CN114503759A

CN114503759A - Communication method and device

Info

Publication number: CN114503759A
Application number: CN201980101187.5A
Authority: CN
Inventors: 刘俊; 常俊仁
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2022-05-13
Also published as: WO2021088093A1

Abstract

The method includes that a neighboring cell of a first cell can send system information containing sidelink configuration information of the neighboring cell to a terminal in a non-on-demand mode, correspondingly, the terminal receives the system information from the neighboring cell in the non-on-demand mode and determines priority of frequency points adopted by the neighboring cell according to the sidelink configuration information of the neighboring cell, and under the condition, the terminal carrying out sidelink communication can directly obtain the sidelink configuration information of the neighboring cell in the first cell without residing in the neighboring cell, so that the terminal can conveniently carry out cell reselection according to the sidelink configuration information of the neighboring cell.

Description

Communication method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.

Background

Currently, in a New Radio (NR), a System Information Block (SIB) for carrying Sidelink (SL) configuration information in a neighboring cell of a cell may be provided in an on-demand (on-demand) manner, and when the SIB is provided in the on-demand manner, a base station does not broadcast the SIB before receiving a request from a terminal. In this case, if the terminal in idle state (idle) or inactive state (inactive) in the cell performs cell reselection, the terminal is required to reside in the neighboring cell of the cell before acquiring the SIB, and further acquiring SL configuration information, which is not favorable for the terminal performing SL communication to perform cell reselection.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device, which are used for improving the success rate of network access.

In order to achieve the purpose, the application provides the following technical scheme:

in a first aspect, a communication method is provided, including: the terminal receives system information including the sidelink configuration information of the adjacent cell from the adjacent cell of the first cell in a non-on-demand mode, and determines the priority of the frequency point adopted by the adjacent cell according to the sidelink configuration information of the adjacent cell. The sidelink is a direct communication link between the terminal and other terminals. In the method provided by the first aspect, the neighbor cell may send the system information including the SL configuration information of the neighbor cell to the terminal in a non-on-demand manner, and in this case, the terminal performing SL communication may directly obtain the SL configuration information of the neighbor cell in the first cell without residing in the neighbor cell, so that the terminal may conveniently perform cell reselection according to the SL configuration information of the neighbor cell, and improve a network access success rate.

With reference to the first aspect, in a possible implementation manner, a method for a terminal to receive system information from a neighboring cell of a first cell in a non-on-demand manner includes: the terminal receives system information directly from the neighborhood, e.g., the terminal receives system information broadcast by the neighborhood directly from the neighborhood.

With reference to the first aspect, in a possible implementation manner, the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the adjacent cell provides the information of the side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; the neighbor cell only provides information of anchor point carriers for the sidelink adopting the first wireless access technology; the neighbor cell provides information of only the anchor carrier for the sidelink employing the second radio access technology. In the optional method, the terminal may perform cell reselection according to the SL resource configuration of the neighboring cell, for example, the terminal may select a neighboring cell that can provide the SL resource configuration meeting the SL communication requirement, thereby ensuring the SL communication quality after reselecting the neighboring cell.

In a second aspect, a communication method is provided, including: the terminal receives system information including the sidelink configuration information of the adjacent cell of the first cell from the first cell, and determines the priority of the frequency point adopted by the adjacent cell according to the sidelink configuration information of the adjacent cell. 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 adjacent cell provides the information of the side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; the neighbor cell only provides information of anchor point carriers for the sidelink adopting the first wireless access technology; the neighbor cell provides information of only the anchor carrier for the sidelink employing the second radio access technology. In the method provided in the second aspect, the first cell may send the system information including the SL configuration information of the neighboring cell to the terminal, and in this case, the terminal performing SL communication may directly obtain the SL configuration information of the neighboring cell without camping on the neighboring cell, so that the terminal may conveniently perform cell reselection according to the SL configuration information of the neighboring cell, and improve a network access success rate.

With reference to the second aspect, in a possible implementation manner, the receiving, by a terminal, system information from a first cell includes: the terminal receives system information from the first cell in an on-demand or off-demand manner.

With reference to the second aspect, in a possible implementation manner, a terminal receives system information from a first cell in an on-demand manner, where the method includes: a terminal sends a request message to a first cell, wherein the request message is used for requesting the configuration information of a side link of a neighboring cell; the terminal receives system information from a first cell.

With reference to the second aspect, in a possible implementation manner, the receiving, by a terminal, system information from a first cell in a non-on-demand manner includes: the terminal receives system information directly from the first cell.

With reference to 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.

With reference to the first aspect or the second aspect, in a possible implementation manner, the sidelink resource configuration includes an intra-carrier sidelink resource configuration and/or an inter-carrier sidelink resource configuration.

With reference to the first aspect or the second aspect, in a possible implementation manner, the configuration of the uplink resources inside the carrier of the neighboring cell refers to the configuration of the uplink resources of the frequency point that is the same as the frequency point used in the neighboring cell, or the configuration of the uplink resources on the carrier that is the same as the carrier used in the neighboring cell; the inter-carrier side link resource allocation of the neighboring cell refers to side link resource allocation of a frequency point different from a frequency point adopted by the neighboring cell, or side link resource allocation on a neighboring frequency of a frequency point adopted by the neighboring cell, or side link resource allocation on a carrier different from a carrier adopted by the neighboring cell.

With reference to the first aspect or the second aspect, in a possible implementation manner, the determining, by a terminal, a priority of a frequency point used by a neighboring cell according to sidelink configuration information of the neighboring cell includes: and under the condition that the terminal determines that the side link resource configuration is provided by the adjacent cell according to the side link configuration information of the adjacent cell, the terminal determines the frequency point adopted by the adjacent cell as the frequency point with the highest priority. For a terminal performing sidelink communication, the sidelink communication may be performed only when sidelink resources are needed, and therefore, the optional method determines a frequency point adopted by a neighboring cell capable of providing sidelink resource configuration as a frequency point with the highest priority, and may ensure that the sidelink resources are available after the neighboring cell is reselected.

With reference to the first aspect or the second aspect, in one possible implementation manner, the terminal satisfies one or more of the following conditions: the terminal has sidelink communication capability, the terminal is configured for sidelink communication, and the terminal is authorized for sidelink communication.

With reference to the first aspect or the second aspect, in a possible implementation manner, the determining, by a terminal, a priority of a frequency point used by a neighboring cell according to sidelink configuration information of the neighboring cell includes: under the condition that the terminal is configured to adopt a first wireless access technology for side link communication and also adopt a second wireless access technology for side link communication, the terminal determines a frequency point adopted by a neighboring cell which provides the side link resource configuration adopting the first wireless access technology and also provides the side link resource configuration adopting the second wireless access technology as a frequency point with the highest priority; or, under the condition that the terminal is configured to only adopt the first radio access technology for sidelink communication, the terminal determines the frequency point adopted by the adjacent cell which provides the sidelink resource configuration adopting the first radio access technology as the frequency point with the highest priority; or, in the case that the terminal is configured to perform the sidelink communication only by using the second radio access technology, the terminal determines the frequency point used by the neighboring cell configured by using the sidelink resource of the second radio access technology as the frequency point with the highest priority. In the optional method, when the terminal is currently configured to perform sidelink communication by using a certain (or some) radio access technology, the terminal determines the frequency point adopted by the neighboring cell capable of providing the sidelink resource configuration by using the certain (or some) radio access technology as the frequency point with the highest priority, so that it can be ensured that a proper sidelink resource is available after the neighboring cell is reselected.

With reference to the first aspect or the second aspect, in a possible implementation manner, in a case that a terminal is configured to perform sidelink communication using both a first radio access technology and a second radio access technology, the terminal satisfies one or more of the following conditions: the terminal has the capability of performing sidelink communication by adopting a first wireless access technology and also adopting a second wireless access technology; the terminal is authorized to perform sidelink communications employing a first radio access technology and a second radio access technology; or, in a case where the terminal is configured to employ only the first radio access technology for the sidelink communication, the terminal satisfies one or more of the following conditions: the terminal has the capability of performing sidelink communication by adopting a first wireless access technology, and is authorized to perform the sidelink communication by adopting the first wireless access technology; or, in a case where the terminal is configured to employ only the second radio access technology for the sidelink communication, the terminal satisfies one or more of the following conditions: the terminal is capable of sidelink communications using the second radio access technology, and the terminal is authorized to sidelink communications using the second radio access technology.

With reference to the first aspect or the second aspect, in a possible implementation manner, 1 bit is used to indicate whether the neighboring cell provides the sidelink resource configuration, and/or 1 bit is used to indicate whether the neighboring cell only provides the anchor carrier.

With reference to the first aspect or the second aspect, in a possible implementation manner, whether the neighboring cell provides the sidelink resource configuration using the first radio access technology and/or the second radio access technology is indicated by 2 bits.

With reference to 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.

With reference to the first aspect or the second aspect, in a possible implementation manner, the neighboring cell does not provide the sidelink resource configuration, which means that the neighboring cell does not provide the sidelink resource configuration through the system information, and does not provide the sidelink resource configuration through a dedicated signaling.

With reference to the first aspect or the second aspect, in a possible implementation manner, the neighboring cell does not provide the sidelink resource configuration, which means that the neighboring cell does not provide the sidelink resource configuration through the system information, but provides the sidelink resource configuration through a dedicated signaling.

With reference to the first aspect or the second aspect, in a possible implementation manner, the sidelink configuration information of the neighboring cell includes one or more of the following information: configuring corresponding QoS configuration file index for side-link radio bearer provided by the adjacent cell; whether the adjacent cell has the information of the side-link radio bearer configuration for starting the HARQ or not; whether the adjacent cell has the information of side-link radio bearer configuration adopting RLC AM; a sidelink resource pool index provided by the adjacent cell; a lowest CBR index of a sidelink resource pool provided by an adjacent cell; whether the neighbor cell has the information of the configuration of the synchronous reference source; allocating side link resources provided by the adjacent cell; configuring a side-link radio bearer provided by an adjacent cell; and configuring a synchronous reference source provided by the adjacent cell. According to the possible implementation mode, if the terminal determines that the frequency points with the highest priority are multiple, the terminal can determine the relative priorities of the frequency points according to the information, so that the priorities of the frequency points are determined more accurately.

With reference to the first aspect or the second aspect, in a possible implementation manner, the determining, by a terminal, a priority of a frequency point used by a neighboring cell according to sidelink configuration information of the neighboring cell includes: when the terminal is configured with the service transmission on the side link, the terminal determines the frequency point adopted by the adjacent cell meeting the service requirement in the adjacent cell as the frequency point with the highest priority according to the side link configuration information of the adjacent cell. According to the possible implementation mode, the terminal determines the frequency point adopted by the adjacent cell meeting the service requirement in the adjacent cell as the frequency point with the highest priority, so that the appropriate sidelink resource can be ensured to be available after the adjacent cell is reselected.

In a third aspect, a communication method is provided, where the communication method 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 configuration information of a sidelink of a neighboring cell, wherein the sidelink is a direct communication link between two terminals; and the neighbor cell sends system information to the terminal in the first cell in a non-on-demand mode, and the sidelink configuration information of the neighbor cell in the system information is used for the terminal to determine the priority of the frequency point adopted by the neighbor cell. In the method provided in the third aspect, the neighboring cell may send, to the terminal in a non-on-demand manner, the system information including the SL configuration information of the neighboring cell, and in this case, the terminal performing SL communication may directly obtain, in the first cell, the SL configuration information of the neighboring cell without camping on the neighboring cell, which may facilitate the terminal to perform cell reselection according to the SL configuration information of the neighboring cell, and improve a success rate of network access.

With reference to the third aspect, in a possible implementation manner, the sending, by the neighboring cell, the system information to the terminal located in the first cell in a non-on-demand manner includes: and the neighbor cell directly sends system information to the terminal.

With reference to the third aspect, in a possible implementation manner, the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the adjacent cell provides the information of the side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; the neighbor cell only provides information of anchor point carriers for the sidelink adopting the first wireless access technology; the neighbor cell provides information of only the anchor carrier for the sidelink employing the second radio access technology. In the optional method, the terminal may perform cell reselection according to the SL resource configuration of the neighboring cell, for example, the terminal may select a neighboring cell that can provide the SL resource configuration meeting the SL communication requirement, thereby ensuring the SL communication quality after reselecting the neighboring cell.

In a fourth aspect, a communication method is provided, which is applied to a network device, where 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 for the terminal to determine the priority of a 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 adjacent cell provides the information of the side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; the neighbor cell only provides information of anchor point carriers for the sidelink adopting the first wireless access technology; the neighbor cell provides information of only the anchor carrier for the sidelink employing the second radio access technology. In the method provided in the fourth aspect, the first cell may send the system information including the SL configuration information of the neighboring cell to the terminal, and in this case, the terminal performing SL communication may directly obtain the SL configuration information of the neighboring cell without camping on the neighboring cell, so that the terminal may conveniently perform cell reselection according to the SL configuration information of the neighboring cell, and improve a network access success rate.

With reference to the fourth aspect, in a possible implementation manner, the sending, by a first cell, system information to a terminal located in the first cell includes: the first cell transmits system information to the terminal in an on-demand manner or a non-on-demand manner.

With reference to the fourth aspect, in a possible implementation manner, the sending, by the first cell, the system information to the terminal in an on-demand manner includes: a first cell receives a request message from a terminal, wherein the request message is used for requesting the configuration information of a side link of a neighboring cell; and the first cell sends the system information to the terminal according to the request message.

With reference to the fourth aspect, in a possible implementation manner, the sending, by the first cell, the system information to the terminal in a non-on-demand manner includes: the first cell directly transmits system information to the terminal.

With reference to the fourth 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.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, the sidelink resource configuration includes an intra-carrier sidelink resource configuration and/or an inter-carrier sidelink resource configuration.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, the intra-carrier uplink resource configuration of the neighboring cell refers to the uplink resource configuration of a frequency point that is the same as a frequency point used by the neighboring cell, or the uplink resource configuration on a carrier that is the same as a carrier used by the neighboring cell; the inter-carrier side link resource allocation of the neighboring cell refers to side link resource allocation of a frequency point different from a frequency point adopted by the neighboring cell, or side link resource allocation on a neighboring frequency of a frequency point adopted by the neighboring cell, or side link resource allocation on a carrier different from a carrier adopted by the neighboring cell.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, 1 bit is used to indicate whether the neighboring cell provides the sidelink resource configuration, and/or 1 bit is used to indicate whether the neighboring cell only provides the anchor carrier.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, whether the neighboring cell provides the sidelink resource configuration using the first radio access technology and/or the second radio access technology is indicated by 2 bits.

With reference to 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.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, the neighboring cell does not provide the sidelink resource configuration, which means that the neighboring cell does not provide the sidelink resource configuration through the system information, and does not provide the sidelink resource configuration through a dedicated signaling.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, the neighboring cell does not provide the sidelink resource configuration, which means that the neighboring cell does not provide the sidelink resource configuration through the system information, but provides the sidelink resource configuration through a dedicated signaling.

With reference to the third aspect or the fourth aspect, in a possible implementation manner, the sidelink configuration information of the neighboring cell includes one or more of the following information: configuring corresponding QoS configuration file index for side-link radio bearer provided by the adjacent cell; whether the adjacent cell has the information of the side-link radio bearer configuration for starting the HARQ or not; whether the adjacent cell has the information of side-link radio bearer configuration adopting RLC AM; a sidelink resource pool index provided by the adjacent cell; a lowest CBR index of a sidelink resource pool provided by an adjacent cell; whether the neighbor cell has the information of the configuration of the synchronous reference source; allocating side link resources provided by the adjacent cell; configuring side-link radio bearer provided by the adjacent cell; and configuring a synchronous reference source provided by the adjacent cell. According to the possible implementation mode, if the terminal determines that the frequency points with the highest priority are multiple, the terminal can determine the relative priorities of the frequency points according to the information, so that the priorities of the frequency points are determined more accurately.

In a fifth aspect, a communication method is provided, including: the terminal receives system information including sidelink configuration information of the adjacent cell of the first cell, and determines whether the adjacent cell meets service requirements according to the sidelink configuration information of the adjacent cell of the first cell. Wherein, the side link configuration information of the neighboring cell includes one or more of the following information: whether the adjacent cell provides the information of the side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; the neighbor cell only provides information of anchor point carriers for the sidelink adopting the first wireless access technology; the neighbor cell only provides information of anchor point carriers for the sidelink adopting the second wireless access technology; configuring corresponding QoS configuration file index for side-link radio bearer provided by the adjacent cell; whether the adjacent cell has the information of the side-link radio bearer configuration for starting the HARQ or not; whether the adjacent cell has the information of side-link radio bearer configuration adopting RLC AM; a sidelink resource pool index provided by the adjacent cell; a lowest CBR index of a sidelink resource pool provided by an adjacent cell; whether the neighbor cell has the information of the configuration of the synchronous reference source; allocating side link resources provided by the adjacent cell; configuring side-link radio bearer provided by the adjacent cell; and configuring a synchronous reference source provided by the adjacent cell. In the method provided in the fifth aspect, a terminal performing SL communication may obtain SL configuration information of an adjacent cell, and may determine whether the adjacent cell satisfies a service requirement according to the SL configuration information of the adjacent cell, and in this case, the terminal may reselect to the adjacent cell satisfying the service requirement, thereby preventing subsequent connection establishment or connection recovery, avoiding an increase in power consumption of the terminal, and also improving service transmission performance and continuity.

With reference to the fifth aspect, in a possible implementation manner, the receiving, by a terminal, system information includes: and the terminal receives the system information from the adjacent cell in a non-on-demand mode.

With reference to the fifth aspect, in a possible implementation manner, the receiving, by a terminal, system information from a neighboring cell in a non-on-demand manner includes: and the terminal directly receives the system information from the adjacent region.

With reference to the fifth aspect, in a possible implementation manner, the receiving, by a terminal, system information includes: the terminal receives system information from a first cell.

With reference to the fifth aspect, in a possible implementation manner, the receiving, by a terminal, system information from a first cell includes: the terminal receives system information from the first cell in an on-demand or off-demand manner.

With reference to the fifth aspect, in a possible implementation manner, a terminal receives system information from a first cell in an on-demand manner, where the method includes: a terminal sends a request message to a first cell, wherein the request message is used for requesting the configuration information of a side link of a neighboring cell; the terminal receives system information from a first cell.

With reference to the fifth aspect, in a possible implementation manner, the receiving, by the terminal, system information from the first cell in a non-on-demand manner includes: the terminal receives system information directly from the first cell.

With reference to the fifth 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.

With reference to the fifth aspect, in a possible implementation manner, the sidelink resource configuration includes an intra-carrier sidelink resource configuration and/or an inter-carrier sidelink resource configuration.

With reference to the fifth aspect, in a possible implementation manner, the configuration of the uplink resources inside the carrier of the neighboring cell refers to the configuration of the uplink resources of the frequency point that is the same as the frequency point used in the neighboring cell, or the configuration of the uplink resources on the carrier that is the same as the carrier used in the neighboring cell; the inter-carrier side link resource allocation of the neighboring cell refers to side link resource allocation of a frequency point different from a frequency point adopted by the neighboring cell, or side link resource allocation on a neighboring frequency of a frequency point adopted by the neighboring cell, or side link resource allocation on a carrier different from a carrier adopted by the neighboring cell.

With reference to the fifth aspect, in a possible implementation manner, 1 bit is used to indicate whether the neighboring cell provides the sidelink resource configuration, and/or 1 bit is used to indicate whether the neighboring cell only provides the anchor carrier.

With reference to the fifth aspect, in a possible implementation manner, whether the neighboring cell provides the sidelink resource configuration using the first radio access technology and/or the second radio access technology is indicated by 2 bits.

With reference to the fifth aspect, in a possible implementation manner, the sidelink resource configuration includes a sidelink transmission resource configuration, and/or a sidelink reception resource configuration.

With reference to the fifth aspect, in a possible implementation manner, that the neighboring cell does not provide the sidelink resource configuration means that the neighboring cell does not provide the sidelink resource configuration through the system information, and does not provide the sidelink resource configuration through a dedicated signaling.

With reference to the fifth aspect, in a possible implementation manner, that the neighboring cell does not provide the sidelink resource configuration means that the neighboring cell does not provide the sidelink resource configuration through the system information, but provides the sidelink resource configuration through a dedicated signaling.

With reference to the fifth aspect, in a possible implementation manner, the method further includes: and under the condition that the side link configuration information of the adjacent cell does not meet the service requirement, the terminal does not preferentially reselect to the adjacent cell. The possible implementation mode can avoid reselecting the adjacent cell which does not meet the service requirement.

With reference to the fifth aspect, in a possible implementation manner, the method further includes: and under the condition that the side link configuration information of the adjacent cell does not meet the service requirement, the terminal avoids reselecting the adjacent cell. The possible implementation mode can avoid reselecting the adjacent cell which does not meet the service requirement.

With reference to the fifth aspect, in a possible implementation manner, the method further includes: the terminal removes the adjacent cell of which the side link configuration information does not meet the service requirement from the first candidate cell list to obtain a second candidate cell list; if the number of the cells in the second candidate cell list is larger than 0, the terminal reselects the cells in the second candidate cell list; and if the number of the cells in the second candidate cell list is equal to 0, the terminal adds the removed cells into the second candidate cell list and performs cell reselection in the second candidate cell list after the cells are added. The possible implementation mode can avoid reselecting the adjacent cell which does not meet the service requirement.

With reference to the fifth aspect, in a possible implementation manner, the method further includes: the terminal adds the adjacent cell of which the side link configuration information in the first candidate cell list meets the service requirement into the second candidate cell list; if the number of the cells in the second candidate cell list is larger than 0, the terminal reselects the cells in the second candidate cell list; and if the number of the cells in the second candidate cell list is equal to 0, the terminal reselects the cells in the first candidate cell list. The possible implementation mode can avoid reselecting the adjacent cell which does not meet the service requirement. In a sixth aspect, a communication method is provided and applied to a network device, where the network device provides a neighboring cell of 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 in a non-on-demand mode, wherein the sidelink configuration information of the neighboring cell in the system information is used for the terminal to determine whether the neighboring cell meets a service requirement. Wherein, the side link configuration information of the neighboring cell includes one or more of the following information: whether the adjacent cell provides the information of the side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; the neighbor cell only provides information of anchor point carriers for the sidelink adopting the first wireless access technology; the neighbor cell only provides information of anchor point carriers for the sidelink adopting the second wireless access technology; configuring corresponding QoS configuration file index for side-link radio bearer provided by the adjacent cell; whether the adjacent cell has the information of the side-link radio bearer configuration for starting the HARQ or not; whether the adjacent cell has the information of side-link radio bearer configuration adopting RLC AM; a sidelink resource pool index provided by the adjacent cell; a lowest CBR index of a sidelink resource pool provided by an adjacent cell; whether the neighbor cell has the information of the configuration of the synchronous reference source; allocating side link resources provided by the adjacent cell; configuring side-link radio bearer provided by the adjacent cell; configuring a synchronous reference source provided by a neighboring cell; the sidelink is a direct communication link between two terminals. In the method provided by the sixth aspect, a terminal performing SL communication may obtain SL configuration information of an adjacent cell, and determine whether the adjacent cell meets a service requirement according to the SL configuration information of the adjacent cell, and under this condition, the terminal may reselect to the adjacent cell that meets the service requirement, thereby preventing subsequent connection establishment or connection recovery, avoiding an increase in power consumption of the terminal, and also improving service transmission performance and continuity.

With reference to the sixth aspect, in a possible implementation manner, the sending, by the neighboring cell, the system information to the terminal located in the first cell in a non-on-demand manner includes: and the neighbor cell directly sends system information to the terminal.

In a seventh aspect, a communication method is provided, which is applied to a network device, where 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 for the terminal to determine whether the neighboring cell meets a service requirement. Wherein, the side link configuration information of the neighboring cell includes one or more of the following information: whether the adjacent cell provides the information of the side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; the neighbor cell only provides information of anchor point carriers for the sidelink adopting the first wireless access technology; the neighbor cell only provides information of anchor point carriers for the sidelink adopting the second wireless access technology; configuring corresponding QoS configuration file index for side-link radio bearer provided by the adjacent cell; whether the adjacent cell has the information of the side-link radio bearer configuration for starting the HARQ or not; whether the adjacent cell has the information of side-link radio bearer configuration adopting RLC AM; a sidelink resource pool index provided by the adjacent cell; a lowest CBR index of a sidelink resource pool provided by an adjacent cell; whether the neighbor cell has the information of the configuration of the synchronous reference source; allocating side link resources provided by the adjacent cell; configuring side-link radio bearer provided by the adjacent cell; configuring a synchronous reference source provided by a neighboring cell; the sidelink is a direct communication link between two terminals. In the method provided by the seventh aspect, the terminal performing SL communication may obtain SL configuration information of the neighboring cell, and may determine whether the neighboring cell meets the service requirement according to the SL configuration information of the neighboring cell, and in this case, the terminal may reselect to the neighboring cell meeting the service requirement, thereby preventing subsequent connection establishment or connection recovery, avoiding an increase in power consumption of the terminal, and also improving service transmission performance and continuity.

With reference to the seventh aspect, in a possible implementation manner, the sending, by the first cell, system information to a terminal located in the first cell includes: the first cell transmits system information to the terminal in an on-demand manner or a non-on-demand manner.

With reference to the seventh aspect, in a possible implementation manner, the sending, by the first cell, the system information to the terminal in an on-demand manner includes: a first cell receives a request message from a terminal, wherein the request message is used for requesting the configuration information of a side link of a neighboring cell; and the first cell sends the system information to the terminal according to the request message.

With reference to the seventh aspect, in a possible implementation manner, the sending, by the first cell, the system information to the terminal in a non-on-demand manner includes: the first cell directly transmits system information to the terminal.

With reference to the seventh 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.

With reference to the sixth aspect or the seventh aspect, in a possible implementation manner, the sidelink resource configuration includes an intra-carrier sidelink resource configuration and/or an inter-carrier sidelink resource configuration.

With reference to the sixth aspect or the seventh aspect, in a possible implementation manner, the uplink resource configuration inside the carrier of the neighboring cell refers to the uplink resource configuration of a frequency point that is the same as the frequency point used by the neighboring cell, or the uplink resource configuration on a carrier that is the same as the carrier used by the neighboring cell; the inter-carrier side link resource allocation of the neighboring cell refers to side link resource allocation of a frequency point different from a frequency point adopted by the neighboring cell, or side link resource allocation on a neighboring frequency of a frequency point adopted by the neighboring cell, or side link resource allocation on a carrier different from a carrier adopted by the neighboring cell.

With reference to the sixth aspect or the seventh aspect, in a possible implementation manner, 1 bit is used to indicate whether the neighboring cell provides the sidelink resource configuration, and/or 1 bit is used to indicate whether the neighboring cell only provides the anchor carrier.

With reference to the sixth aspect or the seventh aspect, in a possible implementation manner, whether the neighboring cell provides the sidelink resource configuration using the first radio access technology and/or the second radio access technology is indicated by 2 bits.

With reference to the sixth aspect or the seventh aspect, in a possible implementation manner, the sidelink resource configuration includes a sidelink transmission resource configuration, and/or a sidelink reception resource configuration.

With reference to the sixth aspect or the seventh aspect, in a possible implementation manner, the neighboring cell does not provide the sidelink resource configuration, which means that the neighboring cell does not provide the sidelink resource configuration through the system information, and does not provide the sidelink resource configuration through a dedicated signaling.

With reference to the sixth aspect or the seventh aspect, in a possible implementation manner, that the neighboring cell does not provide the sidelink resource configuration means that the neighboring cell does not provide the sidelink resource configuration through the system information, but provides the sidelink resource configuration through a dedicated signaling.

In an eighth aspect, there is provided a communication apparatus comprising: the functional units for performing any one of the methods provided by the first aspect, wherein the actions performed by the functional units are implemented by hardware or by hardware executing corresponding software. For example, the communication device may include a communication unit for receiving and/or transmitting a signal and a processing unit for performing information processing.

In a ninth aspect, there is provided a communication apparatus comprising: the functional units for executing any one of the methods provided by the second aspect, wherein the actions performed by the functional units are implemented by hardware or by hardware executing corresponding software. For example, the communication device may include a communication unit for receiving and/or transmitting a signal and a processing unit for performing information processing.

In a tenth aspect, there is provided a communication apparatus comprising: the functional units for executing any one of the methods provided by the third aspect, wherein the actions performed by the functional units are implemented by hardware or by hardware executing corresponding software. For example, the communication device may include a communication unit for receiving and/or transmitting a signal and a processing unit for performing information processing.

In an eleventh aspect, there is provided a communication apparatus comprising: functional units for executing any method provided by the fourth aspect, wherein the actions performed by the functional units are implemented by hardware or by hardware executing corresponding software. For example, the communication device may include a communication unit for receiving and/or transmitting a signal and a processing unit for performing information processing.

In a twelfth aspect, a communication apparatus is provided, including: the functional units for executing any one of the methods provided by the fifth aspect, wherein the actions performed by the functional units are implemented by hardware or by hardware executing corresponding software. For example, the communication device may include a communication unit for receiving and/or transmitting a signal and a processing unit for performing information processing.

In a thirteenth aspect, a communication apparatus is provided, including: the functional units for executing any one of the methods provided by the sixth aspect, wherein the actions executed by the functional units are implemented by hardware or by hardware executing corresponding software. For example, the communication device may include a communication unit for receiving and/or transmitting a signal and a processing unit for performing information processing.

In a fourteenth aspect, a communication apparatus is provided, including: functional units for executing any one of the methods provided by the seventh aspect, wherein the actions performed by the functional units are implemented by hardware or by hardware executing corresponding software. For example, the communication device may include a communication unit for receiving and/or transmitting a signal and a processing unit for performing information processing.

In a fifteenth aspect, a communication device is provided, comprising: a processor. The processor is connected with the memory, and the memory is used for storing computer-executable instructions, and the processor executes the computer-executable instructions stored by the memory, so as to realize any one of the methods provided by any one of the first aspect to the seventh aspect. The memory and the processor may be integrated together or may be separate devices. If the latter, the memory may be located within the communication device or may be located outside the communication device.

In one possible implementation, the processor includes logic circuitry and further includes at least one of an input interface and an output interface. Wherein the output interface is used for executing the sent action in the corresponding method, and the input interface is used for executing the received action in the corresponding method.

In one possible implementation, the communication device further includes a communication interface and a communication bus, and the processor, the memory, and the communication interface are connected by the communication bus. The communication interface is used for executing the actions of transceiving in the corresponding method. The communication interface may also be referred to as a transceiver. Optionally, the communication interface comprises at least one of a transmitter and a receiver, in which case the transmitter is configured to perform the act of transmitting in the respective method and the receiver is configured to perform the act of receiving in the respective method.

In one possible implementation, the communication device is in the form of a product of chips.

In a sixteenth aspect, there is provided a communication system comprising: the communication device provided by the eighth aspect and the communication device provided by the tenth aspect; alternatively, the communication apparatus provided by the ninth aspect and the communication apparatus provided by the eleventh aspect; the communication device provided by the twelfth aspect described above and the communication device provided by the thirteenth or fourteenth aspect described above.

A seventeenth aspect provides a computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform any one of the methods provided by any one of the first to seventh aspects.

In an eighteenth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform any one of the methods provided in any one of the first to seventh aspects.

For technical effects brought by any implementation manner of the eighth aspect to the eighteenth aspect, reference may be made to the technical effects brought by corresponding implementation manners of the first aspect to the seventh aspect, and details are not repeated here.

Drawings

Fig. 1 is a schematic diagram of a network architecture according to an embodiment of the present application;

FIG. 2 is a schematic view of a V2X communication;

fig. 3 to fig. 6 are flowcharts of a communication method according to an embodiment of the present application, respectively;

fig. 7 is a schematic diagram illustrating a communication device according to an embodiment of the present disclosure;

fig. 8 and fig. 9 are schematic hardware structures of a communication apparatus according to an embodiment of the present application.

