Method for controlling transmission of relay device information and apparatus therefor

Abstract

The embodiment of the present application discloses a method and device for controlling information transmission of a relay device, which can be applied in a communication system. The method comprises: a communication device sending indication information to a relay device, the indication information being used for indicating a state parameter of a remote device and instructing the relay device to determine whether to send system information to the remote device according to the state parameter of the remote device. In the embodiment of the present application, the indication information can be used to indicate whether the relay device sends system information to the remote device, thereby avoiding signaling overhead caused by unnecessary sending of system information.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a method and apparatus for controlling the information transmission of relay equipment. Background Technology

[0002] To support direct communication between terminal equipment (also known as user equipment, UE) and other UEs, a sidelink communication method was introduced. The interface between UEs is PC-5. A UE can communicate with network equipment (such as a base station) without directly connecting to it, but through another UE as a relay. The UE not connected to the network equipment is called a remote UE, and the UE providing relay functionality is called a relay UE. The remote UE and the relay UE communicate through the sidelink. This architecture is called U2N (UE to NW, terminal equipment to network) relay.

[0003] When a multipath transmission is configured on a remote device, there may be situations where the relay device does not need to send system information to the remote device, but it still sends system information to the remote device, which will lead to an increase in signaling overhead. Summary of the Invention

[0004] This application provides a method and apparatus for controlling the transmission of information by a relay device. By using instruction information, the relay device can be controlled to send system information to a remote device, thereby avoiding the signaling overhead caused when system information is sent even when it is not necessary.

[0005] In a first aspect, embodiments of this application provide a method for controlling the transmission of information by a relay device, the method comprising:

[0006] Send indication information to the relay device, the indication information being used to indicate the status parameters of the remote device, and instruct the relay device to determine whether to send system information to the remote device based on the status parameters of the remote device.

[0007] In this embodiment, the communication device sends indication information to the relay device. This indication information is used to indicate the status parameters of the remote device and instructs the relay device to determine whether to send system information to the remote device based on the status parameters of the remote device. The indication information can instruct the relay device not to send system information to the remote device, thereby avoiding signaling overhead caused by unnecessary transmission of system information.

[0008] Secondly, embodiments of this application provide another method for controlling the transmission of information by a relay device, the method comprising:

[0009] Receive indication information sent by the communication device, the indication information being used to indicate the status parameters of the remote device;

[0010] Based on the status information in the instruction information, determine whether to send system information to the remote device.

[0011] In this embodiment, the relay device receives indication information sent by the communication device. This indication information is used to indicate the status parameters of the remote device. Based on the status parameters in the indication information, the relay device determines whether to send system information to the remote device. The indication information can instruct the relay device not to send system information to the remote device, thereby avoiding signaling overhead caused by unnecessary transmission of system information.

[0012] Thirdly, embodiments of this application provide a communication device that implements some or all of the functions of the terminal device described in the first aspect above. For example, the communication device may have the functions of some or all of the embodiments in this application, or it may have the functions of any one embodiment in this application implemented individually. The functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0013] In one implementation, the communication device may include a transceiver module and a processing module, the processing module being configured to support the communication device in performing the corresponding functions described in the above method. The transceiver module supports communication between the communication device and other devices. The communication device may also include a storage module, coupled to the transceiver module and the processing module, which stores necessary computer programs and data for the communication device.

[0014] Fourthly, embodiments of this application provide another communication device that implements some or all of the functions of the network device in the method example described in the second aspect above. For example, the communication device may have the functions of some or all of the embodiments in this application, or it may have the functions of any one embodiment in this application implemented individually. The functions may be implemented by hardware or by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

[0015] In one implementation, the communication device may include a transceiver module and a processing module, the processing module being configured to support the communication device in performing the corresponding functions described in the above method. The transceiver module is used to support communication between the communication device and other devices. The communication device may also include a storage module, which is coupled to the transceiver module and the processing module, and stores the necessary computer programs and data of the communication device.

[0016] Fifthly, embodiments of this application provide a communication device including a processor, which executes the method described in the first aspect when it calls a computer program in memory.

[0017] In a sixth aspect, embodiments of this application provide a communication device including a processor that, when the processor invokes a computer program in memory, executes the method described in the second aspect above.

[0018] In a seventh aspect, embodiments of this application provide a communication device, which includes a processor and a memory, wherein the memory stores a computer program; the processor executes the computer program stored in the memory to cause the communication device to perform the method described in the first aspect above.

[0019] Eighthly, embodiments of this application provide a communication device including a processor and a memory, the memory storing a computer program; the processor executes the computer program stored in the memory to cause the communication device to perform the method described in the second aspect above.

[0020] Ninthly, embodiments of this application provide a communication device, the device including a processor and an interface circuit, the interface circuit being used to receive code instructions and transmit them to the processor, the processor being used to execute the code instructions to cause the device to perform the method described in the first aspect above.

[0021] In a tenth aspect, embodiments of this application provide a communication device including a processor and an interface circuit. The interface circuit is used to receive code instructions and transmit them to the processor, which is used to execute the code instructions to cause the device to perform the method described in the second aspect above.

[0022] Eleventhly, embodiments of this application provide a communication system, which includes the communication device described in the third aspect and the communication device described in the fourth aspect, or the system includes the communication device described in the fifth aspect and the communication device described in the sixth aspect, or the system includes the communication device described in the seventh aspect and the communication device described in the eighth aspect, or the system includes the communication device described in the ninth aspect and the communication device described in the tenth aspect.

[0023] In a twelfth aspect, embodiments of the present invention provide a computer-readable storage medium for storing instructions for use by the aforementioned terminal device, which, when executed, cause the terminal device to perform the method described in the first aspect.

[0024] In a thirteenth aspect, embodiments of the present invention provide a readable storage medium for storing instructions for use by the network device described above, which, when executed, cause the network device to perform the method described in the second aspect above.

[0025] In a fourteenth aspect, this application also provides a computer program product including a computer program that, when run on a computer, causes the computer to perform the method described in the first aspect above.

[0026] In a fifteenth aspect, this application also provides a computer program product including a computer program, which, when run on a computer, causes the computer to perform the method described in the second aspect above.

[0027] In a sixteenth aspect, this application provides a chip system including at least one processor and an interface for supporting a terminal device in implementing the functions involved in the first aspect, such as determining or processing at least one of the data and information involved in the above methods. In one possible design, the chip system further includes a memory for storing computer programs and data necessary for the terminal device. The chip system may be composed of chips or may include chips and other discrete devices.

[0028] In a seventeenth aspect, this application provides a chip system including at least one processor and an interface for supporting a network device in implementing the functions involved in the second aspect, such as determining or processing at least one of the data and information involved in the above methods. In one possible design, the chip system further includes a memory for storing computer programs and data necessary for the network device. The chip system may be composed of chips or may include chips and other discrete devices.

[0029] In an eighteenth aspect, this application provides a computer program that, when run on a computer, causes the computer to perform the method described in the first aspect above.

[0030] In a nineteenth aspect, this application provides a computer program that, when run on a computer, causes the computer to perform the method described in the second aspect above. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application or the background art will be described below.

[0032] Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of this application;

[0033] Figure 2 This is a flowchart illustrating a method for controlling the transmission of information by a relay device, as provided in an embodiment of this application.

[0034] Figure 3This is a flowchart illustrating another method for controlling the transmission of information by a relay device provided in an embodiment of this application;

[0035] Figure 4 This is a flowchart illustrating another method for controlling the transmission of information by a relay device provided in an embodiment of this application;

[0036] Figure 5 This is a flowchart illustrating another method for controlling the transmission of information by a relay device provided in an embodiment of this application;

[0037] Figure 6 This is a flowchart illustrating another method for controlling the transmission of information by a relay device provided in an embodiment of this application;

[0038] Figure 7 This is a flowchart illustrating another method for controlling the transmission of information by a relay device provided in an embodiment of this application;

[0039] Figure 8 This is a flowchart illustrating another method for controlling the transmission of information by a relay device provided in an embodiment of this application;

[0040] Figure 9 This is a flowchart illustrating another method for controlling the transmission of information by a relay device provided in an embodiment of this application;

[0041] Figure 10 This is a flowchart illustrating another method for controlling the transmission of information by a relay device provided in an embodiment of this application;

[0042] Figure 11 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0043] Figure 12 This is a schematic diagram of the structure of a communication device provided in an embodiment of this application;

[0044] Figure 13 This is a schematic diagram of the structure of a chip provided in an embodiment of this application. Detailed Implementation

[0045] 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.

[0046] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. The singular forms “a” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0047] It should be understood that although the terms first, second, third, etc., may be used to describe various information in embodiments of this disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of embodiments of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein can be interpreted as "when," "when," or "in response to a determination." For the purpose of brevity and ease of understanding, the terms "greater than" or "less than," "higher than," or "lower than" are used herein to characterize size relationships. However, it will be understood by those skilled in the art that the term "greater than" also encompasses the meaning of "greater than or equal to," and "less than" also encompasses the meaning of "less than or equal to"; the term "higher than" also encompasses the meaning of "higher than or equal to," and "lower than" also encompasses the meaning of "lower than or equal to."

[0048] To facilitate understanding, the terminology used in this application will be introduced first.

[0049] In device-to-network (UE to NW, U2N) relay scenarios, remote devices can communicate with the base station without a direct connection, instead using a relay device. For example, UE A can communicate with the base station through another UE B, acting as a relay. UE A, which is not directly connected to the base station, is called the remote UE, while UE B, which provides relay functionality, is called the relay UE. The remote UE and the relay UE communicate via sidelink unicast. A direct connection between the UE and the base station is called a direct link, while a connection via a relay UE is called an indirect link.

[0050] In device-to-device (UE to UE, U2U) relay scenarios, remote devices can communicate with another device via a sidelink, or they can communicate with each other via a relay device. For example, UE A can connect to UE B without directly connecting to UE B, but instead connect through a relay device like UE C. Here, UE A and UE C are remote UEs, UE B, which provides the relay function, is the relay UE, and all UEs communicate with each other via unicast through the sidelink. When UE A maintains a direct unicast connection with UE B, it is called a direct sidelink; when UE A maintains a unicast connection with UE B through a relay UE, it is called an indirect sidelink.

[0051] To better understand the method for controlling the transmission of information by a relay device disclosed in the embodiments of this application, the communication system to which the embodiments of this application are applicable is described below.

[0052] Please see Figure 1 , Figure 1 This is a schematic diagram of the architecture of a communication system provided in an embodiment of the present disclosure. The communication system may include, but is not limited to, one network device and two terminal devices. Figure 1 The number and form of devices shown are for illustrative purposes only and do not constitute a limitation on the embodiments of this disclosure. In actual applications, two or more network devices may be included. Figure 1 The communication system shown is exemplified by a network device 101 and two terminal devices UE (such as a first terminal device 102 and a second terminal device 103).

[0053] It is worth noting that, in Figure 1 In the wireless communication system shown, the first terminal device 102 and the second terminal device 103 communicate via a Sidelink direct link. In some embodiments, the first terminal device 102 may not be directly connected to the network device 101 but may communicate with the network device 101 through the relay of the second terminal device 103. In this embodiment, the first terminal device 102, which is not connected to the network device 101, is called the remote UE, and the second terminal device 103, which provides the relay function, is called the relay UE. The remote UE and the relay UE communicate via Sidelink unicast. This architecture is called U2N (UE to NW, terminal device to network) relay.

[0054] In some implementations, the first terminal device 102 and the network device 101 can establish both a direct link and an indirect link. A direct link is a link directly connecting the first terminal device 102 and the network device 101, while an indirect link is a link indirectly connecting the first terminal device 102 and the network device 101 via a second terminal device 103. It should be noted that the first terminal device 102 acts as the remote UE, and the second terminal device 103 acts as a relay UE. This allows the remote UE to maintain a connection with the network device simultaneously through both direct and indirect links. This functionality is called multipath connection, which enables the remote UE to support multipath transmission, thereby improving transmission rate and reliability. It should be noted that the remote UE must be in a connected state to support multipath connection.

[0055] It should also be noted that the first terminal device 102 acts as the remote UE, and the second terminal device 103 acts as the relay UE. The bearer of the remote UE can be transmitted only through a direct path (direct bearer), only through an indirect path (indirect bearer), or simultaneously through both direct and indirect paths (multipath bearer). The cell directly connected to the remote UE and the cell connected to the relay UE can be the same or different.

[0056] It should be noted that the technical solutions of this application embodiment can be applied to various communication systems. For example, Long Term Evolution (LTE) systems, 5th Generation (5G) mobile communication systems, 5G New Radio (NR) systems, or other future new mobile communication systems. It should also be noted that the side link in this application embodiment can also be called a side link or a direct link.

[0057] The network device 101 in this embodiment is a network-side entity used for transmitting or receiving signals. For example, the network device 101 can be an evolved NodeB (eNB), a Transmission Reception Point (TRP), a next-generation NodeB (gNB) in an NR system, a base station in other future mobile communication systems, or an access node in a Wireless Fidelity (WiFi) system. This embodiment does not limit the specific technology or device form used in the network device. The network device provided in this embodiment can be composed of a Central Unit (CU) and a Distributed Unit (DU). The CU can also be called a Control Unit. Using a CU-DU structure allows the protocol layer of a network device, such as a base station, to be separated. Some protocol layer functions are centrally controlled by the CU, while the remaining or all protocol layer functions are distributed in the DU, which is centrally controlled by the CU.

[0058] The terminal device 102 in this application embodiment is a user-side entity used to receive or transmit signals, such as a mobile phone. The terminal device can also be called a terminal, user equipment (UE), mobile station (MS), mobile terminal (MT), etc. The terminal device can be a car with communication capabilities, a smart car, a mobile phone, a wearable device, a tablet computer, a computer with wireless transceiver capabilities, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical surgery, a wireless terminal device in a smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, a wireless terminal device in a smart home, etc. The embodiments of this application do not limit the specific technology or device form used in the terminal device.

[0059] In sidelink communication, there are four sidelink transmission modes. Sidelink transmission mode 1 and sidelink transmission mode 2 are used for device-to-device (D2D) communication. Sidelink transmission modes 3 and 4 are used for V2X communication. When sidelink transmission mode 3 is used, resource allocation is scheduled by network device 101. Specifically, network device 101 can send resource allocation information to terminal device 102, and then terminal device 102 can allocate resources to another terminal device so that the other terminal device can send information to network device 101 through the allocated resources. In V2X communication, a terminal device with a better signal or higher reliability can be used as terminal device 102. The first terminal device mentioned in this embodiment can refer to terminal device 102, and the second terminal device can refer to the other terminal device.

[0060] It is understood that the communication system described in the embodiments of this application is for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and does not constitute a limitation on the technical solutions provided in the embodiments of this application. As those skilled in the art will know, with the evolution of system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.

[0061] It should be noted that the method for controlling the transmission of relay device information provided in any embodiment of this application can be executed alone, or can be executed together with possible implementation methods in other embodiments, or can be executed together with any technical solution in related technologies.

[0062] The method and apparatus for transmitting control relay equipment information provided in this application will be described in detail below with reference to the accompanying drawings.

[0063] Please refer to Figure 2 , Figure 2 This is a flowchart illustrating a method for controlling the transmission of information by a relay device, as provided in an embodiment of this application. This method is executed by a communication device and may include, but is not limited to, the following steps:

[0064] S201, send indication information to the relay device. The indication information is used to indicate the status parameters of the remote device and to instruct the relay device to determine whether to send system information to the remote device based on the status parameters of the remote device.

[0065] In this embodiment, the relay device can be a relay device in a U2N relay scenario or a relay device in a device-to-device U2U relay scenario.

[0066] It should be noted that, in order to improve transmission speed and reliability, remote devices can maintain a connection to the network simultaneously through both direct and indirect links. This functionality is called multipath transmission or multipath connection. Understandably, the remote device must be in a connected state to support multipath transmission.

[0067] In multipath transmission scenarios, remote devices can include a primary path and a secondary path. That is, in multipath transmission, one of the direct links and one of the indirect links can be the primary path, and the other can be the secondary path.

[0068] With multipath transmission configured on the remote device, the remote device can directly obtain system information from network devices such as base stations, and correspondingly, the relay device does not need to send system information to the remote device. Furthermore, if the cell connected to the remote device via the primary path is different from the cell connected to the relay device, the relay device also does not need to send system information to the remote device. Optionally, the system information can be System Information Block 1 (SIB1).

[0069] To avoid the problem of increased signaling consumption caused by relay devices still sending system information to remote devices in the above two scenarios, in this embodiment of the application, the communication device can send indication information to the relay device to indicate whether the relay device should send system information to the remote device.

[0070] In some implementations, the indication information is used to indicate the status parameters of the remote device and instruct the relay device to determine whether to send system information to the remote device based on the remote device's status parameters. Thus, after receiving the indication information, the relay device can determine the status parameters of the remote device and whether the remote device meets the set condition for not sending system information. If the set condition is met, the relay device may not send system information to the remote device; if the set condition is not met, the relay device may send system information to the remote device. Optionally, the set condition may include one of the following conditions:

[0071] The remote device is configured with multi-path transmission;

[0072] Remote devices are configured with multi-path bearers;

[0073] The remote device is configured with multi-path transmission and indirect links as secondary paths; and

[0074] The remote device is configured with multi-path transmission, with indirect path as the secondary path, and the first serving cell of the remote device is different from the second serving cell of the relay device.

[0075] It should be noted that the first serving cell of the remote device is the cell that the remote device is currently connected to, and the second serving cell of the relay device is the cell that the relay device is currently connected to. Optionally, the first serving cell of the remote device and the second serving cell of the relay device can be the same or different. The first and second serving cells can be primary cells (Pcells).

[0076] In this embodiment, the communication device sends indication information to the relay device. This indication information indicates the status parameters of the remote device and instructs the relay device to determine whether to send system information to the remote device based on these parameters. By instructing the relay device not to send system information to the remote device when certain conditions are met, the signaling overhead caused by unnecessary system information transmission can be avoided.

[0077] In the above embodiments, the communication device can be a remote device or a network-side device. The following embodiments will be specifically described using two examples, one for a remote device and the other for a network-side device.

[0078] Please refer to Figure 3 , Figure 3 This is a flowchart illustrating a method for controlling the transmission of information by a relay device, as provided in an embodiment of this application. This method is executed by a remote device and may include, but is not limited to, the following steps:

[0079] S301, the remote device sends an indication message to the relay device. The indication message is used to indicate the status parameters of the remote device and to instruct the relay device to determine whether to send system information to the remote device based on the status parameters of the remote device.

[0080] In this embodiment of the application, the indication information may include at least one of the following status parameters: multipath indication information, multipath bearer indication information, path type indication information of the indirect link of the remote device, and the identifier of the first serving cell of the remote device when the primary path of the remote device is a direct link.

[0081] Optionally, if the indication information includes multiple status parameters, the multiple status parameters can be sent to the relay device individually or together.

[0082] Optionally, the multipath indication information can indicate to the relay device whether the remote device has configured multipath transmission. In some implementations, the remote device sends the multipath indication information to the relay device when it determines that it has configured multipath transmission.

[0083] The bearer of a remote device can be transmitted through a direct link, called a direct bearer; it can be transmitted through an indirect link, called an indirect bearer; or it can be transmitted through both direct and indirect links, called a multipath bearer.

[0084] Optionally, the multipath bearer indication information can indicate to the relay device whether the remote device has configured a multipath bearer. In some implementations, the remote device sends the multipath bearer indication information to the relay device after determining that it has configured a multipath bearer.

[0085] In multipath transmission scenarios, remote devices can include a primary path and a secondary path. That is, in multipath transmission, one of the direct links and one of the indirect links can be the primary path, and the other can be the secondary path.

[0086] Optionally, the path type indication information for the indirect link can indicate to the relay device whether the indirect link is the primary path. In some implementations, the remote device can determine the path type of its own indirect link and send the path type indication information to the relay device. In some implementations, the path type indication is often sent to the relay device after the remote device has determined whether the indirect link is the primary path, when the remote device is configured for multipath transmission. Accordingly, after receiving the path type indication information, the intermediate device can determine whether the remote device is configured for multipath transmission and whether the indirect link is the primary path.

[0087] Optionally, when the remote device determines that its primary path is a direct link, it can send the identifier of its first serving cell to the relay device. That is, the identifier of the remote device's first serving cell is sent to the relay device as an indication. In some implementations, the identifier of the first serving cell is only sent to the relay device when the remote device is configured for multipath transmission and its primary path is a direct link, and it is determined that the first serving cell of the remote device is different from the second serving cell of the relay device. Accordingly, upon receiving the identifier of the first serving cell, the intermediate device can determine that the remote device is configured for multipath transmission, that the direct link is the primary path, and that the first and second serving cells are different.

[0088] It should be noted that, when the primary path of the remote device is determined to be a direct link, the remote device can determine whether its own first serving cell is the same as the second serving cell of the relay device. If the first and second serving cells are different, the remote device can send the identifier of the first serving cell to the relay device. If the first and second serving cells are different, the remote device may choose not to send the identifier of the first serving cell to the relay device. Accordingly, if the relay device, based on the indication information, determines that the primary path of the remote device is a direct link but has not received the identifier of the first serving cell, it can then determine that the first and second serving cells are the same.

[0089] Optionally, when the remote device determines that the indirect link is a secondary path, it sends a system information release request indication to the relay device. In some implementations, the system information release request indication can be an sl-RequestedSIB-List, which is carried in the RemoteUEInformationSidelink message.

[0090] Optionally, the remote device can determine the path used to transmit the Signaling Radio Bearer (SRB) as the primary path.

[0091] Optionally, the remote device may determine the path that is triggered by the remote device to rebuild the Radio Resource Control (RRC) connection when the path fails as the primary path.

[0092] Optionally, the remote device can determine the main transmission path of the SRB as the primary path.

[0093] Optionally, the remote device can determine the path used to maintain the RRC connection as the primary path.

[0094] Optionally, the anchor path can be designated as the main path.

[0095] Optionally, the path of the primary cell PCell connecting to the remote device can be determined as the primary path.

[0096] In other words, the primary path determined by the remote device can be any of the following paths:

[0097] The path used to transmit radio signaling bearers (SRBs);

[0098] The path for re-establishing a radio control resource (RRC) connection is triggered by the remote device when the path fails;

[0099] The main transmission path of SRB;

[0100] The path used to maintain the RRC connection;

[0101] Anchor point path;

[0102] The path connecting the primary cell PCell of the remote device.

[0103] It is understandable that if the remote device determines that any of the above paths is not the primary path, it can designate any of the above paths as a secondary path. In other words, the secondary path can also be any of the above paths.

[0104] To avoid the problem of increased signaling consumption caused by relay devices still sending system information to remote devices in the above two scenarios, in this embodiment of the application, the communication device can send indication information to the relay device to indicate whether the relay device should send system information to the remote device.

[0105] S302, the relay device determines whether to send system information to the remote device based on the status parameters in the indication information.

[0106] In some implementations, the indication information is used to indicate the status parameters of the remote device and instruct the relay device to determine whether to send system information to the remote device based on the remote device's status parameters. Thus, after receiving the indication information, the relay device can determine the status parameters of the remote device and whether the remote device meets the set conditions for not sending system information. If the set conditions are met, the relay device can choose not to send system information to the remote device; otherwise, the relay device can send system information to the remote device.

[0107] In some implementations, the indication information is used to indicate the status parameters of the remote device and instruct the relay device to determine whether to send system information to the remote device based on the remote device's status parameters. Thus, after receiving the indication information, the relay device can determine the status parameters of the remote device and whether the remote device meets the set conditions for not sending system information. If the set conditions are met, the relay device can choose not to send system information to the remote device; otherwise, the relay device can send system information to the remote device.

[0108] Optionally, the setting conditions may include one of the following conditions:

[0109] The remote device is configured with multi-path transmission;

[0110] Remote devices are configured with multi-path bearers;

[0111] The remote device is configured with multi-path transmission and indirect links as secondary paths; and

[0112] The remote device is configured with multi-path transmission, with indirect path as the secondary path, and the first serving cell of the remote device is different from the second serving cell of the relay device.

[0113] In this embodiment, the remote device sends indication information to the relay device. This indication information indicates the status parameters of the remote device, and the relay device determines whether to send system information to the remote device based on these parameters. This indication information can instruct the relay device not to send system information to the remote device, thereby avoiding signaling overhead caused by unnecessary transmission of system information.

[0114] Please refer to Figure 4 , Figure 4 This is a flowchart illustrating a method for controlling the transmission of information by a relay device, as provided in an embodiment of this application. This method is executed by a network device and may include, but is not limited to, the following steps:

[0115] S401, the network device sends an indication message to the relay device. The indication message is used to indicate the status parameters of the remote device and to instruct the relay device to determine whether to send system information to the remote device based on the status parameters of the remote device.

[0116] The process of a network device sending an instruction message to a relay device is similar to the process of a remote device sending an instruction message to a relay device. Please refer to the relevant descriptions in the above embodiments, such as the descriptions of steps 201 or 301, which will not be repeated here.

[0117] S402, the relay device determines whether to send system information to the remote device based on the status parameters in the indication information.

[0118] The relay device can receive indication information and determine whether the remote device meets the set conditions for not sending system information based on the indication information. If the set conditions are met, the relay device may not send system information to the remote device. If the set conditions are not met, the relay device may send system information to the remote device. The set conditions can be found in the descriptions of the relevant content in the above embodiments, for example... Figure 2 Or such as Figure 3 The embodiments shown are not described in detail here.

[0119] In this embodiment, the network device sends indication information to the relay device. This indication information is used by the relay device to determine whether to send system information to the remote device. The indication information controls the relay device to send system information to the remote device, thereby avoiding signaling overhead caused by sending system information when it is unnecessary.

[0120] Please refer to Figure 5 , Figure 5This is a flowchart illustrating a method for controlling the transmission of information by a relay device, provided in an embodiment of this application. The method is executed by the relay device and may include, but is not limited to, the following steps:

[0121] S501 receives indication information, which is used to indicate the status parameters of the remote device.

[0122] In this embodiment, the relay device can be a relay device in a U2N relay scenario or a relay device in a device-to-device (U2U) relay scenario. The remote device can maintain a connection with the network simultaneously through both direct and indirect links; this function is called multipath transmission or multipath connection.

[0123] In some implementations, the indication information is used to indicate the status parameters of the remote device, and the relay device determines whether to send system information to the remote device based on the status parameters of the remote device. Thus, after receiving the indication information, the relay device can determine the status parameters of the remote device and whether the remote device meets the set conditions for not sending system information. If the set conditions are met, the relay device may not send system information to the remote device; if the set conditions are not met, the relay device may send system information to the remote device.

[0124] To avoid increased signaling consumption caused by relay devices sending system information to remote devices even when no system information needs to be sent, in this embodiment, the relay device can receive indication information sent by a communication device. This communication device can be a remote device or a network device.

[0125] In this embodiment of the application, the indication information may include at least one of the following status parameters: multipath indication information, multipath bearer indication information, path type indication information of the indirect link of the remote device, identifier of the first serving cell of the remote device when the primary path of the remote device is a direct link, and release request indication of system information. The release request indication of system information may be sent by the communication device when the indirect link of the remote device is a secondary path.

[0126] Optionally, the multipath indication information can indicate to the relay device whether the remote device has configured multipath transmission. In some implementations, the relay device can receive multipath indication information sent by the remote device when it determines that it has configured multipath transmission.

[0127] Optionally, the multipath bearer indication information can indicate to the relay device whether the remote device has configured a multipath bearer. In some implementations, the relay device can receive multipath bearer indication information sent by the communication device when it has configured a multipath bearer.

[0128] Optionally, the path type indication information for the indirect link can indicate to the relay device whether the indirect link is the primary path. In some implementations, the remote device can determine the path type of its own indirect link, and the relay device can receive the path type indication information for the remote device's indirect link sent by the communication device. In some implementations, the path type indication is often sent to the relay device after the remote device has determined whether the indirect link is the primary path, when the remote device is configured for multipath transmission. Accordingly, after receiving the path type indication information, the intermediate device can determine whether the remote device is configured for multipath transmission and whether the indirect link is the primary path. Optionally, when the remote device can determine that its primary path is a direct link, it can send the identifier of its first serving cell to the relay device. Accordingly, the relay device can receive the identifier of the first serving cell sent by the remote device when the primary path is a direct path. That is, the identifier of the remote device's first serving cell is sent to the relay device as indication information. In some implementations, the identifier of the first serving cell is sent to the relay device only when the remote device is configured with multipath transmission and the primary path is a direct link, and it is determined that the first serving cell where the remote device is located is different from the second serving cell where the relay device is located. Accordingly, after receiving the identifier of the first serving cell, the intermediate device can determine that the remote device is configured with multipath transmission and the direct link is the primary path, and that the first and second serving cells are different.

[0129] It should be noted that, when the primary path of the remote device is determined to be a direct link, the remote device can determine whether its own first serving cell is the same as the second serving cell of the relay device. If the first and second serving cells are different, the remote device can send the identifier of the first serving cell to the relay device. If the first and second serving cells are different, the remote device may choose not to send the identifier of the first serving cell to the relay device. Accordingly, if the relay device, based on the indication information, determines that the primary path of the remote device is a direct link but has not received the identifier of the first serving cell, it can then determine that the first and second serving cells are the same.

[0130] Alternatively, the primary path determined by the remote device can be any of the following paths:

[0131] The path used to transmit radio signaling bearers (SRBs);

[0132] The path for re-establishing a radio control resource (RRC) connection is triggered by the remote device when the path fails;

[0133] The main transmission path of SRB;

[0134] The path used to maintain the RRC connection;

[0135] Anchor point path;

[0136] The path connecting the primary cell PCell of the remote device.

[0137] It is understandable that if the remote device determines that any of the above paths is not the primary path, it can designate any of the above paths as a secondary path. In other words, the secondary path can also be any of the above paths.

[0138] S502 determines whether to send system information to the remote device based on the status parameters of the remote device.

[0139] In some implementations, the relay device can determine whether the remote device meets the set conditions for not sending system information based on this indication information. If the set conditions are met, the relay device may not send system information to the remote device. If the set conditions are not met, the relay device may send system information to the remote device.

[0140] Optionally, the setting conditions may include one of the following conditions:

[0141] The remote device is configured with multi-path transmission;

[0142] Remote devices are configured with multi-path bearers;

[0143] The remote device is configured with multi-path transmission and the indirect link is a secondary path;

[0144] The remote device is configured with multi-path transmission, with indirect path as the secondary path, and the first serving cell of the remote device is different from the second serving cell of the relay device.

[0145] It should be noted that the first serving cell and the second serving cell can be primary cells (Pcell).

[0146] Optionally, if the relay device receives multipath indication information and determines that the setting condition of multipath transmission configured on the remote device is met, the relay device may not send system information to the remote device; if the setting condition of multipath transmission configured on the remote device is not met, the relay device may send system information to the remote device.

[0147] Optionally, if the relay device receives the multipath bearer indication information and determines that the setting condition of the remote device being configured with multipath bearer is met, the relay device may not send system information to the remote device; if the setting condition of the remote device being configured with multipath bearer is not met, the relay device may send system information to the remote device.

[0148] Optionally, when the relay device receives the path type indication information, it can determine that the remote device is configured with multi-path transmission and the indirect link is a secondary path.

[0149] Optionally, when the relay device receives the release request information from the system information, it can determine that the remote device is configured with multi-path transmission and the indirect link is the secondary path.

[0150] Optionally, when the relay device receives the identifier of the first serving cell of the remote device, it can determine that the remote device is configured with multi-path transmission, the indirect path is the secondary path, and the first serving cell is different from the second serving cell.

[0151] It should be noted that the relay device can determine whether the remote device meets one of the above-mentioned set conditions based on one or more status parameters of the remote device included in the indication information. If one of the set conditions is met, the relay device will not send system information to the remote device.

[0152] In this embodiment, an indication message sent by a communication device is received. This indication message indicates the status parameters of a remote device, and the system determines whether to send system information to the remote device based on these status parameters. The indication message can instruct the relay device not to send system information to the remote device, thereby avoiding signaling overhead caused by unnecessary transmission of system information.

[0153] Please refer to Figure 6 , Figure 6 This is a flowchart illustrating a method for controlling the transmission of information by a relay device, provided in an embodiment of this application. The method is executed by the relay device and may include, but is not limited to, the following steps:

[0154] S601 receives indication information sent by the communication device. The indication information is used to indicate the status parameters of the remote device.

[0155] Optionally, the status parameters of the remote device included in the indication information can be multipath indication information, which can indicate whether the remote device is configured for multipath transmission.

[0156] It should be noted that when the remote device determines that it is configured for multipath transmission, it sends multipath indication information to the relay device.

[0157] S602 determines whether the remote device is configured for multipath transmission based on the status parameters of the remote device.

[0158] For example, a value of "1" indicates that the remote device is configured for multipath transmission, while a value of "0" indicates that the remote device is not configured for multipath transmission.

[0159] If it is determined that the remote device is configured for multipath transmission, proceed to step S603; if it is determined that the remote device is not configured for multipath transmission, proceed to step S604.

[0160] S603 does not send system information to remote devices.

[0161] The relay device determines that the remote device is configured for multi-path transmission, thus confirming that the remote device can directly obtain system information from network devices such as base stations. Therefore, the relay device does not need to send system information to the remote device. This system information can be SIB1.

[0162] S604 sends system information to remote devices.

[0163] If a relay device determines that a remote device is not configured for multipath transmission, it can be concluded that the remote device cannot directly obtain system information from network devices such as base stations. In this case, the relay device needs to send system information to the remote device.

[0164] In this embodiment, an indication message sent by a communication device is received, and a decision is made based on the indication message to determine whether to send system information to a remote device. The indication message allows control over the relay device to send system information to the remote device, thereby avoiding signaling overhead caused by sending system information when it is unnecessary.

[0165] Please refer to Figure 7 , Figure 7 This is a flowchart illustrating a method for controlling the transmission of information by a relay device, provided in an embodiment of this application. The method is executed by the relay device and may include, but is not limited to, the following steps:

[0166] S701 receives indication information sent by the communication device. The indication information is used to indicate the status parameters of the remote device.

[0167] S702, based on the status parameters of the remote device, determines that the remote device is configured for multipath transmission and the secondary path is an indirect link, and does not send system information to the remote device.

[0168] S703, based on the status parameters of the remote device, determines that the remote device is configured for multipath transmission and that the secondary path is an indirect link. If any of these conditions are not met, system information is sent to the remote device.

[0169] Optionally, the indication information may include path type indication information for the indirect link, which is a status parameter of the remote device. In some implementations, the path type indication is sent to the relay device after the remote device is configured with multipath transmission and determines whether the indirect link is the primary path.

[0170] When a relay device receives path type indication information for an indirect link, if the path type indication information indicates that the indirect link is not the primary path, it can determine that the indirect link is a secondary path. This confirms that the remote device is configured for multipath transmission, and since the secondary path is an indirect link, the relay device does not need to send system information to the remote device. However, if the path type indication information indicates that the indirect link is the primary path, it can determine that the remote device is configured for multipath transmission, but the secondary path does not meet the requirement of being an indirect link. In this case, the relay device can send system information to the remote device.

[0171] Optionally, a value of "1" for the path type indication information can indicate that the indirect link is the primary path, while a value of "0" for the path type indication information can indicate that the indirect link is not the primary path, i.e., it is a secondary path.

[0172] As another possible implementation, the indication information may include the remote device's status parameters as multipath indication information and / or multipath bearer indication information, as well as path type indication information for indirect links.

[0173] This multipath bearer indication information can indicate whether the remote device is configured with multipath bearer, that is, whether the remote device can support multipath transmission. It should be noted that the remote device sends the multipath bearer indication information to the relay device after determining that it is configured with multipath bearer.

[0174] Optionally, the multipath indication information can indicate whether the remote device is configured for multipath transmission. In this embodiment, the relay device can determine whether the remote device is configured for multipath transmission based on the multipath indication information and / or multipath bearer indication information.

[0175] After determining that the remote device is configured for multipath transmission, the relay device can further determine whether the secondary path of the remote device is an indirect link based on the path type indication information of the indirect link.

[0176] Optionally, the indication information may include path type indication information for indirect links, which may indicate whether the indirect link is the primary path.

[0177] In this embodiment of the application, when it is determined that the remote device is configured for multipath transmission and the secondary path is an indirect link, the remote device can directly obtain system information from the base station, and the relay device does not need to continue sending system information to the remote device.

[0178] In this embodiment of the application, if it is determined that the remote device does not meet either the configuration of multipath transmission or the secondary path being an indirect link, the remote device cannot directly obtain system information from the base station, and the relay device needs to continue sending system information to the remote device.

[0179] In this embodiment, an indication message sent by a communication device is received. This indication message indicates the status parameters of a remote device. Based on the status parameters of the remote device, it is determined whether to send system information to the remote device. The indication message can instruct the relay device not to send system information to the remote device, thereby avoiding signaling overhead caused by unnecessary transmission of system information.

[0180] Please refer to Figure 8 , Figure 8 This is a flowchart illustrating a method for controlling the transmission of information by a relay device, provided in an embodiment of this application. The method is executed by the relay device and may include, but is not limited to, the following steps:

[0181] S801 receives indication information sent by the communication device. The indication information is used to indicate the status parameters of the remote device.

[0182] S802, based on the status parameters of the remote device, determines that the remote device is configured for multipath transmission, and the secondary path is an indirect link. Furthermore, the first serving cell of the remote device is different from the second serving cell of the relay device, and does not send system information to the remote device.

[0183] S803: Based on the status parameters of the remote device, if any of the following conditions are not met: the remote device is configured for multipath transmission, the secondary path is an indirect link, or the first serving cell is different from the second serving cell, system information is sent to the remote device.

[0184] As one possible implementation, the indication information may include the identifier of the first serving cell where the remote device resides as a status parameter of the remote device. In some implementations, the identifier of the first serving cell is only sent to the relay device when the remote device is configured for multipath transmission and the primary path is a direct link, and it is determined that the first serving cell where the remote device resides is different from the second serving cell where the relay device resides. Optionally, the first serving cell of the remote device and the second serving cell of the relay device may be the same or different.

[0185] In this embodiment of the application, after receiving the identifier of the first serving cell, the intermediate device can determine that the remote device is configured with multi-path transmission and the direct link is the main path, and that the first serving cell is different from the second serving cell.

[0186] As another possible implementation, the indication information may include at least one of the following status parameters: multipath indication information, multipath bearer indication information, path type indication information of the indirect link of the remote device, and the identifier of the first serving cell of the remote device. It should be noted that when the primary path is a direct link, the remote device sends the identifier of the first serving cell to the relay device.

[0187] In this embodiment of the application, based on the status parameters of the remote device, it is determined whether the remote device is configured for multipath transmission, whether the secondary path of the remote device is an indirect link, and whether the first serving cell and the second serving cell are different.

[0188] Whether the remote device is configured with multipath transmission can be determined based on the multipath indication information and / or multipath bearer indication information. For the specific judgment process, please refer to the relevant content in S602 of the above embodiment, which will not be repeated here.

[0189] Whether the indirect link of the remote device is the main path can be determined based on the path type indication information. For the specific judgment process, please refer to the relevant content in S702 of the above embodiment, which will not be repeated here.

[0190] Furthermore, the relay device obtains the identifier of the second serving cell it is connected to. The relay device can mark the identifier of the first serving cell and the identifier of the second serving cell. If the two identifiers are different, it can be determined that the first serving cell and the second serving cell are different.

[0191] It should be noted that, when the primary path of the remote device is determined to be a direct link, the remote device can determine whether its own first serving cell is the same as the second serving cell of the relay device. If the first and second serving cells are different, the remote device can send the identifier of the first serving cell to the relay device. If the first and second serving cells are different, the remote device may choose not to send the identifier of the first serving cell to the relay device. Accordingly, if the relay device, based on the indication information, determines that the primary path of the remote device is a direct link but has not received the identifier of the first serving cell, it can then determine that the first and second serving cells are the same.

[0192] In this embodiment of the application, if it is determined that the remote device is configured with multipath transmission, the secondary path is an indirect link, and the first serving cell is different from the second serving cell of the relay device, the relay device does not need to continue sending system information to the remote device.

[0193] In this embodiment of the application, if it is determined that the remote device does not meet any of the following conditions: configured multipath transmission, the secondary path is an indirect link, and the first serving cell is different from the second serving cell, the relay device needs to continue to send system information to the remote device.

[0194] In this embodiment, an indication message sent by a communication device is received. This indication message indicates the status parameters of a remote device. Based on the status parameters of the remote device, it is determined whether to send system information to the remote device. The indication message can instruct the relay device not to send system information to the remote device, thereby avoiding signaling overhead caused by unnecessary transmission of system information.

[0195] Please refer to Figure 9 , Figure 9 This is a flowchart illustrating a method for controlling the transmission of information by a relay device, provided in an embodiment of this application. The method is executed by the relay device and may include, but is not limited to, the following steps:

[0196] S901 receives instruction information sent by the communication device.

[0197] S902, determine whether the indication information is a system information release request indication.

[0198] If the indication information is determined to be a release request indication for system information, execute S902. If the indication information is determined not to be a release request indication for system information, it can continue to determine whether the remote device is configured for multipath transmission, whether the secondary path of the remote device is an indirect link, and whether the first serving cell and the second serving cell are different.

[0199] The system information release request indication can request the relay device to release system information. It should be noted that this is sent by the remote device to the relay device when it determines that the indirect link type is a secondary path.

[0200] S903 does not send system information to remote devices.

[0201] Upon receiving a release request instruction from the remote system, it can be determined that the intermediate device does not need to send system information to the remote device.

[0202] In this embodiment, the relay device receives indication information sent by the communication device. This indication information is used to indicate the status parameters of the remote device. Based on the status parameters of the remote device, it is determined whether to send system information to the remote device. The indication information can instruct the relay device not to send system information to the remote device, thereby avoiding signaling overhead caused by unnecessary transmission of system information.

[0203] Please refer to Figure 10 , Figure 10 This is a flowchart illustrating a method for controlling the transmission of information by a relay device, provided in an embodiment of this application. The method is executed by the relay device and may include, but is not limited to, the following steps:

[0204] S1001, Receive indication information sent by the communication device, the indication information is used to indicate the status parameters of the remote device.

[0205] For a detailed description of step S1001, please refer to the relevant content in the above embodiments, which will not be repeated here.

[0206] S1002, detect the update status of system information.

[0207] S1003: When an update to the system information is detected, determine whether to send the system information to the remote device based on the instruction information.

[0208] In this embodiment of the application, the relay device can detect the update status of system information. For example, the relay device can determine that the system information has been updated when it receives new system information again.

[0209] Furthermore, the relay device can determine whether to send system information to the remote device based on the instruction information. For details, please refer to the relevant content in the above embodiments, which will not be repeated here.

[0210] In this embodiment, the relay device receives indication information sent by the communication device. This indication information is used to indicate the status parameters of the remote device. Based on the status parameters of the remote device, it is determined whether to send system information to the remote device. The indication information can instruct the relay device not to send system information to the remote device, thereby avoiding signaling overhead caused by unnecessary transmission of system information.

[0211] In the embodiments provided above, the methods provided by the embodiments of this application have been described from the perspectives of network devices and terminal devices, respectively. To implement the functions of the methods provided in the embodiments of this application, the network device and the first terminal device may include hardware structures and software modules, implementing the above functions in the form of hardware structures, software modules, or a combination of hardware structures and software modules. One of the above functions may be executed in the form of hardware structures, software modules, or a combination of hardware structures and software modules.

[0212] Please see Figure 11 This is a schematic diagram of the structure of a communication device 1100 provided in an embodiment of this application. Figure 11 The communication device 1100 shown may include a transceiver module 1101 and a processing module 1102. The transceiver module 1101 may include a sending module and / or a receiving module. The sending module is used to implement the sending function, and the receiving module is used to implement the receiving function. The transceiver module 1101 can implement the sending function and / or the receiving function.

[0213] The communication device 1100 can be a terminal device, a device within a terminal device, or a device that can be used in conjunction with a terminal device. Alternatively, the communication device 1100 can be a network device, a device within a network device, or a device that can be used in conjunction with a network device.

[0214] The communication device 1100 can be a remote device as described in the above embodiments, or it can be a network device as described in the above embodiments.

[0215] The transceiver module 1101 is used to send indication information to the relay device. The indication information is used to indicate the status parameters of the remote device and to instruct the relay device to determine whether to send system information to the remote device based on the status parameters of the remote device.

[0216] In some implementations, the transceiver module 1101 is also used for:

[0217] If it is determined that the remote device is configured for multipath transmission, multipath indication information is sent to the relay device;

[0218] If it is determined that the remote device is configured with multipath bearer, send multipath bearer indication information to the relay device;

[0219] The path type of the indirect link of the remote device is determined, and the path type indication information of the indirect link is sent to the relay device. The path type indication information is used to indicate whether the indirect link is the main path.

[0220] When the primary path of the remote device is determined to be a direct link, the identifier of the first serving cell of the remote device is sent to the relay device;

[0221] When the type of the indirect link of the remote device is determined to be a secondary path, a release request instruction for the system information is sent to the relay device.

[0222] In some implementations, processing module 1102 is used for:

[0223] If the primary path of the remote device is a direct link, determine whether the first serving cell and the second serving cell of the relay device are the same.

[0224] The transceiver module 1101 is also used to send the identifier of the first serving cell to the relay device when the first serving cell is different from the second serving cell.

[0225] In some implementations, the main path is any of the following paths:

[0226] The main path is the path used to transmit radio signaling bearers (SRBs).

[0227] The primary path is the path that the remote device triggers to rebuild the radio control resource RRC connection when the path fails;

[0228] The main path is the main transmission path of SRB;

[0229] The primary path is the path used to maintain the RRC connection;

[0230] The main path is the anchor path;

[0231] The main path connects to the main cell PCell of the remote device.

[0232] In some implementations, if any of the paths is not the primary path, it is determined to be the secondary path.

[0233] In some implementations, the communication device 1100 can be a remote device or a network device.

[0234] The communication device 1100 can be a relay device as described in the above embodiments:

[0235] The transceiver module 1101 is used to receive indication information sent by the communication device, the indication information being used to indicate the status parameters of the remote device;

[0236] The processing module 1102 is used to determine whether to send system information to the remote device based on the status parameters of the remote device.

[0237] In some implementations, the processing module 1102 is further configured to: determine, based on the status parameters of the remote device, that the remote device is configured for multipath transmission and not send the system information to the remote device; or, based on the status parameters of the remote device, determine that the remote device's multipath transmission configuration is not satisfied and send the system information to the remote device.

[0238] In some implementations, the processing module 1102 is further configured to: determine, based on the status parameters of the remote device, that the remote device is configured for multipath transmission and the secondary path of the remote device is an indirect link, and not send the system information to the remote device; or, based on the status parameters of the remote device, determine that either the remote device is configured for multipath transmission or the secondary path is an indirect link is not satisfied, and send the system information to the remote device.

[0239] In some implementations, the processing module 1102 is further configured to: determine, based on the status parameters of the remote device, that the remote device is configured for multipath transmission, and that the secondary path of the remote device is an indirect link, and that the first serving cell of the remote device is different from the second serving cell of the remote device, and not send the system information to the remote device; or, based on the status parameters of the remote device, determine that if any one of the following conditions is not met—that the remote device is configured for multipath connection, the secondary path is an indirect link, and the first serving cell is different from the second serving cell—the system information is sent to the remote device.

[0240] In some implementations, the processing module 1102 is further configured to: in response to a release request indication that the indication information is system information, determine not to send the system information to the remote device.

[0241] In some implementations, the transceiver module 1101 is also used for:

[0242] Receive multipath indication information sent by the communication device when the remote device is configured with multipath transmission;

[0243] Receive multipath bearer indication information sent by the communication device when the remote device is configured with multipath bearer;

[0244] The communication device receives path type indication information for the indirect link of the remote device, wherein the path type indication information is used to indicate whether the indirect link is a secondary primary path of the remote device.

[0245] The communication device receives the identifier of the first serving cell of the remote device when the primary path of the remote device is a direct path.

[0246] In some implementations, the identifier of the first serving cell is sent by the communication device to the relay device when it is determined that the first serving cell is different from the second serving cell of the relay device.

[0247] In some implementations, the processing module 1102 is further configured to: determine whether the remote device is configured for multipath transmission based on the multipath indication; or, determine whether the remote device is configured for multipath transmission based on the multipath bearer indication.

[0248] In some implementations, the processing module 1102 is further configured to: determine whether the secondary path is an indirect path based on the path type indication information.

[0249] In some implementations, the processing module 1102 is further configured to: determine whether the first serving cell and the second serving cell are the same based on the identifier of the first serving cell; or, in response to the indirect path being the primary path and not receiving the identifier of the first serving cell, determine that the first serving cell and the second serving cell are the same.

[0250] In some implementations, the processing module 1102 is further configured to: detect the update status of the system information;

[0251] When an update to the system information is detected, the system determines whether to send the system information to the remote device based on the indication information.

[0252] In this embodiment, the communication device sends an indication message to the relay device. This indication message is used to indicate the status parameters of the remote device. The relay device determines whether to send system information to the remote device based on the status parameters of the remote device. The indication message can instruct the relay device not to send system information to the remote device, thereby avoiding signaling overhead caused by unnecessary transmission of system information.

[0253] Please see Figure 12 , Figure 12 This is a schematic diagram of another communication device 1200 provided in an embodiment of this application. The communication device 1200 can be a network device, a terminal device, a chip, chip system, or processor that supports the implementation of the above methods in a network device, or a chip, chip system, or processor that supports the implementation of the above methods in a terminal device. This device can be used to implement the methods described in the above method embodiments; for details, please refer to the descriptions in the above method embodiments.

[0254] The communication device 1200 may include one or more processors 1201. The processor 1201 may be a general-purpose processor or a dedicated processor, such as a baseband processor or a central processing unit (CPU). The baseband processor can be used to process communication protocols and communication data, while the CPU can be used to control the communication device (e.g., base station, baseband chip, terminal equipment, terminal equipment chip, DU or CU, etc.), execute computer programs, and process data from the computer programs.

[0255] Optionally, the communication device 1200 may further include one or more memories 1202, which may store a computer program 1203. The processor 1201 executes the computer program 1203 to cause the communication device 1200 to perform the method described in the above method embodiments. Optionally, the memory 1202 may also store data. The communication device 1200 and the memory 1202 may be provided separately or integrated together.

[0256] Optionally, the communication device 1200 may also include a transceiver 1204 and an antenna 1205. The transceiver 1204 may be referred to as a transceiver unit, transceiver, or transceiver circuit, etc., and is used to implement the transmission and reception functions. The transceiver 1204 may include a receiver and a transmitter. The receiver may be referred to as a receiver or receiving circuit, etc., and is used to implement the receiving function; the transmitter may be referred to as a transmitter or transmitting circuit, etc., and is used to implement the transmitting function.

[0257] Optionally, the communication device 1200 may further include one or more interface circuits 1206. The interface circuits 1206 are used to receive code instructions and transmit them to the processor 1201. The processor 1201 executes the code instructions to cause the communication device 1200 to perform the methods described in the above method embodiments.

[0258] The communication device 1200 is a terminal device used to implement the functions of the terminal device in the aforementioned embodiments.

[0259] The communication device 1200 is a network device used to implement the functions of the network device in the aforementioned embodiments.

[0260] In one implementation, the processor 1201 may include a transceiver for implementing receiving and transmitting functions. For example, the transceiver may be a transceiver circuit, an interface, or an interface circuit. The transceiver circuit, interface, or interface circuit for implementing receiving and transmitting functions may be separate or integrated. The aforementioned transceiver circuit, interface, or interface circuit can be used for reading and writing code / data, or it can be used for transmitting or relaying signals.

