Bandwidth allocation method used for wireless sensor network extending class division multiple address access

A bandwidth allocation method and wireless sensor network technology, applied in wireless communication, network topology, network planning and other directions, can solve problems such as low bandwidth efficiency, and achieve the effect of improving estimation quality and efficient bandwidth resources

Inactive Publication Date: 2011-04-20
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 used for wireless sensor network extending class division multiple address access
  • Bandwidth allocation method used for wireless sensor network extending class division multiple address access
  • Bandwidth allocation method used for wireless sensor network extending class division multiple address access

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Embodiment Construction

[0036] The bandwidth allocation method for wireless sensor network extended classification multiple access proposed by the present invention comprises the following steps:

[0037] (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;

[0038] (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;

[0039] (3) Select one of the orthogonal ...

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Abstract

The invention relates to a bandwidth allocation method used for wireless sensor network extending class division multiple address access, belonging to the technical field of wireless communication. The bandwidth allocation method comprises the following steps: observing the parameters by each node; quantifying the observation results; evenly distributing initial bandwidth for each node; generating orthogonal wave shapes according to the distributed bandwidth; selecting an orthogonal wave shape from the generated orthogonal wave shapes; transmitting the observation result to a fusion center in the wireless sensor network; obtaining a receiving signal after the fusion center in the wireless senor network receives the transmission signals from each node; carrying out matched filtering treatment on the receiving signal by the fusion center; calculating the detection feedback quantity by a fusion center; and redistributing the bandwidth for each node by each node according to the detection feedback quantity. Through using the expanding class division multiple address mode, in the bandwidth allocation method, the bandwidth resources are efficiently utilized, and simultaneously the estimation quality of the fusion center to the parameters to be observed and the use ratio of the communication bandwidth are improved.

Description

technical field [0001] The invention relates to a bandwidth allocation method for extended class multiple access of a wireless sensor network, and 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 scheme with...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04W84/18
Inventor 王新杨晨阳
Owner BEIHANG UNIV
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