This will be done by searching for {TAIL ~ other OW signals} than the OW of {HEAD ~ his own cell group} 
This will be done by searching for { TAIL ~ other OW signals } than the OW of { HEAD ~ his own cell group }
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD