Data priority-based channel contention access method for wireless sensor network

A wireless sensor and data priority technology, applied in wireless communication, network topology, communication between multiple stations, etc., can solve the problems of not distinguishing data packet priority, energy consumption, waste, etc., to improve network energy consumption Efficiency, increased flexibility, and improved timeliness

Inactive Publication Date: 2010-08-04
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] (1) The protocol does not distinguish the priority of data packets, and adopts a consistent CSMA/CA competition mechanism (same CW, BE, NB), but in many application environments such as environmental monitoring and intrusion detection, the priority level of each data packet is different. Similarly, for example, in environmental monitoring, when the monitoring data is within the normal range, the data packet can be allowed to reach the destination node with a certain delay. The packet needs to reach the destination node with the shortest possible delay. The priority of the data packet in these two cases is obviously different, and the standard does not take this into account
[0010] (2) T

Method used

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  • Data priority-based channel contention access method for wireless sensor network
  • Data priority-based channel contention access method for wireless sensor network
  • Data priority-based channel contention access method for wireless sensor network

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Embodiment Construction

[0032] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0033] In order to facilitate the understanding of the present invention, first the concepts used in the text are explained:

[0034] LR-WPAN Low Speed ​​Wireless Personal Area Network

[0035] HR-WPAN High Speed ​​Wireless Personal Area Network

[0036] WSN wireless sensor network

[0037] MAC media access control

[0038] CSMA / CA Carrier Sense Multipoint Access / Collision Avoidance

[0039] CAP Contention Access Period

[0040] CCA Clear Channel Estimation

[0041] CFP non-contention access window

[0042] BLE battery life extension

[0043] BOP Beacon Period

[0044] ACK confirmation frame

[0045] QoS Quality of Service

[0046] Business data: The smallest unit that carries information, generally the original data collected by the device.

[0047] Control information overhead: In order to send business data reliably and efficiently, control information...

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Abstract

The invention discloses a data priority-based channel contention access method for a wireless sensor network. The method of the invention ensures different performance index requirements by adopting different channel access mechanisms according to the priority levels (high and low levels) of data packets. In addition, aggregation factors are introduced into the transmission of the data packets, and the data packets are aggregated by using the local calculation and storage capacity of a node on the premise of meeting the specific network performance requirement, so the framing efficiency is improved and the energy consumption efficiency is further improved. Through the parameter aggregation factors, the network can be flexibly selected between the energy consumption efficiency and the data average packet delay.

Description

technical field [0001] The invention relates to a channel competition access method based on data priority in a wireless sensor network, which is suitable for a series of wireless sensor network applications in star or tree network topologies such as military defense, environmental monitoring, and industrial and agricultural production. Especially in applications where the network load is not heavy and data packets have different priorities, it can greatly reduce the delay of high-priority data packets and improve the flexibility of network configuration without losing part of the network performance. Background technique [0002] Wireless sensor network (WSN) is a task-based wireless network, a wireless network composed of a large number of stationary or mobile sensor nodes with wireless communication and data processing capabilities in a self-organizing or multi-hop manner, the purpose of which is to cooperatively perceive , Collect, process and transmit the monitoring inf...

Claims

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Application Information

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IPC IPC(8): H04W74/08H04W84/18H04B7/26
CPCY02B60/50Y02D30/70
Inventor 徐平平夏桂斌王岩周倩付雅晶
Owner SOUTHEAST UNIV
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