Detailed Description

In the description of this application, "/" means "or" unless otherwise stated, for example, A/B may mean A or B. "and/or" herein is merely an association describing an associated object, and means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. Further, "at least one" means one or more, "a plurality" means two or more. The terms "first", "second", and the like do not necessarily limit the number and execution order, and the terms "first", "second", and the like do not necessarily limit the difference.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

The network element to which the present application relates includes a network device and a terminal in a communication system. Referring to fig. 1, a method provided in an embodiment of the present application mainly relates to communication between a terminal and a terminal, and communication between the terminal and a network device. The terminal and the network equipment can communicate through a Uu port, and the terminal can communicate through a PC5 port. A communication link for performing direct communication between a terminal and a terminal may be referred to as an SL or a side link. In the embodiment of the present application, two terminals performing SL communication may access the same network device, for example, terminal 1 and terminal 2, or may access different network devices (for example, terminal 2 and terminal 3). On the SL, the sending terminal can directly send data to the receiving terminal without sending the data to the network device first, and then to the receiving terminal through the forwarding of the core network, which can greatly reduce the transmission delay of the data.

The communication system in the embodiment of the present application includes, but is not limited to, a Long Term Evolution (LTE) system, a fifth generation (5G) system, an NR system, a Wireless Local Area Network (WLAN) system, and a future evolution system or a multiple communication convergence system. For example, the method provided by the embodiment of the present application may be specifically applied to an evolved-terrestrial radio access network (E-UTRAN) and a next generation radio access network (NG-RAN) system.

The network device in the embodiment of the present application is an entity for transmitting a signal, or receiving a signal, or transmitting a signal and receiving a signal on a network side. The network device may be a device deployed in a Radio Access Network (RAN) to provide a wireless communication function for a terminal, and may be, for example, a Transmission Reception Point (TRP), a base station (e.g., an evolved NodeB (eNB or eNodeB), a next generation base station (gNB), a next generation eNB (ng-eNB), etc.), various control nodes (e.g., a network controller, a radio controller (e.g., a radio controller in a Cloud Radio Access Network (CRAN) scenario)), a Road Side Unit (RSU), etc. Specifically, the network device may be a macro base station, a micro base station (also referred to as a small station), a relay station, an Access Point (AP), or the like in various forms, and may also be an antenna panel of the base station. The control node may be connected to a plurality of base stations, and configure resources for a plurality of terminals under the coverage of the plurality of base stations. In systems using different Radio Access Technologies (RATs), the names of devices that function as base stations may differ. For example, the LTE system may be referred to as eNB or eNodeB, and the 5G system or NR system may be referred to as gNB, and the application does not limit the specific names of the base stations. The network device may also be a network device in a Public Land Mobile Network (PLMN) for future evolution, and the like.

The terminal in the embodiment of the present application is an entity for receiving a signal, or transmitting a signal, or both receiving a signal and transmitting a signal, on the user side. The terminal is used to provide one or more of voice services and data connectivity services to the user. A terminal can also be called a User Equipment (UE), a terminal device, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal may be a vehicle networking (V2X) device, such as a smart car (smart car or interactive car), a digital car (digital car), an unmanned car (unmanned car or drive car or pilot car or auto-mobile), an automatic car (self-driving car or auto-mobile car), a pure electric car (pure EV or Battery EV), a hybrid electric car (HEV), a Range Extended EV (REEV), a plug-in hybrid electric car (plug-in, PHEV), a new energy vehicle (new energy vehicle), and the like. The terminal may also be a device-to-device (D2D) device, such as an electric meter, water meter, etc. The terminal may also be a Mobile Station (MS), a subscriber unit (subscriber unit), a drone, an internet of things (IoT) device, a station in a WLAN (ST), a cellular phone (cellular phone), a smart phone (smart phone), a cordless phone, a wireless data card, a tablet, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a laptop computer (laptop computer), a Machine Type Communication (MTC) terminal, a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device (also referred to as a wearable smart device). The terminal may also be a terminal in a next generation communication system, e.g. a terminal in a 5G system or a terminal in a PLMN for future evolution, a terminal in an NR system, etc.

The method provided by the embodiment of the application can be applied to but not limited to the following fields: D2D, V2X, unmanned driving (unmanned driving), Automatic Driving (ADS), driver Assistance Driving (ADAS), intelligent driving (intelligent driving), connected driving (connected driving), intelligent network driving (intelligent network driving), vehicle sharing (car sharing), and the like.

The vehicle acquires the road condition information or receives the information service in time through communication modes such as vehicle-to-vehicle (V2V), vehicle-to-roadside infrastructure (V2I), vehicle-to-pedestrian communication (V2P), or vehicle-to-network (V2N), which may be collectively referred to as V2X communication.

Taking the most common V2V communication and V2I communication as examples, fig. 2 is a schematic diagram of V2V communication and V2I communication. As shown in fig. 2, the vehicles communicate with each other through V2V, so that the information such as the speed, the driving direction, the specific position, whether the emergency brake is stepped on, etc. of the vehicles can be broadcast to the surrounding vehicles, and the drivers of the surrounding vehicles can better perceive the traffic conditions outside the sight distance by acquiring the information, thereby making advance prejudgment on dangerous conditions and making avoidance. For V2I communication, in addition to the above-mentioned interaction of security information, roadside infrastructure, for example, RSU, can provide various service information and access to data network for vehicles, greatly improving traffic intelligence. When the method provided by the embodiment of the present application is applied in the V2I scenario, the network device in the present application may be a roadside infrastructure, for example, an RSU, and the terminal may be a vehicle.

In order to make the present application clearer, a brief description of some concepts related to the present application will be given first.

1. SL resource

When two terminals perform SL communication, the following two types of SL resources may be used.

First, dedicated resources

The dedicated resource may be a resource scheduled by the network device for the terminal by the mode 1(mode1) resource configuration mode (name in NR) or the mode 3(mode3) resource configuration mode (name in LTE). In mode1 or mode3, the network device may semi-statically or dynamically allocate SL resources to the terminal through a Radio Network Temporary Identifier (RNTI) of the terminal. Mode1 or mode3 mainly supports connected terminals.

The dedicated resources include Configuration Granted (CG) resources, for example, type 1(type1) CG (SL granted grant type-1) resources, type 2(type2) CG (SL granted grant type-2) resources, grant free (SL grant free) resources, and Semi-Persistent Scheduling (SL Semi-Persistent Scheduling, SL SPS) resources. The dedicated resources also include Dynamic Grant (DG) resources.

Mode1 or mode3 in this embodiment of the present application refers to a resource allocation method based on base station scheduling, and includes not only mode1 or mode3, but also a resource allocation method based on base station scheduling in the future.

Second, competing for resources

The contention resource may be a resource allocated by the network device for the terminal through a mode 2(mode2) resource configuration mode (name in NR) or a mode 4(mode4) resource configuration mode (name in LTE). In mode2 or mode4, when the terminal is within the communication coverage of the network device, the network device may configure a SL resource pool for the terminal through broadcasted system information or dedicated signaling, where the SL resource pool is shared by multiple terminals. The terminal transmits a control signal and/or a data signal by contending with other terminals to obtain an appropriate SL resource in the SL resource pool. Modes 2 and 4 support idle, inactive, and connected terminals.

Mode2 or mode4 in this embodiment of the present application both refer to terminal autonomous resource allocation, and are not limited to mode2 or mode4, but also include future terminal autonomous resource allocation.

The present application relates primarily to the second type of SL resource.

2. Cell selection and cell reselection (cell reselection)

The cell selection refers to a process of selecting a cell to camp when the terminal is powered on or enters a coverage area from a blind area. When the terminal is started or enters the coverage area from the blind area, the terminal selects the PLMN and carries out cell search, determines the cells meeting certain conditions, and selects one cell from the cells meeting certain conditions for residing through cell selection.

The cell reselection refers to cell reselection of the terminal in an idle state or an inactive state. When a terminal resides in a cell, the signal strength of the current cell and the neighboring cells continuously changes along with the movement of the terminal, and therefore, the terminal needs to monitor the signal quality of the neighboring cells and the current cell and select a best cell to provide service through cell reselection.

Cell reselection includes both intra-frequency cell reselection and inter-frequency cell reselection, including inter-RAT cell reselection. Wherein the inter-frequency (inter-frequency) cell reselection includes inter-frequency cell reselection without crossing a RAT and cross-RAT cell reselection.

When the terminal reselects the cell, the terminal sorts the priority of each frequency point (frequency) according to a certain rule, and determines whether the cells on the frequency points meet the conditions in sequence according to the sequence of the priority of each frequency point from high to low. And if the plurality of adjacent cells on the highest priority accord with the conditions, the terminal selects the optimal cell on the frequency point with the highest priority. And for the frequency points with the same priority (or the same frequency), reselecting the cell by adopting the R criterion of reselecting the cell with the same frequency. In the embodiment of the application, the frequency point may also be replaced by a carrier, and the carrier may also be replaced by a frequency point.

When the cell reselection is carried out, the terminal determines the cells meeting the S criterion in the candidate cell list, and carries out the cell reselection in the cells meeting the S criterion. The candidate cell list in the following may refer to an initial candidate cell list, or may refer to a list composed of cells satisfying the S criterion in the candidate cell set.

3. Cell reselection priority

The cell reselection priority is the priority of each frequency point during the cell reselection. The existing cell reselection priorities of terminals performing SL communication are described below by cases 1 and 2. In the following description, NR Uu refers to Uu port of NR, NR SL refers to SL of NR, LTE Uu refers to Uu port of LTE, LTE SL refers to SL of LTE, NR V2X refers to V2X of NR, NR V2X SIB refers to SIB in V2X of NR, and LTE V2X refers to V2X of LTE.

Case 1, cell reselection priority during scheduling in the same RAT

Taking NR as an example, in a neighboring cell of a cell in which a terminal resides, if a network device performs NR SL configuration for the terminal in the neighboring cell through NR Uu, the network device may provide intra-carrier (intra-carrier) NR SL configuration, inter-carrier (inter-carrier) NR SL configuration, and an NR anchor (anchor) carrier providing NR SL configuration for the terminal in the neighboring cell through NR Uu.

The intra-carrier NR SL configuration refers to an NR SL configuration of NR SL frequency points identical to the NR Uu frequency points. The inter-carrier NR SL configuration refers to an NR SL configuration of NR SL frequency points different from NR Uu frequency points. When the network equipment provides an intra-carrier NR SL configuration and an inter-carrier NR SL configuration, specific SL resource configuration is provided, when the network equipment provides an NR anchor carrier, the network equipment does not provide the SL configuration, and the terminal searches for the NR SL configuration on the NR anchor carrier. The neighbor cell may indicate the anchor carrier by the parameter anchor carrier freqlist.

Under the condition 1, in a neighboring cell of a cell where a terminal resides, an NR Uu frequency point capable of providing intra-carrier NR SL configuration and inter-carrier NR SL configuration is a frequency point with the highest priority in cell reselection priorities, two Uu frequency points of intra-carrier NR SL configuration and inter-carrier NR SL configuration are respectively provided, relative priorities are not distinguished, and in addition, only an NR Uu frequency point of NR anchor carrier configuration is not preferentially provided.

In NR V2X, the terminal needs to know whether the neighboring cell provides the SIB that can carry the NR SL configuration by reading SIB scheduling information in SIB1 of the neighboring cell. Wherein the SIBs providing the NR SL configuration may be provided in an on-demand or off-demand manner. The on-demand manner means that the network device transmits the SIB to the terminal after receiving a request of the terminal. Illustratively, the SIB may be an NR V2X SIB, the NR V2X SIB may include one or more of the intra-carrier NR SL configurations, inter-carrier NR SL configurations, and NR anchor carrier configurations providing NR SL configurations described above.

Case 2, cell reselection priority when scheduling across RATs (i.e., different RATs)

In a neighboring cell of a cell where a terminal resides, if a network device performs NR SL configuration for the terminal through an LTE Uu, the network device provides inter-carrier NR SL configuration, an LTE anchor carrier for NR SL configuration, and an NR anchor carrier for NR SL configuration for the terminal in the neighboring cell through the LTE Uu. The inter-carrier NR SL configuration refers to NR SL configuration of NR SL frequency points different from LTE Uu frequency points. In this case, in the neighboring cell of the cell where the terminal resides, the LTE Uu frequency point configured by the inter-carrier NR SL may be provided as the frequency point with the highest priority in the cell reselection priorities.

In a neighboring cell of a cell where a terminal resides, if a network device performs LTE SL configuration for the terminal through an NR Uu, the network device provides inter-carrier LTE SL configuration, an LTE anchor carrier for LTE SL configuration, and an NR anchor carrier for LTE SL configuration for the terminal in the neighboring cell through the NR Uu. The inter-carrier LTE SL configuration refers to LTE SL configuration of an LTE SL frequency point different from an NR Uu frequency point. In this case, in the neighboring cell of the cell where the terminal resides, the NR Uu frequency point configured by the inter-carrier LTE SL may be provided as the frequency point with the highest priority in the cell reselection priorities.

Under the condition that the network equipment performs LTE SL configuration for the terminal through the LTE Uu, the SIB carrying the LTE SL configuration is the existing SIB. Under the condition that the network equipment performs NR SL configuration for the terminal through the NR Uu, the SIB carrying the NR SL configuration is also the existing SIB. Under the condition that the network device performs NR SL configuration for the terminal through the LTE Uu, the SIB carrying the NR SL configuration is a separate new SIB (e.g., SIB 28). Under the condition that the network device performs LTE SL configuration for the terminal through the NR Uu, the SIB carrying the LTE SL configuration is also a separate new SIB (e.g., SIB 29). In this case, for a terminal to perform cell reselection, the terminal needs to read SIB scheduling information in the SIB1 of the neighboring cell to know whether the neighboring cell provides the SIB of the NR SL configuration and/or the SIB of the LTE SL configuration. For example, if the SIB scheduling information in the SIB1 includes the scheduling information of the existing SIB and the new SIB, it indicates that the neighboring cell may provide the SIB with the NR SL configuration and the SIB with the LTE SL configuration.

It should be noted that, if the network device performs NR SL configuration for the terminal through the LTE Uu, the network device may perform NR SL configuration for the terminal only through the LTE Uu, or may perform NR SL configuration and LTE SL configuration for the terminal through the LTE Uu. If the network device performs LTE SL configuration for the terminal through the NR Uu, the network device may perform LTE SL configuration for the terminal only through the NR Uu, or may perform LTE SL configuration and NR SL configuration for the terminal through the NR Uu. In this case, if the upper layer of the terminal is configured to perform SL communication for the LTE V2X service and the NR V2X service, the frequency point for providing both the LTE SL configuration and the NR SL configuration may have higher priority than the frequency point for providing only the LTE SL configuration or the NR SL configuration.

Based on the above description, the problems in the prior art are summarized below.

Problem 1

For a terminal which needs to perform cell reselection, the terminal may acquire whether the neighboring cell provides an SIB carrying NR SL configuration and/or LTE SL configuration by reading SIB scheduling information in SIB1 of the neighboring cell, but if the SIB is provided in an on-demand manner, the SIB can be acquired only after the terminal is required to reside in the neighboring cell, and then SL configuration information is acquired, so that the terminal performing SL communication cannot determine the priority of a frequency point used by the neighboring cell in a serving cell.

Problem 2

For a terminal that needs to perform cell reselection, the terminal may learn whether the neighboring cell provides an SIB carrying an NR SL configuration and/or an LTE SL configuration by reading SIB scheduling information in an SIB1 of the neighboring cell, and if the SIB is provided in a non-on-demand manner, although the terminal may directly acquire the SIB, the terminal may increase power consumption of the terminal when reading the SIB of multiple neighboring cells.

Problem 3

If a terminal reselects to a cell that does not provide the SL resource configuration or the 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 restoration (for inactive terminals) to obtain the appropriate SL resources or SL configuration from the network device. On the one hand, this increases the power consumption of the handheld (P2X) terminal. On the other hand, the terminal uses a special (explicit) resource pool for service transmission before acquiring an appropriate SL resource or SL configuration, but the performance of the explicit resource pool is unreliable, and especially when the number of terminals used is large, the performance difference with respect to the contention resource is large, which affects the service transmission performance and continuity of the V2X terminal having service transmission, and affects the emergency (critical) service more.

In order to solve the above problem, the present application provides a communication method shown in the following embodiments.

Example one

In the first embodiment, a neighboring cell of a cell in which a terminal resides (in the embodiments of the present application, a cell in which a terminal resides is denoted as a first cell) (in the embodiments of the present application, the neighboring cell of the first cell is simply described as a neighboring cell) sends system information to the terminal in a non-on-demand manner.

