Wireless self-organizing network management method based on time synchronization and frequency synchronization

Abstract

The invention relates to the technical field of wireless self-organizing networks, in particular to a wireless self-organizing network management method based on time synchronization and frequency synchronization, which comprises the following steps: firstly, forming a tree topology structure, and then, enabling a root node to send out a first time slot, namely a multicast sending time slot at a frequency F1; enabling the node directly associated to the root node to enter a multicast receiving time slot at the frequency F1 to receive the root node information; and after the multicast time slot is finished, enabling the root node to enter the unicast time slot. In the nodes directly associated with the root node, if the nodes are terminal nodes, entering the unicast time slot; and if the frequency F2 is the father node, namely the routing node, forwarding to the frequency F2, entering a multicast sending time slot, and sending multicast information; and finally, executing a synchronization process by each layer of nodes in the tree topology structure until the node farthest from the root node finishes the unicast time slot, and finishing one cycle. Conflicts with nearby nodes are avoided in three time slots in a frequency hopping communication mode, and the success rate of communication is improved.

Description

technical field [0001] The invention relates to the technical field of wireless ad hoc networks, in particular to a wireless ad hoc network management method based on time synchronization and frequency synchronization, which can control and manage the communication process between nodes. Background technique [0002] Applications based on wireless ad hoc networks are becoming more and more widespread, such as smart home applications, smart agriculture, environmental monitoring, intelligent lighting control, etc. It is important to use wireless ad hoc networks to make each terminal device in a monitorable and controllable state. one of the purposes. Taking smart home as an example, a family may have dozens or more devices that need to be controlled, such as refrigerators, washing machines, heating valves, lamps, curtains, water heaters and so on. In order to allow a set of algorithms or strategies suitable for smart homes to automatically complete various adjustment tasks, i...

AI Technical Summary

Problems solved by technology

However, when more and more devices are connected to the smart home environment, there are two issues to consider. One is that the more devices, the more complicated the cable connection

The second is that the equipment may be in any position, and the overly long cable may cause the signal to attenuate below the effective range, or sometimes the wiring cannot be laid due to the structural problems of the building

This problem is relatively simple in a wired network, because devices are connected by cables, and a device sends data on a certain port, which must be received by the device connected to the other end of the port.

In a wireless network, it is difficult for the node sending the broadcast to fully grasp the information of all nearby neighbors, and because the broadcast / multicast communication usually does not require the receiver to send a receipt to confirm receipt, the sender cannot confirm whether the message was successfully sent

[0008] 4. Another problem in using broadcast / multicast in wireless ad hoc networks is the determination of forwarding nodes

However, if the coverage of the nodes participating in the forwarding is not enough to reach the entire network, the forwarding will become invalid or partially invalid

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