| Summary: | 碩士 === 國立雲林科技大學 === 電機工程系 === 102 === Wireless sensing/mesh networks (WSN/WMN) has reliability high, and cost low, and strong extended and channel using rate high features, Wireless Sensor/Mesh Networks (WSN/WMN) have high reliability, low cost, scalability and channel usage characteristics, such that scholars great importance to the internet technology more and more, it involves applications and that growing popularity; because virtual backbone network brings together most of the traffic volume on the Internet, So the cluster head (CH) on the backbone network and bridge node, compared to more non-backbone network of sense node, is bound to consumption more of power. If not for a planned replacement will cause these nodes life cut short, and even affect the performance of wireless sensor network and life cycle. Time Division Multiple Access (TDMA) is first cut into several smaller frequency band (this action is not necessary, depending on the system), and then cut into same length time slots on each frequency band, number of time slots and then combined into a Frame, the first number of time slots in each frame consisting of a first number TDMA channel, and the rest, and so on, each channel for a user, so different users will signal not overlap. In order to reduce competition-style agreements require additional packet transmission power consumption and competition collide and power consumption issues must be retransmitted, agreement scheduling-style arrangements sense node to separate the transmission time to improve these problems. Scheduling-style access control generally use TDMA allocation transmission time method, first, the time is divided into a number of time slot or a different time zone, and assigned to need to be transmitted and received by a node on the internet, and the node is not assigned to either send or receive does not belong to the current node slots, you can go to sleep to save power, therefore, how to arrange a time zone to the sensor nodes on the network, the agreement is an important scheduling-style design on the subject. In this paper, will use a simple WCDS algorithm for Two-Hop Algorithm to distribute the cluster head (CH), then plan the two backbone infrastructure to analyze time slot and Timer with TDMA, find a better network backbone architecture, extending wireless sensor networks / wireless mesh network life.
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