ZigBee network based multi-gateway transmission system

Abstract

The invention relates to a ZigBee network based multi-gateway transmission system, in particular toa multi-gateway transmission system of the single ZigBee network with same domain network markers. Reported data in the network are divided into multiple parts to transmit to a plurality of gateways, and the gateways perform data conversion between the sensor network and the Ethernet. The ZigBee network based multi-gateway transmission system mainly comprises a terminal node, a routing node, a gateway node and a PC (personal computer) server, wherein the terminal node is connected with a sensor and / or controlled equipment and used for reporting acquired sensor data to a father node, the routing node is used for selecting the optimum reported gateway and transferring data, the gateway node is used for completing data address and protocol conversion between the ZigBee network and the Ethernet, and the PC server is used for gathering data of the gateways to centralized process. The ZigBee network based multi-gateway transmission system can adjust the number of the gateways and can solve the problem of network time delay caused by massive data according to needs.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a ZigBee network-based multi-gateway transmission system, in particular to a single ZigBee network multi-gateway transmission system with the same personal area network identifier. Background technique [0002] ZigBee (transliterated as "Zigbee" in Chinese) is an emerging short-distance, low-speed wireless network technology, which has the advantages of low power consumption, low cost, low complexity, and flexible networking, and is gaining popularity in wireless sensor network applications. More and more attention. ZigBee protocol layers from bottom to top are physical layer (PHY), media access control (MAC) layer, network layer (NWK), application layer (APL), etc. Among them, MAC layer and PHY layer adopt IEEE 802.15.4 protocol standard , the upper layer protocol is defined and standardized by the ZigBee Alliance. ZigBee can work in three frequency bands of 868MH...

AI Technical Summary

Problems solved by technology

However, the single-gateway ZigBee network has the following disadvantages: First, in the case of large geographical span, special site layout or complex geographical environment, ZigBee network deployment needs to use a large number of relay nodes to ensure smooth communication within the network, which is likely to cause unnecessary waste ; Secondly, although ZigBee technology is mainly for low-speed data transmission, when the number of ZigBee network nodes is huge, and all reported data must pass through a unique gateway, the requirements for data processing capabilities of the gateway will be very high; third, ZigBee modules and data conversion Modules often communicate through the serial port, and the communication rate of the serial port is limited, so it is easy to cause network delay due to the large amount of data; finally, in the conventional ZigBee network, because the gateway is at the core, when the gateway node fails, it is easy to cause the entire network to be paralyzed

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