Energy-Efficient Multicast Transmission for Underlay Device-to-Device Communications: A Social-Aware Perspective

Algorithm 2

A social and energy-aware CH update scheme.

()  : List of D2D groups

()  : List of CUE items

()  , ,

()  while  , , and   do

()  Compute from (9)

()  if    then

()  Compute from (19)–(21),

()    if  

()     ,

()    ,

()   else

()    ,

()   end if

()  else

()    ,

()  end if

() Build from (24), and obtain by eigen-decomposition of through (23)

()  if  

()   ,

()  else

()   ,

()  end if

()   Find

()   

()   ;

() end while