Method for constructing medium-range wireless sensor network used for field information acquisition

Abstract

The invention relates to a method for constructing a medium-range wireless sensor network used for field information acquisition. The method comprises the following steps that: a network divides each sampling period into a plurality of time slots to be allocated in advance; a sink node monitors network-accessing requests sent by other nodes when applying network access, and if the information is received, the sink node temporarily allocates a communication time slot to each node sending the request and replys; the sink node monitors confirmation frames in the allocated communication time slots, if the confirmation frames are received, the sink node allocates available time slots, and a next hop of the sink node is generated by accessing the network via the node; the nodes which have already accessed the network process the network accessing request frames of other nodes in the same mode; and the nodes which do not access the network send the network accessing request frames in the network accessing request time slots, and after the network accessing request time slots are ended, the nodes select a node which have already accessed the network as the father node to access the network until the wireless sensor network which has low collision probability and has high transmission efficiency is constructed, wherein the nodes hibernate in the non-working time slots and the hibernation is ended when the working time slots arrive.

Description

technical field [0001] The invention relates to the field of wireless sensor networks, in particular to a medium-range wireless sensor network networking method for field information collection. Background technique [0002] The main task and purpose of the sensor network is to transmit the information collected by all sensor nodes in the network to the base station (that is, the sink node). Due to different application scenarios, the size of the network acquisition area and the distance between nodes of wireless sensor networks are different. The most common one is the wireless sensor network used in home furnishing. The distance between nodes ranges from a few centimeters to tens of meters. This is also a result of the energy limitation of the wireless sensor network. However, when applied to field information collection, because the general collection area is relatively far away from the information collector and the collection range is relatively large, the distance bet...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a medium-range wireless sensor network networking method for field information collection, which solves the problem that most of the existing wireless sensor network technologies are limited to short-range and small-scale applications

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