A kind of application layer multicast method of lpwan internet of things

Abstract

The invention discloses an application layer multicast method of LPWAN Internet of Things, including the establishment of network layer broadcast group, the establishment of application layer multicast group and the sending of multicast message; through the above three parts, the present invention can be used without Multicast control can be realized under the condition of greatly increasing system overhead, which greatly simplifies the realization of multi-terminal synchronization control.

Description

technical field [0001] The invention belongs to the technical field of Internet of Things, and in particular relates to an application layer multicast method of LPWAN (Low Power Wide Area Network, Low Power Wide Area Network) Internet of Things. Background technique [0002] In the field of low-power IoT, some applications require a batch of terminals to be controlled at the same time, such as turning on or off the street lights of a road at the same time, and turning on and off the air conditioner of a building at the same time. For this application scenario, multiple terminals need to be controlled synchronously. [0003] At present, there are mainly the following methods: [0004] Method 1: Set up a controller for multiple terminals that need to be controlled synchronously; [0005] The advantage of this method is that it is simple and can realize synchronous control of multiple terminals; but it has the following disadvantages: [0006] 1. The project is complicated, ...

AI Technical Summary

Problems solved by technology

[0006] 1. The project is complicated, and multiple terminals must be connected to one controller, which is equivalent to a cascading connection with many connections;

[0007] 2. It is impossible to report the status or information of a single terminal, and it is also impossible to perform flexible control of a single terminal;

[0008] 3. The reliability is poor. Once the controller fails, it will affect the control of a large number of terminals

[0018] 2. The network server needs to maintain multiple network layer multicast contexts, including multicast address allocation, security context establishment, multicast routing establishment and maintenance, multicast group release and other processes. The protocol process is complex and the system overhead is large

[0019] 3. When a terminal participates in multiple network layer multicast groups, a context must be established for each multicast group, which is expensive

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