Method and system for optimizing access to wireless sensor network channel

A wireless sensor and sensor node technology, applied in wireless communication, network topology, advanced technology, etc., can solve the problems of network node delay performance, throughput decline, waste of access channel time slots, network throughput limitations, etc., to achieve Enhance real-time and access scalability, enhance scalability, and improve throughput

CN104320858AActive Publication Date: 2015-01-28NANTONG UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-01-28

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Abstract

The invention discloses a method for optimizing the access to a wireless sensor network channel based on a mixed MAC protocol. The mixed MAC protocol is obtained by mixing a CSMA / CA protocol and a TDMA protocol. The method for optimizing the access to the wireless sensor network channel includes the steps that firstly, sensor nodes in a wireless sensor network with high loads are divided into multiple sets; secondly, the sets have the access to the channel based on the mixed MAC protocol, wherein the sensor nodes in each set independently have the access to the channel in a CSMA / CA protocol competing manner, and the sensor nodes among the sets share and have the access to the channel in a TDMA protocol scheduling mode. In addition, the invention discloses a system for optimizing the access to the wireless sensor network channel based on the mixed MAC protocol. According to the method and system for optimizing the access to the wireless sensor network channel based on the mixed MAC protocol, the channel is used for sending data, the time delay performance of the network can be improved, the handling capacity of the network is improved, energy consumption of the sensor nodes is reduced, the access fairness is improved, and the access expansibility is improved.
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Description

technical field

[0001] The present invention relates to a wireless sensor network (WSN), in particular to a method for optimizing an access channel for a hybrid MAC protocol in a wireless sensor network. Background technique

[0002] As the "Smart Earth" strategy is recognized by countries around the world, the Internet of Things, which is closely related to it, has become the focus of developed countries' development strategies, and WSN, as an indispensable part of the Internet of Things, is playing an increasingly important role. Role.

[0003] Such as figure 1 The WSN architecture shown is mainly composed of sensor nodes, aggregation nodes, and users. Wherein, the wireless sensor node includes: a data acquisition module, a data processing module, a wireless transceiver module and a power management module. The data acquisition module is set to collect physical quantities in nature and perform A / D conversion, and then send them to the processor through the I / O interface...

Examples

Embodiment Construction

[0060] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. For those skilled in the art, the above objects, features and advantages of the present invention will be apparent from the detailed description of the present invention.

[0061] The mixed MAC protocol according to the present invention is based on the mixing of the CSMA / CA protocol and the TDMA protocol, and the method for optimizing access to the wireless sensor network channel based on the mixed MAC protocol includes:

[0062] 1) Group each node according to the time when each sensor node accesses the wireless sensor network, wherein:

[0063] 1.1) Add the address of the sensor node that transmits data based on the CSMA / CA mode in the time frame to the synchronization signal;

[0064] 1.2) Whenever a sensor node is connected to the network, the address of the connected sensor node is added to the group;

[0065] 1.3) When the starting position of t...