The Improvement of CSMA/CA Based on Dynamic Weighting Algorithm

DOI

10.2991/asei-15.2015.243How to use a DOI?

Keywords

Wireless sensor network (WSN); IEEE802.15.4; CSMA/CA; Dynamic weighting algorithm; Heavy load.

Abstract

IEEE802.15.4 defines MAC and PHY specification for low-rate wireless personal area networks (LR-WPANS), which targets wireless networking among low-rate, low-power and low-cost devices for short range telecommunication. As the wireless sensor network (WSN) used in ward monitoring system need to handle large amounts of data, this paper proposes an improved back-off algorithm in slotted CSMA/CA by introducing a weighting algorithm of NB. By NS2 simulation, when the traffic load is large, compared with IEEE 802.15.4, the delay time, packet loss rate and Jitter of the improved dynamic algorithm can be significantly reduced, and the throughput of the improved dynamic algorithm can be significantly increased. In this paper, the improved CSMA/CA algorithm can dynamically change as the changes of the traffic load, and take different back-off measure to suit the situation. Besides, the improved CSMA/CA algorithm not only keep the superiority of the standard CSMA/CA algorithm in small traffic load, but also can achieve reliable transmission of data in real time under heavy load conditions.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yuexing Gu
PY  - 2015/05
DA  - 2015/05
TI  - The Improvement of CSMA/CA Based on Dynamic Weighting Algorithm
BT  - Proceedings of the 2015 International conference on Applied Science and Engineering Innovation
PB  - Atlantis Press
SP  - 1238
EP  - 1246
SN  - 2352-5401
UR  - https://doi.org/10.2991/asei-15.2015.243
DO  - 10.2991/asei-15.2015.243
ID  - Gu2015/05
ER  -