A link maintenance method and gateway in elevator internet of things

Abstract

The invention relates to the field of internet of things of an elevator, and discloses a link maintaining method and a gateway in the internet of things of the elevator. When no data are transmitted in a network for a long time, a connecting link without data interaction can be kept connected, long connection of the link in the network is maintained and the network is kept alive. The method includes the steps that registration packets are sent to a server; if feedback information, sent by the server, of the received registration packets is received, heartbeat packets are sent to the server periodically so that the link can be maintained, wherein the sending period is T1, and T1 is a number larger than 0; if data sent by the server are received or data sent by all nodes in a local area network are received within T1, the heartbeat packets are stopped to be sent. The method is used for link maintaining between access network equipment and the server in the internet of things of the elevator.

Description

technical field [0001] The invention relates to the field of the elevator Internet of Things, in particular to a link maintenance method and a gateway in the elevator Internet of Things. Background technique [0002] The existing elevator Internet of Things adopts a structure in which an elevator controller is connected to a node, and each node is connected to a set of network access equipment and a server through a repeater and a gateway, and communicates with the server, such as figure 1 shown. In the network, if there is no data interaction between the server and the network-connected device for a long time, the connection of the network-connected device on the server side will be actively disconnected by the network operator supported by the network-connected device. Network operators do not allow connections that have not communicated for a long time to hang on the network. At this time, if data needs to be transmitted between the network access device and the server,...

AI Technical Summary

Problems solved by technology

At this time, if data needs to be transmitted between the network access device and the server, the link needs to be re-established, which will cause delays in network transmission and reduce network transmission efficiency

In addition, if an intermediate node in the entire network fails, it is difficult for the server to know immediately

[0003] In addition, the disadvantages of this network structure are also obvious. The cost of networking is relatively high. Every time an elevator is added, an additional network access device is required. Because the network access device integrates collection and long-distance wireless transmission functions, the price is relatively expensive. Limits the scalability of the network

In addition, the operating data of each elevator is transmitted to the server through corresponding nodes and network-connected devices. If there are too many elevators, this communication method will increase the load on the server; in addition, since the operating data of each elevator is transmitted separately, The amount of data transmission from the node to the server is large, and the cost of network traffic will also increase accordingly

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