DocumentCode :
1757495
Title :
CSMA/SF: Carrier Sense Multiple Access with Shortest First
Author :
Guanhua Wang ; Kaishun Wu ; Ni, Lionel M.
Author_Institution :
Dept. of Comput. Sci. & Eng., Hong Kong Univ. of Sci. & Technol., Kowloon, China
Volume :
13
Issue :
3
fYear :
2014
fDate :
41699
Firstpage :
1692
Lastpage :
1702
Abstract :
Energy efficiency is the main concern in wireless sensor networks (WSNs) due to devices\´ limited battery power. Because the heavy burden of nodes that near the sink, this "energy hole problem" makes nodes near the sink have faster energy depletion than others. Because of this, the lifetime of WSNs, to some extent, is determined by the power consumption of communication between sink and sensing nodes that near the sink. To address this issue, we propose CSMA/SF (Shortest First) protocol to reduce power consumption of sink-node communication by minimizing energy cost in carrier sense during nodes\´ channel contention. CSMA/SF modifies existed CSMA/CA MAC protocol. Instead of complete contention-based, CSMA/SF ensures nodes remaining shorter message has higher priority in contention by implementing a distributed scheduling algorithm and incorporating Length Detection scheme. Further, CSMA/SF employs an Anti-Starvation mechanism to solve the starvation problem of shortest-first protocol. CSMA/SF also optimizes channel utilization by reducing the probability of collisions. We have implemented CSMA/SF into USRP2 platform and also conducted comprehensive simulations. The experimental results show that CSMA/SF can reduce overall energy consumption by around 20%. CSMA/SF can improve channel utilization up to 40%.
Keywords :
access protocols; wireless sensor networks; CSMA-SF; CSMA/CA MAC protocol; WSN; antistarvation mechanism; battery power; carrier sense multiple access with shortest first; distributed scheduling algorithm; energy depletion; energy efficiency; length detection scheme; power consumption; wireless sensor networks; Mathematical model; Media Access Protocol; Multiaccess communication; Scheduling algorithms; Wireless communication; Wireless sensor networks; CSMA; Energy efficiency; MAC;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2014.020414.131457
Filename :
6733261
Link To Document :
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