(12) United States Patent
Ahn et al.
(io) Patent No.: (45) Date of Patent:
US 7,143,330 B2 Nov. 28, 2006
(54) METHOD AND APPARATUS FOR
(75) Inventors: Joon Kui Ahn, Seoul (KR); Hyuck
Chan Kwon, Seoul (KR)
(73) Assignee: LG Electronics Inc., Seoul (KR)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 411 days.
(21) Appl. No.: 10/334,782
(22) Filed: Jan. 2, 2003
(65) Prior Publication Data
US 2003/0131299 Al Jul. 10, 2003
(30) Foreign Application Priority Data
Jan. 5, 2002 (KR) 10-2002-0000568
(51) Int. CI.
(52) U.S. CI 714/748
(58) Field of Classification Search 714/748,
714/749,776,750; 455/522; 370/342,347 See application file for complete search history.
(56) References Cited
U.S. PATENT DOCUMENTS
5,828,677 A 10/1998 Sayeed et al 371/41
5,946,320 A 8/1999 Decker 370/428
6,058,106 A 5/2000 Cudak et al 370/313
6,871,078 Bl * 3/2005 Nishioka et al 455/522
2003/0099211 Al* 5/2003 Moulsley et al 370/328
FOREIGN PATENT DOCUMENTS
WO WO 01/78291 A2 10/2001
Miickenheim, Jens, Kay Iversen and Dirk Hampicke, "Construction of High-Efficient Optical CDMA Computer Networks: Statistical Design," IEEE International Conference on Communications, Jun. 7, 1998, New York, NY pp. 1289-1293, XP010284599. Fontolliet, Pierre-Girard, "Telecommunication Systems," 1986, Artech House, Inc., Dedham, MA, p. 353, XP002231295. Perkins, Michael G., "Optimizing Signal Constellations for the Output of a Quantizer," Communications Technology for the 1990's and Beyond, Dallas, TX, IEEE Telecommunications Conference and Exhibition, New York, NY, Nov. 27, 1989, vol. 3, pp. 18951900, XP000091276.
* cited by examiner
Primary Examiner—James C Kerveros
(74) Attorney, Agent, or Firm—Fleshner & Kim, LLP
The present invention relates to a power controlling method in a mobile radio communication system using Automatic Repeat reQuest (ARQ) scheme, and more particularly to a power controlling method of response (ACK/NACK) signals for transmitting the ACK/NACK signals in different power based on the permissible probabilities of reception error that the system requires. When the ACK/NACK signals are transmitted and received in the automatic repeat request (ARQ) system, since the ACK/NACK signals can be transmitted in accordance with the transmission power satisfying an error rate required in each signal by differentiating the transmission power of the signal according to each ACK/NACK, the power consumption required in the transmission of the NACK signal can be reduced.
20 Claims, 3 Drawing Sheets