公开(公告)号：DE60111189D1

公开(公告)日：2005-07-07

申请号：DE60111189

申请日：2001-11-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GOPALAKRISHNAN NANDU ,  KADABA SRINIVAS R ,  RUDRAPATNA ASHOK N ,  SUNDARAM GANAPATHY SUBRAMANIAN

IPC: H04J13/04 ,  H04B7/005 ,  H04W52/26 ,  H04W52/50 ,  H04W72/04 ,  H04W72/12 ,  H04Q7/38

Abstract: Efficient data communication in wireless communication system is provided by using centralized control of data communications, such as packet switched services, over the uplink channel (mobile station (MS) to base station (BS)). A multiple access protocol is used where packet data mobile stations make requests for uplink channel resources. The request messages transmitted by the MSs inform the BS of service parameters. Examples of such service parameters are available transmit power at the MS, the amount of data to transmit and Quality of Service (QoS). The BS then processes the received request messages and performs interference management calculations to determine the portion of the BS's receive power budget that can be allocated to the data user requesting service. These calculations are used to control the amount of interference seen at the base station, to assign a data rate to the user and to aid scheduling algorithms in computing service order priorities. Any scheduling algorithm may be used; for example, scheduling may be based on the amount of data to be transmitted, the age of the data or the service priority associated with the mobile station. The interference control is used to prevent the occurrence of catastrophic levels of interference while maximizing the utilization of resources on the uplink.

公开(公告)号：AT271286T

公开(公告)日：2004-07-15

申请号：AT03005755

申请日：2001-03-19

Applicant: LUCENT TECHNOLOGIES INC

Inventor： GOPALAKRISHNAN NANDU ,  JOSHI NIRANJAN SUDHIR ,  KADABA SRINIVAS R ,  KOGIANTIS ACHILLES GEORGE ,  RUDRAPATNA ASHOK N ,  SUNAY MEHMET OGUZ ,  SUNDARAM GANAPATHY SUBRAMANIAN ,  VITEBSKY STANLEY

IPC: H04B7/005 ,  H04B7/26 ,  H04W52/22 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34 ,  H04W52/54

Abstract: Disclosed is a method of integrating voice and data services onto a same frequency channel using available transmit power information to determine data rates, wherein the available transmit power information indicates an amount of transmit power available for future data transmissions over one or more data channels. In a "distributed" embodiment, a transmitter or base station transmits, via a forward link, an available power message to a receiver or mobile-telephone indicating an amount of available transmit power at some future time t+z. The mobile-telephone performs signal-to-interference measurements corresponding to the received forward link and received interference, and uses such signal-to-interference measurements and the available power message to determine a data rate that can be supported by the mobile-telephone. Preferably, the determined data rate corresponds to a maximum data rate at which a minimum level of quality of service can be achieved at the mobile-telephone. In a "centralized" embodiment, the mobile-telephone transmits the signal-to-interference measurements to the base station, and the base station determines the data rate based on the available transmit power at future time t+z.

公开(公告)号：CA2357092A1

公开(公告)日：2002-03-11

申请号：CA2357092

申请日：2001-08-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： SUNAY MEHMET OGUZ ,  JOSHI NIRANJAN SUDHIR ,  SUNDARAM GANAPATHY SUBRAMANIAN ,  RUDRAPATNA ASHOK N ,  VITEBSKY STANLEY ,  KOGIANTIS ACHILLES GEORGE ,  GOPALAKRISHNAN NANDU ,  KADABA SRINIVAS R

IPC: H04B7/005 ,  H04B7/26 ,  H04W52/22 ,  H04W52/24 ,  H04W52/26 ,  H04W52/34 ,  H04W52/54 ,  H04L12/26 ,  H04B17/00 ,  H04L1/20 ,  H04Q7/36

Abstract: Disclosed is a method of integrating voice and data services onto a sam e frequency channel using available transmit power information to determine da ta rates, wherein the available transmit power information indicates an amount of transmit pow er available for future data transmissions over one or more data channels. In a "distributed" embodiment, a transmitter or base station transmits. via a forward link, an available powe r message to a receiver or mobile-telephone indicating an amount of available transmit power at some future time t+z. The mobile-telephone performs signal-to-interference measurements corresponding to the received forward link and received interference, and uses such signal-to- interference measurements and the available power message to determine a data rate that c an be supported by the mobile-telephone. Preferably, the determined data rate corresponds to a maximum data rate at which a minimum level of quality of service can be achieved at the mobile- telephone. In a "centralized" embodiment, the mobile-telephone transmits the signal-to- interference measurements to the base station, and the base station determines the data rate based on the available transmit power at future time t+z.

公开(公告)号：CA2244428A1

公开(公告)日：1999-02-24

申请号：CA2244428

申请日：1998-07-30

Applicant: LUCENT TECHNOLOGIES INC

Inventor： BALACHANDRAN KRISHNA ,  KADABA SRINIVAS R ,  EJZAK RICHARD PAUL ,  NANDA SANJIV

IPC: H04L27/00 ,  H03M13/23 ,  H04B7/26 ,  H04B17/00 ,  H04L1/00 ,  H04L1/12 ,  H04L1/20 ,  H04L27/18 ,  H04L27/34 ,  H04W36/30 ,  H04W72/08 ,  H04Q7/34

Abstract: A system and method to measure channel quality in terms of signal to noise ratio for the transmission of coded signals over fading channels. A Viterbi deco der metric for the Maximum Likelihood path is used as a channel quality measure. Thi s Euclidean distance metric is filtered in order to smooth out short term variatio ns. The filtered or averaged metric is a reliable channel quality measure which rema ins consistent across different coded modulation schemes and at different mobile speeds. The filtered metric is mapped to the signal to noise ratio per symbol us ing a threshold based scheme. Use of this implicit signal to noise ratio estimate is u sed for the mobile assisted handoff and data rate adaptation in the transmitter.