Dynamic Carrier Frequency Reconfiguration for Wireless Coverage
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Solution Overview
Problem
Wireless communication systems face limitations in peak data communication rates due to bandwidth constraints on individual carrier frequencies, which can be exacerbated by poor wireless coverage and interference, limiting the effective data rate for wireless communication devices (WCDs).
Innovation Solution
Implementing a wireless air interface with paired low-frequency and high-frequency channels, where the low-frequency channels include a low-frequency downlink and uplink, and the high-frequency channels include a high-frequency downlink and uplink, and reconfiguring these channels based on the WCD's coverage quality to optimize communication by shifting high-frequency uplink channels to low-frequency downlink channels and vice versa during poor coverage conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-frequency channels are used for downlink communication, then data communication rate is improved, but uplink transmission quality deteriorates due to increased path loss
Solution Approach 1:
The patent implements dynamic channel reconfiguration where the base station can switch between high-frequency and low-frequency channels based on real-time coverage conditions. When uplink coverage deteriorates, the system dynamically transitions to low-frequency channels for uplink transmissions, while maintaining high-frequency channels for downlink when coverage is acceptable, thus adapting to changing propagation conditions
Solution Approach 2:
The patent changes the frequency parameter of the communication channels based on coverage quality assessment. The base station monitors downlink coverage conditions and adjusts the operating frequency from high-frequency to low-frequency bands when coverage deteriorates, thereby modifying the physical parameter to optimize both uplink and downlink performance
2Productivity
If bandwidth is increased to improve data rate, then peak data communication rate is improved, but system complexity increases due to carrier aggregation requirements
Solution Approach 1:
The patent segments the wireless spectrum into distinct high-frequency and low-frequency channel sets, with each segment serving specific functions. The high-frequency segment provides capacity when coverage is good, while the low-frequency segment ensures reliability when coverage deteriorates, avoiding the need for complex carrier aggregation across multiple frequency bands
Data Source
AI summary
A wireless air interface may be defined for communication with a wireless communication device (WCD). The wireless air interface may include paired low-frequency channels and paired high-frequency channels, where the paired low-frequency channels include a low-frequency downlink channel and a low-frequency uplink channel, and where the paired high-frequency channels include a high-frequency downlink channel and a high-frequency uplink channel. It may be determined that, on at least one of the downlink or uplink channels, the WCD is experiencing a quality of wireless coverage below a threshold wireless coverage value. Possibly in response to the WCD experiencing the quality of wireless coverage below the threshold wireless coverage value, the downlink and uplink channels may be reconfigured so that the paired low-frequency channels include two low-frequency uplink channels and the paired high-frequency channels include two high-frequency downlink channels.