公开(公告)号：CA2311623A1

公开(公告)日：1999-06-03

申请号：CA2311623

申请日：1998-11-25

Applicant: QUALCOMM INC

Inventor： BAKER KENNETH R

IPC: H04B7/26 ,  H04W16/26 ,  H04W36/14 ,  H04Q7/38 ,  H04Q7/36

Abstract: 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：AU9589098A

公开(公告)日：1999-04-23

申请号：AU9589098

申请日：1998-09-29

Applicant: QUALCOMM INC

Inventor： BAKER KENNETH R

IPC: H04B7/10 ,  H04B7/24 ,  H04B7/26

Abstract: 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 are received through a first polarization RF unit and a second polarization RF unit generating right slant samples and left slant samples. The right slant samples and the left slant samples 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 of the signal are 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：WO9744970A2

公开(公告)日：1997-11-27

申请号：PCT/US9708677

申请日：1997-05-22

Applicant: QUALCOMM INC

Inventor： WEAVER LINDSAY A JR ,  HOLCMAN TONI L ,  MUNSINGER DAVID B ,  ZIV NOAM A ,  BAKER KENNETH R

IPC: H04W24/02 ,  H04W36/12 ,  H04W36/14 ,  H04Q7/22 ,  H04Q7/38

CPC classification number: H04W36/32 ,  H04W36/0083

Abstract: 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.

Abstract translation: 在通信网络中，网络用户经由至少一个基站（B1A）使用远程单元（125）与另一用户（30）进行通信。 网络由第一（MSC-I）和第二（MSC-II）移动交换控制站组成，分别通过包括第一基站（B1A）的第一组基站（B1A-B1E）和通过第二组 包括第二基站（B2A）的基站（B2A-B2E）。 为了引导远程单元（125）与第一（B1A）和第二基站（B2A）之间的通信，第一基站（B1A）测量第一基站（B1A）和第二基站（B1A）之间的活动通信信号的往返延迟 远程单元（125）。 远程单元（125）测量从第一候选基站（B1A）接收的导频信号的第一相位偏移，并经由第一基站（B1A）将其报告给第一移动交换中心（MSC-1）。 第一移动交换中心（MSC-I）基于主动通信信号的第一相位偏移和往返延迟来计算远程单元（125）和第一候选基站（B1A）之间的候选往返延迟。 主动通信控制单元基于与第一主动通信信号和候选往返延迟相对应的往返延迟来访问测量导向硬切换表以确定远程单元的位置。

公开(公告)号：EP1733569A4

公开(公告)日：2009-12-16

申请号：EP04750874

申请日：2004-04-30

Applicant: QUALCOMM INC

Inventor： BAKER KENNETH R ,  WHEATLEY CHARLES E III ,  WILLIS DAN ,  SHEYNBLAT LEONID

IPC: H04W36/08 ,  H04W52/46 ,  H04B7/155 ,  H04W8/00 ,  H04W16/26

CPC classification number: H04B7/155 ,  H04W16/26 ,  H04W36/0083 ,  H04W84/047

公开(公告)号：EP1623525A4

公开(公告)日：2008-07-02

申请号：EP04752206

申请日：2004-05-12

Applicant: QUALCOMM INC

Inventor： BAKER KENNETH R

IPC: H04B10/12 ,  H04B17/40 ,  H04W88/08

CPC classification number: H04W88/085 ,  H04B10/25753 ,  H04B10/25758 ,  H04B10/25759

Abstract: Apparatus and methods are disclosed for determining a tolerable propagation delay between a repeater and a base station in a communication system. In one embodiment, a tolerable length of fiber optic cable between a repeater and a base station is determined. More particularly, a desired search window size in time is determined. A maximum fiber optic cable delay value is determined based on the desired search window size. Also, a ratio value of fiber optic cable delay value to fiber optic cable length is then determined. The tolerable length of the fiber optic cable is then determined based on the maximum fiber optic cable delay value and the ratio value.