Specifically, referring to fig. 3, the communication method according to the first embodiment includes:

301. and generating system information, wherein the system information comprises SL configuration information of a neighboring cell, and the SL is a direct connection communication link between two terminals.

In each embodiment 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 may be the same network device or different network devices. Which will not be described in detail hereinafter.

In step 301, the system information may be generated for a network device to which the neighboring cell belongs (or a network device that provides the neighboring cell), or may be generated for the neighboring cell, and is drawn by taking the neighboring cell generation as an example in fig. 3.

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 (zone) configuration, channel congestion ratio (CBR) related configuration, and other information. Wherein the SL resource configuration may be used to indicate SL resources, e.g., one or more of SL time domain resources, SL frequency domain resources, SL code domain resources, and SL spatial domain resources. Which will not be described in detail hereinafter.

In various embodiments of the present application, the SL resource configuration may be a resource configuration for SL communication, or a resource configuration in the SL communication configuration.

302. And the neighbor cell sends system information to the terminal in a non-on-demand mode. Correspondingly, the terminal receives the system information from the adjacent cell in a non-on-demand mode.

If there are multiple adjacent cells, and each of the multiple adjacent cells can execute step 301 and step 302, the terminal can receive system information sent by the multiple adjacent cells.

For a cell, the non-on-demand mode in each embodiment of the present application refers to a mode of sending information to a terminal independent of a request of the terminal. For the terminal, the non-on-demand mode in each embodiment of the present application refers to a mode that can acquire information without sending a request. In this case, the step 302 may include, when implemented specifically: the neighbor cell directly sends system information to the terminal, and correspondingly, the terminal directly receives the system information from the neighbor cell. In the embodiments of the present application, the terminal directly receiving information means that the terminal does not send a request before receiving information. The cell directly sending information means that the cell does not send information according to the request of the terminal.

Illustratively, the non-on-demand manner may be a broadcast manner, in which case, step 302 may include, in a specific implementation: and the terminal receives the system information broadcasted by the adjacent cell from the adjacent cell correspondingly.

The system information may be a system information block (e.g., a Master Information Block (MIB), an MIB-SL-V2X, an SIB1, etc.) that may not be transmitted in an on-demand manner. For a cell, the on-demand mode in each embodiment of the present application refers to a mode of sending information to a terminal depending on a request of the terminal. For a terminal, the on-demand mode in each embodiment of the present application refers to a mode in which a request needs to be sent to acquire information.

In the embodiment of the present application, information indicating part or all of the information (the part or all of the information is part or all of the system information (e.g., SIB28 and/or SIB 29)) for carrying the SL configuration information may be placed in the system information (e.g., MIB-SL-V2X, or SIB1) in the present application and sent to the terminal, so that the terminal may acquire some information that is not acquired in an on-demand manner. The information indicating part or all of the information may be information directly indicating the part or all of the information, or may be information indirectly indicating the part or all of the information, and the application is not limited thereto.

303. And the terminal determines the priority of the frequency points adopted by the adjacent cell according to the SL configuration information of the adjacent cell.

Optionally, after step 303, the method further includes:

304. and the terminal reselects the cell according to the priority of the frequency point adopted by the neighboring cell.

The specific implementation of step 304 can be found in the prior art, and is not described herein.

In the method provided in the first embodiment, the neighboring cell may send, to the terminal in a non-on-demand manner, the system information including the SL configuration information of the neighboring cell, and in this case, the terminal performing SL communication may directly obtain the SL configuration information of the neighboring cell in the first cell, and does not need to camp on the neighboring cell, so that the terminal may conveniently perform cell reselection according to the SL configuration information of the neighboring cell (that is, may solve problem 1 described above). In addition, the terminal does not need to read the SIB carrying the NR SL configuration and/or the LTE SL configuration, which may avoid increasing the power consumption of the terminal (i.e., may solve the above problem 2).

In addition, the terminal may determine the priority of the frequency point used by the neighboring cell according to the SL configuration information of the neighboring cell, so as to perform cell reselection. For example, the terminal may set the priority of the frequency point used by the neighboring cell that meets the SL communication requirement higher, thereby ensuring that the cell reselected by the terminal meets the SL communication requirement of the terminal.

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

information 1, information whether the neighbor cell provides the SL resource configuration;

information 2, whether the neighboring cell only provides the information of the anchor carrier;

information 3, whether the neighboring cell provides information for adopting the SL resource configuration of the first RAT;

information 4, whether the neighbor cell provides information for adopting SL resource configuration of the second RAT;

information 5, information whether the neighbor cell provides only an anchor carrier for the SL employing the first RAT;

information 6, information whether the neighbor cell provides only the anchor carrier for the SL employing the second RAT.

Illustratively, the first RAT may be LTE and the second RAT may be NR.

Optionally, the SL resource configuration includes a SL transmission resource configuration, and/or a SL reception resource configuration.

Optionally, the SL resource configurations include intra-carrier SL resource configurations (i.e., SL resource configurations carried in intra-carrier SL configurations) and/or inter-carrier SL resource configurations (i.e., SL resource configurations carried in inter-carrier SL configurations). Exemplarily, intra-carrier SL resource configuration of the neighboring cell refers to SL resource configuration of a frequency point the same as a frequency point adopted by the neighboring cell, or SL resource configuration on a carrier the same as a carrier adopted by the neighboring cell; the inter-carrier SL resource configuration of the neighboring cell refers to SL resource configuration of a frequency point different from a frequency point used by the neighboring cell, or SL resource configuration on a neighboring frequency of a frequency point used by the neighboring cell, or SL resource configuration on a carrier different from a carrier used by the neighboring cell. The frequency point or carrier used by the neighboring cell may be a frequency point or carrier used by the neighboring cell at the Uu port.

The information 1 to the information 6 will be described first.

Information 1

In information 1, the neighbor providing SL resource configuration means one of the following meanings:

meaning 1, neighboring cells provide intra-carrier SL resource allocation;

meaning 2, providing inter-carrier SL resource allocation for the neighbor cell;

meaning 3, neighbor provides intra-carrier SL resource allocation and inter-carrier SL resource allocation.

The neighbor not providing the SL resource configuration means that the neighbor does not provide the intra-carrier SL resource configuration and the inter-carrier SL resource configuration.

In addition, optionally, the neighbor cell does not provide the SL resource configuration only to indicate that the neighbor cell does not provide the SL resource configuration through the system information, but does not make a limitation on whether to provide the SL resource configuration through other information. Illustratively, the neighbor cell does not provide the SL resource configuration, which means that the neighbor cell does not provide the SL resource configuration through the system information, nor provides the SL resource configuration through the dedicated signaling; or, the neighbor cell does not provide the SL resource configuration, which means that the neighbor cell does not provide the SL resource configuration through the system information, but provides the SL resource configuration through the dedicated signaling.

Wherein SL resource configurations provided by the system information are resource pool configurations (e.g., mode2 or mode4 resource pool configurations). The SL resource configuration provided by the dedicated signaling may be configured for resource pools or may be configured for non-resource pools (e.g., mode1 or mode3 resource configurations).

It should be noted that, when the neighboring cell does not provide SL resource configuration, the anchor carrier may be provided, or the anchor carrier may not be provided.

In the information 1, optionally, 1 bit is used to indicate whether the neighbor cell provides SL resource configuration. For example, when the bit value is 0, it indicates that the neighbor cell does not provide the SL resource configuration, and when the bit value is 1, it indicates that the neighbor cell provides the SL resource configuration. And vice versa.

In the information 1, further, whether the neighbor provides the intra-carrier SL resource configuration and/or the inter-carrier SL resource configuration may be indicated by a plurality of bits (e.g., 2 bits) in one case. For example, 1 bit of the 2 bits indicates whether the neighbor provides the intra-carrier SL resource configuration, and the other 1 bit of the 2 bits indicates whether the neighbor provides the inter-carrier SL resource configuration. For another example, the difference of 2 bits is used for distinguishing, 00 represents that only the intra-carrier SL resource allocation is provided, 01 represents that only the inter-carrier SL resource allocation is provided, and 10 represents that both the intra-carrier SL resource allocation and the inter-carrier SL resource allocation are provided.

In the information 1, in another case, further, whether the neighbor provides the intra-carrier SL resource configuration, the inter-carrier SL resource configuration, and the anchor carrier may be indicated by a plurality of bits (e.g., 3 bits). For example, the 1 st bit of the 3 bits indicates whether the neighbor provides the intra-carrier SL resource configuration, the 2 nd bit of the 3 bits indicates whether the neighbor provides the inter-carrier SL resource configuration, and the 3 rd bit of the 3 bits indicates whether the neighbor provides the anchor carrier. For another example, the distinction is made by different values of 3 bits, 000 indicates that only the intra-carrier SL resource configuration is provided, 001 indicates that only the inter-carrier SL resource configuration is provided, 010 indicates that only the anchor carrier is provided, 011 indicates that both the intra-carrier SL resource configuration and the inter-carrier SL resource configuration are provided, 100 indicates that both the intra-carrier SL resource configuration and the anchor carrier are provided, 101 indicates that both the inter-carrier SL resource configuration and the anchor carrier are provided, and 111 indicates that both the intra-carrier SL resource configuration, the inter-carrier SL resource configuration and the anchor carrier are provided.

Information 2

In the information 2, the neighboring cell only provides the anchor carrier means that the neighboring cell only provides the anchor carrier and does not provide the SL configuration (naturally, does not provide the SL resource configuration). The neighbor provisioning not only means that the neighbor may provide SL resource configuration or other information in addition to the anchor carrier.

In the information 2, optionally, 1 bit is used to indicate whether the neighboring cell only provides the anchor carrier. For example, when the bit value is 0, it indicates that the neighboring cell only provides the anchor carrier, and when the bit value is 1, it indicates that the neighboring cell not only provides the anchor carrier. And vice versa.

Information 3

In the information 3, optionally, 1 bit is used to indicate whether the neighboring cell provides the SL resource configuration using the first RAT. For example, when the bit value is 0, it indicates that the neighboring cell provides the SL resource configuration using the first RAT, and when the bit value is 1, it indicates that the neighboring cell does not provide the SL resource configuration using the first RAT. And vice versa.

In information 3, in one case, further, whether the neighbor provides the intra-carrier SL resource configuration employing the first RAT and/or the inter-carrier SL resource configuration employing the first RAT may be indicated by a plurality of bits (e.g., 2 bits). For example, 1 bit of the 2 bits indicates whether the neighboring cell provides the intra-carrier SL resource configuration using the first RAT, and the other 1 bit of the 2 bits indicates whether the neighboring cell provides the inter-carrier SL resource configuration using the first RAT. For another example, the difference between the values of the 2 bits is used for distinguishing, 00 represents that only the intra-carrier SL resource configuration using the first RAT is provided, 01 represents that only the inter-carrier SL resource configuration using the first RAT is provided, and 10 represents that the intra-carrier SL resource configuration using the first RAT and the inter-carrier SL resource configuration using the first RAT are provided at the same time.

In the information 3, in another case, further, whether the neighboring cell provides 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 may be indicated by a plurality of bits (e.g., 3 bits). For example, the 1 st bit of the 3 bits indicates whether the neighboring cell provides the intra-carrier SL resource configuration using the first RAT, the 2 nd bit of the 3 bits indicates whether the neighboring cell provides the inter-carrier SL resource configuration using the first RAT, and the 3 rd bit of the 3 bits indicates whether the neighboring cell provides the anchor carrier using the first RAT. For another example, the difference is made by different values of 3 bits, 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 intra-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.

Information 4

In the information 4, optionally, 1 bit is used to indicate whether the neighboring cell provides the SL resource configuration using the second RAT. For example, when the bit value is 0, it indicates that the neighboring cell provides the SL resource configuration using the second RAT, and when the bit value is 1, it indicates that the neighboring cell does not provide the SL resource configuration using the second RAT. And vice versa.

In information 4, in one case, further, whether the neighbor provides the intra-carrier SL resource configuration employing the second RAT and/or the inter-carrier SL resource configuration employing the second RAT may be indicated by a plurality of bits (e.g., 2 bits). For example, 1 bit of the 2 bits indicates whether the neighboring cell provides the intra-carrier SL resource configuration using the second RAT, and the other 1 bit of the 2 bits indicates whether the neighboring cell provides the inter-carrier SL resource configuration using the second RAT. For another example, the difference between the values of the 2 bits is used for distinguishing, 00 represents that only the intra-carrier SL resource configuration using the second RAT is provided, 01 represents that only the inter-carrier SL resource configuration using the second RAT is provided, and 10 represents that the intra-carrier SL resource configuration using the second RAT and the inter-carrier SL resource configuration using the second RAT are provided at the same time.

In the information 4, in another case, further, whether the neighboring cell provides 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 may be indicated by a plurality of bits (e.g., 3 bits). For example, the 1 st bit of the 3 bits indicates whether the neighboring cell provides the intra-carrier SL resource configuration using the second RAT, the 2 nd bit of the 3 bits indicates whether the neighboring cell provides the inter-carrier SL resource configuration using the second RAT, and the 3 rd bit of the 3 bits indicates whether the neighboring cell provides the anchor carrier using the second RAT. For another example, the difference is differentiated by 3 bits, 000 represents that only the intra-carrier SL resource configuration using the second RAT is provided, 001 represents that only the inter-carrier SL resource configuration using the second RAT is provided, 010 represents that only the anchor carrier using the second RAT is provided, 011 represents 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 represents that both the intra-carrier SL resource configuration using the second RAT and the anchor carrier using the second RAT are provided, 101 represents that both the inter-carrier SL resource configuration using the second RAT and the anchor carrier using the second RAT are provided, 111 denotes simultaneously providing an intra-carrier SL resource configuration employing the second RAT, an inter-carrier SL resource configuration employing the second RAT, and an anchor carrier employing the second RAT.

Information 5

In the information 5, that the neighboring cell provides only the anchor carrier for the SL employing the first RAT means that the neighboring cell provides only the anchor carrier employing the first RAT, and does not provide the SL resource configuration of the first RAT. The neighboring cell may provide the SL resource configuration of the first RAT in addition to the anchor carrier of the first RAT for the SL of the first RAT.

In the information 5, optionally, it is indicated by 1 bit whether the neighboring cell provides only the anchor carrier for the SL employing the first RAT. For example, when the bit value is 0, it indicates that the neighboring cell only provides the anchor carrier for the SL using the first RAT, and when the bit value is 1, it indicates that the neighboring cell not only provides the anchor carrier for the SL using the first RAT. And vice versa.

Information 6

In the information 6, that the neighboring cell provides only the anchor carrier for the SL using the second RAT means that the neighboring cell provides only the anchor carrier using the second RAT and does not provide the SL resource configuration of the second RAT. The neighboring cell may provide not only the anchor carrier for the SL employing the second RAT, which means that the neighboring cell may provide the SL resource configuration of the second RAT in addition to the anchor carrier employing the second RAT.

In the information 6, optionally, it is indicated by 1 bit whether the neighboring cell provides only the anchor carrier for the SL employing the second RAT. For example, when the bit value is 0, it indicates that the neighboring cell only provides the anchor carrier for the SL using the second RAT, and when the bit value is 1, it indicates that the neighboring cell not only provides the anchor carrier for the SL using the second RAT. And vice versa.

For the information 3 and the information 4, besides indicating whether the neighboring cell provides the SL resource configuration employing the first RAT or not by using 1 bit and indicating whether the neighboring cell provides the SL resource configuration employing the second RAT or not by using another 1 bit, it may also indicate whether the neighboring cell provides the SL resource configuration employing the first RAT and/or the second RAT or not by using different values of a plurality of bits. Illustratively, 00 indicates that only SL resource configurations employing a first RAT are provided, 01 indicates that only SL resource configurations employing a second RAT are provided, and 10 indicates that SL resource configurations employing both the first RAT and the second RAT are provided. Information 5 and information 6 are similar and will not be described in detail.

In the foregoing embodiment, when the neighboring cell only supports one RAT, in one case, the SL configuration information of the neighboring cell may only include information 1 or information 3 (at this time, the RAT supported by the neighboring cell is the first RAT) or information 4 (at this time, the RAT supported by the neighboring cell is the second RAT), and the terminal may determine whether the neighboring cell provides SL resource configuration according to the information 1 or the information 3 or the information 4. In another case, the SL configuration information of the neighboring cell may include multiple ones of information 1 to information 4, and the terminal determines whether the neighboring cell provides SL resource configuration according to one or more of the multiple ones.

