Central Control Entity for Multi-Radio Coexistence Interference
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Solution Overview
Problem
Coexistence interference between multiple radio transceivers in wireless devices, such as LTE, WiFi, and GNSS, operating in overlapping or adjacent frequency spectrums leads to significant degradation in communication due to physical proximity and radio power leakage, with existing solutions like filtering being insufficient to mitigate interference effectively.
Innovation Solution
A central control entity coordinates multiple radio transceivers to implement Frequency Division Multiplexing (FDM), Time Division Multiplexing (TDM), and power control solutions, adjusting frequency channels, transmission schedules, and power levels to minimize interference, by receiving and analyzing signal and traffic information to trigger handovers, channel switches, and power adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radio transceivers operate simultaneously in overlapping frequency spectrums, then network coverage and service capability are improved, but coexistence interference between transceivers increases
Solution Approach 1:
The patent segments the frequency spectrum into different time slots for different radio transceivers. The central control entity divides available frequency resources and allocates them to LTE, WiFi, and Bluetooth transceivers in a time-division manner, ensuring that only one transceiver uses a given frequency at any moment, thereby eliminating simultaneous interference while maintaining multi-radio functionality
Solution Approach 2:
The patent implements dynamic frequency allocation where the central control entity continuously monitors the operational states of multiple transceivers and adjusts frequency channel assignments in real-time. When interference is detected or predicted, the system dynamically reassigns frequency channels or adjusts transmission parameters to mitigate interference while optimizing network performance
2Adaptability or versatility
If transceivers are co-located on the same device platform, then device functionality is improved, but radio power leakage and interference increase
Solution Approach 1:
The patent introduces a central control entity as an intermediary between multiple co-located transceivers. This intermediary monitors the operational states of all transceivers, predicts potential interference scenarios, and coordinates frequency channel assignments to prevent power leakage interference. The central control entity acts as a mediator that resolves conflicts between co-located transceivers before they occur
Solution Approach 2:
The patent implements preliminary interference prediction and prevention mechanisms. The central control entity predicts potential interference scenarios based on the operational states of multiple transceivers and proactively adjusts frequency channel assignments before interference occurs. This preliminary action prevents radio power leakage issues rather than reacting to them after they manifest
3Reliability
If filtering is used to mitigate interference, then signal quality is improved, but filtering effectiveness is insufficient for severe interference
Solution Approach 1:
The patent changes the fundamental parameter of frequency channel assignment to prevent interference at its source. Instead of relying on filtering to mitigate interference after it occurs, the system dynamically adjusts frequency channels, time slots, and transmission powers of multiple transceivers to eliminate the conditions that generate interference, making filtering unnecessary for severe interference scenarios
Data Source
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AI summary
A wireless device having a central control entity that coordinates multiple radio transceivers co-located within the same device platform to mitigate coexistence interference. The wireless device comprises an LTE transceiver, a WiFi transceiver, a BT transceiver, or a GNSS receiver. In one embodiment, the central control entity receives radio signal information from the transceivers and determines control information. The control information is used to trigger FDM solution such that the transceivers operate in designated frequency channels to mitigate co-existence interference. In another embodiment, the central control entity receives traffic and scheduling information from the transceivers and determines control information. The control information is used to trigger TDM solution such that the transceivers are scheduled for transmitting or receiving radio signals over specific time duration to mitigate co-existence interference. In yet another embodiment, power control solution is used to mitigate coexistence interference.