The method can simplify {HEAD ~ the signaling interaction} between {TAIL ~ the network entities}, reduce the network complexity and save the network resources 
between
The method can simplify { HEAD ~ the signaling interaction } between { TAIL ~ the network entities } , reduce the network complexity and save the network resources
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH