Multi-path communication methods and devices

Abstract

An embodiment of the present invention provides a multi-path communication method and apparatus. The remote terminal device receives an RRC reconfiguration message via a direct path for adding or changing an indirect path transmitted by a network device, and also sends an RRC reconfiguration completion message to the network device via the direct path. This allows the network device to understand whether the remote terminal device has successfully performed the configuration in the RRC reconfiguration message or successfully added or changed an indirect path, thereby ensuring that the remote terminal device and the network device have a consistent understanding of the remote terminal device's configuration and avoiding subsequent configuration conflicts or errors.

Description

Technical Field

[0001] The present invention relates to the technical field of communications.

Background Art

[0002] In 3GPP (registered trademark) Release 18, a scheme for supporting multi-path is being studied. A multi-path scenario may be one in which a remote user equipment (remote UE) is connected to the same network device (e.g., gNB) using one direct path and one indirect path. For example, the direct path may be that the remote UE is directly connected to the network device via the Uu interface, and the indirect path may be that the remote UE is connected to the network device by a relay from a Layer-2 (L2) UE to the network device, e.g., connected to the network device by a relay UE.

[0003] Note that the introduction of the above background art is for clearly and completely explaining the technical solution of the present invention and for facilitating the understanding of those skilled in the art. These technical solutions should not be construed as well-known to those skilled in the art just because they are described in the background art of the present invention.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The inventor has discovered the following. That is, in the multi-path scheme, in the case of a scenario where the indirect path is added or changed, there is currently no corresponding solution regarding how the remote UE transmits an RRC reconfiguration complete message to the network device.

[0005] In view of at least one of the above problems, embodiments of the present invention provide a multi-path communication method and apparatus. [Means for solving the problem]

[0006] According to one aspect of an embodiment of the present invention, a multi-path communication device is provided, which is installed in a remote terminal device, and the device is A receiving unit that receives RRC reconfiguration messages for adding or changing indirect paths for network equipment transmission via a direct path; and Includes a transmission unit that sends an RRC reconfiguration completion message to the network equipment via the direct path.

[0007] According to another aspect of the embodiment of the present invention, a multi-path communication device is provided, which is installed in a remote terminal device, and the device is The system includes a processing unit that, if the second condition or the second timer stops, deems the addition or modification of the indirect path successful, or performs related operations related to the success of the addition or modification of the indirect path.

[0008] According to another aspect of the embodiment of the present invention, a multi-path communication device is provided, which is installed in a remote terminal device, and the device is The system includes a processing unit that sends failure information to network equipment or initiates an RRC re-establishment procedure if the addition or modification of an indirect path fails.

[0009] According to another aspect of the embodiments of the present invention, a multi-path communication method is provided which is applied to remote terminal equipment, and the method is The remote terminal device receives an RRC reset message via a direct path for adding or changing an indirect path for network device transmission; and This includes the remote terminal device sending an RRC reconfiguration completion message to the network device via the direct path.

[0010] According to another aspect of the embodiments of the present invention, a multi-path communication method is provided which is applied to remote terminal equipment, and the method is If the second condition or the second timer stops, the remote terminal device considers the addition or modification of the indirect path to be successful, or the remote terminal device performs related operations related to the success of the addition or modification of the indirect path.

[0011] According to another aspect of the embodiments of the present invention, a multi-path communication method is provided which is applied to remote terminal equipment, and the method is This includes the remote terminal device transmitting failure information to the network device or initiating an RRC re-establishment procedure if the addition or modification of an indirect path fails.

[0012] According to another aspect of the embodiments of the present invention, a multi-path communication device is provided, which is arranged in a network device, and the device is A transmitting unit that sends an RRC reset message to a remote terminal device via a direct path for adding or changing an indirect path; and The unit includes a receiving unit that receives the RRC reset completion message for the remote terminal equipment transmission via the direct path.

[0013] According to another aspect of the embodiments of the present invention, a multi-path communication device is provided, which is arranged in a network device, and the device is The system includes a processing unit that, if the second condition or the second timer stops, deems the addition or modification of the indirect path successful, or performs related operations related to the success of the addition or modification of the indirect path.

[0014] According to another aspect of the embodiments of the present invention, a multi-path communication device is provided, which is arranged in a network device, and the device is Includes a receiving unit that receives failure information transmitted by terminal equipment when the addition or modification of an indirect path fails.

[0015] According to another aspect of the embodiment of the present invention, a multi-path communication method is provided, which is arranged in network equipment, and the method is The network device sends an RRC reset message to the remote terminal device via a direct path to add or change an indirect path; and This includes the network device receiving the RRC reset completion message from the remote terminal device via the direct path.

[0016] According to another aspect of the embodiments of the present invention, a multi-path communication method is provided which is applied to network equipment, and the method is If the second condition or the second timer stops, the network equipment considers the addition or modification of the indirect path to be successful, or the network equipment performs related operations related to the success of the addition or modification of the indirect path.

[0017] According to another aspect of the embodiments of the present invention, a multi-path communication method is provided which is applied to network equipment, and the method is The network equipment includes receiving failure information transmitted by terminal equipment when the addition or modification of an indirect path fails.

[0018] According to another aspect of the embodiments of the present invention, a remote terminal device is provided, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to realize the multi-path communication method on the remote terminal device side described above.

[0019] According to another aspect of the embodiment of the present invention, a network device is provided which includes a memory and a processor, wherein the memory stores a computer program and the processor is configured to execute the computer program to realize the multipath communication method on the network device side described above.

[0020] According to another aspect of the embodiments of the present invention, a communication system is provided which includes the network equipment and / or relay terminal equipment described above. [Effects of the Invention]

[0021] The advantageous effects of the embodiments of the present invention are at least as follows: that is, the remote terminal device receives, via a direct path, an RRC reconfiguration message for adding or changing an indirect path of network device transmission, and transmits, via the direct path, an RRC reconfiguration completion message to the network device. As a result, the network device can determine whether the remote terminal device has successfully executed the settings in the RRC reconfiguration message, or has successfully added or changed the indirect path, so as to enable the remote terminal device and the network device to have a consistent understanding about the settings of the remote terminal device, and avoid subsequent setting conflicts or setting errors.

[0022] Specific embodiments of the present invention are disclosed in detail by referring to the following description and drawings, showing aspects in which the principles of the present invention can be employed. It should be noted that the embodiments of the present invention are not limited in scope by these. Within the scope of the appended claims, the embodiments of the present invention may include various modifications, corrections, and substitutions.

[0023] Also, the features described and / or shown in one embodiment can be used in one or more other embodiments in the same or similar manner, combined with the features in other embodiments, or replace the features in other embodiments.

[0024] Note that terms such as "including / having", when used in this specification, refer to the presence of features, elements, steps, or assemblies, but also refer to the fact that they do not exclude the presence or addition of one or more other features, elements, steps, or assemblies.

Brief Description of the Drawings

[0025] The elements and features described in one drawing or one embodiment of the present invention can be combined with the elements and features shown in one or more other drawings or embodiments. Also, in the drawings, like reference numerals indicate corresponding parts in several drawings and are also used to indicate corresponding parts used in multiple embodiments. [Figure 1] It is a diagram showing a communication system in an embodiment of the present invention. [Figure 2] This figure shows a multi-path scenario according to an embodiment of the present invention. [Figure 3] This figure shows the multi-path protocol stack structure in an embodiment of the present invention. [Figure 4] This figure shows a multi-path communication method according to an embodiment of the present invention. [Figure 5] This figure shows the flow of information interaction in an embodiment of the present invention. [Figure 6] This figure shows the flow of information interaction in an embodiment of the present invention. [Figure 7] This figure shows the flow of information interaction in an embodiment of the present invention. [Figure 8] This figure shows a multi-path communication method according to an embodiment of the present invention. [Figure 9] This figure shows the flow of information interaction in an embodiment of the present invention. [Figure 10] This figure shows the flow of information interaction in an embodiment of the present invention. [Figure 11] This figure shows a multi-path communication method according to an embodiment of the present invention. [Figure 12] This figure shows the flow of information interaction in an embodiment of the present invention. [Figure 13] This figure shows a multi-path communication method according to an embodiment of the present invention. [Figure 14] This figure shows a multi-path communication method according to an embodiment of the present invention. [Figure 15] This figure shows a multi-path communication method according to an embodiment of the present invention. [Figure 16] This figure shows a multi-path communication device according to an embodiment of the present invention. [Figure 17] This figure shows a multi-path communication device according to an embodiment of the present invention. [Figure 18] This figure shows a multi-path communication device according to an embodiment of the present invention. [Figure 19] This figure shows a multi-path communication device according to an embodiment of the present invention. [Figure 20] This figure shows a multi-path communication device according to an embodiment of the present invention. [Figure 21] This figure shows a multi-path communication device according to an embodiment of the present invention. [Figure 22] This figure shows the configuration of a remote terminal device in an embodiment of the present invention. [Figure 23] This figure shows the configuration of network equipment in an embodiment of the present invention. [Modes for carrying out the invention]

[0026] The aforementioned and other features of the present invention will become clear by referring to the attached drawings and the following description. While the specification and drawings disclose specific embodiments of the present invention, these represent only a limited number of embodiments in which the principles of the present invention can be employed. It should be understood that the present invention is not limited to the described embodiments, but rather includes all modifications, variations, and substitutions within the scope of the attached claims.

[0027] In this embodiment of the present invention, the terms "communication network" or "wireless communication network" may refer to a network conforming to any communication standard such as LTE (Long Term Evolution), LTE-A (LTE-Advanced), WCDMA (registered trademark) (Wideband Code Division Multiple Access), HSPA (High-Speed ​​Packet Access), etc.

[0028] Furthermore, communication between devices in a communication system may be carried out according to any stage of communication protocol, and may include, but is not limited to, the following communication protocols: namely, 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, 5G, New Radio (NR), and / or other conventional or future-developed communication protocols.

[0029] In this embodiment of the present invention, the term "network device" refers, for example, to a device in a communication system that connects terminal devices to a communication network and provides services to said terminal devices. Network devices may include, but are not limited to, the following: "nodes" and / or "donors" in the IAB architecture, base stations (BS), access points (AP), transmission and reception points (TRP), broadcast transmitters, mobile management entities (MME), network gateways, servers, radio network controllers (RNC), base station controllers (BSC), etc.

[0030] Among these, base stations may include, but are not limited to, Node B (NodeB or NB), Evolutionary Node B (eNodeB or eNB), 5G base stations (gNB), and may also include RRH (Remote Radio Head), RRU (Remote Radio Unit), relay, or low-power nodes (e.g., femto, pico). Furthermore, the term "base station" may include some or all of these functions, and each base station can provide communication coverage to a specific geographic area. For example, a 5G base station gNB may include one gNB CU and one or more gNB DUs, where the CU / DU is a logical node of the gNB having some of the functions of the gNB. The term "cell" may refer to a base station and / or the area it covers, and this depends on the context in which the term is used.

[0031] In this embodiment of the present invention, the terms "User Equipment" (UE) or "Terminal Equipment" (TE) refer to devices that access a communication network via network equipment and receive services from the network. User equipment may be fixed or mobile, and may also be referred to as a mobile station (MS), terminal, subscriber station (SS), access terminal (AT), or station. For example, it may be terminal equipment served by an IAB node or IAB donor under an IAB architecture.

[0032] User devices may include, but are not limited to, the following: cellular phones, PDAs (Personal Digital Assistants), wireless modems, wireless communication devices, mobile devices, machine-type communication devices, laptop computers, cordless phones, smartphones, smartwatches, digital cameras, etc.

[0033] Furthermore, in scenarios such as IoT (Internet of Things), user devices may also be monitoring or measuring devices or equipment, and may include, but are not limited to, the following: machine-type communication (MTC) terminals, in-vehicle communication terminals, D2D (device-to-device) terminals, M2M (machine-to-machine) terminals, etc.

[0034] Furthermore, the terms “network side” or “network equipment side” refer to the network side, which may be a base station or include one or more network devices as described above. The terms “user side” or “terminal side” or “terminal equipment side” refer to the user or terminal side, which may be a UE or include one or more terminal devices as described above. Unless otherwise specified, “equipment” may refer to network equipment or terminal equipment.

[0035] Figure 1 shows a communication system in an embodiment of the present invention, illustrating a case where a remote terminal device, a relay terminal device, and a network device are used as examples. As shown in Figure 1, the communication system 100 may include a remote terminal device 101, a relay terminal device 102, and a network device 103, and the remote terminal device 101 is connected to the network device 103 by direct and indirect paths. For convenience, Figure 1 uses two terminal devices (one remote terminal device and one relay terminal device) and one network device as examples for explanation, but embodiments of the present invention are not limited to these.

[0036] In embodiments of the present invention, conventional services (services / traffic) or future operational tasks may be performed between the network device 103 and the remote terminal device 101 and the relay terminal device 102. For example, these tasks include, but are not limited to, eMBB (enhanced Mobile Broadband), mMTC (massive Machine Type Communication), and URLLC (Ultra-Reliable and Low-Latency Communication).

[0037] Figure 2 shows a multi-path scenario according to an embodiment of the present invention. As shown in Figure 2, in the embodiment of the present invention, a remote terminal device can simultaneously communicate with a network device (e.g., gNB) via a direct path and an indirect path. For example, the remote terminal device can communicate with the network device via a Uu interface (direct path) and also communicate with the same network device via a relay terminal device (indirect path).

