Jitter management in multipath routing for mobile AD HOC network

Abstract

Mobile Ad Hoc Networks (MANETs) are infrastuctureless network. This can be deployed without existence of base station. Therefore, each node in the network must be capable of performing as host and router. One important problem of the ad hoc network is "routing". The network has to find appropriate paths from source to destination which has not been known yet. To satisfy today's requirements, ad hoc network should be capable of traversing multimedia applications. That is why the routing mechanism should also take into account the basic requirements of such applications. Jitter is one of most important metrics in real-time multimedia data transfer. Jitter should be kept as minimum as possible in order to get high quality multimedia transmission. Jitter control can be reduced by simple technique of buffering packet. In the multihop environment, the end-to-end jitter is a summation hop-by-hop jitter. Therefore, jitter control is applied to each intermediate node instead of at only the receiver. Multipath routing is another routing strategy in ad hoc network environment. Route dicovery process will find more than one valid route. Only one route is used for data transmission. The others are dedicated for backups and being monitored periodically to obtain jitter information. If there is a better path along data transmission process, it will be switched to the new path. By accomplishing this scheme, we can achieve ad-hoc multimedia communication routes with sufficiently low jitter.