Dynamic Frequency Selection for Wireless Devices
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Solution Overview
Problem
Wireless communication devices face inefficiencies in selecting optimal frequencies for communication with wireless access nodes due to varying signal characteristics across different frequency bands, leading to suboptimal RF resource utilization.
Innovation Solution
A wireless communication device and method that detect multiple frequencies and threshold values from a wireless access node, determine distance, and select the appropriate frequency based on predefined thresholds, with an option to request frequency selection from the access node if the distance falls between thresholds, using altitude and communication loading levels for optimal frequency choice.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a wireless communication device uses a single frequency for communication with a wireless access node, then the device complexity is reduced, but the RF resource utilization efficiency deteriorates
Solution Approach 1:
The patent implements dynamic frequency selection where the wireless communication device automatically chooses between first and second frequencies based on real-time distance measurements and threshold comparisons. The frequency selection is not static but adapts dynamically according to the device's proximity to the access node, optimizing RF resource utilization without requiring complex manual configuration.
Solution Approach 2:
The system changes the operating frequency parameter based on distance conditions. When the distance to the access node falls below a first threshold, the device uses the first frequency; when it exceeds a second threshold, it uses the second frequency. This parameter adaptation allows efficient RF resource utilization across varying communication conditions while maintaining relatively simple device architecture.
2Productivity
If a wireless communication device selects frequency based on distance thresholds, then the RF resource utilization efficiency is improved, but the measurement precision requirement increases
Solution Approach 1:
The patent segments the communication space into distinct regions defined by distance thresholds. The first threshold defines a boundary for using the first frequency, and the second threshold defines a boundary for using the second frequency. By dividing the continuous distance range into discrete zones with specific frequency assignments, the system reduces the precision requirements compared to continuous frequency adjustment, while still achieving efficient RF resource utilization.
3Adaptability or versatility
If the wireless communication device requests frequency selection from the access node when distance falls between thresholds, then the adaptability is improved, but the communication latency increases
Solution Approach 1:
When the distance measurement falls between the first and second thresholds, the patent introduces an intermediary mechanism where the device requests frequency selection from the access node. The access node acts as a mediator that provides the final frequency selection decision, allowing the device to adapt to intermediate conditions while offloading the decision-making complexity to the network side, thus balancing adaptability with acceptable latency.
Data Source
AI summary
A wireless communication device comprises a wireless communication transceiver and a processing system. The wireless communication transceiver is configured to detect first and second frequencies transmitted from a wireless access node and to receive first and second threshold values transmitted from the wireless access node. The processing system is configured to determine a distance between the wireless communication device and the wireless access node, compare the distance to the first threshold value, and if the distance falls below the first threshold value, select the first frequency. The processing system is further configured to compare the distance to the second threshold value, and if the distance exceeds the second threshold value, select the second frequency. The wireless communication transceiver is configured to exchange wireless communications with the wireless access node using the selected frequency.