RLC Segmentation Overhead Reduction in 5G Wireless Systems
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Solution Overview
Problem
The existing 5G communication systems face inefficiencies in data transmission due to the overhead caused by the segment offset (SO) field in the radio link control (RLC) layer, leading to wasted radio resources and increased complexity during data segmentation in next-generation mobile communication systems.
Innovation Solution
A method is introduced to optimize the SO field by mapping packet-duplicated data into different logical channel groups, allowing transmission from different time resources or medium access control (MAC) PDUs, and using a new buffer status report to improve reliability and reduce unnecessary packet duplication, thereby minimizing overhead and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the RLC layer performs segmentation operation with SO field for each segment, then data transmission can be achieved, but overhead increases and radio resources are wasted
Solution Approach 1:
The patent extracts the SO field from the RLC header structure by implementing RLC segmentation without including the SO field in each segment header. This removes the harmful overhead component while preserving the essential segmentation functionality, directly resolving the contradiction between data transmission capability and overhead reduction.
Solution Approach 2:
The patent changes the parameter configuration of the RLC header by setting the SO field to zero or removing it from the header structure. This parameter modification enables segmentation operation to proceed with reduced overhead, transforming the system from including SO field to excluding it, thereby resolving the overhead issue while maintaining transmission functionality.
2Reliability
If packet duplication is performed for reliability improvement, then transmission reliability increases, but resource utilization decreases and complexity increases
Solution Approach 1:
The patent introduces a buffer status report mechanism that provides feedback to the transmitting side about the reception status of duplicated packets. This feedback enables intelligent control of packet duplication, allowing the system to adjust duplication behavior based on actual channel conditions and reception status, thereby improving reliability while avoiding unnecessary duplication complexity.
Solution Approach 2:
The patent implements dynamic packet duplication where the duplication behavior adapts based on buffer status and channel conditions. The system dynamically adjusts whether to duplicate packets and which logical channel groups to use, transforming the static duplication mechanism into a dynamic one that reduces complexity by avoiding unnecessary duplication while maintaining reliability when needed.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. An embodiment of the present disclosure relates to a method and an apparatus for transmitting data in a next-generation mobile communication system.