U2U Relay Configuration Feedback for Second-Hop Status
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Solution Overview
Problem
Existing communication technologies face challenges in configuring end-to-end (E2E) and per-hop PC5-S messages in UE-to-UE relay communications, with the transmitting UE being unaware of whether per-hop configurations are successful.
Innovation Solution
A method where a relay UE receives first configuration information and provides configuration feedback to the transmitting UE, enabling the UE to be aware of successful second hop configuration, thereby improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If relay UE is used to extend network coverage and enable direct D2D communication, then coverage area and communication capability are improved, but the transmitting UE becomes unaware of per-hop configuration success status
Solution Approach 1:
The patent implements a feedback mechanism where the relay UE sends configuration feedback information to the transmitting UE. This feedback includes whether the second hop configuration (relay UE to destination UE) was successful, allowing the transmitting UE to track configuration status across multiple hops without direct knowledge from the destination UE.
Solution Approach 2:
The relay UE acts as an intermediary between the transmitting UE and destination UE. It receives first configuration information from the transmitting UE, performs second configuration to the destination UE, and reports back the configuration status. This intermediary role solves the information asymmetry problem in multi-hop relay communications.
2Area of stationary object
If multi-hop relay communication is implemented, then network coverage is extended, but configuration complexity and information tracking difficulty increase
Solution Approach 1:
The patent segments the configuration process into distinct stages: first configuration (transmitting UE to relay UE) and second configuration (relay UE to destination UE). Each stage has its own configuration information and feedback mechanism, making the overall complex multi-hop configuration manageable through modular segmentation.
Solution Approach 2:
The feedback mechanism provides structured information about configuration status at each hop. The relay UE reports whether the second hop configuration succeeded or failed, giving the transmitting UE clear visibility into the configuration state without requiring complex tracking of all intermediate steps.
Data Source
AI summary
Example embodiments of the present disclosure relate to methods, devices, and computer storage medium for U2U relay. A second terminal device receives, from a first terminal device, first configuration information indicating at least one of: a first reconfiguration for a first channel between the second terminal device and a third terminal device, or at least one quality of service (QoS) parameter for the first channel; transmits, to the third terminal device, second configuration information determined based on the first configuration information; and transmits, to the first terminal device, configuration feedback information at least indicating whether the first reconfiguration is failed. In this way, the first terminal device may be aware of the reconfiguration state for the first channel, some further operations may be performed by the first terminal device and the communication efficiency can be improved.