidelinks using the first wireless access technology; whether the neighboring cell only provides information on anchor carriers for sidelinks using the second wireless access technology. In the method provided on the second aspect, the first cell can send system information including SL configuration information of the neighboring cell to the terminal. In this case, the terminal performing SL communication can directly obtain the SL configuration information of the neighboring cell without having to reside in the neighboring cell, which can facilitate the terminal to reselect the cell according to the SL configuration information of the neighboring cell, thereby improving the success rate of network access.

[0009] With reference to the second aspect, in a possible implementation manner, the terminal receives system information from the first cell, including: the terminal receives the system information from the first cell in an on-demand manner or a non-on-demand manner.

[0010] In combination with the second aspect, in a possible implementation method, the terminal receives system information from the first cell in an on-demand manner, including: the terminal sends a request message to the first cell, the request message is used to request side link configuration information of the neighboring cell; the terminal receives system information from the first cell.

[0011] With reference to the second aspect, in a possible implementation, the terminal receives the system information from the first cell in a non-on-demand manner, including: the terminal directly receives the system information from the first cell.

[0012] In combination with the second aspect, in a possible implementation manner, the first cell obtains the sidelink configuration information of the neighboring cell through an interface between the network device to which the first cell belongs and the network device to which the neighboring cell belongs.

[0013] In combination with the first aspect or the second aspect, in a possible implementation manner, the sidelink resource configuration includes intra-carrier sidelink resource configuration and / or inter-carrier sidelink resource configuration.

[0014] In combination with the first aspect or the second aspect, in one possible implementation method, the sidelink resource configuration within the carrier of the neighboring cell refers to the sidelink resource configuration of the same frequency as the frequency adopted by the neighboring cell, or the sidelink resource configuration on the same carrier as the carrier adopted by the neighboring cell; the sidelink resource configuration between carriers of the neighboring cell refers to the sidelink resource configuration of a frequency different from the frequency adopted by the neighboring cell, or the sidelink resource configuration on the adjacent frequency of the frequency adopted by the neighboring cell, or the sidelink resource configuration on a carrier different from the carrier adopted by the neighboring cell.

[0015] In combination with the first aspect or the second aspect, in one possible implementation, a terminal determines the priority of a frequency point used by a neighboring cell based on the sidelink configuration information of the neighboring cell, including: when the terminal determines that the neighboring cell provides sidelink resource configuration based on the sidelink configuration information of the neighboring cell, the terminal determines the frequency point used by the neighboring cell as the frequency point with the highest priority. For a terminal performing sidelink communication, sidelink resources are required for sidelink communication. Therefore, this optional method determines the frequency point used by the neighboring cell that can provide sidelink resource configuration as the frequency point with the highest priority, thereby ensuring that sidelink resources are available after reselecting to the neighboring cell.

[0016] In combination with the first aspect or the second aspect, in a possible implementation, the terminal satisfies one or more of the following conditions: the terminal has sidelink communication capability, the terminal is configured to perform sidelink communication, and the terminal is authorized to perform sidelink communication.

[0017] In combination with the first aspect or the second aspect, in a possible implementation method, the terminal determines the priority of the frequency adopted by the neighboring cell based on the sidelink configuration information of the neighboring cell, including: when the terminal is configured to adopt both the first wireless access technology and the second wireless access technology for sidelink communication, the terminal will determine the frequency adopted by the neighboring cell that provides both the sidelink resource configuration adopting the first wireless access technology and the sidelink resource configuration adopting the second wireless access technology as the frequency with the highest priority; or, when the terminal is configured to adopt only the first wireless access technology for sidelink communication, the terminal will determine the frequency adopted by the neighboring cell that provides the sidelink resource configuration adopting the first wireless access technology as the frequency with the highest priority; or, when the terminal is configured to adopt only the second wireless access technology for sidelink communication, the terminal will determine the frequency adopted by the neighboring cell that uses the sidelink resource configuration adopting the second wireless access technology as the frequency with the highest priority. This optional method, when the terminal is currently configured to use a certain (or some) wireless access technology for sidelink communication, the terminal will determine the frequency used by the neighboring cell that can provide sidelink resource configuration using the certain (or some) wireless access technology as the frequency with the highest priority, which can ensure that suitable sidelink resources are available after reselecting to the neighboring cell.

[0018] In combination with the first aspect or the second aspect, in a possible implementation method, when the terminal is configured to use both the first radio access technology and the second radio access technology for sidelink communication, the terminal satisfies one or more of the following conditions: the terminal has the ability to use both the first radio access technology and the second radio access technology for sidelink communication; the terminal is authorized to perform sidelink communication using the first radio access technology and the second radio access technology; or, when the terminal is configured to use only the first radio access technology for sidelink communication, the terminal satisfies one or more of the following conditions: the terminal has the ability to use the first radio access technology for sidelink communication, and the terminal is authorized to perform sidelink communication using the first radio access technology; or, when the terminal is configured to use only the second radio access technology for sidelink communication, the terminal satisfies one or more of the following conditions: the terminal has the ability to use the second radio access technology for sidelink communication, and the terminal is authorized to perform sidelink communication using the second radio access technology.

[0019] In combination with the first aspect or the second aspect, in a possible implementation manner, one bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and / or one bit is used to indicate whether the neighboring cell only provides an anchor carrier.

[0020] In combination with the first aspect or the second aspect, in a possible implementation manner, 2 bits are used to indicate whether the neighboring cell provides sidelink resource configuration using the first radio access technology and / or the second radio access technology.

[0021] In combination with the first aspect or the second aspect, in a possible implementation manner, the sidelink resource configuration includes a sidelink transmission resource configuration and / or a sidelink reception resource configuration.

[0022] In combination with the first aspect or the second aspect, in a possible implementation manner, the neighboring cell not providing sidelink resource configuration means that the neighboring cell does not provide sidelink resource configuration through system information or dedicated signaling.

[0023] In combination with the first aspect or the second aspect, in a possible implementation manner, the neighboring cell does not provide sidelink resource configuration, which means that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

[0024] In combination with the first aspect or the second aspect, in a possible implementation, the sidelink configuration information of the neighboring cell includes one or more of the following information: the QoS profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; information on whether the neighboring cell has a sidelink radio bearer configuration with HARQ enabled; information on whether the neighboring cell has a sidelink radio bearer configuration using RLC AM; the sidelink resource pool index provided by the neighboring cell; the minimum CBR index of the sidelink resource pool provided by the neighboring cell; information on whether the neighboring cell has a synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; the synchronization reference source configuration provided by the neighboring cell. In this possible implementation, if the terminal determines that there are multiple frequencies with the highest priority, the terminal can determine the relative priorities of these frequencies based on this information, thereby more accurately determining the priority of the frequencies.

[0025] In combination with the first aspect or the second aspect, in one possible implementation, the terminal determines the priority of the frequency point used by the neighboring cell based on the sidelink configuration information of the neighboring cell, including: when the terminal is configured to transmit a service on the sidelink, the terminal determines the frequency point used by the neighboring cell that meets the service requirements as the highest priority frequency point based on the sidelink configuration information of the neighboring cell. In this possible implementation, the terminal determines the frequency point used by the neighboring cell that meets the service requirements as the highest priority frequency point, thereby ensuring that suitable sidelink resources are available after reselecting to the neighboring cell.

[0026] On the third aspect, a communication method is provided, which is applied to a network device, and the network device provides a neighboring cell of a first cell, and the method includes: generating system information including sidelink configuration information of the neighboring cell, where the sidelink is a direct communication link between two terminals; the neighboring cell sends system information to the terminal located in the first cell in a non-on-demand manner, and the sidelink configuration information of the neighboring cell in the system information is used by the terminal to determine the priority of the frequency adopted by the neighboring cell. In the method provided by the third aspect, the neighboring cell can send system information including SL configuration information of the neighboring cell to the terminal in a non-on-demand manner. In this case, the terminal performing SL communication can directly obtain the SL configuration information of the neighboring cell in the first cell without having to reside in the neighboring cell, which can facilitate the terminal to reselect the cell according to the SL configuration information of the neighboring cell, thereby improving the success rate of network access.

[0027] In combination with the third aspect, in a possible implementation manner, the neighboring cell sends the system information to the terminal located in the first cell in a non-on-demand manner, including: the neighboring cell directly sends the system information to the terminal.

[0028] In combination with the third aspect, in a possible implementation, the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on the anchor carrier; whether the neighboring cell provides information on the sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on the sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the second wireless access technology. In this optional method, the terminal can perform cell reselection based on the SL resource configuration of the neighboring cell. For example, the terminal can select a neighboring cell that can provide SL resource configuration that meets the SL communication requirements, thereby ensuring the SL communication quality after reselecting to the neighboring cell.

[0029] In a fourth aspect, a communication method is provided, which is applied to a network device, wherein the network device provides a first cell, and the method includes: generating system information including sidelink configuration information of a neighboring cell of the first cell, and sending the system information to a terminal located in the first cell, wherein the sidelink configuration information of the neighboring cell in the system information is used by the terminal to determine the priority of the frequency point adopted by the neighboring cell. The sidelink is a direct communication link between two terminals, and the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on anchor carriers; whether the neighboring cell provides information on sidelink resource configuration using a first wireless access technology; whether the neighboring cell provides information on sidelink resource configuration using a second wireless access technology; whether the neighboring cell only provides information on anchor carriers for sidelinks using the first wireless access technology; and whether the neighboring cell only provides information on anchor carriers for sidelinks using the second wireless access technology. The method provided in the fourth aspect is that the first cell can send system information containing SL configuration information of the neighboring cell to the terminal. In this case, the terminal performing SL communication can directly obtain the SL configuration information of the neighboring cell without having to reside in the neighboring cell. This can facilitate the terminal to reselect the cell according to the SL configuration information of the neighboring cell, thereby improving the network access success rate.

[0030] In combination with the fourth aspect, in a possible implementation manner, the first cell sends system information to a terminal located in the first cell, including: the first cell sends the system information to the terminal in an on-demand manner or a non-on-demand manner.

[0031] In combination with the fourth aspect, in a possible implementation method, the first cell sends system information to the terminal in an on-demand manner, including: the first cell receives a request message from the terminal, the request message is used to request side link configuration information of the neighboring cell; the first cell sends system information to the terminal according to the request message.

[0032] In combination with the fourth aspect, in a possible implementation manner, the first cell sends the system information to the terminal in a non-on-demand manner, including: the first cell directly sends the system information to the terminal.

[0033] In combination with the fourth aspect, in a possible implementation, the first cell obtains the sidelink configuration information of the neighboring cell through an interface between the network device to which the first cell belongs and the network device to which the neighboring cell belongs.

[0034] In combination with the third aspect or the fourth aspect, in one possible implementation, the sidelink resource configuration includes intra-carrier sidelink resource configuration and / or inter-carrier sidelink resource configuration.

[0035] In combination with the third aspect or the fourth aspect, in one possible implementation method, the sidelink resource configuration within the carrier of the neighboring cell refers to the sidelink resource configuration of the same frequency as the frequency adopted by the neighboring cell, or the sidelink resource configuration on the same carrier as the carrier adopted by the neighboring cell; the sidelink resource configuration between carriers of the neighboring cell refers to the sidelink resource configuration of a frequency different from the frequency adopted by the neighboring cell, or the sidelink resource configuration on the adjacent frequency of the frequency adopted by the neighboring cell, or the sidelink resource configuration on a carrier different from the carrier adopted by the neighboring cell.

[0036] In combination with the third aspect or the fourth aspect, in a possible implementation, one bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and / or one bit is used to indicate whether the neighboring cell only provides an anchor carrier.

[0037] In combination with the third aspect or the fourth aspect, in a possible implementation manner, 2 bits are used to indicate whether the neighboring cell provides side link resource configuration using the first radio access technology and / or the second radio access technology.

[0038] In combination with the third aspect or the fourth aspect, in a possible implementation manner, the sidelink resource configuration includes a sidelink transmission resource configuration and / or a sidelink reception resource configuration.

[0039] In combination with the third aspect or the fourth aspect, in a possible implementation manner, the neighboring cell does not provide sidelink resource configuration, which means that the neighboring cell does not provide sidelink resource configuration through system information or dedicated signaling.

[0040] In combination with the third aspect or the fourth aspect, in a possible implementation manner, the neighboring cell does not provide sidelink resource configuration, which means that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

[0041] In combination with the third aspect or the fourth aspect, in a possible implementation, the sidelink configuration information of the neighboring cell includes one or more of the following information: the QoS profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; information on whether the neighboring cell has a sidelink radio bearer configuration with HARQ enabled; information on whether the neighboring cell has a sidelink radio bearer configuration using RLC AM; the sidelink resource pool index provided by the neighboring cell; the minimum CBR index of the sidelink resource pool provided by the neighboring cell; information on whether the neighboring cell has a synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; the synchronization reference source configuration provided by the neighboring cell. In this possible implementation, if the terminal determines that there are multiple frequencies with the highest priority, the terminal can determine the relative priorities of these frequencies based on this information, thereby more accurately determining the priority of the frequencies.

[0042] In a fifth aspect, a communication method is provided, including: a terminal receives system information including sidelink configuration information of a neighboring cell of a first cell, and determines whether the neighboring cell meets service requirements based on the sidelink configuration information of the neighboring cell of the first cell. Among them, the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on anchor carriers; whether the neighboring cell provides information on sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on anchor carriers for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on anchor carriers for the sidelink using the second wireless access technology; the QoS profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; whether the neighboring cell has information on sidelink radio bearer configuration with HARQ enabled; whether the neighboring cell has information on sidelink radio bearer configuration using RLC AM; the sidelink resource pool index provided by the neighboring cell; the minimum CBR index of the sidelink resource pool provided by the neighboring cell; whether the neighboring cell has information on synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; the synchronization reference source configuration provided by the neighboring cell. The method provided in the fifth aspect is that the terminal performing SL communication can obtain the SL configuration information of the neighboring cell, and can determine whether the neighboring cell meets the service requirements based on the SL configuration information of the neighboring cell. In this case, the terminal can reselect to the neighboring cell that meets the service requirements, thereby preventing subsequent connection establishment or connection recovery, avoiding increasing the power consumption of the terminal, and improving service transmission performance and continuity.

[0043] In conjunction with the fifth aspect, in a possible implementation manner, the terminal receives system information, including: the terminal receives system information from a neighboring cell in a non-on-demand manner.

[0044] In conjunction with the fifth aspect, in a possible implementation manner, the terminal receives system information from a neighboring cell in a non-on-demand manner, including: the terminal directly receives system information from the neighboring cell.

[0045] In combination with the fifth aspect, in a possible implementation manner, the terminal receives system information, including: the terminal receives system information from the first cell.

[0046] In combination with the fifth aspect, in a possible implementation manner, the terminal receives system information from the first cell, including: the terminal receives the system information from the first cell in an on-demand manner or a non-on-demand manner.

[0047] In combination with the fifth aspect, in a possible implementation method, the terminal receives system information from the first cell in an on-demand manner, including: the terminal sends a request message to the first cell, the request message is used to request side link configuration information of the neighboring cell; the terminal receives system information from the first cell.

[0048] In combination with the fifth aspect, in a possible implementation manner, the terminal receives the system information from the first cell in a non-on-demand manner, including: the terminal directly receives the system information from the first cell.

[0049] In combination with the fifth aspect, in a possible implementation, the first cell obtains the sidelink configuration information of the neighboring cell through an interface between the network device to which the first cell belongs and the network device to which the neighboring cell belongs.

[0050] In combination with the fifth aspect, in a possible implementation manner, the sidelink resource configuration includes intra-carrier sidelink resource configuration and / or inter-carrier sidelink resource configuration.

[0051] In combination with the fifth aspect, in one possible implementation method, the sidelink resource configuration within the carrier of the neighboring cell refers to the sidelink resource configuration of the same frequency as the frequency adopted by the neighboring cell, or the sidelink resource configuration on the same carrier as the carrier adopted by the neighboring cell; the sidelink resource configuration between carriers of the neighboring cell refers to the sidelink resource configuration of a frequency different from the frequency adopted by the neighboring cell, or the sidelink resource configuration on the adjacent frequency of the frequency adopted by the neighboring cell, or the sidelink resource configuration on a carrier different from the carrier adopted by the neighboring cell.

[0052] In combination with the fifth aspect, in a possible implementation, one bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and / or one bit is used to indicate whether the neighboring cell only provides an anchor carrier.

[0053] In combination with the fifth aspect, in a possible implementation manner, 2 bits are used to indicate whether the neighboring cell provides side link resource configuration using the first radio access technology and / or the second radio access technology.

[0054] In combination with the fifth aspect, in a possible implementation, the sidelink resource configuration includes a sidelink transmission resource configuration and / or a sidelink reception resource configuration.

[0055] In combination with the fifth aspect, in a possible implementation manner, the neighboring cell does not provide sidelink resource configuration, which means that the neighboring cell does not provide sidelink resource configuration through system information or dedicated signaling.

[0056] In combination with the fifth aspect, in a possible implementation manner, the neighboring cell does not provide sidelink resource configuration, which means that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

[0057] In conjunction with the fifth aspect, in one possible implementation, the method further includes: if the sidelink configuration information of the neighboring cell does not meet the service requirements, the terminal does not prioritize reselecting to the neighboring cell. This possible implementation can avoid reselecting to a neighboring cell that does not meet the service requirements.

[0058] In conjunction with the fifth aspect, in one possible implementation, the method further includes: if the sidelink configuration information of the neighboring cell does not meet the service requirements, the terminal avoids reselecting to the neighboring cell. This possible implementation can avoid reselecting to a neighboring cell that does not meet the service requirements.

[0059] In conjunction with the fifth aspect, in one possible implementation, the method further includes: the terminal removing neighboring cells whose sidelink configuration information does not meet service requirements from the first candidate cell list to obtain a second candidate cell list; if the number of cells in the second candidate cell list is greater than 0, the terminal reselects cells in the second candidate cell list; if the number of cells in the second candidate cell list is equal to 0, the terminal adds the removed cells to the second candidate cell list and reselects cells in the second candidate cell list after the cells are added. This possible implementation can avoid reselecting to a neighboring cell that does not meet service requirements.