[0038] Figure 3 shows the protocol stack structure of a multi-path in an embodiment of the present invention. As shown in Figure 3, the direct path between the remote terminal device and the network device employs the Uu interface protocol stack, while the indirect path between the remote terminal device and the network device is transmitted via the L2 UE-to-Network relay and employs the PC5 interface and the Uu interface protocol stack.

[0039] In some embodiments, as shown in Figure 3, the RRC layer, SDAP (Service Data Adaptation Protocol) layer, and PDCP (Packet Data Convergence Protocol) layer of the remote terminal device are equivalent to the RRC layer, SDAP layer, and PDCP layer of the network device. PDCP layer data from the remote terminal device is transmitted to the network device via an indirect path through the relay terminal device. For example, the PDCP PDU (Protocol Data Unit) of the remote terminal device is transmitted to the relay UE via sidelink through PC5-SRAP (Sidelink Relay Adaptation Protocol), PC5-RLC, PC5-MAC, and PC5-PHY on the PC5 interface. The relay UE then transmits the data to the gNB via its Uu interface protocol stack (Uu SRAP, Uu-RLC, Uu-MAC, and Uu-PHY). The gNB receives this data from the Uu interface protocol stack equivalent to that of the relay UE and transmits it to the gNB's Uu-PDCP for processing.

[0040] Alternatively, PDCP layer data from a remote terminal device can be transmitted to a network device via a direct path. For example, the PDCP PDU from the remote terminal device can be sent to the gNB via Uu-RLC, Uu-MAC, and Uu-PHY. On the gNB side, a Uu interface protocol stack equivalent to the remote UE can receive this data and send it to the gNB's Uu-PDCP for processing.

[0041] In some embodiments, in direct and / or indirect paths, one or more RLC (Radio Link Control) entities (Uu-RLC entities or PC5-RLC entities) may be associated with a PDCP entity of a single radio bearer.

[0042] In some embodiments, as shown in Figure 3, the gNB-side protocol stack may use multiple Uu-MAC entities to process data from remote terminal devices and relay terminal devices. The present invention is not limited thereto, and a single Uu-MAC entity may be used to process data from remote terminal devices and relay terminal devices.

[0043] In some embodiments, as shown in Figure 3, the protocol stack on the remote terminal device side may use PC5-MAC entities and Uu-MAC entities to process indirect and direct path data. The present invention is not limited thereto, and PC5-MAC and Uu-MAC operations may be performed using a single MAC entity.

[0044] In some embodiments, as shown in Figure 3, transmission via a direct path refers to, for example, the PDCP layer transmitting data to a Uu RLC bearer, channel, or entity, while transmission via an indirect path refers to, for example, the PDCP layer transmitting data to an SRAP entity, and then the RLC bearer, channel, or entity of PC5 transmitting the data.

[0045] In some embodiments, the data may be a PDCP SDU (Service Data Unit), a PDCP PDU, or an RLC SDU, etc.

[0046] In some embodiments, the gNB to which the remote terminal device is connected by a direct path is the same gNB as the gNB to which the remote terminal device is connected by an indirect path. The cell to which the remote terminal device is connected by a direct path is the same cell as the cell to which the remote terminal device is connected by an indirect path, or the cell to which the remote terminal device is connected by a direct path is a different cell from the cell to which the remote terminal device is connected by an indirect path, and the different cell may be a cell within the same frequency or a cell between frequencies.

[0047] In some embodiments, the following cases are supported in multi-path scenarios, namely, A. The remote UE operating only on the direct path adds the indirect path under the same gNB. B. The remote UE operating only on the indirect path adds the direct path under the same gNB. C. The remote UE operating in multi-path releases the indirect path. D. The remote UE operating in multi-path releases the direct path; G. The remote UE operating in multi-path changes to a new relay UE for the indirect path while keeping the direct path under the same gNB. This is FFS if this case would be supported via separate release-and-add (A+C in separate reconfigurations) or a single switch procedure (e.g., similar to i2i service continuity); and E. The remote UE operating in multi-path changes the direct path to a different cell of the same gNB while using the serving relay UE for the indirect path under the same gNB.

[0048] Changing the direct path while maintaining the indirect path can be accomplished with a release-and-add in a single RRC message. This does not exclude a gNB implementation from using separate release and add procedures instead.

[0049] Changing the indirect path while maintaining the direct path can be accomplished with a release-and-add in a single RRC message. This does not exclude a gNB implementation from using separate release and add procedures instead.

[0050] The following describes various embodiments of the present invention in conjunction with the drawings. These embodiments are merely illustrative and do not limit the present invention.

[0051] <Example of the first side view> An embodiment of the present invention provides a multi-path communication method, which is applied to remote terminal equipment. Figure 4 shows the multi-path communication method in an embodiment of the present invention. As shown in Figure 4, the method includes the following, namely, 401: A remote terminal device receives an RRC reconfiguration message via a direct path for adding or changing an indirect path for network device transmission; and 402: The remote terminal device sends an RRC reconfiguration complete message to the network device via a direct path.

[0052] Figure 4 above is provided to illustrate an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between each operation (step) can be appropriately adjusted, or some operations can be appropriately increased or decreased. Those skilled in the art can make appropriate modifications based on the above description without being limited to the description in Figure 4.

[0053] In the above embodiment, the remote terminal device receives an RRC reconfiguration message via a direct path for adding or changing an indirect path transmitted by the network device, and also sends an RRC reconfiguration completion message to the network device via a direct path. This allows the network device to understand whether the remote terminal device has successfully performed the configuration in the RRC reconfiguration message or successfully added or changed an indirect path, thus ensuring that the remote terminal device and the network device have a consistent understanding of the remote terminal device's configuration and avoiding subsequent configuration conflicts or errors.

[0054] For example, in case A (addition of an indirect path), the remote terminal device receives an RRC reconfiguration message via the direct path for adding an indirect path to the network device transmission, and the RRC reconfiguration message may include the indicator and SRAP settings of the relay terminal device; in case G (change of an indirect path, for example, releasing the original indirect path and then adding a new indirect path, the addition of the new indirect path may be the same as in case A), the remote terminal device receives an RRC reconfiguration message via the direct path for changing the indirect path to the network device transmission, and the RRC reconfiguration message may include the release of the original SRAP settings, the indicator and SRAP settings of the relay terminal device.

[0055] After receiving an RRC reconfiguration message for adding an indirect path or an RRC reconfiguration message for changing an indirect path, the remote terminal device must send an RRC reconfiguration complete message to the network device at an appropriate time. If a signaling radio bearer (SRB) is configured on the direct path to carry the RRC reconfiguration complete message, for example, if SRB1, split SRB1, or duplication SRB1 is configured on the direct path, the remote terminal device will send the RRC reconfiguration complete message via the direct path.

[0056] The remote terminal device sending an RRC reset completion message may be equivalently replaced by the remote terminal device's RRC layer passing the RRC reset completion message to a lower layer for transmission, or by the remote terminal device considering the direct path addition or modification procedure to be successful.

[0057] In some embodiments, the RRC reset completion message may be sent at various times after the remote terminal device receives the RRC reset message from the network device. For example, the RRC reset completion message may be sent at at least one of the following times, i.e., After the remote terminal device has performed the corresponding configuration based on the RRC reconfiguration message; After the remote terminal device establishes a PC5 connection with the relay terminal device; After the remote terminal device sends a PC5-RRC message to the relay terminal device; After the remote terminal device sends a PC5-RRC trigger to the relay terminal device; After the remote terminal device receives instruction information from the relay terminal device; or After the first timer for the procedure to add or modify an indirect path has stopped That is the case.

[0058] In some embodiments, the remote terminal device performing corresponding configurations based on the RRC reconfiguration message may include operations related to adding indirect pathways, such as establishing SRAP settings.

[0059] In some embodiments, the remote terminal device performing corresponding configurations based on the RRC reconfiguration message may include operations related to changes in the indirect pathway, such as releasing the original SRAP configuration and adding a new SRAP configuration, or modifying the original SRAP configuration.

[0060] In some embodiments, the establishment of a PC5 connection between a remote terminal device and a relay terminal device may include the V2X (Vehicle to Everything) layer sending a direct communication request or a direct communication response. The PC5 connection may also be referred to as a PC5-RRC connection.

[0061] In some embodiments, the PC5-RRC message transmitted by the remote terminal device to the relay terminal device may include at least one of the following: RemoteUEInformationSidelink, RRCReconfigurationSidelink, RRCReconfigurationCompleteSidelink, UEAssistanceInformationSidelink, or a new PC5-RRC message.

[0062] In some embodiments, the PC5-RRC trigger is used to cause a relay terminal device to enter the RRC_Connected state. For example, in scenarios involving the addition or modification of an indirect path, the relay terminal device may be in the RRC_Idle or RRC_Inactive state. The remote terminal device can send the PC5-RRC trigger to the relay terminal device to cause it to enter the RRC_Connected state and then to provide relay services to the remote terminal device.

[0063] In some embodiments, the instruction information transmitted by the relay terminal device to the remote terminal device may include information indicating that the relay terminal device has entered the RRC_Connected state. In other words, after the remote terminal device confirms that the relay terminal device has entered the RRC_Connected state, it sends an RRC reconfiguration complete message to the network device. For example, this instruction information may be a PC5-RRC message.

[0064] In some embodiments, the first timer may be activated when a remote terminal device receives an RRC reset message for adding or changing an indirect path. The present invention is not limited thereto, and the first timer may be activated at other times.

[0065] In some embodiments, the first timer may be stopped under a first condition, which includes at least one of the following: the remote terminal device has sent a PC5-RRC message to the relay terminal device; the remote terminal device has sent a PC5-S message to the relay terminal device; the remote terminal device has been transmitted wireless bearer data by the relay terminal device; the PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal device; the remote terminal device has a PC5 connection with the relay terminal device; or the remote terminal device has received instruction information from the relay terminal device.

[0066] In some embodiments, the PC5-RRC message transmitted by the remote terminal device to the relay terminal device may include at least one of the following: RemoteUEInformationSidelink, RRCReconfigurationSidelink, RRCReconfigurationCompleteSidelink, UEAssistanceInformationSidelink, or a new PC5-RRC message.

[0067] In some embodiments, the PC5-S message transmitted by the remote terminal device to the relay terminal device may include at least one of the following: a discovery message; or a direct communication request / response message.

[0068] In some embodiments, the message relating to the discovery may include at least one of the following: a discovery solicitation or a discovery response.

[0069] In some embodiments, the successful transmission of PC5-RRC messages and / or PC5-S messages to a relay terminal device includes the remote terminal device receiving feedback information about the PC5-RRC messages and / or PC5-S messages from the relay terminal device, such as an acknowledgment of the PC5-RLC layer.

[0070] In some embodiments, the data of the wireless bearer may be the data of the data wireless bearer (DRB), or the signaling of the signaling wireless bearer (SRB), for example, other RRC signaling other than RRC reconfiguration complete for the SRB1 bearer, or the non-access layer (NAS) signaling of the SRB2 bearer.

[0071] In some embodiments, the establishment of a PC5 connection between a remote terminal device and a relay terminal device includes situations where the V2X (Vehicle to Everything) layer sends a direct communication request or a direct communication response.

[0072] In some embodiments, the instruction information transmitted by the relay terminal device to the remote terminal device may include information indicating that the relay terminal device has entered the RRC_Connected state. In other words, the remote terminal device stops the first timer after confirming that the relay terminal device is in the RRC_Connected state.

[0073] The following illustrates how a remote terminal device sends an RRC reconfiguration completion message, using an indirect path addition scenario as an example. For clarity, the following also applies to scenarios involving changes to the indirect path.

[0074] Figure 5 shows the flow of information interaction in an embodiment of the present invention. As shown in Figure 5, the network device transmits measurement settings to the remote terminal device (501), for example, by direct path. The remote terminal device transmits a measurement report to the network device (502), for example, by direct path. Based on the measurement report, the network device decides whether to add an indirect path (503). If the network device decides to add an indirect path, it transmits an RRC reset message for adding the indirect path to the remote terminal device (504), for example, by direct path. In the scenario of changing the indirect path, in 503, the network device decides whether to change the indirect path based on the measurement report from the remote terminal device, and the above-mentioned measurement settings and / or measurement report can be transmitted by direct or indirect path, and in 504, the network device transmits an RRC reset message for changing the indirect path to the remote terminal device, and the RRC reset message can be transmitted by direct or indirect path.

[0075] Based on the RRC reconfiguration message, the remote terminal device performs the corresponding configuration and then sends an RRC reconfiguration complete message via the direct path (505). The remote terminal device establishes a PC5 connection with the relay terminal device (506). The remote terminal device sends a PC5-RRC message to the relay terminal device (507). The remote terminal device sends a PC5-RRC trigger to the relay terminal device (508). The relay terminal device sends instruction information to the remote terminal device to instruct the relay terminal device to enter the RRC_Connected state (509).

[0076] Figure 5 above is provided to illustrate an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between each operation can be appropriately adjusted, or some operations can be appropriately added or removed, and for example, 507 and / or 508 and / or 509 are optional. Those skilled in the art can make appropriate modifications based on the above description without being limited to the description in Figure 5.

[0077] In some embodiments, steps 507 and 508 may be a single step, for example, by sending a PC5-RRC trigger via a PC5-RRC message. The present invention is not limited thereto, and steps 507 and 508 may be different steps.

