Sidelink Relay Adaptation Layer PDU Mapping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile communication systems face challenges in efficiently managing sidelink relay connections and protocol data units (PDUs) between sidelink and Uu links, which affects the performance and reliability of data transmission between terminals and base stations.
Innovation Solution
The proposed method involves generating and configuring PC5-relay adaptation layer (PC5-RAL) and Uu-relay adaptation layer (Uu-RAL) protocol data units (PDUs) with remote terminal identifiers and connection identifiers, mapping these to respective radio link control (RLC) channels, and transmitting them between terminals and base stations to establish and manage relay connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If relay connections are established between sidelink and Uu links, then data transmission between terminals and base stations is enabled, but system complexity increases due to multiple protocol layers and identifier mappings
Solution Approach 1:
The patent segments the relay adaptation layer into distinct functional components: PC5-RAL for sidelink interface and Uu-RAL for Uu interface. Each segment handles specific identifier mappings appropriate to its interface type, reducing the complexity burden on any single component while enabling comprehensive relay functionality across both interfaces.
Solution Approach 2:
The relay terminal acts as an intermediary node between the remote terminal and base station. It introduces adaptation layers that mediate between different protocol requirements of PC5 and Uu interfaces, performing identifier mappings and PDU transformations to bridge the two interfaces while managing complexity at the relay node.
2Reliability
If PC5-RAL and Uu-RAL PDUs are generated with remote terminal identifiers and connection identifiers, then relay connection management is improved, but processing overhead increases
Solution Approach 1:
The patent performs preliminary actions by pre-configuring identifier mappings and establishing mapping relationships between remote terminal identifiers, connection identifiers, and local identifiers before actual data transmission. This preparation reduces processing time during active communication while maintaining reliable connection management through pre-established mapping tables.
3Measurement precision
If multiple identifier mappings are performed for relay communication, then connection accuracy is improved, but processing complexity increases
Solution Approach 1:
The patent applies local quality by implementing different mapping strategies tailored to specific interface requirements. PC5-RAL uses mappings appropriate for device-to-device communication while Uu-RAL uses mappings suited for terminal-to-base-station communication. Each local component optimizes its mapping approach for its specific context, improving accuracy without requiring all components to handle all mapping types.
Data Source
AI summary
An operation method of a first terminal for establishing a relay connection may comprise: generating a PC5-RAL PDU header for the first terminal, the PC5-RAL PDU header including or not including a remote terminal identifier and a connection identifier; mapping the generated PC5-RAL PDU header to a PC5-radio link control (RLC) channel; and generating a PC5-RAL PDU by adding data to the PC5-RAL PDU header, and transmitting the generated PC5-RAL PDU to a corresponding second terminal through the PC5-RLC channel, wherein the first terminal is a remote terminal or a relay terminal, and the second terminal is a relay terminal or a remote terminal.