Method and system for processing lost nodes based on zigbee protocol

Abstract

The invention discloses a ZigBee protocol-based method and a system for processing a lost node. The method comprises that when the fact a loss indication message is received by a ZigBee device object of an application layer is detected, the loss indication message is reported to an application object through a specified first message interface in an application framework; when the lost node is an original parent node of a node, network scanning is triggered to determine a corresponding potential parent node of the node; a network join request is sent to the potential parent node through the ZigBee device object, so that a network is accessed again through the potential parent node; and when the lost node is an original child node of the node, the ZigBee device object is triggered to send a request for canceling the original child node to a network layer, so that information of the original child node is cancelled in the network layer. By the aid of the method, the lost node can be processed timely, network interruption time is shortened, and the stability and the adaptability of the network are improved.

Description

technical field [0001] The invention relates to the technical field of short-distance wireless communication, and more specifically relates to a method and system for processing lost nodes based on the ZigBee protocol. Background technique [0002] ZigBee is an emerging wireless communication technology with the characteristics of short distance, low speed, low power consumption, high reliability, and two-way transmission. A network based on the ZigBee protocol can coordinate with each other to achieve communication among thousands of nodes. The nodes in the network can transmit data from one node to another through radio waves in a relay manner with only a small amount of energy. Communication Very efficient. [0003] When a node in the ZigBee protocol network loses power, errors, leaves or the signal becomes weak and cannot be detected by other nodes, it is called node loss. If a certain node in the ZigBee protocol network is lost, the node and its child nodes will not b...

AI Technical Summary

Problems solved by technology

Therefore, when a child node or parent node with a communication relationship with a node is lost in a network based on the ZigBee protocol, if the node cannot handle the loss of a node with a communication relationship with it in time, the communication may be interrupted. Even the entire network is paralyzed

For example, taking node A in the ZigBee network as an example, if the parent node A1 of node A is lost, the node A and its child nodes will not be able to receive any information, and if the parent node A1 cannot obtain the information of its child node A in time Losing information and processing the lost node A will also affect the communication of the parent node A1, and if the parent node A1 continuously sends data to the node A, it will cause a lot of waste of communication data

[0004] However, the high layer of the protocol stack (i.e. the application object in the application layer) of the nodes in the existing ZigBee protocol-based network cannot timely obtain the loss of other nodes that have a communication relationship with it, and cannot process the lost node in time, and the existing There is no relatively complete method for dealing with lost nodes in the technology. When a lost node is detected in the network, the self-organization of the network and the dynamic adjustment of the network cannot be realized, so that the stability of the network cannot be guaranteed. For example, in the prior art, when After the original parent node of this node is lost, the processing of this situation is limited to the reconnection between this node and the original parent node, but if the reconnection between this node and the original parent node fails, the current node will not be able to reconnect Join its original network

Therefore, when a node in the ZigBee network is lost, abnormal communication or even network paralysis may occur in the network

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