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 further include information 1 and/or information 2.

In addition, when a neighboring cell supports more than two RATs (e.g., 3 or 5 RATs), the SL configuration information of the neighboring cell also includes information whether the neighboring cell provides SL resource configuration employing other RATs (e.g., future evolution RATs) besides the first RAT and the second RAT. At this time, for each RAT, it may be indicated whether the neighboring cell provides the information of the SL resource configuration employing the RAT by 1 bit, or may also be indicated whether the neighboring cell provides the SL resource configuration employing one or more RATs in multiple RATs by different values of multiple bits (for example, 3 or 5 bits).

The implementation of step 303 is different when the SL configuration information of the neighboring cell is different, and the following description is made by cases 1 to 4.

In case 1, the SL configuration information of the neighboring cell at least includes information 1.

In case 1, step 303, when implemented specifically, comprises: and under the condition that the terminal determines that the neighbor cell provides SL resource configuration according to the SL configuration information of the neighbor cell, the terminal determines the frequency point adopted by the neighbor cell as the frequency point with the highest priority.

Specifically, the terminal determines whether the neighbor cell provides SL resource configuration according to the information 1.

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

In case 2, the SL configuration information of the neighboring cell at least includes information 2.

In case 2, step 303, when implemented specifically, includes: and under the condition that the terminal determines that the adjacent cell does not provide SL resource configuration according to the SL configuration information of the adjacent cell, the terminal does not determine the frequency point adopted by the adjacent cell as the frequency point with the highest priority.

Specifically, the terminal determines that the neighbor cell does not provide SL resource configuration according to the information 2.

In case 2, optionally, the terminal has SL communication capability and is configured for SL communication.

In case 3, the SL configuration information of the neighboring cell at least includes information 3 and information 4.

In case 3, step 303, when implemented specifically, comprises:

under the condition that the terminal is configured to adopt a first RAT for SL communication and adopt a second RAT for SL communication, the terminal determines a frequency point adopted by a neighboring cell which provides the SL resource configuration adopting the first RAT and also provides the SL resource configuration adopting the second RAT as a frequency point with the highest priority; alternatively, the first and second electrodes may be,

when the terminal is configured to perform SL communication only by using the first RAT, the terminal determines a frequency point adopted by a neighboring cell providing SL resource configuration using the first RAT (at this time, the neighboring cell may provide SL resource configuration using the second RAT, or may not provide SL resource configuration using the second RAT) as a frequency point with the highest priority; alternatively, the first and second electrodes may be,

when the terminal is configured to perform SL communication only by using the second RAT, the terminal determines the frequency point used by the SL resource configuration of the second RAT as the frequency point with the highest priority (at this time, the adjacent cell may provide the SL resource configuration using the first RAT, or may not provide the SL resource configuration using the first RAT).

In case 4, the SL configuration information of the neighboring cell at least includes information 5 and information 6.

In case 4, the step 303, when implemented specifically, includes:

under the condition that the terminal is configured to adopt both the first RAT for SL communication and the second RAT for SL communication, the terminal determines the frequency point adopted by the adjacent region which only provides the anchor carrier for the SL adopting the first RAT and/or only provides the anchor carrier for the SL adopting the second RAT as the frequency point with the highest priority; alternatively, the first and second electrodes may be,

under the condition that the terminal is configured to only adopt the first RAT for SL communication, the terminal does not determine the frequency point adopted by the adjacent cell which only provides the anchor carrier for the SL adopting the first RAT as the frequency point with the highest priority; alternatively, the first and second electrodes may be,

and under the condition that the terminal is configured to only adopt the second RAT for SL communication, the terminal does not determine the frequency point adopted by the adjacent cell which only provides the anchor carrier for the SL adopting the first RAT as the frequency point with the highest priority.

In case 3 and case 4, in a case where the terminal is configured to perform SL communication using both the first RAT and the second RAT, the terminal satisfies one or more of the following conditions: the terminal has the capability of carrying out SL communication by adopting a first RAT and also carrying out SL communication by adopting a second RAT; the terminal is authorized to conduct SL communications employing the first RAT and the second RAT.

In case 3 and case 4, in case that the terminal is configured to employ only the first RAT for SL communication, the terminal satisfies one or more of the following conditions: the terminal is capable of SL communication using the first RAT, and the terminal is authorized to SL communication using the first RAT.

In case 3 and case 4, in case the terminal is configured to employ only the second RAT for SL communication, the terminal satisfies one or more of the following conditions: the terminal is capable of SL communication using the second RAT, and the terminal is authorized to SL communication using the second RAT.

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

information 7, QoS configuration file (Profile) index corresponding to SLRB configuration provided by the neighboring cell;

information 8, information of whether the neighbor cell has the SLRB configuration of a (enable) hybrid automatic repeat request (HARQ);

information 9, whether the neighbor cell has information of SLRB configuration using Radio Link Control (RLC) Acknowledged Mode (AM);

information 10, SL resource pool index provided by the neighboring cell;

information 11, the lowest CBR index of the SL resource pool provided by the neighboring cell;

information 12, information whether the neighbor cell has a synchronous reference source configuration;

information 13, SL resource configuration provided by the neighboring cell;

information 14, SLRB configuration provided by the neighboring cell;

information 15, configuration of a synchronization reference source provided by the neighborhood.

For the information 7, the terminal may determine, according to the information 7, whether the SLRB configuration provided by the neighboring cell meets Qos requirements of an SL service (e.g., a V2X service).

For the information 8, the terminal may determine whether the neighboring cell provides the HARQ function of the SL according to the information 8.

For the information 9, the terminal may determine whether the neighboring cell adopts the AM mode in the RLC layer of the SL according to the information 9.

For the information 10, the terminal may determine, according to the information 10, an index of the resource pool provided by the neighboring cell, where the size of the index of the resource pool corresponds to the size of the resource pool, and therefore, the terminal may indirectly determine, according to the information 10, the size of the resource pool provided by the neighboring cell.

For the information 11, the terminal may determine, according to the information 11, a resource pool of the lowest CBR in the at least one SL resource pool of the neighboring cell.

For the information 12, the terminal may determine whether the neighbor cell has a synchronization reference source according to the information 12.

For the information 13, the terminal may determine the SL resource configuration of the neighboring cell according to the information 13.

For the information 14, the terminal may determine, according to the information 14, the SLRB configuration provided by the neighboring cell.

For the information 15, the terminal may determine, according to the information 15, a synchronization reference source provided by the neighboring cell.

Based on the first situation, a possible implementation manner is that the SL configuration information of the neighboring cell includes one or more of information 1 to information 15, and in this case, the step 303 may include, when specifically implemented: when the terminal is configured with the service transmitted on the SL, the terminal determines the frequency point adopted by the adjacent cell meeting the service requirement in the adjacent cell as the frequency point with the highest priority according to the SL configuration information of the adjacent cell.

Based on the first situation, another possible implementation manner is that, in a specific implementation manner of step 303, the terminal determines, according to one or more of information 1 to information 6 in SL configuration information of the neighboring cell, a frequency point with the highest priority, and if there are multiple frequency points with the highest priority, then determines, according to one or more of information 7 to information 15, a relative priority of the frequency point with the highest priority, and specifically, when the terminal is configured with a service for transmission on the SL, the terminal determines, according to one or more of information 7 to information 15 in the SL configuration information of the neighboring cell, that a neighboring cell meeting a service requirement in the neighboring cell has a higher relative priority in a frequency point set with the highest priority. The possible implementation mode can determine the priority of the frequency points adopted by the adjacent regions more accurately.

Based on the first case, when the service requirement includes M1(M1 is an integer greater than 0) requirements, the neighboring cell meeting the service requirement may refer to: the SL configuration information of the neighboring cell meets the requirements of N1(N1 is an integer which is greater than 0 and less than or equal to M1) in the requirements of M1. The value of N1 may be preset or predefined or protocol specified or determined from the value of M1. For example, when the SL configuration information of a neighbor cell meets all of the M1 requirements, the neighbor cell meets the service requirements. 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 requirement, and for example, if the SLRB configuration corresponding to the QoS requirement of the service of the terminal adopts RLC AM, the terminal determines that the neighboring cell can provide the SLRB configuration adopting RLC AM according to the SL configuration information of a certain neighboring cell, and then the neighboring cell is considered to be able to meet the service requirement of the terminal.

Optionally, in the second case, the system information may include auxiliary information of a neighboring cell, where the auxiliary information of the neighboring cell includes one or more of the information 7 to the information 15.

Based on the second condition, in step 303, during specific implementation, the terminal determines a frequency point with the highest priority according to one or more of information 1 to information 6 in the SL configuration information of the neighboring cells, and then determines a neighboring cell that does not meet the service requirement in the neighboring cell corresponding to the frequency point with the highest priority according to one or more of information 7 to information 15, and removes a frequency point adopted by the neighboring cell that does not meet the service requirement from the frequency point with the highest priority, or removes the neighboring cell that does not meet the service requirement from a candidate cell list (candidate cell list, i.e., a list composed of cells that meet the S criterion).

Based on the second case, when the service requirement includes M2(M2 is an integer greater than 0) requirements, the neighbor not meeting the service requirement may refer to: the SL configuration information of the neighboring cell does not satisfy the requirements of N2(N2 is an integer greater than 0 and less than or equal to M2) in the requirements of M2. The value of N2 may be preset or predefined or protocol specified or determined from the value of M2. For example, when the SL configuration information of the neighboring cell does not satisfy all the requirements of M2 items of requirements, the neighboring cell does not satisfy the service requirement. For another example, when the SL configuration information of the neighboring cell does not satisfy any of the M2 requirements, the neighboring cell does not satisfy the service requirement, for example, if the SLRB configuration corresponding to the QoS requirement of the service of the terminal adopts RLC AM, when the terminal determines, according to the SL configuration information of a certain neighboring cell, that the neighboring cell cannot provide the SLRB configuration adopting RLC AM, the neighboring cell is considered to not satisfy the service requirement of the terminal.

Example two

The difference between the second embodiment and the first embodiment is mainly that, in the first embodiment, the terminal acquires the SL configuration information of the neighboring cell through the neighboring cell, and in the second embodiment, the terminal acquires the SL configuration information of the neighboring cell through the first cell.

Specifically, referring to fig. 4, the communication method provided in the second embodiment includes:

401. and generating system information, wherein the system information comprises SL configuration information of a neighboring cell, and the SL is a direct connection communication link between two terminals.

In step 401, the system information may be generated for the network device to which the first cell belongs (or the network device providing the first cell), or may be generated for the first cell, which is drawn by taking the first cell generation as an example in fig. 4.

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

For a description of SL configuration information of a neighboring cell, refer to the first embodiment, and are not described herein again.

Optionally, the first cell obtains the SL 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.

The network device to which the first cell belongs may obtain SL configuration information of one or more neighboring cells through an interface between the network device to which the neighboring cell belongs (when both the network devices are enbs, the interface may be an X2 interface, and when both the 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.

402. The first cell transmits system information to the terminal located in the first cell, and accordingly, the terminal receives the system information from the first cell.

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

403. And the terminal determines the priority of the frequency points adopted by the adjacent cell according to the SL configuration information of the adjacent cell.

If the SL configuration information of the neighboring cell includes different information, the implementation in step 403 is also different, which may be specifically referred to in cases 1 to 4 in the first embodiment.

Optionally, after step 403, the method further includes:

404. and the terminal reselects the cell according to the priority of the frequency point adopted by the neighboring cell.

In the method provided in embodiment two, the first cell may send the system information including the SL configuration information of the neighboring cell to the terminal, and in this case, the terminal performing SL communication may directly obtain the SL configuration information of the neighboring cell without camping on the neighboring cell, so that the terminal may conveniently perform cell reselection according to the SL configuration information of the neighboring cell (that is, the above problem 1 may be solved). In addition, the terminal does not need to read the SIB carrying the NR SL configuration and/or the LTE SL configuration, which may avoid increasing the power consumption of the terminal (i.e., may solve the above problem 2).

In addition, the terminal can determine the priority of the frequency point adopted by the neighboring cell according to the SL configuration information of the neighboring cell, so as to perform cell reselection. For example, the terminal may set the priority of the frequency point used by the neighboring cell that meets the SL communication requirement higher, thereby ensuring that the cell reselected by the terminal meets the SL communication requirement of the terminal.

Optionally, when the step 402 is implemented specifically, the step includes: the first cell transmits system information to the terminal in an on-demand manner or a non-on-demand manner. Accordingly, the terminal receives system information from the first cell in an on-demand or off-demand manner.

If the first cell and the terminal send and receive system information in an on-demand manner, step 402 may specifically include: a terminal sends a request message to a first cell, wherein the request message is used for requesting SL configuration information of a neighboring cell; the first cell receives the request message from the terminal, transmits the system information to the terminal according to the request message, and the terminal receives the system information from the first cell. Among them, the system information may be a system information block (e.g., intra-frequency cell reselection SIB (e.g., SIB3), inter-frequency cell reselection SIB (e.g., SIB4), or V2X-SIB, etc.) transmitted in an on-demand manner.

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 system information to the terminal, and the terminal directly receives the system information from the first cell. Wherein the system information may be a system information block (e.g., MIB-SL-V2X, SIB1, etc.) that may not be transmitted in an on-demand manner.

information 10, SL resource pool index provided by the neighboring cell;

information 11, a SL resource pool minimum CBR index provided by the neighboring cell;

information 13, SL resource configuration provided by the neighboring cell;

information 14, SLRB configuration provided by the neighboring cell;

For the information 8, the terminal may determine whether the neighboring cell provides the HARQ function of SL according to the information 8.

For the information 12, the terminal may determine whether the neighboring cell has a synchronization reference source according to the information 12.

EXAMPLE III

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 according to the system information.

Referring to fig. 5, the communication method provided in the third embodiment includes:

501. and the terminal receives system information, wherein the system information comprises SL configuration information of an adjacent cell, and the SL is a direct connection communication link between the two terminals.

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

information 6, information whether the neighbor cell provides only the anchor carrier for the SL adopting the second RAT;

information 7, QoS configuration file indexes corresponding to SLRB configurations provided by the neighboring cells;

information 8, whether the neighbor cell has information of starting the SLRB configuration of the HARQ;

information 9, whether the neighboring cell has information of SLRB configuration adopting RLC AM;

information 10, SL resource pool index provided by the neighboring cell;

information 13, SL resource configuration provided by the neighboring cell;

information 14, SLRB configuration provided by the neighboring cell;

For a description of information included in the SL configuration information of the neighboring cell, reference may be made to embodiment one, which is not described again.

502. And the terminal determines whether the neighbor cell meets the service requirement according to the SL configuration information of the neighbor cell.

In the method provided in the third embodiment, the terminal performing SL communication may obtain SL configuration information of the neighboring cell, and determine whether the neighboring cell meets the service requirement according to the SL configuration information of the neighboring cell, and in this case, the terminal may reselect to the neighboring cell meeting the service requirement, thereby preventing subsequent connection establishment or connection recovery, avoiding an increase in power consumption of the terminal, and also improving service transmission performance and continuity (i.e., solving the above problem 3).

Optionally, when the step 501 is implemented specifically, it may be implemented in the following one or two ways.

And the first mode is that system information is generated and sent to the terminal in a non-on-demand mode, and the terminal receives the system information from the adjacent region in the non-on-demand mode.

In a first manner, the system information may be generated for a network device to which the neighboring cell belongs (or a network device that provides the neighboring cell), or may be generated for the neighboring cell.

Mode one, when implemented specifically, can include: the neighbor cell directly sends system information to the terminal, and the terminal directly receives the system information from the neighbor cell. And when the non-on-demand mode is a broadcasting mode, the adjacent cell broadcasts the system information, and the terminal receives the system information broadcasted by the adjacent cell.

In mode one, the system information may be a system information block (e.g., MIB-SL-V2X, SIB1, etc.) that may not be transmitted in an on-demand manner.

And in the second mode, 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.

In a second mode, 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.

Wherein, the second mode includes when specifically realizing: the first cell transmits system information to the terminal in an on-demand manner or a non-on-demand manner. Accordingly, the terminal receives system information from the first cell in an on-demand or off-demand manner.

