Measurement signal transmission/reconstruction method, corresponding device and wireless sensor network
A technology for measuring signals and sensor nodes, which is applied in the network field, can solve the problems of large transmission delay of measurement signals, affect the overall performance of the system, and reduce the signal performance of aggregation nodes, etc., to achieve the effect of reducing interference
Active Publication Date: 2016-12-21
南通云尚找家纺电子商务有限公司
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Problems solved by technology
Obviously, in this transmission mode, for a wireless sensor network with a large number of sensor nodes, there will be a large transmission delay in the transmission of measurement signals, which will affect the overall performance of the system.
At the same time, in the multi-hop transmission of wireless communication, each hop will introduce noise. Taking node d as an example, while completing the reception of X1, X2 and X3, it will receive white noise in 3 time slots. Superposition operation, then the white noise in the three time slots will be superimposed together, which will cause the performance of the signal at the sink node to degrade during reconstruction
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[0033] In the following description, for purposes of illustration rather than limitation, specific details such as specific system architectures, interfaces, and techniques are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
[0034] A detailed description will be given below in conjunction with the accompanying drawings and embodiments.
[0035] Compressed sensing theory holds that: for an N-dimensional observation set X, where X∈R N , R is a set of real numbers, if there is an orthogonal basis Ψ such that the projection coefficient Θ=Ψ of X on it-1 X has only K non-zero elements, and KM , and M where x ...
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The application discloses a measurement signal transmission / reconstruction method, corresponding equipment and a wireless sensor network. Wherein, the transmission method includes: receiving first measurement signals formed by multiple subordinate nodes directly connected to the current node, wherein the second measurement signals simultaneously sent by multiple subordinate nodes are summed in the air to form the first measurement signal; Adding the first measurement signal and the third measurement signal obtained by sampling and processing by the local node to obtain a fourth measurement signal; sending the fourth measurement signal to the upper node simultaneously with peer nodes connected to the same upper node. Through the above method, the transmission time delay of the measurement signal in the wireless sensor network is effectively reduced.
Description
technical field [0001] The present application relates to the field of network technology, in particular to a measurement signal transmission / reconstruction method, corresponding equipment and a wireless sensor network. Background technique [0002] Wireless sensor network (WSN, Wireless Sensor Networks) is a wireless network composed of sensors with perception, computing and communication capabilities in a point-to-point manner. Through the division of labor and cooperation of sensor nodes in the network, the wireless sensor network can monitor, perceive and collect information of various environments or monitoring objects in the network distribution area in real time. Among them, the transmission of sampled data is one of the main tasks of wireless sensor network: the sensor nodes collect the sampled data to the sink node in the way of wireless transmission. [0003] The existing technology provides a traditional multi-hop transmission method, that is, the lower-level nod...
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IPC IPC(8): H04L29/08H04W84/18
Inventor 刘雨赖冠宏张永平王悦
Owner 南通云尚找家纺电子商务有限公司