Distributed TDMA Scheduling for Energy-Efficiency and Low-Latency Wireless Sensor Networks

• Main Authors: Chun-Kuei Hsiung, 熊俊魁
• Other Authors: Wen-Shyang Hwang
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/44387524246397908409

碩士 === 國立高雄應用科技大學 === 電機工程系 === 98 === The key issue in medium access control (MAC) layer of Wireless sensor networks (WSN) is that transceiver control to save energy. The problems, avoiding collisions, idle listening and overhearing, is solved by Time Division Multiple Access (TDMA). The TDMA research is popular in centralized, clustering and distributed WSN. Distributed WSN appropriates the multi-hop wireless network. But it is hard to get the globe solution, because the TDMA scheduling uses local information from a node neighbor. EE-TDMA is saved transition energy on transceiver by the contiguous link scheduling (CLS). But number of timeslots is increased in scheduling result, and increasing the network latency. This paper provides a TDMA scheduling with energy-efficiency and low-latency on distributed WSN. We keep the characteristic of energy-efficiency like EE-TDMA. The order of scheduling on each nodes is decided by the four factors, the number of child (δ), network level (Θ), interference range (ρ) and node id (ID), in lookup table after network setup. Simulation tool is made by the Python 2.6 language. The simulation result shows the transition times still in the low bound (two transition times), like EE-TDMA. The total scheduled timeslots is more less then EE-TDMA in average, and network latency is improved too.