[0060] In combination with the fifth aspect, in a possible implementation, the method further includes: the terminal adds the neighboring cells whose sidelink configuration information in the first candidate cell list meets the service requirements to the second candidate cell list; if the number of cells in the second candidate cell list is greater than 0, the terminal reselects the cells in the second candidate cell list; if the number of cells in the second candidate cell list is equal to 0, the terminal reselects the cells in the first candidate cell list. This possible implementation can avoid reselecting to a neighboring cell that does not meet the service requirements. In the sixth aspect, a communication method is provided, which is applied to a network device, and the network device provides neighboring cells of a first cell. The method includes: generating system information including sidelink configuration information of the neighboring cells of the first cell, and sending the system information to a terminal located in the first cell in a non-on-demand manner. The sidelink configuration information of the neighboring cells in the system information is used by the terminal to determine whether the neighboring cells meet the service requirements. Among them, the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on anchor carrier; whether the neighboring cell provides information on sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on anchor carrier for the sidelink using the second wireless access technology; the QoS profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; whether the neighboring cell has information on HARQ-enabled sidelink radio bearer configuration; whether the neighboring cell has information on RLC AM-enabled sidelink radio bearer configuration; the sidelink resource pool index provided by the neighboring cell; the minimum CBR index of the sidelink resource pool provided by the neighboring cell; whether the neighboring cell has information on synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; the synchronization reference source configuration provided by the neighboring cell; wherein the sidelink is a direct communication link between two terminals. The method provided in the sixth aspect is that the terminal performing SL communication can obtain the SL configuration information of the neighboring cell, and can determine whether the neighboring cell meets the service requirements based on the SL configuration information of the neighboring cell. In this case, the terminal can reselect to the neighboring cell that meets the service requirements, thereby preventing subsequent connection establishment or connection recovery, avoiding increasing the power consumption of the terminal, and improving service transmission performance and continuity.

[0061] In combination with the sixth aspect, in a possible implementation manner, the neighboring cell sends system information to the terminal located in the first cell in a non-on-demand manner, including: the neighboring cell directly sends the system information to the terminal.

[0062] In the seventh aspect, a communication method is provided, which is applied to a network device, wherein the network device provides a first cell, and the method includes: generating system information including side link configuration information of a neighboring cell of the first cell, and sending the system information to a terminal located in the first cell, wherein the side link configuration information of the neighboring cell in the system information is used by the terminal to determine whether the neighboring cell meets service requirements. Among them, the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on anchor carrier; whether the neighboring cell provides information on sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on anchor carrier for the sidelink using the second wireless access technology; the QoS profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; whether the neighboring cell has information on HARQ-enabled sidelink radio bearer configuration; whether the neighboring cell has information on RLC AM-enabled sidelink radio bearer configuration; the sidelink resource pool index provided by the neighboring cell; the minimum CBR index of the sidelink resource pool provided by the neighboring cell; whether the neighboring cell has information on synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; the synchronization reference source configuration provided by the neighboring cell; wherein the sidelink is a direct communication link between two terminals. The method provided in the seventh aspect is that the terminal performing SL communication can obtain the SL configuration information of the neighboring cell, and can determine whether the neighboring cell meets the service requirements based on the SL configuration information of the neighboring cell. In this case, the terminal can reselect to the neighboring cell that meets the service requirements, thereby preventing subsequent connection establishment or connection recovery, avoiding increasing the power consumption of the terminal, and improving service transmission performance and continuity.

[0063] In combination with the seventh aspect, in a possible implementation manner, the first cell sends system information to a terminal located in the first cell, including: the first cell sends the system information to the terminal in an on-demand manner or a non-on-demand manner.

[0064] In combination with the seventh aspect, in a possible implementation method, the first cell sends system information to the terminal in an on-demand manner, including: the first cell receives a request message from the terminal, the request message is used to request side link configuration information of the neighboring cell; the first cell sends system information to the terminal according to the request message.

[0065] In combination with the seventh aspect, in a possible implementation manner, the first cell sends the system information to the terminal in a non-on-demand manner, including: the first cell directly sends the system information to the terminal.

[0066] In combination with the seventh aspect, in a possible implementation method, the first cell obtains the side link configuration information of the neighboring cell through the interface between the network device to which the first cell belongs and the network device to which the neighboring cell belongs.

[0067] In combination with the sixth aspect or the seventh aspect, in one possible implementation, the sidelink resource configuration includes intra-carrier sidelink resource configuration and / or inter-carrier sidelink resource configuration.

[0068] In combination with the sixth aspect or the seventh aspect, in one possible implementation method, the sidelink resource configuration within the carrier of the neighboring cell refers to the sidelink resource configuration of the same frequency as the frequency adopted by the neighboring cell, or the sidelink resource configuration on the same carrier as the carrier adopted by the neighboring cell; the sidelink resource configuration between carriers of the neighboring cell refers to the sidelink resource configuration of a frequency different from the frequency adopted by the neighboring cell, or the sidelink resource configuration on the adjacent frequency of the frequency adopted by the neighboring cell, or the sidelink resource configuration on a carrier different from the carrier adopted by the neighboring cell.

[0069] In combination with the sixth aspect or the seventh aspect, in one possible implementation, one bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and / or one bit is used to indicate whether the neighboring cell only provides an anchor carrier.

[0070] In combination with the sixth aspect or the seventh aspect, in a possible implementation, 2 bits are used to indicate whether the neighboring cell provides side link resource configuration using the first radio access technology and / or the second radio access technology.

[0071] In combination with the sixth aspect or the seventh aspect, in a possible implementation, the sidelink resource configuration includes a sidelink transmission resource configuration and / or a sidelink reception resource configuration.

[0072] In combination with the sixth aspect or the seventh aspect, in a possible implementation method, the neighboring cell does not provide sidelink resource configuration, which means that the neighboring cell does not provide sidelink resource configuration through system information or dedicated signaling.

[0073] In combination with the sixth aspect or the seventh aspect, in one possible implementation, the neighboring cell does not provide sidelink resource configuration, which means that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

[0074] In an eighth aspect, a communication device is provided, comprising: a functional unit configured to perform any one of the methods provided in the first aspect, wherein the actions performed by the functional unit are implemented via hardware or via hardware executing corresponding software implementations. For example, the communication device may include a communication unit configured to receive and / or transmit signals and a processing unit configured to perform information processing.

[0075] In a ninth aspect, a communication device is provided, comprising: a functional unit for executing any one of the methods provided in the second aspect, wherein the actions performed by the functional unit are implemented via hardware or via hardware executing corresponding software implementations. For example, the communication device may include a communication unit and a processing unit, wherein the communication unit is configured to receive and / or transmit signals, and the processing unit is configured to perform information processing.

[0076] In a tenth aspect, a communication device is provided, comprising: a functional unit for executing any one of the methods provided in the third aspect, wherein the actions performed by the functional unit are implemented via hardware or via hardware executing corresponding software implementations. For example, the communication device may include a communication unit and a processing unit, wherein the communication unit is configured to receive and / or transmit signals, and the processing unit is configured to perform information processing.

[0077] In an eleventh aspect, a communication device is provided, comprising: a functional unit configured to perform any one of the methods provided in the fourth aspect, wherein the actions performed by the functional unit are implemented via hardware or via hardware executing corresponding software implementations. For example, the communication device may include a communication unit configured to receive and / or transmit signals and a processing unit configured to perform information processing.

[0078] In a twelfth aspect, a communication device is provided, comprising: a functional unit configured to perform any one of the methods provided in the fifth aspect, wherein the actions performed by the functional unit are implemented via hardware or via hardware executing corresponding software implementations. For example, the communication device may include a communication unit configured to receive and / or transmit signals and a processing unit configured to perform information processing.

[0079] In a thirteenth aspect, a communication device is provided, comprising: a functional unit configured to perform any one of the methods provided in the sixth aspect, wherein the actions performed by the functional unit are implemented via hardware or via hardware executing corresponding software implementations. For example, the communication device may include a communication unit configured to receive and / or transmit signals and a processing unit configured to perform information processing.

[0080] In a fourteenth aspect, a communication device is provided, comprising: a functional unit configured to perform any one of the methods provided in the seventh aspect, wherein the actions performed by the functional unit are implemented via hardware or via hardware executing corresponding software implementations. For example, the communication device may include a communication unit configured to receive and / or transmit signals and a processing unit configured to perform information processing.

[0081] In a fifteenth aspect, a communication device is provided, comprising: a processor. The processor is connected to a memory, the memory being configured to store computer-executable instructions, and the processor executes the computer-executable instructions stored in the memory, thereby implementing any of the methods provided in any of aspects 1 to 7. The memory and processor may be integrated or separate components. In the latter case, the memory may be located within or outside the communication device.

[0082] In one possible implementation, the processor includes a logic circuit and at least one of an input interface and an output interface, wherein the output interface is used to perform the sending action in the corresponding method, and the input interface is used to perform the receiving action in the corresponding method.

[0083] In one possible implementation, the communication device further includes a communication interface and a communication bus, and the processor, memory, and communication interface are connected via the communication bus. The communication interface is configured to perform the sending and receiving actions in the corresponding method. The communication interface may also be referred to as a transceiver. Optionally, the communication interface includes at least one of a transmitter and a receiver. In this case, the transmitter is configured to perform the sending action in the corresponding method, and the receiver is configured to perform the receiving action in the corresponding method.

[0084] In a possible implementation, the communication device exists in the form of a chip product.

[0085] In the sixteenth aspect, a communication system is provided, comprising: the communication device provided in the eighth aspect and the communication device provided in the tenth aspect; or, the communication device provided in the ninth aspect and the communication device provided in the eleventh aspect; the communication device provided in the twelfth aspect and the communication device provided in the thirteenth or fourteenth aspect.

[0086] In the seventeenth aspect, a computer-readable storage medium is provided, comprising instructions, which, when executed on a computer, enable the computer to execute any one of the methods provided in any one of the first to seventh aspects.

[0087] In the eighteenth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, causes the computer to execute any one of the methods provided in any one of the first to seventh aspects.

[0088] The technical effects brought about by any implementation method in the eighth to eighteenth aspects can refer to the technical effects brought about by the corresponding implementation methods in the first to seventh aspects, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] Figure 1 A schematic diagram of a network architecture provided in an embodiment of the present application;

[0090] Figure 2 A schematic diagram of V2X communication;

[0091] Figures 3 to 6 Flowcharts of the communication methods provided in the embodiments of the present application;

[0092] Figure 7 A schematic diagram of the composition of a communication device provided in an embodiment of the present application;

[0093] Figure 8 and Figure 9 They are respectively schematic diagrams of the hardware structure of a communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0094] In the description of this application, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, "at least one" means one or more, and "a plurality" means two or more. Words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not limit them to be necessarily different.

[0095] It should be noted that, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0096] The network elements involved in this application include network devices and terminals in the communication system. Figure 1 , the method provided in the embodiment of the present application mainly relates to communication between terminals and communication between terminals and network devices. Among them, the terminal and the network device can communicate through the Uu port, and the terminal and the terminal can communicate through the PC5 port. The communication link for direct communication between terminals can be called SL or side link. In the embodiment of the present application, the two terminals performing SL communication can access the same network device, for example, terminal 1 and terminal 2, or they can access different network devices (for example, terminal 2 and terminal 3). On the SL, the sending terminal can send data directly to the receiving terminal without first sending the data to the network device, and then forwarding it through the core network, and then sending it to the receiving terminal, which can greatly reduce the data transmission delay.

[0097] The communication systems in the embodiments of the present application include but are not limited to long term evolution (LTE) systems, fifth generation (5G) systems, NR systems, wireless local area networks (WLAN) systems, and future evolution systems or multiple communication convergence systems. Exemplarily, the methods provided in the embodiments of the present application can be specifically applied to evolved universal terrestrial radio access networks (E-UTRAN) and next generation radio access networks (NG-RAN) systems.

[0098] The network device in the embodiment of the present application is an entity on the network side for sending signals, or receiving signals, or sending and receiving signals. The network device can be a device deployed in a radio access network (RAN) to provide wireless communication functions for terminals, for example, a transmission reception point (TRP), a base station (for example, an evolved NodeB (eNB or eNodeB), a next generation node base station (gNB), a next generation eNB (ng-eNB), etc.), various forms of control nodes (for example, a network controller, a wireless controller (for example, a wireless controller in a cloud radio access network (CRAN) scenario)), a road side unit (RSU), etc. Specifically, the network device can be various forms of macro base stations, micro base stations (also called small stations), relay stations, access points (AP), etc., or it can be an antenna panel of a base station. The control node can connect to multiple base stations and configure resources for multiple terminals covered by the multiple base stations. In systems using different radio access technologies (RATs), the names of devices with base station functions may vary. For example, in LTE systems, they may be called eNB or eNodeB, and in 5G or NR systems, they may be called gNB. This application does not limit the specific name of the base station. The network equipment may also be network equipment in the future evolved public land mobile network (PLMN).

[0099] The terminal in the embodiment of the present application is an entity on the user side for receiving signals, or sending signals, or receiving and sending signals. The terminal is used to provide one or more of voice services and data connectivity services to the user. The terminal can also be called user equipment (UE), terminal equipment, access terminal, user unit, user station, mobile station, remote station, remote terminal, mobile device, user terminal, wireless communication device, user agent or user device. The terminal can be a vehicle to everything (V2X) device, for example, a smart car (smart car or intelligent car), a digital car (digital car), an unmanned car (unmanned car or driverless car or pilotless car or automobile), an automatic car (self-driving car or autonomous car), a pure electric vehicle (pure EV or battery EV), a hybrid electric vehicle (hybrid electric vehicle, HEV), a range extended EV (REEV), a plug-in hybrid electric vehicle (plug-in HEV, PHEV), a new energy vehicle (new energy vehicle), etc. The terminal may also be a device-to-device (D2D) device, such as an electricity meter or a water meter. The terminal may also be a mobile station (MS), a subscriber unit (subscriber unit), a drone, an Internet of Things (IoT) device, a station (ST) in a WLAN, a cellular phone, a smart phone, a cordless phone, a wireless data card, a tablet computer, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a laptop computer, a Machine Type Communication (MTC) terminal, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, or a wearable device (also referred to as a wearable smart device).The terminal may also be a terminal in a next generation communication system, for example, a terminal in a 5G system or a terminal in a future evolved PLMN, a terminal in a NR system, etc.

[0100] The method provided in the embodiments of the present application is applicable to but not limited to the following fields: D2D, V2X, unmanned driving, automated driving (ADS), driver assistance (ADAS), intelligent driving, connected driving, intelligent network driving, car sharing, etc.

[0101] Vehicles obtain road condition information or receive information services in a timely manner through communication methods such as vehicle to vehicle (V2V), vehicle to roadside infrastructure (V2I), vehicle to pedestrian (V2P), or vehicle to network (V2N). These communication methods can be collectively referred to as V2X communication.

[0102] Taking the most common V2V communication and V2I communication as examples, Figure 2 This is a schematic diagram of V2V communication and V2I communication. Figure 2 As shown, through V2V communication, vehicles can broadcast information such as their own speed, driving direction, specific location, whether the emergency brake is pressed, etc. to surrounding vehicles. By obtaining this type of information, the drivers of surrounding vehicles can better perceive the traffic conditions beyond the visual range, so as to make early predictions of dangerous situations and make avoidance moves. As for V2I communication, in addition to the above-mentioned exchange of safety information, roadside infrastructure, such as RSU, can provide vehicles with various types of service information and access to data networks, greatly improving traffic intelligence. When the method provided in the embodiment of the present application is applied in a V2I scenario, the network device in the present application can be a roadside infrastructure, such as RSU, and the terminal can be a vehicle.

[0103] In order to make this application clearer, we first briefly introduce some concepts involved in this application.

[0104] 1. SL resources

[0105] When two terminals perform SL communication, the SL resources used can be the following two types.

[0106] The first type is dedicated resources

[0107] Dedicated resources can be resources scheduled for the terminal by the network device through the mode 1 (mode1) resource configuration mode (the name in NR) or the mode 3 (mode3) resource configuration mode (the name in LTE). In mode 1 or mode 3, the network device can semi-statically or dynamically allocate SL resources to the terminal through the terminal's dedicated radio network temporary identifier (RNTI). Mode 1 or mode 3 mainly supports terminals in the connected state.

[0108] Dedicated resources include configured grant (CG) resources, such as type 1 CG (SL configured grant type-1) resources, type 2 CG (SL configured grant type-2) resources, SL grant free resources, and SL Semi-Persistent Scheduling (SL SPS) resources. Dedicated resources also include dynamic grant (DG) resources.

[0109] Mode 1 or mode 3 in the embodiments of the present application refers to a resource allocation method based on base station scheduling, which is not limited to mode 1 or mode 3, and also includes future resource allocation methods based on base station scheduling.

[0110] Second, competitive resources

[0111] Contention resources may be resources allocated to the terminal by the network device through the mode 2 (mode2) resource configuration mode (name in NR) or the mode 4 (mode4) resource configuration mode (name in LTE). In mode 2 or mode 4, when the terminal is within the communication coverage of the network device, the network device may configure an SL resource pool for the terminal through broadcast system information or dedicated signaling. The SL resource pool is shared by multiple terminals. The terminal sends control signals and / or data signals by competing with other terminals to obtain appropriate SL resources in the SL resource pool. Mode 2 and mode 4 support terminals in idle, inactive, and connected states.

[0112] Mode 2 or mode 4 in the embodiments of the present application refers to a terminal autonomous resource allocation method, which is not limited to mode 2 or mode 4, and also includes future terminal autonomous resource allocation methods.

[0113] This application mainly relates to the second type of SL resources.

[0114] 2. Cell selection and cell reselection

[0115] Cell selection refers to the process of selecting a cell to reside in when a terminal is powered on or enters a covered area from a blind spot. When a terminal is powered on or enters a covered area from a blind spot, it selects a PLMN and performs a cell search to identify cells that meet certain conditions. Cell selection then selects a cell to reside in from among those that meet certain conditions.

[0116] Cell reselection refers to the reselection of a cell by a terminal in idle or inactive state. When a terminal resides in a cell, the signal strength of the current cell and nearby cells fluctuates as the terminal moves. Therefore, the terminal needs to monitor the signal quality of neighboring cells and the current cell and select the best cell for service through cell reselection.

[0117] Cell reselection includes intra-frequency cell reselection and inter-frequency cell reselection (including inter-RAT cell reselection). Inter-frequency cell reselection includes non-inter-RAT inter-frequency cell reselection and inter-RAT cell reselection.

[0118] When performing cell reselection, the terminal prioritizes each frequency according to certain rules and determines whether the cells on the frequency meet the conditions in descending order of priority. If multiple neighboring cells at the highest priority meet the conditions, the terminal selects the optimal cell at the highest priority frequency. For frequencies of equal priority (or same frequency), the R criterion for same-frequency cell reselection is used to reselect the cell. In the embodiments of the present application, the frequency can also be replaced by a carrier, and the carrier can also be replaced by a frequency.

[0119] When performing cell reselection, the terminal determines cells that meet the S criterion in the candidate cell list and performs cell reselection among the cells that meet the S criterion. The candidate cell list hereinafter may refer to the initial candidate cell list or a list of cells in the candidate cell set that meet the S criterion.

[0120] 3. Cell reselection priority

[0121] The cell reselection priority refers to the priority of each frequency point during the above-mentioned cell reselection. The following describes the existing cell reselection priority of a terminal performing SL communication through Case 1 and Case 2. In the following description, NR Uu refers to the Uu port of NR, NR SL refers to the SL of NR, LTE Uu refers to the Uu port of LTE, LTE SL refers to the SL of LTE, NR V2X refers to the V2X of NR, NRV2X SIB refers to the SIB in the V2X of NR, and LTE V2X refers to the V2X of LTE.

[0122] Case 1: Cell reselection priority when scheduling within the same RAT

[0123] Taking NR as an example, in the neighboring cell of the cell where the terminal resides, if the network device configures NR SL for the terminal in the neighboring cell through NR Uu, the network device can provide the terminal in the neighboring cell with intra-carrier NRSL configuration, inter-carrier NR SL configuration, and NR anchor carrier for NR SL configuration through NR Uu.

[0124] Among them, the intra-carrier NR SL configuration refers to the NR SL configuration of the NR SL frequency point that is the same as the NR Uu frequency point. The inter-carrier NR SL configuration refers to the NR SL configuration of the NR SL frequency point that is different from the NR Uu frequency point. Among them, when the network device provides intra-carrier NR SL configuration and inter-carrier NR SL configuration, it will provide specific SL resource configuration. When the network device provides the NR anchor carrier, the network device does not provide SL configuration, and the terminal searches for NR SL configuration on the NR anchor carrier. Among them, the neighboring cell can indicate the anchor carrier through the parameter anchorCarrierFreqList.

[0125] In case 1, in the neighboring cell of the cell where the terminal resides, the NR Uu frequency that can provide intra-carrier NR SL configuration and inter-carrier NR SL configuration is the highest priority frequency in the cell reselection priority. Two Uu frequencies of intra-carrier NR SL configuration and inter-carrier NR SL configuration are provided respectively, without distinguishing relative priorities. In addition, the NR Uu frequency that only provides NR anchor carrier configuration is not prioritized.

[0126] In NR V2X, the terminal needs to read the SIB scheduling information in the SIB1 of the neighboring cell to find out whether the neighboring cell provides a SIB that can carry the NR SL configuration. Among them, the SIB that provides the NR SL configuration can be provided on demand or non-on demand. The on-demand method means that the network device sends the SIB to the terminal only after receiving the request of the terminal. Exemplarily, the SIB can be an NR V2X SIB, and the NR V2X SIB can include one or more of the above-mentioned intra-carrier NR SL configuration, inter-carrier NRSL configuration, and NR anchor carrier configuration that provides NR SL configuration.

[0127] Case 2: Cell reselection priority during cross-RAT (i.e. different RAT) scheduling

[0128] In the neighboring cell of the cell where the terminal resides, if the network device performs NR SL configuration for the terminal through LTE Uu, the network device provides the terminal in the neighboring cell with inter-carrier NR SL configuration, LTE anchor carrier for NR SL configuration, and NR anchor carrier for NR SL configuration through LTE Uu. The inter-carrier NR SL configuration refers to the NR SL configuration of an NR SL frequency point different from the LTE Uu frequency point. In this case, in the neighboring cell of the terminal, the LTE Uu frequency point that can provide the inter-carrier NR SL configuration is the frequency point with the highest priority in the cell reselection priority.

[0129] In the neighboring cell of the cell where the terminal resides, if the network device performs LTE SL configuration for the terminal through NR Uu, the network device provides the terminal in the neighboring cell with inter-carrier LTE SL configuration, LTE anchor carrier for LTE SL configuration, and NR anchor carrier for LTE SL configuration through NR Uu. The inter-carrier LTE SL configuration refers to the LTE SL configuration of an LTE SL frequency point that is different from the NR Uu frequency point. In this case, in the neighboring cell of the terminal, the NR Uu frequency point that can provide the inter-carrier LTE SL configuration is the frequency point with the highest priority in the cell reselection priority.

[0130] When the network device performs LTE SL configuration for the terminal through LTE Uu, the SIB carrying the LTE SL configuration is an existing SIB. When the network device performs NR SL configuration for the terminal through NR Uu, the SIB carrying the NR SL configuration is also an existing SIB. When the network device performs NR SL configuration for the terminal through LTE Uu, the SIB carrying the NR SL configuration is a separate new SIB (for example, SIB28). When the network device performs LTE SL configuration for the terminal through NR Uu, the SIB carrying the LTE SL configuration is also a separate new SIB (for example, SIB29). In this case, for the terminal that wants to reselect a cell, the terminal needs to read the SIB scheduling information in the SIB1 of the neighboring cell to find out whether the neighboring cell provides NR SL configuration and / or LTE SL configuration SIB. For example, if the SIB scheduling information in SIB1 includes scheduling information of the existing SIB and the new SIB, it means that the neighboring cell can provide NR SL configuration and LTE SL configuration SIB.

[0131] It should be noted that if the network device performs NR SL configuration for the terminal through LTE Uu, the network device can perform NR SL configuration for the terminal only through LTE Uu, or it can perform NR SL configuration and LTE SL configuration for the terminal through LTE Uu. If the network device performs LTE SL configuration for the terminal through NR Uu, the network device can perform LTESL configuration for the terminal only through NR Uu, or it can perform LTE SL configuration and NR SL configuration for the terminal through NR Uu. In this case, if the upper layer of the terminal is configured to perform SL communication for LTE V2X services and NR V2X services, the frequency that provides both LTE SL configuration and NR SL configuration may have a higher priority than the frequency that only provides LTE SL configuration or NR SL configuration.

[0132] Based on the above description, the problems existing in the prior art are summarized below.

[0133] Question 1

[0134] For a terminal that wants to reselect a cell, the terminal can learn whether the neighboring cell provides a SIB carrying NR SL configuration and / or LTE SL configuration by reading the SIB scheduling information in the SIB1 of the neighboring cell. However, if the SIB is provided on demand, the terminal is required to reside in the neighboring cell before obtaining the SIB and then obtaining the SL configuration information, which makes it impossible for the terminal performing SL communication to determine the priority of the frequency used by the neighboring cell in the serving cell.

[0135] Question 2

[0136] For a terminal that wants to reselect a cell, the terminal can learn whether the neighboring cell provides a SIB carrying NR SL configuration and / or LTE SL configuration by reading the SIB scheduling information in the SIB1 of the neighboring cell. If the SIB is provided in a non-on-demand manner, although the terminal can directly obtain the SIB, the terminal's reading of the SIBs of multiple neighboring cells will increase the power consumption of the terminal.

[0137] Question 3

[0138] If a terminal reselects to a cell but the cell does not provide SL resource configuration or sidelink radio bearer (SLRB) configuration that does not meet the quality of service (QoS) requirements of the current V2X service, the terminal needs to initiate connection establishment (for idle terminals) or connection recovery (for inactive terminals) to obtain appropriate SL resources or SL configuration from the network device. On the one hand, this will increase the power consumption of the pedestrian to everything (P2X) terminal. On the other hand, before obtaining the appropriate SL resources or SL configuration, the terminal uses an exeptional resource pool for service transmission. However, the performance of the exeptional resource pool is unreliable, especially when a large number of terminals are used, and the performance difference relative to the competing resources is large, which will affect the service transmission performance and continuity of the V2X terminals with service transmission, and have a greater impact on critical services.

[0139] In order to solve the above problems, the present application provides a communication method shown in the following embodiments.

[0140] Example 1

[0141] In embodiment 1, the neighboring cell (the neighboring cell of the first cell is simply described as the neighboring cell in each embodiment of the present application) of the cell where the terminal resides (the cell where the terminal resides is recorded as the first cell in each embodiment of the present application) sends system information to the terminal in a non-on-demand manner.

[0142] For details, see Figure 3 , the communication method provided in embodiment 1 includes:

[0143] 301. Generate system information, where the system information includes SL configuration information of a neighboring cell. SL is a direct communication link between two terminals.

[0144] In various embodiments of the present application, the first cell and the neighboring cell are both provided by a network device. The network device providing one or more neighboring cells and the network device providing the first cell can be the same network device or different network devices. Detailed description will not be given below.

[0145] In step 301, the system information may be generated by the network device to which the neighboring cell belongs (or the network device providing the neighboring cell), or may be generated by the neighboring cell. Figure 3 The neighboring area generation is used as an example for drawing.

[0146] In various embodiments of the present application, the SL configuration may include one or more of SL resource configuration, synchronization configuration, resource selection configuration, zone configuration, channel busy ratio (CBR) related configuration, and other information. The SL resource configuration may be used to indicate SL resources, for example, one or more of SL time domain resources, SL frequency domain resources, SL code domain resources, and SL spatial domain resources. This will not be further described below.

[0147] In various embodiments of the present application, SL resource configuration may be resource configuration of SL communication, or resource configuration in SL communication configuration.

[0148] 302. The neighboring cell sends system information to the terminal in a non-on-demand manner. Correspondingly, the terminal receives system information from the neighboring cell in a non-on-demand manner.

[0149] If there are multiple neighboring cells, each of the multiple neighboring cells may execute step 301 and step 302, and the terminal may receive system information sent by multiple neighboring cells.

[0150] For cells, the non-on-demand method in each embodiment of the present application refers to a method of sending information to a terminal without relying on a request from the terminal. For terminals, the non-on-demand method in each embodiment of the present application refers to a method of obtaining information without sending a request. In this case, step 302 may include, in specific implementation, that the neighboring cell directly sends system information to the terminal, and correspondingly, the terminal directly receives system information from the neighboring cell. In each embodiment of the present application, the terminal directly receives information means that the terminal does not send a request before receiving the information. A cell directly sending information means that the cell does not send information based on the request of the terminal.

[0151] Exemplarily, the non-on-demand mode may be a broadcast mode. In this case, step 302 may include, when implemented specifically: broadcasting system information to a neighboring cell, and correspondingly, the terminal receives the system information broadcast by the neighboring cell from the neighboring cell.

[0152] The system information may be a system information block (e.g., a master information block (MIB), MIB-SL-V2X, SIB1, etc.) that cannot be sent on demand. For a cell, the on-demand method in each embodiment of the present application refers to a method of sending information to a terminal based on a request from the terminal. For a terminal, the on-demand method in each embodiment of the present application refers to a method of obtaining information only after a request is sent.

[0153] In an embodiment of the present application, information used to indicate part or all of the information (the part or all of the information is part or all of the information in the system information (e.g., SIB28 and / or SIB29) used to carry SL configuration information) can be placed in the system information (e.g., MIB, MIB-SL-V2X, or SIB1) in the present application and sent to the terminal, so that the terminal can obtain some information that cannot be obtained in a non-on-demand manner. The information used to indicate part or all of the information can be information that directly indicates the part or all of the information, or information that indirectly indicates the part or all of the information, and this application does not limit this.

[0154] 303. The terminal determines the priority of the frequency point used by the neighboring cell according to the SL configuration information of the neighboring cell.

[0155] Optionally, after step 303, the method further includes:

[0156] 304. The terminal reselects a cell according to the priority of the frequency points used by the neighboring cells.

[0157] The specific implementation of step 304 can be found in the prior art and will not be described in detail here.

[0158] In the method provided in Example 1, the neighboring cell can send system information containing the SL configuration information of the neighboring cell to the terminal in a non-on-demand manner. In this case, the terminal performing SL communication can directly obtain the SL configuration information of the neighboring cell in the first cell without having to reside in the neighboring cell, which can facilitate the terminal to reselect the cell based on the SL configuration information of the neighboring cell (that is, it can solve the above-mentioned problem 1). In addition, the terminal does not need to read the SIB carrying the NR SL configuration and / or LTE SL configuration, which can avoid increasing the power consumption of the terminal (that is, it can solve the above-mentioned problem 2).

[0159] In addition, the terminal can determine the priority of the frequency points used by the neighboring cell based on the SL configuration information of the neighboring cell to facilitate cell reselection. For example, the terminal can set the priority of the frequency points used by the neighboring cell that meets the SL communication requirements higher, thereby ensuring that the cell to which the terminal reselects meets the terminal's SL communication requirements.

[0160] Optionally, the SL configuration information of the neighboring cell includes one or more of the following information:

[0161] Information 1: Whether the neighboring cell provides SL resource configuration;

[0162] Information 2: Whether the neighboring cell only provides information about the anchor carrier;

[0163] Information 3: whether the neighboring cell provides SL resource configuration using the first RAT;

[0164] Information 4: whether the neighboring cell provides SL resource configuration using the second RAT;

[0165] Information 5: Whether the neighboring cell provides only the anchor carrier for the SL using the first RAT;

[0166] Information 6: Whether the neighboring cell provides only the anchor carrier for the SL using the second RAT.

[0167] Exemplarily, the first RAT may be LTE, and the second RAT may be NR.

[0168] Optionally, the SL resource configuration includes SL sending resource configuration and / or SL receiving resource configuration.

[0169] Optionally, the SL resource configuration includes intra-carrier SL resource configuration (i.e., the SL resource configuration carried in the intra-carrier SL configuration) and / or inter-carrier SL resource configuration (i.e., the SL resource configuration carried in the inter-carrier SL configuration). Exemplarily, the intra-carrier SL resource configuration of the neighboring cell refers to the SL resource configuration of the same frequency point as the frequency point adopted by the neighboring cell, or the SL resource configuration on the same carrier as the carrier adopted by the neighboring cell; the inter-carrier SL resource configuration of the neighboring cell refers to the SL resource configuration of a frequency point different from the frequency point adopted by the neighboring cell, or the SL resource configuration on the adjacent frequency of the frequency point adopted by the neighboring cell, or the SL resource configuration on a carrier different from the carrier adopted by the neighboring cell. Among them, the frequency point or carrier adopted by the neighboring cell may be the frequency point or carrier adopted by the neighboring cell at the Uu port.

[0170] The following first introduces the above information 1 to information 6 respectively.

[0171] Information 1

[0172] In information 1, the neighboring cell providing SL resource configuration means one of the following:

[0173] Meaning 1. Neighboring cells provide intra-carrier SL resource configuration;

[0174] Meaning 2: Neighboring cells provide inter-carrier SL resource configuration;

[0175] Meaning 3: Neighboring cells provide intra-carrier SL resource configuration and inter-carrier SL resource configuration.

[0176] The neighboring cell does not provide SL resource configuration, which means that the neighboring cell does not provide intra-carrier SL resource configuration and inter-carrier SL resource configuration.

[0177] In addition, optionally, the neighboring cell not providing SL resource configuration only means that the neighboring cell does not provide SL resource configuration through system information, but whether the SL resource configuration is provided through other information is not restricted. For example, the neighboring cell not providing SL resource configuration means that the neighboring cell does not provide SL resource configuration through system information or through dedicated signaling; or, the neighboring cell not providing SL resource configuration means that the neighboring cell does not provide SL resource configuration through system information, but provides SL resource configuration through dedicated signaling.

[0178] The SL resource configuration provided by system information is a resource pool configuration (eg, mode 2 or mode 4 resource pool configuration). The SL resource configuration provided by dedicated signaling can be a resource pool configuration or a non-resource pool configuration (eg, mode 1 or mode 3 resource configuration).

[0179] It should be noted that when the neighboring cell does not provide SL resource configuration, it may provide an anchor carrier or may not provide an anchor carrier.

[0180] In information 1, one bit is optionally used to indicate whether the neighboring cell provides SL resource configuration. For example, when the value of this bit is 0, it indicates that the neighboring cell does not provide SL resource configuration. When the value of this bit is 1, it indicates that the neighboring cell provides SL resource configuration. The opposite is also true.

[0181] In information 1, in one case, further, multiple bits (e.g., 2 bits) may be used to indicate whether the neighboring cell provides intra-carrier SL resource configuration and / or inter-carrier SL resource configuration. For example, one of the two bits may be used to indicate whether the neighboring cell provides intra-carrier SL resource configuration, and the other of the two bits may be used to indicate whether the neighboring cell provides inter-carrier SL resource configuration. For another example, different values ​​of the two bits may be used for distinction: 00 indicates that only intra-carrier SL resource configuration is provided, 01 indicates that only inter-carrier SL resource configuration is provided, and 10 indicates that both intra-carrier SL resource configuration and inter-carrier SL resource configuration are provided.

[0182] In information 1, in another case, further, multiple bits (e.g., 3 bits) may be used to indicate whether the neighboring cell provides intra-carrier SL resource configuration, inter-carrier SL resource configuration, and an anchor carrier. For example, the first of the 3 bits may indicate whether the neighboring cell provides intra-carrier SL resource configuration, the second of the 3 bits may indicate whether the neighboring cell provides inter-carrier SL resource configuration, and the third of the 3 bits may indicate whether the neighboring cell provides an anchor carrier. For another example, different values ​​of 3 bits are used for distinction: 000 indicates that only intra-carrier SL resource configuration is provided, 001 indicates that only inter-carrier SL resource configuration is provided, 010 indicates that only anchor carrier is provided, 011 indicates that both intra-carrier SL resource configuration and inter-carrier SL resource configuration are provided, 100 indicates that both intra-carrier SL resource configuration and anchor carrier are provided, 101 indicates that both inter-carrier SL resource configuration and anchor carrier are provided, and 111 indicates that both intra-carrier SL resource configuration, inter-carrier SL resource configuration and anchor carrier are provided.

[0183] Information 2

[0184] In information 2, "the neighboring cell only provides an anchor carrier" indicates that the neighboring cell only provides an anchor carrier and does not provide SL configuration (naturally, it does not provide SL resource configuration). "The neighboring cell not only provides an anchor carrier" indicates that the neighboring cell may also provide SL resource configuration or other information in addition to providing an anchor carrier.

[0185] In information 2, one bit may optionally be used to indicate whether the neighboring cell provides only the anchor carrier. For example, if the bit value is 0, it indicates that the neighboring cell provides only the anchor carrier, and if the bit value is 1, it indicates that the neighboring cell provides more than just the anchor carrier. The reverse is also true.

[0186] Information 3

[0187] In information 3, one bit is optionally used to indicate whether the neighboring cell provides SL resource configuration using the first RAT. For example, when the value of this bit is 0, it indicates that the neighboring cell provides SL resource configuration using the first RAT. When the value of this bit is 1, it indicates that the neighboring cell does not provide SL resource configuration using the first RAT. The opposite is also true.

[0188] In information 3, in one case, further, multiple bits (for example, 2 bits) may be used to indicate whether the neighboring cell provides intra-carrier SL resource configuration using the first RAT and / or inter-carrier SL resource configuration using the first RAT. For example, one of the two bits may be used to indicate whether the neighboring cell provides intra-carrier SL resource configuration using the first RAT, and the other of the two bits may be used to indicate whether the neighboring cell provides inter-carrier SL resource configuration using the first RAT. For another example, different values ​​of the two bits may be used for distinction: 00 indicates that only the intra-carrier SL resource configuration using the first RAT is provided, 01 indicates that only the inter-carrier SL resource configuration using the first RAT is provided, and 10 indicates that both the intra-carrier SL resource configuration using the first RAT and the inter-carrier SL resource configuration using the first RAT are provided.

[0189] In information 3, in another case, further, multiple bits (for example, 3 bits) may be used to indicate whether the neighboring cell provides an intra-carrier SL resource configuration using the first RAT, an inter-carrier SL resource configuration using the first RAT, and an anchor carrier using the first RAT. For example, the first of the 3 bits may be used to indicate whether the neighboring cell provides an intra-carrier SL resource configuration using the first RAT, the second of the 3 bits may be used to indicate whether the neighboring cell provides an inter-carrier SL resource configuration using the first RAT, and the third of the 3 bits may be used to indicate whether the neighboring cell provides an anchor carrier using the first RAT. For another example, different values ​​of 3 bits are used for distinction: 000 indicates that only the intra-carrier SL resource configuration using the first RAT is provided; 001 indicates that only the inter-carrier SL resource configuration using the first RAT is provided; 010 indicates that only the anchor carrier using the first RAT is provided; 011 indicates that both the intra-carrier SL resource configuration using the first RAT and the inter-carrier SL resource configuration using the first RAT are provided; 100 indicates that both the intra-carrier SL resource configuration using the first RAT and the anchor carrier using the first RAT are provided; 101 indicates that both the inter-carrier SL resource configuration using the first RAT and the anchor carrier using the first RAT are provided; and 111 indicates that both the intra-carrier SL resource configuration using the first RAT, the inter-carrier SL resource configuration using the first RAT, and the anchor carrier using the first RAT are provided.

[0190] Information 4

[0191] In information 4, one bit is optionally used to indicate whether the neighboring cell provides SL resource configuration using the second RAT. For example, when the value of this bit is 0, it indicates that the neighboring cell provides SL resource configuration using the second RAT. When the value of this bit is 1, it indicates that the neighboring cell does not provide SL resource configuration using the second RAT. The opposite is also true.

[0192] In information 4, in one case, further, multiple bits (for example, 2 bits) may be used to indicate whether the neighboring cell provides intra-carrier SL resource configuration using the second RAT and / or inter-carrier SL resource configuration using the second RAT. For example, one of the two bits may be used to indicate whether the neighboring cell provides intra-carrier SL resource configuration using the second RAT, and the other of the two bits may be used to indicate whether the neighboring cell provides inter-carrier SL resource configuration using the second RAT. For another example, different values ​​of the two bits may be used for distinction: 00 indicates that only the intra-carrier SL resource configuration using the second RAT is provided; 01 indicates that only the inter-carrier SL resource configuration using the second RAT is provided; and 10 indicates that both the intra-carrier SL resource configuration using the second RAT and the inter-carrier SL resource configuration using the second RAT are provided.

[0193] In information 4, in another case, further, multiple bits (for example, 3 bits) may be used to indicate whether the neighboring cell provides an intra-carrier SL resource configuration using the second RAT, an inter-carrier SL resource configuration using the second RAT, and an anchor carrier using the second RAT. For example, the first of the 3 bits may be used to indicate whether the neighboring cell provides an intra-carrier SL resource configuration using the second RAT, the second of the 3 bits may be used to indicate whether the neighboring cell provides an inter-carrier SL resource configuration using the second RAT, and the third of the 3 bits may be used to indicate whether the neighboring cell provides an anchor carrier using the second RAT. For another example, different values ​​of 3 bits are used for distinction: 000 indicates that only the intra-carrier SL resource configuration using the second RAT is provided; 001 indicates that only the inter-carrier SL resource configuration using the second RAT is provided; 010 indicates that only the anchor carrier using the second RAT is provided; 011 indicates that both the intra-carrier SL resource configuration using the second RAT and the inter-carrier SL resource configuration using the second RAT are provided; 100 indicates that both the intra-carrier SL resource configuration using the second RAT and the anchor carrier using the second RAT are provided; 101 indicates that both the inter-carrier SL resource configuration using the second RAT and the anchor carrier using the second RAT are provided; and 111 indicates that both the intra-carrier SL resource configuration using the second RAT, the inter-carrier SL resource configuration using the second RAT, and the anchor carrier using the second RAT are provided.

[0194] Information 5

[0195] In information 5, "The neighboring cell only provides an anchor carrier for the SL using the first RAT" indicates that the neighboring cell only provides an anchor carrier using the first RAT and does not provide SL resource configuration for the first RAT. "The neighboring cell not only provides an anchor carrier for the SL using the first RAT" indicates that the neighboring cell may also provide SL resource configuration for the first RAT in addition to providing an anchor carrier using the first RAT.

[0196] Optionally, in information 5, one bit is used to indicate whether the neighboring cell provides only the anchor carrier for the SL using the first RAT. For example, if the value of this bit is 0, it indicates that the neighboring cell provides only the anchor carrier for the SL using the first RAT. If the value of this bit is 1, it indicates that the neighboring cell provides not only the anchor carrier for the SL using the first RAT. The reverse is also true.

[0197] Information 6

[0198] In information 6, "The neighboring cell only provides an anchor carrier for the SL using the second RAT" indicates that the neighboring cell only provides an anchor carrier using the second RAT and does not provide SL resource configuration for the second RAT. "The neighboring cell not only provides an anchor carrier for the SL using the second RAT" indicates that the neighboring cell may also provide SL resource configuration for the second RAT in addition to providing an anchor carrier using the second RAT.

[0199] Optionally, in information 6, one bit is used to indicate whether the neighboring cell provides only the anchor carrier for the SL using the second RAT. For example, if the value of this bit is 0, it indicates that the neighboring cell provides only the anchor carrier for the SL using the second RAT. If the value of this bit is 1, it indicates that the neighboring cell provides not only the anchor carrier for the SL using the second RAT. The reverse is also possible.

[0200] For information 3 and information 4, in addition to using one bit to indicate whether the neighboring cell provides SL resource configuration using the first RAT and another bit to indicate whether the neighboring cell provides SL resource configuration using the second RAT, different values ​​of multiple bits can also be used to indicate whether the neighboring cell provides SL resource configuration using the first RAT and / or the second RAT. For example, 00 indicates that only SL resource configuration using the first RAT is provided, 01 indicates that only SL resource configuration using the second RAT is provided, and 10 indicates that SL resource configuration using both the first RAT and the second RAT is provided. Information 5 and information 6 are similar and will not be repeated here.

[0201] In the above embodiment, when the neighboring cell supports only one RAT, in one case, the SL configuration information of the neighboring cell may include only information 1 or information 3 (in this case, the RAT supported by the neighboring cell is the first RAT) or information 4 (in this case, the RAT supported by the neighboring cell is the second RAT), and the terminal can determine whether the neighboring cell provides SL resource configuration based on information 1, information 3, or information 4. In another case, the SL configuration information of the neighboring cell may include multiple information from information 1 to information 4, and the terminal determines whether the neighboring cell provides SL resource configuration based on one or more of the multiple information.

[0202] When the neighboring cell supports both the first RAT and the second RAT, in one case, the SL configuration information of the neighboring cell may include only information 3 and information 4, or may include both information 3 and information 4, and also include information 1 and / or information 2.

[0203] In addition, when the neighboring cell supports more than two (for example, three or five) RATs, the SL configuration information of the neighboring cell also includes information on whether the neighboring cell provides SL resource configuration using other RATs (for example, future evolved RATs) in addition to the first RAT and the second RAT. At this time, for each RAT, one bit can be used to indicate whether the neighboring cell provides information on SL resource configuration using the RAT, or different values ​​of multiple bits (for example, three or five bits) can be used to indicate whether the neighboring cell provides SL resource configuration using one or more of the multiple RATs.

[0204] When the information contained in the SL configuration information of the neighboring cell is different, the implementation of step 303 is also different, which is explained below through cases 1 to 4 respectively.

[0205] Case 1: The SL configuration information of the neighboring cell includes at least information 1.

[0206] In case 1, step 303, when implemented specifically, includes: when the terminal determines that the neighboring cell provides SL resource configuration based on the SL configuration information of the neighboring cell, the terminal determines the frequency used by the neighboring cell as the frequency with the highest priority.

[0207] Specifically, the terminal determines whether the neighboring cell provides SL resource configuration based on information 1.

[0208] In case 1, optionally, the terminal satisfies one or more of the following conditions: the terminal has sidelink communication capability, the terminal is configured to perform sidelink communication, and the terminal is authorized to perform sidelink communication.

[0209] Case 2: The SL configuration information of the neighboring cell includes at least information 2.

[0210] In case 2, step 303, when implemented specifically, includes: when the terminal determines that the neighboring cell does not provide SL resource configuration based on the SL configuration information of the neighboring cell, the terminal does not determine the frequency used by the neighboring cell as the frequency with the highest priority.

[0211] Specifically, the terminal determines based on information 2 that the neighboring cell does not provide SL resource configuration.

[0212] In case 2, optionally, the terminal has SL communication capability and is configured to perform SL communication.

[0213] Case 3: The SL configuration information of the neighboring cell includes at least information 3 and information 4.

[0214] In case 3, step 303, when implemented, includes:

[0215] When the terminal is configured to use both the first RAT and the second RAT for SL communication, the terminal determines the frequency used by the neighboring cell that provides both the SL resource configuration using the first RAT and the SL resource configuration using the second RAT as the frequency with the highest priority; or

[0216] When the terminal is configured to use only the first RAT for SL communication, the terminal determines the frequency used by the neighboring cell that provides the SL resource configuration using the first RAT (in this case, the neighboring cell may provide the SL resource configuration using the second RAT or may not provide the SL resource configuration using the second RAT) as the frequency with the highest priority; or

[0217] When the terminal is configured to use only the second RAT for SL communication, the terminal will determine the frequency used by the neighboring cell that uses the SL resource configuration of the second RAT (in this case, the neighboring cell may or may not provide the SL resource configuration of the first RAT) as the frequency with the highest priority.

[0218] Case 4: The SL configuration information of the neighboring cell includes at least information 5 and information 6.

[0219] In case 4, step 303, when implemented, includes:

[0220] When the terminal is configured to use both the first RAT and the second RAT for SL communication, the terminal determines the frequency used by the neighboring cell that provides only the anchor carrier for the SL using the first RAT and / or provides only the anchor carrier for the SL using the second RAT as the frequency with the highest priority; or

[0221] In the case where the terminal is configured to use only the first RAT for SL communication, the terminal will not determine the frequency used by the neighboring cell that only provides the anchor carrier for SL using the first RAT as the frequency with the highest priority; or,

[0222] In the case that the terminal is configured to use only the second RAT for SL communication, the terminal will not determine the frequency used by the neighboring cell that only provides the anchor carrier for SL using the first RAT as the frequency with the highest priority.

[0223] In Case 3 and Case 4, when the terminal is configured to use both the first RAT and the second RAT for SL communication, the terminal satisfies one or more of the following conditions: the terminal has the ability to use both the first RAT and the second RAT for SL communication; the terminal is authorized to perform SL communication using the first RAT and the second RAT.

[0224] In Case 3 and Case 4, when the terminal is configured to use only the first RAT for SL communication, the terminal satisfies one or more of the following conditions: the terminal has the capability of using the first RAT for SL communication, and the terminal is authorized to use the first RAT for SL communication.

[0225] In Case 3 and Case 4, when the terminal is configured to use only the second RAT for SL communication, the terminal satisfies one or more of the following conditions: the terminal has the capability of using the second RAT for SL communication, and the terminal is authorized to use the second RAT for SL communication.

[0226] Optionally, in the first case, the SL configuration information of the neighboring cell includes one or more of the following information:

[0227] Information 7: QoS profile index corresponding to the SLRB configuration provided by the neighboring cell;

[0228] Information 8: Whether the neighboring cell has enabled the SLRB configuration for hybrid automatic repeat request (HARQ);

[0229] Information 9: Whether the neighboring cell has SLRB configured in radio link control (RLC) acknowledged mode (AM);

[0230] Information 10: SL resource pool index provided by the neighboring cell;

[0231] Information 11: The lowest CBR index of the SL resource pool provided by the neighboring cell;

[0232] Information 12: whether the neighboring cell has synchronization reference source configuration information;

[0233] Information 13: SL resource configuration provided by neighboring cells;

[0234] Information 14: SLRB configuration provided by the neighboring cell;

[0235] Information 15: Synchronization reference source configuration provided by the neighboring cell.

[0236] Among them, for information 7, the terminal can determine whether the SLRB configuration provided by the neighboring cell meets the Qos requirements of the SL service (for example, V2X service) based on information 7.

[0237] Regarding information 8, the terminal can determine whether the neighboring cell provides the HARQ function of SL based on information 8.

[0238] With respect to information 9, the terminal can determine whether the neighboring cell adopts the AM mode in the RLC layer of the SL based on information 9.

[0239] Regarding information 10, the terminal can determine the index of the resource pool provided by the neighboring cell based on information 10. The index size of the resource pool corresponds to the size of the resource pool. Therefore, the terminal can indirectly determine the size of the resource pool provided by the neighboring cell based on information 10.

[0240] With respect to information 11, the terminal may determine, based on information 11, a resource pool having the lowest CBR among at least one SL resource pool in a neighboring cell.

[0241] With respect to information 12, the terminal can determine whether a neighboring cell has a synchronization reference source based on information 12.

[0242] Regarding information 13, the terminal can determine the SL resource configuration of the neighboring cell based on information 13.

[0243] Regarding information 14, the terminal can determine the SLRB configuration provided by the neighboring cell based on information 14.

[0244] Regarding information 15, the terminal can determine the synchronization reference source provided by the neighboring cell based on information 15.

[0245] Based on the first case, a possible implementation method is that the SL configuration information of the neighboring cell includes one or more of information 1 to information 15. In this case, step 303 may include in the specific implementation: when the terminal is configured to transmit services on the SL, the terminal determines the frequency used by the neighboring cell that meets the service requirements in the neighboring cell as the frequency with the highest priority based on the SL configuration information of the neighboring cell.

[0246] Based on the first case, in another possible implementation, during the specific implementation of step 303, the terminal determines the highest priority frequency based on one or more of information 1 to information 6 in the SL configuration information of the neighboring cell. If there are multiple highest priority frequencies, the terminal further determines the relative priority of the highest priority frequency based on one or more of information 7 to information 15. Specifically, when the terminal is configured to transmit services on the SL, the terminal determines that the neighboring cell that meets the service requirements has a higher relative priority in the set of highest priority frequencies based on one or more of information 7 to information 15 in the SL configuration information of the neighboring cell. This possible implementation can more accurately determine the priority of the frequencies used by the neighboring cells.

[0247] Based on the first case, when the service demand includes M1 (M1 is an integer greater than 0) requirements, the neighboring cell meeting the service demand may mean that the SL configuration information of the neighboring cell meets N1 (N1 is an integer greater than 0 and less than or equal to M1) requirements in the M1 requirements. The value of N1 can be preset or predefined or specified by the protocol or determined according to the value of M1. For example, when the SL configuration information of the neighboring cell meets all the requirements in the M1 requirements, the neighboring cell meets the service demand. For another example, when the SL configuration information of the neighboring cell meets any one of the M1 requirements, the neighboring cell meets the service demand. For example, if the QoS requirement of the terminal's service requires that the corresponding SLRB configuration adopts RLC AM, then when the terminal determines that the neighboring cell can provide an SLRB configuration that adopts RLC AM based on the SL configuration information of a certain neighboring cell, it is considered that the neighboring cell can meet the service demand of the terminal.

[0248] Optionally, in the second case, the system information may include auxiliary information of the neighboring cells, and the auxiliary information of the neighboring cells includes one or more of the above-mentioned information 7 to information 15.

[0249] Based on the second situation, when step 303 is implemented, the terminal determines the frequency with the highest priority based on one or more of information 1 to information 6 in the SL configuration information of the neighboring area, and then determines the neighboring area that does not meet the business needs in the neighboring area corresponding to the frequency with the highest priority based on one or more of information 7 to information 15, and removes the frequency used by the neighboring area that does not meet the business needs from the frequency with the highest priority, or removes the neighboring area that does not meet the business needs from the candidate cell list (i.e., a list of cells that meet the S criterion).

[0250] Based on the second case, when the service demand includes M2 (M2 is an integer greater than 0) requirements, the neighboring cell not meeting the service demand may mean that the SL configuration information of the neighboring cell does not meet the N2 (N2 is an integer greater than 0 and less than or equal to M2) requirements in the M2 requirements. The value of N2 can be preset or predefined or specified by the protocol or determined according to the value of M2. For example, when the SL configuration information of the neighboring cell does not meet all the requirements in the M2 requirements, the neighboring cell does not meet the service demand. For another example, when the SL configuration information of the neighboring cell does not meet any one of the M2 requirements, the neighboring cell does not meet the service demand. For example, if the QoS requirement of the terminal's service corresponds to the SLRB configuration using RLC AM, when the terminal determines that the neighboring cell cannot provide the SLRB configuration using RLC AM based on the SL configuration information of a neighboring cell, it is considered that the neighboring cell does not meet the service demand of the terminal.

[0251] Example 2

[0252] The main difference between Example 2 and Example 1 is that in Example 1, the terminal obtains the SL configuration information of the neighboring cell through the neighboring cell, while in Example 2, the terminal obtains the SL configuration information of the neighboring cell through the first cell.

[0253] For details, see Figure 4 The communication method provided in the second embodiment includes:

[0254] 401. Generate system information, where the system information includes SL configuration information of a neighboring cell. SL is a direct communication link between two terminals.

[0255] In step 401, the system information may be generated by the network device to which the first cell belongs (or the network device providing the first cell), or may be generated by the first cell. Figure 4 The first cell generation is taken as an example for drawing.

[0256] The SL configuration information of the neighboring cell includes one or more of the following information:

[0257] Information 1: Whether the neighboring cell provides SL resource configuration;

[0258] Information 2: Whether the neighboring cell only provides information about the anchor carrier;

[0259] Information 3: whether the neighboring cell provides SL resource configuration using the first RAT;

[0260] Information 4: whether the neighboring cell provides SL resource configuration using the second RAT;

[0261] Information 5: Whether the neighboring cell provides only the anchor carrier for the SL using the first RAT;

[0262] Information 6: Whether the neighboring cell provides only the anchor carrier for the SL using the second RAT.

[0263] For the relevant description of the SL configuration information of the neighboring cells, please refer to Example 1 and will not be repeated here.

[0264] Optionally, the first cell obtains the SL configuration information of the neighboring cell through the interface between the network device to which the first cell belongs and the network device to which the neighboring cell belongs.

[0265] The network device to which the first cell belongs obtains the SL configuration information of one or more neighboring cells through an interface with the network device to which the neighboring cell belongs (when both network devices are eNBs, the interface may be an X2 interface; when both network devices are gNBs, or one network device is a gNB and the other network device is an ng-eNB, the interface may be an Xn interface). If the SL configuration information of the neighboring cell is updated, the network device to which the neighboring cell belongs also sends the updated SL configuration information to the network device to which the first cell belongs through the interface.

[0266] 402. A first cell sends system information to a terminal located in the first cell. Correspondingly, the terminal receives the system information from the first cell.

[0267] If there are multiple neighboring cells, the first cell may send system information including SL configuration information of multiple neighboring cells to the terminal.

[0268] 403. The terminal determines the priority of the frequency point used by the neighboring cell according to the SL configuration information of the neighboring cell.

[0269] Among them, when the information contained in the SL configuration information of the neighboring cell is different, the implementation of step 403 is also different. For details, please refer to Cases 1 to 4 in Example 1.

[0270] Optionally, after step 403, the method further includes:

[0271] 404. The terminal reselects a cell according to the priority of the frequencies used by the neighboring cells.

[0272] In the method provided in Example 2, the first cell can send system information containing the SL configuration information of the neighboring cell to the terminal. In this case, the terminal performing SL communication can directly obtain the SL configuration information of the neighboring cell without having to reside in the neighboring cell, which can facilitate the terminal to reselect the cell based on the SL configuration information of the neighboring cell (i.e., it can solve the above-mentioned problem 1). In addition, the terminal does not need to read the SIB carrying the NR SL configuration and / or LTE SL configuration, which can avoid increasing the power consumption of the terminal (i.e., it can solve the above-mentioned problem 2).

[0273] In addition, the terminal can determine the priority of the frequency points used by the neighboring cell based on the SL configuration information of the neighboring cell to facilitate cell reselection. For example, the terminal can set the priority of the frequency points used by the neighboring cell that meets the SL communication requirements higher, thereby ensuring that the cell to which the terminal reselects meets the terminal's SL communication requirements.

[0274] Optionally, in specific implementation, step 402 includes: the first cell sending system information to the terminal in an on-demand manner or a non-on-demand manner. Correspondingly, the terminal receives system information from the first cell in an on-demand manner or a non-on-demand manner.

[0275] If the first cell and the terminal send and receive system information in an on-demand manner, step 402 may specifically include: the terminal sending a request message to the first cell, where the request message is used to request SL configuration information of a neighboring cell; the first cell receiving the request message from the terminal, sending system information to the terminal based on the request message, and the terminal receiving the system information from the first cell. The system information may be a system information block (e.g., an intra-frequency cell reselection SIB (e.g., SIB3), an inter-frequency cell reselection SIB (e.g., SIB4), or a V2X-SIB) sent in an on-demand manner.

[0276] If the first cell and the terminal send and receive system information in a non-on-demand manner, step 402 may specifically include: the first cell directly sends the system information to the terminal, and the terminal directly receives the system information from the first cell. The system information may be a system information block (e.g., MIB, MIB-SL-V2X, SIB1, etc.) that cannot be sent in an on-demand manner.

[0277] Optionally, in the first case, the SL configuration information of the neighboring cell includes one or more of the following information:

[0278] Information 7: QoS profile index corresponding to the SLRB configuration provided by the neighboring cell;

[0279] Information 8: Whether the neighboring cell has enabled the SLRB configuration for hybrid automatic repeat request (HARQ);

[0280] Information 9: Whether the neighboring cell has SLRB configured in radio link control (RLC) acknowledged mode (AM);

[0281] Information 10: SL resource pool index provided by the neighboring cell;

[0282] Information 11: The lowest CBR index of the SL resource pool provided by the neighboring cell;

[0283] Information 12: whether the neighboring cell has synchronization reference source configuration information;

[0284] Information 13: SL resource configuration provided by neighboring cells;

[0285] Information 14: SLRB configuration provided by the neighboring cell;

[0286] Information 15: Synchronization reference source configuration provided by the neighboring cell.

[0287] Among them, for information 7, the terminal can determine whether the SLRB configuration provided by the neighboring cell meets the Qos requirements of the SL service (for example, V2X service) based on information 7.

[0288] Regarding information 8, the terminal can determine whether the neighboring cell provides the HARQ function of SL based on information 8.

[0289] With respect to information 9, the terminal can determine whether the neighboring cell adopts the AM mode in the RLC layer of the SL based on information 9.

[0290] Regarding information 10, the terminal can determine the index of the resource pool provided by the neighboring cell based on information 10. The index size of the resource pool corresponds to the size of the resource pool. Therefore, the terminal can indirectly determine the size of the resource pool provided by the neighboring cell based on information 10.

[0291] With respect to information 11, the terminal may determine, based on information 11, a resource pool having the lowest CBR among at least one SL resource pool in a neighboring cell.

[0292] With respect to information 12, the terminal can determine whether a neighboring cell has a synchronization reference source based on information 12.

[0293] Regarding information 13, the terminal can determine the SL resource configuration of the neighboring cell based on information 13.

[0294] Regarding information 14, the terminal can determine the SLRB configuration provided by the neighboring cell based on information 14.

[0295] Regarding information 15, the terminal can determine the synchronization reference source provided by the neighboring cell based on information 15.

[0296] Based on the first case, a possible implementation method is that the SL configuration information of the neighboring cell includes one or more of information 1 to information 15. In this case, step 303 may include in the specific implementation: when the terminal is configured to transmit services on the SL, the terminal determines the frequency used by the neighboring cell that meets the service requirements in the neighboring cell as the frequency with the highest priority based on the SL configuration information of the neighboring cell.

[0297] Based on the first case, in another possible implementation, during the specific implementation of step 303, the terminal determines the highest priority frequency based on one or more of information 1 to information 6 in the SL configuration information of the neighboring cell. If there are multiple highest priority frequencies, the terminal further determines the relative priority of the highest priority frequency based on one or more of information 7 to information 15. Specifically, when the terminal is configured to transmit services on the SL, the terminal determines that the neighboring cell that meets the service requirements has a higher relative priority in the set of highest priority frequencies based on one or more of information 7 to information 15 in the SL configuration information of the neighboring cell. This possible implementation can more accurately determine the priority of the frequencies used by the neighboring cells.

[0298] Based on the first case, when the service demand includes M1 (M1 is an integer greater than 0) requirements, the neighboring cell meeting the service demand may mean that the SL configuration information of the neighboring cell meets N1 (N1 is an integer greater than 0 and less than or equal to M1) requirements in the M1 requirements. The value of N1 can be preset or predefined or specified by the protocol or determined according to the value of M1. For example, when the SL configuration information of the neighboring cell meets all the requirements in the M1 requirements, the neighboring cell meets the service demand. For another example, when the SL configuration information of the neighboring cell meets any one of the M1 requirements, the neighboring cell meets the service demand. For example, if the QoS requirement of the terminal's service requires that the corresponding SLRB configuration adopts RLC AM, then when the terminal determines that the neighboring cell can provide an SLRB configuration that adopts RLC AM based on the SL configuration information of a certain neighboring cell, it is considered that the neighboring cell can meet the service demand of the terminal.

[0299] Optionally, in the second case, the system information may include auxiliary information of the neighboring cells, and the auxiliary information of the neighboring cells includes one or more of the above-mentioned information 7 to information 15.

[0300] Based on the second situation, when step 303 is implemented, the terminal determines the frequency with the highest priority based on one or more of information 1 to information 6 in the SL configuration information of the neighboring area, and then determines the neighboring area that does not meet the business needs in the neighboring area corresponding to the frequency with the highest priority based on one or more of information 7 to information 15, and removes the frequency used by the neighboring area that does not meet the business needs from the frequency with the highest priority, or removes the neighboring area that does not meet the business needs from the candidate cell list (i.e., a list of cells that meet the S criterion).

[0301] Based on the second case, when the service demand includes M2 (M2 is an integer greater than 0) requirements, the neighboring cell not meeting the service demand may mean that the SL configuration information of the neighboring cell does not meet the N2 (N2 is an integer greater than 0 and less than or equal to M2) requirements in the M2 requirements. The value of N2 can be preset or predefined or specified by the protocol or determined according to the value of M2. For example, when the SL configuration information of the neighboring cell does not meet all the requirements in the M2 requirements, the neighboring cell does not meet the service demand. For another example, when the SL configuration information of the neighboring cell does not meet any one of the M2 requirements, the neighboring cell does not meet the service demand. For example, if the QoS requirement of the terminal's service corresponds to the SLRB configuration using RLC AM, when the terminal determines that the neighboring cell cannot provide the SLRB configuration using RLC AM based on the SL configuration information of a neighboring cell, it is considered that the neighboring cell does not meet the service demand of the terminal.

[0302] Example 3

[0303] In the third embodiment, the neighboring cell or the first cell sends system information to the terminal, and the terminal determines whether the neighboring cell meets the service requirement based on the system information.

[0304] See also Figure 5 The communication method provided in the third embodiment includes:

[0305] 501. A terminal receives system information, where the system information includes SL configuration information of a neighboring cell. SL is a direct communication link between two terminals.

[0306] If there are multiple neighboring cells, the terminal may receive one system information, which may include SL configuration information of multiple neighboring cells, or the terminal may receive multiple system information, where one system information includes SL configuration information of one or more neighboring cells. The system information may also be a system information block.

[0307] The SL configuration information of the neighboring cell includes one or more of the following information:

[0308] Information 1: Whether the neighboring cell provides SL resource configuration;

[0309] Information 2: Whether the neighboring cell only provides information about the anchor carrier;

[0310] Information 3: whether the neighboring cell provides SL resource configuration using the first RAT;

[0311] Information 4: whether the neighboring cell provides SL resource configuration using the second RAT;

[0312] Information 5: Whether the neighboring cell provides only the anchor carrier for the SL using the first RAT;

[0313] Information 6: Whether the neighboring cell provides only the anchor carrier for the SL using the second RAT;

[0314] Information 7: QoS profile index corresponding to the SLRB configuration provided by the neighboring cell;

[0315] Information 8: Whether the neighboring cell has HARQ-enabled SLRB configuration information;

[0316] Information 9: Whether the neighboring cell uses SLRB configuration using RLC AM;

[0317] Information 10: SL resource pool index provided by the neighboring cell;

[0318] Information 11: The lowest CBR index of the SL resource pool provided by the neighboring cell;

[0319] Information 12: whether the neighboring cell has synchronization reference source configuration information;

[0320] Information 13: SL resource configuration provided by neighboring cells;

[0321] Information 14: SLRB configuration provided by the neighboring cell;

[0322] Information 15: Synchronization reference source configuration provided by the neighboring cell.

[0323] Among them, the relevant description of the information contained in the SL configuration information of the neighboring area can be found in Example 1 and will not be repeated here.

[0324] 502. The terminal determines whether the neighboring cell meets the service requirements based on the SL configuration information of the neighboring cell.

[0325] According to the method provided in Example 3, the terminal performing SL communication can obtain the SL configuration information of the neighboring cell, and can determine whether the neighboring cell meets the service requirements based on the SL configuration information of the neighboring cell. In this case, the terminal can reselect to the neighboring cell that meets the service requirements, thereby preventing subsequent connection establishment or connection recovery, avoiding increasing the power consumption of the terminal, and improving the service transmission performance and continuity (that is, it can solve the above-mentioned problem 3).

[0326] Optionally, step 501 may be implemented in the following manner 1 or manner 2.

[0327] Method 1: Generate system information and send the system information to the terminal in a non-on-demand manner. The terminal receives the system information from the neighboring cell in a non-on-demand manner.

[0328] In the first approach, the system information may be generated by the network device to which the neighboring cell belongs (or the network device providing the neighboring cell), or may be generated by the neighboring cell.

[0329] In specific implementation, the first method may include: the neighboring cell directly sends system information to the terminal, and the terminal directly receives the system information from the neighboring cell. When the non-on-demand method is a broadcast method, the neighboring cell broadcasts the system information, and the terminal receives the system information broadcast by the neighboring cell.

[0330] In method 1, the system information may be a system information block (eg, MIB, MIB-SL-V2X, SIB1, etc.) that cannot be sent on demand.

[0331] In an embodiment of the present application, information used to indicate part or all of the information (the part or all of the information is part or all of the information in the system information (e.g., SIB28 and / or SIB29) used to carry SL configuration information) can be placed in the system information (e.g., MIB, MIB-SL-V2X, or SIB1) in the present application and sent to the terminal, so that the terminal can obtain some information that cannot be obtained in a non-on-demand manner. The information used to indicate part or all of the information can be information that directly indicates the part or all of the information, or information that indirectly indicates the part or all of the information, and this application does not limit this.

[0332] Method 2: The first cell generates system information and sends the system information to the terminal, and the terminal receives the system information from the first cell.

[0333] In the second approach, the system information may be generated by the network device to which the first cell belongs (or the network device providing the first cell), or may be generated by the first cell.

[0334] The second method includes, in specific implementation, the first cell sending system information to the terminal in an on-demand or non-on-demand manner, and the terminal correspondingly receiving system information from the first cell in an on-demand or non-on-demand manner.

[0335] If the first cell and the terminal send and receive system information in an on-demand manner, step 501 specifically includes: the terminal sends a request message to the first cell, where the request message is used to request SL configuration information of a neighboring cell; the first cell receives the request message from the terminal and sends system information to the terminal based on the request message, and the terminal receives the system information from the first cell. The system information may be a system information block (e.g., an intra-frequency cell reselection SIB (e.g., SIB3), an inter-frequency cell reselection SIB (e.g., SIB4), or a V2X-SIB) sent in an on-demand manner.

[0336] If the network device and the terminal send and receive system information in a non-on-demand manner, step 501 specifically includes: the first cell directly broadcasts the system information, and the terminal directly receives the system information from the first cell. The system information may be a system information block (e.g., MIB, MIB-SL-V2X, SIB1, etc.) that cannot be sent in an on-demand manner.

[0337] In the second method, optionally, the first cell obtains the SL configuration information of the neighboring cell through the interface between the network device to which the first cell belongs and the network device to which the neighboring cell belongs.

[0338] The network device to which the first cell belongs obtains the SL configuration information of one or more neighboring cells through an interface with the network device to which the neighboring cell belongs (when both network devices are eNBs, the interface may be an X2 interface; when both network devices are gNBs, or one network device is a gNB and the other network device is an ng-eNB, the interface may be an Xn interface). If the SL configuration information of the neighboring cell is updated, the network device to which the neighboring cell belongs also sends the updated SL configuration information to the network device to which the first cell belongs through the interface.

[0339] Optionally, after step 502, the method further includes any one of the following methods.

[0340] Method 1: When the SL configuration information of the neighboring cell does not meet the service requirements, the terminal does not give priority to reselecting to the neighboring cell.

[0341] Method 2: When the SL configuration information of the neighboring cell does not meet the service requirements, the terminal avoids reselecting the neighboring cell. Specifically, the terminal can add the neighboring cell that does not meet the service requirements to the blacklist or not select it as a candidate cell.

[0342] Method 3: The terminal removes the neighboring cells whose SL configuration information does not meet the business requirements from the first candidate cell list (for example, moves them to the temp remove list) to obtain a second candidate cell list; if the number of cells in the second candidate cell list is greater than 0, the terminal reselects the cells in the second candidate cell list; if the number of cells in the second candidate cell list is equal to 0, the terminal adds the removed cells to the second candidate cell list (that is, moves all the neighboring cells in the temp remove list back to the candidate list), and reselects the cells in the second candidate cell list after the cells are added.

[0343] Method 4: The terminal adds the neighboring cells whose SL configuration information in the first candidate cell list meets the service requirements to the second candidate cell list; if the number of cells in the second candidate cell list is greater than 0, the terminal reselects the cells in the second candidate cell list; if the number of cells in the second candidate cell list is equal to 0, the terminal reselects the cells in the first candidate cell list.

[0344] In methods 1 to 3, optionally, when the service requirements include M2 ​​(M2 is an integer greater than 0) requirements, the neighboring cell not meeting the service requirements may mean that the SL configuration information of the neighboring cell does not meet N2 (N2 is an integer greater than 0 and less than or equal to M2) requirements in the M2 requirements. The value of N2 may be preset or predefined or specified by the protocol or determined according to the value of M2. For example, when the SL configuration information of the neighboring cell does not meet all the requirements in the M2 requirements, the neighboring cell does not meet the service requirements. For another example, when the SL configuration information of the neighboring cell does not meet any one of the M2 requirements, the neighboring cell does not meet the service requirements. For example, if the QoS requirement of the terminal's service corresponds to the SLRB configuration using RLC AM, when the terminal determines that the neighboring cell cannot provide the SLRB configuration using RLC AM based on the SL configuration information of a neighboring cell, it is considered that the neighboring cell does not meet the service requirements of the terminal. For another example, if the terminal is configured to use a first RAT for SL communication, but the neighboring cell only provides SL resource configuration using a second RAT, it is considered that the neighboring cell does not meet the service requirements of the terminal. For another example, if the terminal has SL communication capability and is configured to perform SL communication, but the neighboring cell does not provide SL resource configuration, it is considered that the neighboring cell does not meet the service needs of the terminal.

[0345] In method 4, when the service demand includes M1 (M1 is an integer greater than 0) requirements, the neighboring cell meeting the service demand may mean that the SL configuration information of the neighboring cell meets N1 (N1 is an integer greater than 0 and less than or equal to M1) requirements in the M1 requirements. The value of N1 may be preset or predefined or specified by the protocol or determined according to the value of M1. For example, when the SL configuration information of the neighboring cell meets all the requirements in the M1 requirements, the neighboring cell meets the service demand. For another example, when the SL configuration information of the neighboring cell meets any one of the M1 requirements, the neighboring cell meets the service demand. For example, if the QoS requirement of the terminal's service requires that the corresponding SLRB configuration adopts RLC AM, then when the terminal determines that the neighboring cell can provide an SLRB configuration that adopts RLC AM based on the SL configuration information of a certain neighboring cell, it is considered that the neighboring cell can meet the service demand of the terminal. For another example, if the terminal is configured to use both a first RAT and a second RAT for SL communication, and the neighboring cell provides SL resource configuration using both the first RAT and the second RAT, then the neighboring cell is considered to meet the service needs of the terminal. For another example, if the terminal has SL communication capability and is configured for SL communication, and the neighboring cell also provides SL resource configuration, then the neighboring cell is considered to meet the service needs of the terminal.

[0346] It should be noted that when different information in the SL configuration information of the neighboring cell is used as the basis for terminal cell reselection, the terminal can execute different methods from method 1 to method 4 above. For example, when one or more of information 1 to information 6 in the SL configuration information of the neighboring cell is used as the basis for terminal cell reselection, the terminal can execute method 1 or method 2 above. For another example, when one or more of information 7 to information 12 in the SL configuration information of the neighboring cell is used as the basis for terminal cell reselection, the terminal can execute method 3 or method 4 above. For another example, when information 13 in the SL configuration information of the neighboring cell is used as the basis for cell reselection, the terminal can execute method 1 or method 2 above. For another example, when information 14 or information 15 in the SL configuration information of the neighboring cell is used as the basis for cell reselection, the terminal can execute method 3 or method 4 above.