[0078] In some embodiments, as shown in Figure 5, the remote terminal device may send an RRC reset completion message after performing the corresponding settings based on the RRC reset message; that is, 505 may be executed after 504. The present invention is not limited thereto, and the remote terminal device may send an RRC reset completion message after establishing a PC5 connection with the relay terminal device; that is, 505 may be executed after 506. Alternatively, the remote terminal device may send an RRC reset completion message after sending a PC5-RRC message to the relay terminal device; that is, 505 may be executed after 507. Alternatively, the remote terminal device may send an RRC reset completion message after sending a PC5-RRC trigger to the relay terminal device; that is, 505 may be executed after 508. Alternatively, the remote terminal device may send an RRC reset completion message after receiving instruction information from the relay terminal device; that is, 505 may be executed after 509.

[0079] Figure 6 is another diagram showing the information interaction flow in an embodiment of the present invention. As shown in Figure 6, the network device transmits measurement settings to the remote terminal device (601). The remote terminal device transmits a measurement report to the network device (602). Based on the measurement report, the network device decides whether to add an indirect path (603). If the network device decides to add an indirect path, it transmits an RRC reset message to the remote terminal device for the addition of the indirect path (604). In the scenario where the indirect path is changed, in 603, the network device decides whether to change the indirect path based on the measurement report from the remote terminal device, and in 604, the network device transmits an RRC reset message to the remote terminal device for the change of the indirect path. For the transmission method of the measurement settings and / or measurement report and / or RRC reset message, refer to the relevant contents of 501, 502, and 503 in Figure 5.

[0080] The remote terminal device starts the first timer after receiving an RRC reconfiguration message for the addition of an indirect path (605). The remote terminal device establishes a PC5 connection with the relay terminal device (606). The remote terminal device stops the first timer (607). The present invention is not limited thereto, and as described above, the first timer may be stopped at other times (under the first condition). After the first timer is stopped, the remote terminal device sends an RRC reconfiguration completion message to the network device via a direct path (608).

[0081] Figure 6 above is provided to illustrate an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between each operation can be appropriately adjusted, or some operations can be appropriately added or removed. For example, 609 and / or 610 and / or 611 may be added, and among these, 609, 610 and 611 may be the same as 507, 508 and 509 in Figure 5. Those skilled in the art can make appropriate modifications based on the above description, without being limited to the description in Figure 6.

[0082] In some embodiments, as shown in Figure 4, the communication method may further include the following: 403: After the remote terminal device establishes a PC5 connection with the relay terminal device, the remote terminal device further sends an RRC reconfiguration completion message via the indirect path.

[0083] For example, if a duplication SRB1 or split SRB1 is configured as an indirect path, the remote terminal device will also send an RRC reconfiguration completion message via the indirect path, and in the RRC reconfiguration message for adding or changing an indirect path, SRB1 will be configured as a duplication or split radio bearer (split RB).

[0084] Figure 7 is another diagram showing the information interaction flow in an embodiment of the present invention. As shown in Figure 7, the network device transmits measurement settings to the remote terminal device (701). The remote terminal device transmits a measurement report to the network device (702). Based on the measurement report, the network device decides whether to add an indirect path (703). If the network device decides to add an indirect path, it transmits an RRC reset message to the remote terminal device for adding the indirect path (704). In the scenario where the indirect path is changed, in 703, the network device decides whether to change the indirect path based on the measurement report from the remote terminal device, and in 704, the network device transmits an RRC reset message to the remote terminal device for changing the indirect path. For the transmission method of the measurement settings and / or measurement report and / or RRC reset message, refer to the relevant contents of 501, 502, and 503 in Figure 5.

[0085] The remote terminal device may, after performing the corresponding configuration based on the RRC reconfiguration message, send an RRC reconfiguration complete message via a direct path (705). The present invention is not limited thereto, and as described above, the remote terminal device may send an RRC reconfiguration complete message at another time. The remote terminal device establishes a PC5 connection with the relay terminal device (706). The remote terminal device sends an RRC reconfiguration complete message (707) to the relay terminal device, and the relay terminal device sends an RRC reconfiguration complete message (708) to the network device, thereby sending the RRC reconfiguration complete message via an indirect path.

[0086] Figure 7 above is provided to illustrate an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between each operation (step) can be appropriately adjusted, or some operations can be appropriately increased or decreased. Those skilled in the art can make appropriate modifications based on the above description without being limited to the description in Figure 7. For example, as mentioned above, the first timer may be stopped at other times.

[0087] The embodiments described above are for illustrative purposes to illustrate embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the embodiments described above. For example, the embodiments described above may be used individually, or a combination of several of the embodiments described above may be used.

[0088] Although only the steps relating to the present invention have been described above, the present invention is not limited thereto. A multi-path communication method may further include other steps, and the specific details of these steps can be found in related technologies.

[0089] In the above embodiment, the remote terminal device receives an RRC reconfiguration message via a direct path for adding or changing an indirect path transmitted by the network device, and also sends an RRC reconfiguration completion message to the network device via a direct path. This allows the network device to understand whether the remote terminal device has successfully performed the configuration in the RRC reconfiguration message or successfully added or changed an indirect path, thus ensuring that the remote terminal device and the network device have a consistent understanding of the remote terminal device's configuration and avoiding subsequent configuration conflicts or errors.

[0090] <Example of the second aspect> An embodiment of the present invention provides a multi-path communication method, which is applied to the remote terminal equipment side. Here, the same content as in the first embodiment is omitted. The second embodiment can be implemented independently, or it can be implemented in combination with the first embodiment.

[0091] Figure 8 shows a multi-path communication method in an embodiment of the present invention. As shown in Figure 8, the method includes the following, namely, 801: If the second condition or the second timer stops, the remote terminal device considers the addition or modification of the indirect path to be successful, or performs the relevant operations related to the success of the addition or modification of the indirect path.

[0092] Figure 8 above is provided to illustrate an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between each operation (step) can be appropriately adjusted, or some operations can be appropriately increased or decreased. Those skilled in the art can make appropriate modifications based on the above description without being limited to the description in Figure 8.

[0093] In the embodiment described above, when the second condition or the second timer stops, the remote terminal device considers the addition or modification of the indirect path to be successful, or performs the relevant operations related to the successful addition or modification of the indirect path. This allows the remote terminal device to determine, based on the second condition or the second timer, whether the operation of adding or modifying the indirect path was successful, or whether it can perform the relevant operations related to the successful addition or modification of the indirect path, thereby preventing the remote terminal device from performing inappropriate operations.

[0094] In some embodiments, the operations related to the successful addition or modification of the indirect path may include the following: the RRC layer of the remote terminal device passes an RRC reset completion message to a lower layer for transmission, or transmits uplink data via the indirect path.

[0095] In some embodiments, the second timer may be activated when the remote terminal device receives an RRC reset message for adding or changing an indirect path. The present invention is not limited thereto, and the second timer may be activated at other times.

[0096] In some embodiments, the second timer may be stopped under a second condition, which includes at least one of the following: an RRC reset complete message has been successfully transmitted; the remote terminal device has transmitted a PC5-RRC message to the relay terminal device; the remote terminal device has transmitted a PC5-S message to the relay terminal device; the remote terminal device has been transmitted wireless bearer data by the relay terminal device; the PC5-RRC message and / or PC5-S message has been successfully transmitted to the relay terminal device; the remote terminal device has established a PC5 connection with the relay terminal device; or the remote terminal device has received instruction information from the relay terminal device.

[0097] In some embodiments, the PC5-RRC message transmitted by the remote terminal device to the relay terminal device may include at least one of the following: RemoteUEInformationSidelink, RRCReconfigurationSidelink, RRCReconfigurationCompleteSidelink, UEAssistanceInformationSidelink, or a new PC5-RRC message.

[0098] In some embodiments, the PC5-S message transmitted by the remote terminal device to the relay terminal device may include at least one of the following: a discovery message; or a direct communication request / response message.

[0099] In some embodiments, the message relating to the discovery may include at least one of the following: a discovery solicitation or a discovery response.

[0100] In some embodiments, the data of the wireless bearer may be the data of the data wireless bearer (DRB), or the signaling of the signaling wireless bearer (SRB), for example, other RRC signaling other than RRC reconfiguration complete for the SRB1 bearer, or the non-access layer (NAS) signaling of the SRB2 bearer.

[0101] In some embodiments, the successful transmission of the RRC reconfiguration completion message and / or PC5-RRC message and / or PC5-S message to the relay terminal device may include the remote terminal device receiving feedback information from the relay terminal device regarding the RRC reconfiguration completion message and / or PC5-RRC message and / or PC5-S message, such as an acknowledgment of the PC5-RLC layer.

[0102] In some embodiments, the establishment of a PC5 connection between a remote terminal device and a relay terminal device may include the V2X (Vehicle to Everything) layer sending a direct communication request or a direct communication response.

[0103] In some embodiments, the instruction information transmitted by the relay terminal device to the remote terminal device may include information indicating that the relay terminal device has entered the RRC_Connected state. In other words, the remote terminal device stops the second timer after confirming that the relay terminal device has entered the RRC_Connected state.

[0104] In some embodiments, as shown in Figure 8, the communication method may further include the following, namely, 802: When the second timer expires, the remote terminal device considers the addition or modification of the indirect path to have failed, or performs the relevant operations related to the failure of the addition or modification of the indirect path.

[0105] In some embodiments, the relevant operations regarding the failure of adding or modifying an indirect path may include, namely, sending failure information to network equipment or initiating an RRC re-establishment procedure. For details regarding sending failure information to network equipment, refer to the embodiments described in the third aspect below. For details regarding initiating an RRC re-establishment procedure, refer to the related technologies.

[0106] Figure 9 shows the flow of information interaction in an embodiment of the present invention. As shown in Figure 9, the network device transmits measurement settings to the remote terminal device (901). The remote terminal device transmits a measurement report to the network device (902). Based on the measurement report, the network device decides whether to add an indirect path (903). If the network device decides to add an indirect path, it transmits an RRC reset message to the remote terminal device for the addition of the indirect path (904). In the scenario of changing the indirect path, in 903, the network device decides whether to change the indirect path based on the measurement report from the remote terminal device, and in 904, the network device transmits an RRC reset message to the remote terminal device for the change of the indirect path. For the transmission method of the measurement settings and / or measurement report and / or RRC reset message, refer to the relevant contents of 501, 502, and 503 in Figure 5 of the embodiment of the first aspect.

[0107] The remote terminal device starts the second timer after receiving an RRC reset message for the addition of an indirect path (905). The remote terminal device establishes a PC5 connection with the relay terminal device (906). The remote terminal device stops the second timer (907). The present invention is not limited thereto, and as stated above, the second timer may be stopped at other times (under the second condition). When the second timer is stopped, the remote terminal device considers the addition or modification of the indirect path to be successful, or performs the relevant operations relating to the success of the addition or modification of the indirect path (908).

[0108] Figure 10 is another diagram showing the flow of information interaction in an embodiment of the present invention. As shown in Figure 10, 1001 to 1005 are the same as 901 to 905 in Figure 9. If the second condition is not met, the second timer is deactivated (1006). When the second timer is deactivated, the remote terminal device considers that the addition or modification of the indirect path has failed, or performs the relevant operation related to the failure of the addition or modification of the indirect path (1007).

[0109] Figures 9 and 10 above are illustrative examples illustrating embodiments of the present invention, but the present invention is not limited to these. For example, the execution order between each operation (step) can be appropriately adjusted, or some operations can be appropriately increased or decreased. Those skilled in the art can make appropriate modifications based on the above description, without being limited to the descriptions in Figures 9 and 10.

[0110] The embodiments described above are for illustrative purposes to illustrate embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the embodiments described above. For example, the embodiments described above may be used individually, or a combination of several of the embodiments described above may be used.

[0111] As can be seen from the above embodiment, when the second condition or the second timer stops, the remote terminal device considers the addition or modification of the indirect path to be successful, or performs the relevant operations related to the success of the addition or modification of the indirect path. This allows the remote terminal device to determine, based on the second condition or the second timer, whether the operation of adding or modifying the indirect path was successful, or whether it can perform the relevant operations related to the success of the addition or modification of the indirect path, thereby preventing the remote terminal device from performing inappropriate operations.

[0112] <Example of the third side> An embodiment of the present invention provides a multi-path communication method, which is applied to the remote terminal equipment side. Here, descriptions identical to those in the first and second embodiments are omitted. The third embodiment can be implemented independently, or it can be implemented in combination with the first and / or second embodiments.

[0113] Figure 11 shows a multi-path communication method according to an embodiment of the present invention. As shown in Figure 11, the method includes the following, namely, 1101: If the addition or modification of an indirect path fails, the remote terminal device sends failure information to the network device or initiates the RRC re-establishment procedure.

[0114] Figure 11 above is provided to illustrate an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between each operation (step) can be appropriately adjusted, or some operations can be appropriately increased or decreased. Those skilled in the art can make appropriate modifications based on the above description without being limited to the description in Figure 11.

[0115] In the above embodiment, if the addition or modification of an indirect path fails, the remote terminal device sends failure information to the network device or initiates an RRC re-establishment procedure, thereby allowing the network device to understand whether the remote terminal device successfully added or modified the indirect path. This ensures that the remote terminal device and the network device have a consistent understanding of the remote terminal device's configuration, thus avoiding subsequent configuration conflicts or errors.

