Research Article

Improving Energy Efficiency of Multimedia Content Dissemination by Adaptive Clustering and D2D Multicast

Algorithm 3

The base station multicast power assignment and selection of D2D multicast relays.
Run at the MCP
Input: dmin, dmax, Δd, and η
Output:
(1) Invoke Algorithm 1 to get Nk and MTK
(2) Notify η, Nk, and MTK to all the DCHs
(3) Initialize the set Dk as “empty
(4)For each member (xk, yk) of Nkdo
(5)   // is the coordinates of BS, and lk is the distance between BS and DCH k
(6)  Compute according to formula (5) by using as the input // is the channel gain from BS to DCH k
(7)  Add () to Dk
(8)End for
(9)If receive from all the DCHs then
(10)  Initialize μ as “0”
(11)  For (d = dmin; d < dmax; d = d + Δd) do //Δd is the incremental step of the coverage radius for BS
(12)   Initialize and as “0” respectively
(13)   For each member () of Dkdo
(14)    If d < lk + Δd then End if
(15)    If d < lk + Δd and then End if
(16)   End for
(17)   Broadcast test packet at
(18)   Calculate the related parameters (e.g., φt, φc, and φout,k) according to feedback of test packet
(19)   Compute μmcp according to formula (10)
(20)   If μ<μmcp then {μ = μmcp; dse = d} End if
(21)  End for
(22)  For each member () of Dkdo
(23)   If dse<lk + Δd then βk = 1 and send it to DCH k End if
(24)   If dse<lk + Δd and then αk = 1 and send it to DCH k End if
(25)  End for
(26)End if