Wireless chain-type transmission system

Abstract

The invention discloses a wireless chain-type transmission system. The wireless chain-type transmission system comprises a plurality of nodes, wherein the nodes are arranged in a chain mode and are divided into three layers. The first layer of nodes is composed of ordinary nodes, wherein the ordinary nodes are used for collecting data of a wireless sensor network on the site. The second layer of nodes is composed of cluster-head nodes, wherein the cluster-head nodes are used for aggregating the data collected by the ordinary nodes within the coverage area of the cluster-head nodes, the cluster-head nodes which are in direct communication with aggregation nodes are named forwarding cluster-head nodes, and the forwarding cluster-head nodes are used for forwarding data of the other cluster-head nodes to the aggregation nodes and are further used for transmitting data of the ordinary nodes within the coverage area of the forwarding cluster-head nodes to the aggregation nodes. The third layer of nodes is composed of the aggregation nodes, wherein the aggregation nodes are used for receiving the data transmitted by the forwarding cluster-head nodes and forwarding the data to a user. According to the wireless chain-type transmission system, transmission delay of data packets is reduced, reliability of a chain-type network is improved, the energy utilization ratio of the chain-type network is increased, and the load of the chain-type network can be balanced.

Description

technical field [0001] The invention relates to the fields of sensor technology and wireless communication technology, in particular to a wireless chain transmission system, which belongs to the field of wireless sensor network applications. Background technique [0002] In the existing wireless sensor network, it is generally assumed that its nodes are relatively concentrated in a two-dimensional or three-dimensional space, but in some cases, due to the influence of natural landscapes or artificial facilities, a slender chain-like range is formed. For example, roads, bridges, tunnels, pipelines, high-voltage transmission lines, etc. There are many applications similar to the above, and the main characteristics of the chain network are as follows: (1) The limitation of geographical location requires sensors to be distributed according to the chain structure, and their positions are fixed and difficult to change; (2) Node resources are limited: low energy Supply, low bandwid...

AI Technical Summary

Problems solved by technology

Disadvantages: ZigBee's rich functions are at the cost of increasing the amount of data interacted in the routing process. In chain monitoring applications, the distribution of monitoring nodes is relatively sparse, the transmission power of nodes is also large, and the energy consumed by single-hop transmission of data packets It should not be underestimated. In this case, the use of complex protocol stacks will generate some unnecessary overhead, which will increase the energy consumption of nodes, slow down the response speed, and cause more harm than good.

At the same time, the ZStack protocol stack is completely a compiled function library, and does not support any modification of its core code by users, so it cannot be tailored and optimized

Since the ZigBee protocol is a general wireless sensor network protocol, it does not target a specific application in a specific scenario, and the wireless chain transmission system requires sensors to be distributed in a chain structure, and the distance between adjacent nodes is relatively long. Hardware is required to increase the transmit power and receive sensitivity, and the power consumption of the radio frequency circuit will increase significantly; how to ensure reliable data transmission from each node to the sink node in the chain network; due to the single structure of the chain network, data transmission has a single The closer the node is to the sink node, because the frequency of forwarding messages is much higher than that of other nodes, it will form the energy hole effect of the chain network, causing other nodes in the network to still have higher energy when the network fails, that is, how to improve energy utilization rate, reduce energy consumption and achieve network load balancing

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