A device search and communication method across network segments

Abstract

The present invention provides a device search method across network segments, which includes the following steps: defining a data packet structure; the search end sends a detection data packet to the device end; when the device end receives the detection data packet, it sends a detection data packet to the search end The broadcast packet of the data link layer defines this packet as an information packet; the search end identifies the information packet, matches the packet identification information, packet type, etc., and records the MAC address of the device. The method of the invention supports the discovery of cross-network segment devices; at the same time, it supports cross-network segment communication, even if the IP address conflicts, communication can also be carried out; the information can be customized, and complete information is attached when searching for devices.

Description

technical field [0001] The invention relates to a device search and communication method across network segments. Background technique [0002] With the rapid development of IP networks, it is becoming more and more common to use IP networks to build monitoring systems. For example, in a security monitoring system, each monitoring device may be in a different network segment. In this case, it is extremely important for users to be able to automatically and quickly search and discover various monitoring devices, pay attention to the online information and IP information of the devices in real time, and communicate effectively with the devices. [0003] In the prior art, there are UPnP (Universal Plug and Play, Universal Plug and Play) search devices. UPnP is a set designed to enable various devices in the home network and the company network to be seamlessly connected to each other, and to simplify related networks. Implemented protocol framework. The UPnP protocol framewo...

AI Technical Summary

Problems solved by technology

However, the UPnP method cannot realize the search of devices across network segments, and when the IP addresses conflict, the devices cannot be accurately discovered

[0004] In addition to UPnP, in the prior art, WS-Discovery of ONVIF is also used for device discovery, which sends SOAP broadcast packets, the broadcast address is 239.255.255.255, and the port is 3702, but this method cannot realize cross-network segment communication

[0005] In the prior art, there are also some broadcast methods other than the above methods for device discovery, but generally the information provided after the device is found is not very complete, and information communication after IP address conflicts cannot be carried out

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