Downlink RRC Message Segmentation During UE Reestablishment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in NR systems, the challenge arises when UE capability information or downlink RRC messages exceed the maximum PDCP SDU size, necessitating effective methods for segmentation and handling of these messages, especially during RRC reestablishment events.
Innovation Solution
A method for a UE to receive and process downlink RRC messages involves supporting segmentation and determining whether to discard or keep the received segments based on predetermined criteria during RRC reestablishment events, while a base station generates and transmits segmented RRC messages when the size exceeds a predetermined threshold.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If downlink RRC messages are segmented when exceeding maximum PDCP SDU size, then message delivery becomes possible, but UE buffer management complexity increases during RRC reestablishment
Solution Approach 1:
The downlink RRC message is divided into multiple segments when its size exceeds the maximum PDCP SDU size. Each segment is transmitted separately and the UE buffers them in sequence. This segmentation enables reliable delivery of large RRC messages while managing UE buffer resources efficiently through sequential reception and automatic reestablishment triggering when segments are missing.
2Loss of information
If segmented RRC messages are buffered in UE, then complete message reconstruction is possible, but unnecessary storage consumes buffer resources
Solution Approach 1:
The UE monitors the reception status of segmented RRC messages and provides feedback by triggering RRC reestablishment when segments are missing or incomplete. This feedback mechanism ensures message completeness while optimizing buffer usage, as the network can retransmit missing segments based on the reestablishment trigger rather than the UE continuously holding all segments in buffer.
3Reliability
If RRC reestablishment is triggered during segmented message reception, then connection recovery is possible, but message reception may be interrupted
Solution Approach 1:
The UE is configured with a reception completion threshold before triggering RRC reestablishment during segmented message reception. This preliminary configuration allows the UE to wait for a predetermined number of segments or a complete message set before initiating reestablishment, thereby reducing unnecessary interruptions and optimizing the balance between connection recovery and message reception continuity.
Data Source
AI summary
The present disclosure relates to: a communication technology merging IoT technology with a 5th generation (5G) or pre-5G communication system for supporting a data transmission rate higher than that of a 4th generation (4G) communication system such as long term evolution (LTE); and a system thereof. The present disclosure can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail, security- and safety-related services, and the like) on the basis of 5G communication technology and IoT-related technology. According to various embodiments of the present disclosure, a method and a device for processing a downlink RRC segment message in a next-generation mobile communication system can be provided.