Title :
A hybrid ARQ scheme with power ramping
Author :
Hwang, Seung-Hoon ; Kim, Bonghoe ; Kim, Young-Sam
Author_Institution :
ATRA Dept, LG Electron., Ltd, Kyungki-do, South Korea
fDate :
6/23/1905 12:00:00 AM
Abstract :
We propose and analyze a scheme for wireless channels, which is a combination of a hybrid type I automatic repeat request (ARQ) scheme and a power ramping. In the hybrid type I ARQ scheme, the same redundancy bits for error correction is transmitted repeatedly when a negative acknowledgment (NAK) is obtained. In addition to the ARQ scheme, the power ramping is considered for more reliable downlink data transmission, in which the transmission power is gradually changed from a small level to large levels when the number of retransmission increases. This is done without any knowledge of the channels at the transmitter. Simulation results show that by applying the combined hybrid ARQ and power ramping scheme with properly selected parameters, it has a throughput advantage of 3-5%
Keywords :
automatic repeat request; cellular radio; code division multiple access; data communication; digital simulation; forward error correction; multiuser channels; radio links; spread spectrum communication; telecommunication channels; DS-CDMA system; FEC; cellular communication systems; forward error correction; hybrid type I ARQ; hybrid type I automatic repeat request; negative acknowledgment; power ramping; redundancy bits; reliable downlink data transmission; simulation results; throughput; wireless channels; Automatic repeat request; Communication system traffic; Data communication; Error correction; Forward error correction; Interference; Protocols; Quality of service; Redundancy; Throughput;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.956464
