公开(公告)号：BR0103159A

公开(公告)日：2002-04-02

申请号：BR0103159

申请日：2001-07-31

Applicant: LUCENT TECHNOLOGIES INC

Inventor： WEAVER CARL FRANCIS ,  WU XIAO CHENG

IPC: H01Q1/24 ,  H01Q3/26 ,  H01Q21/20 ,  H01Q25/00 ,  H04B7/26 ,  H01Q21/00

Abstract: A system and method have been developed wherein a cylindrical antenna array is configured and reconfigured in a wireless communication network. Position and signal information are continuously received from wireless mobile units and are used to determine reconfigurations of antenna components of the cylindrical antenna array to enhance performance of the system. As such, base station antennas are dynamically configured to minimize such things as interference and dropped calls, and to maximize their voice quality both within a cell, and among neighboring cells.

公开(公告)号：BR0003642A

公开(公告)日：2001-04-03

申请号：BR0003642

申请日：2000-08-17

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KAMEL RAAFAT EDWARD ,  WEAVER CARL FRANCIS ,  MEYERS MARTIN HOWARD ,  WU XIAO CHENG ,  KUO WEN-YI

IPC: H04B7/26 ,  H04L1/00 ,  H04Q7/34

Abstract: A base station assembles a frame including information bits at a vocoding rate for downlink transmission over a traffic channel as channel bits at a channel rate. The base station places at least one rate-indicating bit at a beginning of the frame for indicating the vocoding rate. The mobile station evaluates the downlink transmission with consideration of the vocoding rate indicated by the at least one rate-indicating bit. The mobile station can determine the vocoding rate by decoding the beginning of the frame to permit power control in less than one frame duration from initial receipt of the frame at the mobile station.

公开(公告)号：AU5355200A

公开(公告)日：2001-03-01

申请号：AU5355200

申请日：2000-08-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KAMEL RAAFAT EDWARD ,  KUO WEN-YI ,  MEYERS MARTIN HOWARD ,  WEAVER CARL FRANCIS ,  WU XIAO CHENG

IPC: H04B7/26 ,  H04L1/00 ,  H04Q7/32 ,  H04L7/10

Abstract: A base station assembles a frame including information bits at a vocoding rate for downlink transmission over a traffic channel as channel bits at a channel rate. The base station places at least one rate-indicating bit at a beginning of the frame for indicating the vocoding rate. The mobile station evaluates the downlink transmission with consideration of the vocoding rate indicated by the at least one rate-indicating bit. The mobile station can determine the vocoding rate by decoding the beginning of the frame to permit power control in less than one frame duration from initial receipt of the frame at the mobile station.

公开(公告)号：AU4266300A

公开(公告)日：2001-01-11

申请号：AU4266300

申请日：2000-06-26

Applicant: LUCENT TECHNOLOGIES INC

Inventor： KAMEL RAAFAT EDWARD ,  KUO WEN-YI ,  MEYERS MARTIN HOWARD ,  WEAVER CARL FRANCIS ,  WU XIAO CHENG

IPC: H04L1/16 ,  H04B7/005 ,  H04B7/26 ,  H04L1/20 ,  H04B7/216 ,  H04Q7/38

Abstract: A power control method of the invention may be applied to downlink power control, uplink power control, or both to support different quality of service levels for multiple channels per a mobile station. The power control method transmits control data between a base station and a multi-channel mobile station on a single communications channel or sub-channel to minimize or reduce overhead traffic from the control data.

公开(公告)号：CA2282979A1

公开(公告)日：2000-05-12

申请号：CA2282979

申请日：1999-09-22

Applicant: LUCENT TECHNOLOGIES INC

Inventor： WU XIAO CHENG ,  WANG JIAN-REN ,  RAMESH NALLEPILLI S ,  MEYERS MARTIN HOWARD

IPC: H04Q7/38

Abstract: Disclosed is a method for significantly reducing the amount of collisions of access messages on reverse link Random Access Channels (RACH) by multiple mobilestations attempting to gain system access concurrently, thereby greatly improving access performance in wireless communications system using existing multiple access schemes. The improvement is achieved by transmitting a probe message instead of an access message over the RACH, wherein the probe message is shorter in length than the access message. Transmission of the probe messages utilizes less of the RACH than the longer access messages, thereby reducing the chance of collisions with other probe messages. The access message is subsequently sent on a traffic channel or a control channel designated by a base station receiving the probe message. Alternately, a data burst is transmitted over the designated traffic channel or control channel.

公开(公告)号：CA2264433A1

公开(公告)日：1999-09-26

申请号：CA2264433

申请日：1999-03-03

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BERNSTEIN NEIL E ,  WU XIAO CHENG ,  KUO WEN-YI ,  WEAVER CARL FRANCIS ,  WANG XIAO ,  MEYERS MARTIN HOWARD

IPC: H04W36/14 ,  H04Q7/38

Abstract: Inter-frequency handoffs in a CDMA or other wireless communication system are controlled using a noise-limited coverage trigger metric which is able to distinguish between same-frequency cell boundaries and other-frequency cell boundaries in the system. The trigger metric may be generated as a function of an average signal-to-noise measure for pilot signals received at a mobile station of the system and a linear sum of the signal-to-noise measures. The signal-to-noise measures may be generated in the mobile station and included in messages transmitted from the mobile station to one or more base stations of the system. The trigger metric is used to control a handoff from a current frequency to a new frequency in an ongoing call. The trigger metric may alternatively be based on a measure of mobile receive power alone. Other aspects of the invention reduce unnecessary searching for a new frequency and decrease the likelihood of "pingponging" from a current frequency to a new frequency by providing additional checks in the handoff process. For example, receive power and pilot signal-to-noise measures may be generated at a mobile station for both current and new frequencies. The mobile station then continues to operate at the current frequency as long as certain predetermined threshold conditions based on the measures are satisfied.