Partition-Based GTS Adjustment for Wireless Sensor Networks
The personal area network (PAN) coordinator can assign a guaranteedÂ time slot (GTS) to allocate a particular duration for requested devices in IEEEÂ 802.15.4 beacon-enabled mode. The main challenge in the GTS mechanism isÂ how to let the PAN coordinator allocate time slot duration for the devices whichÂ request a GTS. If the allocated devices use the GTS partially or the traffic patternÂ is not suitable, wasted bandwidth will increase, which degrades the performanceÂ of the network. In order to overcome the abovementioned problem, this paperÂ proposes the Partitioned GTS Allocation Scheme (PEGAS) for IEEE 802.15.4Â networks. PEGAS aims to decide the precise moment for the starting time, theÂ end, and the length of the GTS allocation for requested devices taking intoÂ account the values of the superframe order, superframe duration, data packetÂ length, and arrival data packet rate. Our simulation results showed that theÂ proposed mechanism outperforms the IEEE 802.15.4 standard in terms of theÂ total number of transmitted packets, throughput, energy efficiency, latency,Â bandwidth utilization, and contention access period (CAP) length ratio.
IEEE 802.15.4, Part 15.4: Wireless Medium Access Control (MAC) and Physical Layer (PHY) Specifications for Low-Rate Wireless Personal Area Networks (WPANs), IEEE Standard for Information Technology, September 2006.
Huang, Y.-K., Pang, A.-C. & Hung, H-N, An Adaptive GTS Allocation Scheme for IEEE 802.15.4, IEEE Transactions on Parallel and Distributed Systems, 19(5), pp. 641-651, 2008.
Cho, H.W., Bae, S.J. & Chung, M.Y., Utilization-aware Dynamic GTS Allocation Scheme in IEEE 802.15.4, 16th Asia-Pacific Conference on Communications (APCC), pp. 210-214, 2010.
Shrestha, B., Hossain, E., Camorlinga, S., Krishnamoorthy, R. & Niyato, D., An Optimization-Based GTS Allocation Scheme for IEEE 802.15.4 MAC with Application to Wireless Body-Area Sensor Networks, IEEE International Conference on Communications (ICC), pp .1-6, 23-27 May, 2010.
Cheng, L., Bourgeois, A.G. & Zhang, X., A New GTS Allocation Scheme for IEEE 802.15.4 Networks with Improved Bandwidth Utilization, International Symposium on Communications and Information Technologies (ISCIT), pp.1143-1148, 2007.
Hong, Y-G., Kim, H-J., Park, H-D. & Kim, D-H., Adaptive GTS Allocation Scheme to Support Qos And Multiple Devices In 802.15.4, 11th International Conference on Advanced Communication Technology (ICACT ), 03, pp. 1697-1702, 2009.
Seo Y.S., Kim, D.Y. & Cho, J, A Dynamic CFP Allocation and Opportunity Contention-Based WBAN MAC Protocol, IEICE Trans. Commun., E93-B(4), 2010.
Ding, Y. & Hong, S., CFP Scheduling for Real-Time Service and Energy Efficiency in The Industrial Applications of IEEE 802.15.4, IEEE Journal of Communications and Networks, 15(1), pp. 87-101, 2013.
Chen, C., Wei, X., Jin, Y. & Ge, S., A Delay Sensitive Time Slots Scheduling in Vehicular Sensor Networks, 5th International Conference on Intelligent Networking and Collaborative Systems (INCoS), pp. 448-455, 2013.
Chen, C., Pei, Q. & Li, X., A GTS Allocation Scheme to Improve Multiple-Access Performance in Vehicular Sensor Networks, IEEE Transactions on Vehicular Technology, PP(99), 2015.
Shah, S.K., Rane, S.J. & Vishwakarma, D.D., GTS Allocation Strategy for IEEE 802.15.4 WSN, International Conference on IT Convergence and Security (ICITCS), pp. 1-5, 2014.
Al Rasyid, M.U.H., Lee, B-H. & Sudarsono, A., PEGAS: Partitioned GTS allocation scheme for IEEE 802.15.4 networks, International Conference on Computer, Control, Informatics and Its Applications (IC3INA), pp. 29-32, 2013.
Castalia, a Simulator for WSNs. Available: http://castalia.npc.nicta. com.au/ (4 September 2014).