Method for measuring displacement speed of motion body in multi-hop network

Abstract

The method for measuring the displacing speed for mobile in a multi-hop network comprises three processes: 1, sensing the area node and aggregating node (Sink) to build the least hopping route table; 2, building the scheduling strategy comprising the initial scheduling table, the source scheduling table and the transferring scheduling table; the core of the strategy is that the source node automatically changes the vacant ratio of the nodes of the transferring path according to the hip number of the distance from the Sink; 3, the source node uses the source table to transmit the data; the transferring node transfers the transferring table according to the obtained information of the scheduling table and transfers the data; the initial scheduling table is used for maintaining the network synchronization and the coordination of the source scheduling table and the transferring table. The Sink can calculate the moving speed of an object according to the distance between the two nodes and the time interval of the received data.

Description

technical field [0001] The invention is applied to measure the moving speed of a moving object approaching a certain target node in a multi-hop network, and belongs to the technical field of wireless communication networks. Background technique [0002] Multi-hop network (such as self-organizing network, wireless sensor network) is a new type of network technology that has been developed rapidly and widely used in recent years. It can organically integrate wireless communication technology and network technology. , Such as battlefield, environment and natural disaster monitoring, monitoring of harmful and toxic work sites, etc. have unique advantages. The application scenario involved in the present invention is to form a specific network form (such as a wireless sensor network) based on the relevant protocols of the multi-hop network, to automatically detect the moving speed of the moving object approaching (or leaving) a certain target node and pass the sink node (Sink ) ...

AI Technical Summary

Problems solved by technology

The single-hop method is to directly send the data to be transmitted (such as the data collected by the sensor) to the base station (BS, Base Station) or Sink. The advantage is that the real-time performance of data transmission is good, but for nodes far away from the Sink, The energy consumption of the single-hop method is very large, and the nodes in the multi-hop network are generally unable or inconvenient to replenish energy. Therefore, the use of the single-hop method will shorten the lifetime of the network; the use of the multi-hop method is relatively Energy saving, but there is a large delay in data transmission, and this delay will increase with the distance between the source node and the Sink. Therefore, it is necessary to include the detected time stamp in the data packet, which requires the entire network to perform time Synchronization, which increases hardware complexity and communication overhead

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