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Adaptive and multirate channel adjusting method suitable for wireless sensor network

A wireless sensor and adjustment method technology, applied in wireless communication, network topology, network traffic/resource management, etc., can solve problems such as inability to adapt to channel changes, avoid power consumption overhead, prolong life cycle, and solve power consumption sensitive Effect

Active Publication Date: 2012-03-07
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0004] For this reason, the purpose of the present invention is to provide a kind of channel self-adaptive multi-rate adjustment method suitable for wireless sensor networks, solve the shortcoming that original multi-rate adjustment method can't adaptive channel change situation

Method used

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  • Adaptive and multirate channel adjusting method suitable for wireless sensor network
  • Adaptive and multirate channel adjusting method suitable for wireless sensor network
  • Adaptive and multirate channel adjusting method suitable for wireless sensor network

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Embodiment Construction

[0034] Below, the substantive features and remarkable progress of the present invention will be further described through the description in conjunction with the accompanying drawings, but the present invention is by no means limited to this embodiment. This method is aimed at the n-level multi-rate (R 0 ~R n-1 ) for adjustment, where the lowest rate level is 0 and the highest rate level is n-1.

[0035] 1. Initial multi-rate adjustment strategy selection

[0036] When the wireless sensor network node initializes the transmission, it adopts the fast channel multi-rate adjustment strategy to quickly adapt to the unknown wireless channel conditions.

[0037] 2. Data frame sending process ( image 3 )

[0038] 1) The sender waits for the data frame;

[0039] 2) Update the current multi-rate strategy, CurrStatus=NextStatus;

[0040] 3) According to the selected multi-rate strategy, decide to update the current transmission rate CurrRate;

[0041] 4) Send the data frame with...

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Abstract

The invention discloses an adaptive and multirate channel adjusting method suitable for a wireless sensor network. The method is characterized in that: the adjusting method is a mixed multirate adjusting strategy, which comprises a fast channel adjusting strategy and a slow channel strategy. On the basis of statistics on sending situations, when there is a fast-changing channel strategy mode, if a plurality of continuous data packets are sent successfully at a same rate, the mode is switched to a slow-changing channel strategy mode; and when there is the slow-changing channel strategy mode, if data transmission failures continuously occur and the transmission failures can not be solved by reducing transmission rates, the mode is switched to a fast channel strategy mode. When there is a fast channel strategy state, transmit-receive sides decide an optimum transmission rate by a handshake decision; and when there is a slow channel strategy state, the sending side selects an optimum transmission rate according to historical transmission statistical information. According to the method provided in the invention, a defect that adaptive channel changing can not be carried out in the current multirate adjusting method is overcome; meanwhile, a problem that power consumption is sensitive when a wireless sensor network employs a traditional multirate adjusting method is solved.

Description

technical field [0001] The invention relates to a channel adaptive multi-rate adjustment method suitable for a wireless sensor network, which belongs to the field of data transmission of randomly arranged wireless sensor nodes. Background technique [0002] Wireless sensor networks are widely used in national defense and military, environmental monitoring, smart home and other fields. The physical layer and media access layer usually use wireless personal area network technology, which requires its communication network to meet low power consumption, low cost, low complexity, etc. Require. Wireless sensor nodes work in a complex and changeable wireless environment. Due to the influence of factors such as multipath effect and Doppler frequency shift, the data is uncertain at the time of transmission. If a fixed transmission rate is adopted, the network performance will fluctuate greatly, which is not conducive to the maximum network throughput of the system, and cannot well ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/22H04W84/18H04L1/00
Inventor 解永生王翔周磊磊付耀光王营冠
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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