Adaptive Transport Format Selection for RF Self-Jamming Mitigation

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Solution Overview

Problem

Wireless communication devices experience RF self-jamming interference due to simultaneous use of multiple RF resource chains, leading to increased data transmission errors and power consumption as networks compensate with increased re-transmissions and power adjustments.

Innovation Solution

Implementing methods for adaptive transport format combination (TFC) selection in wireless communication devices to mitigate self-jamming interference by calculating and applying average transmit power reductions based on interference levels, data amounts, and power capabilities, thereby selecting optimal TFCs for reduced interference while maintaining performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If transmit power is reduced to mitigate RF self-jamming interference, then receiver interference is reduced, but data transmission errors increase

Engineering Contradiction:

ImproveRF self-jamming interferenceVSAvoiddata transmission error rate

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The system dynamically adjusts transmit power on a per-basic-processing-group basis rather than using a static power reduction. The network device sends power reduction indications for specific time intervals, and the wireless communication device adapts its transmit power dynamically to match these indications, allowing power reduction only when interference occurs while maintaining normal power when no interference is present.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The transmission time interval is divided into multiple basic processing groups, and power reduction is applied selectively to specific groups rather than uniformly across the entire transmission. This segmentation allows the system to reduce power only during intervals where self-jamming interference occurs, while maintaining full power during intervals where interference is absent.

Inventive Principle:

Principle #1Segmentation

2Object-affected harmful factors

If transmit power is reduced to mitigate RF self-jamming interference, then receiver interference is reduced, but power consumption increases due to re-transmissions

Engineering Contradiction:

ImproveRF self-jamming interferenceVSAvoidpower consumption

Core Design Contradiction:

Object-affected harmful factorsVSUse of energy by moving object

Solution Approach 1:

The system uses dynamic power adjustment based on real-time interference conditions rather than continuous power reduction. The network device monitors interference levels and sends power reduction indications only when needed, allowing the wireless communication device to maintain optimal power levels most of the time while reducing power only during specific intervals when self-jamming interference is detected.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

Power reduction is applied locally to specific basic processing groups where interference occurs, rather than applying a uniform reduction across all transmissions. This localized approach ensures that power is reduced only where and when necessary, minimizing the impact on overall transmission efficiency and power consumption.

Inventive Principle:

Principle #3Local quality

3Reliability

If transmit power is increased to maintain uplink error rate, then data transmission reliability is improved, but RF self-jamming interference increases

Engineering Contradiction:

Improveuplink error rateVSAvoidself-jamming interference level

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The network device performs preliminary detection of self-jamming interference and sends power reduction indications in advance before the interference can significantly impact reception. This allows the wireless communication device to reduce transmit power proactively during upcoming intervals where interference is expected, preventing the need to later increase power to compensate for errors.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The system implements a feedback mechanism where the network device monitors uplink reception quality and self-jamming interference levels, then sends power reduction indications back to the wireless communication device. This closed-loop feedback allows the system to maintain optimal power levels by continuously adapting to changing interference conditions.

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS10306562B2Transport format combination selection during self-jamming interference

Publication Date: 2019.05.28 QUALCOMM INC

AI summary

Embodiments include systems and methods for performing selection of a transport format combination by a device processor of a wireless communication device. The device processor may determine whether radio frequency self-jamming interference is detected at the receiver of the wireless communication device. The device processor may calculate an average transmit power reduction in response to determining that radio frequency self-jamming interference is detected at a receiver of the wireless communication device. The device processor may select a transport format combination based on the calculated average transmit power reduction, and may use the selected transport format combination to transmit data to a communication network.