公开(公告)号：EP0900510A2

公开(公告)日：1999-03-10

申请号：EP97926666.0

申请日：1997-05-22

申请人： QUALCOMM INCORPORATED

发明人： WEAVER, Lindsay, A., Jr. ,  HOLCMAN, Toni, L. ,  MUNSINGER, David, B. ,  ZIV, Noam, A. ,  BAKER, Kenneth, R.

IPC分类号： H04J13 ,  H04W24 ,  H04W36

CPC分类号： H04W36/32 ,  H04W36/0083

摘要： In a communications network, a network user communicates using a remote unit (125) with another user (30) via at least one base station (B1A). The network is comprised of first (MSC-I) and second (MSC-II) mobile switching control stations respectively controlling communications through a first set of base stations (B1A-B1E) including a first base station (B1A) and through a second set of base stations (B2A-B2E) including a second base station (B2A). To direct communications between the remote unit (125) and the first (B1A) and second base stations (B2A) the first base station (B1A) measures a round trip delay of an active communication signal between the first base station (B1A) and the remote unit (125). The remote unit (125) measures a first phase offset of a pilot signal received from a first candidate base station (B1A) and reports it to the first mobile switching center (MSC-I) via the first base station (B1A). The first mobile switching center (MSC-I) calculates a candidate round trip delay between the remote unit (125) and the first candidate base station (B1A) based on the first phase offset and the round trip delay of the active communication signal. An active communication control unit accesses a measurement directed hard handoff table to determine a location of the remote unit based on the round trip delay corresponding to the first active communication signal and the candidate round trip delay.

公开(公告)号：EP1034683A1

公开(公告)日：2000-09-13

申请号：EP98960489.7

申请日：1998-11-25

申请人： QUALCOMM Incorporated

发明人： BAKER, Kenneth, R.

IPC分类号： H04Q7/38 ,  H04Q7/36

CPC分类号： H04W36/30 ,  H04B7/2606 ,  H04W16/26

摘要： A method and apparatus for providing handoff between two communication systems. The systems can be CDMA systems operating at different frequencies or systems employing different technologies. In the first system, a base station (4) is configured to provide communications to two or more sectors, with at least one sector assigned to a corresponding repeater (8) which provides coverage overlapping that of both systems. As the remote station (6) moves into the coverage area of the repeater (8), the pilot signal of the repeater (8) is identified, measured and sent to the first system. If the measured pilot signal is above a predetermined add threshold, the repeater (8) is added to the active set of the remote station. The first system can handoff the remote station (6) to the second system: (1) upon initiation of a soft handoff by the base station of the first system; (2) if the pilot signal strength of the repeater (8), as measured by the remote station (6), exceeds a predetermined handoff threshold; (3) if the base station (4) of the first system is dropped from the active set of the remote station (6); (4) if the repeater of the first system is dropped from the active set of the remote station (6); or (5) if the base station (4) and repeater (8) of the first system are dropped from the active set of the remote station (6).

公开(公告)号：EP1021872A1

公开(公告)日：2000-07-26

申请号：EP98949598.1

申请日：1998-09-29

申请人： QUALCOMM Incorporated

发明人： BAKER, Kenneth, R.

IPC分类号： H04B7/10 ,  H04B7/26

CPC分类号： H04B7/10

摘要： The present invention is a novel and improved method and apparatus for transmitting and receiving code division multiple access (CDMA) signals. In a described embodiment of the invention, the radio frequency (RF) signals (60) are received through a first polarization RF unit (52a) and a second polarization RF unit (52b) generating right slant samples (60) and left slant samples (62). The right slant samples (60) and the left slant samples (62) are each searched and multipath processed independently and the resulting sets of soft decision data combined and decoded. In a preferred embodiment of the invention, right slant and left slant instances (60, 62) of the signal may be generated and transmitted to increase the likelihood of differently polarized instances of the signal being available at the receive system.

