公开(公告)号：AU2265400A

公开(公告)日：2000-10-12

申请号：AU2265400

申请日：2000-03-29

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHEN TSAO-TSEN ,  KUO WEN-YI ,  MEYERS MARTIN HOWARD

IPC: H04W72/08 ,  H04W36/18 ,  H04W74/02 ,  H04Q7/22 ,  H04B7/216

Abstract: The invention provides a novel methodology for increasing the performance of CDMA systems with packet data services by accommodating a variety of users with different rates. The invention operates to increase the spectrum efficiency of a wireless system by using an optimal transmission set of base transceiver stations and assigning proper data rates to efficiently utilize the radio resources. In particular, the invention operates to decrease interference so that the quality of data transmission in CDMA systems is advantageously maintained. Moreover, the invention operates to increase the allocation of bandwidth, particularly for high-speed data services. The invention provides a methodology to evaluate the data rates of different combinations of BTSs that may be in connection with a particular mobile station (MS), allocate an appropriate data rate for the MS and make allocation of system resources more efficient in a multi-user environment.

公开(公告)号：CA2303700A1

公开(公告)日：2000-10-08

申请号：CA2303700

申请日：2000-04-04

Applicant: LUCENT TECHNOLOGIES INC

Inventor： PATEL TEJASKUMAR R ,  CLOUTIER JOSEPH E ,  KUO WEN-YI

IPC: H04L12/28 ,  H04L12/56 ,  H04L29/08 ,  H04W28/04 ,  H04W28/14 ,  H04W28/22 ,  H04W72/04 ,  H04W76/02 ,  H04Q7/36 ,  H04Q7/38

Abstract: A method to dynamically assign data rates, for digital data transmission in wireless communication systems, which are just sufficient to meet the needs of the use is presented. The method monitors the data traffic and anticipates when the assigned data rate is inadequate to support the data traffic resulting in a loss of data or when the assigned data rate is more than necessary to support the data traffic and results in inefficient usage of system resources.

公开(公告)号：CA2302923A1

公开(公告)日：2000-10-08

申请号：CA2302923

申请日：2000-03-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHEN TSAO-TSEN ,  KUO WEN-YI ,  MEYERS MARTIN HOWARD

IPC: H04W72/08 ,  H04W36/18 ,  H04W74/02 ,  H04Q7/36

Abstract: The invention provides a novel methodology for increasing the performance of CDMA systems with packet data services by accommodating a variety of users with different rates. The invention operates to increase the spectrum efficiency of a wireless system by using an optimal transmission set of base transceiver stations and assigning proper data rates to efficiently utilize the radio resources. In particular, the invention operates to decrease interference so that the quality of data transmission in CDMA systems is advantageously maintained. Moreover, the invention operates to increase the allocation of bandwidth, particularly for high-speed data services. The invention provides a methodology to evaluate the data rates of different combinations of BTSs that may be in connection with a particular mobile station (MS), allocate an appropriate data rate for the MS and make allocation of system resources more efficient in a multi-user environment.

公开(公告)号：BR9903881A

公开(公告)日：2000-08-29

申请号：BR9903881

申请日：1999-08-23

Applicant: LUCENT TECHNOLOGIES INC

Inventor： JIANG FRANCES ,  KUO WEN-YI

IPC: H04B7/155 ,  H04B7/26 ,  H04J3/06 ,  H04W16/26 ,  H04W88/08 ,  H04Q7/30

Abstract: The present invention is a extended range concentric cell base station and a method for extending a cell size or access range without incurring ASIC correlator re-design. This is accomplished with a concentric cell base station design that incorporates multiple timing protocols. The concentric base station has associated a micro cell and a macro cell, wherein the micro and macro cells use a different timing protocol that will cause signals transmitted by mobiles within their respective cells to be received within the confines of search windows associated with the timing protocols.

公开(公告)号：CA2295265A1

公开(公告)日：2000-07-11

申请号：CA2295265

申请日：2000-01-10

Applicant: LUCENT TECHNOLOGIES INC

Inventor： CHEN TAI-ANN ,  KUO WEN-YI

IPC: H03M5/00 ,  H04J11/00 ,  H04J13/00 ,  H04J13/18 ,  H04W72/02 ,  H04W72/04 ,  H04Q7/38

Abstract: In a wireless communication system, unique methods are presented to dynamically assign channel codes of different lengths in a manner to maintain orthogonality among assigned channels. In one embodiment of the method of the invention, channel codes that require relatively long-lengths are assigned from a first end of a list of unassigned channel codes and channel codes of a shorter length are assigned from an opposing end of a list of unassigned channel codes. Assignment of a shorter length code sequence is made if the longer-length channel codes that depend from the proposed shorter-length code sequence are available. In another embodiment of the invention, the availability of short length channel codes is derived directly from the availability of the longest length channel codes. In this embodiment of the invention, a group of longest-length channel codes that contain a common shorter-length code of the desired length are checked for availability. If all the codes of the group are available then the common shorter-length code may be assigned to the transmission. Further, in accordance with the methods of the invention by assigning transmissions that require longer-length sequences from a first end of a list of channel codes and shorter length sequences from an opposing end of a list of channel codes, the number of channels available for shorter length sequences is maximized.

公开(公告)号：CA2289361A1

公开(公告)日：2000-06-18

申请号：CA2289361

申请日：1999-11-10

Applicant: LUCENT TECHNOLOGIES INC

Inventor： MEYERS MARTIN HOWARD ,  WU XIAO CHENG ,  KUO WEN-YI

IPC: H04B7/216 ,  H04B7/26 ,  H04L29/06 ,  H04Q7/38 ,  H04B1/66 ,  H04L29/02 ,  H04B1/76

Abstract: The present invention is a method for efficiently utilizing spectrum resources belonging to a wireless communications system in the presence of data channels through a discontinuous data transmission technique: The discontinuous data transmission technique involves the transmission of a flag over a control channel (or some other communication channel) in frame f, wherein the flag would indicate to an intended recipient that a transmitter has a data frame to transmit to the recipient in some future frame f+q. In an embodiment, the transmitter would subsequently transmit the data frame over a data channel (or some other communication channel) in frame, f+q if the flag indicated that the data frame was ready to be transmitted. In another embodiment, the transmitter would not transmit the data frame unless the recipient has indicated (via another flag) that the recipient is ready to receive the frame of data from the transmitter.

公开(公告)号：AU4475999A

公开(公告)日：2000-03-16

申请号：AU4475999

申请日：1999-08-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： JIANG FRANCES ,  KUO WEN-YI ,  KAMEL RAAFAT EDWARD

IPC: H04B7/04 ,  H04B7/26 ,  H04W16/26 ,  H04W16/30 ,  H04W16/32 ,  H04W36/08 ,  H04W36/38 ,  H04Q7/30 ,  H04Q7/20

Abstract: The present invention is a method for performing handoffs in wireless communications systems having extended range concentric cell base station, wherein the concentric cell base station has a micro cell and a macro cell that incorporates multiple timing protocols to extend the base station's access range. In one embodiment, the base station determines whether a handoff is to be performed using absolute path delay information, which will indicate the current and previous positions of a mobile-telephone. If the absolute path delay information indicates that the mobile-telephone is moving between the macro cell and the micro cell, or to a cell associated with another base station, the current base station will instruct the mobile-telephone to perform a handoff to the frequency band associated with the micro cell, macro cell or base station to which the mobile-telephone is traveling towards.

公开(公告)号：CA2264471A1

公开(公告)日：1999-09-30

申请号：CA2264471

申请日：1999-03-05

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KUO WEN-YI ,  WEAVER CARL FRANCIS ,  MEYERS MARTIN HOWARD

IPC: H04B7/12 ,  H04W36/30 ,  H04Q7/38

Abstract: An apparatus and method which, in a wireless communication system, improve the quality of inter-frequency hand-offs from an existing call connection frequency to a new frequency by minimizing oscillating inter-frequency hand-offs between the existing call connection frequency and the new frequency, and by minimizing redundant and unnecessary tuning and searching at the new frequency. The present invention accomplishes this improvement by adding specific threshold comparison values (or triggers) within existing messages and through more robust data reporting, from the mobile unit to the base station, when tuning and searching is performed. Particularly, two comparative triggers provided by the present invention avoid unnecessary tuning and searching in the new frequency, thus reducing voice degradation and the risk of dropped calls while pilot searching in the current frequency. Additionally, an alternative embodiment of the present invention compares received power in the new frequency to the received power in the original frequency. If the received power in the new frequency does not exceed the received power in the original frequency by a specified hysteresis threshold value, then a search of the new frequency is unnecessary and the mobile unit "retunes" to the original frequency.

公开(公告)号：CA2254483A1

公开(公告)日：1999-06-15

申请号：CA2254483

申请日：1998-11-24

Applicant: LUCENT TECHNOLOGIES INC

Inventor： NANDA SANJIV ,  KUO WEN-YI ,  MEYERS MARTIN HOWARD ,  KNISELY DOUGLAS N

IPC: H04B1/04 ,  H04J11/00 ,  H04Q7/36 ,  H04B7/005 ,  H04Q7/22

Abstract: An apparatus for reducing power amplifier headroom in a wireless transmission system comprises an orthogonal modulation circuit and a phase rotation circuit c oupled to the orthogonal modulation circuit. The orthogonal modulation circuit utilizes a Walsh code for modulating an in-phase signal and a quadrature signal. The orthogonal modulation circuit has an in-phase output and a quadrature output. The phase rot ation circuit rotates phase of the in-phase signal the quadrature signal, producing a phase rotated in-phase signal abd a phase rotated quadrature signal. Multiple Walsh co de defined channels are associated with a particular wireless user.

公开(公告)号：DE69836887T2

公开(公告)日：2007-07-05

申请号：DE69836887

申请日：1998-10-13

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KUO WEN-YI

IPC: H04B1/69 ,  H04B7/26 ,  H04L1/00 ,  H04L5/02 ,  H04Q7/36 ,  H04Q7/38

Abstract: A method for allocating utilization of multiple carriers in a wideband CDMA transmission system first determines the carrier utilization/interference levels for each of the multiple carriers. Based on the carrier utilization/interference level, carrier assignments are allocated on an unequal basis. The allocation of the carrier assignment biases the selection of the carriers away from higher utilized/interfered carriers. An apparatus for implementing the method is also described.