QoS-Satisfied Multicast Routing Protocol for MANETs

Abstract

Mobile Adhoc Network (MANET) can operate with multiple data rates for Quality-of-Service (QoS)constrained multimedia communication. For such services, QoS-sensitive multicast protocols are necessary. A Delay-Sensitive Multicast Tree was built in many works in literature that estimates one-hop delay by using the measure of busy/idle fraction of the distributed radio channel and also adjusts the transmission data rates while reducing the end-to-end delay. But, different metrics rather than delay can be considered furthering enhancing the network performance. Therefore in this article, QoS-Satisfied Multicast (QSSM) routing protocols is proposed which considers additional network metrics like bandwidth utilization, packet drop rate and jitter to select the multicast route for data transmission. First, the considered metrics for each node are collected from the neighboring nodes. After that, multiple QoS-satisfied multicast trees are constructed using these metrics where each multicast tree can satisfy the predefined percentage of the QoS requirements. So, the overall delay and bandwidth consumption are minimized by ensuring the QoS guarantees a requested traffic flow and ongoing flows. Further, a randomized network coding scheme is applied to remove the unwanted data packets that increase the network capacity efficiently for multicasting. Finally, the simulation results exhibit that the QSSM protocol achieves a 0.62sec one-hop delay and 0.06sec end-to-end delay for the simulation time of 200sec compared to the other protocols.