A New MAC Protocol for Improving the End-to-End Performance in Multi-Hop Wireless Ad Hoc Networks

Jaikwan JOO
Sunghak LEE
Hyunsoo YOON

IEICE TRANSACTIONS on Communications   Vol.E87-B    No.9    pp.2638-2640
Publication Date: 2004/09/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section LETTER (Special Section on Networking Technologies for Mobile Internet Systems)
Category: Ad Hoc Network
wireless ad hoc network,  IEEE 802.11,  wireless LAN,  MAC,  on-demand routing protocol,  multi-hop network,  

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Since IEEE 802.11 has many problems such as hidden node, exposed node problem, larger sensing function and BEB (Binary Exponential Back-off), it is not suitable for use in multi-hop wireless ad hoc network. When an on-demand routing protocol is used with 802.11 DCF (Distributed Coordination Function), the route to transmit the packet will be formed by nodes which have less competition (fewer neighbors) than others for the medium access. This effect will make that the routing path will be longer and decrease network performance. Therefore, we propose a new MAC (Medium Access Control) protocol that makes a shorter routing path, enabling better performance in multi-hop wireless ad hoc networks. The protocol modifying IEEE 802.11 DCF gives priority to the node with more neighbors and with less transmission. Through simulations, we have demonstrated that the proposed algorithm improves performance in terms of transmission rate, transmission delay and total consumption energy.