Synchronized cyclic scheduling technique for media access oriented to wireless sensor network

A wireless sensor and media access technology, applied in the direction of synchronization device, wireless communication, data exchange network, etc., can solve the problems of limited popularization and application, self-organization and weak scalability, so as to avoid sending conflicts and reduce receiving waiting time , enhanced self-organization and scalability

Inactive Publication Date: 2008-10-22
张宝贤 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can effectively avoid conflicts, but it imposes strict requirements on the synchronization between nodes, and its self-organization and scalability are weak, which limits its popularization and application.

Method used

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  • Synchronized cyclic scheduling technique for media access oriented to wireless sensor network
  • Synchronized cyclic scheduling technique for media access oriented to wireless sensor network

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Embodiment Construction

[0011] The technology involved in the present invention is based on the idea of ​​TDMA technology, and has no special requirements on the network structure.

[0012] First, the wireless channel is divided into periodic frames, and each frame is divided into several equal-length time slots, and each node can allocate one or more time slots. This (or these) time slots are called the primary time slots of the node; and, this (or these) time slots also become the non-primary time slots of the adjacent nodes of the node. A node that is not assigned a primary slot becomes a node without a primary slot.

[0013] Each node has different working status and processing logic in the main time slot and non-main time slot, please refer to the attached figure 1 .

[0014] (1) The working process of the node in the main time slot is as follows:

[0015] 1. During the protection period 1, the transmitter is ready to open, but does not send / receive data.

[0016] 2. In the sending cycle, fi...

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Abstract

The invention provides a synchronizing cycle scheduling algorithm by accessing a wireless sensor network media to a control layer. The algorithm defines a characteristic frame structure and a time slot structure and has the characteristics of low node energy consumption, small transmission time lapse, easy realization, etc. The algorithm has the advantages that: 1) a time slot division method is adopted to avoid sending conflict between nodes and reduce the waiting time for receiving, thereby saving the node energy and having no strict need to node synchronization and easy realization. 2) The algorithm defines the characteristic frame structure and the processing flow in order that each node in a movable time slot (main time slot) has a scheduling function and can send data and receive data and information which is randomly accessed. 3) The node can freely adjust a sending and a receiving bandwidths with each adjacent node in the main time slot according to the needs. 4) Through setting a sending and a receiving cycles in a time slot, one node can acquire a plurality of chances to send the data in every frame cycle, thereby greatly reducing the network time lapse.

Description

technical field [0001] The invention relates to a wireless sensor network-oriented media access synchronous period scheduling technology, which is mainly used to solve the problem of the media access control mechanism in the current wireless sensor network. In this technology, a media access control layer synchronization cycle scheduling algorithm is proposed, and a unique frame structure and time slot structure are defined. The application of this technology can effectively reduce the energy consumption of sensor nodes, reduce the delay of information transmission, and is easy to implement in actual products, thus promoting the practical and effective application of wireless sensor network technology in various industries. Background technique [0002] The characteristics of the wireless sensor network are that the energy of the working nodes is limited, the nodes work in the simplex communication mode, share the communication channel, the number of nodes is large, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28H04L12/56H04J3/16H04W56/00H04W72/12
Inventor 张宝贤高雪
Owner 张宝贤
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