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 for hybrid automatic repeat-request (HARM) in a communication system, the method comprising:
starting a predefined timer in a transmission time interval (TTI) in which downlink data in a first transmission is received from a base station, wherein a duration of the predefined timer is a round-trip time (RTT); transmitting a negative-acknowledgement signal (NACK) to the base station; and activating reception for a second transmission of the downlink data from the base station upon expiration of the predefined timer, wherein the second transmission is asynchronous.