公开(公告)号：DE69033402D1

公开(公告)日：2000-01-27

申请号：DE69033402

申请日：1990-11-05

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN ,  PADOVANI ROBERTO ,  WHEATLEY CHARLES

IPC: H04B1/707 ,  H04W36/18 ,  H04B7/14 ,  H04Q9/00 ,  H04B1/00

Abstract: In a cellular telephone system a system for directing communications between a mobile user and cell-sites as a mobile user changes cell-site service areas. The mobile user includes an apparatus for, while in communication with another system user via one cell-site, determining a transition of the mobile user from the cell-site service area to the service area of another cell-site. The system includes circuitry responsive to the indication for coupling communications between the mobile user and the other system user via the new cell-site while the mobile user also remains in communication with the system user via the first cell-site. The system further includes apparatus responsive to the coupling of the communications between the mobile user and the other system user via the new cell-site for terminating the communications between the mobile user and another system user via cell-site with communications continuing between the mobile user and the system user via the new cell-site.

公开(公告)号：NO995079D0

公开(公告)日：1999-10-18

申请号：NO995079

申请日：1999-10-18

Applicant: QUALCOMM INC

Inventor： BENDER PAUL E ,  PADOVANI ROBERTO

IPC: H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04L1/00 ,  H04W36/08 ,  H04W36/18 ,  H04W36/30 ,  H04W52/00 ,  H04W52/24 ,  H04W52/40 ,  H04W52/44 ,  H04W52/58 ,  H04W52/60 ,  H04W56/00 ,  H04W68/00 ,  H04B

Abstract: A system and method is taught for controlling the power level of transmissions within a communication system having a base station, a mobile station, a communication channel, and a pilot channel. The mobile station determines a signal strength value according to a communication signal received by way of the communication channel. A pilot channel signal is determined according to a pilot signal transmitted by way of the pilot channel. The signal to noise ratio of the communication signal is determined according to the determined signal strength value and the pilot channel signal. The power level of a transmission is controlled according to the signal to noise ratio. The noise level in a communication channel within the communication system is estimated. The pilot channel signal includes pilot energy and pilot noise components. The pilot energy component is removed to provide a remaining pilot signal. Communication system operations are controlled according to the remaining pilot signal. The power levels of transmissions are controlled by determining the signal to noise ratio of a signal within the communication channel and determining a difference signal. The difference signal is formed by determining the difference between determined and desired signal to noise ratios. The difference signal is transmitted between the base station and the mobile station. The pilot channel has at least one frame and the power control signal is inserted into the frame. Thus, information representing the strength of the communication signal is transmitted to the base by way of the pilot channel within the frame. The pilot channel can have two information frames for transmitting the power control signal a plurality of times.

公开(公告)号：HK1015210A1

公开(公告)日：1999-10-08

申请号：HK98116169

申请日：1998-12-28

Applicant: QUALCOMM INC

Inventor： BLAKENEY ROBERT D II ,  WEAVER LINDSAY A JR ,  ZIV NOAM A ,  WILLIAMSON PAUL T ,  PADOVANI ROBERTO

IPC: H04B1/7087 ,  H04B1/7117 ,  H04B7/08 ,  H04B7/26 ,  H04J

Abstract: In a receiver having a plurality of demodulation elements, a method of assigning the plurality of demodulation element so a set of available signals. A first method emphasizes diversity of transmitting devices so that power control is optimal. A second method emphasizes the maximum signal strength available to produce aggregate maximum signal strength. Both methods control the number of reassignments so that excessive data is not lost during the reassignment process. The apparatus comprises the plurality of demodulation elements, at least one searcher element, and a controller.

公开(公告)号：FI19991648A

公开(公告)日：1999-09-29

申请号：FI19991648

申请日：1999-07-26

Applicant: QUALCOMM INC

Inventor： QUICK ROY F ,  PADOVANI ROBERTO

IPC: H04W36/18 ,  H04B7/26 ,  H04W48/20 ,  H04J

Abstract: A method and apparatus for providing soft handoff in a mobile communication system. In current systems is that the members of active set are determined in accordance with comparisons of measured pilot energy with fixed thresholds. However, the value of providing a redundant communication link to a mobile station depends strongly on the energy of other signals being provided to the mobile station. In the present invention, the signal strengths of other base stations in communication with a mobile station are considered when determining whether adding a base to that set of base stations in communication with the remote station is of sufficient value to justify the impact on system capacity.

公开(公告)号：NO993649L

公开(公告)日：1999-09-24

申请号：NO993649

申请日：1999-07-27

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO ,  QUICK ROY F

IPC: H04W36/18 ,  H04B7/26 ,  H04W48/20 ,  H04J13/00 ,  H04Q7/38

Abstract: A method and apparatus for providing soft handoff in a mobile communication system. In current systems is that the members of active set are determined in accordance with comparisons of measured pilot energy with fixed thresholds. However, the value of providing a redundant communication link to a mobile station depends strongly on the energy of other signals being provided to the mobile station. In the present invention, the signal strengths of other base stations in communication with a mobile station are considered when determining whether adding a base to that set of base stations in communication with the remote station is of sufficient value to justify the impact on system capacity.

