关键词: 调度算法, 实时业务, 无线局域网, WRR-CSDPS

Abstract:

An efficient real-time traffic scheduling algorithm for WLAN(Wireless Local Area Networks) was proposed based on the classic WRR (Weighted Round Robin) discipline. The algorithm was operated at link layer level, and was coupled closely with DCF(Distributed Coordinate Function). Through that, the HOL(Head Of Line) blocking problem was alleviated. With compensation for mobile users experiencing burst channel error, the long-term fairness approximately was achieved. Extensive simulations were performed using NS(Network Simulator). The results show that the algorithm is simple,and improves the channel utilization and data throughput effectively. The average packet delay is also decreased.

Key words:  scheduling algorithm, real-time traffic, WLAN, WRR-CSDPS