Uplink Power Control for Full-Duplex Self-Interference
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Solution Overview
Problem
Full-duplex wireless communication is limited by self-interference, where the uplink communication interferes with the downlink communication, degrading performance and making it challenging to achieve optimal wireless communication characteristics.
Innovation Solution
Implementing uplink power control techniques that set transmission power for uplink communication based on parameters associated with downlink communication, such as modulation and coding schemes, frequency resource allocation, and time-domain overlap, to reduce self-interference and improve full-duplex communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If uplink transmission power is increased to improve uplink communication quality, then uplink data rate is improved, but self-interference with downlink communication increases
Solution Approach 1:
The patent dynamically adjusts uplink transmission power parameters based on downlink communication conditions. By changing the power parameter adaptively rather than using fixed power levels, the system achieves optimal uplink performance while minimizing self-interference impact on downlink communication.
Solution Approach 2:
The patent implements a feedback mechanism where the base station evaluates downlink communication quality and provides control information to adjust uplink power. This closed-loop feedback allows the system to respond to changing interference conditions and maintain optimal performance for both uplink and downlink.
2Productivity
If uplink and downlink communications are performed concurrently to improve spectrum efficiency, then spectrum efficiency is improved, but self-interference degrades communication reliability
Solution Approach 1:
The patent employs dynamic power control that adapts to real-time communication conditions. By making the uplink power parameter dynamic rather than static, the system can concurrently perform uplink and downlink communications while adjusting power levels to maintain reliability despite self-interference.
Solution Approach 2:
The system changes transmission power parameters based on evaluated communication quality. This parameter adaptation allows full-duplex operation to proceed with modified power settings that preserve reliability while enabling concurrent transmissions for improved spectrum efficiency.
3Reliability
If uplink power control based on downlink parameters is implemented to reduce self-interference, then downlink communication quality is improved, but system complexity increases
Solution Approach 1:
The patent performs preliminary evaluation of downlink communication quality parameters before adjusting uplink power. By assessing conditions in advance and preparing control decisions beforehand, the system reduces the complexity of real-time power control while maintaining downlink communication quality.
Data Source
AI summary
This disclosure provides systems, methods, and apparatuses, including computer programs encoded on computer storage media, for wireless communication. In one aspect, a user equipment (UE) is configured to set a transmission power for an uplink communication based, at least in part, on a downlink communication. The UE is further configured to perform the uplink communication based, at least in part, on the set transmission power while concurrently performing the downlink communication. For example, in some aspects, the transmission power for the uplink communication may be set based on the type of downlink communication or based on one or more parameters associated with the downlink communication. In additional aspects, an algorithm may be used to set the transmission power for the uplink communication.