Resource selection method and apparatus, user equipment, base station, storage medium and chip

Abstract

A resource selection method and device, user equipment, base station, storage medium and chip are provided, and relate to the technical field of communication. The method is applied to user equipment and includes: in response to the absence of a sending resource pool in received system information, using a preconfigured sending resource for sidelink sending. The resource selection method provided in the present disclosure can be used for sidelink sending using a preconfigured sending resource in the case where the system information does not have a sending resource pool, thereby avoiding the disconnection of user equipment from communication and services.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a resource selection method, apparatus, user equipment, base station, storage medium and chip. Background Technology

[0002] To support direct communication between UEs (user equipment), a sidelink communication method was introduced. UEs can communicate with each other through the PC-5 interface (direct communication interface). When a UE needs to communicate with a base station but is outside the coverage area of ​​the base station network, it can use another UE within the coverage area of ​​the base station network as a relay to achieve communication with the base station. The UE not connected to the base station is called a remote UE, and the UE providing relay functionality is called a relay UE. Remote UEs and relay UEs can communicate via unicast, multicast, and broadcast through the sidelink.

[0003] During sidelink communication, the remote UE can use the transmission resource pool in the system information to transmit on the sidelink. However, if there is no transmission resource pool in the system information, the remote UE will not have a usable transmission resource pool to transmit on the sidelink, resulting in the interruption of communication between the remote UE and the relay UE. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this disclosure provides a resource selection method, apparatus, user equipment, base station, storage medium, and chip.

[0005] According to a first aspect of the present disclosure, a resource selection method is provided, applied to a user equipment, the method comprising:

[0006] If the received system information does not contain a transmission resource pool, the pre-configured transmission resources are used for side link transmission.

[0007] According to a second aspect of the present disclosure, a resource selection method is provided, applied to a base station, the method comprising:

[0008] Side link reception is performed to obtain resource requests from user equipment, wherein the resource requests are sent by the user equipment using pre-configured transmission resources when there is no transmission resource pool in the system information.

[0009] According to a third aspect of the present disclosure, a resource selection apparatus is provided, applied to a user equipment, comprising:

[0010] The resource request sending module is configured to use pre-configured sending resources to send data via the side link in response to the absence of a sending resource pool in the received system information.

[0011] According to a fourth aspect of the present disclosure, a resource selection apparatus is provided, applied to a base station, comprising:

[0012] The resource request receiving module is configured to receive resource requests from user equipment via a side link. These resource requests are sent by the user equipment using pre-configured transmission resources when no transmission resource pool exists in the system information.

[0013] According to a fifth aspect of the present disclosure, a user equipment is provided, comprising:

[0014] processor;

[0015] Memory used to store processor-executable instructions;

[0016] The processor is configured to implement the resource selection method provided in the first aspect of the present disclosure when executing the executable instructions.

[0017] According to a sixth aspect of the present disclosure, a base station is provided, comprising:

[0018] processor;

[0019] Memory used to store processor-executable instructions;

[0020] The processor is configured to implement the resource selection method provided in the second aspect of the present disclosure when executing the executable instructions.

[0021] According to a seventh aspect of the present disclosure, a computer-readable storage medium is provided, having stored thereon computer program instructions that, when executed by a processor, implement the steps of the resource selection method provided in the first aspect of the present disclosure, or implement the steps of the resource selection method provided in the second aspect of the present disclosure.

[0022] According to an eighth aspect of the present disclosure, a chip is provided, including a processor and an interface; the processor is configured to read instructions to execute the steps of the resource selection method provided in the first aspect of the present disclosure, or to execute the steps of the resource selection method provided in the second aspect of the present disclosure.

[0023] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0024] If the system information does not have a transmission resource pool, the remote UE can use the pre-configured transmission resources to continue sidelink transmission, enabling the remote UE to interact with the relay UE or base station for data or signaling, thus avoiding communication or service interruption for the remote UE.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0027] Figure 1 This is a flowchart illustrating a resource selection method according to an exemplary embodiment.

[0028] Figure 2 This is a flowchart illustrating a resource selection method according to an exemplary embodiment.

[0029] Figure 3 This is a flowchart illustrating a resource selection method according to an exemplary embodiment.

[0030] Figure 4 This is a flowchart illustrating a resource selection method according to an exemplary embodiment.

[0031] Figure 5 This is a flowchart illustrating a resource selection method according to an exemplary embodiment.

[0032] Figure 6 This is a flowchart illustrating a resource selection method according to an exemplary embodiment.

[0033] Figure 7 This is a flowchart illustrating a resource selection method according to an exemplary embodiment.

[0034] Figure 8 This is a flowchart illustrating a resource selection method according to an exemplary embodiment.

[0035] Figure 9 This is a flowchart illustrating a resource selection method according to an exemplary embodiment.

[0036] Figure 10 This is a flowchart illustrating a resource selection method according to an exemplary embodiment.

[0037] Figure 11 This is a block diagram illustrating a resource selection apparatus according to an exemplary embodiment.

[0038] Figure 12 This is a block diagram illustrating a resource selection apparatus according to an exemplary embodiment.

[0039] Figure 13 This is a block diagram illustrating a user device according to an exemplary embodiment.

[0040] Figure 14 This is a block diagram illustrating a base station according to an exemplary embodiment. Detailed Implementation

[0041] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0042] It should be noted that all actions involving the acquisition of signals, information, or data in this application are carried out in compliance with the relevant data protection laws and policies of the country where the application is located, and with the authorization granted by the owner of the relevant device.

[0043] Figure 1 This is a flowchart illustrating a resource selection method according to an exemplary embodiment, such as... Figure 1 As shown, this resource selection method can be applied to a user equipment, which can be the aforementioned remote UE. The method includes the following steps.

[0044] In step S101, in response to the absence of a transmission resource pool in the received system information, the pre-configured transmission resources are used to perform side link transmission.

[0045] For example, to support direct communication between UEs, in this embodiment, data communication is established between the devices through 5G (Fifth Generation Mobile Communication System) and 4G (Fifth Generation Mobile Communication System) technologies. Based on the sidelink (SL) communication method, UEs can communicate directly with each other through the PC-5 interface. According to the correspondence between UEs, unicast, multicast, and broadcast methods are supported on the sidelink. The sending UE sends sidelink control information (SCI) on the PSCCH (Physical Sidelink Control Channel) and a second-stage SCI on the PSSCH (Physical Sidelink Shared Channel). The SCI carries the resource location of the transmitted data, the source UE identifier, and the destination UE identifier, etc. After receiving the SCI, the receiving UE determines whether to receive the corresponding data and which process it corresponds to based on the source UE identifier and the destination UE identifier contained therein. In a unicast connection, each UE corresponds to a destination identifier. In a multicast connection, each UE can belong to one or more groups, and each group corresponds to a destination identifier. In a broadcast connection, all UEs correspond to at least one destination identifier.

