Method and system for control of discontinuous reception (DRX) by a mobile device in a wireless communications network supporting voice-over-internet-protocol (VoIP)

摘要

A method and system for controlling discontinuous reception (DRX) in a mobile device in a wireless communications network uses autonomous DRX control after initial VoIP traffic setup. If the mobile device transmits a negative-acknowledgement signal (NACK) indicating unsuccessful receipt of a VoIP packet, then it autonomously turns on a predetermined delay time later to receive the retransmission of the VoIP packet. The predetermined delay time is related to the time for the base station to process the NACK and prepare the VoIP packet for retransmission. When the mobile device transmits or retransmits a VoIP packet, reception is deactivated, but is autonomously activated the predetermined delay time later to receive an acknowledgement signal (ACK) or NACK. VoIP packets may be transmitted from the mobile device the predetermined delay time before VoIP packets are transmitted from the base station.

主权项

1. A method for discontinuous reception in a communication system, the method comprising the steps of:
activating reception for a second transmission of downlink data from a base station upon expiration of a first predefined timer, wherein the first predefined timer is started in a first transmission time interval (TTI) in which a first transmission of the downlink data is received from the base station; receiving the second transmission of the downlink data from the base station in a second TTI after determining the first transmission of the downlink data is unsuccessful; starting a second predefined timer in the second TTI; determining that the second transmission of the downlink data is unsuccessful; and activating reception for a third transmission of the downlink data upon expiration of the second predefined timer.