Adaptive UE Cooperation Mode Selection for Wireless Networks
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Solution Overview
Problem
Existing UE cooperation protocols in wireless networks, such as Decode-and-Forward (D&F) and Amplify-and-Forward (A&F), are not adaptable to varying scenarios and do not effectively select the best cooperation mode based on current access link qualities, leading to suboptimal performance.
Innovation Solution
A method for adaptive UE cooperation mode selection in wireless networks that determines the optimal mode (D&F or soft UE combining) based on the interference-plus-noise ratio (SINR) of signals between a base station and cooperating UEs, allowing for dynamic switching between modes to optimize performance across different scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Decode-and-Forward (D&F) mode is used for UE cooperation, then the cooperation performance is improved when CUEs have high access link quality, but the scheme cannot be implemented when CUEs cannot decode the received signal
Solution Approach 1:
The patent implements dynamic mode selection between D&F and A&F based on real-time access link quality (SINR) measurements. The network component determines the appropriate cooperation mode for each CUE-TUE pair by evaluating the SINR threshold, enabling the system to adapt to varying channel conditions and maintain reliability across different scenarios
Solution Approach 2:
The patent changes the operational parameters of the cooperation mode based on the access link quality metric (SINR). When SINR exceeds a predefined threshold, D&F mode is selected; otherwise, A&F mode is chosen. This parameter-based selection resolves the contradiction by matching the cooperation mode to the current channel conditions
2Ease of operation
If a fixed UE cooperation protocol is used, then the implementation is simple, but the performance is suboptimal for varying access link qualities
Solution Approach 1:
The patent introduces dynamic mode selection that switches between D&F and A&F protocols based on real-time SINR measurements. This dynamic approach maintains implementation simplicity through automated threshold-based decision-making while significantly improving throughput by selecting the optimal mode for current channel conditions
3Reliability
If D&F mode is selected for all CUEs, then the decoding reliability is improved for high SINR scenarios, but the power consumption and resource usage increase unnecessarily for low SINR scenarios
Solution Approach 1:
The patent changes the cooperation mode parameter based on SINR threshold evaluation. For CUEs with SINR below the threshold, A&F mode is selected which avoids the power-intensive decoding operation. For CUEs with SINR above the threshold, D&F mode is selected to maximize decoding reliability. This parameter-based adaptation optimizes the trade-off between reliability and power consumption
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AI summary
Embodiments are provided for adaptive user equipment (UE) cooperation mode selection in wireless networks. An adaptive UE cooperation strategy is implemented, which adaptively switches between a Decode-and-Forward (D&F) mode and a soft UE combining mode that involves combining, at the TUE, signals from multiple cooperating UEs (CUEs). A method by a network component includes obtaining access link qualities for links between a base station and a plurality of CUEs for a target UE (TUE). A UE cooperation mode or a hybrid UE cooperation mode is then selected from a plurality of supported UE cooperation modes according to the access link qualities of the CUEs. At least one of the CUEs is then instructed to cooperate in forwarding the signals to the TUE using the selected UE cooperation mode. The CUEs can dynamically opt out of the UE cooperation according to the channel quality of the CUEs or TUE.