Full-Duplex Base Station Power Shaping on Overlapping Resources
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Solution Overview
Problem
Full-duplex wireless communications systems face challenges with self-interference due to concurrent transmission and reception, impacting reception quality and reliability.
Innovation Solution
Mitigation of self-interference through reduced transmission power on overlapping wireless resources, with the base station indicating power reduction to receiving devices, allowing successful decoding and combining of transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If full-duplex transmission is implemented to enable concurrent transmission and reception, then system throughput is improved, but self-interference increases and reception reliability deteriorates
Solution Approach 1:
The patent applies local quality by differentiating transmission power across different wireless resources. Specifically, the base station transmits at reduced power on first wireless resources where full-duplex operation occurs, while maintaining normal power on second wireless resources. This localized power adjustment mitigates self-interference in specific resource blocks while preserving overall system throughput, directly resolving the contradiction between productivity improvement and reliability deterioration.
2Reliability
If reduced transmission power is applied on overlapping resources to mitigate self-interference, then reception quality is improved, but transmission power is reduced
Solution Approach 1:
The patent implements parameter changes by dynamically adjusting transmission power levels based on duplexing mode and resource type. The base station modifies the power parameter for specific wireless resources where full-duplex operation is performed, reducing power only where necessary to mitigate self-interference. This selective parameter adjustment improves reception quality while minimizing the overall impact on transmission power, resolving the contradiction between reliability improvement and power reduction.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described in which a base station operating in full-duplex mode may provide for reception of one or more higher priority transmissions using at least partially overlapping time-frequency resources as used for transmission of lower priority communications. In order to mitigate self-interference at the base station, a transmission power used for the overlapping time-frequency resources may be reduced. The base station may provide an indication of a subset of resources that have a reduced transmission power, an amount of the power reduction for the subset of resources, or both.