公开(公告)号：ZA9804231B

公开(公告)日：1999-07-22

申请号：ZA9804231

申请日：1998-05-19

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO

IPC: H04W24/00 ,  H04W24/02 ,  H04L ,  G06F ,  H04Q

CPC classification number: H04W24/02 ,  H04W24/00

公开(公告)号：MY110833A

公开(公告)日：1999-05-31

申请号：MYPI19940100

申请日：1994-01-14

Applicant: QUALCOMM INC

Inventor： WHEATLEY III CHARLES E ,  GILHOUSEN KLEIN S ,  PADOVANI ROBERTO

IPC: H04B7/204 ,  H04L27/30 ,  H04J13/00

Abstract: A POWER CONTROL SYSTEM FOR A CELLULAR MOBILE TELEPHONE SYSTEM IN WHICH SYSTEM USERS (16, 18) COMMUNICATE INFORMATION SIGNALS BETWEEN ONE ANOTHER VIA AT LEAST ONE CELL SITE (12, 14) USING CODE DIVISION MULTIPLE ACCESS SPREAD SPECTRUM COMMUNICATION SIGNALS. THE POWER CONTROL SYSTEM CONTROLS TRANSMISSION SIGNAL POWER FOR EACH CELLULAR MOBILE TELEPHONE IN THE CELLULAR MOBILE TELEPHONE SYSTEM WHEREIN EACH CELLULAR MOBILE TELEPHONE HAS AN ANTENNA (70), TRANSMITTER (84) AND RECEIVER (72, 74) AND EACH CELL-SITE ALSO HAS AN ANTENNA (52), TRANSMITTER (62) AND RECEIVER (54, 56) .CELL-SITE TRANSMITTED SIGNAL POWER IS MEASURED AS RECEIVED AT THE MOBILE UNIT.TRANSMITTER POWER IS ADJUSTED (76, 80) AT THE MOBILE UNIT AN IN OPPOSITE MANER WITH RESPECT TO INCREASE AND DECREASES IN RECEIVED SIGNAL POWER. A POWER CONTROL FEEDBACK SCHEME MAY ALSO BE UTILIZED. AT THE CELL-SITE COMMUNICATING WITH THE MOBILE UNIT, THE MOBILE UNIT TRANSMITTED POWER IS MEASURED (60) AS RECEIVED AT THE CELL-SITE. A COMMAND SIGNAL IS GENERATED AT THE CELL-SITE AND TRANSMITTED TO THE MOBILE UNIT FOR FURTHER ADJUSTING MOBILE UNIT TRANSMITTER POWER CORRESPONDING TO DEVIATIONS IN THE CELL SITE RECEIVED SIGNAL POWER. THE FEEDBACK SCHEME IS USED TO FURTHER ADJUST THE MOBILE UNIT TRANSMITTER POWER SO THAT MOBILE UNIT TRANSMITTED SIGNALS ARRIVE AT THE CELL-SITE AT A DESIRED POWER LEVEL. (FIG. 6)

公开(公告)号：EA000310B1

公开(公告)日：1999-04-29

申请号：EA199800064

申请日：1996-06-17

Applicant: QUALCOMM INC

Inventor： ZIV NOAM ABRAHAM ,  PADOVANI ROBERTO

IPC: H04J13/04 ,  H04B7/005 ,  H04B17/00 ,  H04L1/00 ,  H04B7/26

公开(公告)号：NO990555D0

公开(公告)日：1999-02-05

申请号：NO990555

申请日：1999-02-05

Applicant: QUALCOMM INC

Inventor： PADOVANI ROBERTO

IPC: H04W36/14 ,  H04W36/18 ,  H04Q

Abstract: In a communications network, a network user communicates through a remote unit via at least one base station. The communications network includes a first mobile switching center for controlling communications through a first set of base stations and a second mobile switching center for controlling communications through a second set of base stations. The network also includes a service providing base station controlled by the first mobile switching center and providing service to a first transition coverage area using a first pseudorandom noise code. The first transition coverage area defines a boundary between a first system controlled by the first mobile switching center and a second system controlled by the second mobile switching center. The network further includes a passage providing base station controlled by the second mobile switching center for providing service to the first transition area using a second pseudorandom noise code offset in time by a first amount from the first pseudorandom noise code. The passage providing base station provides service to a remote unit only if the remote unit is entering the first transition coverage area while exiting the second system or is about to exit the first transition coverage area while entering the second system.

公开(公告)号：SG52653A1

公开(公告)日：1998-09-28

申请号：SG1996007380

申请日：1994-10-28

Applicant: QUALCOMM INC

Inventor： GILHOUSEN KLEIN S ,  PADOVANI ROBERTO

IPC: H04B7/005 ,  H04B7/04 ,  H04W16/24 ,  H04W36/06 ,  H04W36/18 ,  H04W52/34 ,  H04W52/40 ,  H04Q7/38

Abstract: A plurality of methods for achieving the softer handoff process such that the performance of a system is improved. A first method is based on delaying the softer handoff process. A second method is based on reducing the power of transmissions from the sector having the weakest signal strength. A third method is based on eliminating transmissions from the sector having the weakest signal strength. In all three methods, reverse link demodulation in each sector may continue with or without the transmission of the forward link. In all three methods the operation could be based on the signal strength of the reverse link signal or the forward link. It is also possible to combine two or more of these methods to create a hybrid method.