Application-Level and User-Level QoS Assessment of Audio-Video IP Transmission over Cross-Layer Designed Wireless Ad Hoc Networks

This paper performs application-level QoS and User-level QoS assessment of audio-video streaming in cross-layer designed wireless ad hoc networks. In order to achieve high QoS at the user-level. we employ link quality-based rowing in the network layer and media synchronization control in the application Layer. We adopt three link quality-based routing protocols: OLSR-SS (Signal Strength), AODV-SS, and LQHR (Link Quality Based Hybrid Routing). OLSR-SS is a proactive routing protocol, while AODV-SS is a reactive one. LQHR is I hybrid protocol. which is a combination of proactive and reactive routing protocols. For application-level QoS assessment, we performed Computer simulation with ns-2 where an IEEE 802.11b mesh topology network with 24 nodes was assumed. We also assessed user-level QoS by a subjective experiment with 30 assessors. From the assessment results. we find AODV-SS the best for networks with long inter-node distances. while LQHR outperforms AODV-SS for short inter-node distances. fit addition. we also examine characteristics of the three schemes with respect to the application-level QoS in random topology networks.