Terminal Discarding Segmented RRC Messages for 5G Reconfiguration
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Solution Overview
Problem
Current 5G communication systems face challenges in efficiently managing application layer measurement reporting, particularly during synchronous reconfiguration, which affects the scalability and performance of the network.
Innovation Solution
The method involves transmitting terminal capability information to the base station, receiving and processing segmented RRC messages, and discarding stored segments upon conditional reconfiguration execution, ensuring seamless application layer measurement reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If segmented RRC messages are stored in the terminal during synchronous reconfiguration, then message delivery reliability is improved, but terminal memory usage and processing complexity increase
Solution Approach 1:
The patent implements a mechanism where segmented RRC messages are discarded from terminal storage after successful reconfiguration execution. When the terminal applies the third RRC reconfiguration message from the segmented sequence, it automatically discards the stored segments from both RRC and PDCP layers. This ensures reliable message delivery through temporary storage while preventing permanent memory accumulation and reducing processing complexity after the reconfiguration is complete.
2Reliability
If all segmented RRC message segments are retained in terminal storage, then message integrity is improved, but storage memory consumption increases
Solution Approach 1:
The patent establishes a dual-layer discarding mechanism that operates at both the RRC layer and PDCP layer. When conditional reconfiguration execution occurs or PDCP reestablishment is triggered, the terminal discards the segmented RRC messages from storage. This ensures message integrity during the reconfiguration process while limiting storage memory consumption by automatically removing segments after they have been successfully applied or when reestablishment is required.
Solution Approach 2:
The patent implements preliminary discarding actions at two different stages: (1) When the third RRC reconfiguration message is applied due to conditional reconfiguration execution, segments are discarded from RRC storage; (2) When PDCP reestablishment is set in the second information for SRB4, segments are discarded from PDCP storage. These preliminary actions prevent memory accumulation before it becomes a problem, ensuring integrity only when needed while controlling storage consumption.
3Reliability
If segmented RRC messages are processed through multiple reconfiguration stages, then reconfiguration reliability is improved, but reconfiguration time and latency increase
Solution Approach 1:
The patent implements a multi-stage reconfiguration process with preliminary actions at each stage. The terminal receives and processes segmented RRC messages in sequence (first, second, and third reconfiguration messages), with each stage preparing specific configurations. The third RRC reconfiguration message contains conditional reconfiguration execution parameters that trigger final application. This staged approach ensures reliability through progressive configuration validation while managing reconfiguration time by preparing configurations in advance and executing them systematically rather than all at once.
Data Source
AI summary
A method and apparatus for application layer measurement reporting upon synchronous reconfiguration is provided. The method includes transmitting to the base station a terminal capability information message about the application layer measurement and conditional handover and the reception of segmented downlink RRC message, receiving from the base station a first RRC reconfiguration message containing other configuration and first information for SRB4, receiving a second RRC reconfiguration message containing a third RRC reconfiguration message from said base station, discarding the segments of the segmented RRC messages stored in the RRC when said third RRC reconfiguration message is applied due to the conditional reconfiguration execution, and discarding the segmented RRC messages stored in the PDCP when PDCP reestablishment is set in the second information for SRB4.