Relay Frame Configuration Latency Optimization
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Solution Overview
Problem
Relay enabled communication networks experience increased latency when wireless devices communicate through relay nodes compared to direct communication with access nodes, affecting the efficiency of data transmission.
Innovation Solution
A method and system for determining macro and relay coverage latencies by transmitting sounding reference signals and selecting a frame configuration that optimizes communication through relay nodes by adjusting the number of uplink and downlink subframes based on latency differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a relay node is used to extend coverage area, then the coverage area is improved, but the communication latency increases
Solution Approach 1:
The patent applies dynamics by making the frame configuration adjustable and adaptive rather than fixed. The system dynamically selects between different frame configurations (first and second configurations) based on real-time latency measurements. When relay communication latency is measured to be higher than macro coverage latency, the system switches to a frame configuration optimized for lower latency, thereby dynamically adapting to resolve the contradiction between extended coverage and increased latency.
2Area of stationary object
If relay communication is used to provide coverage in uncovered areas, then coverage is improved, but data transmission efficiency decreases
Solution Approach 1:
The system dynamically adapts frame configuration based on measured latency conditions. When relay communication is used, the system measures the latency and selectively applies different frame configurations - using a first configuration when latency is acceptable and switching to a second configuration when latency exceeds macro coverage latency, thereby optimizing data transmission efficiency dynamically rather than statically.
Solution Approach 2:
The patent changes the frame configuration parameters (specifically the ratio of uplink to downlink subframes) based on measured latency conditions. By adjusting these parameters - using a frame configuration with more downlink subframes when relay latency is high - the system optimizes data transmission efficiency for relay communication scenarios, directly addressing the productivity deterioration caused by relay usage.
3Loss of time
If frame configuration is optimized for relay communication, then relay coverage latency is reduced, but the configuration must be selectively changed based on conditions
Solution Approach 1:
The system implements feedback by measuring the actual relay communication latency and using this measurement to determine which frame configuration to apply. The latency measurement serves as feedback that triggers appropriate frame configuration selection - when measured latency exceeds macro coverage latency, the system switches to a frame configuration designed to reduce relay coverage latency, creating a closed-loop control system.
Solution Approach 2:
The system performs self-service by autonomously measuring its own communication latency and automatically selecting the appropriate frame configuration without external intervention. The network node or wireless device self-evaluates the relay communication performance and self-adjusts the frame configuration accordingly, reducing the need for complex external management while optimizing latency performance.
Data Source
AI summary
A frame configuration is assigned in a relay enabled communication network. A macro coverage latency is determined. The macro coverage latency is a latency of a communication between the wireless device and a network node when the wireless device is not communicating through the relay node. A relay coverage latency is determined. The relay coverage latency is a latency of a communication between the wireless device and the network node when the wireless device is communicating through the relay node. Based on a comparison of the macro coverage latency and the relay coverage latency, a frame configuration is selected for a communication through the relay node.