[0347] That is, the information in the SL configuration information can belong to different information groups. For example, information 1 to 6 can belong to one information group, and information 7 to 12 can belong to another information group. Different information groups correspond to different methods. For example, if the information is divided into two groups, with the first information group using method 1 and the second information group using method 3, the candidate cells can be initially screened using method 1 based on the first information group. Then, the cell set obtained from the initial screening can be screened again using method 3 based on the second information group. For the cell set obtained from the second screening, cell reselection is performed according to existing techniques.

[0348] Example 4

[0349] In the fourth embodiment, the neighboring cell or the first cell sends system information to the terminal. The terminal determines whether the neighboring cell meets the service requirements based on part of the information in the system information, and then determines the priority of the frequency points used by each neighboring cell among the determined neighboring cells.

[0350] See also Figure 6 The communication method provided in the fourth embodiment includes:

[0351] 601. The terminal receives system information, which includes SL configuration information of a neighboring cell. SL is a direct communication link between two terminals.

[0352] If there are multiple neighboring cells, the terminal can receive one system information, which may include SL configuration information of multiple neighboring cells, or the terminal can receive multiple system information, where one system information includes SL configuration information of one neighboring cell.

[0353] The SL configuration information of the neighboring cell includes one or more of the following information:

[0354] Information 1: Whether the neighboring cell provides SL resource configuration;

[0355] Information 2: Whether the neighboring cell only provides information about the anchor carrier;

[0356] Information 3: whether the neighboring cell provides SL resource configuration using the first RAT;

[0357] Information 4: whether the neighboring cell provides SL resource configuration using the second RAT;

[0358] Information 5: Whether the neighboring cell provides only the anchor carrier for the SL using the first RAT;

[0359] Information 6: Whether the neighboring cell provides only the anchor carrier for the SL using the second RAT.

[0360] Among them, the relevant description of the information contained in the SL configuration information of the neighboring area can be found in Example 1 and will not be repeated here.

[0361] 602. The terminal determines whether the neighboring cell meets the service requirements based on the SL configuration information of the neighboring cell.

[0362] According to the method provided in Example 4, the terminal performing SL communication can obtain the SL configuration information of the neighboring cell, and can determine whether the neighboring cell meets the service requirements based on the SL configuration information of the neighboring cell. In this case, the terminal can reselect to the neighboring cell that meets the service requirements, thereby preventing subsequent connection establishment or connection recovery, avoiding increasing the power consumption of the terminal, and improving the service transmission performance and continuity (that is, it can solve the above-mentioned problem 3).

[0363] The specific implementation of step 601 can refer to the specific implementation of step 501 and will not be repeated here.

[0364] Optionally, after step 602, the method may further include any one of methods 1 to 4 in embodiment 3, which will not be described in detail.

[0365] Optionally, the system information also includes auxiliary information of neighboring cells. The auxiliary information of neighboring cells includes one or more of the following information:

[0366] Information 7: QoS profile index corresponding to the SLRB configuration provided by the neighboring cell;

[0367] Information 8: Whether the neighboring cell has HARQ-enabled SLRB configuration information;

[0368] Information 9: Whether the neighboring cell uses SLRB configuration using RLC AM;

[0369] Information 10: SL resource pool index provided by the neighboring cell;

[0370] Information 11: The lowest CBR index of the SL resource pool provided by the neighboring cell;

[0371] Information 12: whether the neighboring cell has synchronization reference source configuration information;

[0372] Information 13: SL resource configuration provided by neighboring cells;

[0373] Information 14: SLRB configuration provided by the neighboring cell;

[0374] Information 15: Synchronization reference source configuration provided by the neighboring cell.

[0375] Based on the auxiliary information of the neighboring cells, in a first possible implementation method, the terminal can determine the neighboring cells in the candidate cell list that do not meet the service requirements (recorded as target neighboring cells) based on one or more information in information 1 to information 6, and determine the priority of the frequency points adopted by the neighboring cells other than the target neighboring cells based on the auxiliary information of the neighboring cells. For example, based on the auxiliary information of the neighboring cells, the frequency points adopted by the neighboring cells other than the target neighboring cells that meet the service requirements in the neighboring cells are determined as the frequency points with the highest priority.

[0376] Exemplarily, the terminal can determine the frequency point adopted by the neighboring cell that meets the most business needs among the neighboring cells other than the target neighboring cell according to the auxiliary information of the neighboring cells as the frequency point with the highest priority. For example, if there are 8 neighboring cells, recorded as neighboring cells 1 to 8, and the terminal determines that neighboring cells 5 to 8 do not meet the business needs according to the SL configuration information, then the terminal determines the priority of the frequency points adopted by neighboring cells 1 to 4 according to the auxiliary information of the neighboring cells. If the auxiliary information of neighboring cell 4 meets the most business needs (for example, the business needs of the terminal include 4 needs, the auxiliary information of neighboring cell 4 can meet 4 of the 4 needs, and other neighboring cells can only meet 2 of the 4 needs. At this time, the auxiliary information of neighboring cell 4 meets the most business needs), the frequency point adopted by neighboring cell 4 is determined as the frequency point with the highest priority.

[0377] In a second possible implementation method, the terminal can determine the frequency of the neighboring area (recorded as the target neighboring area) in the candidate cell list that meets the business needs based on one or more information in information 1 to information 6, and determine the priority of the frequency adopted by the neighboring area in the target neighboring area based on the auxiliary information of the neighboring area. For example, the frequency adopted by the neighboring area whose auxiliary information in the target neighboring area meets the most business needs is determined as the frequency with the highest priority.

[0378] For example, if there are 8 neighboring cells, recorded as neighboring cells 1 to neighboring cells 8, the terminal determines that neighboring cells 5 to neighboring cells 8 meet the service needs based on the SL configuration information. At this time, if the auxiliary information of neighboring cell 5 meets the most service needs, the frequency used by neighboring cell 5 is determined as the frequency with the highest priority.

[0379] In the first possible implementation manner and the second possible implementation manner, descriptions on whether the business requirements are met or not can be found in the first embodiment and will not be repeated here.

[0380] In the first possible implementation manner and the second possible implementation manner, after determining the priority of the frequency points adopted by the neighboring cells, cell reselection can be performed based on the priority of the frequency points adopted by the neighboring cells. For details, please refer to the existing technology and will not be repeated here.

[0381] The methods provided in the above-mentioned embodiments 1 to 4 of the present application can be applied to V2X communication scenarios, and can also be applied to other SL communication scenarios. In this case, the V2X-related information in the present application can be replaced with the corresponding information in other SL communication scenarios. For example, MIB-SL-V2X can be replaced with the MIB in other SL communication scenarios.

[0382] In addition, the SL configuration information of the neighboring cells in the embodiments of the present application may also be carried in other information other than the system information, for example, in dedicated signaling. The present application only uses the system information as an example for illustration, but this should not be considered as a limitation of the present application.

[0383] The above mainly introduces the scheme of the embodiment of the present application from the perspective of the interaction between various network elements. It can be understood that, in order to realize the above functions, each network element, such as a network device and a terminal, includes a hardware structure and / or software module corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in a hardware or computer software-driven hardware manner depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0384] The embodiments of the present application can divide the network devices and terminals into functional units according to the above method examples. For example, each functional unit can be divided according to each function, or two or more functions can be integrated into one processing unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. It should be noted that the division of units in the embodiments of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0385] In the case of an integrated unit, Figure 7 A possible structural diagram of the communication device involved in the above embodiment (denoted as communication device 70 ) is shown. The communication device 70 includes a processing unit 701 and a communication unit 702 , and may further include a storage unit 703 . Figure 7The schematic structural diagram shown can be used to illustrate the structure of the network device or terminal involved in the above embodiments. The network device can provide the above first cell and / or neighboring cell.

[0386] When the communication device 70 is used to illustrate the terminal in the above embodiment, the communication device 70 may perform the actions shown in one or more of the following embodiments 1, 2, and 3. When the communication device 70 is used to illustrate the network device in the above embodiment, and the network device provides a neighboring cell, the communication device 70 may perform the actions shown in the following embodiments 4 and / or 6. When the communication device 70 is used to illustrate the network device in the above embodiment, and the network device provides a first cell, the communication device 70 may perform the actions shown in the following embodiments 5 and / or 7.

[0387] In Example 1, the communication unit is used to receive system information from a neighboring cell of the first cell in a non-on-demand manner, where the system information includes sidelink configuration information of the neighboring cell, and the sidelink is a direct communication link between the communication device and other communication devices; the processing unit is used to determine the priority of the frequency point adopted by the neighboring cell based on the sidelink configuration information of the neighboring cell.

[0388] In combination with Example 1, in a possible implementation manner, the communication unit is specifically configured to directly receive the system information from the neighboring cell.

[0389] In combination with Example 1, in a possible implementation, the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on the anchor carrier; whether the neighboring cell provides information on the sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on the sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the second wireless access technology.

[0390] In Example 2, the communication unit is used to receive system information from the first cell, the system information including sidelink configuration information of the neighboring cell of the first cell, the sidelink being a direct communication link between the communication device and other communication devices, and the sidelink configuration information of the neighboring cell including one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on anchor carrier; whether the neighboring cell provides information on sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on anchor carrier for the sidelink using the second wireless access technology; the processing unit is used to determine the priority of the frequency point adopted by the neighboring cell based on the sidelink configuration information of the neighboring cell.

[0391] In combination with embodiment 2, in a possible implementation manner, the communication unit is specifically configured to receive system information from the first cell in an on-demand manner or a non-on-demand manner.

[0392] In combination with Example 2, in a possible implementation, the communication unit is specifically used to send a request message to the first cell, where the request message is used to request the sidelink configuration information of the neighboring cell; and receive the system information from the first cell.

[0393] In combination with Example 2, in a possible implementation manner, the communication unit is specifically configured to directly receive the system information from the first cell.

[0394] In combination with Example 2, in a possible implementation, the first cell obtains the sidelink configuration information of the neighboring cell through an interface between a network device to which the first cell belongs and a network device to which the neighboring cell belongs.

[0395] In combination with Example 1 or Example 2, in a possible implementation manner, the sidelink resource configuration includes intra-carrier sidelink resource configuration and / or inter-carrier sidelink resource configuration.

[0396] In combination with Example 1 or Example 2, in a possible implementation method, the sidelink resource configuration within the carrier of the neighboring cell refers to the sidelink resource configuration of the same frequency as the frequency adopted by the neighboring cell, or the sidelink resource configuration on the same carrier as the carrier adopted by the neighboring cell; the sidelink resource configuration between carriers of the neighboring cell refers to the sidelink resource configuration of a frequency different from the frequency adopted by the neighboring cell, or the sidelink resource configuration on a frequency adjacent to the frequency adopted by the neighboring cell, or the sidelink resource configuration on a carrier different from the carrier adopted by the neighboring cell.

[0397] In combination with Example 1 or Example 2, in a possible implementation method, the processing unit is specifically used to: when it is determined that the neighboring cell provides side link resource configuration based on the side link configuration information of the neighboring cell, determine the frequency used by the neighboring cell as the frequency with the highest priority.

[0398] In combination with Example 1 or Example 2, in one possible implementation, the communication device satisfies one or more of the following conditions: the communication device has sidelink communication capability, the communication device is configured to perform sidelink communication, and the communication device is authorized to perform sidelink communication.

[0399] In combination with Example 1 or Example 2, in a possible implementation manner, the processing unit is specifically used to: when the communication device is configured to adopt both the first radio access technology and the second radio access technology for sidelink communication, determine the frequency adopted by the neighboring area that provides both the sidelink resource configuration adopting the first radio access technology and the sidelink resource configuration adopting the second radio access technology as the frequency with the highest priority; or, when the communication device is configured to adopt only the first radio access technology for sidelink communication, determine the frequency adopted by the neighboring area that provides the sidelink resource configuration adopting the first radio access technology as the frequency with the highest priority; or, when the communication device is configured to adopt only the second radio access technology for sidelink communication, determine the frequency adopted by the neighboring area that adopts the sidelink resource configuration adopting the second radio access technology as the frequency with the highest priority.

[0400] In combination with Example 1 or Example 2, in a possible implementation, when the communication device is configured to use both the first radio access technology and the second radio access technology for sidelink communication, the communication device satisfies one or more of the following conditions: the communication device has the ability to use both the first radio access technology and the second radio access technology for sidelink communication; the communication device is authorized to perform sidelink communication using the first radio access technology and the second radio access technology; or, when the communication device is configured to use only the first radio access technology for sidelink communication, the communication device satisfies one or more of the following conditions: the communication device has the ability to use the first radio access technology for sidelink communication, and the communication device is authorized to perform sidelink communication using the first radio access technology; or, when the communication device is configured to use only the second radio access technology for sidelink communication, the communication device satisfies one or more of the following conditions: the communication device has the ability to use the second radio access technology for sidelink communication, and the communication device is authorized to perform sidelink communication using the second radio access technology.

[0401] In combination with Example 1 or Example 2, in a possible implementation manner, one bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and / or one bit is used to indicate whether the neighboring cell only provides an anchor carrier.

[0402] In combination with Example 1 or Example 2, in a possible implementation manner, 2 bits are used to indicate whether the neighboring cell provides sidelink resource configuration using the first radio access technology and / or the second radio access technology.

[0403] In combination with Example 1 or Example 2, in a possible implementation, the sidelink resource configuration includes sidelink transmission resource configuration and / or sidelink reception resource configuration.

[0404] In combination with Example 1 or Example 2, in a possible implementation, the neighboring cell not providing sidelink resource configuration means that the neighboring cell does not provide sidelink resource configuration through system information or dedicated signaling.

[0405] In combination with Example 1 or Example 2, in a possible implementation manner, the neighboring cell not providing sidelink resource configuration means that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

[0406] In combination with Example 1 or Example 2, in a possible implementation, the sidelink configuration information of the neighboring cell includes one or more of the following information: the QoS profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; information on whether the neighboring cell has a sidelink radio bearer configuration with HARQ enabled; information on whether the neighboring cell has a sidelink radio bearer configuration using RLC AM; the sidelink resource pool index provided by the neighboring cell; the minimum CBR index of the sidelink resource pool provided by the neighboring cell; information on whether the neighboring cell has a synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; and the synchronization reference source configuration provided by the neighboring cell.

[0407] In combination with Example 1 or Example 2, in a possible implementation, the processing unit is specifically used to: when the communication device is configured to transmit services on the side link, determine the frequency adopted by the neighboring cell that meets the service requirements in the neighboring cell as the frequency with the highest priority based on the side link configuration information of the neighboring cell.

[0408] In embodiment 3, the communication unit is used to receive system information, the system information includes sidelink configuration information of a neighboring cell of the first cell, and the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on anchor carrier; whether the neighboring cell provides information on sidelink resource configuration using a first wireless access technology; whether the neighboring cell provides information on sidelink resource configuration using a second wireless access technology; whether the neighboring cell only provides information on anchor carrier for a sidelink using the first wireless access technology; whether the neighboring cell only provides information on anchor carrier for a sidelink using the second wireless access technology; QoS profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; whether the neighboring cell has information on sidelink radio bearer configuration with HARQ enabled; whether the neighboring cell has information on RLC Information on the sidelink radio bearer configuration of AM; the sidelink resource pool index provided by the neighboring cell; the minimum CBR index of the sidelink resource pool provided by the neighboring cell; information on whether the neighboring cell has a synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; the synchronization reference source configuration provided by the neighboring cell; the processing unit is used to determine whether the neighboring cell meets the service requirements based on the sidelink configuration information of the neighboring cell of the first cell.

[0409] In combination with Example 3, in a possible implementation manner, the communication unit is specifically configured to receive system information from the neighboring cell in a non-on-demand manner.

[0410] In combination with Example 3, in a possible implementation manner, the communication unit is specifically configured to directly receive the system information from the neighboring cell.

[0411] In combination with Example 3, in a possible implementation manner, the communication unit is specifically configured to receive system information from the first cell.

[0412] In combination with Example 3, in a possible implementation manner, the communication unit is specifically configured to receive the system information from the first cell in an on-demand manner or a non-on-demand manner.

[0413] In combination with Example 3, in a possible implementation, the communication unit is specifically used to send a request message to the first cell, where the request message is used to request the side link configuration information of the neighboring cell, and receive the system information from the first cell.

[0414] In combination with Example 3, in a possible implementation manner, the communication unit is specifically configured to directly receive the system information from the first cell.

[0415] In combination with Example 3, in a possible implementation, the first cell obtains the sidelink configuration information of the neighboring cell through an interface between a network device to which the first cell belongs and a network device to which the neighboring cell belongs.

[0416] In combination with Example 3, in a possible implementation manner, the sidelink resource configuration includes intra-carrier sidelink resource configuration and / or inter-carrier sidelink resource configuration.

[0417] In combination with Example 3, in a possible implementation method, the sidelink resource configuration within the carrier of the neighboring cell refers to the sidelink resource configuration of the same frequency as the frequency adopted by the neighboring cell, or the sidelink resource configuration on the same carrier as the carrier adopted by the neighboring cell; the sidelink resource configuration between carriers of the neighboring cell refers to the sidelink resource configuration of a frequency different from the frequency adopted by the neighboring cell, or the sidelink resource configuration on a frequency adjacent to the frequency adopted by the neighboring cell, or the sidelink resource configuration on a carrier different from the carrier adopted by the neighboring cell.

[0418] In combination with Example 3, in a possible implementation manner, one bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and / or one bit is used to indicate whether the neighboring cell only provides an anchor carrier.

[0419] In combination with Example 3, in a possible implementation manner, 2 bits are used to indicate whether the neighboring cell provides sidelink resource configuration using the first radio access technology and / or the second radio access technology.

[0420] In combination with Example 3, in a possible implementation manner, the sidelink resource configuration includes sidelink transmission resource configuration and / or sidelink reception resource configuration.

[0421] In combination with Example 3, in a possible implementation manner, the neighboring cell not providing sidelink resource configuration means that the neighboring cell does not provide sidelink resource configuration through system information or dedicated signaling.

[0422] In combination with Example 3, in a possible implementation manner, the neighboring cell not providing sidelink resource configuration means that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

[0423] In combination with Example 3, in a possible implementation, the processing unit is specifically configured to: not give priority to reselecting to the neighboring cell when the sidelink configuration information of the neighboring cell does not meet the service requirements.

[0424] In combination with Example 3, in a possible implementation, the processing unit is specifically used to: avoid reselecting to the neighboring cell when the sidelink configuration information of the neighboring cell does not meet the service requirements.

