Sidelink Relay QoS Mapping Across End-to-End Connections
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Solution Overview
Problem
Existing direct communication technologies fail to accurately map Quality of Service (QoS) flows with the same QoS profile to different sidelink interface bearers and logical channels under different end-to-end connections, leading to potential end-to-end transmission failures.
Innovation Solution
A method involving a first terminal sending a message to a network device that includes a destination Layer 2 (L2) identity of a relay terminal and an end-to-end identifier to distinguish different end-to-end connections, allowing the network device to accurately map QoS flows with the same QoS profile to different sidelink interface bearers and logical channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If only relay terminal L2 identifier and QoS profile are reported to the network device, then the signaling overhead is reduced, but QoS flows with the same QoS profile cannot be accurately mapped to different sidelink interface bearers under different end-to-end connections, leading to transmission failures
Solution Approach 1:
The patent segments the identification information by introducing an end-to-end identifier that is separate from the relay terminal L2 identifier. This segmentation allows the network device to distinguish between different end-to-end connections passing through the same relay terminal, enabling accurate mapping of QoS flows to appropriate bearers while keeping the signaling structure organized and manageable
Solution Approach 2:
The patent adds a new dimension to the identification space by introducing the end-to-end identifier as an additional layer of differentiation. This dimensional expansion allows the system to handle multiple end-to-end connections through the same relay terminal by providing an additional criterion for bearer mapping, thus resolving the ambiguity without significantly increasing overall system complexity
2Measurement precision
If end-to-end identifier is added to the message to distinguish different end-to-end connections, then QoS flow mapping accuracy is improved, but the message size and signaling overhead increase
Solution Approach 1:
The patent applies local quality by making the end-to-end identifier optional and context-dependent. The identifier is included in the message only when there are multiple end-to-end connections that need to be distinguished, rather than being a mandatory field in all messages. This selective application minimizes the increase in message size while providing the necessary precision when required
Data Source
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AI summary
The present disclosure relates to the technical field of communications. Provided are a sidelink interface message transmission method and apparatus. The method comprises: sending a first message to a network device, wherein the first message comprises a destination layer 2 (L2) identity of a relay terminal and an end-to-end identifier used for distinguishing different end-to-end connections between a first terminal and a second terminal; the relay terminal is a relay terminal between the first terminal and the second terminal; there is an end-to-end connection between the first terminal and the second terminal; and there are one or more second terminals.