[0261] In one implementation, processor 1201 may store computer program 1203, which runs on processor 1201 and causes communication device 1200 to perform the methods described in the above method embodiments. Computer program 1203 may be embedded in processor 1201, in which case processor 1201 may be implemented in hardware.

[0262] In one implementation, the communication device 1200 may include circuitry capable of performing the functions of transmitting, receiving, or communicating as described in the foregoing method embodiments. The processor and transceiver described in this application can be implemented on integrated circuits (ICs), analog ICs, radio frequency integrated circuits (RFICs), mixed-signal ICs, application-specific integrated circuits (ASICs), printed circuit boards (PCBs), electronic devices, etc. The processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal-oxide-semiconductor (CMOS), n-metal-oxide-semiconductor (NMOS), p-type metal-oxide-semiconductor (PMOS), bipolar junction transistors (BJTs), bipolar CMOS (BiCMOS), silicon-germanium (SiGe), gallium arsenide (GaAs), etc.

[0263] The communication device described in the above embodiments may be a network device or a network device, but the scope of the communication device described in this application is not limited thereto, and the structure of the communication device may vary. Figure 12 The communication device may be a standalone device or part of a larger device. For example, the communication device may be:

[0264] (1) Independent integrated circuit IC, or chip, or chip system or subsystem;

[0265] (2) A collection of one or more ICs, optionally including storage components for storing data and computer programs;

[0266] (3) ASIC, such as modem;

[0267] (4) Modules that can be embedded in other devices;

[0268] (5) Receivers, terminal equipment, smart terminal equipment, cellular phones, wireless equipment, handheld devices, mobile units, vehicle-mounted equipment, network equipment, cloud equipment, artificial intelligence equipment, etc.

[0269] (6) Others, etc.

[0270] For cases where the communication device can be a chip or a chip system, please refer to [link / reference]. Figure 13 The diagram shows the structure of the chip. Figure 13 The chip 1300 shown includes a processor 1301 and an interface 1302. The number of processors 1301 can be one or more, and the number of interfaces 1302 can be multiple.

[0271] For the case where chip 1300 is used to implement the functions of the communication devices in the embodiments of this application, such as the remote device and network device in the above embodiments:

[0272] Interface 1302 is used to send indication information to the relay device. The indication information is used to indicate the status parameters of the remote device and to instruct the relay device to determine whether to send system information to the remote device based on the status parameters of the remote device.

[0273] In some implementations, interface 1302 is also used for:

[0274] If it is determined that the remote device is configured for multipath transmission, multipath indication information is sent to the relay device;

[0275] If it is determined that the remote device is configured with multipath bearer, send multipath bearer indication information to the relay device;

[0276] The path type of the indirect link of the remote device is determined, and the path type indication information of the indirect link is sent to the relay device. The path type indication information is used to indicate whether the indirect link is the main path.

[0277] When the primary path of the remote device is determined to be a direct link, the identifier of the first serving cell of the remote device is sent to the relay device;

[0278] When the type of the indirect link of the remote device is determined to be a secondary path, a release request instruction for the system information is sent to the relay device.

[0279] In some implementations, processor 1301 is used for:

[0280] If the primary path of the remote device is a direct link, determine whether the first serving cell and the second serving cell of the relay device are the same.

[0281] Interface 1302 is also used to send the identifier of the first serving cell to the relay device when the first serving cell is different from the second serving cell.

[0282] In some implementations, the main path is any of the following paths:

[0283] The main path is the path used to transmit radio signaling bearers (SRBs).

[0284] The primary path is the path that the remote device triggers to rebuild the radio control resource RRC connection when the path fails;

[0285] The main path is the main transmission path of SRB;

[0286] The primary path is the path used to maintain the RRC connection;

[0287] The main path is the anchor path;

[0288] The main path connects to the main cell PCell of the remote device.

[0289] In some implementations, if any of the paths is not the primary path, it is determined to be the secondary path.

[0290] In some implementations, the 1300 chip can be used in remote devices or network devices.

[0291] Regarding the case where chip 1300 is used to implement the function of the relay device in the embodiments of this application:

[0292] Interface 1302 is used to receive indication information sent by a communication device, the indication information being used to indicate the status parameters of a remote device;

[0293] The processor 1301 is used to determine whether to send system information to the remote device based on the status parameters of the remote device.

[0294] In some implementations, the processor 1301 is further configured to: determine, based on the status parameters of the remote device, that the remote device is configured for multipath transmission and not send the system information to the remote device; or, based on the status parameters of the remote device, determine that the remote device's multipath transmission configuration is not satisfied and send the system information to the remote device.

[0295] In some implementations, the processor 1301 is further configured to: determine, based on the indication information, whether the remote device is configured for multipath transmission, and whether the secondary path of the remote device is an indirect link; in response to the remote device being configured for multipath transmission and the secondary path being an indirect link, not send the system information to the remote device; or, in response to either the remote device being configured for multipath transmission or the secondary path being an indirect link not being satisfied, send the system information to the remote device.

[0296] In some implementations, the processor 1301 is further configured to: determine, based on the status parameters of the remote device, that the remote device is configured for multi-path transmission, and that the secondary path of the remote device is an indirect link, and that the first serving cell of the remote device is different from the second serving cell of the relay device, and not send the system information to the remote device; or, based on the status parameters of the remote device, determine that if any one of the following conditions is not met—that the remote device is configured for multi-path connection, the secondary path is an indirect link, and the first serving cell is different from the second serving cell—the system information is sent to the remote device.

[0297] In some implementations, interface 1302 is also used for:

[0298] Receive multipath indication information sent by the communication device when the remote device is configured with multipath transmission;

[0299] Receive multipath bearer indication information sent by the communication device when the remote device is configured with multipath bearer;

[0300] The communication device receives path type indication information for the indirect link of the remote device, wherein the path type indication information is used to indicate whether the indirect link is a secondary primary path of the remote device.

[0301] The communication device receives the identifier of the first serving cell of the remote device when the primary path of the remote device is a direct path.

[0302] In some implementations, the identifier of the first serving cell is sent by the communication device to the relay device when it is determined that the first serving cell is different from the second serving cell of the relay device.

[0303] In some implementations, the processor 1301 is further configured to: determine whether the remote device is configured for multipath transmission based on the multipath indication; or, determine whether the remote device is configured for multipath transmission based on the multipath bearer indication.

[0304] In some implementations, the processor 1301 is further configured to: determine whether the secondary path is an indirect path based on the path type indication information.

[0305] In some implementations, the processor 1301 is further configured to: determine whether the first serving cell and the second serving cell are the same based on the identifier of the first serving cell; or, in response to the indirect path being the primary path and not receiving the identifier of the first serving cell, determine that the first serving cell and the second serving cell are the same.

[0306] In some implementations, the processor 1301 is further configured to: determine not to send the system information to the remote device in response to a release request indication that the indication information is the system information.

[0307] In some implementations, the processor 1301 is further configured to: detect updates to the system information;

[0308] When an update to the system information is detected, the system determines whether to send the system information to the remote device based on the indication information.

[0309] Chip 1300 also includes memory 1303, which is used to store necessary computer programs and data.

[0310] In this embodiment, the communication device sends an indication message to the relay device, and the relay device determines whether to send system information to the remote device based on the status parameters of the remote device. The indication message can instruct the relay device not to send system information to the remote device, thereby avoiding signaling overhead caused by unnecessary transmission of system information.

[0311] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented in hardware or software depends on the specific application and the overall system design requirements. Those skilled in the art can implement the described functionality using various methods for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of this application.

[0312] This application also provides a communication system, which includes the aforementioned... Figure 11 In the embodiments, the communication device serves as a terminal device and the communication device serves as a network device; alternatively, the system includes the aforementioned components. Figure 12 The embodiments include a communication device as a terminal device and a communication device as a network device.

[0313] This application also provides a readable storage medium having instructions stored thereon that, when executed by a computer, implement the functions of any of the above method embodiments.

[0314] This application also provides a computer program product that, when executed by a computer, implements the functions of any of the above method embodiments.

[0315] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented, in whole or in part, as a computer program product. The computer program product includes one or more computer programs. When the computer program is loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer program can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another. For example, the computer program can be transmitted from one website, computer, server, or data center to another via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., high-density digital video discs (DVDs)), or semiconductor media (e.g., solid-state drives (SSDs)).

[0316] Those skilled in the art will understand that the various numerical designations such as "first," "second," etc., involved in this application are merely for the convenience of description and are not intended to limit the scope of the embodiments of this application, nor do they indicate the order of sequence.

