In this scheme, we control and optimize the D2DR transmit power according to the user requirements in order to mitigate the interference.
Each D2DR accesses a random subset of the shared sub channels that are independent of the other D2DRs whereby each sub channel is accessed with equal probability .
S] at mUE and D2DR from the mBS and D2DS can be expressed as
The aggregate D2DS interference for D2DR is given as
It is important to note that when there is no D2DR competition, we have a normal collision.
D2D] 3: Initialize i to 1 4: mBS checks RB i 5: If i < t then go to the next step 6: mBS checks D2DR using RB and go to step 8 7: If i > t then go to step 11 Else go back to step 4 above 8: If more than D2DRs compete for the same RB with mUE then go to next step Else check i = i+1 and go to back to step 6 9: Assign [P.
D2D] 3: mBS checks the region "r" in which mUE is located 4: Initialize i to 1 5: mBS checks RBi in region "r" of the cell 6: If i < t in region "r" then go to the next step 7: mBS checks D2DR using same RB with mUE in region "r" of the cell and go to step 9 8: If i > t then go to step 11 Else go back to step 5 above 9: If more than D2DRs compete for the same RBi with mUE in region "r" then go 10: Assign [P.
The outage probability is defined as the probability that the SIR of the mUE or D2DR falls below the respective thresholds.
D,thre] are the mUE and D2DR thresholds, respectively.
The mBS does not allocate the same RBs to the mUEs in the same cell, but the D2DSs allocate an RB randomly in the allocated channel groups for each D2DR.
Total System Throughput for D2DR (Mbps) D2D Power (W) Number of D2D Scheme 0.
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