Sidelink Information Retention During Radio Connection Modifications
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Solution Overview
Problem
Current wireless communication systems face challenges in managing sidelink user equipment (UE) information, particularly when a UE experiences radio connection failures or transitions between connected and inactive states, leading to inconsistencies in sidelink UE information handling.
Innovation Solution
The implementation of techniques in both UE and radio access network (RAN) to manage sidelink UE information by transmitting, retaining, or retransmitting this information based on changes in radio connections, ensuring proper configuration and resource allocation for sidelink communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink UE information is retained during radio connection modifications, then communication reliability is improved, but device complexity increases due to additional information management requirements
Solution Approach 1:
The patent applies preliminary action by having the UE proactively retain sidelink UE information before radio connection modifications occur. The UE stores this information in advance during connected state and retrieves it during state transitions, preventing information loss and ensuring seamless sidelink communication continuity across different radio states.
2Measurement precision
If sidelink UE information is retransmitted after radio connection failure, then information accuracy is improved, but loss of time increases due to additional transmission cycles
Solution Approach 1:
The patent applies copying by creating and maintaining a local copy of sidelink UE information in the UE's memory. Instead of relying on repeated retransmissions from the network, the UE stores a copy of the information locally and can immediately retrieve and use it during radio connection failures or state transitions, eliminating time delays associated with retransmission cycles.
3Adaptability or versatility
If sidelink configuration is maintained during state transitions, then adaptability is improved, but loss of information increases due to potential inconsistencies between UE and RAN
Solution Approach 1:
The patent applies feedback by establishing a mechanism where the UE provides feedback to the RAN about its sidelink UE information during state transitions. The RAN uses this feedback to verify and update the sidelink configuration, ensuring both the UE and RAN maintain consistent information. This feedback loop prevents information inconsistency while allowing the system to adapt to different radio states.
Data Source
AI summary
A user equipment (UE), for managing information related to sidelink communications, when the UE has a radio connection with a radio access network (RAN), (i) transmits (1802), to the RAN, sidelink information for generating, at the RAN, a sidelink configuration for the UE, (ii) determines (1804), subsequently to the transmitting, that the radio connection with the RAN is to be modified, and (iii) processes (1806) the sidelink information in response to the determination. A RAN, for managing information related to sidelink communications, when a UE has a radio connection with the RAN, (i) receives (1902), from the UE, sidelink information, (ii) generates (1904), using the sidelink information, a sidelink configuration for the UE, (iii) determines (1906) that the radio connection with the UE is to be modified, and processes (1908) the sidelink information in response to the determination.