Relay UE Capability Signaling for Multi-Path RRC Reconfiguration
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Solution Overview
Problem
Existing communication technologies face challenges in providing appropriate configuration information when terminals add or change indirect paths, especially when different versions of Relay UE coexist, requiring efficient RRC reconfiguration to ensure seamless network connectivity.
Innovation Solution
Terminals report first information to the network device, including multi-path capability, protocol release version, and configuration needs, allowing the network to determine and provide appropriate SL-SRB and PDCP configurations for optimal indirect path management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multi-path transmission is introduced to expand network coverage and improve connectivity, then network reliability is improved, but device complexity increases due to the need to manage multiple path types and relay terminals
Solution Approach 1:
The patent segments the indirect path management by introducing specific indication information fields that separately identify relay terminal versions and multi-path capabilities. This segmentation allows the network device to handle different relay terminal types (R17 and R18 versions) independently through targeted configuration messages, reducing the complexity of managing heterogeneous relay terminals while maintaining multi-path transmission reliability
Solution Approach 2:
The patent applies preliminary action by having the terminal pre-report its multi-path capability and relay terminal version information to the network device before actual path switching occurs. The network device uses this advance information to prepare appropriate configuration messages (RRC reconfiguration) that include the necessary indication information, enabling seamless path switching without increasing operational complexity during actual transmission
2Reliability
If RRC reconfiguration messages are sent to trigger relay terminals to enter CONNECTED state for indirect path switching, then network control and reliability are improved, but information transmission time increases due to the additional configuration steps required
Solution Approach 1:
The patent applies preliminary action by having the terminal report its multi-path capability and supported relay terminal versions to the network device in advance. This allows the network device to prepare appropriate RRC reconfiguration messages with the correct indication information before path switching is needed, reducing the time required for actual path switching while maintaining configuration reliability
Solution Approach 2:
The patent implements feedback by having the terminal report its capabilities and the network device respond with appropriately configured RRC reconfiguration messages that include indication information about relay terminal versions and multi-path capabilities. This feedback loop ensures that the network device has accurate information for efficient configuration while maintaining reliable control over the indirect path establishment
Data Source
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AI summary
The present disclosure provides an information transmission method, device, terminal and network device, relating to the field of communication technologies. The method includes: a terminal sending first information to a network device, where the first information includes at least one of the following information: indication information of a multi-path capability of the terminal; protocol release version information supported by a first relay terminal; indication information of a multi-path capability of the first relay terminal; indication information that the terminal needs split signaling radio bearer configuration; indication information that the terminal needs packet data convergence protocol (PDCP) duplicate transmission configuration corresponding to signaling radio bearer, where the multi-path capability includes supporting multi-path transmission or not supporting multi-path transmission.