[0046] Sidelink communication has two methods for allocating transmission resources: one is dynamic network scheduling, and the other is that the UE selects resources from the resource pool broadcast by the base station.

[0047] Among them, the network dynamic scheduling method is that the base station dynamically allocates transmission resources on the sidelink to the UE based on the UE's cached data report. The UE can be a relay UE covered by the base station network.

[0048] The autonomous selection method involves the UE randomly selecting transmission resources from the transmission resource pool in the system information, pre-configured transmission resources, or transmission resources in the RRC (Radio Resource Control) reconfiguration message. For system information, the base station can send system information to the remote UE. For example, the base station can generate system information based on whether there are resource pools in the network and which resource pools are available. The base station then broadcasts this system information, and UEs covered by the base station network obtain the system information. These UEs can act as relay UEs to forward the system information to remote UEs. When the remote UE is in an idle or inactive state, it can use the transmission resource pool in the system information broadcast by the base station to perform sidelink transmission. As for the RRC reconfiguration message, the RRC reconfiguration message is a message generated by the base station after the UE reports a resource request. This message carries the transmission resources returned by the base station to the UE. When the UE enters the connected state, the UE can use the transmission resources in the reconfiguration message to perform sidelink transmission. The pre-configured transmission resources are transmission resources pre-configured in the remote UE. When the UE is in an offline state, the UE can use the pre-configured transmission resources to perform sidelink transmission. The offline state includes the UE not being covered by the base station network.

[0049] Among them, the system information transmission resources and RRC reconfiguration messages are both sent by the base station, the pre-configured transmission resource pool is configured in advance by the UE, and the system information can be SIB12.

[0050] It is worth noting that the transmission resource in the RRC reconfiguration message can be a transmission resource pool, and the UE can select at least one transmission resource from the transmission resource pool to perform side-link transmission; the pre-configured transmission resource can be a pre-configured transmission resource pool, and the UE can select at least one transmission resource from the pre-configured transmission resource pool to perform side-link transmission.

[0051] It is worth noting that the transmission resource pool can be the relay-side traversal transmission resource pool, and the transmission resources can be the relay-side traversal transmission resources. The relay-side traversal includes the remote UE, the relay UE, and the base station. The remote UE and the base station interact through the relay UE. The relay-side traversal transmission resources are sidelink transmission resources, and the relay-side traversal transmission resource pool is the sidelink transmission resource pool.

[0052] Sidelink transmission resources consist of time and frequency domain resource parameters. Each base station can schedule sidelink transmission resources for the corresponding time period from the sidelink transmission resource pool through the time domain, and determine the corresponding sidelink transmission resources from the sidelink transmission resource pool through the frequency domain to satisfy the UE's resource requests. For example, taking 4G communication technology as an example, a 4G base station schedules sidelink transmission resources in the sidelink transmission resource pool through DCI (Downlink Control Information). The DCI is set to carry a time domain of 10:00-11:00 and a frequency domain of 1880MHz-1900MHz. The UE then determines the sidelink transmission resources in the 1880MHz-1900MHz frequency band within the 10:00-11:00 period based on this DCI as feedback for the UE's transmission resource request.

[0053] The resource pools for network dynamic scheduling and autonomous selection are separate. Network dynamic scheduling is uniformly allocated by the base station to transmit resources. Therefore, collisions between different UEs can be avoided through reasonable algorithms.

[0054] The base station can carry a transmission resource pool in the system information, and the UE can choose from the transmission resource pools in the system information. There are two types of transmission resource pools in the system information: a general transmission resource pool (sl-TxPoolSelectedNormal) and a special transmission resource pool (sl-TxPoolExceptional). If the system information carries a general transmission resource pool, the UE uses the general transmission resource pool; if the system information does not carry a general transmission resource pool, the UE uses the special transmission resource pool; if the system information does not carry any transmission resource pool, the UE needs to use the pre-configured transmission resources for sidelink transmission.

[0055] It is worth noting that sidelink transmission can be performed. During sidelink transmission, the remote UE can carry data or commands intended for a relay UE or base station, which are transmitted over the sidelink. For example, during sidelink transmission, it can carry resource requests from the remote UE to the base station, or RRC reconfiguration messages from the base station to the remote UE.

[0056] It is worth noting that the user equipment proposed in any embodiment of this disclosure can be a mobile phone, tablet, portable computer, computer with wireless transceiver function, virtual reality (VR) terminal device, augmented reality (AR) terminal device, wireless terminal in industrial control, wireless terminal in smart grid, wireless terminal in transportation safety, wireless terminal in smart city, wireless terminal in smart home, etc. This disclosure does not limit the application scenario. User equipment may also be referred to as terminal device, terminal, access terminal, UE unit, UE station, mobile device, mobile station, mobile station, mobile client, etc.

[0057] It is worth noting that the pre-configured transmission resources can be configured in the UE by the developers in advance. The pre-configured transmission resources are resource parameters in the time domain and frequency domain. The frequency domain segment, time period, available duration and bandwidth of the transmission resources can be configured in the UE in advance.

[0058] The UE can obtain system information broadcast by the base station. Thus, relay UEs located within the base station's network coverage area can also obtain this system information. When the remote UE is offline, after sending a system information request to the relay UE using pre-configured transmission resources, the relay UE can forward the obtained base station system information to the remote UE. If the remote UE determines that the system information does not contain a transmission resource pool, it cannot perform sidelink transmission. In order to perform sidelink transmission, it can continue to use the pre-configured transmission resources for sidelink transmission.

[0059] With the above scheme, in the absence of a transmission resource pool in the system information, the remote UE can use the pre-configured transmission resources to continue sidelink transmission, enabling the remote UE to interact with the relay UE or base station for data or signaling, thus avoiding communication or service interruption for the remote UE.

[0060] Figure 2 This is a flowchart illustrating a resource selection method according to an exemplary embodiment, such as... Figure 2 As shown, this resource selection method is applied to user equipment, and the method includes the following steps.

[0061] In step S201, in response to receiving system information sent by the relay device that the transmission resource pool does not exist, the pre-configured transmission resources are used to perform side link transmission.

[0062] For example, this embodiment is applied to a user equipment, which can be the remote UE that interacts with the base station through the relay UE as described above. The communication signal between the remote UE and the relay UE can be transmitted using sidelink unicast. The relay device can be a relay UE used to establish a communication connection between the remote UE and the base station. The relay device is covered by the base station network.

[0063] For example, a base station can broadcast system information over the network. Relay UEs covered by the base station's network can receive this system information. Therefore, a remote UE can respond to the absence of a transmission resource pool in the relay UE's base station's system information by using pre-configured transmission resources for sidelink transmission. The system information received by the remote UE from the relay UE can be obtained by the relay UE from the base station.

[0064] It is worth noting that the coverage area of ​​the base station network is the serving cell, and relay UEs can obtain system information broadcast by the base station from the serving cell. The serving cell is the area covered by the base station or a part of the base station in the communication system, and UEs within this area can communicate with each other through a wireless channel.

[0065] It is worth noting that a UE can communicate with a base station without directly connecting to it, but through a relay of another UE. The UE that is not connected to the base station is called a remote UE, and the UE that provides relay function is called a relay UE. The remote UE and the relay UE communicate through sidelink unicast. This architecture is called U2N (UE to NW) relay.

[0066] During the process of a remote UE accessing the network through a relay UE, before obtaining the system information forwarded by the relay UE, it can use pre-configured transmission resources to perform side-link transmission, thereby interacting with the relay UE for signaling and data.

[0067] For example, a remote UE can send a system information request to a relay UE using pre-configured transmission resources. The system information request carries a system information identifier. The relay UE determines the system information based on the system information identifier and returns the system information to the remote UE. The relay UE can obtain the system information broadcast by the base station.

[0068] It should be understood that the method may further include: receiving system messages, which may be broadcast by the base station. When the remote UE is covered by the base station network, the remote UE directly receives the system messages broadcast by the base station; when the remote UE is not covered by the base station network, the system messages may also be sent by the base station to a relay UE and forwarded by the relay UE to the remote UE. This disclosure does not impose any limitations on this.

[0069] Through the above technical solution, the remote UE can receive system information obtained by the relay UE from the base station; if it is determined that there is no transmission resource pool in the system information, the pre-configured transmission resources are used to transmit on the side link to ensure the communication connection between the remote UE and the relay UE and avoid communication and service interruption of the remote UE.

[0070] Figure 3 This is a flowchart illustrating a resource selection method according to an exemplary embodiment, such as... Figure 3 As shown, this resource selection method is applied to user equipment, and the method includes the following steps.

[0071] In step S301, if the sending resource pool is not present in the system information, the system enters the connection state.

[0072] For example, when the remote UE receives system information and determines that there is no transmit resource pool in the system information, the remote UE enters the connected state.

[0073] When a remote UE enters the connected state, it indicates that the remote UE needs to interact with the relay UE or the base station for data or signaling, and that the remote UE is in an offline state.

[0074] In step S302, a request for transmission resources is made to the base station according to the pre-configured transmission resources.

[0075] For example, after the remote UE enters the connected state, in order to meet the remote UE's need to interact with the relay UE or the base station for data or signaling, the remote UE can use the transmission resources pre-configured in the remote UE to send a resource request to the relay UE, and the relay UE will forward the resource request to the base station.

[0076] Since the relay UE is covered by the base station network, the relay UE can forward the resource request sent by the remote UE to the base station. The resource request is used to request the base station to send resources so that the remote UE can use the sending resources allocated by the base station to communicate with the base station or the relay UE.

[0077] In step S303, a reconfiguration message returned by the base station is received, the reconfiguration message carrying the transmission resources or transmission resource pool returned by the base station.

[0078] For example, after receiving a resource request, the base station can generate a reconfiguration message carrying the transmission resource or transmission resource pool to return the transmission resource or transmission resource pool to the remote UE.

[0079] Among them, the reconfiguration message can be an RRC reconfiguration message, which is generated by the base station based on the resource request reported by the remote UE, and is used to allocate transmission resources or transmission resource pools to the remote UE.

[0080] It should be understood that the method may further include: receiving system messages, which may be broadcast by the base station. When the remote UE is covered by the base station network, the remote UE directly receives the system messages broadcast by the base station; when the remote UE is not covered by the base station network, the system messages may also be sent by the base station to a relay UE and forwarded by the relay UE to the remote UE. This disclosure does not impose any limitations on this.

[0081] Through the above technical solution, the remote UE can receive system information obtained by the relay UE from the base station; if it is determined that there is no transmission resource pool in the system information, the pre-configured transmission resources are used to transmit on the side link to ensure the communication connection between the remote UE and the relay UE and avoid communication and service interruption of the remote UE.

[0082] Figure 4 This is a flowchart illustrating a resource selection method according to an exemplary embodiment, such as... Figure 4 As shown, this resource selection method is applied to user equipment, and the method includes the following steps.

[0083] In step S401, in response to the absence of a transmission resource pool in the received system information, the pre-configured transmission resources are used to perform side-link transmission.

[0084] For example, step S401 in the embodiments of this disclosure can refer to step S201 above, and will not be repeated here.

[0085] In step S402, upon receiving the transmission resources or transmission resource pool returned by the base station, the use of the pre-configured transmission resources is stopped.

[0086] For example, if a remote UE receives transmission resources or a transmission resource pool returned by the base station, it indicates that the remote UE can use the transmission resources requested from the base station to continue transmitting data or signaling with the base station or relay UE. In this case, the pre-configured transmission resources can no longer be used to transmit data or signaling with the base station or relay UE.

[0087] When a base station receives a resource request from a remote UE, it can package the resource to be sent or the resource pool to be sent as reconfiguration information and return it to the remote UE.

[0088] With the above technical solution, when the remote UE receives the transmission resources or transmission resource pool carried in the reconfiguration message returned by the base station, it indicates that the remote UE has successfully requested transmission resources from the base station. At this time, the remote UE can use the transmission resources allocated by the base station to perform sidelink transmission without having to continue using the pre-configured transmission resources.

[0089] Figure 5 This is a flowchart illustrating a resource selection method according to an exemplary embodiment, such as... Figure 5 As shown, this resource selection method is applied to user equipment, and the method includes the following steps.

[0090] In step S501, if the user equipment meets any of the following conditions, it is determined that the user equipment is connected to the base station through the relay device:

[0091] The user equipment was not covered by the network.

[0092] The reference signal received power between the user equipment and the base station is less than a threshold.

[0093] The user equipment selects the relay device;

[0094] The user equipment is configured with a direct link and an indirect link, with the indirect link serving as the main link. The indirect link is the link through which the user equipment communicates with the base station via the relay device.

[0095] When the remote UE is not covered by the base station network, it means that the remote UE needs to connect to the base station through a relay UE in order to interact with the base station. Therefore, when the remote UE is not covered by the base station network, the remote UE establishes a connection with the base station through a relay UE.

[0096] When the RSRP (Reference Signal Receiving Power) between the remote UE and the base station is less than the threshold, it indicates that the network signal received by the remote UE is poor and it cannot access the base station's network. In this case, the remote UE also establishes a connection with the base station through a relay UE.

[0097] Among them, the remote UE can connect directly to the base station, or it can connect to the base station through a relay UE. When the remote UE selects one relay UE from multiple relay UEs to communicate with the base station, it means that the remote UE connects to the base station through a relay UE.

[0098] For example, when the remote UE is not covered by the network, or when the RSRP between the remote UE and the base station is less than a threshold, it is determined that the remote UE may select a relay UE.

[0099] Among them, there is one SRB (Signaling Radio Bearer) main link and multiple SRB non-main links between the remote UE and the base station. When the indirect link is the SRB main link, it indicates that the indirect link between the remote UE, the relay UE and the base station is the main link for sending data or signaling. At this time, it can be determined that the remote UE is connected to the base station through the relay UE to transmit data or signaling.

[0100] A remote UE is configured with at least one direct link and one indirect link to communicate with the base station. The direct link is the link where the remote UE directly connects to the base station, while the indirect link is the link where the remote UE communicates with the base station through a relay UE. An indirect link can be determined as the primary link based on any of the following conditions, and a direct link can also be determined as the primary link based on any of the following conditions.

[0101] For example, in an indirect link, the primary link is determined by any of the following conditions:

[0102] The indirect link is used to transmit radio signaling bearers, which can be SRBs.

[0103] The indirect link is the main transmission path for transmitting the radio signaling bearer;

[0104] In the event of a failure of the indirect link connection, the reconfiguration information of the base station is triggered;

[0105] The indirect link is a path used to maintain the connection between the user equipment and the base station;

[0106] The indirect link is an anchor path;

[0107] The indirect link connects to the primary cell of the user equipment.

[0108] Among them, the indirect link used for transmitting SRB includes the indirect link being the main transmission path for transmitting SRB and the indirect link being a non-main transmission path for transmitting SRB. When the indirect link is used for transmitting SRB, it can be determined that the indirect link can be used to access the network, and at this time it can be determined that the indirect link is the main link.

[0109] When an indirect link is the main transmission path used to transmit SRBs, it can also be determined that the indirect link is used to access the network, thus identifying the indirect link as the main link.

[0110] The reconfiguration message is sent by the base station to the remote UE via a relay UE when the remote UE is not covered by the network. After receiving the reconfiguration message, the remote UE will establish a connection with the base station based on the transmission resources or transmission resource pool in the reconfiguration message. This indirect link can realize the main signaling or data forwarding, so it can be used as the main link.

[0111] When an indirect link is used to maintain the connection between a remote UE and a base station, it means that the indirect link can enable signaling or data forwarding between the remote UE and the base station. Other links may not be able to maintain the connection between the remote UE and the base station, and thus cannot enable signaling or data forwarding. Therefore, the indirect link can be used as the main link.

[0112] In the case of an indirect link being an anchor path, since the anchor path is another name for the main path, the indirect path is the main path.

[0113] In dual-connectivity (DC), the access network equipment that interacts with the core network through control signaling can be called the master node (MN), and other access network equipment can be called secondary nodes (SN). The serving cell group provided by the master node to the UE can be called the master cell group (MCG), and the serving cell group provided by the slave node to the terminal equipment can be called the secondary cell group (SCG). The master cell plays a core control role, and the secondary cell assists the master cell in data transmission. When the indirect link connects to the master cell of a remote UE, it indicates that the indirect link is the main control link, and therefore the indirect link can be used as the master link.

[0114] The above technical solution can determine that the UE is a remote UE that accesses the base station network through a relay UE. After determining the remote UE, the remote UE confirms whether the received system information exists in the transmission resource pool. If the transmission resource pool does not exist, the pre-configured transmission resources are used for side link transmission to avoid communication and service interruption of the remote UE.

[0115] Figure 6 This is a flowchart illustrating a resource selection method according to an exemplary embodiment, such as... Figure 6 As shown, this resource selection method is applied to user equipment, and the method includes the following steps.

[0116] In step S601, in response to the absence of a general transmission resource pool and a special transmission resource pool in the system information, the pre-configured transmission resources are used for side link transmission.

[0117] For example, the base station can generate system information based on whether there is a resource pool in the network and which resource pools there are. The system information may contain both a general transmission resource pool and a special transmission resource pool, or only one of them, or no transmission resource pool. If the remote UE determines that there is no general transmission resource pool or a special transmission resource pool in the received system information, it determines that there is no transmission resource pool in the system information. In order to ensure that the remote UE can perform side link transmission, it can use the transmission resources pre-configured by the remote UE to perform side link transmission.

[0118] In step S602, if a general transmission resource pool exists in the system information, side link transmission is performed according to the general transmission resource pool.

[0119] For example, if the system information contains both a general transmission resource pool and special transmission resources, or if a general transmission resource pool exists, the general transmission resource pool will be used first for data or signaling interaction with the relay UE or base station.

[0120] The remote UE can select at least one transmission resource from the general transmission resource pool to perform sidelink transmission.

[0121] In step S603, if the general transmission resource pool is not present in the system information, but a special transmission resource pool exists, side link transmission is performed according to the special transmission resource pool.

[0122] For example, if a general transmission resource pool does not exist in the system information, but a special transmission resource pool does exist, the special transmission resource pool is used to interact with the relay UE or base station for data or signaling.

[0123] The remote UE can select at least one transmission resource from a special transmission resource pool to perform sidelink transmission.

[0124] The above technical solution enables the use of pre-configured transmission resources for sidelink transmission in cases where the received system information does not contain a transmission resource pool and the remote UE may disconnect from communication, thereby ensuring the normal communication of the remote UE.

[0125] Figure 7 This is a flowchart illustrating a resource selection method according to an exemplary embodiment, such as... Figure 7 As shown, this resource selection method is applied to a base station, and the method includes the following steps.

[0126] In step S701, a side link reception is performed to obtain a resource request from the user equipment, wherein the resource request is sent by the user equipment using pre-configured transmission resources when there is no transmission resource pool in the system information.

[0127] For example, the base station can be a base station used for public mobile communication, such as the base station of the aforementioned serving cell, and in 5G, the base station can be a gNodeB.

