5G Signaling Radio Bearer Message Loss Detection and Recovery
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Solution Overview
Problem
The existing data processing methods in 5G communication systems face challenges with stable data transmission and high-speed processing, particularly due to issues with the backhaul interface between the PDCP and RLC layers, and the complexity of supporting multiple bearer combinations when connecting with multiple base stations.
Innovation Solution
The method involves a reception device that receives signaling radio bearer messages over a backhaul between base stations, determines message loss using a reordering timer, and requests transmission status from the PDCP layer to reconstruct lost messages, thereby ensuring stable data transmission and simplifying bearer configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transmission is performed over backhaul interface between base stations in dual connectivity, then data transmission capability is improved, but message loss occurs due to reordering timer expiration
Solution Approach 1:
The patent implements a feedback mechanism where the reception device monitors sequential message reception and detects losses by comparing expected sequence numbers with actually received ones. When message loss is detected, the reception device requests retransmission from the transmitting device, creating a closed-loop feedback system that ensures reliable delivery while maintaining high-speed transmission over the backhaul interface.
Solution Approach 2:
The patent employs preliminary actions by maintaining buffers at both transmitting and receiving ends to store messages temporarily. The reception device uses a reordering timer to anticipate message arrival and prepare for potential losses before they occur. This preliminary buffering and timing mechanism allows the system to handle message reordering and loss proactively rather than reactively.
2Adaptability or versatility
If multiple bearer combinations are supported for connections with multiple base stations, then network adaptability is improved, but configuration complexity increases
Solution Approach 1:
The patent implements a universal message structure that can carry different types of data (user data, control information, status reports) across multiple bearers and radio access technologies. The standardized PDCP layer protocol enables the same infrastructure to support various bearer combinations (SRB0-SRB3, DRB0-DRB5, split bearers) without requiring separate configuration mechanisms for each combination, thus reducing overall system complexity while maintaining high adaptability.
Solution Approach 2:
The patent segments the data transmission function into distinct layers (PDCP, RLC, MAC, PHY) with clearly defined responsibilities. The PDCP layer handles segmentation and reassembly of data units, while the RLC layer manages retransmission and ordering. This functional segmentation allows multiple bearer combinations to be supported through modular configuration rather than monolithic complex systems.
Data Source
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AI summary
The present disclosure relates to a 5G or pre-5G communication system for supporting a higher data transfer rate beyond a 4G communication system, such as LTE. An embodiment of the present invention may provide an operating method of a reception apparatus, the operating method comprising the steps of: receiving a signaling radio bearer (SRB) message; determining whether at least one SRB message has not been sequentially received; checking whether a reordering timer has expired, in case that the at least one SRB message has not been sequentially received; and determining a loss of the at least one SRB message in case that the reordering timer has expired.