MMW-NOMA: An Uplink NOMA Communication System Based on the Node Pairing Algorithm of Maximum and Minimum Weight in Underwater Acoustic Networks

Algorithm 1

The maximum and minimum weight-based pairing algorithm.

1: Procedure()

2: Input:λ, η

//input the residual energy factor, distance factor

3: For (i =0; i <20; i++) {

4:  

      //calculate the Euclidean distance between node i and buoy B

5:  

         //compute the pairing weight of node i

6:  Map.Add(, i);

       //map node i and the corresponding pair weight

7:  }

8: End for

9:  keyVlaues = map.getKeys();

       //calculate the weights of all mapped nodes;

10:  Sort(keyVlaues);

          //order the node weight

11:  m =0

      //the pointer points to the minimum weight of the node

12:  n = arr.Length – 1

      //the pointer points to the maximum weight of the node

13: While (m < n) do

14:  {

15:  Max = map.getValues(keyVlaues[n])

       //get the node of maximum weight

16:  Min = map.getValues(keyVlaues[m])

          //get node of minimum weight

17:  Nodes.Add()//add a node pair

18:  m++

       //move the pointer to the second smallest weight

19:  n--

       //move the pointer to the next highest weight

20:  }

21: End while

22: Output:   //output the paired node pair nodes

23: End procedure