Study on Quality of Service for Signal of Smart Grid in IEEE 802.15.7 Home Area Networks

• Main Authors: Pin-Chun Lai, 賴品君
• Other Authors: Bih-Hwang Lee
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/57323227169893604602

碩士 === 國立臺灣科技大學 === 電機工程系 === 103 === In recent years, due to the issues of energy saving, the Smart Grid has become more and more important. It means to update the existing smart grid to produce and delivery electricity with appropriate method. Through this, we can reactive to various requirement of energy or electricity such as monitoring, security and control system with efficient to operation and reliable energy providing. AMI(Advanced Metering Infrastructure) is the basic of smart grid, however, AMI’s network initialization usually cost lots of time delay and energy waste because of many collisions due to the initialization in the high node density and variable network. We can utilize the Visible Light Communication (VLC) to solve the related issue in smart grid. With the growing popularity of LED development, VLC becoming an achievable technique. In the communication protocol, IEEE 802.15.7 standard defines the physical layer of visible light communication and media access control sublayer operation, making the smart grid protocol specification been well defined. In the smart grid Home Area Network(HAN), smart devices would transmit messages between each other to exchange appliances energy status. In order to make these security and control signals can reach the destination in time, the most important requirement is the various types of signal delay that can be tolerated. If the signal cannot reach the destination in time, it could cause property damage and personnel casualties. In the IEEE 802.15.7 standard does not defined the Quality of Service(QoS) application about smart grid. To solve the above mentioned problems, this thesis proposes the SATHS (Superframe adjustment transmission mechanism for HAN Smart gird) mechanism. SATHS uses different transmit methods to adapt different priorities to achieve specification and improve transmission efficiency of high priority signals. To ensure the proposed mechanism achieve the requirement of QoS, we use throughput, goodput, average frame drop ratio and average delay per frame to evaluate the system efficiency. The simulation results show the proposed mechanism can not only classify the signal in HAN in accordance with the standard of U.S. Department of Energy but also satisfy the delay time in system.