Patent ID: 9622289
Date: 2017-04-11
CPC Classifications: H04L,H04W

Claim:
1. A method for a first wireless user equipment (UE) to perform wireless communication, comprising: establishing a voice-over long-term evolution (VoLTE) call with a second UE via a cellular network, wherein establishing the VoLTE call comprises receiving an indication of an initial discontinuous reception (DRX) cycle length for the VoLTE call from the cellular network; performing VoLTE communication with the second UE via the cellular network in a DRX mode with the initial DRX cycle length; sending a real-time transport control protocol (RTCP) sender report to the second UE; receiving an RTCP received report from the second UE in response to the RTCP sender report; estimating real-time transport protocol (RTP) end-to-end delay between the first UE and the second UE based on the RTCP received report; comparing the estimated RTP end-to-end delay with one or more delay thresholds; determining, based on said comparing, whether or not to modify DRX cycle length for the VoLTE call; if it is determined to modify DRX cycle length for the VoLTE call: