MATLAB: Can anyone help me in simulating a Wireless sensor Network with 100 nodes in it.

wireless sensor network with 100 nodes

I want to implement Wireless Sensor Network with following specifications

-> Sensors are sensing data and are at fixed locations. Sensors are to sense signals from body(Wireless Body Area Sensors)

-> Here the spectrum is ISM band, hence we need to have an efficient channel access mechanism ie I have to use CSMA/CA and don't know how to simulate one.

-> Sensors should work at 20Kbps and also the effect of energy needs to be included in the simulation.

-> There cannot be forwarding of data from one sensor to another sensor as each one has their own data to transmit.

-> I am essentially trying to simulate only the MAC and the physical layer.

-> I am also struck up with how to do this synchronization between the nodes, as I want to implement TDM and also FDM if possible between these nodes.

Please let me know if someone can help me. With Reagrds, Shravan

Best Answer

Do you have any paper that you are following. This work is equivalent to a Thesis or dissertation.

Anyways since you asked, here are the steps: (assuming you are performing energy based simulations)

1. Model the network (something like a meshgrid) 2. Model the channel (depending on the quantization) 3. Model individual sensors (as a cost of energy efficiency and communication) 4. add random noise to the system 5. For a particular target in the network (particular position, power, start with initial conditions and run monte carlo simulations)

OR follow the protocol given in the following paper: www.isi.edu/~johnh/PAPERS/Ye02a.pdf

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MATLAB: How to simulate a wireless sensor network with 500 homogeneous nodes in an area of 100 m X 100 m with a base station at fixed position (0,150) with unlimited energy residues and communication power ? and how to form clusters in this given network

http://www.mathworks.com/matlabcentral/answers/8026-best-way-s-to-master-matlab

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

MATLAB: Reference to non-existent field ‘xd’. Kindly help .

The problem is related to structure C, not structure S.

The fields xd and yd of structure C are defined inside while loops whose conditions are never true on the 250th iteration of the r loop, thus you do not define those fields. This pretty easy to check: just run the code until the error occurs, then check the values in the workspace:

>> h
h =  1
>> i
i =  1
>> r
r =  250
>> C
C =
  1x250 struct array containing the fields:
    distance
    id
>> countCHs
countCHs = 0
>> t
t = 0
>> k
k =  20

It is quite clear that the conditions, e.g.:

while (countCHs < t)

are not met, so those while loops don't run.

Best Answer

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MATLAB: How to simulate a wireless sensor network with 500 homogeneous nodes in an area of 100 m X 100 m with a base station at fixed position (0,150) with unlimited energy residues and communication power ? and how to form clusters in this given network

MATLAB: Reference to non-existent field ‘xd’. Kindly help .

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