[0116] In some embodiments, failure to add or modify an indirect path may include, namely, failure of the relay terminal device to enter a connected state; rejection of the relay terminal device's RRC connection; the relay terminal device changing serving cells or serving base stations; cell selection occurring at the relay terminal device; cell reselection occurring at the relay terminal device; switching occurring at the relay terminal device; the third timer expiring; failure to establish a PC5 connection; or failure of the PC5 wireless link.

[0117] In some embodiments, when adding or modifying an indirect path, the added relay terminal device may be in the RRC_Idle or RRC_Inactive state. The relay terminal device needs to enter the RRC_Connected state in order to provide relay services to the remote terminal device. If the relay terminal device fails to enter the connected state, or if the RRC connection to the relay terminal device is rejected, the addition or modification of the indirect path may fail.

[0118] In some embodiments, between the time the remote terminal receives the measurement settings transmitted by the network device and the time it establishes a PC5 connection with the relay terminal, the relay terminal may change the serving cell or serving base station. The serving cell (or serving base station) to which the remote terminal is directly connected must be the same as the serving cell (or serving base station) to which the relay terminal is connected. If the relay terminal changes the serving cell or serving base station, and cell selection occurs on the relay terminal, re-selection occurs on the relay terminal, or switching of the relay terminal occurs, it may cause the addition or modification of the lethal indirect path to fail.

[0119] In some embodiments, failure to establish a PC5 connection between the remote terminal device and the relay terminal device, or successful establishment of the PC5 connection but failure of the PC5 wireless link, can lead to failure to add or modify the indirect path.

[0120] In some embodiments, the third timer may be stopped under a third condition. This third condition includes at least one of the following: an RRC reset completion message has been successfully transmitted; the remote terminal device has transmitted a PC5-RRC message to the relay terminal device; the remote terminal device has transmitted a PC5-S message to the relay terminal device; the remote terminal device has been transmitted wireless bearer data by the relay terminal device; the PC5-RRC message and / or PC5-S message has been successfully transmitted to the relay terminal device; the remote terminal device has established a PC5 connection with the relay terminal device; or the remote terminal device has received instruction information from the relay terminal device. Of these, the third condition is the same as or similar to the second condition in the embodiments of the second aspect, so their contents are combined here and a detailed explanation is omitted.

[0121] In some embodiments, remote terminal devices can transmit failure information via a direct path. The present invention is not limited thereto, and the failure information may also be transmitted via an indirect path. For example, if a change in the indirect path fails, the failure information may be transmitted via the original indirect path.

[0122] In some embodiments, the remote terminal device initiates the RRC re-establishment procedure by sending an RRC re-establishment request message in or via a cell after the remote terminal device has performed cell selection and / or relay selection to find a suitable cell and / or suitable relay terminal device.

[0123] In some embodiments, if the addition or modification of an indirect path fails, the remote terminal can initiate the RRC re-establishment procedure if SRB1, split SRB1, or duplication SRB1 is not set on the direct path. For example, in an RRC re-establishment message that adds or modifies an indirect path, only SRB1 is set on the indirect path, i.e., SRB1, split SRB1, or duplication SRB1 is not set on the direct path.

[0124] In some embodiments, failure information can be transmitted at various times. For example, the failure information may be transmitted after the remote terminal device receives notification of transmission from the relay terminal device.

[0125] In some embodiments, the notification may include at least one of the following: that the RRC connection establishment or recovery procedure of the relay terminal equipment has failed or been rejected; that cell reselection or switching has occurred at the relay terminal equipment; and that the serving cell of the relay terminal equipment included in the discovery message (discovery message) of the relay terminal equipment is different from a serving cell that is directly connected to the remote terminal equipment, or that the serving base station of the relay terminal equipment included in the discovery message is different from a serving base station that is directly connected to the remote terminal equipment.

[0126] Figure 12 shows the flow of information interaction in an embodiment of the present invention. As shown in Figure 12, the network device transmits measurement settings to the remote terminal device (1201). The remote terminal device transmits a measurement report to the network device (1202). Based on the measurement report, the network device decides whether to add an indirect path (1203). If the network device decides to add an indirect path, it transmits an RRC reset message to the remote terminal device for the addition of the indirect path (1204). In the scenario of changing the indirect path, in 1203, the network device decides whether to change the indirect path based on the measurement report from the remote terminal device, and in 1204, the network device transmits an RRC reset message to the remote terminal device for the change of the indirect path. For the transmission method of the measurement settings and / or measurement report and / or RRC reset message, refer to the relevant contents of 501, 502, and 503 in Figure 5 of the embodiment of the first aspect.

[0127] The remote terminal device sends an RRC reset completion message to the network device via a direct path (1205). The present invention is not limited thereto, and as described above, the remote terminal device may send an RRC reset completion message to the network device via a direct path at another time. The remote terminal device establishes a PC5 connection with the relay terminal device (1206). The remote terminal device sends a PC5-RRC trigger to the relay terminal device (1207), which causes the relay terminal device to enter the RRC_Connected state. If the relay terminal device fails to enter the RRC_Connected state (1208), the relay terminal device sends a sidelink instruction message to the remote terminal device (1209). The remote terminal device sends failure information to the network device (1210).

[0128] In some embodiments, the failure information may be included in the RRC message or a lower-level instruction.

[0129] In some embodiments, the RRC message may include at least one of the following: a sidelink UE Information message, a Secondary Cell Group failure information (SCG failure information) message, or a new RRC message.

[0130] In some embodiments, the lower layer instruction may include at least one of the following: namely, a PDCP control PDU, an RLC control PDU, or a MAC CE.

[0131] In some embodiments, the failure information may include the failure type and / or the cause of the failure. This allows more information to be provided to the network equipment.

[0132] In some embodiments, the failure type and / or cause of failure may include at least one of the following: namely, the relay terminal device has failed to enter a connected state; the relay terminal device's RRC connection has been rejected; the relay terminal device has changed serving cells or serving base stations; cell selection has occurred for the relay terminal device; cell reselection has occurred for the relay terminal device; a relay terminal device switchover has occurred; the third timer has expired; PC5 connection establishment has failed; or the PC5 wireless link has failed.

[0133] In some embodiments, as shown in Figure 11, the method may further include the following: 1102: If the addition or modification of an indirect path fails, the remote terminal device will use the previous single path setting, the direct path setting in the indirect path addition or modification message, or the default setting.

[0134] For example, a remote terminal device may use the direct path settings prior to receiving an RRC reset message for adding or changing an indirect path (also known as an RRC reset message for adding or changing an indirect path), or use the direct path settings contained in the RRC reset message for adding or changing an indirect path (also known as an RRC reset message for adding or changing an indirect path, or an indirect path addition or modification message), or use predefined default settings. Among these settings, the settings may include access layer settings, for example, the settings may include at least one of the following: special cell (SpCell) settings, secondary cell (SCell) settings, wireless bearer settings, security settings, RLC bearer settings, logical channel settings, wireless link failure (RLF) timer settings, etc.

[0135] In some embodiments, if the addition or modification of an indirect path is successful, the remote terminal device uses the settings in the RRC reset message for the addition or modification of the indirect path.

[0136] In some embodiments, 1102 may be executed before 1101. For example, if the addition or modification of an indirect path fails, the remote terminal device may first use the previous single path setting, or the direct path setting in the indirect path addition or modification message, or the default setting (1102), and then send failure information to the network device or initiate the RRC re-establishment procedure (1101). For example, 1101 may send the failure information using the setting in 1002. The present invention is not limited thereto, and 1101 and 1102 may have other execution orders. For example, 1101 and 1102 may be executed simultaneously, or 1102 may be executed after 1101.

[0137] In some embodiments, as shown in Figure 11, the method may further include the following: 1103: The remote terminal device maintains a PC5-RRC connection with the relay terminal device, or releases a PC5-RRC connection with the relay terminal device; and / or 1104: A remote terminal device initiates relay reselection or sends a discovery message; and / or 1105: A remote terminal device reports information about other relay terminal devices to a network device.

[0138] In some embodiments, information on the other relay terminal equipment may include the markings of the other relay terminal equipment and / or measurement results for the other relay terminal equipment. These measurement results are, for example, SL-RSRP (sidelink reference signal received power) and SD-RSRP (sidelink discovery reference signal received power).

[0139] The embodiments described above are for illustrative purposes to illustrate embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the embodiments described above. For example, the embodiments described above may be used individually, or a combination of several of the embodiments described above may be used.

[0140] In the above embodiment, if the addition or modification of an indirect path fails, the remote terminal device sends failure information to the network device or initiates an RRC re-establishment procedure. This allows the network device to know whether the remote terminal device successfully added or modified the indirect path, ensuring that the remote terminal device and the network device have a consistent understanding of the remote terminal device's configuration and avoiding subsequent configuration conflicts or errors.

[0141] <Example of the fourth side view> In this embodiment of the present invention, a multi-path communication method is provided, which is applied to network equipment. The same description as in the first embodiment is omitted here.

[0142] Figure 13 shows a multi-path communication method in an embodiment of the present invention. As shown in Figure 13, the method includes the following, namely, 1301: Network equipment sends an RRC reconfiguration message to a remote terminal device via a direct path to add or change an indirect path; and 1302: The network device receives the RRC reconfiguration completion message from the remote terminal device via the direct path.

[0143] Figure 13 above is provided to illustrate an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between each operation (step) can be appropriately adjusted, or some operations can be appropriately increased or decreased. Those skilled in the art can make appropriate modifications based on the above description without being limited to the description in Figure 13.

[0144] In some embodiments, the RRC reset completion message is sent at at least one of the following times, i.e., After the remote terminal device has performed the corresponding settings based on the RRC reset message; After the aforementioned remote terminal device establishes a PC5 connection with the relay terminal device; After the remote terminal device sends a PC5-RRC message to the relay terminal device; After the remote terminal device sends the PC5-RR trigger to the relay terminal device; After the remote terminal device receives instruction information for transmission from the relay terminal device; or After the first timer for the indirect path addition or modification procedure is stopped That is the case.

[0145] In some embodiments, the PC5-RRC message includes at least one of the following: RemoteUEInformationSidelink; RRCReconfigurationSidelink; RRCReconfigurationCompleteSidelink; UEAssistanceInformationSidelink; or New PC5-RRC message That is the case.

[0146] In some embodiments, the PC5-RRC trigger is used to cause the relay terminal device to enter the RRC_Connected state.

[0147] In some embodiments, the instruction information includes information indicating that the relay terminal device has entered the RRC_Connected state.

[0148] In some embodiments, the first timer is activated when the remote terminal device receives an RRC reset message for adding or changing the indirect path.

[0149] In some embodiments, the first timer is stopped under a first condition, the first condition includes at least one of the following: The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information for transmission from the relay terminal device.

[0150] In some embodiments, the PC5-S message includes at least one of the following: Message regarding the discovery; or Direct communication request / response message That is the case.

[0151] In some embodiments, the message relating to the discovery includes at least one of the following: discovery solicitation; or Discovery report That is the case.

[0152] In some embodiments, as shown in Figure 13, the method further includes the following: 1303: After the remote terminal device establishes a PC5 connection with the relay terminal device, the network device further receives the RRC reconfiguration completion message transmitted by the remote terminal device via an indirect path.

[0153] For example, when a duplication SRB1 or split SRB1 is configured as an indirect path, network equipment will also receive an RRC reconfiguration completion message via the indirect path, and in the RRC reconfiguration message for adding or changing an indirect path, SRB1 will be configured as a duplication or split radio bearer (split RB).

[0154] The embodiments described above are for illustrative purposes to illustrate embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the embodiments described above. For example, the embodiments described above may be used individually, or a combination of several of the embodiments described above may be used.

[0155] In the above embodiment, the network device sends an RRC reconfiguration message to the remote terminal device via a direct path to add or change an indirect path, and receives an RRC reconfiguration completion message from the remote terminal device via a direct path. This allows the network device to understand whether the remote terminal device has successfully performed the configuration in the RRC reconfiguration message or successfully added or changed an indirect path. As a result, the remote terminal device and the network device have a consistent understanding of the remote terminal device's configuration, which can prevent subsequent configuration conflicts or errors.

[0156] <Example of the fifth side> In this embodiment of the present invention, a multi-path communication method is provided and is applied to network equipment. Here, the same content as in the second embodiment is omitted. The fifth embodiment can be implemented independently, or it can be implemented in combination with the fourth embodiment.

[0157] Figure 14 shows a multi-path communication method in an embodiment of the present invention. As shown in Figure 14, the communication method includes the following, namely, 1401: If the second condition or the second timer stops, the network device shall consider the addition or modification of the indirect path to be successful, or the network device shall perform any operations related to the success of the addition or modification of the indirect path.

[0158] Figure 14 above is provided to illustrate an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between each operation (step) can be appropriately adjusted, or some operations can be appropriately increased or decreased. Those skilled in the art can make appropriate modifications based on the above description without being limited to the description in Figure 14.

[0159] In some embodiments, the operations relating to the successful addition or modification of the indirect path include the network equipment receiving an RRC reconfiguration completion message or the indirect path receiving uplink data.

[0160] In some embodiments, the second timer is stopped under the second condition, the second condition includes at least one of the following: The RRC reset completion message has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information for transmission from the relay terminal device.

