标题: | 无线感测网路下用以支援多种型态流量之TDMA-over-CSMA链结层协定 A TDMA-over-CSMA Link Layer Protocol for Supporting Multi-type Traffics in a Wireless Sensor Network |
作者: | 李亭莹 Ting-Ying Li 曾煜棋 黄俊龙 Yu-Chee Tseng Jiun-Long Huang 网路工程研究所 |
关键字: | 资料汇集;链结协定;媒介存取控制;排班;TDMA;无线感测网路;convergecast;link protocol;MAC;scheduling;TDMA;wireless sensor network |
公开日期: | 2007 |
摘要: | 无线感测网路中存在着多种不同类型的流量,因此设计一个满足各种流量需求的媒介存取控制协定是个具有挑战性的议题。例如:紧急事件的回报在资讯传递的时间上较为紧要,而规律型的回报则是在感测节点上的省电考量较重要。在本论文中,我们提出了一个TDMA-over-CSMA的链结层协定,可支援无线感测网路中的资料汇集、紧急事件回报及需求型的流量。我们的主要目标有:使多数的流量可达到较低的传输延迟、对于汇集型的流量可达到资料聚集及省电的功效、及降低同一紧急事件区域中同时侦测到资讯之节点的资料冗余度。另外,我们也提出了一个重复利用时槽的方法以支援需求型的流量。模拟结果呈现出我们的协定具有较佳的或可抗衡现有协定的表现,而这些现有协定可做为处理单一类型流量的代表。我们也在Jennic—以ZigBee协定为基础的平台上完成实作的部分。 Traffics in wireless sensor networks are typically of multiple types. To design a suitable medium access control (MAC) protocol to satisfy the requirements of all traffic types is a challenging issue. For example, reports of emergency events are more time-critical, while regular reports could be more energy-critical. In this paper, we present a TDMA-over-CSMA link protocol for supporting convergecast, event-reporting, and on-demand traffics in a wireless sensor network. The main goals are to achieve low transmission latency for most types of traffics, to facilitate data aggregation and energy efficiency for convergecast traffics, and to reduce data redundancy in an event area when multiple nodes detect the same event at the same time. In addition, an opportunistic slot reuse scheme is proposed to exploit spatial reuse and to support on-demand traffics. Simulation results show that our protocol performs better than or comparable to existing protocols, which can typically take care of only one type of traffics. Implementation work has also been done on Jennic, a ZigBee-based platform. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT009556519 http://hdl.handle.net/11536/39615 |
显示于类别: | Thesis |
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