If the first cell and the terminal send and receive system information in an on-demand manner, step 501 specifically includes: a terminal sends a request message to a first cell, wherein the request message is used for requesting SL configuration information of a neighboring cell; the first cell receives the request message from the terminal and transmits system information to the terminal according to the request message, and the terminal receives the system information from the first cell. Among them, the system information may be a system information block (e.g., intra-frequency cell reselection SIB (e.g., SIB3), inter-frequency cell reselection SIB (e.g., SIB4), or V2X-SIB, etc.) transmitted in an on-demand manner.

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 system information, and the terminal directly receives the system information from the first cell. Wherein the system information may be a system information block (e.g., MIB-SL-V2X, SIB1, etc.) that may not be transmitted in an on-demand manner.

In the second manner, optionally, the first cell obtains the SL 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.

Optionally, after step 502, the method further comprises any one of the following methods.

Method 1, under the condition that the SL configuration information of the adjacent cell does not meet the service requirement, the terminal does not preferentially reselect to the adjacent cell.

Method 2, under the condition that the SL configuration information of the neighboring cell does not meet the service requirement, the terminal avoids reselecting to the neighboring cell, specifically, the terminal can add the neighboring cell that does not meet the service requirement to a blacklist or not serve as a candidate cell.

The method 3, the terminal removes (for example, moves to a temp remove list) the neighbor cell whose SL configuration information does not meet the service requirement from the first candidate cell list (candidate list) to obtain a second candidate cell list; if the number of the cells in the second candidate cell list is larger than 0, the terminal reselects the cells in the second candidate cell list; if the number of the cells in the second candidate cell list is equal to 0, the terminal adds the removed cells into the second candidate cell list (i.e. all the neighboring cells in the temp remove list are moved back to the candidate list), and performs cell reselection in the second candidate cell list after the cells are added.

The method 4, the terminal adds the neighbor cell whose SL configuration information in the first candidate cell list meets the service requirement into the second candidate cell list; if the number of the cells in the second candidate cell list is larger than 0, the terminal reselects the cells in the second candidate cell list; and if the number of the cells in the second candidate cell list is equal to 0, the terminal reselects the cells in the first candidate cell list.

In the method 1 to method 3, optionally, when the service requirement includes M2(M2 is an integer greater than 0) requirements, the neighboring cell not meeting the service requirement may refer to: the SL configuration information of the neighboring cell does not satisfy the requirements of N2(N2 is an integer greater than 0 and less than or equal to M2) in the requirements of M2. The value of N2 may be preset or predefined or protocol specified or determined from the value of M2. For example, when the SL configuration information of the neighboring cell does not satisfy all the requirements of M2 items of requirements, the neighboring cell does not satisfy the service requirement. For another example, when the SL configuration information of the neighboring cell does not satisfy any of the M2 requirements, the neighboring cell does not satisfy the service requirement, for example, if the SLRB configuration corresponding to the QoS requirement of the service of the terminal adopts RLC AM, when the terminal determines, according to the SL configuration information of a certain neighboring cell, that the neighboring cell cannot provide the SLRB configuration adopting RLC AM, the neighboring cell is considered to not satisfy the service requirement of the terminal. For another example, if the terminal is configured to perform SL communication using the first RAT, but the neighboring cell only provides SL resource configuration using the second RAT, the neighboring cell is considered not to meet the service requirement 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 satisfy the service requirement of the terminal.

In method 4, when the service requirement includes M1(M1 is an integer greater than 0) requirements, the service requirement being met by the neighbor cell may be: the SL configuration information of the neighboring cell meets the requirements of N1(N1 is an integer which is greater than 0 and less than or equal to M1) in the requirements of M1. The value of N1 may be preset or predefined or protocol specified or determined from the value of M1. For example, when the SL configuration information of a neighbor cell meets all of the M1 requirements, the neighbor cell meets the service requirements. 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 requirement, and for example, if the SLRB configuration corresponding to the QoS requirement of the service of the terminal adopts RLC AM, the terminal determines that the neighboring cell can provide the SLRB configuration adopting RLC AM according to the SL configuration information of a certain neighboring cell, and then the neighboring cell is considered to be able to meet the service requirement of the terminal. For another example, if the terminal is configured to perform SL communication using the first RAT and also perform SL communication using the second RAT, and the neighboring cell provides the SL resource configuration using the first RAT and also provides the SL resource configuration using the second RAT, the neighboring cell is considered to meet the service requirement of the terminal. For another example, if the terminal has SL communication capability, and the terminal is configured to perform SL communication, and the neighboring cell also provides SL resource configuration, it is considered that the neighboring cell satisfies the service requirement of the terminal.

It should be noted that, when different information in the SL configuration information of the neighboring cell is used as a basis for cell reselection of the terminal, the terminal may perform different methods in the above-mentioned methods 1 to 4. For example, when one or more of information 1 to information 6 in the SL configuration information of the neighboring cell is used as a basis for terminal cell reselection, the terminal may perform method 1 or method 2 described above. For another example, when one or more of the information 7 to the information 12 in the SL configuration information of the neighboring cell are used as a basis for terminal cell reselection, the terminal may perform the method 3 or the method 4. For another example, when the information 13 in the SL configuration information of the neighboring cell is used as a basis for cell reselection, the terminal may perform the method 1 or the method 2. For another example, when the information 14 or the information 15 in the SL configuration information of the neighboring cell is used as a basis for cell reselection, the terminal may perform the method 3 or the method 4.

That is, the information in the SL configuration information may belong to different information groups, for example, information 1 to information 6 belong to one information group, information 7 to information 12 belong to another information group, and different information groups correspond to different methods. For example, if the candidate cells are divided into two groups, where the first information group uses method 1 and the second information group uses method 3, the candidate cells may be first screened according to the first information group using method 1, and then the cell set after the first screening may be second screened according to the second information group using method 3. And for the cell set obtained after the second screening, cell reselection is carried out according to the prior art.

Example four

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 requirement according to part of information in the system information, and then determines the priority of the frequency point adopted by each neighboring cell in the determined neighboring cells.

Referring to fig. 6, the communication method according to the fourth embodiment includes:

601. and the terminal receives system information, wherein the system information comprises SL configuration information of an adjacent cell, and the SL is a direct connection communication link between the two terminals.

If there are multiple neighboring cells, the terminal may receive one piece of system information, where the system information may include SL configuration information of multiple neighboring cells, or the terminal may receive multiple pieces of system information, where one piece of system information includes SL configuration information of one neighboring cell.

information 2, information whether the neighboring cell only provides anchor carriers;

602. And the terminal determines whether the neighbor cell meets the service requirement according to the SL configuration information of the neighbor cell.

In the method provided in the fourth embodiment, a terminal performing SL communication may obtain SL configuration information of an adjacent cell, and determine whether the adjacent cell meets a service requirement according to the SL configuration information of the adjacent cell, and in this case, the terminal may reselect to the adjacent cell meeting the service requirement, thereby preventing subsequent connection establishment or connection recovery, avoiding an increase in power consumption of the terminal, and also improving service transmission performance and continuity (i.e., solving problem 3).

The specific implementation of step 601 may refer to the specific implementation of step 501, which is not described again.

Optionally, after step 602, the method may further include any one of methods 1 to 4 in the third embodiment, which is not described again.

Optionally, the system information further includes auxiliary information of a neighboring cell, where the auxiliary information of the neighboring cell includes one or more of the following information:

information 8, whether the neighbor cell has information of starting SLRB configuration of HARQ;

information 10, SL resource pool index provided by the neighboring cell;

information 13, SL resource configuration provided by the neighboring cell;

information 14, SLRB configuration provided by the neighboring cell;

Based on the auxiliary information of the neighboring cells, in a first possible implementation manner, the terminal may determine, according to one or more pieces of information from information 1 to information 6, the neighboring cells (marked as target neighboring cells) that do not meet the service requirements in the candidate cell list, and determine, according to the auxiliary information of the neighboring cells, the priorities of the frequency points that are used by the neighboring cells other than the target neighboring cells in the neighboring cells, for example, determine, according to the auxiliary information of the neighboring cells, the frequency point that is used by the neighboring cells that meet the service requirements in the neighboring cells other than the target neighboring cells in the neighboring cells, as the frequency point with the highest priority.

For example, the terminal may determine, according to the auxiliary information of the neighboring cells, a frequency point that is used by a neighboring cell that satisfies the service requirement most in neighboring cells other than the target neighboring cell in the neighboring cells as a frequency point with the highest priority. For example, if there are 8 neighboring cells, which are recorded as neighboring cell 1 to neighboring cell 8, the terminal determines that the neighboring cells 5 to 8 do not satisfy the service requirements according to the SL configuration information, at this time, the terminal determines the priorities of the frequency points used by the neighboring cells 1 to 4 according to the auxiliary information of the neighboring cells, and if the auxiliary information of the neighboring cells 4 satisfies the most service requirements (for example, the service requirements of the terminal include 4 requirements, the auxiliary information of the neighboring cells 4 can satisfy 4 of the 4 requirements, other neighboring cells can only satisfy 2 of the 4 requirements, and at this time, the auxiliary information of the neighboring cells 4 satisfies the most service requirements), the frequency point used by the neighboring cells 4 is determined as the frequency point with the highest priority.

In a second possible implementation manner, the terminal may determine, according to one or more of the information 1 to the information 6, a frequency point of a neighboring cell (denoted as a target neighboring cell) that satisfies a service requirement in the candidate cell list, and determine, according to auxiliary information of the neighboring cell, a priority of a frequency point that is used by the neighboring cell in the target neighboring cell, for example, determine, as a frequency point with a highest priority, a frequency point that is used by a neighboring cell in which the auxiliary information in the target neighboring cell satisfies the most service requirement.

For example, if there are 8 neighboring cells, which are recorded as neighboring cell 1 to neighboring cell 8, the terminal determines that the neighboring cells 5 to 8 satisfy the service requirements according to the SL configuration information, and at this time, if the auxiliary information of the neighboring cell 5 satisfies the largest service requirements, the frequency point adopted by the neighboring cell 5 is determined as the frequency point with the highest priority.

In the first possible implementation manner and the second possible implementation manner, for the description about meeting and not meeting the service requirement, reference may be made to embodiment one, and details are not described again.

In the first possible implementation manner and the second possible implementation manner, after determining the priority of the frequency point used by the neighboring cell, cell reselection may be performed according to the priority of the frequency point used by the neighboring cell, which may specifically refer to the prior art and is not described again.

The methods provided in the first to fourth embodiments of the present application may be applied to the V2X communication scenario and may also be applied to other SL communication scenarios, where information related to V2X in the present application may be replaced by corresponding information in other SL communication scenarios, for example, MIB-SL-V2X may be replaced by MIB in other SL communication scenarios.

In addition, the SL configuration information of the neighboring cell in the embodiment of the present application may also be carried in other information than the system information, for example, in the dedicated signaling, the present application is only exemplified by the system information, but this should not be considered as limiting the present application.

The above-mentioned scheme of the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element, for example, the network device and the terminal, includes corresponding hardware structures and/or software modules for performing each function in order to realize the functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the network device and the terminal may be divided into the functional units according to the above method examples, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

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

Among them, when the communication device 70 is used to illustrate the terminal in the above embodiments, the communication device 70 may perform the actions shown in one or more of the following embodiments 1, 2, and 3. When the communication apparatus 70 is used to illustrate the network device in the above embodiments, and the network device provides a neighborhood, the communication apparatus 70 may perform the actions shown in embodiment 4 and/or embodiment 6 below. When the communication apparatus 70 is used to illustrate the network device in the above embodiments, and the network device provides the first cell, the communication apparatus 70 may perform the actions shown in embodiment 5 and/or embodiment 7 below.

In embodiment 1, the communication unit is configured to receive system information from a neighboring cell of a 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 another communication device; and the processing unit is used for determining the priority of the frequency point adopted by the adjacent cell according to the sideline link configuration information of the adjacent cell.

With reference to embodiment 1, in a possible implementation manner, the communication unit is specifically configured to receive the system information directly from the neighboring cell.

With reference to embodiment 1, in a possible implementation manner, the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the adjacent cell provides information of side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the first radio access technology; the neighbor cell provides information of only an anchor carrier for a sidelink employing the second radio access technology.

In embodiment 2, the communication unit is configured to receive system information from a first cell, where the system information includes sidelink configuration information of a neighboring cell of 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 adjacent cell provides information of side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the first radio access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the second radio access technology; and the processing unit is used for determining the priority of the frequency point adopted by the adjacent cell according to the sideline link configuration information of the adjacent cell.

With reference to 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.

With reference to embodiment 2, in a possible implementation manner, the communication unit is specifically configured 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; receiving the system information from the first cell.

With reference to embodiment 2, in a possible implementation manner, the communication unit is specifically configured to receive the system information directly from the first cell.

With reference to embodiment 2, 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.

With reference to embodiment 1 or embodiment 2, in a possible implementation manner, the sidelink resource configuration includes an intra-carrier sidelink resource configuration and/or an inter-carrier sidelink resource configuration.

With reference to embodiment 1 or embodiment 2, in a possible implementation manner, the configuration of the uplink resources inside the carrier of the neighboring cell refers to the configuration of the uplink resources of the frequency point that is the same as the frequency point used by the neighboring cell, or the configuration of the uplink resources on the carrier that is the same as the carrier used by the neighboring cell; the inter-carrier side link resource allocation of the neighboring cell refers to side link resource allocation of a frequency point different from a frequency point adopted by the neighboring cell, or side link resource allocation on a neighboring frequency of the frequency point adopted by the neighboring cell, or side link resource allocation on a carrier different from a carrier adopted by the neighboring cell.

With reference to embodiment 1 or embodiment 2, in a possible implementation manner, the processing unit is specifically configured to: and under the condition that the adjacent cell provides the side link resource configuration according to the side link configuration information of the adjacent cell, determining the frequency point adopted by the adjacent cell as the frequency point with the highest priority.

With reference to embodiment 1 or embodiment 2, in one possible implementation, the communication device satisfies one or more of the following conditions: the communication device is capable of sidelink communication, the communication device is configured for sidelink communication, and the communication device is authorized for sidelink communication.

With reference to embodiment 1 or embodiment 2, in a possible implementation manner, the processing unit is specifically configured to: determining a frequency point adopted by the adjacent cell, which provides the configuration of the sidelink resources adopting the first radio access technology and also provides the configuration of the sidelink resources adopting the second radio access technology, as a frequency point with the highest priority under the condition that the communication device is configured to adopt the first radio access technology for the sidelink communication and adopt the second radio access technology for the sidelink communication; or, when the communication apparatus is configured to perform sidelink communication only by using the first radio access technology, determining a frequency point used by the neighboring cell providing the sidelink resource configuration using the first radio access technology as a frequency point with the highest priority; or, when the communication apparatus is configured to perform sidelink communication only by using the second radio access technology, determining the frequency point used by the neighboring cell configured by using the sidelink resource of the second radio access technology as the frequency point with the highest priority.

With reference to embodiment 1 or embodiment 2, in a possible implementation manner, in a case where the communication apparatus is configured to perform the sidelink communication using both the first radio access technology and the second radio access technology, the communication apparatus satisfies one or more of the following conditions: the communication device has the capability of performing sidelink communication by using the first radio access technology and performing the sidelink communication by using the second radio access technology; the communication device is authorized for sidelink communications employing the first radio access technology and the second radio access technology; alternatively, in a case where the communication apparatus is configured to perform side link communication using only the first radio access technology, the communication apparatus satisfies one or more of the following conditions: the communication device is capable of sidelink communications employing the first radio access technology, the communication device being authorized to sidelink communications employing the first radio access technology; alternatively, in a case where the communication apparatus is configured to perform sidelink communication using only the second radio access technology, the communication apparatus satisfies one or more of the following conditions: the communication device is capable of sidelink communications employing the second radio access technology, the communication device being authorized to sidelink communications employing the second radio access technology.

With reference to embodiment 1 or embodiment 2, in a possible implementation manner, 1 bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and/or 1 bit is used to indicate whether the neighboring cell only provides an anchor carrier.

With reference to embodiment 1 or embodiment 2, in a possible implementation manner, 2 bits are used to indicate whether the neighboring cell provides the sidelink resource configuration using the first radio access technology and/or the second radio access technology.

With reference to embodiment 1 or embodiment 2, in a possible implementation manner, the sidelink resource configuration includes a sidelink transmission resource configuration, and/or a sidelink reception resource configuration.

With reference to embodiment 1 or embodiment 2, 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, and does not provide sidelink resource configuration through a dedicated signaling.

With reference to embodiment 1 or embodiment 2, in a possible implementation manner, the neighboring cell does not provide the sidelink resource configuration, which means that the neighboring cell does not provide the sidelink resource configuration through the system information, but provides the sidelink resource configuration through a dedicated signaling.

With reference to embodiment 1 or embodiment 2, in a possible implementation manner, the sidelink configuration information of the neighboring cell includes one or more of the following information: configuring a corresponding QoS configuration file index by the side-link radio bearer provided by the adjacent cell; whether the adjacent cell has the information of the side-link radio bearer configuration for starting the HARQ or not; whether the adjacent cell has the information of side-link radio bearer configuration adopting RLC AM; a sidelink resource pool index provided by the adjacent cell; the lowest CBR index of a side link resource pool provided by the adjacent cell; whether the neighbor cell has the information of the configuration of the synchronous reference source; allocating side link resources provided by the neighboring cell; configuring a side-link radio bearer provided by the neighboring cell; and configuring a synchronous reference source provided by the adjacent cell.

With reference to embodiment 1 or embodiment 2, in a possible implementation manner, the processing unit is specifically configured to: when the communication device is configured with service transmission on a sidelink, determining a frequency point adopted by an adjacent cell meeting service requirements in the adjacent cells as a frequency point with the highest priority according to the sidelink configuration information of the adjacent cells.

In embodiment 3, the communication unit is configured to receive system information, where 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 adjacent cell provides information of side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighbor cell provides information of side link resource allocation adopting a second wireless access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the first radio access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the second radio access technology; configuring a corresponding QoS configuration file index for a side-link radio bearer provided by the adjacent cell; whether the adjacent cell has the information of the side-link radio bearer configuration for starting the HARQ or not; whether the adjacent cell has the information of side-link radio bearer configuration adopting RLC AM; a sidelink resource pool index provided by the adjacent cell; the lowest CBR index of a side link resource pool provided by the adjacent cell; whether the neighbor cell has the information of the configuration of the synchronous reference source; allocating side link resources provided by the neighboring cell; configuring a side-link radio bearer provided by the neighboring cell; configuring a synchronous reference source provided by the neighboring cell; and the processing unit is used for determining whether the neighboring cell meets the service requirement according to the sidelink configuration information of the neighboring cell of the first cell.

With reference to embodiment 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.

With reference to embodiment 3, in a possible implementation manner, the communication unit is specifically configured to receive the system information directly from the neighboring cell.

With reference to embodiment 3, in a possible implementation manner, the communication unit is specifically configured to receive system information from the first cell.

With reference to embodiment 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.

With reference to embodiment 3, in a possible implementation manner, the communication unit is specifically configured 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.

With reference to embodiment 3, in a possible implementation manner, the communication unit is specifically configured to receive the system information directly from the first cell.

With reference to embodiment 3, 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.

With reference to embodiment 3, in a possible implementation manner, the sidelink resource configuration includes an intra-carrier sidelink resource configuration and/or an inter-carrier sidelink resource configuration.

With reference to embodiment 3, in a possible implementation manner, the uplink resource configuration inside the carrier of the neighboring cell refers to the uplink resource configuration of a frequency point that is the same as the frequency point used by the neighboring cell, or the uplink resource configuration on a carrier that is the same as the carrier used by the neighboring cell; the inter-carrier side link resource allocation of the neighboring cell refers to side link resource allocation of a frequency point different from a frequency point adopted by the neighboring cell, or side link resource allocation on a neighboring frequency of the frequency point adopted by the neighboring cell, or side link resource allocation on a carrier different from a carrier adopted by the neighboring cell.

With reference to embodiment 3, in a possible implementation manner, 1 bit is used to indicate whether the neighboring cell provides the sidelink resource configuration, and/or 1 bit is used to indicate whether the neighboring cell only provides the anchor carrier.

With reference to embodiment 3, in a possible implementation manner, 2 bits are used to indicate whether the neighboring cell provides the sidelink resource configuration using the first radio access technology and/or the second radio access technology.

With reference to embodiment 3, in a possible implementation manner, the sidelink resource configuration includes a sidelink transmission resource configuration, and/or a sidelink reception resource configuration.

With reference to embodiment 3, 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, and does not provide sidelink resource configuration through a dedicated signaling.

With reference to embodiment 3, in a possible implementation manner, the neighboring cell does not provide the sidelink resource configuration, which means that the neighboring cell does not provide the sidelink resource configuration through the system information, but provides the sidelink resource configuration through a dedicated signaling.

With reference to embodiment 3, in a possible implementation manner, the processing unit is specifically configured to: and under the condition that the sidelink configuration information of the adjacent cell does not meet the service requirement, the adjacent cell is not preferentially reselected.

With reference to embodiment 3, in a possible implementation manner, the processing unit is specifically configured to: and under the condition that the sidelink configuration information of the adjacent cell does not meet the service requirement, avoiding reselecting to the adjacent cell.

With reference to embodiment 3, in a possible implementation manner, the processing unit is specifically configured to: removing the neighboring cell of which the side link configuration information does not meet the service requirement from the first candidate cell list to obtain a second candidate cell list; if the number of the cells in the second candidate cell list is larger than 0, performing cell reselection in the second candidate cell list; and if the number of the cells in the second candidate cell list is equal to 0, adding the removed cells into the second candidate cell list, and performing cell reselection in the second candidate cell list after the cells are added.

With reference to embodiment 3, in a possible implementation manner, the processing unit is specifically configured to: adding the adjacent cell of which the sidelink configuration information in the first candidate cell list meets the service requirement into a second candidate cell list; if the number of the cells in the second candidate cell list is larger than 0, performing cell reselection in the second candidate cell list; and if the number of the cells in the second candidate cell list is equal to 0, performing cell reselection in the first candidate cell list.

In embodiment 4, a communication unit and a processing unit; the processing unit is configured to generate (e.g., on the neighboring cell) system information, where the system information includes sidelink configuration information of the neighboring cell, and the sidelink is a direct communication link between two terminals; the communication unit is configured to send system information to a terminal in the first cell in a non-on-demand manner on the neighboring cell, where 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.

With reference to embodiment 4, in a possible implementation manner, the communication unit is specifically configured to directly send the system information to the terminal on the neighboring cell.

With reference to embodiment 4, in a possible implementation manner, the sidelink configuration information of the neighboring cell includes one or more of the following information: whether the adjacent cell provides information of side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the first radio access technology; the neighbor cell provides information of only an anchor carrier for a sidelink employing the second radio access technology.

In embodiment 5, a communication unit and a processing unit; the processing unit is configured to generate (e.g., on the first cell) system information, where the system information includes 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 adjacent cell provides information of side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the first radio access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the second radio access technology; the communication unit is configured to send the system information to a terminal in the first cell on the first cell, where 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 used by the neighboring cell.

With reference to embodiment 5, in a possible implementation manner, the communication unit is specifically configured to send the system information to the terminal in an on-demand manner or a non-on-demand manner in the first cell.

With reference to embodiment 5, in a possible implementation manner, the communication unit is specifically configured to receive, on the first cell, a request message from the terminal, where the request message is used to request sidelink configuration information of the neighboring cell, and send, on the first cell, the system information to the terminal according to the request message.

With reference to embodiment 5, in a possible implementation manner, the communication unit is specifically configured to send the system information directly to the terminal on the first cell.

With reference to embodiment 5, 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.

With reference to embodiment 4 or embodiment 5, in a possible implementation manner, the sidelink resource configuration includes an intra-carrier sidelink resource configuration and/or an inter-carrier sidelink resource configuration.

With reference to embodiment 4 or embodiment 5, in a possible implementation manner, the configuration of the uplink resources inside the carrier of the neighboring cell refers to the configuration of the uplink resources of the frequency point that is the same as the frequency point used by the neighboring cell, or the configuration of the uplink resources on the carrier that is the same as the carrier used by the neighboring cell; the inter-carrier side link resource allocation of the neighboring cell refers to side link resource allocation of a frequency point different from a frequency point adopted by the neighboring cell, or side link resource allocation on a neighboring frequency of the frequency point adopted by the neighboring cell, or side link resource allocation on a carrier different from a carrier adopted by the neighboring cell.

With reference to embodiment 4 or embodiment 5, in a possible implementation manner, 1 bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and/or 1 bit is used to indicate whether the neighboring cell only provides an anchor carrier.

With reference to embodiment 4 or embodiment 5, in a possible implementation manner, 2 bits are used to indicate whether the neighboring cell provides the sidelink resource configuration using the first radio access technology and/or the second radio access technology.

With reference to embodiment 4 or embodiment 5, in a possible implementation manner, the sidelink resource configuration includes a sidelink transmission resource configuration, and/or a sidelink reception resource configuration.

With reference to embodiment 4 or embodiment 5, 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, and does not provide sidelink resource configuration through a dedicated signaling.

With reference to embodiment 4 or embodiment 5, 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.

With reference to embodiment 4 or embodiment 5, in a possible implementation manner, the sidelink configuration information of the neighboring cell includes one or more of the following information: configuring a corresponding QoS configuration file index by the side-link radio bearer provided by the adjacent cell; whether the adjacent cell has the information of the side-link radio bearer configuration for starting the HARQ or not; whether the adjacent cell has the information of side-link radio bearer configuration adopting RLC AM; a sidelink resource pool index provided by the adjacent cell; the lowest CBR index of a side link resource pool provided by the adjacent cell; whether the neighbor cell has the information of the configuration of the synchronous reference source; allocating side link resources provided by the neighboring cell; configuring a side-link radio bearer provided by the neighboring cell; and configuring a synchronous reference source provided by the adjacent cell.

In embodiment 6, a processing unit and a communication unit; the processing unit is configured to generate (e.g., on the neighboring cell) system information, where the system information includes sidelink configuration information of the 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 adjacent cell provides information of side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the first radio access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the second radio access technology; configuring a corresponding QoS configuration file index for a side-link radio bearer provided by the adjacent cell; whether the adjacent cell has the information of the side-link radio bearer configuration for starting the HARQ or not; whether the adjacent cell has the information of side-link radio bearer configuration adopting RLC AM; a sidelink resource pool index provided by the adjacent cell; the lowest CBR index of a side link resource pool provided by the adjacent cell; whether the neighbor cell has the information of the configuration of the synchronous reference source; allocating side link resources provided by the neighboring cell; configuring a side-link radio bearer provided by the neighboring cell; configuring a synchronous reference source provided by the neighboring cell; the side link is a direct communication link between two terminals; the communication unit is configured to send system information to a terminal in the first cell in a non-on-demand manner on the neighboring cell, where the sidelink configuration information of the neighboring cell in the system information is used by the terminal to determine whether the neighboring cell meets a service requirement.

With reference to embodiment 6, in a possible implementation manner, the communication unit is specifically configured to directly send the system information to the terminal.

In embodiment 7, a processing unit and a communication unit; the processing unit is configured to generate (e.g., on the first cell) system information, where 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 adjacent cell provides information of side link resource configuration or not; whether the neighbor cell only provides information of anchor carriers; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the first radio access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the second radio access technology; configuring a corresponding QoS configuration file index by the side-link radio bearer provided by the adjacent cell; whether the adjacent cell has the information of the side-link radio bearer configuration for starting the HARQ or not; whether the adjacent cell has the information of side-link radio bearer configuration adopting RLC AM; a sidelink resource pool index provided by the adjacent cell; the lowest CBR index of a side link resource pool provided by the adjacent cell; whether the neighbor cell has the information of the configuration of the synchronous reference source; allocating side link resources provided by the neighboring cell; configuring a side-link radio bearer provided by the neighboring cell; configuring a synchronous reference source provided by the neighboring cell; the side link is a direct communication link between two terminals; the communication unit is configured to send the system information to a terminal located in the first cell on the first cell, where the sidelink configuration information of the neighboring cell in the system information is used by the terminal to determine whether the neighboring cell meets a service requirement.

With reference to embodiment 7, in a possible implementation manner, the communication unit is specifically configured to send the system information to the terminal in an on-demand manner or a non-on-demand manner in the first cell.

With reference to embodiment 7, in a possible implementation manner, the communication unit is specifically configured to receive, on the first cell, a request message from the terminal, where the request message is used to request sidelink configuration information of the neighboring cell, and send, on the first cell, the system information to the terminal according to the request message.

With reference to embodiment 7, in a possible implementation manner, the communication unit is specifically configured to send the system information directly to the terminal on the first cell.

With reference to embodiment 7, 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.

With reference to embodiment 6 or embodiment 7, in a possible implementation manner, the sidelink resource configuration includes an intra-carrier sidelink resource configuration and/or an inter-carrier sidelink resource configuration.

With reference to embodiment 6 or embodiment 7, in a possible implementation manner, the configuration of the uplink resources inside the carrier of the neighboring cell refers to the configuration of the uplink resources of the frequency point that is the same as the frequency point used by the neighboring cell, or the configuration of the uplink resources on the carrier that is the same as the carrier used by the neighboring cell; the inter-carrier side link resource allocation of the neighboring cell refers to side link resource allocation of a frequency point different from a frequency point adopted by the neighboring cell, or side link resource allocation on a neighboring frequency of the frequency point adopted by the neighboring cell, or side link resource allocation on a carrier different from a carrier adopted by the neighboring cell.

With reference to embodiment 6 or embodiment 7, in a possible implementation manner, 1 bit is used to indicate whether the neighboring cell provides sidelink resource configuration, and/or 1 bit is used to indicate whether the neighboring cell only provides an anchor carrier.

With reference to embodiment 6 or embodiment 7, in a possible implementation manner, 2 bits are used to indicate whether the neighboring cell provides the sidelink resource configuration using the first radio access technology and/or the second radio access technology.

With reference to embodiment 6 or embodiment 7, in a possible implementation manner, the sidelink resource configuration includes a sidelink transmission resource configuration, and/or a sidelink reception resource configuration.

With reference to embodiment 6 or embodiment 7, 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, and does not provide sidelink resource configuration through a dedicated signaling.

With reference to embodiment 6 or embodiment 7, in a possible implementation manner, the neighboring cell does not provide sidelink resource configuration, which indicates that the neighboring cell does not provide sidelink resource configuration through system information, but provides sidelink resource configuration through dedicated signaling.

The communication device 70 may be a single device or a chip in a device.

Where the communication device 70 is a device, the processing unit 701 may be a processor or a controller, and the communication unit 702 may be a communication interface, a transceiver circuit, a transceiver device, etc. The communication interface is a generic term, and may include one or more interfaces. The storage unit 703 may be a memory. When the communication device 70 is a chip in a device, the processing unit 701 may be a processor or a controller, and the communication unit 702 may be an input interface and/or an output interface, a pin or a circuit, etc. The memory unit 703 may be a memory unit within the chip (e.g., a register, a cache memory, etc.), or may be a memory unit located outside the chip within the device (e.g., a read only memory, a random access memory, etc.).

The communication unit may also be referred to as a transceiver unit. The antenna and the control circuit having a transmitting and receiving function in the communication apparatus 70 can be regarded as the communication unit 702 of the communication apparatus 70, and the processor having a processing function can be regarded as the processing unit 701 of the communication apparatus 70. Alternatively, a device in the communication unit 702 for implementing the receiving function may be regarded as a receiving unit, where the receiving unit is configured to perform the receiving step in the embodiment of the present application, and the receiving unit may be a receiver, a receiving circuit, and the like. The device for realizing the transmission function in the communication unit 702 may be regarded as a transmission unit for performing the steps of transmission in the embodiment of the present application, and the transmission unit may be a transmitter, a transmission circuit, or the like.

The integrated unit in fig. 7, if implemented in the form of a software functional module and sold or used as a separate product, may be stored in a computer-readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially implemented or make a contribution to the prior art, or all or part of the technical solutions may be implemented in the form of a software product stored in a storage medium, and including several instructions for causing a computer device (which may be a personal computer, a server, a network device, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. A storage medium storing a computer software product comprising: various media capable of storing program codes, such as a usb disk, a removable hard disk, a read-only memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The elements in fig. 7 may also be referred to as modules, for example, the processing elements may be referred to as processing modules.

The embodiment of the present application further provides a schematic diagram of a hardware structure of a communication device (denoted as the communication device 80), and referring to fig. 8 or fig. 9, the communication device 80 includes a processor 801 and optionally further includes a memory 802 connected to the processor 801.

