Title:
DISCONTINUOUS TRANSMISSION (DTX) FRAME DETECTION IN WIRELESS COMMUNICATION SYSTEMS
Document Type and Number:
WIPO Patent Application WO2004054311
Kind Code:
A3
Abstract:
Techniques to detect for DTX frames in a "primary" transmission that may be sent in a non-continuous manner using a "secondary" transmission that is sent during periods of no transmission for the primary transmission. The primary and secondary transmissions may be the ones sent on the F-DCCH and Forward Power Control Subchannel, respectively, in an IS-2000 system. In one method, a determination is first made whether or not a frame received for the primary transmission in a particular frame interval is a good frame (e.g., based on CRC). If the received frame is not a good frame, then a determination is next made whether the received frame is a DTX frame or an erased frame based on a number of metrics determined for the primary and secondary transmissions. The metrics may include symbol error rate of the received frame, secondary transmission (e.g., PC bit) energy, and received frame energy.
Inventors:
CHEN QINGXIN
PATEL SHIMMAN
PATEL SHIMMAN
Application Number:
PCT/US2003/039497
Publication Date:
August 26, 2004
Filing Date:
December 10, 2003
Export Citation:
Assignee:
QUALCOMM INC (US)
International Classes:
H04L1/20; H04W24/02; H04L1/00; (IPC1-7): H04Q7/38
Domestic Patent References:
| WO2001001610A1 | 2001-01-04 | |||
| WO2002003588A2 | 2002-01-10 |
Foreign References:
| US6370392B1 | 2002-04-09 |
Other References:
YIPING WANG ET AL: "Power control methods for dedicated control channels during discontinuous transmission in IS-2000 systems", IEEE INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR AND MOBILE RADIO, vol. 1, 18 September 2000 (2000-09-18), pages 271 - 275, XP010520645
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