[0425] In combination with Example 3, in a possible implementation method, the processing unit is specifically used to: remove the neighboring cells whose side link configuration information does not meet the service requirements from the first candidate cell list to obtain a second candidate cell list; if the number of cells in the second candidate cell list is greater than 0, reselect the cells in the second candidate cell list; if the number of cells in the second candidate cell list is equal to 0, add the removed cells to the second candidate cell list again, and reselect the cells in the second candidate cell list after the cells are added.

[0426] In combination with Example 3, in a possible implementation method, the processing unit is specifically used to: add the neighboring cells whose sidelink configuration information in the first candidate cell list meets the service requirements to the second candidate cell list; if the number of cells in the second candidate cell list is greater than 0, reselect the cells in the second candidate cell list; if the number of cells in the second candidate cell list is equal to 0, reselect the cells in the first candidate cell list.

[0427] In Example 4, a communication unit and a processing unit; the processing unit is used to generate (for example, generate on the neighboring cell) system information, the system information including sidelink configuration information of the neighboring cell, the sidelink being a direct communication link between two terminals; the communication unit is used to send system information to the terminal located in the first cell in a non-on-demand manner on the neighboring cell, the sidelink configuration information of the neighboring cell in the system information is used by the terminal to determine the priority of the frequency adopted by the neighboring cell.

[0428] In combination with Example 4, in a possible implementation manner, the communication unit is specifically configured to directly send the system information to the terminal in the neighboring cell.

[0429] In combination with Example 4, in a possible implementation, the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on the anchor carrier; whether the neighboring cell provides information on the sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on the sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the second wireless access technology.

[0430] In embodiment 5, there are a communication unit and a processing unit; the processing unit is used to generate (for example, generate on the first cell) system information, the system information including sidelink configuration information of the neighboring cell of the first cell, the sidelink being a direct communication link between two terminals, the sidelink configuration information of the neighboring cell including one or more of the following information: whether the neighboring cell provides sidelink resource configuration information; whether the neighboring cell only provides information on the anchor carrier; whether the neighboring cell provides sidelink resource configuration information using the first wireless access technology; whether the neighboring cell provides information on the sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the second wireless access technology; the communication unit is used to send the system information on the first cell to the terminal located in the first cell, the sidelink configuration information of the neighboring cell in the system information is used by the terminal to determine the priority of the frequency point adopted by the neighboring cell.

[0431] In combination with Embodiment 5, in a possible implementation manner, the communication unit is specifically configured to send the system information to the terminal in the first cell in an on-demand manner or a non-on-demand manner.

[0432] In combination with Example 5, in a possible implementation method, the communication unit is specifically used to receive a request message from the terminal on the first cell, where the request message is used to request the side link configuration information of the neighboring cell, and send the system information to the terminal on the first cell according to the request message.

[0433] In combination with Embodiment 5, in a possible implementation manner, the communication unit is specifically configured to directly send the system information to the terminal on the first cell.

[0434] In combination with Example 5, in a possible implementation, the first cell obtains the sidelink configuration information of the neighboring cell through an interface between a network device to which the first cell belongs and a network device to which the neighboring cell belongs.

[0435] In combination with Example 4 or Example 5, in a possible implementation manner, the sidelink resource configuration includes intra-carrier sidelink resource configuration and / or inter-carrier sidelink resource configuration.

[0436] In combination with Example 4 or Example 5, in a possible implementation method, the sidelink resource configuration within the carrier of the neighboring cell refers to the sidelink resource configuration of the same frequency as the frequency adopted by the neighboring cell, or the sidelink resource configuration on the same carrier as the carrier adopted by the neighboring cell; the sidelink resource configuration between carriers of the neighboring cell refers to the sidelink resource configuration of a frequency different from the frequency adopted by the neighboring cell, or the sidelink resource configuration on a frequency adjacent to the frequency adopted by the neighboring cell, or the sidelink resource configuration on a carrier different from the carrier adopted by the neighboring cell.

[0437] In combination with Example 4 or Example 5, in a possible implementation manner, one bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and / or one bit is used to indicate whether the neighboring cell only provides an anchor carrier.

[0438] In combination with Example 4 or Example 5, in a possible implementation manner, 2 bits are used to indicate whether the neighboring cell provides sidelink resource configuration using the first radio access technology and / or the second radio access technology.

[0439] In combination with Example 4 or Example 5, in a possible implementation, the sidelink resource configuration includes sidelink transmission resource configuration and / or sidelink reception resource configuration.

[0440] In combination with Example 4 or Example 5, in a possible implementation manner, the neighboring cell not providing sidelink resource configuration means that the neighboring cell does not provide sidelink resource configuration through system information or dedicated signaling.

[0441] In combination with Example 4 or Example 5, in a possible implementation manner, the neighboring cell not providing sidelink resource configuration means that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

[0442] In combination with Example 4 or Example 5, in a possible implementation, the sidelink configuration information of the neighboring cell includes one or more of the following information: the QoS profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; information on whether the neighboring cell has a sidelink radio bearer configuration with HARQ enabled; information on whether the neighboring cell has a sidelink radio bearer configuration using RLC AM; the sidelink resource pool index provided by the neighboring cell; the minimum CBR index of the sidelink resource pool provided by the neighboring cell; information on whether the neighboring cell has a synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; and the synchronization reference source configuration provided by the neighboring cell.

[0443] In embodiment 6, a processing unit and a communication unit; the processing unit is used to generate (for example, generate on the neighboring cell) system information, the system information including the sidelink configuration information of the neighboring cell of the first cell, the sidelink configuration information of the neighboring cell including one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on anchor carrier; whether the neighboring cell provides information on sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on anchor carrier for the sidelink using the second wireless access technology; QoS profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; whether the neighboring cell has information on sidelink radio bearer configuration with HARQ enabled; whether the neighboring cell has information on RLC Information on the sidelink radio bearer configuration of AM; the sidelink resource pool index provided by the neighboring cell; the minimum CBR index of the sidelink resource pool provided by the neighboring cell; information on whether the neighboring cell has a synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; the synchronization reference source configuration provided by the neighboring cell; wherein the sidelink is a direct communication link between two terminals; the communication unit is used to send system information to the terminal located in the first cell in a non-on-demand manner on the neighboring cell, and the sidelink configuration information of the neighboring cell in the system information is used by the terminal to determine whether the neighboring cell meets the service requirements.

[0444] In combination with Example 6, in a possible implementation manner, the communication unit is specifically configured to directly send the system information to the terminal.

[0445] In embodiment 7, a processing unit and a communication unit; the processing unit is used to generate (for example, generate on the first cell) system information, the system information including the sidelink configuration information of the neighboring cell of the first cell, the sidelink configuration information of the neighboring cell including one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on anchor carrier; whether the neighboring cell provides information on sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on anchor carrier for the sidelink using the second wireless access technology; QoS profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; whether the neighboring cell has information on sidelink radio bearer configuration with HARQ enabled; whether the neighboring cell has information on RLC Information on the sidelink radio bearer configuration of AM; the sidelink resource pool index provided by the neighboring cell; the minimum CBR index of the sidelink resource pool provided by the neighboring cell; information on whether the neighboring cell has a synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; the synchronization reference source configuration provided by the neighboring cell; wherein the sidelink is a direct communication link between two terminals; the communication unit is used to send the system information to the terminal located in the first cell on the first cell, and the sidelink configuration information of the neighboring cell in the system information is used by the terminal to determine whether the neighboring cell meets the service requirements.

[0446] In combination with Example 7, in a possible implementation manner, the communication unit is specifically configured to send the system information to the terminal in the first cell in an on-demand manner or a non-on-demand manner.

[0447] In combination with Example 7, in a possible implementation method, the communication unit is specifically used to receive a request message from the terminal on the first cell, where the request message is used to request the side link configuration information of the neighboring cell, and send the system information to the terminal on the first cell according to the request message.

[0448] In combination with Example 7, in a possible implementation manner, the communication unit is specifically configured to directly send the system information to the terminal on the first cell.

[0449] In combination with Example 7, in a possible implementation, the first cell obtains the sidelink configuration information of the neighboring cell through an interface between a network device to which the first cell belongs and a network device to which the neighboring cell belongs.

[0450] In combination with Example 6 or Example 7, in a possible implementation manner, the sidelink resource configuration includes intra-carrier sidelink resource configuration and / or inter-carrier sidelink resource configuration.

[0451] In combination with Example 6 or Example 7, in one possible implementation, the sidelink resource configuration within the carrier of the neighboring cell refers to the sidelink resource configuration of the same frequency as the frequency adopted by the neighboring cell, or the sidelink resource configuration on the same carrier as the carrier adopted by the neighboring cell; the sidelink resource configuration between carriers of the neighboring cell refers to the sidelink resource configuration of a frequency different from the frequency adopted by the neighboring cell, or the sidelink resource configuration on a frequency adjacent to the frequency adopted by the neighboring cell, or the sidelink resource configuration on a carrier different from the carrier adopted by the neighboring cell.

[0452] In combination with Example 6 or Example 7, in a possible implementation, one bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and / or one bit is used to indicate whether the neighboring cell only provides an anchor carrier.

[0453] In combination with Example 6 or Example 7, in a possible implementation manner, 2 bits are used to indicate whether the neighboring cell provides sidelink resource configuration using the first radio access technology and / or the second radio access technology.

[0454] In combination with Example 6 or Example 7, in a possible implementation, the sidelink resource configuration includes sidelink transmission resource configuration and / or sidelink reception resource configuration.

[0455] In combination with Example 6 or Example 7, in a possible implementation manner, the neighboring cell not providing sidelink resource configuration means that the neighboring cell does not provide sidelink resource configuration through system information or dedicated signaling.

[0456] In combination with Example 6 or Example 7, in a possible implementation, the neighboring cell not providing sidelink resource configuration means that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

[0457] The communication device 70 may be a device or a chip within the device.

[0458] In particular, when the communication device 70 is a device, the processing unit 701 can be a processor or a controller, and the communication unit 702 can be a communication interface, a transceiver, a transceiver, a transceiver circuit, a transceiver device, etc. In particular, the communication interface is a general term and can include one or more interfaces. The storage unit 703 can be a memory. When the communication device 70 is a chip within a device, the processing unit 701 can be a processor or a controller, and the communication unit 702 can be an input interface and / or output interface, a pin or a circuit, etc. The storage unit 703 can be a storage unit within the chip (for example, a register, a cache, etc.), or it can be a storage unit within the device that is located outside the chip (for example, a read-only memory, a random access memory, etc.).

[0459] Among them, the communication unit can also be called a transceiver unit. The antenna and control circuit with transceiver functions in the communication device 70 can be regarded as the communication unit 702 of the communication device 70, and the processor with processing function can be regarded as the processing unit 701 of the communication device 70. Optionally, the device used to implement the receiving function in the communication unit 702 can be regarded as a receiving unit, and the receiving unit is used to perform the receiving steps in the embodiment of the present application. The receiving unit can be a receiver, a receiver, a receiving circuit, etc. The device used to implement the sending function in the communication unit 702 can be regarded as a sending unit, and the sending unit is used to perform the sending steps in the embodiment of the present application. The sending unit can be a transmitter, a transmitter, a sending circuit, etc.

[0460] Figure 7 If the integrated units in the embodiment of the present application are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method described in each embodiment of the present application. The storage medium for storing computer software products includes: various media that can store program codes, such as USB flash drives, mobile hard drives, read-only memories (ROM), random access memories (RAM), magnetic disks or optical disks.

[0461] Figure 7 A unit in a can also be called a module, for example, a processing unit can be called a processing module.

[0462] The present application embodiment also provides a hardware structure diagram of a communication device (denoted as communication device 80), see Figure 8 or Figure 9 The communication device 80 includes a processor 801 and, optionally, a memory 802 connected to the processor 801.

[0463] The processor 801 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application. The processor 801 may also include multiple CPUs, and the processor 801 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The processor here may refer to one or more devices, circuits, or processing cores for processing data (such as computer program instructions).

[0464] The memory 802 may be a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer, and the embodiments of the present application do not impose any restrictions on this. The memory 802 may exist independently or be integrated with the processor 801. Among them, the memory 802 may contain computer program code. The processor 801 is used to execute the computer program code stored in the memory 802, thereby implementing the method provided in the embodiments of the present application.

[0465] In the first possible implementation, see Figure 8 The communication device 80 further includes a transceiver 803. The processor 801, the memory 802, and the transceiver 803 are connected via a bus. The transceiver 803 is used to communicate with other devices or a communication network. Optionally, the transceiver 803 may include a transmitter and a receiver. The device used to implement the receiving function in the transceiver 803 can be considered a receiver, and the receiver is used to perform the receiving step in the embodiment of the present application. The device used to implement the transmitting function in the transceiver 803 can be considered a transmitter, and the transmitter is used to perform the transmitting step in the embodiment of the present application.

[0466] Based on the first possible implementation, Figure 8 The schematic structural diagram shown can be used to illustrate the structure of the network device or terminal involved in the above embodiments. The network device can provide the above first cell and / or neighboring cell.

[0467] when Figure 8 The schematic diagram of the structure shown is used to illustrate the structure of the network device involved in the above embodiment. The processor 801 is used to control and manage the actions of the network device. For example, the processor 801 is used to support the network device to perform operations through the neighboring area. Figure 3 301 and 302 and / or executed by the first cell Figure 4 401 and 402 in the embodiment of the present application, and / or the actions performed by the network device in other processes described in the embodiment of the present application. The processor 801 can communicate with other network entities through the transceiver 803, for example, Figure 3 The memory 802 is used to store program codes and data of the network device.

[0468] when Figure 8 The schematic diagram of the structure shown is used to illustrate the structure of the terminal involved in the above embodiment. The processor 801 is used to control and manage the actions of the terminal. For example, the processor 801 is used to support the terminal to execute Figure 3 302 to 304, Figure 4 402 to 404, Figure 5 501 and 502, Figure 6 601 and 602 in the embodiment of the present application, and / or the actions performed by the terminal in other processes described in the embodiment of the present application. The processor 801 can communicate with other network entities through the transceiver 803, for example, Figure 3 The network device shown in FIG. 8 provides communication between neighboring cells. The memory 802 is used to store program codes and data of the terminal.

[0469] In a second possible implementation, the processor 801 includes a logic circuit and an input interface and / or an output interface, wherein the output interface is used to perform the sending action in the corresponding method, and the input interface is used to perform the receiving action in the corresponding method.

[0470] Based on the second possible implementation, see Figure 9 , Figure 9 The schematic structural diagram shown can be used to illustrate the structure of the network device or terminal involved in the above embodiments. The network device can provide the above first cell and / or neighboring cell.

[0471] when Figure 9The schematic diagram of the structure shown is used to illustrate the structure of the network device involved in the above embodiment. The processor 801 is used to control and manage the actions of the network device. For example, the processor 801 is used to support the network device to perform operations through the neighboring area. Figure 3 301 and 302 and / or executed by the first cell Figure 4 401 and 402 in the embodiment of the present application, and / or the actions performed by the network device in other processes described in the embodiment of the present application. The processor 801 can communicate with other network entities through the input interface and / or the output interface, for example, Figure 3 The memory 802 is used to store program codes and data of the network device.

[0472] when Figure 9 The schematic diagram of the structure shown is used to illustrate the structure of the terminal involved in the above embodiment. The processor 801 is used to control and manage the actions of the terminal. For example, the processor 801 is used to support the terminal to execute Figure 3 302 to 304, Figure 4 402 to 404, Figure 5 501 and 502, Figure 6 601 and 602, and / or actions performed by the terminal in other processes described in the embodiments of the present application. The processor 801 can communicate with other network entities through the input interface and / or the output interface, for example, Figure 3 The network device shown in FIG. 8 provides communication between neighboring cells. The memory 802 is used to store program codes and data of the terminal.

[0473] An embodiment of the present application also provides a computer-readable storage medium, comprising instructions, which, when executed on a computer, enables the computer to execute any of the above methods.

[0474] An embodiment of the present application also provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute any of the above methods.

[0475] The embodiment of the present application further provides a communication system, comprising: the aforementioned network device and a terminal. Optionally, the aforementioned terminal is also included.

[0476] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that contains one or more media that can be integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0477] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the claimed application, those skilled in the art may understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0478] Although the present application has been described with reference to specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely illustrative of the present application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, the present application is intended to include such modifications and variations as fall within the scope of the claims of the present application and their equivalents.

Claims

1. A communication method, characterized in that: include: The terminal directly receives sidelink configuration information of the neighboring cell from the neighboring cell of the first cell, where the sidelink is a direct communication link between the terminal and other terminals; The terminal determines the priority of the frequency point adopted by the neighboring cell according to the sidelink configuration information of the neighboring cell.

2. The method according to claim 1, characterized in that The sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on the anchor carrier; whether the neighboring cell provides information on the sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on the sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the second wireless access technology.

3. A communication method, characterized in that: include: The terminal directly receives sidelink configuration information of a neighboring cell of the first cell from the first cell, where the sidelink is a direct communication link between the terminal and other terminals, and the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on an anchor carrier; whether the neighboring cell provides information on a sidelink resource configuration using a first radio access technology; whether the neighboring cell provides information on a sidelink resource configuration using a second radio access technology; whether the neighboring cell provides information on only an anchor carrier for a sidelink using the first radio access technology; and whether the neighboring cell provides information on only an anchor carrier for a sidelink using the second radio access technology. The terminal determines the priority of the frequency point adopted by the neighboring cell according to the sidelink configuration information of the neighboring cell.

4. The method according to claim 3, characterized in that The first cell obtains the sidelink configuration information of the neighboring cell through an interface between a network device to which the first cell belongs and a network device to which the neighboring cell belongs.

5. The method according to any one of claims 2 to 4, characterized in that: The sidelink resource configuration includes intra-carrier sidelink resource configuration and / or inter-carrier sidelink resource configuration.

6. The method according to claim 5, characterized in that The intra-carrier sidelink resource configuration of the neighboring cell refers to the sidelink resource configuration of the same frequency as the frequency adopted by the neighboring cell, or the sidelink resource configuration on the same carrier as the carrier adopted by the neighboring cell; the inter-carrier sidelink resource configuration of the neighboring cell refers to the sidelink resource configuration of a frequency different from the frequency adopted by the neighboring cell, or the sidelink resource configuration on the adjacent frequency of the frequency adopted by the neighboring cell, or the sidelink resource configuration on a carrier different from the carrier adopted by the neighboring cell.

7. The method according to any one of claims 2 to 4 and 6, characterized in that: The terminal determines, according to the sidelink configuration information of the neighboring cell, the priority of the frequency point used by the neighboring cell, including: In a case where the terminal determines that the neighboring cell provides sidelink resource configuration according to the sidelink configuration information of the neighboring cell, the terminal determines the frequency point used by the neighboring cell as the frequency point with the highest priority.

