Frame Offset Adjustment for Interference Cancellation Efficiency
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Solution Overview
Problem
As the number of wireless devices served by a wireless access node increases, so does interference on communication channels, leading to issues like dropped frames, data loss, and reduced voice quality due to inefficient use of allocated spectrum.
Innovation Solution
A method where a wireless access node monitors channel loading, calculates the efficiency of interference cancellation, and modifies the frame offset on reverse link communication channels when efficiency falls below a threshold to optimize noise cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple wireless devices operate in the same frequency to increase spectrum utilization, then communication capacity increases, but interference between devices increases
Solution Approach 1:
The access node performs preliminary actions by adjusting frame offsets proactively before interference severely degrades communication. The system monitors loading levels and preemptively modifies timing parameters to prevent interference from reaching critical levels, rather than reacting after degradation occurs.
Solution Approach 2:
The invention changes the frame offset parameter dynamically based on channel loading conditions. When loading exceeds a threshold, the access node modifies the frame offset parameter to optimize interference cancellation efficiency, thereby maintaining communication capacity while reducing interference effects.
2Reliability
If interference cancellation mechanisms are used to reduce interference, then communication quality improves, but system complexity increases
Solution Approach 1:
The access node applies different frame offset adjustments to different reverse link channels based on their specific loading conditions and interference characteristics. Rather than applying a uniform complex interference cancellation system to all channels, the system locally optimizes each channel's timing parameters based on actual conditions.
Solution Approach 2:
The system implements feedback mechanisms where the access node monitors interference cancellation efficiency and adjusts frame offsets accordingly. This closed-loop approach allows the system to adapt to changing conditions and maintain communication quality while managing complexity through data-driven adjustments.
3Productivity
If frame offset is modified to optimize interference cancellation, then noise cancellation efficiency improves, but communication latency increases
Solution Approach 1:
The system applies partial frame offset adjustments only when and where necessary, rather than continuously modifying timing parameters. By threshold-based triggering, the system avoids excessive adjustments that would introduce unnecessary latency while still achieving sufficient noise cancellation efficiency improvement.
Data Source
AI summary
A wireless access node comprises a wireless communication transceiver and a processing system. The wireless communication transceiver is configured to exchange wireless communications with a plurality of wireless communication devices over a plurality of wireless communication channels. The processing system is configured to monitor a loading level on the wireless communication channels to determine when the loading level exceeds a loading threshold, and when the loading level exceeds the loading threshold, calculate an efficiency of an interference cancellation process, compare the efficiency of the interference cancellation process to an efficiency threshold, and if the efficiency of the interference cancellation process falls below the efficiency threshold, modify a frame offset in use by the wireless communication devices on at least one reverse link communication channel.