[0161] In some embodiments, the second timer is activated when the remote terminal device receives an RRC message for adding or modifying an indirect path.

[0162] In some embodiments, as shown in Figure 14, the method further includes the following: 1402: When the second timer expires, the network device considers the addition or modification of the indirect path to have failed, or performs any related operations related to the failure of the addition or modification of the indirect path.

[0163] In some embodiments, the operations related to the failure of adding or modifying the indirect path include receiving information about the failure of the remote terminal device transmission or initiating the RRC re-establishment procedure.

[0164] The embodiments described above are for illustrative purposes to illustrate embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the embodiments described above. For example, the embodiments described above may be used individually, or a combination of several of the embodiments described above may be used.

[0165] In the embodiment described above, when the second condition or the second timer stops, the network device considers the addition or modification of the indirect path to be successful, or performs the relevant operations related to the successful addition or modification of the indirect path. This allows the network device to determine, based on the second condition or the second timer, whether the operation of adding or modifying the indirect path was successful, or whether it can perform the relevant operations related to the successful addition or modification of the indirect path, thereby preventing the network device from performing inappropriate operations.

[0166] <Example of the sixth side view> An embodiment of the present invention provides a multi-path communication method, which is applied to network equipment. The description of the same content as in the third embodiment is omitted here. The sixth embodiment can be implemented independently, or it can be implemented in combination with the fourth and / or fifth embodiments.

[0167] Figure 15 shows a multi-path communication method in an embodiment of the present invention. As shown in Figure 15, the method includes the following, namely, 1501: The network device receives failure information transmitted by the terminal device when the addition or modification of the indirect path fails.

[0168] Figure 15 above is provided to illustrate an embodiment of the present invention, but the present invention is not limited thereto. For example, the execution order between each operation (step) can be appropriately adjusted, or some operations can be appropriately increased or decreased. Those skilled in the art can make appropriate modifications based on the above description without being limited to the description in Figure 15.

[0169] In some embodiments, the failure of adding or modifying the indirect pathway includes, namely, The relay terminal device failed to enter a connected state; The RRC connection to the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing.

[0170] In some embodiments, the third timer is stopped under a third condition, the third condition includes at least one of the following: The RRC reset completion message has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information for transmission from the relay terminal device.

[0171] In some embodiments, network devices can receive the failure information via a direct path.

[0172] In some embodiments, the failure information is transmitted after the remote terminal device receives notification of transmission from the relay terminal device.

[0173] In some embodiments, the notification includes at least one of the following: The RRC connection establishment or recovery procedure of the aforementioned relay terminal equipment has failed or been rejected; Cell reselection or switching has occurred in the aforementioned relay terminal equipment; or The serving cell of the relay terminal device included in the discovery message of the relay terminal device is different from the serving cell connected to the remote terminal device by the direct path, or the serving base station of the relay terminal device included in the discovery message is different from the serving base station connected to the remote terminal device by the direct path.

[0174] In some embodiments, the failure information is included in the RRC message or a lower-level instruction.

[0175] In some embodiments, the RRC message includes at least one of the following: sidelink UE Information message; SCG failure information message; or New RRC message That is the case.

[0176] In some embodiments, the instruction of the lower layer includes at least one of the following: PDCP control PDU; RLC control PDU; or MAC CE That is the case.

[0177] In some embodiments, the failure information includes the type of failure and / or the cause of the failure.

[0178] In some embodiments, the failure type and / or cause of failure includes at least one of the following: The relay terminal device failed to enter a connected state; The RRC connection to the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing.

[0179] The embodiments described above are for illustrative purposes to illustrate embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the embodiments described above. For example, the embodiments described above may be used individually, or a combination of several of the embodiments described above may be used.

[0180] In the above embodiment, if the addition or modification of an indirect path fails, the network equipment receives failure information for remote terminal equipment transmission or initiates an RRC re-establishment procedure, thereby enabling the network equipment to understand whether the remote terminal equipment successfully added or modified the indirect path. This ensures that the remote terminal equipment and the network equipment have a consistent understanding of the remote terminal equipment's configuration, thus avoiding subsequent configuration conflicts or errors.

[0181] <Example of the seventh side view> An embodiment of the present invention provides a multi-path communication device. The device may be, for example, a remote terminal device, or one or more components or assemblies arranged on a remote terminal device, and the description of the same content as in the embodiment of the first aspect is omitted here.

[0182] Figure 16 shows a multi-path communication device in an embodiment of the present invention. As shown in Figure 16, the multi-path communication device 1600 includes the following, namely, Receiving unit 1601: Receives RRC reconfiguration messages for adding or changing indirect paths for network equipment transmission via direct paths; and Transmitting unit 1602: Sends an RRC reconfiguration completion message to the network device via the direct path.

[0183] In some embodiments, the RRC reset completion message is sent at at least one of the following times, i.e., After the remote terminal device has performed the corresponding settings based on the RRC reset message; After the aforementioned remote terminal device establishes a PC5 connection with the relay terminal device; After the remote terminal device sends a PC5-RRC message to the relay terminal device; After the remote terminal device transmits the PC5-RRC trigger to the relay terminal device; After the remote terminal device receives instruction information for transmission from the relay terminal device; or After the first timer for the indirect path addition or modification procedure is stopped That is the case.

[0184] In some embodiments, the PC5-RRC message includes at least one of the following: RemoteUEInformationSidelink; RRCReconfigurationSidelink; RRCReconfigurationCompleteSidelink; UEAssistanceInformationSidelink; or New PC5-RRC message That is the case.

[0185] In some embodiments, the PC5-RRC trigger is used to cause the relay terminal device to enter the RRC_Connected state.

[0186] In some embodiments, the instruction information includes information indicating that the relay terminal device has entered the RRC_Connected state.

[0187] In some embodiments, the first timer is activated when the remote terminal device receives an RRC reset message for adding or changing the indirect path.

[0188] In some embodiments, the first timer is stopped under a first condition, the first condition includes at least one of the following: The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information for transmission from the relay terminal device.

[0189] In some embodiments, the PC5-S message includes at least one of the following: Message regarding the discovery; or Direct communication request / response message That is the case.

[0190] In some embodiments, the message relating to the discovery includes at least one of the following: discovery solicitation; or Discovery report That is the case.

[0191] In some embodiments, after the remote terminal device establishes a PC5 connection with the relay terminal device, the transmitting unit 1602 further transmits the RRC reconfiguration completion message via an indirect path.

[0192] The embodiments described above are for illustrative purposes to illustrate embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the embodiments described above. For example, the embodiments described above may be used individually, or a combination of several of the embodiments described above may be used.

[0193] Although only the individual components or modules relating to the present invention have been described above, the present invention is not limited to these. The multi-path communication device 1600 may further include other components or modules, and the specific details of these components or modules can be found in the relevant technologies.

[0194] Furthermore, for convenience, Figure 16 only shows the connection relationships or signal directions between each component or module, but various related technologies such as bus connections may be employed so that those skilled in the art can understand them. The above-mentioned components or modules may be realized by hardware such as processors, memory devices, transmitters, and receivers, but the implementation of the present invention is not limited to these.

[0195] In the embodiment described above, when the second condition or the second timer stops, the remote terminal device considers the addition or modification of the indirect path to be successful, or performs the relevant operations related to the successful addition or modification of the indirect path. This allows the remote terminal device to determine, based on the second condition or the second timer, whether the operation of adding or modifying the indirect path was successful, or whether it can perform the relevant operations related to the successful addition or modification of the indirect path, thereby preventing the remote terminal device from performing inappropriate operations.

[0196] <Example of the eighth side view> An embodiment of the present invention provides a multi-path communication device. This device may be, for example, a remote terminal device, or one or more components or assemblies located on a remote terminal device. The description of the embodiments described in the second aspect is omitted here.

[0197] Figure 17 shows a multi-path communication device in an embodiment of the present invention. As shown in Figure 17, the multi-path communication device 1700 includes the following, namely, Processing unit 1701: If the second condition or the second timer stops, the addition or modification of the indirect path is deemed successful, or related operations are performed regarding the success of the addition or modification of the indirect path.

[0198] In some embodiments, the operations related to the successful addition or modification of the indirect path include the RRC layer of the remote terminal device passing an RRC reset completion message to a lower layer for transmission, or the indirect path transmitting uplink data.

[0199] In some embodiments, the second timer is stopped under the second condition, the second condition includes at least one of the following: The RRC reset completion message has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information for transmission from the relay terminal device.

[0200] In some embodiments, the second timer is activated when the remote terminal device receives an RRC message for adding or modifying an indirect path.

[0201] In some embodiments, when the second timer expires, the processing unit considers that the addition or modification of the indirect path has failed, or performs related operations related to the failure of the addition or modification of the indirect path.

[0202] In some embodiments, the associated operations related to the failure of adding or modifying the indirect path include sending failure information to the network equipment or initiating an RRC re-establishment procedure.

[0203] The embodiments described above are for illustrative purposes to illustrate embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the embodiments described above. For example, the embodiments described above may be used individually, or a combination of several of the embodiments described above may be used.

[0204] Although only the individual components or modules relating to the present invention have been described above, the present invention is not limited to these. The multi-path communication device 1700 may further include other components or modules, and the specific details of these components or modules can be found in the relevant technologies.

[0205] Furthermore, for convenience, Figure 17 only shows the connection relationships or signal directions between each component or module, but various related technologies such as bus connections may be employed so that those skilled in the art can understand them. The above-mentioned components or modules may be realized by hardware such as processors, memory devices, transmitters, and receivers, but the implementation of the present invention is not limited to these.

[0206] In the embodiment described above, when the second condition or the second timer stops, the remote terminal device considers the addition or modification of the indirect path to be successful, or performs the relevant operations related to the successful addition or modification of the indirect path. This allows the remote terminal device to determine, based on the second condition or the second timer, whether the operation of adding or modifying the indirect path was successful, or whether it can perform the relevant operations related to the successful addition or modification of the indirect path, thereby preventing the remote terminal device from performing inappropriate operations.

[0207] <Example of the ninth side view> An embodiment of the present invention provides a multi-path communication device. The device may be, for example, a remote terminal device, or one or more components or assemblies arranged on a remote terminal device, and the description of the same content as in the embodiment of the third aspect is omitted here.

[0208] Figure 18 shows a multi-path communication device in an embodiment of the present invention. As shown in Figure 18, the multi-path communication device 1800 includes the following, namely, Processing unit 1801: If the addition or modification of an indirect path fails, it sends failure information to the network equipment or initiates the RRC re-establishment procedure.

[0209] In some embodiments, the failure of adding or modifying the indirect pathway includes, namely, The relay terminal device failed to enter a connected state; The RRC connection to the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing.

[0210] In some embodiments, the third timer is stopped under a third condition, the third condition includes at least one of the following: The RRC reset completion message has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information for transmission from the relay terminal device.

[0211] In some embodiments, the remote terminal device may transmit failure information via a direct path.

[0212] In some embodiments, the failure information is transmitted after the remote terminal device receives notification of transmission from the relay terminal device.

[0213] In some embodiments, the notification includes at least one of the following, namely, the RRC connection establishment or recovery procedure of the relay terminal device has failed or has been rejected; cell reselection or switching has occurred in the relay terminal device; and the serving cell of the relay terminal device included in the discovery message of the relay terminal device is different from the serving cell to which the remote terminal device is connected by the direct path, or the serving base station of the relay terminal device included in the discovery message is different from the serving base station to which the remote terminal device is connected by the direct path.

[0214] In some embodiments, the failure information is included in the RRC message or the lower layer indication.

[0215] In some embodiments, the RRC message includes at least one of the following, namely, sidelink UE Information message; SCG failure information message; or a new RRC message is.

[0216] In some embodiments, the lower layer indication includes at least one of the following, namely, PDCP control PDU; RLC control PDU; or MAC CE is.

[0217] In some embodiments, the failure information includes a failure type and / or a failure cause.

[0218] In some embodiments, the failure type and / or the failure cause includes at least one of the following, namely, the relay terminal device has failed to enter the connected state; the RRC connection of the relay terminal device has been rejected; The relay terminal device is changing the serving cell or the serving base station; Cell selection has occurred in the relay terminal device; Cell reselection has occurred in the relay terminal device; A switchover has occurred in the relay terminal device; The third timer has expired; The PC5 connection establishment has failed; or The PC5 radio link has failed.

[0219] In some embodiments, when the addition or change of the indirect path fails, the processing unit 1801 uses the previous single path setting, or uses the direct path setting in the indirect path addition or change message, or uses the default setting.

[0220] In some embodiments, the processing unit 1801 maintains the PC5-RRC connection with the relay terminal device, or releases the PC5-RRC connection with the relay terminal device; and / or The processing unit 1801 starts relay reselection, or transmits a message regarding discovery; and / or The processing unit 1801 reports information of other relay terminal devices to the network device.

[0221] In some embodiments, the information of the other relay terminal device includes the identifier of the other relay terminal device and / or the measurement result for the other relay terminal device.

[0222] Each of the above embodiments is for illustratively explaining the embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be further made based on each of the above embodiments. For example, each of the above embodiments may be used alone, or a plurality of the above embodiments may be combined.

[0223] Although only the individual components or modules relating to the present invention have been described above, the present invention is not limited to these. The multi-path communication device 1800 may further include other components or modules, and the specific details of these components or modules can be found in the relevant technologies.

