Zigbee wireless sensor network of master and slave tree types, construction method and routing protocol

Abstract

The invention discloses a Zigbee wireless sensor network of master and slave tree types, a construction method and a routing protocol. The method comprises the following steps of: dividing a whole network into a master network and a plurality of salve networks; forming the master network by using a master coordinator and related nodes; and constructing the plurality of salve networks by using peripheral isolated nodes and a plurality of routers in the master network serving as slave coordinators so as to construct the network with a master and slave tree type structure. The traditional tree type routing protocol is improved so that the routing protocol can be applied to the network of the master and slave tree types. The method has the advantages of enlarging the scale of the traditional tree type network, facilitating elimination of the isolated node number in the network, facilitating reduction of overhead of energy and memory of the routers caused by constructing a routing table and improving the survival time of the network by adopting the improved tree type routing protocol, and ensuring the compatibility with the primary protocol without any modification on the frame structure of the primary Zigbee protocol.

Description

technical field [0001] The invention relates to wireless sensor network technology, in particular to a Zigbee wireless sensor network. Background technique [0002] With the continuous development of semiconductor technology and wireless communication technology, a variety of new short-distance wireless communication standards have emerged, laying a technical foundation for the development of wireless sensor networks. As one of the standards, Zigbee has been supported by many well-known international companies and associations since its publication date due to its moderate transmission distance and simple protocol content, and has become the most valuable and promising in wireless sensor networks. standard. Freescale, Chipcon, Atmel and other companies have launched chips and products that support the Zigbee standard. Nowadays, no matter in the field of control, computer or wireless communication, the development, research and application of Zigbee technology have all paid...

AI Technical Summary

Problems solved by technology

[0010] However, adopting a hierarchical address allocation scheme limits the scale of the network on the one hand and hinders the application scope of the Zigbee wireless sensor network;

[0011] In order to expand the scale of the Zigbee network, some scholars have proposed to connect multiple Zigbee sensor networks through a gateway, and each sensor network uses a communication channel. Since Zigbee supports a total of 16 channels in the 2.4GHz frequency band, the entire The scale of the network is expanded by 16 times, but the structure is relatively loose and it is difficult to carry out unified management

In order to eliminate the number of isolated points, scholars at home and abroad have proposed schemes based on address borrowing, but this requires the router to be always active and cannot save its own energy. On the other hand, such schemes are not conducive to expanding the network scale

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