Sidelink Relay Path Switch Configuration via RRC Reconfiguration
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Solution Overview
Problem
Existing technologies for sidelink relay in new radio (NR) communication lack complete implementation for direct to indirect and indirect to indirect path switches, leading to incomplete service continuity mechanisms.
Innovation Solution
The method involves receiving a radio resource control (RRC) reconfiguration message at a first device, determining if it contains information for a path switch to a third device, and configuring the first device for the path switch based on the type of switch. This includes transmitting RRC reconfiguration messages and handling RRC reconfiguration complete messages to facilitate the path switch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If path switch mechanisms are implemented in sidelink relay, then service continuity is improved, but device complexity increases
Solution Approach 1:
The path switch mechanism is segmented into distinct types (direct to indirect, indirect to indirect) with specific procedures for each. The RRC reconfiguration process is divided into message transmission, processing, and completion stages, allowing complex functionality to be managed through modular, organized steps that reduce implementation complexity while maintaining service continuity
Solution Approach 2:
The RRC reconfiguration message acts as an intermediary carrier that transports path switch information between devices. This standardized message structure mediates the complex path switch operation, allowing devices to exchange necessary configuration data without requiring complex direct coordination protocols, thereby improving reliability while managing complexity
2Reliability
If RRC reconfiguration messages are transmitted for path switching, then communication reliability is improved, but message transmission overhead increases
Solution Approach 1:
The RRC reconfiguration message is designed as a universal communication mechanism that serves multiple functions: it carries path switch information, conveys device configuration data, and establishes communication parameters. This multi-functionality reduces the need for separate dedicated messages for each function, thereby improving communication reliability while minimizing message transmission overhead
Solution Approach 2:
The RRC reconfiguration message is transmitted in advance to prepare devices for path switching before the actual switch occurs. This preliminary action allows devices to process and configure themselves ahead of time, ensuring reliable path switching while reducing the need for subsequent corrective messages, thus optimizing the quantity of communication overhead
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer readable media for communication. A first device receives, from a second device serving the first device, a RRC reconfiguration message and determines whether the RRC reconfiguration message comprises information on a path switch to a third device. The first device is to be communicated with a fourth device serving the third device via the third device and the first device is to be communicated with the third device via a sidelink interface. If the RRC reconfiguration message comprises the information, the first device determines a configuration of the first device for the path switch based on a type of the path switch. In this way, a procedure for a path switch to relay UE may be provided.