A Novel Approach for Video Transmission in MANET

Abstract — MANETs are becoming more essential to wireless communication because of increasing popularity of mobile devices. However, MANETs does not seem to effectively support live video transmission and multimedia applications. The main objective of this work is to improve the performance of real-time video transmission using cross layer technique. The main obstacle in real-time video transmission is delay-jitter. The proposed strategy minimizes delay-jitter problem using the cross layer approach from the integration of MAC, network and transport layer. At the MAC layer, traffic classifier is used to classify various application data using IEEE 802.11e. Various application data i.e. video, voice, text etc are classified and a separate queue of specific data is formed for each application.. At the network layer, SNR information is used that is provided by the MAC layer. A predefined threshold is used at the network layer. If the received SNR is less than a predefined threshold, then the new route discovery process is initiated. At the application layer Application Packet Rate Controller (APRC) function is used. The APRC feedback packet is received from the receiver end and on the basis of information in the feedback packet flow control is adjusted at the application layer. This process minimizes congestion in the channel and hence delay jitter is reduced. We also provided SNR information from the MAC layer in the APRC feedback packet. The advantage is that if the channel is congested due to poor range between sender and receiver, then also the flow control is adjusted accordingly