Power line and wireless dual-network routing method

Abstract

The invention relates to a dual-network routing method. The method comprises the following steps: nodes are initialized to establish routing registry connection and generate a routing list; a first communication link is adopted for transmitting data, and the first communication link is preferentially switched to a second communication link to continue to transmit data in the case of communication link interrupt. The first communication link is a wireless communication link, the second communication link is a power line communication link, and vice versa. The method has the advantages that higher communication reliability and carrier class reliability are realized, communication real-time property is guaranteed, and the technical problem of signal island in the prior art is solved.

Description

technical field [0001] The invention relates to a dual-network routing method. Background technique [0002] In the power industry, AMR (Automatic Meter Reading System) has been developed for more than 20 years. As long as it is used to realize remote meter reading for electricity users, generally, meter reading and billing are performed once a month. [0003] AMI (Advanced Metering System) is the basis for the development of smart grid and the first step in the development of smart grid. It includes all the functions of the AMR system, such as remote meter reading, and on this basis, it can reduce the energy consumption of life and production, and save energy. emission reduction. In addition, it also includes more new content, such as real-time collection of electricity consumption information of various users on demand, implementation of real-time electricity prices, support for distributed power sources, power outage detection, support for smart homes, remote control of ...

AI Technical Summary

Problems solved by technology

Through real-time monitoring of message transmission, the signal to be carried, and the signal-to-noise ratio of the communication link, and then calculate the routing of the power line communication network through mathematical modeling, this technology has a large amount of calculation. , making its practical application effect unsatisfactory

[0011] (4) Dynamic networking technology. Each communication node exchanges routing protocol messages with each other, dynamically calculates the network topology, and achieves the purpose of relay reselection. This scheme has strong network adaptability and can achieve the purpose of selecting the optimal path , but it follows that the cost of each communication node increases accordingly, and the routing calculation needs to send the message multiple times and perform iterative calculation, which takes a long time.

[0012] To sum up, the power line itself is not designed for communication purposes. Factors such as large attenuation, strong noise, low speed, and impedance mismatch have led to the development of power line communication for decades. It is still an unreliable communication technology.

In the communication network based on power line communication technology, because the communication link cannot be guaranteed to be smooth at all times, the existing power line communication technology cannot guarantee 100% normal communication between all communication nodes at any time.

[0013] In order to restore the communication ability of communication nodes, the existing routing technology uses the method of repeatedly looking for new relay nodes. The main problem is that it cannot find a suitable relay. For example, if nodes on other branches or different If the communication node of the phase is used as a relay, the delay will be too long; in addition, there is also the problem that too many routes need to be passed through multiple communication nodes as relays. Statistics show that in one communication, at least 2 ~3 relays, more than 6~8 relays are needed, which cannot guarantee the real-time communication

[0014] In addition, due to the noise and electromagnetic interference of the whole frequency band, as well as the change of impedance, the quality of the communication channel changes in real time, and nodes (information islands) that cannot be reached by communication signals appear. The existing routing technology cannot solve this "information island" question

[0015] It can be seen that there is still a big gap between the existing power communication technology and the AMR system's 24-hour 100% meter reading success rate, and it cannot meet the higher communication reliability and real-time requirements of AMI.

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