Comparison of ECN-ELFN and SACK on TCP's Performance for Ad Hoc Networks

摘要

In this paper we study the energy cost (protocol processing and communication cost) and goodput of two different flavors of TCP in ad hoc networks. We implemented a testbed and measured the actual energy cost as well as goodput of running TCP-SACK in ad hoc network scenarios. We also implemented Explicit Link Failure Notification (ELFN) and Explicit Congestion Notification (ECN) in Newreno and measured its performance. We see that the use of ECN & ELFN does yield higher goodput in most cases with a corresponding lower total energy cost. We see an energy savings of between 20% and 500% depending on the network conditions.