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Method for making devices and services based on mdns protocol discover each other in local area network

A local area network and equipment technology, applied in the field of communication, can solve the problem of high cost and achieve the effect of reducing cost

Active Publication Date: 2018-01-16
IGRS ENG LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is that when the existing solution solves the problem of mutual discovery between devices, the problem of high cost due to the increase of the protocol

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  • Method for making devices and services based on mdns protocol discover each other in local area network

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Embodiment Construction

[0019] The present invention provides a method for making devices and services based on the mDNS protocol discover each other in a local area network. When a device based on the mDNS protocol joins the local area network, it not only announces a message online to the multicast device at port 5353 of the multicast address, but also sends messages to it at the same time. The 5353 port of the broadcast device with the same IP address as the network segment broadcasts the online announcement message, which makes up for the deficiency of the mDNS protocol, so that the devices in the LAN that do not support or do not fully support the mDNS protocol can discover each other normally, and do not need the device to support other discovery protocols. , which solves the problem of high cost of existing solutions. The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] The embodiment of the present invention p...

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Abstract

The invention discloses a method for mutual discovery of devices and services based on the mDNS protocol in a local area network, including: the first device joins the local area network after startup, and obtains an IP address; monitors port 5353 and joins a multicast group; sends a detection command, when Rename when detecting a device with the same name in the LAN, otherwise build an online announcement message; multicast an online announcement message to port 5353 of the multicast address, and broadcast an online announcement message to port 5353 of the broadcast address; the second device adopts the same method Join the LAN, and multicast the online announcement message to port 5353 of the multicast address, and broadcast the online announcement message to port 5353 of the broadcast address; the first device or the second device sends a detection message, and unicasts after receiving the detection message from the other party Announce to complete the mutual discovery of devices. The invention enables the devices in the local area network that do not support or do not fully support the mDNS protocol to discover each other normally, without requiring the devices to support other discovery protocols, thereby reducing the cost.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a method for enabling devices and services based on the mDNS protocol to discover each other in a local area network. Background technique [0002] With the widespread application of mDNS (multicast DNS, multicast DNS) in Apple products (iphone, ipad, Mac, etc.), and more and more hardware and software manufacturers supporting the mDNS protocol in their devices, the mDNS protocol has basically become It has become an industry standard for mutual discovery of devices and services in a LAN. The most common use of mDNS is in a LAN. In a LAN, when a host communicates with other hosts, it needs to know the IP address of the other host. However, in general In the local area network using DHCP (Dynamic Host Configuration Protocol, Dynamic Host Configuration Protocol) to dynamically assign IP addresses, the IP address of each host is assigned by the DHCP server, so sometimes it is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L29/12H04L12/18
Inventor 渠富林
Owner IGRS ENG LAB
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