A queuing mechanism for H.264 video in MANET

Includes bibliographical references (pages 54-56).Mobile ad-hoc network (MANET) is a collection of mobile nodes, which form a wireless network without the use of an existing infrastructure. MANET's are usually characterized by mobility of nodes and communication over multiple hops. Hence, MANET links are short lived and the topology is very dynamic. In order to simulate a new protocol for MANET, it is necessary to use a mobility model that accurately represents the mobile nodes (MN's) that will eventually utilize the given protocol. Only in this type of scenario is it possible to determine whether or not the proposed protocol will be useful when implemented. The existing mobility model generator are random and do not depict the scenarios that are needed for successful evaluation of a protocol for MANET. Hence we propose a new mobility model generator for MANET mobility and discuss few proposed scenarios generated for emergency scenarios. In later part we discuss the challenges of streaming multimedia over MANET's. Extensive research has already been done to ensure a smooth and uninterrupted multimedia transmission to a mobile node (MN). Before sending packets into the packets, video is compressed by the encoder by reducing/removing redundancies from the video data. After compression different video packets have relatively different importance. MANETs do not have the ability to serve the multimedia information based on this relative importance of the packets. Hence, we propose a Queuing mechanism to consider the relative importance of this multimedia information and achieve a Quality of Service (QoS) for transmission of Multimedia information over Mobile ad-hoc network. The simulation results obtained have shown that the higher priority packets have achieved better throughput compared to relatively lower priority packets. This will result in a better streaming quality of multimedia information over MANET's