Reducing power consumption in voice over LTE terminals using semi persistent scheduling in connected discontinuous reception mode

摘要

A connection with a network that includes a base station (BS) may be established by a user device (UE) via a wireless connection, for conducting communications using semi persistent scheduling (SPS) in a connected discontinuous reception (C-DRX) mode. The SPS transmit periodicity may be adjusted with respect to the SPS activation command and the SPS interval UL (for uplink). Data may then be transmitted during the C-DRX On-Duration periods according to the determined SPS transmit periodicity. In some embodiments, the SPS transmit periodicity is adjusted such that following a first C-DRX On-Duration period when an SPS activation command is received, SPS data transmission occurs a specified number of subframes earlier during each subsequent C-DRX On-Duration period than in the first C-DRX On-Duration period. The SPS data transmission in each subsequent C-DRX On-Duration period may take place as soon as the UE device wakes up during the On-Duration period.

主权项

1. A wireless user equipment (UE) device, the UE comprising:
radio circuitry, comprising one or more antennas for facilitating wireless communications; and a processing element, coupled to the radio circuitry, and configured to interoperate with the radio circuitry to cause the UE device to:
adjust a semi persistent scheduling (SPS) transmit periodicity with respect to an SPS activation command and SPS interval;establish a connection with a network via a wireless link;communicate with the network via the wireless link using connected-mode discontinuous reception (C-DRX) and SPS;transmit data during a first C-DRX On-Duration period, beginning data transmission after a first time delay relative to a beginning of the first C-DRX On-Duration period; andtransmit data during one or more respective C-DRX On-Duration periods subsequent to the first C-DRX On-Duration period, beginning each data transmission after a respective time delay relative to a beginning of the respective C-DRX On-Duration period, wherein the respective time delay is determined according to the adjusted SPS transmit periodicity and is different from the first time delay; wherein the first C-DRX On-Duration period and the one or more respective C-DRX On-Duration periods correspond to the SPS activation command.