[0128] Sidelink reception can be performed by the base station. During sidelink reception, the base station can carry data or commands that interact with the relay UE or remote UE and transmit them through the sidelink. For example, during sidelink reception, it can carry resource requests sent by the remote UE to the base station, or RRC reconfiguration messages sent by the base station to the remote UE.

[0129] It is worth noting that the transmission resource pool can be a relay-side traversal transmission resource pool, and the transmission resources can be relay-side traversal transmission resources. The relay-side traversal includes the remote UE, the relay UE, and the base station. The remote UE and the base station interact through the relay UE. The relay-side traversal transmission resources are sidelink transmission resources, and the relay-side traversal transmission resource pool is a sidelink transmission resource pool. These two types of transmission resources are used for communication between UEs.

[0130] The resource request is sent by the user equipment using the pre-configured transmission resources when the system information received from the relay device does not exist in the transmission resource pool.

[0131] For example, the resource request is sent by the user equipment to the base station using the pre-configured transmission resources when the transmission resource pool is not present in the system information of the base station of the relay equipment.

[0132] The base station can send system resources to the remote UE. The base station broadcasts the system resources to the serving cell. The relay UE located in the serving cell sends the system resources to the remote UE, so that the remote UE can receive system information from the base station of the relay device.

[0133] The above scheme enables side-link reception in the absence of a transmission resource pool in the system information, obtaining resource requests sent by the user equipment using pre-configured transmission resources. This allows the remote UE to interact with the relay UE or base station for data or signaling, avoiding communication and service interruptions for the remote UE.

[0134] Figure 8 This is a flowchart illustrating a resource selection method according to an exemplary embodiment, such as... Figure 8 As shown, this resource selection method is applied to a base station, and the method includes the following steps.

[0135] In step S801, side link reception is performed to obtain the resource request sent by the user equipment using pre-configured transmission resources after it enters the connected state.

[0136] For example, when the remote UE receives system information and determines that there is no transmit resource pool in the system information, the remote UE enters the connected state.

[0137] When a remote UE enters the connected state, it indicates that the remote UE needs to interact with the relay UE or the base station for data or signaling, and the remote UE is in a state where it is not covered by the network.

[0138] Once the base station receives a resource request, it can determine that the remote UE is offline, and the remote UE's communication or services may be interrupted.

[0139] In step S802, a reconfiguration message is returned to the user equipment, the reconfiguration message carrying the transmission resources or transmission resource pool returned by the base station.

[0140] Upon receiving a resource request, the base station can generate a reconfiguration message to allocate transmission resources to the remote UE. This reconfiguration message can be an RRC reconfiguration message, generated by the base station in response to a resource request reported by the remote UE.

[0141] For example, there are two ways to allocate transmission resources in communication: one is through dynamic network scheduling by the base station, and the other is through the UE's autonomous selection from the resource pool of reconfiguration messages, the pre-configured resource pool, or the resource pool of system information.

[0142] In dynamic scheduling mode, the UE sends a resource request to the base station. The base station selects dynamic scheduling mode and sends a dynamic scheduling instruction back to the UE, which includes information that the UE needs to report. The UE sends its cached data to the base station based on the dynamic scheduling instruction. The base station dynamically schedules and sends resources based on the cached data and returns the resources to the UE. The UE then uses these resources to achieve communication. This can be a relay UE covered by the base station network.

[0143] In the autonomous selection mode, if the remote UE has a system information transmission resource pool, the remote UE will select the transmission resources in the system information resource pool to interact with the relay UE or the base station; if the system information received by the remote UE does not carry a transmission resource pool, the remote UE can select the transmission resources in the pre-configured transmission resource pool to interact with the relay UE and send the resource request to the base station through the relay UE; the base station then generates a reconfiguration message based on the resource request reported by the remote UE and sends the reconfiguration message to the remote UE through the relay UE. The reconfiguration message may carry the transmission resources or transmission resource pool sent by the base station to the remote UE.

[0144] It is worth noting that the sending resource or sending resource pool can be a resource for transmitting data. Using the sending resource or sending resource pool can enable data interaction between the remote UE and other devices.

[0145] Through the above technical solution, in the absence of a transmission resource pool in the system information, side link reception is performed to obtain the resource request sent by the user equipment using the pre-configured transmission resources, enabling the remote UE to interact with the relay UE or base station for data or signaling, thus avoiding communication and service interruption of the remote UE.

[0146] Figure 9 This is a flowchart illustrating a resource selection method according to an exemplary embodiment, such as... Figure 9As shown, this resource selection method is applied to a base station, and the method includes the following steps.

[0147] In step S901, a side link reception is performed to obtain a resource request from the user equipment, wherein the resource request is sent by the user equipment using pre-configured transmission resources when there is no transmission resource pool in the system information.

[0148] For example, the method for side link reception in the embodiments of this disclosure can refer to the above step S801, and will not be repeated here.

[0149] In step S902, the transmission resource or the transmission resource pool is returned to the user equipment so that the user equipment can stop using the pre-configured transmission resource.

[0150] For example, in the embodiments of this disclosure, stopping the use of pre-configured transmission resources can be done by referring to step S402 above, and will not be repeated here.

[0151] With the above technical solution, after the base station returns a reconfiguration message to the remote UE, it indicates that the remote UE has successfully requested transmission resources from the base station. At this time, the remote UE can use the transmission resources allocated by the base station to transmit signaling or data with the relay UE or the base station, without having to continue using the pre-configured transmission resources.

[0152] A resource selection method is illustrated according to an exemplary embodiment, the method being applied in a base station, the method comprising the following steps.

[0153] In step S110, if the user equipment meets any of the following conditions, it is determined that the user equipment is connected to the base station through the relay device:

[0154] The user equipment was not covered by the network.

[0155] The reference signal received power between the user equipment and the base station is less than a threshold.

[0156] The user equipment selects the relay device;

[0157] The user equipment is configured with a direct link and an indirect link, with the indirect link serving as the main link. The indirect link is the link through which the user equipment communicates with the base station via the relay device.

[0158] The indirect link is designated as the primary link if any of the following conditions are met:

[0159] The indirect link is used to transmit wireless signaling bearers;

[0160] The indirect link is the main transmission path for transmitting the radio signaling bearer;

[0161] In the event of a failure of the indirect link connection, the reconfiguration information of the base station is triggered;

[0162] The indirect link is a path used to maintain the connection between the user equipment and the base station;

[0163] The indirect link is an anchor path;

[0164] The indirect link connects to the primary cell of the user equipment.

[0165] For example, in the embodiments of this disclosure, the conditions for determining whether a user equipment communicates with a base station through a relay device can be referred to step S501 above, and will not be repeated here.

