Methods and apparatuses for relay link change and path switching to relay ue

The patent addresses the lack of details in 3GPP 5G systems for relay link change and path switching by providing a UE that responds to RRC reconfiguration messages to perform necessary changes, enhancing communication coverage and quality.

WO2024073922A9 Publication Date: 2025-03-27LENOVO (BEIJING) LTD
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Patent Information

Application Number
PCT/CN2022/132093
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2022-11-15
Publication Date
2025-03-27

AI Technical Summary

Technical Problem

Current 3GPP 5G wireless systems lack specific details on how to design solutions for relay link change and path switching to a relay UE, which is essential for enhancing communication coverage and quality.

Method used

The proposed solution involves a user equipment (UE) that receives a radio resource control (RRC) reconfiguration message from a network node, which includes indications for relay link change or path switching to a candidate relay UE. The UE then performs the necessary changes or switching based on the message, including starting timers, receiving notification messages, and releasing PC5 links.

Benefits of technology

This solution enables efficient relay link change and path switching, improving the UE's access to better relay nodes and maintaining communication quality by dynamically adapting to changes in network conditions.

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Abstract

Embodiments of the present application relate to methods and apparatuses for a relay link change and path switching to a relay UE. According to an embodiment of the present application, a user equipment (UE) includes a transceiver and a processor coupled to the transceiver; and the processor is configured to: receive a radio resource control (RRC) reconfiguration message from a network node, wherein the RRC reconfiguration message includes one of: a relay link change indication if the UE accesses the network node over both a direct path between the UE and the network node and a first indirect path between the UE and the network node associated with a source relay UE; and a path switching indication to a candidate relay UE if the UE accesses the network node over the direct path, the first indirect path, or both the direct path and the first indirect path; and perform relay link change or path switching based on the RRC reconfiguration message. According to another embodiment of the present application, a source network node includes a transceiver; and a processor coupled to the transceiver; and the processor is configured to: transmit a handover request for a path switching operation to one or more candidate network nodes, wherein the handover request includes ID information of a requested target UE served by a target network node; receive a response message from the one or more candidate network nodes, wherein the response message includes ID information of at least one candidate relay UE; and transmit an RRC reconfiguration message associated with the at least one candidate relay UE to a remote UE.
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