Wireless Device Spectrum Sensing Parameter Adjustment
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Solution Overview
Problem
In wireless communication systems using unlicensed spectrum resources, failed information transmission often occurs due to interference from hidden nodes or changes in link quality, making it difficult to determine the cause of failure and adjust spectrum sensing parameters appropriately.
Innovation Solution
An electronic device and user equipment that acquire NACK messages and failure cause information to differentiate between link quality and non-link quality causes of failed transmission, adjusting spectrum sensing parameters only when the cause is non-link quality to enhance transmission success, and informing a spectrum management server for parameter adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If spectrum sensing parameters are adjusted to reduce interference from hidden nodes, then transmission reliability improves, but system complexity increases due to need for cause differentiation
Solution Approach 1:
The patent segments the cause of transmission failure into two distinct categories: link quality causes and non-link quality causes (such as hidden node interference). By differentiating between these segments, the system can apply appropriate responses - adjusting spectrum sensing parameters only for non-link quality causes while avoiding unnecessary adjustments for link quality issues, thus improving reliability without excessive complexity
Solution Approach 2:
The patent implements a feedback mechanism where the receiving end sends failure cause information back to the transmitting end. This feedback enables the transmitting end to identify whether transmission failure was caused by link quality issues or non-link quality issues, allowing for targeted adjustment of spectrum sensing parameters and avoiding unnecessary complexity from blanket parameter adjustments
2Measurement precision
If energy detection threshold is reduced to extend sensing range, then hidden node detection improves, but false detection increases due to link quality variations
Solution Approach 1:
The patent makes the energy detection threshold dynamic rather than fixed. The threshold is adjusted based on the identified cause of transmission failure - it is reduced only when non-link quality causes (hidden node interference) are detected, while maintaining higher thresholds when link quality variations are the cause, thus improving detection precision without increasing false detections
Solution Approach 2:
The patent changes the energy detection threshold parameter conditionally based on the type of transmission failure. By analyzing failure cause information and adjusting the threshold parameter accordingly, the system achieves better hidden node detection when needed while avoiding false detections during normal link quality variations
3Object-affected harmful factors
If contention window size is increased to reduce spectrum access probability, then interference reduction improves, but transmission efficiency decreases
Solution Approach 1:
The patent applies partial action by adjusting the contention window size only when non-link quality causes (hidden node interference) are identified as the reason for transmission failure. When link quality causes are detected, no contention window adjustment is made, thus reducing interference when necessary while maintaining transmission efficiency during normal link conditions
Data Source
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AI summary
The disclosure relates to an electronic device in a wireless communication system, comprising: processing circuitry configured to: acquire, during a preset time period, one or more ACK messages indicating successful information transmission between the electronic device and a receiving end in the wireless communication system and one or more NACK messages indicating failed information transmission between the electronic device and the receiving end; determine, based on the ACK messages and the NACK messages, whether a probability of successful information transmission between the electronic device and the receiving end is increased; and in response to determining that the probability of successful information transmission is increased, generate a spectrum sensing parameter information for adjusting a spectrum sensing parameter of the electronic device..