[0166] The above technical solution can determine that the UE is a remote UE that accesses the base station network through a relay UE. After determining the remote UE, the remote UE confirms whether the received system information exists in the transmission resource pool. If the transmission resource pool does not exist, the pre-configured transmission resources are used for side link transmission to avoid communication and service interruption of the remote UE.

[0167] Figure 10 This is a flowchart illustrating a resource selection method according to an exemplary embodiment, such as... Figure 10 As shown, this resource selection method is applied to a base station, and the method includes the following steps.

[0168] In step S220, if neither a general transmission resource pool nor a special transmission resource pool exists in the system information, side link reception is performed to obtain the resource request of the user equipment.

[0169] For example, in the embodiments of this disclosure, determining the resource request of the user equipment can refer to the above step S601, and will not be repeated here.

[0170] In step S221, if a general transmission resource pool exists in the system information, a resource request sent by the user equipment according to the general transmission resource pool is received.

[0171] For example, the general transmission resource pool in the embodiments of this disclosure can refer to step S602 above, and will not be repeated here.

[0172] In step S222, if the general transmission resource pool is not present in the system information but a special transmission resource pool exists, the resource request sent by the user equipment according to the special transmission resource pool is received.

[0173] For example, the special transmission resource pool in the embodiments of this disclosure can refer to step S603 above, and will not be repeated here.

[0174] The above technical solution can ensure normal communication of the remote UE by receiving resource requests sent by the remote UE using pre-configured sending resources, even when the receiving system information does not contain a sending resource pool and the remote UE may disconnect communication.

[0175] Figure 11 This is a block diagram illustrating a resource selection apparatus according to an exemplary embodiment. (Refer to...) Figure 11 The resource selection device 120 includes a resource request sending module 121.

[0176] The resource request sending module 121 is configured to use pre-configured sending resources to send data via the side link in response to the absence of a sending resource pool in the received system information.

[0177] Optionally, the user equipment is a remote device in the relay-side crosslink, and the user equipment communicates with the base station through the relay device; the resource request sending module 121 includes:

[0178] The first resource request sending module is configured to, in response to receiving system information sent by the relay device that the sending resource pool does not exist, use the pre-configured sending resources to perform side link sending.

[0179] Optionally, the system information transmitted by the relay device is obtained from the base station to which the relay device is connected.

[0180] Optionally, the resource request sending module 121 includes:

[0181] The connection module is configured to enter a connection state if the transmission resource pool is not found in the system information.

[0182] The second resource request sending module is configured to request sending resources from the base station according to the pre-configured sending resources;

[0183] The reconfiguration message receiving module is configured to receive a reconfiguration message returned by the base station, wherein the reconfiguration message carries the transmission resources or transmission resource pool returned by the base station.

[0184] Optionally, the resource selection device 120 includes:

[0185] The first stop module is configured to stop using the pre-configured transmission resources upon receiving transmission resources or a transmission resource pool returned by the base station.

[0186] Optionally, the resource selection device 120 includes:

[0187] The user equipment is determined to be connected to the base station via the relay equipment if any of the following conditions are met:

[0188] The user equipment was not covered by the network.

[0189] The reference signal received power between the user equipment and the base station is less than a threshold.

[0190] The user equipment selects the relay device;

[0191] The user equipment is configured with a direct link and an indirect link, with the indirect link serving as the main link. The indirect link is the link through which the user equipment communicates with the base station via the relay device.

[0192] Optionally, the resource selection device 120 includes:

[0193] The indirect link shall be designated as the primary link if any of the following conditions are met:

[0194] The indirect link is used to transmit wireless signaling bearers;

[0195] The indirect link is the main transmission path for transmitting the radio signaling bearer;

[0196] In the event of a failure of the indirect link connection, the reconfiguration information of the base station is triggered;

[0197] The indirect link is a path used to maintain the connection between the user equipment and the base station;

[0198] The indirect link is an anchor path;

[0199] The indirect link connects to the primary cell of the user equipment.

[0200] Optionally, the resource request sending module 121 includes:

[0201] The third resource request sending module is configured to use the pre-configured sending resources to send data via the side link in response to the absence of a general sending resource pool or a special sending resource pool in the system information.

[0202] Optionally, the resource selection device 120 includes:

[0203] The fourth resource request sending module is configured to send a side link request based on the general sending resource pool if a general sending resource pool exists in the system information.

[0204] The fifth resource request sending module is configured to send a side link request based on the special sending resource pool when the general sending resource pool does not exist in the system information but a special sending resource pool does exist.

[0205] Optionally, the transmission resource pool is a relay-side link transmission resource pool, and the transmission resources are relay-side link transmission resources.

[0206] Figure 12 This is a block diagram illustrating a resource selection apparatus according to an exemplary embodiment. (Refer to...) Figure 12 The resource selection device 220 includes a resource request receiving module 221.

[0207] The resource request receiving module 221 is configured to receive sidelink data to obtain resource requests from user equipment, wherein the resource request is sent by the user equipment using pre-configured transmission resources when there is no transmission resource pool in the system information.

[0208] Optionally, the user equipment is a remote device in the relay-side crosslink, and the user equipment communicates with the base station through the relay device;

[0209] Furthermore, the resource request is sent by the user equipment using the pre-configured transmission resources when the transmission resource pool is not present in the system information received from the relay device.

[0210] Optionally, the resource request is sent by the user equipment to the base station using the pre-configured transmission resources when the transmission resource pool is not present in the system information of the base station of the relay equipment.

[0211] Optionally, the resource request receiving module 221 includes:

[0212] The first resource request receiving module is configured to perform side link reception to obtain the resource request sent by the user equipment using the pre-configured sending resources after the user equipment enters the connected state.

[0213] The reconfiguration message sending module is configured to return a reconfiguration message to the user equipment, the reconfiguration message carrying the sending resources or sending resource pool returned by the base station.

[0214] Optionally, the resource selection device 220 includes:

[0215] The second stop module is configured to return the transmission resource or the transmission resource pool to the user equipment, so that the user equipment can stop using the pre-configured transmission resource.

[0216] Optionally, the resource selection device 220 includes:

[0217] The user equipment is determined to be connected to the base station via the relay equipment if any of the following conditions are met:

[0218] The user equipment was not covered by the network.

[0219] The reference signal received power between the user equipment and the base station is less than a threshold.

[0220] The user equipment selects the relay device;

[0221] The user equipment is configured with a direct link and an indirect link, with the indirect link serving as the main link. The indirect link is the link through which the user equipment communicates with the base station via the relay device.

