Power Savings and QoS Impact for VoIP Application with DRX/DTX Feature in LTE

Author

Polignano, Michele ; Vinella, Dario ; Laselva, Daniela ; Wigard, Jeroen ; Sørensens, Troels B.

Author_Institution

Aalborg Univ., Aalborg, Denmark

fYear

2011

fDate

15-18 May 2011

Firstpage

1

Lastpage

5

Abstract

In the Long Term Evolution system Discontinuous Transmission and Reception (DRX/DTX) has been introduced to extend the terminal battery lifetime. In this paper, we study the energy-saving provided by this mechanism and the impact on the QoS performance of Voice over IP (VoIP) traffic under dynamic and semi persistent packet scheduling strategies. Simulations and analytical results show that the DRX/DTX scheme can reduce the terminal power consumption without compromising the required VoIP QoS in terms of maximum air-interface delay. However, it does not provide any further power savings if the terminal is asleep for a period longer than 20 ms. It is shown that the power savings are larger for semi persistent scheduling than for dynamic packet scheduling at the cost of a lower spectral efficiency.

Keywords

Internet telephony; Long Term Evolution; energy conservation; power consumption; quality of service; radio reception; DRX; DTX; LTE; QoS; VoIP; Voice over IP; discontinuous reception; discontinuous transmission; dynamic packet scheduling; long term evolution; power consumption; power savings; terminal battery lifetime; Analytical models; Delay; Downlink; Dynamic scheduling; Power demand; Quality of service; Scheduling algorithm;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Spring), 2011 IEEE 73rd

Conference_Location

Budapest

ISSN

1550-2252

Print_ISBN

978-1-4244-8332-7

Type

conf

DOI

10.1109/VETECS.2011.5956309

Filename

5956309