Channel Reservation for Real-time Traffic in Wireless Network
Guanghong Wang · Computer Engineering and Applications Journal · 2006
With the rapid growth in popularity of wireless data services and the increasing demand for multimedia applications,future wireless networks will provide services for heterogeneous classes of traffic with different quality of service(QoS) requirements.It is critical to develop new technologies for providing QoS differentiation and guarantees inwireless networks.In this paper,we propose an efficient method to provide QoS for real-time traffic in IEEE 802.11 wireless LANs.Our method is to reserve channel for real-time data through modifying the DCF(Distributed CoordinationFunction) at MAC layer.Once a station has contended for the channel,it may transmit multiple real-time data frames continuously,named a TB(Transmission Burst),to the same destination if they exists in the queue.That is to say the first data frame in a TB will reserves the channel for the real-time traffic until the end of the TB.So the real-time traffic may occupy more channel resource than other traffic.Our method can increase the channel utilization in IEEE 802.11 wireless LAN.The simulation results show that our method can improve the throughput and delay performance of real-time traffic remarkably.In addition,our method does not introduce any additional control overhead.