[0222] Optionally, the resource selection device 220 includes:

[0223] The indirect link shall be designated as the primary link if any of the following conditions are met:

[0224] The indirect link is used to transmit wireless signaling bearers;

[0225] The indirect link is the main transmission path for transmitting the radio signaling bearer;

[0226] In the event of a failure of the indirect link connection, the reconfiguration information of the base station is triggered;

[0227] The indirect link is a path used to maintain the connection between the user equipment and the base station;

[0228] The indirect link is an anchor path;

[0229] The indirect link connects to the primary cell of the user equipment.

[0230] Optionally, the resource request receiving module 221 includes:

[0231] The second resource request receiving module is configured to receive the user equipment's resource request via a side link when neither a general transmission resource pool nor a special transmission resource pool exists in the system information.

[0232] Optionally, the resource request receiving module 221 includes:

[0233] The third resource request receiving module is configured to receive resource requests sent by the user equipment according to the general transmission resource pool when a general transmission resource pool exists in the system information.

[0234] The fourth resource request receiving module is configured to receive resource requests sent by the user equipment based on the special transmission resource pool when the general transmission resource pool does not exist in the system information but a special transmission resource pool does exist.

[0235] Optionally, the transmission resource pool is a relay-side link transmission resource pool, and the transmission resources are relay-side link transmission resources.

[0236] Optionally, the resource selection device 220 includes:

[0237] The system information sending module is configured to send system information to the user equipment.

[0238] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0239] This disclosure also provides a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the steps of the resource selection method provided in this disclosure.

[0240] Figure 13 This is a block diagram illustrating a user equipment device 800 according to an exemplary embodiment. For example, device 800 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0241] Reference Figure 13 The device 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input / output interface 812, a sensor component 814, and a communication component 816.

[0242] Processing component 802 typically controls the overall operation of device 800, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 802 may include one or more processors 820 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 802 may include one or more modules to facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

[0243] Memory 804 is configured to store various types of data to support the operation of device 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, etc. Memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0244] Power supply component 806 provides power to various components of device 800. Power supply component 806 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to device 800.

[0245] Multimedia component 808 includes a screen that provides an output interface between the device 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 808 includes a front-facing camera and / or a rear-facing camera. When the device 800 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0246] Audio component 810 is configured to output and / or input audio signals. For example, audio component 810 includes a microphone (MIC) configured to receive external audio signals when device 800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 804 or transmitted via communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

[0247] Input / output interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0248] Sensor assembly 814 includes one or more sensors for providing status assessments of various aspects of device 800. For example, sensor assembly 814 may detect the on / off state of device 800, the relative positioning of components such as the display and keypad of device 800, changes in the position of device 800 or a component of device 800, the presence or absence of user contact with device 800, the orientation or acceleration / deceleration of device 800, and temperature changes of device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 814 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0249] Communication component 816 is configured to facilitate wired or wireless communication between device 800 and other devices. Device 800 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 816 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0250] In an exemplary embodiment, the apparatus 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0251] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, which can be executed by a processor 820 of the device 800 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0252] The aforementioned device can be a standalone electronic device or a part of a standalone electronic device. For example, in one embodiment, the device can be an integrated circuit (IC) or a chip, wherein the integrated circuit can be a single IC or a collection of multiple ICs. The chip can include, but is not limited to, the following types: GPU (Graphics Processing Unit), CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), and SoC (System on Chip). The aforementioned integrated circuit or chip can be used to execute executable instructions (or code) to implement the resource selection method described above. The executable instructions can be stored in the integrated circuit or chip or obtained from other devices or equipment. For example, the integrated circuit or chip includes a processor, memory, and an interface for communicating with other devices. The executable instruction can be stored in the memory, and when the executable instruction is executed by the processor, the resource selection method described above can be implemented; alternatively, the integrated circuit or chip can receive the executable instruction through the interface and transmit it to the processor for execution, so as to implement the resource selection method described above.

[0253] In another exemplary embodiment, a computer program product is also provided, the computer program product comprising a computer program executable by a programmable device, the computer program having a code portion for performing the resource selection method described above when executed by the programmable device.

[0254] Figure 14 This is a block diagram illustrating a base station 1900 according to an exemplary embodiment. For example, the device 1900 may be provided as a base station. (Refer to...) Figure 14 The base station 1900 includes a processing component 1922, which further includes one or more processors, and memory resources represented by memory 1932 for storing instructions, such as application programs, that can be executed by the processing component 1922. The application programs stored in memory 1932 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 1922 is configured to execute instructions to perform the resource selection method described above.

[0255] The device 1900 may also include a power supply component 1926 configured to perform power management of the device 1900, a wired or wireless network interface 1950 configured to connect the device 1900 to a network, and an input / output interface 1958.

[0256] This disclosure also provides a communication system including a remote UE, a peer UE of the remote UE, and a relay UE, wherein the remote UE and the peer UE are each other's remote UEs. The remote UE and the relay UE can execute the resource selection method described above.

[0257] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0258] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A resource selection method, wherein, The method is applied to user equipment, which is a remote device in a relay-side crosslink. The user equipment communicates with a base station through a relay device, and the user equipment and the relay device communicate via unicast. The method includes: The user equipment is in an offline state and sends a system information request to the relay device through pre-configured transmission resources. The system information request carries the system information identifier of the request, and the pre-configured transmission resources are resource parameters in the time domain and frequency domain. In response to receiving system information from the relay device indicating that the system information identified by the system information identifier does not contain a transmission resource pool, the pre-configured transmission resources are used to perform side link transmission; The user equipment is determined to be connected to the base station through the relay device if the user equipment meets the following conditions: the user equipment is configured with a direct link and an indirect link, the indirect link is used as the main link, the indirect link is the link through which the user equipment communicates with the base station via the relay device, and the main link is the main link for radio signaling bearer. The indirect link shall be designated as the primary link if any of the following conditions are met: In the event of a failure of the indirect link connection, the reconfiguration information of the base station is triggered; The indirect link is a path used to maintain the connection between the user equipment and the base station; The indirect link connects to the primary cell of the user equipment.

2. The resource selection method according to claim 1, wherein, The system information transmitted by the relay device is obtained from the base station to which the relay device is connected.

3. The resource selection method according to claim 1, wherein, In response to the absence of a transmission resource pool in the system information, sidelink transmission is performed using pre-configured transmission resources, including: If the sending resource pool is not found in the system information, the system enters the connection state. Request transmission resources from the base station according to the pre-configured transmission resources; Receive a reconfiguration message returned by the base station, the reconfiguration message carrying the transmission resources or transmission resource pool returned by the base station.

