{HEAD ~ A communication system} includes a plurality of channels, {TAIL ~ a first service} that utilizes at least a first channel for transmission, and a second service that utilizes at least a second channel for transmission 
includes
{ HEAD ~ A communication system } includes a plurality of channels , { TAIL ~ a first service } that utilizes at least a first channel for transmission , and a second service that utilizes at least a second channel for transmission
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH