A Capacity and Utilization Study of Mobile Ad Hoc Networks

  • Authors:
  • Nishant Gupta;Samir R. Das

  • Affiliations:
  • -;-

  • Venue:
  • LCN '01 Proceedings of the 26th Annual IEEE Conference on Local Computer Networks
  • Year:
  • 2001

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Abstract

We develop an empirical technique to determine the ca-pacity of a mobile ad hoc network. We assume that thenetwork runs on-demand routing and carrier sense-basedmedium access protocols. The technique, however, is gen-eral and should apply to other types of protocols. We de-velop a tool that determines the network capacity givensession-level traffic and node mobility traces. We comparethe network capacity so determined with the actual networkutilization from output statistics generated by a compre-hensive simulator. It s observed that network capacity n-creases with node mobility; but the routing and mediumaccess protocols fail to take advantage of the increasedcapacity. Even with high loads, a significant port on ofthe network capacity is not utilized, while the routing per-formance remains poor. This study indicates that there sa significant scope for designing aggressive routing pro-tocols that utilize the network capacity better to improverouting performance.