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Need help with the cell size in NS2

  • Charles Pandian
    Keymaster

    If the transmission power is very low, then the nodes will not receive
    anything and hence could not involve in any communication. the following
    table can be used for calculating the distance with respect to the Pt_ , and
    it is a rough estimate.

    Let us assume that a receiving node is set at this following parameters.

    Phy/WirelessPhy set RXThresh_ 630e-15
    Phy/WirelessPhy set CSThresh_ 630e-15

    This means, that node only consider a carrier signal which is having energy
    630e-15 or higher and forward the received frame if the signal energy is
    630e-15 or higher.

    By increasing transmission power, the signal may reach a node but it will be
    ignored if the signal strength is less than RXThresh_ or CSThresh_ at
    receiving end.

    #505 July 13, 2007 at 1:26 pm
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  • allke0527
    Participant

    Thanks very much for your reply and your help. But can you tell me how to calculate the coverage and how can you get Pt_=0.2891 is for 250m so that I can calculate the coverage I want such as 50m.

    And does it mean that the coverage of the basestation is just defined by these three factors?

    And another very important question which is always bothering me. In the coverage area of the bstation, is the signal strength always constant? Or it will go down along with the increase of distance.

    Thanks very much in advance!

    #506 July 13, 2007 at 5:09 pm
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