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1.发明专利
公开(公告)号：JP2002152849A
公开(公告)日：2002-05-24
申请号：JP2001274702
申请日：2001-09-11
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 , H04Q7/38 , H04J13/00
Abstract: PROBLEM TO BE SOLVED: To disclose a method that uses transmission power information so as to decide a data rate thereby integrating a voice service and a data service on a same frequency channel in which the available transmission power information indicates an amount of transmission power available for future data transmission on one data channel or more. SOLUTION: A transmitter or a base station transmits an available power message denoting a quantity of available transmission power to a mobile phone for a prescribed future time via a forward link. The mobile phone performs signal-to-interference measurement corresponding to the received forward link and the received interference and decides a data rate supported by the mobile phone by using the signal to interference wave and the available power message. The decided data rate corresponds to a maximum data rate at which a minimum level of quality of service can be achieved at the mobile phone.
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公开(公告)号：JP2002027562A
公开(公告)日：2002-01-25
申请号：JP2001141476
申请日：2001-05-11
Applicant: LUCENT TECHNOLOGIES INC
Abstract: PROBLEM TO BE SOLVED: To provide improved scheduling of radio data communication. SOLUTION: On the basis of a channel condition or a data rate which are related to each mobile station, scheduling precedence is established for transmission of data to the mobile station in a cellular communication system. Each of the mobile stations can have different channel condition or data rate. The channel condition and the data rate which are related to each of the mobile stations may be set when the mobile station is firstly added to a mobile station list, or may be recalculated during a transmission period.
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公开(公告)号：JPH11313040A
公开(公告)日：1999-11-09
申请号：JP7467299
申请日：1999-03-19
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BALACHANDRAN KRISHNA , EJZAK RICHARD PAUL , KADABA SRINIVAS R , NANDA SANJIV
IPC: H04B17/00 , H03M13/23 , H04B1/10 , H04B7/26 , H04L1/00 , H04L1/12 , H04L1/20 , H04L27/00 , H04L27/18 , H04L27/34 , H04W36/30 , H04W72/08
Abstract: PROBLEM TO BE SOLVED: To measure a channel quality by a signal-to-interference and noise ratio (SIR) by receiving a digital signal, deciding a path measurement reference to the digital signal and performing path measurement reference mapping of the SIR corresponding to a set of prescribed SIRs. SOLUTION: In a differential phase shift keying system of M-th degree, a maximum likelihood decoder 112 selects a path having a minimum cumulative Euclid's distance measurement reference, decodes a corresponding data sequence 132 and outputs it. A dividing device of M-th degree or a mapping circuit 136 maps the sequence 132 to an M-th degree sequence 138 in order to decide SIR measurement reference. After that, a processor 140 calculates weighted Euclid's distance measurement reference mi 142 which is used as a SIR to the i-th frame by using the sequence 132 and a demodulated sequence 110.
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公开(公告)号：JPH11150571A
公开(公告)日：1999-06-02
申请号：JP23788398
申请日：1998-08-25
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BALACHANDRAN KRISHNA , EJZAK RICHARD PAUL , KADABA SRINIVAS R , 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 , H03M13/12
Abstract: PROBLEM TO BE SOLVED: To provide the system and method that measures quality of a channel based on S/N for the purpose of sending a coded signal through a fading channel. SOLUTION: A Viterbi decoder 56 with respect to a maximum likelihood is used for a measure of channel quality. The measure of the Euclid distance is filtered to smooth a short-term fluctuation. The smoothed or filtered measure is a channel quality measure that is consistent with and reliable for different code modulation systems and different mobile speeds. The filtered measure is mapped for the S/N per symbol by using a threshold level method. This tacit S/N estimate is used adaptively for a hand-off and a data rate of mobile aid model in a transmitter.
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公开(公告)号：DE602005000021D1
公开(公告)日：2006-08-03
申请号：DE602005000021
申请日：2005-01-20
Applicant: LUCENT TECHNOLOGIES INC
Inventor： DOMINIQUE FRANCIS , KADABA SRINIVAS R , KONG HONGWEI
Abstract: A decision as to whether a mobile terminal (202) has transmitted an ACK, a NACK or a NULL from a received signal at a base station (201) is made by successively eliminating (303, 304, 307) one of the three possible transmitted symbols by sequentially applying decision rules that maximize network throughput by minimizing the sum of the weighted costs of making a decision based on the magnitude of the received signal.
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Patent Agency Ranking
公开(公告)号：DE60014855D1
公开(公告)日：2004-11-18
申请号：DE60014855
申请日：2000-11-20
Applicant: LUCENT TECHNOLOGIES INC
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公开(公告)号：DE60111189T2
公开(公告)日：2006-03-23
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
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.
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公开(公告)号：CA2357092C
公开(公告)日：2005-03-22
申请号：CA2357092
申请日：2001-08-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SUNAY MEHMET OGUZ , RUDRAPATNA ASHOK N , GOPALAKRISHNAN NANDU , KOGIANTIS ACHILLES GEORGE , VITEBSKY STANLEY , JOSHI NIRANJAN SUDHIR , SUNDARAM GANAPATHY SUBRAMANIAN , 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.
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公开(公告)号：AU2121799A
公开(公告)日：1999-09-30
申请号：AU2121799
申请日：1999-03-16
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BALACHANDRAN KRISHNA , NANDA SANJIV , KADABA SRINIVAS R , EJZAK RICHARD PAUL
IPC: H04B17/00 , H03M13/23 , H04B1/10 , H04B7/26 , H04L1/00 , H04L1/12 , H04L1/20 , H04L27/00 , H04L27/18 , H04L27/34 , H04W36/30 , H04W72/08 , H04Q7/34
Abstract: A system and method to measure channel quality in terms of signal to interference plus noise ratio for the transmission of coded signals over fading channels in a communication system. A Viterbi decoder metric for the Maximum Likelihood path is used as a channel quality measure for coherent and non-coherent transmission schemes. This Euclidean distance metric is filtered in order to smooth out short term variations. The filtered or averaged metric is a reliable channel quality measure which remains consistent across different coded modulation schemes speeds. The filtered metric is mapped to the signal to interference plus noise ratio per symbol using a threshold based scheme. Use of this implicit signal to interference plus noise ratio estimate is used for the mobile assisted hand off in a cellular system, power control and data rate adaptation in the transmitter.
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公开(公告)号：DE60014855T2
公开(公告)日：2006-02-02
申请号：DE60014855
申请日：2000-11-20
Applicant: LUCENT TECHNOLOGIES INC
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