PDCP-RLC Segmentation Scheme for Lower-Latency 5G Data Transfer
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Solution Overview
Problem
Current wireless communication systems, particularly 4G and 5G, face challenges in efficiently processing high-speed data due to redundant and inefficient protocol layer functionalities, leading to increased latency and processing overhead, which are unsuitable for highly interactive applications like HD video streaming and augmented reality.
Innovation Solution
Optimizing network protocol layers by enhancing the PDCP and RLC protocols with efficient segmentation and reassembly mechanisms, reducing redundancy, and implementing a simplified protocol stack to meet high throughput and low latency requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional protocol layers (PDCP, RLC) are used in 4G/5G networks, then basic data transmission functionality is maintained, but processing overhead increases and latency increases
Solution Approach 1:
The patent extracts and eliminates redundant protocol functionalities from the conventional PDCP and RLC layers. Specifically, it removes unnecessary segmentation and reassembly operations at the RLC layer, and eliminates redundant error correction mechanisms, thereby simplifying the protocol stack while maintaining core data transmission reliability
Solution Approach 2:
The patent implements a simplified protocol layer that performs multiple functions through a unified mechanism. The optimized PDCP layer handles both data transmission and error correction through a single consolidated process, eliminating the need for separate dedicated functions at lower layers, thus reducing overall system complexity
2Productivity
If conventional protocol layers process high-speed data, then data transmission is enabled, but processing overhead increases
Solution Approach 1:
The patent removes unnecessary processing steps from the conventional protocol stack, specifically extracting segmentation and reassembly operations from the RLC layer and consolidating error correction functions. This elimination of redundant processing steps directly reduces processing overhead while maintaining high-speed data transmission capability
Solution Approach 2:
The patent applies segmentation at the optimized PDCP layer to divide data into manageable units that can be processed more efficiently. By segmenting data at this higher layer rather than at the RLC layer, the system achieves better processing performance with reduced overhead for high-speed applications
3Reliability
If conventional protocol layers are used, then basic communication is maintained, but latency increases
Solution Approach 1:
The patent extracts and eliminates time-consuming protocol operations from the conventional stack, specifically removing redundant segmentation and reassembly processes at the RLC layer. This elimination directly reduces the time required for data processing and transmission, thereby reducing latency while maintaining communication reliability through the optimized PDCP layer
Data Source
AI summary
A method and a system for optimizing the network protocol layer functionality of a network are provided. The method includes generating a packet data convergence protocol (PDCP) protocol data unit (PDU) based on a plurality of PDCP service data units (SDUs), by adding a first identifier associated with an identification of the PDCP PDU, generating a radio link control (RLC) PDU by adding an RLC header to the PDCP PDU, wherein the at least one segmentation of the RLC PDU is determined based on a grant related to the RLC PDU, and adding, based on the determination of the at least one segmentation of the RLC PDU, one from among the first identifier and a second identifier to each of the at least one segmentation of the RLC PDU.