Adaptive Frequency Separation for Wireless Signal Interference
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Solution Overview
Problem
Existing LTE User Equipment (UE) experiences performance degradation and reduced coverage due to self-interference issues when using narrower transmit-receive frequency separation than specified, which can lead to increased error rates and throughput reduction, especially in full-duplex FDD operations.
Innovation Solution
Adaptive transmit-receive frequency separation is dynamically configured based on parameters such as transmit power, number of physical channels, and band gap to ensure sufficient duplexer gap, allowing for efficient use of radio resources and maintaining performance requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If narrower transmit-receive frequency separation is used, then radio resource efficiency is improved, but self-interference increases causing performance degradation
Solution Approach 1:
The patent applies dynamics by making the transmit-receive frequency separation configurable and adaptive rather than fixed. The system dynamically adjusts the frequency separation based on operational conditions, allowing narrower separation when self-interference is manageable and maintaining adequate separation when performance degradation occurs. This is achieved through configurable parameters that enable the system to adapt the frequency plan to specific deployment scenarios and device capabilities.
Solution Approach 2:
The patent changes the parameter of frequency separation from a fixed standard value to a configurable range. By allowing the frequency separation to be adjusted as a variable parameter rather than a constant, the system can optimize radio resource efficiency by using narrower separations when beneficial while preventing performance degradation by maintaining adequate separation when needed. This parameter change enables flexible trade-offs between resource efficiency and performance.
2Productivity
If narrower transmit-receive frequency separation is used, then throughput is improved, but error rate increases
Solution Approach 1:
The patent applies dynamics by enabling adaptive adjustment of frequency separation based on channel conditions and operational requirements. The system can dynamically select appropriate frequency separation values to maintain low error rates while maximizing throughput, rather than being constrained to fixed separation values that may not be optimal for all scenarios.
Solution Approach 2:
The patent changes the frequency separation parameter from fixed to configurable, allowing the system to optimize the trade-off between throughput and error rate. By adjusting this parameter based on operational conditions, the system can achieve higher throughput when narrower separation is acceptable and maintain reliability when broader separation is required.
3Area of stationary object
If transmit power is increased to enhance coverage, then coverage capability is improved, but self-interference increases
Solution Approach 1:
The patent changes the frequency separation parameter to be configurable, which directly affects the self-interference level. By adjusting the frequency separation parameter, the system can accommodate higher transmit power levels without excessive self-interference, thereby enhancing coverage area. The configurable parameter allows optimization of the relationship between transmit power and frequency separation to maximize coverage while controlling interference.
Data Source
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AI summary
There is provided a method and apparatus for transmitting and receiving signals in a frequency band in a wireless communications network. The method comprises determining a frequency separation between a frequency of a transmit signal and a frequency of a receive signal within the frequency band based on at least one of a power of the transmit signal, a number of physical channels associated with the transmit signal, and a number of physical channels associated with the receive signal. The method further comprises transmitting and receiving signals in the frequency band in accordance with the determined frequency separation. The method may be performed by a User Equipment of a Network Node.