公开(公告)号：EP1782655A1

公开(公告)日：2007-05-09

申请号：EP05774742.0

申请日：2005-07-18

Applicant: Qualcomm Incorporated

Inventor： BLACK, Peter J.

IPC: H04Q7/38

CPC classification number: H04W72/005 ,  H04W36/18

Abstract: Embodiments described herein relate to providing variable rate broadcast services with soft handoff in wireless communications. In an embodiment, a plurality of access points (e.g., servicing various cells in a broadcast area) may transmit a broadcast content in accordance with a rate set. The rate set may include a plurality of distinct data rates each associated with a transmission format, configured to allow the broadcast packets transmitted by the access points to be incrementally combined (e.g., on a per-slot basis at a subscribing AT). The data rates and corresponding transmission formats in the rate set may be selected in relation to the supportable data rates of the cells in the broadcast area, as well as the requirements for supporting soft handoff in these cells.

公开(公告)号：EP1051872B9

公开(公告)日：2006-01-18

申请号：EP99904328.4

申请日：1999-01-26

Applicant: QUALCOMM INCORPORATED

Inventor： BLACK, Peter J.

IPC: H04Q7/38

CPC classification number: H04W36/0083 ,  H04W36/14 ,  H04W36/30

Abstract: A mobile station (5) is in communication with an origination base station (10) at a first frequency, f1. It is directed to search for pilot signals from a destination base station (20, 22), in preparation for a hard handoff to it, and to then return to the first frequency. The destination base station (20, 22) operates at a second frequency, f2. The mobile station (5) captures a brief sample of signals at the second frequency, and quickly returns to the first frequency. The sample is searched to determine if a handoff is possible. The search takes place, at least in part, after return to the first frequency. The quickness of return is rewarded with a reduction in erasures, which inevitably occur when the mobile station (5) is off the first frequency. The prior art waited until the search was complete before returning to the first frequency. It therefore suffered unnecessary erasures.

公开(公告)号：EP1488512A1

公开(公告)日：2004-12-22

申请号：EP03721474.9

申请日：2003-03-26

Applicant: QUALCOMM Incorporated

Inventor： BLACK, Peter J. ,  SINDHUSHAYANA, Nagabhushana ,  CHALLA, Raghu ,  SELTMANN, Kevin

IPC: H03G3/20 ,  H04B1/38

CPC classification number: H03G3/3036 ,  H03G3/3068

Abstract: Systems and techniques for gain control include amplifying a signal with an amplifier having a gain represented by one of a plurality of gain curves depending on a value of a parameter, the signal being amplified at a first one of the parameter values, and controlling the gain of the amplified signal from a predetermined gain curve relating to the gain curve of the amplifier for a second one of the parameter values by adjusting a gain control signal corresponding to a point on the predetermined gain curve as a function of the first one of the parameter values, and applying the adjusted gain control signal to the amplifier. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure.

公开(公告)号：EP1481495A1

公开(公告)日：2004-12-01

申请号：EP03744228.2

申请日：2003-03-04

Applicant: Qualcomm Incorporated

Inventor： SINDHUSHAYANA, Nagabhushana ,  BLACK, Peter J. ,  ATTAR, Rashid, A.

IPC: H04B7/005 ,  H04L1/00

CPC classification number: H04W52/26 ,  H04L1/0002 ,  H04L1/0021 ,  H04W52/223 ,  H04W52/24 ,  H04W52/265 ,  H04W52/267 ,  H04W52/34 ,  H04W52/367

Abstract: Methods and apparatus for estimating maximum rate of data and for estimating a transmission power required for transmission of a data with a rate of data in a communication system are disclosed. A terminal determines a quality metric of a communication link, over which data are to be transmitted, and modifies the determined quality metric by a quality metric margin. The terminal then estimates the maximum rate of data in accordance with the modified quality metric. Alternatively, the terminal then estimates transmission power required for transmission of a data with a rate of data in accordance with the rate of data and the modified quality metric. The quality metric margin may be pre-determined or dynamically adjusted. The terminal dynamically adjusts the quality metric margin in accordance with a result of comparison of a transmit power corresponding to the estimated maximum rate of data with an actual transmit power used to transmit the data.