The number of subchannel varies from (4, 16, 32, 64), using Matlab to simulate relay communication in different network mode: 1) water filling only 2) buffer only 3) buffer + water-filling -The number of subchannel varies from (4, 16, 32, 64), using Matlab to simulate relay communication in different network mode: 1) water filling only　2) buffer only　3) buffer+ water-filling