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1.发明专利
公开(公告)号：JP2006319997A
公开(公告)日：2006-11-24
申请号：JP2006157032
申请日：2006-06-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHENG TERRY SI-FONT , HUANG CHING YAO , KOO YUEN-YIN , SHEN-DE-LIN , WEAVER CARL F
Abstract: PROBLEM TO BE SOLVED: To provide a procedure for a handdown or a handoff of a mobile station moving between adjacent cells of a wireless communication system, in particular, a procedure of a handdown and a handoff to be triggered based on a loss of a propagation path between a mobile station and a base station serving that mobile station at present. SOLUTION: The disclosed method comprises steps of: radiating a control signal at a known transmit power level from a base station over its cell; determining a receive power level threshold for the control signal to a mobile station, according to the transmit power level and a tolerable path loss for signal links between the base station and the mobile station; and triggering a handdown or a handoff after deriving the receive power level of the control signal at the mobile station, and determining that the receive power level is less than the receive power level threshold. COPYRIGHT: (C)2007,JPO&INPIT
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公开(公告)号：JP2000092549A
公开(公告)日：2000-03-31
申请号：JP23016399
申请日：1999-08-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHENG TERRY SI-FONT , HUANG CHING YAO , KOO YUEN-YIN , SHEN-DE-LIN , WEAVER CARL F
Abstract: PROBLEM TO BE SOLVED: To realize hand-down and hand-off procedures to be triggered based on the loss in a propagation route between a mobile station and a base station providing service at present. SOLUTION: This method triggers hand-down or hand-off of a mobile station serviced representatively by a base station in a cellular radio communication system. The method consists of a step for radiating a control signal from a base station on a cell by a known transmission power level, a step for determining a receiving power level threshold for the control signal to the mobile station in accordance with the transmission power level and a route loss allowable to a signal link between the base station and the mobile station and a step for calculating the receiving power level of the control signal in the mobile station, determining that the receiving power level is lower than the receiving power level threshold and triggering the hand-down or hand-off of the mobile station.
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公开(公告)号：DE69934554T2
公开(公告)日：2007-10-04
申请号：DE69934554
申请日：1999-08-10
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHENG TERRY SI-FONT , HUANG CHING YAO , KOO YUEN-YIN , SHEN-DE-LIN MORRIS , WEAVER CARL F
Abstract: A procedure for triggering a handdown or a handoff a mobile station served by a base station of a cellular wireless communication system. A tolerable path loss for signal links between the base station and a mobile station located within the base station's cell, is initially determined. A control signal is radiated at a known transmit power level from the base station over its cell. A receive power level threshold is determined for the control signal for reception by the mobile station, according to the transmit power level and the tolerable path loss. A handoff of the mobile station is triggered after deriving the received power level of the control signal at the mobile station, and determining that the received power level is less than the receive power level threshold. In one embodiment, a mobile station reports to a serving base station only after the former determines that the received power level of a control signal from the base station is less than a threshold level initially provided to the mobile station by the base station. The procedure is applicable, e.g., to base station cells of a first CDMA cellular system which cells border on cells of an analog (AMPS) or a second CDMA cellular system.
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公开(公告)号：AU4449499A
公开(公告)日：2000-03-09
申请号：AU4449499
申请日：1999-08-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHENG TERRY SI-FONG , WEAVER CARL F , LIN SHEN-DE , KOO YUEN-YIN , HUANG CHING YAO
Abstract: A procedure for triggering a handdown or a handoff a mobile station served by a base station of a cellular wireless communication system. A tolerable path loss for signal links between the base station and a mobile station located within the base station's cell, is initially determined. A control signal is radiated at a known transmit power level from the base station over its cell. A receive power level threshold is determined for the control signal for reception by the mobile station, according to the transmit power level and the tolerable path loss. A handoff of the mobile station is triggered after deriving the received power level of the control signal at the mobile station, and determining that the received power level is less than the receive power level threshold. In one embodiment, a mobile station reports to a serving base station only after the former determines that the received power level of a control signal from the base station is less than a threshold level initially provided to the mobile station by the base station. The procedure is applicable, e.g., to base station cells of a first CDMA cellular system which cells border on cells of an analog (AMPS) or a second CDMA cellular system.
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公开(公告)号：DE602004011141D1
公开(公告)日：2008-02-21
申请号：DE602004011141
申请日：2004-05-05
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MEYERS MARTIN H , SALVARANI ALEXANDRO , WEAVER CARL F
IPC: H04B7/005 , H04B7/26 , H04L1/18 , H04L1/20 , H04L12/56 , H04W52/12 , H04W52/20 , H04W52/26 , H04W52/48
Abstract: A method of detecting DTX frames in frames received over a communication channel and power control method are described, where radio link protocol (RLP) information received over the channel may is received, and one or more frames associated with the RLP information may be determined as an erasure or a DTX frame, based on said RLP information. Such determination may be incorporated into outer loop power control algorithms for adjusting a threshold related to a specified quality of service.
