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Wireless sensor network and association request sending method

A wireless sensor network, wireless sensor technology, applied in network topology, wireless communication, star/tree network, etc., can solve the problem of association request being easily affected by data conflict, node association delay, association request resending, etc.

Active Publication Date: 2020-12-29
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Sending an association request during a shared slot is not efficient because association requests are susceptible to data collisions, which can cause the association request to need to be resent
Sending association requests consumes a lot of power, so resending association requests reduces the power efficiency of the WSN
As mentioned above, since association requests are sent during shared slots, some intermediate nodes may not listen during shared slots to save power, which can further cause node association delays
Also, since the aforementioned nodes do not listen during the shared slot, an additional association request needs to be sent
Sending extra association requests reduces efficiency

Method used

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  • Wireless sensor network and association request sending method
  • Wireless sensor network and association request sending method
  • Wireless sensor network and association request sending method

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Embodiment Construction

[0009] figure 1 is a block diagram of an example wireless sensor network (WSN) 100 . WSN 100 includes a plurality of leaf nodes 102 , a plurality of intermediate nodes 104 and a coordinator or root node 106 . Leaf nodes 102 are labeled leaf nodes 110-115, respectively. The intermediate nodes 104 described herein include two groups: first intermediate nodes 116 and second intermediate nodes 118 . The first intermediate nodes 116 are respectively labeled as intermediate nodes 120-124, and the second intermediate nodes 118 are respectively labeled as intermediate nodes 125-127. The arrangement of nodes in WSN 100 is for exemplary purposes only, and virtually any arrangement of nodes may be utilized in other WSNs. The WSN 100 facilitates the sending of data from the leaf nodes 102 to the root node 106 and, in some implementations, instructions are sent from the root node 106 to various leaf nodes 102 and / or intermediate nodes 104 . For example, a leaf node 102 may have sensors...

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Abstract

This application relates to a wireless sensor network and a method for sending an association request. A method of sending an association request in a wireless sensor network 100 includes: sending an association request from a leaf node 102 to an intermediate node 104 . The method further includes, during either of the shared or dedicated time slots, sending an association request from the intermediate node 104 in response to at least one of the timing of the dedicated time slots and the data collision rate during the shared time slots.

Description

Background technique [0001] A wireless sensor network (WSN) includes multiple spatially distributed intermediate nodes and leaf nodes, where the leaf nodes send data to the central node or the root node through the intermediate nodes. Some leaf nodes include sensors that monitor physical or environmental conditions such as temperature, sound and pressure and send data indicative of these parameters to the central node over the network. For example, a WSN can be installed in a forest to detect when a fire is starting. Some leaf nodes and / or intermediate nodes can be equipped with sensors to measure temperature, humidity and gases produced by a tree or vegetation fire. The measured data is sent to the central node through the intermediate node, and the central node sends the data to the data processor to complete early fire detection. [0002] WSNs usually have multiple branches, where a leaf node is the furthest node on a branch from the central node. Before a leaf node can ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/08H04W84/18H04W4/70
CPCH04W48/08H04W84/18H04W4/70H04W48/16H04W72/0446H04W74/02H04L41/0886H04L12/44
Inventor A·E·扎法J·周A·康达路拉乌R·努扎茨
Owner TEXAS INSTR INC