| US 7,492,699 B2 | ||
| Method of reducing feedback channel state information within adaptive OFDMA system and adaptive OFDMA system using the same | ||
| Myeongyun Cho, Seongnam-si (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd, (Korea, Republic of) | ||
| Appl. No. 10/545,047 PCT Filed Feb. 09, 2004, PCT No. PCT/KR2004/000247 § 371(c)(1), (2), (4) Date Aug. 11, 2005, PCT Pub. No. WO2004/073200, PCT Pub. Date Aug. 26, 2004. |
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| Claims priority of application No. 10-2003-0008461 (KR), filed on Feb. 11, 2003. | ||
| Prior Publication US 2006/0153060 A1, Jul. 13, 2006 | ||
| Int. Cl. H04J 11/00 (2006.01) | ||
| U.S. Cl. 370—203 [370/343] | 28 Claims |
| 1. A method of reducing channel state information fed back in an adaptive orthogonal frequency division multiple access system
when transmitting and receiving data packets between a base station and a mobile station using an orthogonal frequency division
multiplexing method comprising adaptive modulation and coding, the method comprising:
transmitting a data packet comprising information as to whether adaptive modulation and coding is on or off from the base
station to the mobile station via a downlink; and
tracking a modulation and coding scheme level only when it is determined that adaptive modulation and coding is performed
based on the information as to whether adaptive modulation and coding is on or off and feeding back the channel state information
obtained from a tracking result from the mobile station to the base station via an uplink.
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