Research on Design and Implementation of ZigBee Gateway System Based on Internet of Things
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The development of networking technology have a significant impact on society and the economy of the whole country, the ZigBee network connects with the Internet, can be controlled to a ZigBee network device in every corner of the world, it is conducive to the further development of ZigBee technology. ZigBee gateway via the Internet and the media do, it makes the monitor different regions worldwide can share information, which greatly reduces the time and space away from the physical world. In this paper, the gateway to the needs of Internet of Things are analyzed, and based on CC2530 development kit, designed and implemented a prototype system Internet of Things ZigBee gateway, complete ZigBee network management, protocol conversion, data transmission and other functions, the various communication modules and connectivity gateways whole were tested, the results showed that the ZigBee gateway enables communication between network nodes and the Internet, has better practicability. Theoretical Introduction of ZigBee ZigBee protocol is a short-range, low-power, low data rate wireless communication protocol, physical layer is compatible with IEEE 802. 15. 4 protocol, IEEE 802. 15. 4 protocol defines the physical layer (Physical Layer, PHY) and MAC layer ((Medium Access layer, MAC) communication standard, wherein the physical layer specifications define the main band wireless communication is used, and a data communication symbol rate of the band, MAC layer defines a plurality of wireless signals shared access and other air channel. IEEE 802. 15.4 (ZigBee) to work in labor SM band defines two bands, 2. 4GHz band and 896 / 915MHz frequency bands. In the work IEEE 802. 15. 4 in total provides 27 channels: in 2. 4GHz band, a total of 16 channels, channel communication speed is 250kbps; in the 915MHz band, a total of 10 channels, channel communication speed is 40kbps; at 896MHz band, there is a channel, the channel communication rate of 20kbps. ZigBee network topology major star network and grid networks. Different network topologies correspond to different application areas in ZigBee wireless networks, different network topologies to configure network nodes have different requirements, the type of network node could be a coordinator, routers and end nodes, specific configuration need to profile decision . In the ZigBee network, according to the type of device can be ZigBee network equipment is divided into three types: coordinator, router and terminal node, the coordinator is responsible for the establishment of wireless networks, network topology information maintenance and network management functions; the router is responsible for network routing, network management functions requested; terminal node is generally not responsible for maintaining network information, only need to add a specific wireless network. The coordinator is a network set up by, at the beginning of the establishment of the network, first scan the radio frequency channel to see if there are the same types of networks exist, if not present, according to the characteristics of the network number and network channels to create a ZigBee wireless network; coordinator may be responsible for the network and to bind user-level communication mechanism. 4th International Conference on Electrical & Electronics Engineering and Computer Science (ICEEECS 2016) Copyright © 2016, the Authors. Published by Atlantis Press. This is an open access article under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/). Advances in Computer Science Research, volume 50
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