Collocated Transceiver Interference Mitigation via Dynamic Power Control
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Solution Overview
Problem
In-device coexistence interference occurs between collocated transceivers, such as LTE and Wi-Fi, due to their close spectrum allocation and physical proximity, leading to significant degradation in LTE Block Error Rate (BLER) and throughput loss.
Innovation Solution
A low complexity interference mitigation method that pre-sets and dynamically adjusts the power of the second transceiver based on throughput performance requirements and interference estimation, using techniques like two-step dynamic power control and power translation tables, to maintain desired LTE DL performance without external assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radio transceivers are physically collocated in the same UE, then network access versatility is improved, but interference between transceivers occurs leading to degraded LTE performance
Solution Approach 1:
The patent dynamically changes the transmit power parameter of the second transceiver based on detected interference conditions. When interference affecting LTE performance is detected, the system adjusts the power parameter of the second transceiver to mitigate the harmful effects while maintaining multi-radio functionality.
2Power
If transmit power of one transmitter is increased, then transmission capability is improved, but interference to nearby receiver increases due to close physical proximity
Solution Approach 1:
The system implements a feedback mechanism where the receiver monitors for interference from the transmitter. When interference is detected above a threshold level, this information feeds back to control the transmitter's power, causing it to reduce or adjust its transmit power to eliminate the harmful interference while preserving necessary communication functionality.
Solution Approach 2:
The transmitter dynamically adjusts its power parameter based on feedback about interference conditions. When harmful interference is detected, the power parameter is changed to a lower level to mitigate the interference effect on the nearby receiver.
3Reliability
If dynamic power adjustment is implemented, then interference mitigation is improved, but system complexity increases
Solution Approach 1:
The system performs self-service by having the receiver autonomously detect interference conditions and control the transmitter's power adjustments without requiring external intervention or complex centralized control. This self-service approach mitigates interference while keeping system complexity manageable.
Data Source
AI summary
The disclosure relates to a method for mitigating interference of a first radio signal received by a first transceiver of a first radio access technology (RAT) due to transmission of a second radio signal by a second transceiver of a second RAT, wherein the first transceiver and the second transceiver are physically collocated on a same device. The method includes: pre-setting a power of the second radio signal based on a throughput performance requirement for the first radio signal before transmission of the second radio signal, and tuning the power of the second radio signal during transmission of the second radio signal based on estimating the interference of the first radio signal.