8. The method according to claim 7, characterized in that The terminal satisfies one or more of the following conditions: the terminal has a sidelink communication capability, the terminal is configured to perform sidelink communication, and the terminal is authorized to perform sidelink communication.

9. The method according to any one of claims 2-4 and 6, characterized in that: The terminal determines, according to the sidelink configuration information of the neighboring cell, the priority of the frequency point used by the neighboring cell, including: When the terminal is configured to use both the first radio access technology and the second radio access technology for sidelink communication, the terminal determines, as the frequency with the highest priority, a frequency used by the neighboring cell that provides both a sidelink resource configuration using the first radio access technology and a sidelink resource configuration using the second radio access technology; or In a case where the terminal is configured to use only the first radio access technology for sidelink communication, the terminal determines, as the frequency with the highest priority, a frequency used by the neighboring cell that provides sidelink resource configuration using the first radio access technology; or In a case where the terminal is configured to use only the second radio access technology for sidelink communication, the terminal determines the frequency used by the neighboring cell configured with sidelink resources using the second radio access technology as the frequency with the highest priority.

10. The method according to claim 9, characterized in that When the terminal is configured to use both the first radio access technology and the second radio access technology for sidelink communication, the terminal satisfies one or more of the following conditions: the terminal has the capability of using both the first radio access technology and the second radio access technology for sidelink communication; the terminal is authorized to use both the first radio access technology and the second radio access technology for sidelink communication; or When the terminal is configured to use only the first radio access technology for sidelink communication, the terminal satisfies one or more of the following conditions: the terminal has the capability of using the first radio access technology for sidelink communication, and the terminal is authorized to use the first radio access technology for sidelink communication; or When the terminal is configured to use only the second radio access technology for sidelink communication, the terminal satisfies one or more of the following conditions: the terminal has the ability to use the second radio access technology for sidelink communication, and the terminal is authorized to use the second radio access technology for sidelink communication.

11. The method according to any one of claims 2-4, 6, 8, and 10, characterized in that: One bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and / or one bit is used to indicate whether the neighboring cell only provides an anchor carrier.

12. The method according to any one of claims 2-4, 6, 8, and 10, characterized in that: Two bits are used to indicate whether the neighboring cell provides sidelink resource configuration using the first radio access technology and / or the second radio access technology.

13. The method according to any one of claims 2-4, 6, 8, and 10, characterized in that: The sidelink resource configuration includes sidelink transmission resource configuration and / or sidelink reception resource configuration.

14. The method according to any one of claims 2-4, 6, 8, and 10, characterized in that: The neighboring cell not providing sidelink resource configuration indicates that the neighboring cell does not provide sidelink resource configuration through system information or dedicated signaling.

15. The method according to any one of claims 2-4, 6, 8, and 10, characterized in that: The neighboring cell not providing sidelink resource configuration indicates that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

16. The method according to any one of claims 1-4, 6, 8, and 10, characterized in that: The sidelink configuration information of the neighboring cell includes one or more of the following information: the quality of service (QoS) profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; information on whether the neighboring cell has a sidelink radio bearer configuration with hybrid automatic repeat request (HARQ) enabled; information on whether the neighboring cell has a sidelink radio bearer configuration using radio link control acknowledgment mode (RLC AM); the sidelink resource pool index provided by the neighboring cell; the minimum channel congestion rate (CBR) index of the sidelink resource pool provided by the neighboring cell; information on whether the neighboring cell has a synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; and the synchronization reference source configuration provided by the neighboring cell.

17. The method according to claim 16, characterized in that The terminal determines, according to the sidelink configuration information of the neighboring cell, the priority of the frequency point used by the neighboring cell, including: When the terminal is configured to transmit services on the sidelink, the terminal determines the frequency point adopted by the neighboring cell that meets the service requirements among the neighboring cells as the frequency point with the highest priority according to the sidelink configuration information of the neighboring cell.

18. A communication method, characterized in that: Applied to a network device, the network device providing a neighboring cell of a first cell, the method comprising: generating sidelink configuration information of the neighboring cell, where the sidelink is a direct communication link between two terminals; The neighboring cell directly sends the sidelink configuration information of the neighboring cell to the terminal located in the first cell, and the sidelink configuration information of the neighboring cell is used by the terminal to determine the priority of the frequency point adopted by the neighboring cell.

19. The method according to claim 18, characterized in that The sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on the anchor carrier; whether the neighboring cell provides information on the sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on the sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the second wireless access technology.

20. A communication method, characterized in that: Applied to a network device, the network device providing a first cell, the method comprising: Generate sidelink configuration information of a neighboring cell of the first cell, where the sidelink is a direct communication link between two terminals, and the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell provides information on only an anchor carrier; whether the neighboring cell provides information on a sidelink resource configuration using a first radio access technology; whether the neighboring cell provides information on a sidelink resource configuration using a second radio access technology; whether the neighboring cell provides information on only an anchor carrier for a sidelink using the first radio access technology; and whether the neighboring cell provides information on only an anchor carrier for a sidelink using the second radio access technology. The first cell directly sends the sidelink configuration information of the neighboring cell to the terminal located in the first cell, and the sidelink configuration information of the neighboring cell is used by the terminal to determine the priority of the frequency point adopted by the neighboring cell.

21. The method according to claim 20, characterized in that The first cell obtains the sidelink configuration information of the neighboring cell through an interface between a network device to which the first cell belongs and a network device to which the neighboring cell belongs.

22. The method according to any one of claims 19 to 21, characterized in that The sidelink resource configuration includes intra-carrier sidelink resource configuration and / or inter-carrier sidelink resource configuration.

23. The method according to claim 22, characterized in that The intra-carrier sidelink resource configuration of the neighboring cell refers to the sidelink resource configuration of the same frequency as the frequency adopted by the neighboring cell, or the sidelink resource configuration on the same carrier as the carrier adopted by the neighboring cell; the inter-carrier sidelink resource configuration of the neighboring cell refers to the sidelink resource configuration of a frequency different from the frequency adopted by the neighboring cell, or the sidelink resource configuration on the adjacent frequency of the frequency adopted by the neighboring cell, or the sidelink resource configuration on a carrier different from the carrier adopted by the neighboring cell.

24. The method according to any one of claims 19 to 21 or 23, wherein: One bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and / or one bit is used to indicate whether the neighboring cell only provides an anchor carrier.

25. The method according to any one of claims 19 to 21 or 23, wherein: Two bits are used to indicate whether the neighboring cell provides sidelink resource configuration using the first radio access technology and / or the second radio access technology.

26. The method according to any one of claims 19-21 and 23, characterized in that The sidelink resource configuration includes sidelink transmission resource configuration and / or sidelink reception resource configuration.

27. The method according to any one of claims 19 to 21 and 23, characterized in that: The neighboring cell not providing sidelink resource configuration indicates that the neighboring cell does not provide sidelink resource configuration through system information or dedicated signaling.

28. The method according to any one of claims 19 to 21 or 23, wherein: The neighboring cell not providing sidelink resource configuration indicates that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

29. The method according to any one of claims 18 to 21 and 23, characterized in that: The sidelink configuration information of the neighboring cell includes one or more of the following information: the quality of service (QoS) profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; information on whether the neighboring cell has a sidelink radio bearer configuration with hybrid automatic repeat request (HARQ) enabled; information on whether the neighboring cell has a sidelink radio bearer configuration using radio link control acknowledgment mode (RLC AM); the sidelink resource pool index provided by the neighboring cell; the minimum channel congestion rate (CBR) index of the sidelink resource pool provided by the neighboring cell; information on whether the neighboring cell has a synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; and the synchronization reference source configuration provided by the neighboring cell.

30. A communication device, characterized in that: include: Communication unit and processing unit, The communication unit is configured to directly receive sidelink configuration information of a neighboring cell of the first cell from the neighboring cell of the first cell, where the sidelink is a direct communication link between the communication device and another communication device; The processing unit is used to determine the priority of the frequency point adopted by the neighboring cell according to the sidelink configuration information of the neighboring cell.

31. The device according to claim 30, characterized in that The sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on the anchor carrier; whether the neighboring cell provides information on the sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on the sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the second wireless access technology.

32. A communication device, characterized in that: include: Communication unit and processing unit, The communication unit is configured to directly receive sidelink configuration information of a neighboring cell of the first cell from the first cell, where the sidelink is a direct communication link between the communication device and another communication device, and the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on an anchor carrier; whether the neighboring cell provides information on a sidelink resource configuration using a first radio access technology; whether the neighboring cell provides information on a sidelink resource configuration using a second radio access technology; whether the neighboring cell only provides information on an anchor carrier for a sidelink using the first radio access technology; and whether the neighboring cell only provides information on an anchor carrier for a sidelink using the second radio access technology. The processing unit is used to determine the priority of the frequency point adopted by the neighboring cell according to the sidelink configuration information of the neighboring cell.

33. The device according to claim 32, characterized in that The first cell obtains the sidelink configuration information of the neighboring cell through an interface between a network device to which the first cell belongs and a network device to which the neighboring cell belongs.

34. The device according to any one of claims 31 to 33, characterized in that The sidelink resource configuration includes intra-carrier sidelink resource configuration and / or inter-carrier sidelink resource configuration.

35. The device according to claim 34, characterized in that The intra-carrier sidelink resource configuration of the neighboring cell refers to the sidelink resource configuration of the same frequency as the frequency adopted by the neighboring cell, or the sidelink resource configuration on the same carrier as the carrier adopted by the neighboring cell; the inter-carrier sidelink resource configuration of the neighboring cell refers to the sidelink resource configuration of a frequency different from the frequency adopted by the neighboring cell, or the sidelink resource configuration on the adjacent frequency of the frequency adopted by the neighboring cell, or the sidelink resource configuration on a carrier different from the carrier adopted by the neighboring cell.

36. The device according to any one of claims 31 to 33 and 35, characterized in that The processing unit is specifically configured to: when it is determined based on the sidelink configuration information of the neighboring cell that the neighboring cell provides sidelink resource configuration, determine the frequency point used by the neighboring cell as the frequency point with the highest priority.

37. The device according to claim 36, characterized in that The communication device satisfies one or more of the following conditions: the communication device has sidelink communication capability, the communication device is configured to perform sidelink communication, and the communication device is authorized to perform sidelink communication.

38. The device according to any one of claims 31 to 33 and 35, characterized in that The processing unit is specifically configured to: when the communication device is configured to use both the first radio access technology and the second radio access technology for sidelink communication, determine, as the frequency with the highest priority, a frequency point used by the neighboring cell that provides both a sidelink resource configuration using the first radio access technology and a sidelink resource configuration using the second radio access technology; or In a case where the communication device is configured to use only the first radio access technology for sidelink communication, determining a frequency used by the neighboring cell that provides a sidelink resource configuration using the first radio access technology as a frequency with the highest priority; or In a case where the communication device is configured to use only the second radio access technology for sidelink communication, a frequency point used by the neighboring cell configured with sidelink resources using the second radio access technology is determined as a frequency point with the highest priority.

39. The device according to claim 38, characterized in that In a case where the communication device is configured to use both the first radio access technology and the second radio access technology for sidelink communication, the communication device satisfies one or more of the following conditions: the communication device has the capability of using both the first radio access technology and the second radio access technology for sidelink communication; the communication device is authorized to use both the first radio access technology and the second radio access technology for sidelink communication; or In a case where the communication device is configured to use only the first radio access technology for sidelink communication, the communication device satisfies one or more of the following conditions: the communication device has the capability of using the first radio access technology for sidelink communication, and the communication device is authorized to use the first radio access technology for sidelink communication; or When the communication device is configured to use only the second radio access technology for sidelink communication, the communication device satisfies one or more of the following conditions: the communication device has the ability to use the second radio access technology for sidelink communication, and the communication device is authorized to use the second radio access technology for sidelink communication.

40. The device according to any one of claims 31-33, 35, and 39, characterized in that One bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and / or one bit is used to indicate whether the neighboring cell only provides an anchor carrier.

41. The device according to any one of claims 31 to 33, 35 and 39, characterized in that Two bits are used to indicate whether the neighboring cell provides sidelink resource configuration using the first radio access technology and / or the second radio access technology.

42. The device according to any one of claims 31-33, 35, and 39, characterized in that The sidelink resource configuration includes sidelink transmission resource configuration and / or sidelink reception resource configuration.

43. The device according to any one of claims 31 to 33, 35 and 39, characterized in that The neighboring cell not providing sidelink resource configuration indicates that the neighboring cell does not provide sidelink resource configuration through system information or dedicated signaling.

44. The device according to any one of claims 31 to 33, 35 and 39, characterized in that The neighboring cell not providing sidelink resource configuration indicates that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

45. The device according to any one of claims 30-33, 35, and 39, characterized in that The sidelink configuration information of the neighboring cell includes one or more of the following information: the quality of service (QoS) profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; information on whether the neighboring cell has a sidelink radio bearer configuration with hybrid automatic repeat request (HARQ) enabled; information on whether the neighboring cell has a sidelink radio bearer configuration using radio link control acknowledgment mode (RLC AM); the sidelink resource pool index provided by the neighboring cell; the minimum channel congestion rate (CBR) index of the sidelink resource pool provided by the neighboring cell; information on whether the neighboring cell has a synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; and the synchronization reference source configuration provided by the neighboring cell.

46. ​​The device according to claim 45, characterized in that The processing unit is specifically used to: when the communication device is configured to transmit services on the side link, determine the frequency used by the neighboring cell that meets the service requirements in the neighboring cell as the frequency with the highest priority according to the side link configuration information of the neighboring cell.

47. A communication device, characterized in that The communication device provides a neighboring area of ​​the first cell, comprising a communication unit and a processing unit, The processing unit is configured to generate sidelink configuration information of the neighboring cell, where the sidelink is a direct communication link between two terminals; The communication unit is used to send the sidelink configuration information of the neighboring cell directly to the terminal located in the first cell on the neighboring cell, and the sidelink configuration information of the neighboring cell is used by the terminal to determine the priority of the frequency point adopted by the neighboring cell.

48. The device according to claim 47, characterized in that The sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell only provides information on the anchor carrier; whether the neighboring cell provides information on the sidelink resource configuration using the first wireless access technology; whether the neighboring cell provides information on the sidelink resource configuration using the second wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the first wireless access technology; whether the neighboring cell only provides information on the anchor carrier for the sidelink using the second wireless access technology.

49. A communication device, characterized in that The communication device provides a neighboring area of ​​the first cell, comprising a communication unit and a processing unit, The processing unit is configured to generate sidelink configuration information of a neighboring cell of the first cell, where the sidelink is a direct communication link between two terminals, and the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the neighboring cell provides information on sidelink resource configuration; whether the neighboring cell provides information on only an anchor carrier; whether the neighboring cell provides information on a sidelink resource configuration using a first radio access technology; whether the neighboring cell provides information on a sidelink resource configuration using a second radio access technology; whether the neighboring cell provides information on only an anchor carrier for a sidelink using the first radio access technology; and whether the neighboring cell provides information on only an anchor carrier for a sidelink using the second radio access technology. The communication unit is used to send the sidelink configuration information of the neighboring cell directly to the terminal located in the first cell in the first cell, and the sidelink configuration information of the neighboring cell is used by the terminal to determine the priority of the frequency point adopted by the neighboring cell.

50. The device according to claim 49, characterized in that The first cell obtains the sidelink configuration information of the neighboring cell through an interface between a network device to which the first cell belongs and a network device to which the neighboring cell belongs.

51. The device according to any one of claims 48 to 50, characterized in that The sidelink resource configuration includes intra-carrier sidelink resource configuration and / or inter-carrier sidelink resource configuration.

52. The device according to claim 51, characterized in that The intra-carrier sidelink resource configuration of the neighboring cell refers to the sidelink resource configuration of the same frequency as the frequency adopted by the neighboring cell, or the sidelink resource configuration on the same carrier as the carrier adopted by the neighboring cell; the inter-carrier sidelink resource configuration of the neighboring cell refers to the sidelink resource configuration of a frequency different from the frequency adopted by the neighboring cell, or the sidelink resource configuration on the adjacent frequency of the frequency adopted by the neighboring cell, or the sidelink resource configuration on a carrier different from the carrier adopted by the neighboring cell.

53. The device according to any one of claims 48 to 50 and 52, characterized in that One bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and / or one bit is used to indicate whether the neighboring cell only provides an anchor carrier.

54. The device according to any one of claims 48 to 50 and 52, characterized in that Two bits are used to indicate whether the neighboring cell provides sidelink resource configuration using the first radio access technology and / or the second radio access technology.

55. The device according to any one of claims 48 to 50 and 52, characterized in that The sidelink resource configuration includes sidelink transmission resource configuration and / or sidelink reception resource configuration.

56. The device according to any one of claims 48 to 50 and 52, characterized in that The neighboring cell not providing sidelink resource configuration indicates that the neighboring cell does not provide sidelink resource configuration through system information or dedicated signaling.

57. The device according to any one of claims 48 to 50 and 52, characterized in that The neighboring cell not providing sidelink resource configuration indicates that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

58. The device according to any one of claims 47 to 50 and 52, characterized in that The sidelink configuration information of the neighboring cell includes one or more of the following information: the quality of service (QoS) profile index corresponding to the sidelink radio bearer configuration provided by the neighboring cell; information on whether the neighboring cell has a sidelink radio bearer configuration with hybrid automatic repeat request (HARQ) enabled; information on whether the neighboring cell has a sidelink radio bearer configuration using radio link control acknowledgment mode (RLC AM); the sidelink resource pool index provided by the neighboring cell; the minimum channel congestion rate (CBR) index of the sidelink resource pool provided by the neighboring cell; information on whether the neighboring cell has a synchronization reference source configuration; the sidelink resource configuration provided by the neighboring cell; the sidelink radio bearer configuration provided by the neighboring cell; and the synchronization reference source configuration provided by the neighboring cell.

59. A communication device, characterized in that include: processor; The processor is connected to a memory, the memory is used to store computer-executable instructions, and the processor executes the computer-executable instructions stored in the memory to implement the method according to any one of claims 1 to 17, or to implement the method according to any one of claims 18 to 29.

60. The device according to claim 59, characterized in that The device is a chip.

61. A communication system, characterized in that include: The communication device according to any one of claims 30-31, 34-46 and the communication device according to any one of claims 47-48, 51-58; Or, the communication device according to any one of claims 32 to 46 and the communication device according to any one of claims 49 to 58.

62. A computer-readable storage medium, characterized in that The method comprises instructions, which, when executed on a computer, cause the computer to execute the method according to any one of claims 1 to 17, or to execute the method according to any one of claims 18 to 29.

63. A computer program product comprising instructions, characterized in that When the instruction is executed on a computer, the computer is enabled to execute the method according to any one of claims 1 to 17, or the method according to any one of claims 18 to 29.

Images