Sidelink Radio Bearer Configuration for Unicast Links
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing unicast transmission configurations for sidelink communication in next-generation networks, particularly in configuring and maintaining radio bearers for reliable data exchange between user equipment (UEs) in 5G and beyond systems.
Innovation Solution
A method and apparatus are introduced where a first UE receives a message for sidelink radio bearer (SLRB) configuration from a second UE and subsequently requests a second SLRB configuration from a network node upon successful transmission confirmation, enabling dynamic configuration and management of unicast links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a UE receives SLRB configuration from another UE directly, then configuration speed is improved, but configuration reliability deteriorates due to lack of network node validation
Solution Approach 1:
The patent introduces a network node (gNB) as an intermediary to validate and confirm SLRB configurations. When a UE receives SLRB configuration from another UE, it forwards the configuration to the network node for validation. The network node acts as a mediator that ensures configuration reliability while maintaining the direct UE-to-UE configuration speed advantage.
2Loss of energy
If SLRB configuration is requested only when needed, then signaling overhead is reduced, but configuration delay increases
Solution Approach 1:
The patent implements preliminary action by having UEs proactively request SLRB configuration from the network node upon receiving configuration from another UE, rather than waiting for network initiation. This preliminary request mechanism reduces configuration delay while maintaining signaling efficiency by triggering requests only when actual configuration needs arise.
3Device complexity
If direct UE-to-UE SLRB configuration is implemented, then network complexity is reduced, but configuration adaptability deteriorates
Solution Approach 1:
The patent implements feedback mechanisms where UEs report received SLRB configurations to the network node, which then validates and confirms the configurations. This feedback loop enables the network to maintain adaptability and control over configurations while allowing direct UE-to-UE configuration initiation, thus reducing network complexity while preserving adaptability.
Data Source
AI summary
A method and apparatus are disclosed from the perspective of a first UE (User Equipment) to request SLRB (Sidelink Radio Bearer) configuration for a unicast link with a second UE. In one embodiment, the method includes the first UE receiving a first message from the second UE, wherein the first message includes a first SLRB configuration for the unicast link. The method further includes the first UE transmitting a second message to a network node to request a second SLRB configuration for the unicast link when the first message is received or a successful transmission of a complete message associated with the first message to the second UE is confirmed.