This information is relayed using {HEAD ~ the Network layer} to provide feedback to {TAIL ~ the MAC layer} in order to improve the end to end performance of VoIP services 
This information is relayed using { HEAD ~ the Network layer } to provide feedback to { TAIL ~ the MAC layer } in order to improve the end to end performance of VoIP services
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH