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