公开(公告)号：EP1273198A1

公开(公告)日：2003-01-08

申请号：EP01926721.0

申请日：2001-04-05

Applicant: QUALCOMM INCORPORATED

Inventor： CHEN, Tao ,  JOU, Yu-Cheun

IPC: H04Q7/38

CPC classification number: H04W36/0072 ,  H04W36/14

Abstract: The present invention is directed to a digital wireless telecommunications system that includes a plurality of base station of differing spectral capabilities, and a plurality of remote stations capable of transmitting data to and receiving transmissions from the plurality of base stations. The invention herein provides a method for remote station hand-off between the base stations of a narrower spectral capacity and base stations of a wider spectral capacity. A method is provided for a wireless telecommunications infrastructure to facilitate a remote station hand-off from a set of narrowband compliant base stations to at least one wideband compliant base station while a remote station is in the coverage area of both types of base stations. Additionally, the invention herein provides remote station apparatus, base station apparatus, and base station controller apparatus for performing the handoff methodology of the present invention.

公开(公告)号：EP0974237A2

公开(公告)日：2000-01-26

申请号：EP98919748.8

申请日：1998-04-07

Applicant: QUALCOMM INCORPORATED

Inventor： TIEDEMANN, Edward, G., Jr. ,  CHEN, Tao ,  JOU, Yu-Cheun ,  LIN, Yu-Chuan

IPC: H04Q7/22 ,  H04Q7/38 ,  H04B7/26

CPC classification number: H04W72/1278 ,  H04L47/10 ,  H04L47/14 ,  H04L47/2433 ,  H04L47/30 ,  H04W28/22 ,  H04W36/02 ,  H04W36/18 ,  H04W52/12 ,  H04W52/367 ,  H04W72/1247 ,  H04W72/1252 ,  H04W72/1268

Abstract: A method of and apparatus for scheduling data transmissions in a communication network comprising at least one cell (2a to 2g) and at least one scheduled user (6a to 6e) improves utilization of the reverse link and decreases the transmission delay in data communication. The apparatus comprises a controller (92) for collecting status information for said communication network and for scheduling data transmissions from said at least one cell (2a to 2g) to said at least one scheduled user (6a to 6e). A memory (94) is connected to said controller for storing said status information, and a timer (96) is connected to provide timing signals to said controller (92). The timing signals enable said controller to perform scheduling of data transmission. Each remote station is assigned a maximum unscheduled transmission rate for the duration of the communication with a cell. A maximum scheduled transmission rate can be assigned by a channel scheduler (12) for scheduled transmission of data traffic at high rates. The maximum scheduled transmission rate is assigned in accordance with a set of system goals, a list of system constraints, and collected information on the status of the communication network. Data is partitioned in data frames and transmitted over the reverse link at or below the maximum scheduled transmission rate which have been assigned to the scheduled user.

公开(公告)号：EP0903051A1

公开(公告)日：1999-03-24

申请号：EP97928730.0

申请日：1997-05-28

Applicant: QUALCOMM INCORPORATED

Inventor： TIEDEMANN, Edward, G., Jr. ,  JOU, Yu-Cheun ,  ODENWALDER, Joseph, P.

IPC: H04J13 ,  H04B7 ,  H04L29 ,  H04W28

CPC classification number: H04W28/18

Abstract: The present invention is a method and apparatus for transmitting high rate data packet in a CDMA communication system. The transmission system transmits a first channel assignment message indicating the at least one additional channel that will be used to support the high rate data packet. The first channel assignment message is sent in advance of the onset of high rate data communications. In addition the present invention provides within the first frame of high rate data a duplicate channel assignment message. A remote receiver uses the channel assignment messages to initialize its demodulation elements (114 and 120) to receive the additional information carried on the at least one additional channel.

公开(公告)号：EP2443756A1

公开(公告)日：2012-04-25

申请号：EP10739421.5

申请日：2010-06-15

Applicant: QUALCOMM Incorporated

Inventor： ATTAR, Rashid Ahmed Akbar ,  JOU, Yu-Cheun ,  BLACK, Peter J. ,  MA, Jun

IPC: H04B1/707

CPC classification number: H04B1/7107 ,  H04B1/71075 ,  H04B2201/70701 ,  H04L25/0224 ,  H04W52/12

Abstract: Techniques for generalized pilot interference cancellation in a communications receiver. In an exemplary embodiment, a residual pilot is cancelled from a post-traffic cancellation signal following initial first-pass pilot cancellation. Residual pilot cancellation is achieved by adding the first-pass cancelled pilot as earlier stored in memory back to the post-traffic cancellation signal, and pilot filtering the resulting signal to generate an improved pilot interference estimate. In an alternative exemplary embodiment, an arbitrary number of iterations may be applied to generate the pilot interference estimate by successively storing each generated pilot interference estimate in memory.

公开(公告)号：EP2359657A1

公开(公告)日：2011-08-24

申请号：EP09749262.3

申请日：2009-10-28

Applicant: QUALCOMM Incorporated

Inventor： JOU, Yu-Cheun ,  ATTAR, Rashid Ahmed Akbar ,  MA, Jun

IPC: H04W72/12 ,  H04W36/18

CPC classification number: H04W52/54 ,  H04J13/0003 ,  H04J13/0048 ,  H04W36/08 ,  H04W36/18 ,  H04W52/40

Abstract: A method for processing forward link channel signals generated by a CDMA base station includes time sharing by several mobile stations of spreading codes, which are orthogonal codes such as Walsh Code, and code-combining soft/softer handoff across sectors in the mobile station active set to increase dimensions on the CDMA2000 and WCDMA downlink while minimizing intra-sector interference. Since different parts of a packet or frame are transmitted to the user by the different base stations in the active set, earlier decoding and therefore early packet termination is enabled.

公开(公告)号：EP1198900B1

公开(公告)日：2009-09-30

申请号：EP00950429.1

申请日：2000-07-18

Applicant: QUALCOMM INCORPORATED

Inventor： JOU, Yu-Cheun ,  SAIFUDDIN, Ahmed ,  TIEDEMANN, Edward, G., Jr. ,  BUTLER, Brian, K.

IPC: H04B7/005 ,  H04B1/707

CPC classification number: H04W52/54 ,  H04B2201/70703 ,  H04W52/44

Abstract: The present invention is a novel and improved method and system for communicating a frame of information according to a discontinuous transmit format. In particular, the present invention describes a method of transmitting eighth rate speech or data frames employing transmit gating and energy scaling which simultaneously reduces the battery usage of a variable rate wireless communication device (50), increases the capacity of the reverse link and provides reliable communication of the eighth rate frames. In the present invention, four methods are presented for transmitting an eighth rate data frame in which half of the frame is gated out and the remaining data is transmitted at nominal transmission energy to accomplish the aforementioned goals.

公开(公告)号：EP1240724B1

公开(公告)日：2009-03-18

申请号：EP00989412.2

申请日：2000-12-21

Applicant: QUALCOMM INCORPORATED

Inventor： JOU, Yu-Cheun

IPC: H04B1/707 ,  H04W88/02 ,  H04L5/02

CPC classification number: H04W48/16 ,  H04B1/70754 ,  H04B1/7077 ,  H04B1/70775 ,  H04B2201/70701 ,  H04B2201/70707 ,  H04L5/026

Abstract: A method and apparatus to search for a traffic channel in a multi-carrier spread spectrum communication network. In this first embodiment, all three pilot signals are transmitted with equal power from the base station. The remote station can noncoherently combine the received energy of all three pilots on a time hypothesis. This will reduce the value of M (the noncoherent accumulation time) by a factor of three. Thus the mean acquisition time is shortened by a factor of three with the same probability of detection and false alarm as a signal carrier (1X) system, if each pilot is equivalent to a 1X pilot in power. Note that the number of operations (i.e., complexity) is the same as that for a 1X system, but the time elapsed is shortened by a factor of 3.

公开(公告)号：EP1264420B1

公开(公告)日：2008-01-16

申请号：EP01914638.0

申请日：2001-03-02

Applicant: QUALCOMM INCORPORATED

Inventor： SARKAR, Sandip ,  JOU, Yu-Cheun ,  HOLTZMAN, Jack, M.

IPC: H04B7/005

CPC classification number: H04W52/286 ,  G01S11/10 ,  H04W52/146 ,  H04W52/282

Abstract: A method of modifying gain tables for the reverse-link communications in a cdma2000 wireless communication network includes the steps of estimating the velocity of a mobile station for a given frame error rate (FER) and data rate, and providing three gains to choose between based on the estimated velocity in order to specify a reverse-link transmit power level. The velocity estimation may be performed using a level crossing technique, a covariance approximation technique, or a Doppler spectrum estimation technique.

公开(公告)号：EP0956661B1

公开(公告)日：2007-05-30

申请号：EP98903591.0

申请日：1998-01-27

Applicant: QUALCOMM INCORPORATED

Inventor： WILLENEGGER, Serge ,  TIEDEMANN, Edward, G., Jr. ,  JOU, Yu-Cheun ,  ODENWALDER, Joseph, P.

IPC: H04B7/005 ,  H04Q7/20

CPC classification number: H04W52/146 ,  H04W52/16 ,  H04W52/20 ,  H04W52/325

Abstract: A novel and improved method for performing transmit power control is described. A signal is transmitted at a transmit power and includes a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitting at a pilot channel (70) transmit power. The receive energy of the pilot channel is measured, and a decrease power control command (121) is generated when the receive energy is greater than a receive energy threshold. If the receive energy is less than the receive energy threshold, an increase power control command (121) is generated. The power control command (121) is transmitted to the system generating the signal.

公开(公告)号：EP0806101B1

公开(公告)日：2007-02-28

申请号：EP95942506.7

申请日：1995-11-29

Applicant: QUALCOMM INCORPORATED

Inventor： TIEDEMANN, Edward, G., Jr. ,  JOU, Yu-Cheun ,  WEAVER, Lindsay, A., Jr. ,  BAYLEY, Gwain

IPC: H04L1/24 ,  H04L1/12

CPC classification number: H04L1/20 ,  H04L1/241 ,  H04L1/242 ,  H04L2027/0034

Abstract: The invention provides a system and method for testing signal transmission quality wihin a digital communication system and may be incorporated within a digital cellular communication system in which information is exchanged over spread spectrum communication channels. A test sequence of digital data transmitted over the communication channel is received at a receiving station, within which is also generated a replica of the test sequence of digital data. The accuracy of transmission over the communication channel is then determined by comparing the replica of the test sequence of digital data to the test sequence of data received over the communication channel. The invention allows the test sequence of digital data to be transmitted at one of a set of known data rates, with the received station being disposed to identify the data rate associated with each test sequence of digital data. In order to simulate the transmission of, for example, voice data, the system may be configured such that each test sequence of digital data is generated in accordance with a pseudorandom process.