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Bandwidth allocation method for extension class division multiple access of wireless sensing network

A bandwidth allocation method and wireless sensor network technology, applied in wireless communication, network topology, electrical components, etc., can solve problems such as low bandwidth efficiency

Inactive Publication Date: 2011-04-06
BEIHANG UNIV
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Problems solved by technology

[0014] Although the channel information of the nodes fed back by the fusion center can improve the estimation performance, the feedback channel information requires the nodes to transmit the training sequence for channel estimation to the fusion center, and the fusion center needs to transmit their own channel information to each node separately. The above two processes Both need to be realized by orthogonal multiple access, so in large-scale wireless sensor networks, the problem of low bandwidth efficiency is still unavoidable

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  • Bandwidth allocation method for extension class division multiple access of wireless sensing network
  • Bandwidth allocation method for extension class division multiple access of wireless sensing network
  • Bandwidth allocation method for extension class division multiple access of wireless sensing network

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Embodiment Construction

[0035] The bandwidth allocation method that the present invention proposes is used for wireless sensor network extended classification multiple access, comprises the following steps:

[0036] (1) Each node in the wireless sensor network observes the parameter θ in the working environment of the wireless sensor network, and obtains the observation result x i , the node will observe the result x i Perform M-level quantization, and define M quantization values ​​as S m , m=1,..., M, nodes with the same quantization value are divided into a node class, and the quantization value of the i-th node is set to S m , then the i-th node belongs to the m node class;

[0037] (2) In the initial state, each node distributes the initial K evenly for each node class m bandwidth, each node generates an orthogonal waveform according to the allocated bandwidth: φ m，k (t), m=1,..., M, k=1,..., K m , where 0≤t≤T, T is the time width of the quadrature waveform;

[0038] (3) Each node selects ...

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Abstract

The invention relates to a bandwidth allocation method for extension class division multiple access of a wireless sensing network, belonging to the technical field of wire communication. The bandwidth allocation method comprises the following steps of: firstly observing parameters by nodes, quantizing the observation results, generating an orthogonal waveform by each node according to the allocated bandwidth, selecting one orthogonal waveform, and transmitting the observation result to a fusion center in the wireless sensing network; receiving a transmission signal of each node by the fusion center, carrying out matched filtering and parameter estimation on the received signals and transmitting the estimation information to each node; reallocating the bandwidth for each node class by eachnode according to the received estimation information, and reallocating bandwidth by the nodes when the next measurement is carried out on the wireless sensing network. The method of the invention can utilize the bandwidth resources with higher efficiency and simultaneously improves the estimation quality of the fusion center on the parameters to be observed and the use efficiency of the communication bandwidth.

Description

technical field [0001] The invention relates to a bandwidth allocation method for extended classification multiple access of a wireless sensor network, which belongs to the technical field of wireless communication. Background technique [0002] Wireless sensor network is a kind of wireless communication network widely used in industrial and agricultural production, smart home, environmental monitoring and other fields. A wireless sensor network usually consists of a large number of sensor nodes and a fusion center, which is responsible for observing physical quantities such as temperature and humidity in the environment. The sensor nodes are equipped with sensing elements, which can observe physical quantities such as temperature and humidity, and then the sensor nodes transmit the observation results to the fusion center through the communication circuit. Limited by communication bandwidth, energy consumption and other factors, sensor nodes need to choose a communication ...

Claims

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Application Information

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IPC IPC(8): H04W72/04H04W84/18
Inventor 王新杨晨阳
Owner BEIHANG UNIV
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