Wireless Coexistence Interference Management via Dynamic Power Adjustment
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Solution Overview
Problem
In shared radio frequency environments, wireless devices often interfere with each other, leading to decreased signal integrity and increased bit errors, as they operate on different wireless services without effective coexistence management.
Innovation Solution
A wireless device equipped with a coexistence interference manager (CIM) that includes an interference-identifier module and a transmit power adjuster, which detects interference and adjusts the transmit power to mitigate coexistence interference by reducing the power level of its RF signal, thereby enhancing signal integrity and user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If wireless devices transmit RF signals at high power levels in a shared RF environment, then transmission distance and coverage are improved, but interference with other wireless devices increases leading to decreased signal integrity
Solution Approach 1:
The patent implements dynamic transmit power adjustment where the wireless device continuously monitors the RF environment and adjusts its transmit power level based on detected interference conditions. The transmit power adjuster module dynamically modifies power levels to optimize both transmission distance and signal integrity, resolving the contradiction between coverage and reliability.
Solution Approach 2:
The patent changes the transmit power parameter dynamically based on interference conditions. When interference is detected, the system adjusts the power parameter to reduce transmission power, thereby maintaining signal integrity. This parameter change allows the system to adapt to varying RF environments and resolve the contradiction between transmission distance and signal quality.
2Device complexity
If wireless devices operate without coexistence management, then device complexity is reduced, but interference between different wireless services increases leading to increased bit errors
Solution Approach 1:
The patent implements self-service coexistence management where the wireless device autonomously monitors its own transmissions and detects interference caused to other wireless devices. The interference-identifier module and transmit power adjuster work together to automatically resolve interference issues without external intervention, maintaining reliability while keeping the system relatively simple.
Solution Approach 2:
The patent employs feedback mechanisms where the wireless device continuously monitors the RF environment and uses this information to adjust its transmit power. This closed-loop feedback system allows the device to automatically respond to interference conditions, improving bit error performance without requiring complex external coexistence management protocols.
3Reliability
If transmit power is reduced to mitigate interference, then signal integrity of other wireless devices is improved, but transmission distance and coverage are decreased
Solution Approach 1:
The patent uses dynamic power adjustment to resolve this contradiction. Rather than using a fixed low power level, the system continuously adapts its transmit power based on real-time interference detection. When interference is present, power is reduced to protect signal integrity; when the environment is clear, power is increased to maximize transmission distance, thus resolving the contradiction dynamically.
Solution Approach 2:
The patent performs preliminary interference detection before adjusting transmit power. The interference-identifier module proactively scans the RF environment and detects potential interference conditions, allowing the transmit power adjuster to preemptively reduce power levels before interference occurs. This preliminary action prevents signal degradation while maintaining the ability to transmit at optimal power levels when conditions permit.
Data Source
AI summary
The present disclosure allows for a wireless device that can include a transceiver that transmits a radio frequency (RF) signal at an RF power level. The RF signal can propagate through an RF environment that is shared by multiple interference-susceptible wireless devices. The wireless device can also include an interference-identifier module that determines if the RF signal decreases a measure of the integrity of another RF signal that is transmitted between two or more interference-susceptible wireless devices. The wireless device can also include a transmit power adjuster that adjusts the transmit power to increase the signal integrity metric when the interference-identifier module has determined that the RF signal has decreased the signal integrity metric. Alternatively, the wireless device may transmit a control message that is indicative of the identified coexistence interference to a remote transmitter. The control message may result in a transmit power adjustment of the remote transmitter.