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Title |
A Two Level TDMA Scheduling Protocol with Intra-cluster Coverage for Large Scale Wireless Sensor Network |
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Author |
Haigang Gong, Ming Liu |
| Citation |
Vol. 6 No. 2 pp. 77~84 |
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Abstract |
One of the key problem for Wireless Sensor Network (WSN) is the design of Medium Access Control(MAC) protocol, which medium access is the major consumer of sensor energy. TDMA-based MAC protocol is inherently collision free, and can rule out idle listening since nodes know when to transmit. Cluster-based TDMA protocol is more scalable than traditional TDMA protocol, but it introduces inter-cluster interference for which FDMA and CDMA are not good solutions due to their hardware complexity and high cost. In this paper, we present TLTS, a Two Lever TDMA Scheduling protocol, in which the first scheduling ensures that neighboring clusters collecting their member’s data during different frames in order to avoid inter-cluster interference and the second scheduling schedules members of cluster sending their data to their respectively cluster heads during different slots to avoid intra-cluster interference. Simulation results show that TLTS performs better than HEED when node density turns higher. TLTS is more practical than HEED which uses CDMA code to avoid inter-cluster interference for deploying large scale WSN. |
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Keywords |
wireless sensor networks, media access control, TDMA, energy efficiency, Intra-cluster coverage |
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