Wireless Node RLC Configuration for Latency Optimization
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Solution Overview
Problem
In wireless communication systems, the limited resources available to base stations for communication with user equipment (UEs) lead to challenges in efficiently transmitting and receiving uplink/downlink data and control information, particularly in overcoming latency issues that are critical for system performance.
Innovation Solution
A method involving the configuration of radio bearers between radio link control entities of a node and a peer entity, using different RLC modes, and an adaptation layer that generates a backhaul adaptation protocol PDU by inserting a header between the RLC header and service data unit, facilitating efficient data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single RLC mode is used for all radio bearers, then the system is simpler to manage, but it cannot optimize transmission for different traffic types and latency requirements
Solution Approach 1:
The patent segments the RLC configuration by introducing different RLC modes (first RLC mode and second RLC mode) that can be independently configured for different radio bearers. This allows the system to divide traffic into different categories and apply appropriate RLC modes to each, achieving optimization for different traffic types while maintaining manageable complexity through structured configuration messages
Solution Approach 2:
The patent implements dynamic RLC mode selection by configuring radio bearers with specific RLC modes based on traffic requirements. The network can dynamically assign first RLC mode for latency-sensitive traffic and second RLC mode for other traffic, allowing the system to adapt to changing traffic conditions while the configuration messages provide the structured framework for management
2Productivity
If radio resources are allocated to support more UEs and data transmission, then the system capacity increases, but the latency for critical applications worsens due to resource contention
Solution Approach 1:
The patent applies local quality by providing different RLC mode configurations to different radio bearers based on their specific requirements. Critical applications receiving first RLC mode configuration experience optimized latency performance, while other applications use second RLC mode, allowing the system to maintain high capacity while providing low-latency service where needed
Solution Approach 2:
The patent changes the RLC mode parameter for specific radio bearers to optimize performance. By configuring first RLC mode for latency-critical traffic and second RLC mode for other traffic, the system can achieve both high overall capacity and low latency for critical applications through parameter differentiation
3Ease of operation
If the adaptation layer inserts headers for all packets, then packet routing and management are improved, but the processing overhead and latency increase
Solution Approach 1:
The patent applies partial action by configuring the adaptation layer to insert headers selectively based on RLC mode requirements. For first RLC mode radio bearers where detailed tracking is needed, full header insertion is performed. For second RLC mode bearers, simplified handling is used, reducing processing overhead while maintaining adequate packet management capabilities
Data Source
AI summary
The present invention relates to a method for processing signals by a node in a wireless communication system. In particular, the method includes receiving a radio bearer (RB) configuration message from a network; and configuring a radio bearer between a radio link control (RLC) entity of the node and a peer RLC entity using the RB configuration message, wherein the RB configuration message includes information about that the peer RLC entity operates with a different RLC mode from a RLC entity of the node.