[Retracted] Finder-MCTS: A Cognitive Spectrum Allocation Based on Traveling State Priority and Scenario Simulation in IoV

Algorithm 1

Constraint-oriented expansion for vehicle .

Input:

  - channel availability matrix

  - SU-SU interference constraint matrix

  - channel allocation matrix

  - the maximum allowable interference level of channel

  - the available bandwidth of channel

  - the maximum allowable interference power of PU on channel

Output:

  - the action space/set of vehicle under the current node

 Function Action

1: 

2: for each in the -th row of matrix do

3:  ifthen

4:   

5:  end if

6: end for

7: for each in 1 columns of the -th row of matrix do

8:  for each in do

9:   if and then

10:    ifthen

11:     remove from

12:    end if

13:   end if

14:  end for

15: end for

16: for each in do

17:  if the available channel for the vehicle does not satisfy the constraint (1) and constraints (5a)–(5g) then

18:   remove from

19:  end if

20: end for

21: ifthen

22:  the algorithm does not perform the allocation for vehicle and waits for the allocation of the next user according to the

23: end if