[0317] At least one in this application can also be described as one or more, and multiple can be two, three, four or more, and this application does not impose any limitation. In the embodiments of this application, for a technical feature, the technical features in that technical feature are distinguished by "first", "second", "third", "A", "B", "C" and "D", and there is no order or size among the technical features described by "first", "second", "third", "A", "B", "C" and "D".

[0318] The correspondences shown in the tables of this application can be configured or predefined. The values ​​of the information in each table are merely examples and can be configured to other values; this application is not limited to these values. When configuring the correspondences between information and parameters, it is not necessarily required to configure all the correspondences shown in each table. For example, the correspondences shown in some rows of the tables in this application may not be configured. Furthermore, appropriate modifications and adjustments can be made based on the above tables, such as splitting, merging, etc. The names of the parameters shown in the headings of the above tables can also use other names that the communication device can understand, and the values ​​or representations of the parameters can also be other values ​​or representations that the communication device can understand. In the implementation of the above tables, other data structures can also be used, such as arrays, queues, containers, stacks, linear lists, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables, etc.

[0319] The term "predefined" in this application can be understood as defined, pre-defined, stored, pre-stored, pre-negotiated, pre-configured, solidified, or pre-burned. Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0320] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0321] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method of controlling transmission of information by a relay device, characterized by, Performed by a communication device, the method includes: Send indication information to the relay device, the indication information being used to indicate the status parameters of the remote device, and instructing the relay device to determine whether to send system information to the remote device based on the status parameters of the remote device; The sending of indication information to the relay device includes at least one of the following: If it is determined that the remote device is configured for multipath transmission, multipath indication information is sent to the relay device; If it is determined that the remote device is configured with multipath bearer, send multipath bearer indication information to the relay device; The path type of the indirect link of the remote device is determined, and the path type indication information of the indirect link is sent to the relay device. The path type indication information is used to indicate whether the indirect link is the primary path. When the primary path of the remote device is determined to be a direct link, the identifier of the first serving cell of the remote device is sent to the relay device; When the type of the indirect link of the remote device is determined to be a secondary path, a release request instruction for the system information is sent to the relay device.

2. The method of claim 1, wherein, The method further includes: If the primary path of the remote device is a direct link, determine whether the first serving cell and the second serving cell of the relay device are the same. If the first serving cell is different from the second serving cell, the identifier of the first serving cell is sent to the relay device.

3. The method of claim 1, wherein, The main path is any of the following paths: The main path is the path used to transmit radio signaling bearers (SRBs). The primary path is the path that the remote device triggers to rebuild the radio control resource RRC connection when the path fails; The main path is the main transmission path of SRB; The primary path is the path used to maintain the RRC connection; The main path is the anchor path; The main path connects to the main cell PCell of the remote device.

4. The method of claim 3, wherein, If any path is not the primary path, it is determined to be the secondary path.

5. The method according to any one of claims 1-4, characterized in that, The communication device is the remote device or network device.

6. A method of controlling transmission of relay device information, characterized by, Performed by a relay device, the method includes: Receive indication information sent by the communication device, the indication information being used to indicate the status parameters of the remote device; Based on the status parameters of the remote device, determine whether to send system information to the remote device; The indication information sent by the receiving communication device includes at least one of the following: Receive multipath indication information sent by the communication device when the remote device is configured with multipath transmission; Receive multipath bearer indication information sent by the communication device when the remote device is configured with multipath bearer; The communication device receives path type indication information for the indirect link of the remote device, wherein the path type indication information is used to indicate whether the indirect link is the main path of the remote device; The communication device receives the identifier of the first serving cell of the remote device when the primary path of the remote device is a direct path. Receive a release system information request indication sent by the remote device when the type of the indirect link is a secondary path.

7. The method of claim 6, wherein, The step of determining whether to send system information to the remote device based on the status parameters of the remote device includes: Based on the status parameters of the remote device, it is determined that the remote device is configured for multipath transmission, and the system information is not sent to the remote device; or... Based on the status parameters of the remote device, it is determined that the remote device is configured with a multipath transmission failure, and the system information is sent to the remote device.

8. The method of claim 6, wherein, The step of determining whether to send system information to the remote device based on the status parameters of the remote device includes: Based on the status parameters of the remote device, if it is determined that the remote device is configured for multipath transmission and its secondary path is an indirect link, then the system information will not be sent to the remote device; or... Based on the indication information, if it is determined that either the remote device is configured for multipath transmission or the secondary path is an indirect link, the system information is sent to the remote device.

9. The method according to claim 6, characterized in that, The step of determining whether to send system information to the remote device based on the status parameters of the remote device includes: Based on the status parameters of the remote device, it is determined that the remote device is configured for multipath transmission, and the secondary path of the remote device is an indirect link. Furthermore, the first serving cell of the remote device is different from the second serving cell of the relay device, and the system information is not sent to the remote device; or... Based on the status parameters of the remote device, if it is determined that the remote device is configured with a multipath connection, the secondary path is an indirect link, and any one of the conditions that the first serving cell and the second serving cell are different is not met, the system information is sent to the remote device.

10. The method of claim 6, wherein, The step of determining whether to send system information to the remote device based on the status parameters of the remote device includes: In response to the indication that the system information is a release request, it is determined not to send the system information to the remote device.

11. The method of claim 6, wherein, When it is determined that the first serving cell is different from the second serving cell of the relay device, the identifier of the first serving cell is sent by the communication device to the relay device.

12. The method according to any one of claims 6-9, characterized in that, The process for determining whether a remote device is configured for multipath transmission includes: Based on the multipath indication information, determine whether the remote device is configured for multipath transmission; or, Based on the multipath bearer indication information, determine whether the remote device is configured for multipath transmission.

13. The method according to claim 8 or 9, characterized in that, The process of determining whether the secondary path of the remote device is an indirect link includes: Based on the path type indication information, determine whether the secondary path is an indirect path.

14. The method of claim 9, wherein, The process for determining whether the first serving cell and the second serving cell are the same includes: Based on the identifier of the first serving cell, determine whether the first serving cell and the second serving cell are the same; or, If the indirect link is the primary path and no identifier of the first serving cell is received, then the first serving cell is determined to be the same as the second serving cell.

15. The method according to any one of claims 6-10, characterized in that, The step of determining whether to send system information to the remote device based on the status parameters of the remote device includes: The system information update status is detected; When an update to the system information is detected, the system determines whether to send the system information to the remote device based on the indication information.

16. A communications device, characterized by include: The transceiver module is used to send indication information to the relay device. The indication information is used to indicate the status parameters of the remote device and to instruct the relay device to determine whether to send system information to the remote device based on the status parameters of the remote device. Sending instruction information to the relay equipment includes at least one of the following: If it is determined that the remote device is configured for multipath transmission, multipath indication information is sent to the relay device; If it is determined that the remote device is configured with multipath bearer, send multipath bearer indication information to the relay device; The path type of the indirect link of the remote device is determined, and the path type indication information of the indirect link is sent to the relay device. The path type indication information is used to indicate whether the indirect link is the primary path. When the primary path of the remote device is determined to be a direct link, the identifier of the first serving cell of the remote device is sent to the relay device; When the type of the indirect link of the remote device is determined to be a secondary path, a release request instruction for the system information is sent to the relay device.

17. A communications device, characterized by include: The transceiver module is used to receive indication information sent by the communication device, the indication information being used to indicate the status parameters of the remote device; The processing module is used to determine whether to send system information to the remote device based on the status parameters of the remote device. The indication information sent by the receiving communication device includes at least one of the following: Receive multipath indication information sent by the communication device when the remote device is configured with multipath transmission; Receive multipath bearer indication information sent by the communication device when the remote device is configured with multipath bearer; The communication device receives path type indication information for the indirect link of the remote device, wherein the path type indication information is used to indicate whether the indirect link is the main path of the remote device; The communication device receives the identifier of the first serving cell of the remote device when the primary path of the remote device is a direct path. Receive a release system information request indication sent by the remote device when the type of the indirect link is a secondary path.

18. A communications device, characterized by The device includes a processor and a memory, the memory storing a computer program, the processor executing the computer program stored in the memory to cause the device to perform the method as described in any one of claims 1 to 5.

19. A communications device, characterized by The device includes a processor and a memory, the memory storing a computer program, the processor executing the computer program stored in the memory to cause the device to perform the method as described in any one of claims 6 to 15.

20. A communications device, characterized by include: Processor and interface circuitry; The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to run the code instructions to perform the method as described in any one of claims 1 to 5.

21. A communications device, characterized by include: Processor and interface circuitry; The interface circuit is used to receive code instructions and transmit them to the processor; The processor is configured to run the code instructions to perform the method as described in any one of claims 6 to 15.

22. A computer-readable storage medium for storing instructions that, when executed, cause the method of any one of claims 1 to 5 to be implemented.

23. A computer-readable storage medium for storing instructions that, when executed, cause the method of any one of claims 6 to 15 to be implemented.

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