DocumentCode :
1632376
Title :
Uplink Power Control for Next Generation Mobile Broadband Wireless Access Systems: System-Level Simulation Results
Author :
Tee, Lai King ; Van Rensburg, Cornelius ; Tsai, Jiann-An ; Khan, Farooq
Author_Institution :
Wireless Solutions Lab., Samsung Telecommun. America, Richardson, TX
fYear :
2006
Firstpage :
1
Lastpage :
5
Abstract :
In uplink OFDM/A systems that support link adaptation, e.g., via adaptive modulation and coding (AMC), and/or HARQ schemes, there have been suggestions that fast, closed-loop power control (PC) may not be necessary. It might be sufficient to use open-loop, slow power control method as a countermeasure to the effects of slow fading, i.e., propagation path loss and shadow fading. Here we will compare the performance of uplink open-loop, closed-loop power control with a fixed SINR target or AMC, based on some simulation results. Although it is necessary to emphasize the high throughput aspect of the technology evolution, the support of various traffic types that require medium to low data rates, e.g., VoIP and video conferencing applications should not be overlooked. As transmission at high power often introduces additional interference to users in the other sectors or cells, and increases battery power consumption, the user terminal (UT) should only transmit at the minimum required power to support the data rate as required by the application. We will show that in a typical cellular environment, closed-loop power control can be used to limit the UT´s transmit power. This leads to a longer battery life and lower intercell interference.
Keywords :
OFDM modulation; broadband networks; cellular radio; closed loop systems; fading; frequency division multiple access; intercarrier interference; open loop systems; power control; radio access networks; telecommunication control; telecommunication traffic; battery power consumption; cellular environment; closed-loop power control; intercell interference reduction; link adaptation; next generation mobile broadband wireless access system; propagation path loss; shadow fading; traffic type; uplink OFDM/A system; uplink open-loop power control; user terminal; Adaptive control; Batteries; Fading; Interference; Modulation coding; OFDM modulation; Power control; Programmable control; Propagation losses; Signal to noise ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0062-7
Electronic_ISBN :
1-4244-0063-5
Type :
conf
DOI :
10.1109/VTCF.2006.226
Filename :
4109491
Link To Document :
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