1、中文 7900 字 英文文献： The application prospects of wireless communication technology in the grid communication Technical Analysis of the thesis Keywords wireless； grid communication； Abstract With the rapid development of modern science and technology to build the perfect strong and reliable communication
2、s network, has become increasingly important. The articles combine the characteristics and needs of the electric power communications and wireless features of the new technology, analyze the application prospects of wireless communication technology in the power grid communications. First, an overvi
3、ew Electric power communication network is run in order to ensure the security and stability of power system came into being. With the power system security and stability control systems, dispatching automation system is collectively known as the power system security and stability of the three pill
4、ars. Chinas electric power communication network through the construction of several decades of ups and downs, has begun to take shape, build and become interchange communication network via satellite, microwave, carrier, cable and other means of communication. With the development of wireless commu
5、nication technology, wireless communication system characteristics change dramatically. In recognition of the wireless communication network is not dependent on the grid grid, and strong resistance to natural disasters, but also has large bandwidth and transmission distance, non-line-of-sight transm
6、ission, etc., is very suitable to make up for the communication of single coverage incomplete surface defects . This paper briefly describes the application characteristics, advantages and disadvantages of wireless communications transmission system, and analyze the prospects of its application in p
7、ower system. Complete network transmission system based on the future development trend of the sensor network towards the network to further improve the technology - the application of the sensor network technology and network support. Promote the application of sensor networks from the perspective
8、of the manufacturing of sensor node hardware platform, network application technology development to real-world applications into； network support techniques include positioning technologies, synchronization technology, security technology, within the network information processing technology, to ne
9、twork performance enhance the main objective to improve overall network quality of service and intelligent. Within the network, information processing technology is designed packaging further integration of the original data collection, information processing and computing migrate to within the sens
10、or network, which simplifies the equipment requirements on the client, the user side can be perceived to use more low-end and simple equipment read and apply information. Network information processing technology allows the sensor network has a more advanced, better information processing capabiliti
11、es, available to the users perception of the information will be easier to understand. Second, the wireless technology introduced (A) the concept of wireless communication technology Currently, wireless communications and its applications has become one of the most active areas of research in the in
12、formation science and technology today. The general by the wireless base stations, wireless terminal and application server. (B) the development status of wireless communication technology Wireless communications technology in accordance with the transmission distance can be roughly divided into the
13、 following four technology based on IEEE802.15 wireless personal area network (WPAN), wireless metropolitan area network based on IEEE802.11 wireless local area network (WLAN) based on the IEEE802.16 ( WMAN) and IEEE802.20-based wireless WAN (WWAN). Overall, the representatives of the long-distance
14、wireless access technologies: GSM, GPRS, 3G； on behalf of the short-range wireless access technologies, including: WLAN, UWB. Can be divided in accordance with the mobility of mobile access and fixed access. Fixed wireless access technology: 3.5GHz wireless access (MMDS), Local Multipoint Distributi
15、on Service (LMDS), 802.16d； mobile wireless access technologies including: 802.15 of WPANs, 802.11 WLAN, 802.16 e WiMAX, 802.20 WWAN. In accordance with the bandwidth can be divided into narrow-band wireless access and broadband wireless access. Representatives of which broadband wireless access tec
16、hnologies 3G, LMDS, WiMAX； narrow-band wireless access technology on behalf of first-and second-generation cellular mobile communication system. A major wireless communications technology From technology trends can be seen as the core of the OFDM + MIMO wireless communications technology will become
17、 the mainstream of the development direction of future wireless communications. The current wireless communications technology based on this technology are: four kinds of B3G, WiMAX, WiFi, of WMN and other technologies. Other wireless communications technology In addition to the mainstream wireless
18、communications technology, wireless communication technology also includes: IrDA, Bluetooth, the RFID, UWB, cluster communications, and other short-range communications technology and on LMDS, MMDS, and point-to-point microwave, satellite communications, long distance communication technology. (1) t
19、he IrDA: Infrared Data Association, is a point-to-point data transfer protocol, the communication distance is generally between 0 1m, the fastest transfer rates up to 16Mbps, the communication medium for the near-infrared wavelengths around 900 nm. (2) Bluetooth: Bluetooth in the global open 2.4GHzI
20、SM band using frequency hopping spread spectrum technology, the communication medium of electromagnetic waves from 2.402GHz to 2.480GHz. (3) of RFID: Radio Frequency Identification, ie, radio frequency identification, commonly known as labels. It is a non-contact automatic identification technology,
21、 automatic target recognition by the RF signal and access to relevant data. RFID tags, Interpretation of three basic elements, and antenna. (4) the UWB: Ultra Wideband, Ultra-Wideband technology. UWB communication is also known as carrier-free baseband communications, and is almost fully digital com
22、munications systems, RF and microwave devices need very little, so you can reduce the complexity of the system, reducing The merits of wireless technology (A) WLAN technology Wi-Fi technologies and products are already quite mature, and mass production. The technology for the wireless LAN as an exte
23、nsion of wired networks, broadband applications for the particular location, even though the Wi-Fi technology is widely used, but it is still in the security there is a certain security risk, the Wi-Fi uses a radio frequency (RF ) through the air to send and receive data. Since wireless networks use
24、 radio waves to transmit data signals, are very vulnerable to attacks from outside hackers can easily steal data within the coverage of the waves and even into the unprotected internal LAN. (B) analysis of WiMax WiMax is a state-of-the-art technology, the introduction of relatively late, there are s
25、mall frequency reuse, the use of the problem of low, but only recently standardized, large-scale promotion of the technology also need to practice the test. From the application prospects of the technology can meet online in a wide range of requirements, coverage can include outdoor and indoor, can
26、be a large area of coverage, or even a small number of base stations can be achieved throughout the city coverage. WiMax due to its advanced technology and ultra-long transmission distance, has been the industry optimistic about the future direction of development of mobile technologies, and provide
27、s excellent last mile Internet access services. (C) of WMN technology WMN is being studied in the technology, combined with the characteristics of the various technologies continue to study different aspects of integration and not a mature product line to support large-scale application of this tech
28、nology. The application prospects of WMN in this emerging network not only has a broad application space for wireless broadband access in other areas such as the combination of data, the image acquisition module can monitor or data acquisition of the target object, and is widely applied to detect an
29、d other fields. With the other technology is constantly updated sound of WMN better with integration of complementary, so as to be able to exceed and play their respective advantages. (D) 3G technical analysis 3G 1996 standards, 2000 to complete the upper-layer protocols, including the complete form
30、ulation of standards. 3G network deployment with considerable practical experience, theory of a complete sets of building a network, including network link budget, the model budget and simulation. From the commercial prospects of 3G in some areas has been a large-scale commercial applications, such as many European countries, Japan, Korea and so on have been building a 3G network.