4. The resource selection method according to claim 1, wherein, The method further includes: Upon receiving the transmission resources or transmission resource pool returned by the base station, the use of the pre-configured transmission resources shall be stopped.

5. The resource selection method according to claim 1, wherein, In response to the absence of a transmission resource pool in the system information, sidelink transmission is performed using pre-configured transmission resources, including: In response to the absence of a general transmission resource pool and a special transmission resource pool in the system information, the pre-configured transmission resources are used for side link transmission.

6. The resource selection method according to claim 1, wherein, The method further includes: If a general transmission resource pool exists in the system information, side link transmission is performed according to the general transmission resource pool; If the general transmission resource pool is not present in the system information, but a special transmission resource pool exists, side link transmission is performed according to the special transmission resource pool.

7. The resource selection method according to any one of claims 1 to 6, wherein, The transmission resource pool is a relay-side link transmission resource pool, and the transmission resources are relay-side link transmission resources.

8. A resource selection method, wherein, Applied to a base station, the method includes: A side-link reception is performed to obtain a resource request from a user equipment (UE). The UE is a remote device in the relay side-link, communicating with the base station via a relay device. Communication between the UE and the relay device is via unicast. The resource request is initiated when the UE, in an offline state, sends a system information request carrying a system information identifier to the relay device using pre-configured transmission resources. If the system information received from the relay device, determined based on the system information identifier, does not contain a transmission resource pool, the UE sends the request using the pre-configured transmission resources, which are time-domain and frequency-domain resource parameters. The user equipment is determined to be connected to the base station through the relay device if the user equipment meets the following conditions: the user equipment is configured with a direct link and an indirect link, the indirect link is used as the main link, the indirect link is the link through which the user equipment communicates with the base station via the relay device, and the main link is the main link for radio signaling bearer. The indirect link shall be designated as the primary link if any of the following conditions are met: In the event of a failure of the indirect link connection, the reconfiguration information of the base station is triggered; The indirect link is a path used to maintain the connection between the user equipment and the base station; The indirect link connects to the primary cell of the user equipment.

9. The resource selection method according to claim 8, wherein, The resource request is sent by the user equipment to the base station using the pre-configured transmission resources when the transmission resource pool is not present in the system information of the base station of the relay equipment.

10. The resource selection method according to claim 8, wherein, The step of receiving data via the side link to obtain resource requests from user equipment includes: Perform side link reception to obtain the resource request sent by the user equipment after it enters the connected state using the pre-configured transmission resources; A reconfiguration message is returned to the user equipment, the reconfiguration message carrying the transmission resources or transmission resource pool returned by the base station.

11. The resource selection method according to claim 8, wherein, The method further includes: The system returns the transmission resources or the transmission resource pool to the user equipment, so that the user equipment can stop using the pre-configured transmission resources.

12. The resource selection method according to claim 8, wherein, The step of receiving data via the side link to obtain resource requests from user equipment includes: If neither a general transmission resource pool nor a special transmission resource pool exists in the system information, side link reception is performed to obtain the resource request of the user equipment.

13. The resource selection method according to claim 8, wherein, The method further includes: If a general transmission resource pool exists in the system information, the system receives resource requests sent by the user equipment based on the general transmission resource pool. If the general transmission resource pool is not present in the system information, but a special transmission resource pool exists, the system receives the resource request sent by the user equipment based on the special transmission resource pool.

14. The resource selection method according to any one of claims 8 to 13, wherein, The transmission resource pool is the relay-side link transmission resource pool, and the transmission resources are the relay-side link transmission resources.

15. The resource selection method according to claim 8, wherein, The method further includes: The system information is sent to the user equipment.

16. A resource selection device, wherein, Applied to user equipment, wherein the user equipment is a remote device in a relay-side crosslink, the user equipment communicates with the base station through a relay device, and the user equipment and the relay device communicate via unicast; including: The resource request sending module is configured such that when the user equipment is in an offline state, it sends a system information request to the relay device through pre-configured sending resources, the system information request carrying a requested system information identifier; in response to receiving a system information sent by the relay device that the system information determined based on the system information identifier does not contain a sending resource pool, it uses the pre-configured sending resources to perform sidelink transmission, the pre-configured sending resources being resource parameters in the time domain and frequency domain; The user equipment is determined to be connected to the base station through the relay device if the user equipment meets the following conditions: the user equipment is configured with a direct link and an indirect link, the indirect link is used as the main link, the indirect link is the link through which the user equipment communicates with the base station via the relay device, and the main link is the main link for radio signaling bearer. The indirect link shall be designated as the primary link if any of the following conditions are met: In the event of a failure of the indirect link connection, the reconfiguration information of the base station is triggered; The indirect link is a path used to maintain the connection between the user equipment and the base station; The indirect link connects to the primary cell of the user equipment.

17. A resource selection device, wherein, Applied to base stations, including: The resource request receiving module is configured to receive resource requests from user equipment (UEs) via a side-link, wherein the UE is a remote device in the relay side-link, and the UE communicates with the base station through a relay device via unicast communication. The resource request is sent by the UE in an offline state to the relay device using pre-configured transmission resources, carrying a system information identifier. If the system information received from the relay device, determined based on the system information identifier, does not contain a transmission resource pool, the UE sends the request using the pre-configured transmission resources, which are time-domain and frequency-domain resource parameters. The user equipment is determined to be connected to the base station through the relay device if the user equipment meets the following conditions: the user equipment is configured with a direct link and an indirect link, the indirect link is used as the main link, the indirect link is the link through which the user equipment communicates with the base station via the relay device, and the main link is the main link for radio signaling bearer. The indirect link shall be designated as the primary link if any of the following conditions are met: In the event of a failure of the indirect link connection, the reconfiguration information of the base station is triggered; The indirect link is a path used to maintain the connection between the user equipment and the base station; The indirect link connects to the primary cell of the user equipment.

18. A user equipment, wherein, include: processor; Memory used to store processor-executable instructions; The processor is configured to implement the steps of the method according to any one of claims 1 to 7 when executing the executable instructions.

19. A base station, wherein, include: processor; Memory used to store processor-executable instructions; The processor is configured to implement the steps of the method according to any one of claims 8 to 15 when executing the executable instructions.

20. A computer-readable storage medium having stored thereon computer program instructions, wherein, When executed by a processor, the program instructions implement the steps of the method according to any one of claims 1 to 7, or the steps of the method according to any one of claims 8 to 15.

21. A chip, wherein, It includes a processor and an interface; the processor is configured to read instructions to perform the steps of the method according to any one of claims 1 to 7, or to perform the steps of the method according to any one of claims 8 to 15.

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