00327pam a2200121 a 4500020000500000041000800005082001300013100002500026245005800051260004800109300001600157653003200173 c aeng a050bCHE aCheung K ,eAuthor . aIEEE Communication Magazin Vol - 47 , hBound Volumes a[s.l]:bIEEE Communication Society ,c2009. bHb;c28*20. aGeneral serial publications