{TAIL ~ A buffer information report} can be sent to {HEAD ~ a system station} from a node for relaying communications between at least one user station and the system station 
{ TAIL ~ A buffer information report } can be sent to { HEAD ~ a system station } from a node for relaying communications between at least one user station and the system station
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH