Performance evaluation of H.264 protocol in ad hoc networks

  • Authors:

  • Tarek R. Sheltami

  • Affiliations:

  • King Fahd University of Petroleum and Minerals

  • Venue:
  • Journal of Mobile Multimedia
  • Year:
  • 2008

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Abstract

Wireless mobile ad hoc network data transmission between multiple senders and receivers is becoming increasingly important in nowadays networks. There are many applications for sending data from a single source to multiple destinations (e.g. broadcasting) or from multiple senders to multiple receivers (e.g. teleconference). A wireless Mobile Ad hoc Network (MANET) or a multi-hop network is a collection of wireless mobile hosts forming nodes that arbitrarily and randomly change their locations. No centralized administration or infrastructure is supported, and each host communicates via radio packets. Nodes are responsible for establishing and maintaining connections between themselves. Such dynamic topology of MANET leads to several unique design issues that do not exist in other wireless networks. Video transport over ad hoc networks is more challenging than that over other wireless networks. The wireless links in an ad hoc network are not error resilient and can go down frequently because of node mobility, interference, channel fading, and the lack of infrastructure. Moreover, typical video applications may need a higher bandwidth and higher reliability connection than that provided by a single link in current or emerging wireless networks. On the other hand, it is possible to establish multiple paths between a source and a destination. Transporting video over wireless networks is further constrained by: delay limits, power issues and quality of service (QoS) parameters. All of these points should be handled carefully in video transport services. The goal of this research is to calculate the maximum distance, or number of hops, that can be supported in an ad hoc network while maintaining the delay constraints and reasonable quality of service (QoS). In this paper, we will evaluate the performance of H.264 protocol using two routing protocols, mainly: the Neigbhor-Aware Clusterhead (NAC) and the Dynamic Source Routing (DSR) protocols. The simulation results show that it is feasible to have video over ad hoc within an average distance of 6 hops utilizing an average of 5.5 Mbps, however the performance varies from one protocol to another.