Method for time synchronization between nodes in self-organizing network

Abstract

The invention provides a method for time synchronization between nodes in a self-organizing network. All nodes have unique priority numbers. The method comprises: step 1, any node A in the network monitors synchronous time marks sent by other nodes during the silence period; and if one synchronous time mark is received, the step 2 is carried out; otherwise, the step 3 is carried out after the end of the silence period; step 2, if the priority of the priority number of the source node of the received synchronous time mark is superior to the priority number of the local node, the node A adjusts local time according to the received synchronous time mark and the step 3 is carried out; and otherwise, the step 3 is carried out directly; and step 3, the node A selects a time point to send a synchronous time mark to other nodes, wherein the synchronous time mark carries the node local time information as well as the node priority number. With the method, time synchronization of all nodes can be realized without the unified coordination of a central control node, thereby improving the efficiency of the time synchronization between the nodes and guaranteeing the user priority experience.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for time synchronization between nodes in an ad hoc network. Background technique [0002] Wireless ad-hoc network is a special wireless mobile communication network. There is no central control node in the network, and all nodes are equal in status and distributed. Each node not only has the communication function of ordinary mobile terminals, but also has the function of message forwarding. Function, when the source node and target node of the communication are not in the direct communication range, the message can be forwarded through the intermediate node for communication. In this network, if multiple nodes have communication needs at the same time, due to the lack of coordination of the central control point, two or more nodes may send data at the same time at the same time, thus sending conflicts. To resolve this conflict, the node can send a detection signa...

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Problems solved by technology

[0003] However, the inventor found that when the wireless network is initialized (the nodes in the network are uniformly turned on and connected to the network), the equipment of the node is restarted due to crash or power failure, or the local area wireless ad hoc network with two inconsistent time bases is caused by the movement of nodes in their respective networks. When meeting and merging, because there is no central control node in the wireless ad hoc network for unified coordination, the time between each node may be asynchronous

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