The processor 801 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs in accordance with the present disclosure. 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. A processor herein may refer to one or more devices, circuits, or processing cores that process data, such as computer program instructions.

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, an EEPROM (electrically erasable programmable read-only memory), a CD-ROM (compact disk read-only memory) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, and is not limited in this respect. The memory 802 may be separate or integrated with the processor 801. The memory 802 may have computer program code embodied therein. The processor 801 is configured to execute the computer program code stored in the memory 802, thereby implementing the methods provided by the embodiments of the present application.

In a first possible implementation, referring to fig. 8, the communication device 80 further comprises a transceiver 803. The processor 801, memory 802, and transceiver 803 are connected by a bus. The transceiver 803 is used to communicate with other devices or communication networks. Optionally, the transceiver 803 may include a transmitter and a receiver. The means in the transceiver 803 for performing the receiving function may be regarded as a receiver, and the receiver is configured to perform the receiving step in the embodiments of the present application. The means for implementing the transmitting function in the transceiver 803 may be regarded as a transmitter for performing the steps of transmitting in the embodiments of the present application.

Based on the first possible implementation manner, the schematic structure diagram shown in fig. 8 may be used to illustrate the structure of the network device or the terminal involved in the foregoing embodiments. The network device may provide the first cell and/or the neighboring cell.

When the schematic structure diagram shown in fig. 8 is used to illustrate the structure of the network device in the foregoing embodiment, the processor 801 is configured to control and manage the actions of the network device, for example, the processor 801 is configured to support the network device to perform actions performed by the network device in 301 and 302 in fig. 3 through a neighboring cell and/or perform actions performed by the network device in 401 and 402 in fig. 4 through a first cell, and/or in other processes described in this embodiment. The processor 801 may communicate with other network entities, e.g., the terminal shown in fig. 3, via the transceiver 803. The memory 802 is used to store program codes and data for the network devices.

When the schematic structure shown in fig. 8 is used to illustrate the structure of the terminal in the above embodiment, the processor 801 is configured to control and manage actions of the terminal, for example, the processor 801 is configured to support the terminal to execute actions performed by the terminal in 302 to 304 in fig. 3, 402 to 404 in fig. 4, 501 and 502 in fig. 5, 601 and 602 in fig. 6, and/or other processes described in this embodiment. The processor 801 may communicate with other network entities, e.g., with the neighborhood provided by the network device shown in fig. 3, through the transceiver 803. The memory 802 is used for storing program codes and data of the terminal.

In a second possible implementation, the processor 801 comprises logic circuits and an input interface and/or an output interface. Wherein the output interface is used for executing the sent action in the corresponding method, and the input interface is used for executing the received action in the corresponding method.

Based on the second possible implementation manner, referring to fig. 9, the schematic structure diagram shown in fig. 9 may be used to illustrate the structure of the network device or the terminal involved in the foregoing embodiments. The network device may provide the first cell and/or the neighboring cell.

When the schematic structure diagram shown in fig. 9 is used to illustrate the structure of the network device in the foregoing embodiment, the processor 801 is configured to control and manage the actions of the network device, for example, the processor 801 is configured to support the network device to perform actions performed by the network device in 301 and 302 in fig. 3 through a neighboring cell and/or perform actions performed by the network device in 401 and 402 in fig. 4 through a first cell, and/or in other processes described in this embodiment. The processor 801 may communicate with other network entities, e.g. with the terminal shown in fig. 3, via an input interface and/or an output interface. The memory 802 is used to store program codes and data for the network devices.

When the schematic structure shown in fig. 9 is used to illustrate the structure of the terminal in the above embodiments, the processor 801 is configured to control and manage the actions of the terminal, for example, the processor 801 is configured to support the terminal to execute the actions performed by the terminal in 302 to 304 in fig. 3, 402 to 404 in fig. 4, 501 and 502 in fig. 5, 601 and 602 in fig. 6, and/or other processes described in this embodiment. The processor 801 may communicate with other network entities, e.g. with neighborhoods provided by the network device shown in fig. 3, via the input interface and/or the output interface. The memory 802 is used for storing program codes and data of the terminal.

Embodiments of the present application also provide a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform any of the above methods.

Embodiments of the present application also provide a computer program product containing instructions which, when run on a computer, cause the computer to perform any of the methods described above.

An embodiment of the present application further provides a communication system, including: the network equipment and the terminal. Optionally, the terminal is further included.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented using a software program, may 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. The procedures or functions described in accordance with the embodiments of the present application are all or partially generated upon loading and execution of computer program instructions on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer-readable storage media can be any available media that can be accessed by a computer or can comprise one or more data storage devices, such as servers, data centers, and the like, that can be integrated with the media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations may be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

A method of communication, comprising:

a terminal receives system information from a neighboring cell of a first cell in a non-on-demand manner, wherein the system information comprises sidelink configuration information of the neighboring cell, and the sidelink is a direct communication link between the terminal and other terminals;

and the terminal determines the priority of the frequency point adopted by the adjacent cell according to the side link configuration information of the adjacent cell.
The method of claim 1, wherein the terminal receives system information from the neighboring cell of the first cell in a non-on-demand manner, and wherein the method comprises:

and the terminal directly receives the system information from the adjacent cell.
The method of claim 1 or 2, wherein the sidelink configuration information of the neighboring cell comprises one or more of the following information: whether the adjacent cell provides information of side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the first radio access technology; the neighbor cell provides information of only an anchor carrier for a sidelink employing the second radio access technology.
A method of communication, comprising:

a terminal receives system information from a first cell, wherein the system information includes sidelink configuration information of a neighboring cell of the first cell, 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 adjacent cell provides information of side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the first radio access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the second radio access technology;

and the terminal determines the priority of the frequency point adopted by the adjacent cell according to the side link configuration information of the adjacent cell.
The method of claim 4, wherein the terminal receives system information from the first cell, comprising:

the terminal receives system information from the first cell in an on-demand or off-demand manner.
The method of claim 5, wherein the terminal receives system information from the first cell in an on-demand manner, and wherein the method comprises:

the terminal sends a request message to the first cell, wherein the request message is used for requesting the sidelink configuration information of the adjacent cell;

the terminal receives the system information from the first cell.
The method of claim 5, wherein the terminal receives system information from the first cell in a non-on-demand manner, comprising:

the terminal receives the system information directly from the first cell.
The method according to any of claims 4-7, wherein 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.
The method according to any of claims 3-8, wherein the sidelink resource configuration comprises an intra-carrier sidelink resource configuration and/or an inter-carrier sidelink resource configuration.
The method according to claim 9, wherein the configuration of the uplink resources inside the carrier of the neighboring cell refers to the configuration of the uplink resources of the frequency point that is the same as the frequency point used by the neighboring cell, or the configuration of the uplink resources on the carrier that is the same as the carrier used by the neighboring cell; the inter-carrier side link resource allocation of the neighboring cell refers to side link resource allocation of a frequency point different from a frequency point adopted by the neighboring cell, or side link resource allocation on a neighboring frequency of the frequency point adopted by the neighboring cell, or side link resource allocation on a carrier different from a carrier adopted by the neighboring cell.
The method according to any one of claims 3 to 10, wherein the determining, by the terminal, the priority of the frequency point used by the neighboring cell according to the sidelink configuration information of the neighboring cell includes:

and under the condition that the terminal determines that the adjacent cell provides the side link resource configuration according to the side link configuration information of the adjacent cell, the terminal determines the frequency point adopted by the adjacent cell as the frequency point with the highest priority.
The method of claim 11, wherein the terminal satisfies one or more of the following conditions: the terminal is capable of sidelink communications, the terminal is configured for sidelink communications, and the terminal is authorized for sidelink communications.
The method according to any one of claims 3 to 10, wherein the determining, by the terminal, the priority of the frequency point used by the neighboring cell according to the sidelink configuration information of the neighboring cell includes:

under the condition that the terminal is configured to adopt the first radio access technology for side link communication and adopt the second radio access technology for side link communication, the terminal determines the frequency point adopted by the adjacent region, which provides the side link resource configuration adopting the first radio access technology and also provides the side link resource configuration adopting the second radio access technology, as the frequency point with the highest priority; alternatively, the first and second electrodes may be,

under the condition that the terminal is configured to only adopt the first radio access technology for side link communication, the terminal determines the frequency point adopted by the adjacent cell which is provided with the side link resource configuration adopting the first radio access technology as the frequency point with the highest priority; alternatively, the first and second electrodes may be,

and under the condition that the terminal is configured to only adopt the second radio access technology for sidelink communication, the terminal determines the frequency point adopted by the adjacent cell which is configured by the sidelink resource of the second radio access technology as the frequency point with the highest priority.
The method of claim 13, wherein in a case where the terminal is configured to perform the sidelink communication using both the first radio access technology and the second radio access technology, the terminal satisfies one or more of the following conditions: the terminal has the capability of performing sidelink communication by adopting the first wireless access technology and the capability of performing the sidelink communication by adopting the second wireless access technology; the terminal is authorized to conduct sidelink communications employing the first radio access technology and the second radio access technology; alternatively, the first and second electrodes may be,

in a case where the terminal is configured to employ only the first radio access technology for sidelink communication, the terminal satisfies one or more of the following conditions: the terminal is capable of sidelink communications using the first radio access technology, the terminal being authorized to sidelink communications using the first radio access technology; alternatively, the first and second electrodes may be,

in a case where the terminal is configured to employ only the second radio access technology for sidelink communication, the terminal satisfies one or more of the following conditions: the terminal is capable of sidelink communication using the second radio access technology, and the terminal is authorized to sidelink communication using the second radio access technology.
The method according to any of claims 3-14, wherein 1 bit indicates whether the neighboring cell provides a sidelink resource configuration and/or 1 bit indicates whether the neighboring cell provides only an anchor carrier.
The method according to any of claims 3-15, wherein it is indicated by 2 bits whether the neighbouring cell provides a sidelink resource configuration employing the first radio access technology and/or the second radio access technology.
The method according to any of claims 3-16, wherein the sidelink resource configuration comprises a sidelink transmit resource configuration, and/or a sidelink receive resource configuration.
The method of any of claims 3-17, wherein the neighbor cell does not provide the sidelink resource configuration means that the neighbor cell does not provide the sidelink resource configuration via system information, or via dedicated signaling.
The method according to any of claims 3-17, wherein the neighbor cell does not provide the sidelink resource configuration means that the neighbor cell does not provide the sidelink resource configuration through system information, but provides the sidelink resource configuration through dedicated signaling.
The method according to any of claims 1-19, wherein the sidelink configuration information of the neighboring cell comprises one or more of the following information: configuring a corresponding QoS (quality of service) configuration file index by the side-link radio bearer provided by the adjacent cell; whether the neighbor cell has information of side-link radio bearer configuration for starting hybrid automatic repeat request (HARQ); whether the adjacent cell has information of side-link radio bearer configuration adopting a radio link control acknowledgement mode (RLC AM) or not; a sidelink resource pool index provided by the adjacent cell; a CBR index of the minimum channel congestion rate of a side link resource pool provided by the adjacent cell; whether the neighbor cell has the information of the configuration of the synchronous reference source; allocating side link resources provided by the neighboring cell; configuring a side-link radio bearer provided by the neighboring cell; and configuring a synchronous reference source provided by the adjacent cell.
The method according to claim 20, wherein the determining, by the terminal, the priority of the frequency point used by the neighboring cell according to the sidelink configuration information of the neighboring cell includes:

when the terminal is configured with service transmission on a sidelink, the terminal determines a frequency point adopted by an adjacent cell meeting service requirements in the adjacent cell as a frequency point with the highest priority according to the sidelink configuration information of the adjacent cell.
A communication method applied to a network device, the network device providing a neighboring cell of a first cell, the method comprising:

generating system information, wherein the system information comprises sidelink configuration information of the adjacent cell, and the sidelink is a direct communication link between two terminals;

and the adjacent cell sends system information to a terminal in the first cell in a non-on-demand manner, wherein the sidelink configuration information of the adjacent cell in the system information is used for the terminal to determine the priority of the frequency point adopted by the adjacent cell.
The method of claim 22, wherein the sending, by the neighboring cell, system information to the terminal located in the first cell in a non-on-demand manner comprises:

and the neighbor cell directly sends the system information to the terminal.
The method of claim 22 or 23, wherein the sidelink configuration information of the neighboring cell comprises one or more of the following information: whether the adjacent cell provides information of side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the first radio access technology; the neighbor cell provides information of only an anchor carrier for a sidelink employing the second radio access technology.
A communication method applied to a network device providing a first cell, the method comprising:

generating system information, where the system information includes 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 adjacent cell provides information of side link resource configuration or not; whether the neighboring cell only provides information of the anchor carrier; whether the neighboring cell provides information of side link resource allocation adopting a first radio access technology; whether the neighboring cell provides information of side link resource allocation adopting a second wireless access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the first radio access technology; whether the neighbor cell only provides information of an anchor carrier for a sidelink adopting the second radio access technology;

and the first cell sends the system information to a terminal in the first cell, wherein the sidelink configuration information of the adjacent cell in the system information is used for the terminal to determine the priority of the frequency point adopted by the adjacent cell.
The method of claim 25, wherein the sending of the system information by the first cell to the terminals located in the first cell comprises:

and the first cell sends the system information to the terminal in an on-demand mode or a non-on-demand mode.
The method of claim 26, wherein the first cell transmits the system information to the terminal on an on-demand basis, comprising:

the first cell receives a request message from the terminal, wherein the request message is used for requesting the sidelink configuration information of the adjacent cell;

and the first cell sends the system information to the terminal according to the request message.
The method of claim 26, wherein the first cell transmits the system information to the terminal in a non-on-demand manner, and wherein the transmitting comprises:

and the first cell directly sends the system information to the terminal.
The method according to any of claims 25-28, wherein 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.
The method according to any of claims 24-29, wherein the sidelink resource configuration comprises an intra-carrier sidelink resource configuration and/or an inter-carrier sidelink resource configuration.
The method according to claim 30, wherein the configuration of the uplink resources inside the carrier of the neighboring cell refers to a configuration of the uplink resources of a frequency point that is the same as a frequency point used by the neighboring cell, or a configuration of the uplink resources on a carrier that is the same as a carrier used by the neighboring cell; the inter-carrier side link resource allocation of the neighboring cell refers to side link resource allocation of a frequency point different from a frequency point adopted by the neighboring cell, or side link resource allocation on a neighboring frequency of the frequency point adopted by the neighboring cell, or side link resource allocation on a carrier different from a carrier adopted by the neighboring cell.
The method according to any of claims 24-31, wherein 1 bit indicates whether the neighbor cell provides a sidelink resource configuration and/or 1 bit indicates whether the neighbor cell provides only an anchor carrier.
The method according to any of the claims 24-32, wherein it is indicated by 2 bits whether the neighbouring cell provides a sidelink resource configuration employing the first radio access technology and/or the second radio access technology.
The method according to any of claims 24-33, wherein the sidelink resource configuration comprises a sidelink transmission resource configuration, and/or a sidelink reception resource configuration.
The method of any of claims 24-34, wherein the neighbor cell not providing the sidelink resource configuration indicates that the neighbor cell does not provide the sidelink resource configuration via system information and does not provide the sidelink resource configuration via dedicated signaling.
The method of any of claims 24-34, wherein the neighbor cell not providing the sidelink resource configuration indicates that the neighbor cell does not provide the sidelink resource configuration via system information, but provides the sidelink resource configuration via dedicated signaling.
The method according to any of claims 22-36, wherein the sidelink configuration information of the neighboring cell comprises one or more of the following information: configuring a corresponding QoS (quality of service) configuration file index by the side-link radio bearer provided by the adjacent cell; whether the neighbor cell has information of side-link radio bearer configuration for starting hybrid automatic repeat request (HARQ); whether the adjacent cell has information of side-link radio bearer configuration adopting a radio link control acknowledgement mode (RLC AM) or not; a sidelink resource pool index provided by the adjacent cell; a CBR index of the minimum channel congestion rate of a side link resource pool provided by the adjacent cell; whether the neighbor cell has the information of the configuration of the synchronous reference source; allocating side link resources provided by the neighboring cell; configuring a side-link radio bearer provided by the neighboring cell; and configuring a synchronous reference source provided by the adjacent cell.