Mobile Networks and Applications

, Volume 17, Issue 2, pp 258–266 | Cite as

Throughput Analysis of a Cooperative ARQ Scheme in the Presence of Hidden and Exposed Terminals

  • Jesus Alonso-ZarateEmail author
  • Luis Alonso
  • Georgios Kormentzas
  • R. Tafazolli
  • Christos Verikoukis


Cooperative Automatic Retransmission Request (C-ARQ) schemes exploit the broadcast nature of the radio channel by allowing those users which overhear a transmission to act as spontaneous relays when a packet has been received with errors at destination. Transmission takes place in two phases. First, the source transmits to the destination. In the case of error, retransmissions are then executed by the relays, providing the system with cooperative diversity. In this paper we analyze how the addition of these relays to the communication modifies the well-known hidden and exposed terminal problems associated to any medium access control protocol based on carrier sensing. This work is focused on Carrier Sensing Multiple Access (CSMA) protocols, such as the one defined in the IEEE 802.11 Standard. The theoretical study presented in this paper has been supported by computer-based simulations.


PRCSMA 802.11 MAC hidden terminals exposed terminals cooperative ARQ C-ARQ 


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Jesus Alonso-Zarate
    • 1
    Email author
  • Luis Alonso
    • 2
  • Georgios Kormentzas
    • 3
  • R. Tafazolli
    • 4
  • Christos Verikoukis
    • 1
  1. 1.Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)BarcelonaSpain
  2. 2.Department of Signal Theory and Comms.Universitat Politècnica de Catalunya (UPC)BarcelonaSpain
  3. 3.Department of Information and Communication Systems EngineeringUniversity of the AegeanKarlovasiGreece
  4. 4.Centre for Communication Systems ResearchUniversity of SurreyGuildfordUK

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