Simple Models for the Performance Evaluation of a Class of Two-Hop Relay Protocols

Ahmad Al Hanbali, Arzad A. Kherani, Philippe Nain

Research output: Contribution to conferencePaper

14 Citations (Scopus)


We evaluate the performance of a class of two-hop relay protocols for mobile ad hoc networks. The interest is on the multicopy two-hop relay (MTR) protocol, where the source may generate multiple copies of a packet and use relay nodes to deliver the packet (or a copy) to its destination, and on the two-hop relay protocol with erasure coding. Performance metrics of interest are the time to deliver a single packet to its destination, the number of copies of the packet at delivery instant, and the total number of copies that the source generates. The packet copies at relay nodes have limited lifetime (time-to-live TTL). Via a Markovian analysis, the three performance metrics of the MTR protocol are obtained in closed-from in the case where the number of the copies in the network is limited. Also, we develop an approximation analysis in the case where the inter-meeting times between nodes are arbitrarily distributed and the TTLs of the copies are constant and all equal. In particular, we show that exponential inter-meeting times yield stochastically smaller delivery delays than hyper-exponential inter-meeting times, and that exponential TTLs yield stochastically larger delivery delays than constant TTLs. Finally, we characterize the delivery delay and the number of transmissions in the two-hop relay protocol with erasure coding and compare this scheme with the multicopy scheme.
Original languageUndefined
Publication statusPublished - 2007
Event6th International IFIP-TC6 Networking Conference, NETWORKING 2007 - Atlanta, GA, USA
Duration: 14 May 200718 May 2007


Conference6th International IFIP-TC6 Networking Conference, NETWORKING 2007
OtherMay 14-18, 2007


  • IR-77031
  • Mobile ad hoc network - Two-hop relay protocol - Erasure coding - Mobility model - Analytical model - Markovian analysis - Performance evaluation

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