Poisson arrival for MAC protocol

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remo 2017-11-17

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https://ww2.mathworks.cn/matlabcentral/answers/367625-poisson-arrival-for-mac-protocol

评论： Tuan Nguyen 2018-10-12

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Hi all,

Good day.

I am trying to understand this piece of code which i modified on top of a code that i acquired from github.io. I am trying to simulate Slotted Aloha protocol.

Node = 10; % number of nodes TOTAL_SLOT_NUMBER = 10000; % simulation time lambda = 1; % average one arrival per time slot q = poissrnd(lambda,Node,TOTAL_SLOT_NUMBER); % generate poisson dist for N and simulation time

        for id=1:1:N % N is number of sensor nodes
            %%Poisson Arrival for every time slot
            is_arrival = rand;
            while is_arrival >=lambda*(exp(-lambda*q(index,t))) % is this correct? i modified this line.index denotes the current sensor node id. index = 1 is sensor node 1. t= current time slot
                % record the number of data frames in the queue
                buffered_number(id) = buffered_number(id) + 1; % array to store buffer data
                generated = generated + 1; % generates new data
                is_arrival = rand*is_arrival;
            end
        end