公开(公告)号：CA2331799A1

公开(公告)日：1999-11-11

申请号：CA2331799

申请日：1999-04-30

Applicant: QUALCOMM INC

Inventor： GLAUSER OLIVIER ,  CHEN TAO ,  SAINTS KEITH W ,  TIEDEMANN EDWARD G JR

IPC: H04L12/00 ,  H04W36/14 ,  H04W36/38 ,  H04Q7/38

Abstract: A method and apparatus for coordinating the time at which a mobile station ( 5) performs searches for alternative systems to which a hard handoff will occur . In one system which includes the present invention, the mobile station (5) receives a command which instructs the mobile station (5) as to when to tune to alternative frequencies in order to search for indications of the presenc e of an alternative system. In another system which includes the present invention, predetermined times are defined with respect to a reference point in time that is common to both an origination base station (10) and a mobile station (5). The mobile station (5) tunes to alternative frequencies to perform searches only during these predetermined times. In addition, the mobile station (5) coordinates the transmission of reports which indicate th e results of searches for alternative systems such that these reports are only transmitted from the mobile station (5) when the mobile station (5) is tuned to the origination frequency.

公开(公告)号：NO992391A

公开(公告)日：1999-06-09

申请号：NO992391

申请日：1999-05-19

Applicant: QUALCOMM INC

Inventor： SAINTS KEITH W ,  CHEN TAO

IPC: H04B7/005 ,  H04B7/26

CPC classification number: H04W52/223 ,  H04W52/08 ,  H04W52/12 ,  H04W52/20 ,  H04W52/221

公开(公告)号：NO992391D0

公开(公告)日：1999-05-19

申请号：NO992391

申请日：1999-05-19

Applicant: QUALCOMM INC

Inventor： SAINTS KEITH W ,  CHEN TAO

IPC: H04B7/005 ,  H04B7/26

Abstract: The present invention provides a method and apparatus for providing improved quality or power control by recognizing the delays inherent in a closed-loop communication system. The mobile station or receiver properly adjusts its forward link quality or power level thresholds or measurements with which it compares incoming frames or portions thereof to reflect the level it anticipates receiving (after the delay). For example, the mobile station can recognize that at a given measurement time, two outstanding messages have not been executed by the transmitter (where each message indicates a corresponding increase of 1 dB). As a result, the mobile station can adjust its measurement threshold down by 2 dB to more closely correspond to future power adjustments. If the currently received frame or portion thereof is still below the readjusted threshold, then the mobile station sends out a new message to request a further increase in the forward link channel.

公开(公告)号：NO991497D0

公开(公告)日：1999-03-26

申请号：NO991497

申请日：1999-03-26

Applicant: QUALCOMM INC

Inventor： SAINTS KEITH W

IPC: H04B7/00 ,  H04B7/005 ,  H04B7/26 ,  H04B17/00 ,  H04B

Abstract: The present invention is a method and apparatus for providing a received signal quality metric which is optimally designed to control the transmission power of a transmitter in a closed loop power control system. The present invention is described in the context of a spread spectrum communication system but it is equally applicable to other types of communication systems. In the present invention, the power control system is described for controlling the power of transmissions from a base station to a mobile station, referred to as forward link transmissions.

公开(公告)号：AU7099498A

公开(公告)日：1998-11-24

申请号：AU7099498

申请日：1998-04-16

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  SAINTS KEITH W

IPC: C08L23/04 ,  C08L23/06 ,  C08L23/08 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16 ,  H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04W52/08 ,  H04W52/24 ,  H04W52/40

Abstract: A forward link power control mechanism in a remote station (6) measures reverse link power control bits which are transmitted by one or more base stations (4a, 4b, 4n) on a forward traffic channel (10a). At the remote station (6) the reverse link power control bits from multiple base stations (4a, 4b, 4n) or multiple signal paths are measured, combined, and filtered to yield an improved measurement of the forward link signal quality. The reverse link (12a, 12b) power control bits which are deemed unreliable are omitted from use in the power control loop. The remote station (6) generates a set of forward link power control bits in accordance with the measurements and transmits these bits to all base stations (4a, 4b, 4n) in communication with the remote station (6). Each base station (4a, 4b, 4n) adjusts its gain of the forward traffic channel (10a) in accordance to its measurement of the forward link power control bit. The gains of the forward traffic channels (10a) of the base stations (4a, 4b, 4n) are corrected periodically so that erroneous reception of the forward link power control bits by the base stations do not accumulate.

公开(公告)号：ZA983400B

公开(公告)日：1998-10-27

申请号：ZA983400

申请日：1998-04-22

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  SAINTS KEITH W

IPC: C08L23/04 ,  C08L23/06 ,  C08L23/08 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16 ,  H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04W52/08 ,  H04W52/24 ,  H04W52/40 ,  H04B ,  H04L ,  H04Q

Abstract: A forward link power control mechanism in a remote station (6) measures reverse link power control bits which are transmitted by one or more base stations (4a, 4b, 4n) on a forward traffic channel (10a). At the remote station (6) the reverse link power control bits from multiple base stations (4a, 4b, 4n) or multiple signal paths are measured, combined, and filtered to yield an improved measurement of the forward link signal quality. The reverse link (12a, 12b) power control bits which are deemed unreliable are omitted from use in the power control loop. The remote station (6) generates a set of forward link power control bits in accordance with the measurements and transmits these bits to all base stations (4a, 4b, 4n) in communication with the remote station (6). Each base station (4a, 4b, 4n) adjusts its gain of the forward traffic channel (10a) in accordance to its measurement of the forward link power control bit. The gains of the forward traffic channels (10a) of the base stations (4a, 4b, 4n) are corrected periodically so that erroneous reception of the forward link power control bits by the base stations do not accumulate.

公开(公告)号：AU5155598A

公开(公告)日：1998-05-22

申请号：AU5155598

申请日：1997-10-27

Applicant: QUALCOMM INC

Inventor： SAINTS KEITH W ,  TIEDEMANN EDWARD G JR

IPC: H04B1/16 ,  H04B7/26 ,  H04L1/08 ,  H04L25/02 ,  H04Q7/38

Abstract: A system and method for determining the transmission rate of a data signal at a receiver of a variable rate communications system. A vocoder at a transmitter encodes a frame of data into symbols according to one of a set of discrete data rates. When the data rate is lower than the maximum, each symbol is repeated a number of times as required to achieve a constant number of symbols in each frame. The data signal is transmitted at a power proportional to the data rate of the frame. A reference signal is also transmitted. The reference signal is transmitted at a constant power. Further, the data signal has the same carrier frequency as a reference signal so that they exhibit the same fading characteristics as they are transmitted through the channel. At a receiver, the power of the data signal and the power of reference signal are measured as received. The ratio of the power of the data signal to the power of the reference signal is compared with a predetermined ratio of the power of a maximum rate data signal to the power of the reference signal. The result of the comparison will indicate the encoded data rate of the received frame of data. The rate determined by the rate determination system is then used to properly decode the frame of data. A vocoder at the receiver further processes the data for interface with the user.

公开(公告)号：CA2269028A1

公开(公告)日：1998-05-07

申请号：CA2269028

申请日：1997-10-27

Applicant: QUALCOMM INC

Inventor： SAINTS KEITH W ,  TIEDEMANN EDWARD G JR

IPC: H04B1/16 ,  H04B7/26 ,  H04L1/08 ,  H04L25/02 ,  H04Q7/38

Abstract: A system and method for determining the transmission rate of a data signal at a receiver of a variable rate communications system. A vocoder at a transmitter encodes a frame of data into symbols according to one of a set of discrete data rates. When the data rate is lower than the maximum, each symbol is repeated a number of times as required to achieve a constant number of symbols in each frame. The data signal is transmitted at a power proportional to the data rate of the frame. A reference signal is also transmitted. The reference signal is transmitted at a constant power. Further, the data signal has the same carrier frequency as a reference signal so that they exhibit the same fading characteristics as they are transmitted through the channel. At a receiver, the power of the reference signal is measured by the pilot measurement element (36) and the power of the data signal is measured by the traffic power measurement element (38). The rate processor (46) dtermines the ratio of the power of the data signal to the power of the reference signal, and the measured ratio is compared with a predetermined ratio of the power of a maximum rate data signal to the power of the reference signal. The result of the comparison will indicate the encoded data rate of the received frame of data. The decoder (40) then uses the rate indicated by the comparison to properly decode the frame of data. A vocoder at the receiver further processes the data for interface with the user.

公开(公告)号：ES2312092T3

公开(公告)日：2009-02-16

申请号：ES06118763

申请日：1998-04-16

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  SAINTS KEITH W

IPC: C08L23/04 ,  H04B7/005 ,  C08L23/06 ,  C08L23/08 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16 ,  H04B1/04 ,  H04B7/26 ,  H04W52/08 ,  H04W52/24 ,  H04W52/40

Abstract: Una estación remota (6) para su uso en un sistema de comunicaciones sin hilos que comprende una o más estaciones base (4) y una o más estaciones remotas (6), caracterizada porque la estación remota (6) comprende: un receptor (106) para recibir al menos una señal de comunicaciones incluyendo una señal de control de la potencia transmitida por una estación base (4) en un primer canal de transmisión; un procesador (120) para procesar la al menos una señal recibida por el receptor (106) para derivar un atributo de la al menos una señal recibida por el receptor (106) de las señales de control de la potencia; y un transmisor (136) para transmitir, a una potencia de transmisión determinada por la señal de control de la potencia recibida, señales de control de la potencia de transmisión para la estación base (4) en un segundo canal de transmisión, las mencionadas señales transmitidas en el mencionado segundo canal de transmisión representan el atributo de la señal de comunicaciones recibida.

公开(公告)号：AT406709T

公开(公告)日：2008-09-15

申请号：AT06118763

申请日：1998-04-16

Applicant: QUALCOMM INC

Inventor： TIEDEMANN EDWARD G JR ,  SAINTS KEITH W

IPC: H04B7/005 ,  C08L23/04 ,  C08L23/06 ,  C08L23/08 ,  C08L23/10 ,  C08L23/12 ,  C08L23/16 ,  H04B1/04 ,  H04B7/26 ,  H04W52/08 ,  H04W52/24 ,  H04W52/40

Abstract: A forward link power control mechanism in a remote station (6) measures reverse link power control bits which are transmitted by one or more base stations (4a, 4b, 4n) on a forward traffic channel (10a). At the remote station (6) the reverse link power control bits from multiple base stations (4a, 4b, 4n) or multiple signal paths are measured, combined, and filtered to yield an improved measurement of the forward link signal quality. The reverse link (12a, 12b) power control bits which are deemed unreliable are omitted from use in the power control loop. The remote station (6) generates a set of forward link power control bits in accordance with the measurements and transmits these bits to all base stations (4a, 4b, 4n) in communication with the remote station (6). Each base station (4a, 4b, 4n) adjusts its gain of the forward traffic channel (10a) in accordance to its measurement of the forward link power control bit. The gains of the forward traffic channels (10a) of the base stations (4a, 4b, 4n) are corrected periodically so that erroneous reception of the forward link power control bits by the base stations do not accumulate.