[0224] Furthermore, for convenience, Figure 18 only shows the connection relationships or signal directions between each component or module, but various related technologies such as bus connections may be used so that those skilled in the art can understand them. The above-mentioned components or modules may be realized by hardware such as processors, memory devices, transmitters, and receivers, but the implementation of the present invention is not limited to these.

[0225] In the above embodiment, if the addition or modification of an indirect path fails, the remote terminal device sends failure information to the network device or initiates an RRC re-establishment procedure, thereby allowing the network device to understand whether the remote terminal device successfully added or modified the indirect path. This ensures that the remote terminal device and the network device have a consistent understanding of the remote terminal device's configuration, thus avoiding subsequent configuration conflicts or errors.

[0226] <Example of the tenth side> An embodiment of the present invention provides a multi-path communication device. This device may be, for example, a network device, or one or more components or assemblies arranged in a network device, and the same description as in the embodiment of the fourth aspect is omitted here.

[0227] Figure 19 shows a multi-path communication device in an embodiment of the present invention. As shown in Figure 19, the multi-path communication device 1900 includes the following, namely, Transmitter unit 1901: Sends an RRC reset message to a remote terminal device via a direct path for adding or changing an indirect path; and Receiving unit 1902: Receives the RRC reset completion message from the remote terminal device via the direct path.

[0228] In some embodiments, the RRC reconfiguration completion message is transmitted at at least one of the following times, namely, after the remote terminal device executes the corresponding setting based on the RRC reconfiguration message; after the remote terminal device establishes a PC5 connection with the relay terminal device; after the remote terminal device transmits a PC5-RRC message to the relay terminal device; after the remote terminal device transmits a PC5-RRC trigger to the relay terminal device; after the remote terminal device receives the instruction information for the relay terminal device to transmit; or after the first timer for the indirect path addition or change procedure is stopped That's it.

[0229] In some embodiments, the PC5-RRC message includes at least one of the following, namely, RemoteUEInformationSidelink; RRCReconfigurationSidelink; RRCReconfigurationCompleteSidelink; UEAssistanceInformationSidelink; or New PC5-RRC message That's it.

[0230] In some embodiments, the PC5-RRC trigger is used to cause the relay terminal device to enter the RRC_Connected state.

[0231] In some embodiments, the instruction information includes information indicating that the relay terminal device has entered the RRC_Connected state.

[0232] In some embodiments, the first timer is started when the remote terminal device receives an RRC reconfiguration message for adding or changing the indirect path.

[0233] In some embodiments, the first timer is stopped under a first condition, the first condition includes at least one of the following: The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information for transmission from the relay terminal device.

[0234] In some embodiments, the PC5-S message includes at least one of the following: Message regarding the discovery; or Direct communication request / response message That is the case.

[0235] In some embodiments, the message relating to the discovery includes at least one of the following: discovery solicitation; or Discovery report That is the case.

[0236] In some embodiments, after the remote terminal device establishes a PC5 connection with the relay terminal device, the receiving unit 1902 further receives the RRC reset completion message transmitted by the remote terminal device via an indirect path.

[0237] The embodiments described above are for illustrative purposes to illustrate embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the embodiments described above. For example, the embodiments described above may be used individually, or a combination of several of the embodiments described above may be used.

[0238] Although only the individual components or modules relating to the present invention have been described above, the present invention is not limited to these. The multi-path communication device 1900 may further include other components or modules, and the specific details of these components or modules can be found in the relevant technologies.

[0239] Furthermore, for convenience, Figure 19 only shows the connection relationships or signal directions between each component or module, but various related technologies such as bus connections may be used so that those skilled in the art can understand them. The above-mentioned components or modules may be realized by hardware such as processors, memory devices, transmitters, and receivers, but the implementation of the present invention is not limited to these.

[0240] In the above embodiment, the network device sends an RRC reconfiguration message to the remote terminal device via a direct path to add or change an indirect path, and receives an RRC reconfiguration completion message from the remote terminal device via a direct path. This allows the network device to understand whether the remote terminal device has successfully performed the configuration in the RRC reconfiguration message or successfully added or changed an indirect path. As a result, the remote terminal device and the network device have a consistent understanding of the remote terminal device's configuration, which can prevent subsequent configuration conflicts or errors.

[0241] <Example of the eleventh side> An embodiment of the present invention provides a multi-path communication device. The device may be, for example, a network device, or one or more components or assemblies arranged in a network device, and the description of the same content as in the fifth embodiment is omitted here.

[0242] Figure 20 shows a multi-path communication device in an embodiment of the present invention. As shown in Figure 20, the multi-path communication device 2000 includes the following, namely, Processing unit 2001: If the second condition or the second timer stops, the addition or modification of the indirect path is deemed successful, or related operations are performed regarding the success of the addition or modification of the indirect path.

[0243] In some embodiments, the operations relating to the successful addition or modification of the indirect path include the processing unit receiving an RRC reset completion message or the indirect path receiving uplink data.

[0244] In some embodiments, the second timer is stopped under the second condition, the second condition includes at least one of the following: The RRC reset completion message has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information for transmission from the relay terminal device.

[0245] In some embodiments, the second timer is activated when the remote terminal device receives an RRC message for adding or modifying an indirect path.

[0246] In some embodiments, when the second timer expires, the processing unit considers that the addition or modification of the indirect path has failed, or performs related operations related to the failure of the addition or modification of the indirect path.

[0247] In some embodiments, the operations related to the failure of adding or modifying the indirect path include receiving the failure information of the remote terminal device transmission or initiating the RRC re-establishment procedure.

[0248] The embodiments described above are for illustrative purposes to illustrate embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the embodiments described above. For example, the embodiments described above may be used individually, or a combination of several of the embodiments described above may be used.

[0249] Although only the individual components or modules relating to the present invention have been described above, the present invention is not limited to these. The multi-path communication device 2000 may further include other components or modules, and the specific details of these components or modules can be found in the relevant technologies.

[0250] Furthermore, for convenience, Figure 20 only shows the connection relationships or signal directions between each component or module, but various related technologies such as bus connections may be used so that those skilled in the art can understand them. The above-mentioned components or modules may be realized by hardware such as processors, memory devices, transmitters, and receivers, but the implementation of the present invention is not limited to these.

[0251] In the embodiment described above, when the second condition or the second timer stops, the network device considers the addition or modification of the indirect path to be successful, or performs the relevant operations related to the successful addition or modification of the indirect path. This allows the network device to determine, based on the second condition or the second timer, whether the operation of adding or modifying the indirect path was successful, or whether it can perform the relevant operations related to the successful addition or modification of the indirect path, thereby preventing the network device from performing inappropriate operations.

[0252] <Example of the twelfth side> An embodiment of the present invention provides a multi-path communication device. The device may be, for example, a network device, or one or more components or assemblies arranged in a network device, and the description of the same content as in the sixth embodiment is omitted here.

[0253] Figure 21 shows a multi-path communication device in an embodiment of the present invention. As shown in Figure 21, the multi-path communication device 2100 includes the following, namely, Receiving unit 2101: Receives failure information transmitted by terminal equipment when the addition or modification of an indirect path fails.

[0254] In some embodiments, the failure of adding or modifying the indirect pathway includes, namely, The relay terminal device failed to enter a connected state; The RRC connection to the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing.

[0255] In some embodiments, the third timer is stopped under a third condition, the third condition includes at least one of the following: The RRC reset completion message has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information for transmission from the relay terminal device.

[0256] In some embodiments, the receiving unit 2101 receives the failure information via a direct path.

[0257] In some embodiments, the failure information is transmitted after the remote terminal device receives notification of transmission from the relay terminal device.

[0258] In some embodiments, the notification includes at least one of the following: The RRC connection establishment or recovery procedure of the aforementioned relay terminal equipment has failed or been rejected; Cell reselection or switching has occurred in the aforementioned relay terminal equipment; or The serving cell of the relay terminal device included in the discovery message of the relay terminal device is different from the serving cell connected to the remote terminal device by the direct path, or the serving base station of the relay terminal device included in the discovery message is different from the serving base station connected to the remote terminal device by the direct path.

[0259] In some embodiments, the failure information is included in the RRC message or a lower-level instruction.

[0260] In some embodiments, the RRC message includes at least one of the following: sidelink UE Information message; SCG failure information message; or New RRC message That is the case.

[0261] In some embodiments, the instruction of the lower layer includes at least one of the following: PDCP control PDU; RLC control PDU; or MAC CE That is the case.

[0262] In some embodiments, the failure information includes the type of failure and / or the cause of the failure.

[0263] In some embodiments, the failure type and / or cause of failure includes at least one of the following: The relay terminal device failed to enter a connected state; The RRC connection to the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing.

[0264] The embodiments described above are for illustrative purposes to illustrate embodiments of the present invention, but the present invention is not limited thereto, and appropriate modifications may be made based on the embodiments described above. For example, the embodiments described above may be used individually, or a combination of several of the embodiments described above may be used.

[0265] Although only the individual components or modules relating to the present invention have been described above, the present invention is not limited to these. The multi-path communication device 1800 may further include other components or modules, and the specific details of these components or modules can be found in the relevant technologies.

[0266] Furthermore, for convenience, Figure 18 only shows the connection relationships or signal directions between each component or module, but various related technologies such as bus connections may be used so that those skilled in the art can understand them. The above-mentioned components or modules may be realized by hardware such as processors, memory devices, transmitters, and receivers, but the implementation of the present invention is not limited to these.

[0267] In the above embodiment, if the addition or modification of an indirect path fails, the network equipment receives failure information for remote terminal equipment transmission or initiates an RRC re-establishment procedure. This allows the network equipment to determine whether the remote terminal equipment successfully added or modified the indirect path, ensuring that the remote terminal equipment and the network equipment have a consistent understanding of the remote terminal equipment's configuration and avoiding subsequent configuration conflicts or errors.

[0268] <Example of the thirteenth side> An embodiment of the present invention provides a communication system, which can be found in Figure 1. Here, the same information as in the first to twelfth embodiments is omitted.

[0269] In some embodiments, the communication system 100 may include a remote terminal device 101 and / or a relay terminal device 102 and / or a network device 103.

[0270] In embodiments of the present invention, the remote terminal device 101 is configured to perform the multi-path communication method described in the embodiments of the first and / or second and / or third aspects, the details of which are hereby combined and their detailed description is omitted here.

[0271] In embodiments of the present invention, the network device 103 is configured to perform the multipath communication method described in the fourth and / or fifth and / or sixth embodiment, the details of which are combined here, and a detailed explanation is omitted here.

[0272] In embodiments of the present invention, a remote terminal device is further provided.

[0273] Figure 22 shows the configuration of a terminal device in an embodiment of the present invention. The terminal device may be a remote terminal device. As shown in Figure 22, the terminal device 2200 may include a processor 2201 and a memory 2202, the memory 2202 storing data and programs and connected to the processor 2201. Note that this figure is merely illustrative, and telecommunications functions or other functions may be realized by supplementing or substituting this configuration with other types of configurations.

[0274] For example, the processor 2201 may be configured to execute a program to implement the multi-path communication method described in the embodiment of the first side. For example, the processor 2201 may be configured to perform the following operations: the remote terminal device receives an RRC reset message via the direct path for adding or changing an indirect path for network device transmission; and the remote terminal device sends an RRC reset completion message to the network device via the direct path.

[0275] Furthermore, for example, the processor 2201 may be configured to execute a program to implement the multi-path communication method described in the embodiment of the second side. For example, the processor 2201 may be configured to perform the following operations: when the second condition or the second timer stops, the remote terminal device considers the addition or modification of the indirect path to be successful, or the remote terminal device performs operations related to the success of the addition or modification of the indirect path.

[0276] Furthermore, for example, the processor 2201 may be configured to execute a program to implement the multi-path communication method described in the embodiment of the third side. For example, the processor 2201 may be configured to perform the following operations: if the addition or modification of an indirect path fails, the remote terminal device transmits failure information to the network device or initiates an RRC re-establishment procedure.

[0277] As shown in Figure 22, the terminal device 2200 may further include a communication module 2203, an input unit 2204, a display unit 2205, a power supply 2206, and the like. Since the functions of the aforementioned components are similar to those in the prior art, a detailed explanation is omitted here. Note that the terminal device 2200 does not need to include all the components shown in Figure 22; the aforementioned components are not mandatory. Furthermore, the terminal device 2200 may also include components not shown in Figure 22; for these, please refer to related technologies.

[0278] The embodiments of the present invention further provide network equipment, which may be, for example, a base station, but the present invention is not limited thereto and may also include other network equipment.

[0279] Figure 23 shows the configuration of a network device in an embodiment of the present invention. As shown in Figure 23, the network device 2300 may include a processor 2301 (for example, a central processor CPU) and a memory unit 2302, the memory unit 2302 being connected to the processor 2301. The memory unit 2302 can store various types of data, and can also store programs for information processing, and can execute these programs under the control of the processor 2301.

[0280] For example, the processor 2301 may be configured to execute a program to implement the multipath communication method described in the embodiment of the fourth side. For example, the processor 2301 may be configured to do the following: the network device sends an RRC reset message to the remote terminal device via the direct path for the addition or modification of an indirect path; and the network device receives an RRC reset completion message from the remote terminal device via the direct path.

[0281] Furthermore, for example, the processor 2301 may be configured to execute a program to implement the multi-path communication method described in the fifth embodiment. For example, the processor 2301 may be configured to do the following: when the second condition or the second timer stops, the network equipment considers the addition or modification of the indirect path to be successful, or the network equipment performs related operations related to the success of the addition or modification of the indirect path.

[0282] Furthermore, for example, the processor 2301 may be configured to execute a program to implement the multi-path communication method described in the sixth embodiment. For example, the processor 2301 may be configured to do the following: namely, the network equipment receives failure information transmitted by the terminal equipment when the addition or modification of an indirect path fails.

[0283] Furthermore, as shown in Figure 23, the network device 2300 may also include a transceiver 2303, an antenna 2305, etc., and the functions of the above-mentioned components are the same as in the prior art, so a detailed explanation is omitted here. Note that the network device 2300 does not need to include all the components shown in Figure 23, and the network device 2300 may also include components not shown in Figure 23, for which prior art can be referred.

[0284] In embodiments of the present invention, a computer-readable program is further provided, and when the program is executed on a remote terminal device, the program causes the computer to execute the multi-path communication method described in the embodiments of the first and / or second and / or third aspects on the remote terminal device.

[0285] In embodiments of the present invention, a storage medium storing a computer-readable program is further provided, wherein the computer-readable program causes a computer to execute the multi-path communication method described in the first and / or second and / or third embodiment on a remote terminal device.

[0286] In embodiments of the present invention, a computer-readable program is further provided, in which, when the program is executed on a network device, the program causes the computer to execute the multi-path communication method described in the fourth and / or fifth and / or sixth embodiment on the network device.

[0287] In embodiments of the present invention, a storage medium storing a computer-readable program is further provided, wherein the computer-readable program causes a computer to execute the multi-path communication method described in the fourth and / or fifth and / or sixth embodiment on a network device.

[0288] Furthermore, the above-described apparatus and method may be implemented by software or hardware, or by a combination of hardware and software. The present invention further relates to a computer-readable program as described below, that is, the program, when executed by a logic component, causes the logic component to implement the above-described apparatus or component, or to the logic component to implement each of the above-described method or step. The logic component may be, for example, an FPGA (Field Programmable Gate Array), a microprocessor, or a processor used in a computer. The present invention further relates to a storage medium storing the above-described program, for example, a hard disk, a magnetic disk, an optical hard disk, a DVD, a flash memory, etc.

[0289] Furthermore, one or more combinations of the functional blocks shown in the drawings and / or one or more combinations of functional blocks may be implemented as a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic component, discrete gate or transistor logic component, discrete hardware assembly or any other suitable combination for performing the functions described herein. Also, one or more combinations of the functional blocks shown in the drawings and / or one or more combinations of functional blocks may further be configured as a combination of computing devices, for example, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors connected to a DSP by communication or any other combination of any other configuration.

[0290] Although preferred embodiments of the present invention have been described above, the present invention is not limited to such embodiments, and any modifications to the present invention that do not deviate from the spirit of the invention fall within the technical scope of the present invention.

[0291] Furthermore, the following additional information is disclosed regarding the above-mentioned embodiments.

[0292] <Method on the remote terminal device side> (Note 1) A multi-path communication method, applicable to remote terminal equipment, wherein the method is The remote terminal device receives an RRC reset message via a direct path for adding or changing an indirect path for network device transmission; and The remote terminal device includes sending an RRC reconfiguration completion message to the network device via the direct path.

[0293] (Note 2) The method described in Appendix 2, The RRC reset completion message is sent at at least one of the following times, i.e., After the remote terminal device has performed the corresponding settings based on the RRC reset message; After the aforementioned remote terminal device establishes a PC5 connection with the relay terminal device; After the remote terminal device sends a PC5-RRC message to the relay terminal device; After the remote terminal device transmits the PC5-RRC trigger to the relay terminal device; After the remote terminal device receives instruction information for transmission from the relay terminal device; or After the first timer for the indirect path addition or modification procedure is stopped It is, something.

[0294] (Note 3) The method described in Appendix 2, The aforementioned PC5-RRC message includes at least one of the following: RemoteUEInformationSidelink; RRCReconfigurationSidelink; RRCReconfigurationCompleteSidelink; UEAssistanceInformationSidelink; or New PC5-RRC message It is, something.

[0295] (Note 4) The method described in Appendix 2, The aforementioned PC5-RRC trigger is used to cause the relay terminal device to enter the RRC_Connected state.

[0296] (Note 5) The method described in Appendix 2, The instruction information includes information indicating that the relay terminal device has entered the RRC_Connected state.

[0297] (Note 6) The method described in Appendix 2, The first timer is activated when the remote terminal device receives an RRC reset message for adding or changing the indirect path.

[0298] (Note 7) The method described in Appendix 2, The first timer is stopped under a first condition, the first condition includes at least one of the following: The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information transmitted by the relay terminal device.

[0299] (Note 8) The method described in Appendix 7, The aforementioned PC5-S message includes at least one of the following: Message regarding the discovery; or Direct communication request / response message It is, something.

[0300] (Note 9) The method described in Appendix 8, The message relating to the aforementioned discovery includes at least one of the following: discovery solicitation; or Discovery report It is, something.

[0301] (Note 10) The method described in Appendix 1, further, After the remote terminal device establishes a PC5 connection with the relay terminal device, the remote terminal device further includes transmitting the RRC reconfiguration completion message via an indirect path.

[0302] (Note 11) A multi-path communication method, applicable to remote terminal equipment, wherein the method is If the second condition or the second timer stops, the remote terminal device considers the addition or modification of the indirect path to be successful, or the remote terminal device performs related operations relating to the success of the addition or modification of the indirect path.

[0303] (Note 12) The method described in Appendix 11, The relevant operations relating to the successful addition or modification of the aforementioned indirect pathway are as follows: This includes the RRC layer of the remote terminal device passing an RRC reset completion message to a lower layer for transmission, or transmitting uplink data via the indirect path.

[0304] (Note 13) The method described in Appendix 11, The second timer is stopped under the second condition, the second condition includes at least one of the following: The RRC reset completion message has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information transmitted by the relay terminal device.

[0305] (Note 14) The method described in Appendix 11, The second timer is activated when the remote terminal device receives an RRC message for adding or modifying an indirect path.

[0306] (Note 15) The method described in Appendix 11, When the second timer expires, the remote terminal device considers the addition or modification of the indirect path to have failed, or performs related operations related to the failure of the addition or modification of the indirect path.

[0307] (Note 16) The method described in Appendix 15, The relevant operations concerning the failure to add or modify the aforementioned indirect pathway are as follows: This includes sending failure information to the aforementioned network equipment or initiating an RRC re-establishment procedure.

[0308] (Note 17) A multi-path communication method, applicable to remote terminal equipment, wherein the method is This includes, if the addition or modification of an indirect path fails, the remote terminal device transmitting failure information to the network device or initiating an RRC re-establishment procedure.

[0309] (Note 18) The method described in Appendix 17, Failure to add or modify the aforementioned indirect pathway includes, namely, The relay terminal device failed to enter a connected state; The RRC connection to the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing.

[0310] (Note 19) The method described in Appendix 18, The third timer is stopped under a third condition, the third condition includes at least one of the following: The RRC reset completion message has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information transmitted by the relay terminal device.

[0311] (Note 20) The method described in Appendix 17, The aforementioned failure information is transmitted after the remote terminal device receives notification of transmission from the relay terminal device.

[0312] (Note 21) The method described in Appendix 20, The aforementioned notice includes at least one of the following: The RRC connection establishment or recovery procedure of the aforementioned relay terminal equipment has failed or been rejected; Cell reselection or switching has occurred in the aforementioned relay terminal equipment; and The serving cell of the relay terminal device included in the discovery message of the relay terminal device is different from the serving cell connected to the remote terminal device by the direct path, or the serving base station of the relay terminal device included in the discovery message is different from the serving base station connected to the remote terminal device by the direct path.

[0313] (Note 22) The method described in Appendix 17, The aforementioned failure information is included in the RRC message or lower-level instructions.

[0314] (Note 23) The method described in Appendix 22, The RRC message includes at least one of the following: sidelink UE Information message; SCG failure information message; or New RRC message It is, something.

[0315] (Note 24) The method described in Appendix 22, The lower-level instruction includes at least one of the following: PDCP control PDU; RLC control PDU; or MAC CE It is, something.

[0316] (Note 25) The method described in Appendix 17, The aforementioned failure information includes the type of failure and / or the cause of the failure.

[0317] (Note 26) The method described in Appendix 25, The aforementioned failure type and / or cause of failure includes at least one of the following: The relay terminal device failed to enter a connected state; The RRC connection to the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing.

[0318] (Note 27) The method described in Appendix 17, further, This includes, if the addition or modification of an indirect path fails, the remote terminal device using the previous single path setting, or the direct path setting in the indirect path addition or modification message, or using the default setting.

[0319] (Note 28) The method described in Appendix 17, further, The remote terminal device maintains a PC5-RRC connection with the relay terminal device, or releases a PC5-RRC connection with the relay terminal device; and / or The remote terminal device initiates relay reselection or sends a message regarding discovery; and / or This includes the remote terminal device reporting information about other relay terminal devices to the network device.

[0320] (Note 29) The method described in Appendix 28, The information of the other relay terminal equipment includes the labels of the other relay terminal equipment and / or the measurement results for the other relay terminal equipment.

[0321] <Network device side equipment> (Note 1) A multi-path communication device, applicable to network equipment, the device is A transmitting unit that sends an RRC reset message to a remote terminal device via a direct path for adding or changing an indirect path; and The device includes a receiving unit that receives the RRC reset completion message for the remote terminal equipment transmission via the direct path.

[0322] (Note 2) The apparatus described in Appendix 2, The RRC reset completion message is sent at at least one of the following times, i.e., After the remote terminal device has performed the corresponding settings based on the RRC reset message; After the aforementioned remote terminal device establishes a PC5 connection with the relay terminal device; After the remote terminal device sends a PC5-RRC message to the relay terminal device; After the remote terminal device transmits the PC5-RRC trigger to the relay terminal device; After the remote terminal device receives instruction information for transmission from the relay terminal device; or After the first timer for the indirect path addition or modification procedure is stopped It is, something.

[0323] (Note 3) The apparatus described in Appendix 2, The aforementioned PC5-RRC message includes at least one of the following: RemoteUEInformationSidelink; RRCReconfigurationSidelink; RRCReconfigurationCompleteSidelink; UEAssistanceInformationSidelink; or New PC5-RRC message It is, something.

[0324] (Note 4) The apparatus described in Appendix 2, The aforementioned PC5-RRC trigger is used to cause the relay terminal device to enter the RRC_Connected state.

[0325] (Note 5) The apparatus described in Appendix 2, The instruction information includes information indicating that the relay terminal device has entered the RRC_Connected state.

[0326] (Note 6) The apparatus described in Appendix 2, The first timer is activated when the remote terminal device receives an RRC reset message for adding or changing the indirect path.

[0327] (Note 7) The apparatus described in Appendix 2, The first timer is stopped under a first condition, the first condition includes at least one of the following: The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information transmitted by the relay terminal device.

[0328] (Note 8) The apparatus described in Appendix 7, The aforementioned PC5-S message includes at least one of the following: Message regarding the discovery; or Direct communication request / response message It is, something.

[0329] (Note 9) The apparatus described in Appendix 8, The message relating to the aforementioned discovery includes at least one of the following: discovery solicitation; or Discovery report It is, something.

[0330] (Note 10) The apparatus described in Appendix 1, After the remote terminal device establishes a PC5 connection with the relay terminal device, the receiving unit further receives the RRC reset completion message transmitted by the remote terminal device via an indirect path.

[0331] (Note 11) A multi-path communication device, applicable to network equipment, the device is A device that includes a processing unit that, when the second condition or the second timer stops, deems the addition or modification of an indirect path to be successful, or performs related operations related to the success of the addition or modification of an indirect path.

[0332] (Note 12) The apparatus described in Appendix 11, The relevant operations relating to the successful addition or modification of the aforementioned indirect pathway are as follows: The processing unit has received an RRC reset completion message, or the indirect path has received uplink data.

[0333] (Note 13) The apparatus described in Appendix 11, The second timer is stopped under the second condition, the second condition includes at least one of the following: The RRC reset completion message has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information transmitted by the relay terminal device.

[0334] (Note 14) The apparatus described in Appendix 11, The second timer is activated when the remote terminal device receives an RRC message for adding or modifying an indirect path.

[0335] (Note 15) The apparatus described in Appendix 11, When the second timer expires, the processing unit considers the addition or modification of the indirect path to have failed, or performs related operations related to the failure of the addition or modification of the indirect path.

[0336] (Note 16) The apparatus described in Appendix 15, The relevant operations concerning the failure to add or modify the aforementioned indirect pathway are as follows: This includes receiving information about a failure to transmit from the remote terminal device, or initiating an RRC re-establishment procedure.

[0337] (Note 17) A multi-path communication device, applicable to network equipment, the device is A device including a receiving unit that receives failure information transmitted when the addition or modification of an indirect path fails.

[0338] (Note 18) The apparatus described in Appendix 17, Failure to add or modify the aforementioned indirect pathway includes, namely, The relay terminal device failed to enter a connected state; The RRC connection to the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing.

[0339] (Note 19) The apparatus described in Appendix 18, The third timer is stopped under a third condition, the third condition includes at least one of the following: The RRC reset completion message has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information transmitted by the relay terminal device.

