Indirect-Path Radio Link Failure Detection for Relay User Equipment
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Solution Overview
Problem
Existing technologies lack a clear method for managing radio links of indirect paths in multi-path transmission scenarios involving user equipment (UE) with relay functions.
Innovation Solution
A method and device for radio link management in user equipment that enables the detection and management of radio link failures in indirect paths by determining the occurrence of such failures in various links, including Uu links and sidelinks between relay user equipment and the network or remote user equipment, and facilitates communication of this information to the network device for reselection or discovery of target objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-path transmission mechanism is introduced to improve peak rate and throughput, then data transmission performance is improved, but radio link management complexity increases
Solution Approach 1:
The patent segments the indirect path into multiple independent links (Uu link between relay UE and network device, sidelinks between remote UE and relay UEs). Each link can be independently managed for radio link failure detection, allowing the system to maintain multi-path transmission benefits while simplifying management through modular link-level control
Solution Approach 2:
The patent introduces relay user equipment as intermediaries between the remote user equipment and the network device. These relay UEs act as mediators that manage the indirect paths and can independently detect and report radio link failures, reducing the management burden on the remote UE and enabling simplified failure detection mechanisms
2Reliability
If indirect path radio link failure detection is implemented, then service continuity is improved, but detection and measurement complexity increases
Solution Approach 1:
The patent enables relay user equipment to autonomously detect radio link failures in their own links and independently generate failure indication information. This self-service approach allows relay UEs to monitor their own link status without requiring complex centralized management, simplifying the detection process while ensuring reliable service continuity
Solution Approach 2:
The patent establishes a feedback mechanism where relay UEs transmit failure indication information to network devices through available paths. This feedback loop enables the network to be informed of radio link failures and initiate appropriate actions, improving service continuity while maintaining simple detection through direct relay UE reporting
Data Source
AI summary
A method and a device for radio link management, and a user equipment are provided. The method includes: in a case that a radio link failure occurs in a first link on a first indirect path of the user equipment, determining that a radio link failure occurs to the user equipment in the first indirect path; where the first link includes at least one of following: a Uu link between a first relay user equipment and a network device; a sidelink between a remote user equipment and the first relay user equipment; a sidelink between the remote user equipment and a second relay user equipment; a sidelink between two second relay user equipments; or, a sidelink between the second relay user equipment and the first relay user equipment.