An efficient scheduling scheme for DQRUMA to support real-time traffic in wireless packet-switched networks

The requirement on providing real-time data service by wireless networks is a critical issue in the design of current wireless networks. Distributed queueing request update multiple access (DQRUMA) is proposed as a demand assignment medium access control (MAC) protocol to efficiently control the medium sharing by multiple mobile users. With help of a packet transmission policy, DQRUMA has a potential to provide QoS service for the time-constrained burst data traffic. In this paper, we study the problem of providing real-time service to the ATM packets with or without time constraints in the wireless networks. In particular, we propose a novel scheduling scheme for the DQRUMA protocol to control the packet transmission in the wireless packet-switched networks. We have conducted extensive simulation experiments to evaluate the performance of the proposed algorithm and compare its real-time performance with those of other packet transmission policies. This study proves that the new algorithm is an efficient transmission policy for the DQRUMA to support real-time service in wireless networks.