[0340] (Note 20) The apparatus described in Appendix 17, The aforementioned failure information is transmitted after the remote terminal device receives notification of transmission from the relay terminal device.

[0341] (Note 21) The apparatus described in Appendix 20, The aforementioned notice includes at least one of the following: The RRC connection establishment or recovery procedure of the aforementioned relay terminal equipment has failed or been rejected; Cell reselection or switching has occurred in the aforementioned relay terminal equipment; and The serving cell of the relay terminal device included in the discovery message of the relay terminal device is different from the serving cell connected to the remote terminal device by the direct path, or the serving base station of the relay terminal device included in the discovery message is different from the serving base station connected to the remote terminal device by the direct path.

[0342] (Note 22) The apparatus described in Appendix 17, The aforementioned failure information is included in the RRC message or lower-level instructions.

[0343] (Note 23) The apparatus described in Appendix 22, The RRC message includes at least one of the following: sidelink UE Information message; SCG failure information message; or New RRC message It is, something.

[0344] (Note 24) The apparatus described in Appendix 22, The lower-level instruction includes at least one of the following: PDCP control PDU; RLC control PDU; or MAC CE It is, something.

[0345] (Note 25) The apparatus described in Appendix 17, The aforementioned failure information includes the type of failure and / or the cause of the failure.

[0346] (Note 26) The apparatus described in Appendix 25, The aforementioned failure type and / or cause of failure includes at least one of the following: The relay terminal device failed to enter a connected state; The RRC connection to the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing.

[0347] <Method on the network device side> (Note 1) A multi-path communication method, applicable to network equipment, wherein the method is The network device sends an RRC reset message to the remote terminal device via a direct path to add or change an indirect path; and The network device includes receiving the RRC reset completion message for the remote terminal device transmission via the direct path.

[0348] (Note 2) The method described in Appendix 2, The RRC reset completion message is sent at at least one of the following times, i.e., After the remote terminal device has performed the corresponding settings based on the RRC reset message; After the aforementioned remote terminal device establishes a PC5 connection with the relay terminal device; After the remote terminal device sends a PC5-RRC message to the relay terminal device; After the remote terminal device sends the PC5-RR trigger to the relay terminal device; After the remote terminal device receives instruction information for transmission from the relay terminal device; or After the first timer for the indirect path addition or modification procedure has been stopped.

[0349] (Note 3) The method described in Appendix 2, The aforementioned PC5-RRC message includes at least one of the following: RemoteUEInformationSidelink; RRCReconfigurationSidelink; RRCReconfigurationCompleteSidelink; UEAssistanceInformationSidelink; or New PC5-RRC message It is, something.

[0350] (Note 4) The method described in Appendix 2, The aforementioned PC5-RRC trigger is used to cause the relay terminal device to enter the RRC_Connected state.

[0351] (Note 5) The method described in Appendix 2, The instruction information includes information indicating that the relay terminal device has entered the RRC_Connected state.

[0352] (Note 6) The method described in Appendix 2, The first timer is activated when the remote terminal device receives an RRC reset message for adding or changing the indirect path.

[0353] (Note 7) The method described in Appendix 2, The first timer is stopped under a first condition, the first condition includes at least one of the following: The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information transmitted by the relay terminal device.

[0354] (Note 8) The method described in Appendix 7, The aforementioned PC5-S message includes at least one of the following: Message regarding the discovery; or Direct communication request / response message It is, something.

[0355] (Note 9) The method described in Appendix 8, The message relating to the aforementioned discovery includes at least one of the following: discovery solicitation; or Discovery report It is, something.

[0356] (Note 10) The method described in Appendix 1, further, The network device further includes receiving the RRC reconfiguration completion message transmitted by the remote terminal device via an indirect path after the remote terminal device has established a PC5 connection with the relay terminal device.

[0357] (Note 11) A multi-path communication method, applicable to network equipment, wherein the method is If the second condition or the second timer stops, the network equipment considers the addition or modification of the indirect path to be successful, or the network equipment performs related operations relating to the success of the addition or modification of the indirect path.

[0358] (Note 12) The method described in Appendix 11, The relevant operations relating to the successful addition or modification of the aforementioned indirect pathway are as follows: This includes the network equipment receiving an RRC reconfiguration completion message, or receiving uplink data via the indirect path.

[0359] (Note 13) The method described in Appendix 11, The second timer is stopped under the second condition, the second condition includes at least one of the following: The RRC reset completion message has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information transmitted by the relay terminal device.

[0360] (Note 14) The method described in Appendix 11, The second timer is activated when the remote terminal device receives an RRC message for adding or modifying an indirect path.

[0361] (Note 15) The method described in Appendix 11, When the second timer expires, the network device considers the addition or modification of the indirect path to have failed, or performs any related operations related to the failure of the addition or modification of the indirect path.

[0362] (Note 16) The method described in Appendix 15, The relevant operations concerning the failure to add or modify the aforementioned indirect pathway are as follows: This includes receiving information about a failure to transmit from the remote terminal device, or initiating an RRC re-establishment procedure.

[0363] (Note 17) A multi-path communication method, applicable to network equipment, wherein the method is The aforementioned network equipment includes receiving failure information transmitted by terminal equipment when the addition or modification of an indirect path fails.

[0364] (Note 18) The method described in Appendix 17, Failure to add or modify the aforementioned indirect pathway includes, namely, The relay terminal device failed to enter a connected state; The RRC connection to the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing.

[0365] (Note 19) The method described in Appendix 18, The third timer is stopped under a third condition, the third condition includes at least one of the following: The RRC reset completion message has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The aforementioned remote terminal device has received instruction information transmitted by the relay terminal device.

[0366] (Note 20) The method described in Appendix 17, The aforementioned failure information is transmitted after the remote terminal device receives notification of transmission from the relay terminal device.

[0367] (Note 21) The method described in Appendix 20, The aforementioned notice includes at least one of the following: The RRC connection establishment or recovery procedure of the aforementioned relay terminal equipment has failed or been rejected; Cell reselection or switching has occurred in the aforementioned relay terminal equipment; and The serving cell of the relay terminal device included in the discovery message of the relay terminal device is different from the serving cell connected to the remote terminal device by the direct path, or the serving base station of the relay terminal device included in the discovery message is different from the serving base station connected to the remote terminal device by the direct path.

[0368] (Note 22) The method described in Appendix 17, The aforementioned failure information is included in the RRC message or lower-level instructions.

[0369] (Note 23) The method described in Appendix 22, The RRC message includes at least one of the following: sidelink UE Information message; SCG failure information message; or New RRC message It is, something.

[0370] (Note 24) The method described in Appendix 22, The lower-level instruction includes at least one of the following: PDCP control PDU; RLC control PDU; or MAC CE It is, something.

[0371] (Note 25) The method described in Appendix 17, The aforementioned failure information includes the type of failure and / or the cause of the failure.

[0372] (Note 26) The method described in Appendix 25, The aforementioned failure type and / or cause of failure includes at least one of the following: The relay terminal device failed to enter a connected state; The RRC connection to the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing.

Claims

1. A multi-path communication device, which is installed in a remote terminal device, the device is A receiving unit that receives wireless resource control reset messages for adding or changing indirect paths for network equipment transmission via a direct path; and Apparatus including a transmitting unit that transmits a wireless resource control reset completion message to the network equipment via the direct path.

2. The apparatus according to claim 1, The wireless resource control reset completion message is transmitted at at least one of the following times, namely, After the remote terminal device has performed the corresponding settings based on the wireless resource control reset message; After the remote terminal device establishes a connection with the relay terminal device and PC5; After the remote terminal device sends a PC5-RRC message to the relay terminal device; After the remote terminal device transmits the PC5-RRC trigger to the relay terminal device; After the remote terminal device receives instruction information from the relay terminal device; or After the first timer for the indirect path addition or modification procedure is stopped It is a device.

3. The apparatus according to claim 2, The PC5-RRC message includes at least one of the following: Remote User Device Information Sidelink; Wireless resource control reconfiguration sidelink RRCReconfigurationSidelink; Wireless resource control reconfiguration complete Sidelink RRCReconfigurationCompleteSidelink; User device assistance information sidelink; or New PC5-RRC message and / or The PC5-RRC trigger is used to cause the relay terminal device to enter a wireless resource control connection state, and / or The instruction information includes information indicating that the relay terminal device has entered a wireless resource control connection state.

4. The apparatus according to claim 2, The first timer is activated when the remote terminal device receives a wireless resource control reset message for adding or changing the indirect path, and / or The first timer is stopped under a first condition, the first condition includes at least one of the following: The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or A device in which the aforementioned remote terminal device receives instruction information transmitted by a relay terminal device.

5. The apparatus according to claim 4, The aforementioned PC5-S message includes at least one of the following: Message regarding the discovery; or Direct communication request / response message It is a device.

6. The apparatus according to claim 1, The device further transmits the wireless resource control reset completion message via an indirect path after the remote terminal device has established a connection with the relay terminal device and the PC 5.

7. A multi-path communication device, which is installed in a remote terminal device, the device is Apparatus including a processing unit that, when the second condition or second timer stops, deems the addition or modification of an indirect path to be successful, or performs related operations related to the success of the addition or modification of an indirect path.

8. The apparatus according to claim 7, The relevant operations relating to the successful addition or modification of the aforementioned indirect pathway are as follows: The apparatus includes the wireless resource control layer of the remote terminal device passing a wireless resource control reset completion message to a lower layer for transmission, or transmitting uplink data via the indirect path.

9. The apparatus according to claim 7, The second timer is stopped under the second condition, which includes at least one of the following: The message "Wireless resource control reset complete" has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or The remote terminal device has received instruction information for transmission from the relay terminal device, and / or The second timer is activated when the remote terminal device receives a wireless resource control message for adding or modifying an indirect path.

10. The apparatus according to claim 7, A device wherein, when the second timer expires, the processing unit considers the addition or modification of the indirect path to have failed, or performs related operations related to the failure of the addition or modification of the indirect path.

11. The apparatus according to claim 10, The relevant operations concerning the failure to add or modify the aforementioned indirect pathway are as follows: A device that includes transmitting failure information to network equipment or initiating a wireless resource control re-establishment procedure.

12. A multi-path communication device, which is installed in a remote terminal device, the device is An apparatus including a processing unit that transmits failure information to network equipment or initiates a wireless resource control re-establishment procedure if the addition or modification of an indirect path fails.

13. The apparatus according to claim 12, Failure to add or modify the aforementioned indirect pathway includes, namely, The relay terminal device failed to enter a connected state; The wireless resource control connection for the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing on this device.

14. The apparatus according to claim 13, The third timer is stopped under a third condition, the third condition includes at least one of the following: The message "Wireless resource control reset complete" has been successfully sent; The aforementioned remote terminal device has sent a PC5-RRC message to the relay terminal device; The aforementioned remote terminal device has sent a PC5-S message to the relay terminal device; The aforementioned remote terminal device transmits data from the wireless bearer via a relay terminal device; The PC5-RRC message and / or PC5-S message have been successfully transmitted to the relay terminal equipment; The remote terminal device has established a PC5 connection with the relay terminal device; or A device in which the aforementioned remote terminal device receives instruction information transmitted by a relay terminal device.

15. The apparatus according to claim 12, The failure information is transmitted after the remote terminal device receives notification of transmission from the relay terminal device.

16. The apparatus according to claim 15, The aforementioned notice includes at least one of the following: The wireless resource control connection establishment or recovery procedure of the relay terminal equipment has failed or been rejected; Cell reselection or switching has occurred in the aforementioned relay terminal equipment; or A device in which the serving cell of the relay terminal device included in the discovery message of the relay terminal device is different from a serving cell that is directly connected to the remote terminal device by a path, or the serving base station of the relay terminal device included in the discovery message is different from a serving base station that is directly connected to the remote terminal device by a path.

17. The apparatus according to claim 12, The failure information is included in a wireless resource control message or a lower-layer instruction of the device.

18. The apparatus according to claim 17, The aforementioned wireless resource control message includes at least one of the following: Sidelink User Device Information sidelink UE Information message; Secondary cell group failure information SCG failure information message; or New Wireless Resource Control Message and / or The instructions of the lower layer include at least one of the following: PDCP control PDU; RLC control PDU; or MAC CE It is a device.

19. The apparatus according to claim 12, The aforementioned failure information includes a failure type and / or failure cause, and the aforementioned failure type and / or failure cause includes at least one of the following: The relay terminal device failed to enter a connected state; The wireless resource control connection for the relay terminal device has been refused; The relay terminal equipment has changed the serving cell or serving base station; Cell selection has occurred in the relay terminal equipment; Cell reselection has occurred in the relay terminal equipment; A switchover has occurred in the relay terminal equipment; The third timer has expired; PC5 connection establishment failed; or The PC5 wireless link is failing on this device.

20. The apparatus according to claim 12, If the addition or modification of an indirect path fails, the processing unit will use the previous single path setting, or the direct path setting in the indirect path addition or modification message, or the default setting; and / or The processing unit maintains the PC5-RRC connection with the relay terminal equipment, or releases the PC5-RRC connection with the relay terminal equipment; and / or The processing unit initiates relay reselection or transmits a message regarding discovery; and / or The aforementioned processing unit is a device that reports information about other relay terminal devices to network equipment.

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