公开(公告)号：EP1470669B1

公开(公告)日：2010-10-06

申请号：EP03705685.0

申请日：2003-01-07

申请人： QUALCOMM INCORPORATED

发明人： BAKER, Kenneth, R. ,  BUTLER, Brian, K. ,  WHEATLEY, Charles, E., III

IPC分类号： H04L12/26

CPC分类号： H04L43/0876 ,  H04B7/15528 ,  H04L43/045 ,  H04L43/0847 ,  H04W24/00

摘要： An apparatus and method for identifying remote communications transmitted via a repeater from remote communications not transmitted via the repeater. The method comprises the steps of receiving a plurality of signal transmissions originating from a plurality of remote stations, wherein each of the signal transmissions is associated with a call originating from one of the plurality of remote stations; processing the plurality of received signal transmissions to identify received transmissions that include a discriminant applied by a repeater; and designating each of the plurality of received signal transmissions as being transmitted via the repeater if the received signal transmission includes the discriminant.

公开(公告)号：EP1582014A1

公开(公告)日：2005-10-05

申请号：EP03790385.3

申请日：2003-12-04

申请人： Qualcomm, Incorporated

发明人： BAKER, Kenneth, R. ,  WHEATLEY, Charles, E., III

IPC分类号： H04B7/185 ,  H04B7/15

CPC分类号： H04B7/15535 ,  H04B7/2603 ,  H04B7/2606 ,  H04W52/46

摘要： A method and apparatus are disclosed for setting total reverse link gain between a repeater and a base station (104). The method and apparatus generally comprise setting total reverse link gain (800) between a repeater and a base station comprises determining an operating point for the repeater; establishing a reverse communication link between the base station and a transceiver device within a coverage area of the repeater; determining if an increase in a reverse link gain is substantially equal to an increase in a noise figure of the base station, using a transmit power of the transceiver device; and adjusting the reverse link gain by an amount based on the operating point and based on a difference in reverse link gain values, if the increase in the reverse link gain is substantially equal to the increase in the noise figure of the base station, to set the total reverse link gain.

公开(公告)号：EP1470669A1

公开(公告)日：2004-10-27

申请号：EP03705685.0

申请日：2003-01-07

申请人： QUALCOMM Incorporated

发明人： BAKER, Kenneth, R. ,  BUTLER, Brian, K. ,  WHEATLEY, Charles, E., III

IPC分类号： H04L12/26

CPC分类号： H04L43/0876 ,  H04B7/15528 ,  H04L43/045 ,  H04L43/0847 ,  H04W24/00

摘要： An apparatus and method for identifying remote communications transmitted via a repeater from remote communications not transmitted via the repeater. The method comprises the steps of receiving a plurality of signal transmissions originating from a plurality of remote stations, wherein each of the signal transmissions is associated with a call originating from one of the plurality of remote stations; processing the plurality of received signal transmissions to identify received transmissions that include a discriminant applied by a repeater; and designating each of the plurality of received signal transmissions as being transmitted via the repeater if the received signal transmission includes the discriminant.

公开(公告)号：EP1021872B1

公开(公告)日：2004-04-14

申请号：EP98949598.1

申请日：1998-09-29

申请人： QUALCOMM INCORPORATED

发明人： BAKER, Kenneth, R.

IPC分类号： H04B7/10 ,  H04B7/26

CPC分类号： H04B7/10

摘要： The present invention is a novel and improved method and apparatus for transmitting and receiving code division multiple access (CDMA) signals. In a described embodiment of the invention, the radio frequency (RF) signals (60) are received through a first polarization RF unit (52a) and a second polarization RF unit (52b) generating right slant samples (60) and left slant samples (62). The right slant samples (60) and the left slant samples (62) are each searched and multipath processed independently and the resulting sets of soft decision data combined and decoded. In a preferred embodiment of the invention, right slant and left slant instances (60, 62) of the signal may be generated and transmitted to increase the likelihood of differently polarized instances of the signal being available at the receive system.