The impact of RTS/CTS on performance of wireless multihop ad hoc networks using IEEE 802.11 protocol

There has been a growing interest in multihop wireless ad hoc networks in recent years. Previous studies have shown that, when using the IEEE 802.11 DCF protocol in a wireless ad hoc network, the maximum end-to-end good put is achieved when all nodes are within transmission range of each other. The main reason is that the channel spatial reuse factor gained from the multihop network does not match the increase in additional transmission hops that a packet needs to travel in a multihop network. For a multihop network, its MAC frame delivery capacity is approximately fixed at a value dependent on its spatial reuse factor. If the offered load increases, less capacity will be spent on delivering packets that eventually reach their destinations and hence resulting in lower end-to-end goodput. The throughput and the mean frame delay will be varied for different RTS/CTS threshold values and the numbers of station. We will show that the system throughput of the multihop network is in general lower than that of a single-hop network whether the RTS/CTS mechanism is used or not.

[1]  Kevin R. Fall,et al.  Ns: notes and documentation , 1997 .

[2]  Pradipta De,et al.  Quality of service guarantee on 802.11 networks , 2001, HOT 9 Interconnects. Symposium on High Performance Interconnects.

[3]  Mario Gerla,et al.  GloMoSim: A Scalable Network Simulation Environment , 2002 .

[4]  Marek Natkaniec,et al.  An analysis of the backoff mechanism used in IEEE 802.11 networks , 2000, Proceedings ISCC 2000. Fifth IEEE Symposium on Computers and Communications.

[5]  T. Saadawi,et al.  Does IEEE 802 . 11 MAC Protocol Work Well in Multi-hop Wireless Ad Hoc Networks ? , 2001 .

[6]  David A. Maltz,et al.  Dynamic Source Routing in Ad Hoc Wireless Networks , 1994, Mobidata.

[7]  A. Girotra,et al.  Performance Analysis of the IEEE 802 . 11 Distributed Coordination Function , 2005 .

[8]  Ting-Chao Hou,et al.  Performance Evaluation of Wireless Multihop Ad Hoc Networks Using IEEE 802.11 DCF Protocol , 2003 .

[9]  Ramón Agüero,et al.  Optimizing Internet flows over IEEE 802.11b wireless local area networks: a performance-enhancing proxy based on forward error correction , 2001 .

[10]  David A. Maltz,et al.  The effects of on-demand behavior in routing protocols for multihop wireless ad hoc networks , 1999, IEEE J. Sel. Areas Commun..

[11]  Hung-Yun Hsieh,et al.  IEEE 802.11 over multi-hop wireless networks: problems and new perspectives , 2002, Proceedings IEEE 56th Vehicular Technology Conference.

[12]  Tzu-Jane Tsai,et al.  A access-based clustering protocol for multihop wireless ad hoc networks , 2001, IEEE J. Sel. Areas Commun..

[13]  Marek Natkaniec,et al.  An analysis of the influence of the threshold parameter on the IEEE 802.11 network performance , 2000, 2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540).

[14]  Louise E. Moser,et al.  An analysis of the optimum node density for ad hoc mobile networks , 2001, ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240).

[15]  Bruce Tuch,et al.  Development of WaveLAN®, an ISM band wireless LAN , 1993, AT&T Technical Journal.

[16]  Eryk Dutkiewicz,et al.  Impact of transmit range on throughput performance in mobile ad hoc networks , 2001, ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240).