Wireless TXOP Scheduling for Fair Uplink and Downlink Throughput
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Solution Overview
Problem
The existing wireless communication systems face issues of unfairness in throughput between wireless stations (STAs) due to improper selection of STAs for uplink and downlink data transmissions, leading to decreased performance and resource inefficiencies.
Innovation Solution
A scheduling unit for TXOP granting determines STAs with lower uplink or downlink data transmission quality to prioritize them as TXOP responders or holders, using parameters like frame error rate, throughput ratio, and traffic volume to optimize TXOP allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If TXOP is granted to STAs with higher throughput quality, then system efficiency is improved, but fairness among STAs deteriorates
Solution Approach 1:
The patent changes the selection parameter from throughput quality to transmission quality (such as frame error rate). By using inverse quality metrics (higher error rate = lower quality), the system can prioritize STAs with poorer transmission conditions, achieving both fairness and improved overall system performance through differentiated resource allocation.
2Device complexity
If TXOP allocation is based on random access scheme, then simplicity is maintained, but hidden terminal problem causes performance degradation
Solution Approach 1:
The patent introduces feedback mechanisms where STAs report their transmission quality metrics (frame error rate, throughput) to the AP. The AP uses this feedback information to make informed TXOP allocation decisions, resolving the hidden terminal problem while maintaining relatively simple access procedures through quality-based prioritization.
3Reliability
If TXOP is granted uniformly to all STAs, then fairness is improved, but resource utilization efficiency deteriorates
Solution Approach 1:
The patent applies local quality differentiation by allocating TXOP opportunities based on individual STA transmission qualities. Instead of uniform allocation, each STA receives TXOP priority according to its specific transmission conditions (frame error rate, throughput), achieving fairness through differentiated resource allocation that adapts to local channel conditions.
Data Source
AI summary
Provided is a wireless communication system in which, based on a random access scheme, a transmission opportunity (TXOP) acquired by a wireless access point is granted to a wireless station when performing uplink data transmission from the wireless station to the wireless access point and the TXOP acquired by the wireless station is granted to the wireless access point when performing downlink data transmission from the wireless access point to the wireless station, the system includes a scheduling unit for TXOP granting determining one or more wireless stations having a quality of an uplink data transmission lower than a prescribed value as TXOP responders to which the wireless access point grants the TXOP, and determining one or more wireless stations having a quality of a downlink data transmission lower than the prescribed value as TXOP holders which grant the TXOP to the wireless access point.