Channel Allocation via Data Rate Variance in Wireless Systems
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Solution Overview
Problem
The existing channel allocation methods in wireless communication systems, particularly in CDMA 1xEV-DO and OFDMA systems, face challenges in achieving fairness and maximizing throughput, leading to inefficiencies and unfair resource distribution among mobile stations.
Innovation Solution
A channel allocation method where a base station calculates and arranges channels based on variance or average data rates to prioritize resource allocation, ensuring that channels are distributed to meet required data rates while maintaining fairness, with reallocation strategies to adjust for excess or insufficient resources, and using a scheduler to manage channel allocation efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If channels are allocated to mobile stations with the best channel status continuously, then system throughput is maximized, but fairness in resource allocation deteriorates
Solution Approach 1:
The patent changes the allocation parameter from purely channel status-based selection to a combined criterion that includes both channel status and fairness considerations. By introducing a fairness parameter in the allocation decision process, the system can balance throughput optimization with fair resource distribution among mobile stations.
Solution Approach 2:
The patent implements dynamic channel allocation where the base station continuously adjusts allocation decisions based on real-time channel status reports from mobile stations. The allocation strategy dynamically switches between throughput-optimized and fairness-optimized modes based on current system conditions, allowing the system to adapt to changing network states.
2Device complexity
If existing channel allocation methods are used in OFDMA systems, then implementation simplicity is maintained, but throughput and fairness deteriorate
Solution Approach 1:
The patent applies local quality by tailoring channel allocation strategies to specific OFDMA system conditions and mobile station requirements. Instead of using a universal allocation method, the system adjusts allocation criteria based on local channel conditions, mobile station capabilities, and traffic requirements to optimize throughput while maintaining fairness in the OFDMA context.
Data Source
AI summary
A channel allocation method in a BS that communicates on at least two channels in a wireless communication system is provided. The BS receives information related to the data rates of the available channels from the MSs within its cell area, calculates the variance of the data rates for each channel, arranges the channels according to the variances, and allocates the channels in the arranged order to the MSs to satisfy the required data rates of the traffic for the MSs.