Cross Layer Design to Evaluate Scalable Video Traffic in Multihop Cognitive Radio Environment
Salman Saadat · 2016
Cognitive radios use idle slots in the already assigned licensed frequency bands for communication in such a way that it does not affect the service being offered to the existing user in that band. The aim of cognitive radio network is to improve the spectrum efficiency and to increase the overall channel utilization which is a scarce resource. Multimedia traffic is especially suited to such environment due to its less stringent constraints on the packet losses as compared to other data traffic. This paper suggests a cross layer design to differentiate different packet types based on their source on upper layers in a cognitive radio network. This approach is then used to evaluate the performance of video standards MPEG2 and MPEG4. Video standards and the suggested design are tested in the cognitive radio environment under mobility and non mobility conditions over multihops with varying traffic conditions. Results are gathered using simulations in network simulator. Our analysis indicates that MPEG4 is much more suited to cognitive radio networks as compared to MPEG2 for the tested conditions.