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Patent Agency Ranking
公开(公告)号：ID24114A
公开(公告)日：2000-07-06
申请号：ID990718
申请日：1999-07-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHENG TERRY SI-FONG , HUANG CHING YAO , KOO YUEN YIN , LIN SHEN-DE , WEAVER CARL F
Abstract: A procedure for triggering a handdown or a handoff a mobile station served by a base station of a cellular wireless communication system. A tolerable path loss for signal links between the base station and a mobile station located within the base station's cell, is initially determined. A control signal is radiated at a known transmit power level from the base station over its cell. A receive power level threshold is determined for the control signal for reception by the mobile station, according to the transmit power level and the tolerable path loss. A handoff of the mobile station is triggered after deriving the received power level of the control signal at the mobile station, and determining that the received power level is less than the receive power level threshold. In one embodiment, a mobile station reports to a serving base station only after the former determines that the received power level of a control signal from the base station is less than a threshold level initially provided to the mobile station by the base station. The procedure is applicable, e.g., to base station cells of a first CDMA cellular system which cells border on cells of an analog (AMPS) or a second CDMA cellular system.
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公开(公告)号：DE602004011141T2
公开(公告)日：2009-01-02
申请号：DE602004011141
申请日：2004-05-05
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MEYERS MARTIN H , SALVARANI ALEXANDRO , WEAVER CARL F
IPC: H04B7/005 , H04B7/26 , H04L1/18 , H04L1/20 , H04L12/56 , H04W52/12 , H04W52/20 , H04W52/26 , H04W52/48
Abstract: A method of detecting DTX frames in frames received over a communication channel and power control method are described, where radio link protocol (RLP) information received over the channel may is received, and one or more frames associated with the RLP information may be determined as an erasure or a DTX frame, based on said RLP information. Such determination may be incorporated into outer loop power control algorithms for adjusting a threshold related to a specified quality of service.
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公开(公告)号：ES2277412T3
公开(公告)日：2007-07-01
申请号：ES99306307
申请日：1999-08-10
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHENG TERRY SI-FONT , HUANG CHING YAO , KOO YUEN-YIN , SHEN-DE-LIN , WEAVER CARL F
Abstract: Un método de recepción de las mediciones desde la estación móvil (16) hasta una estación de base (10) de un sistema de comunicación inalámbrica celular (12) que irradia una señal de control desde la estación de base y recibe una medición de la fuerza de la señal de control Ec/Io de dicha señal de control realizada en dicha estación móvil (16), dicha medición de la fuerza de la señal de control Ec/Io es una proporción de la potencia de la señal de control dividida entre la potencia total de la señal recibida, dicho método caracterizado por: recibir desde dicha estación móvil (16) una medición separada de la potencia total de la señal recibida que es realizada en dicha estación móvil (16) y separada de dicha medición de la fuerza de la señal de control.
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公开(公告)号：DE69934554D1
公开(公告)日：2007-02-08
申请号：DE69934554
申请日：1999-08-10
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHENG TERRY SI-FONT , HUANG CHING YAO , KOO YUEN-YIN , SHEN-DE-LIN MORRIS PLAINS , WEAVER CARL F
Abstract: A procedure for triggering a handdown or a handoff a mobile station served by a base station of a cellular wireless communication system. A tolerable path loss for signal links between the base station and a mobile station located within the base station's cell, is initially determined. A control signal is radiated at a known transmit power level from the base station over its cell. A receive power level threshold is determined for the control signal for reception by the mobile station, according to the transmit power level and the tolerable path loss. A handoff of the mobile station is triggered after deriving the received power level of the control signal at the mobile station, and determining that the received power level is less than the receive power level threshold. In one embodiment, a mobile station reports to a serving base station only after the former determines that the received power level of a control signal from the base station is less than a threshold level initially provided to the mobile station by the base station. The procedure is applicable, e.g., to base station cells of a first CDMA cellular system which cells border on cells of an analog (AMPS) or a second CDMA cellular system.
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公开(公告)号：AT349867T
公开(公告)日：2007-01-15
申请号：AT99306307
申请日：1999-08-10
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHENG TERRY SI-FONT , HUANG CHING YAO , KOO YUEN-YIN , SHEN-DE-LIN , WEAVER CARL F
Abstract: A procedure for triggering a handdown or a handoff a mobile station served by a base station of a cellular wireless communication system. A tolerable path loss for signal links between the base station and a mobile station located within the base station's cell, is initially determined. A control signal is radiated at a known transmit power level from the base station over its cell. A receive power level threshold is determined for the control signal for reception by the mobile station, according to the transmit power level and the tolerable path loss. A handoff of the mobile station is triggered after deriving the received power level of the control signal at the mobile station, and determining that the received power level is less than the receive power level threshold. In one embodiment, a mobile station reports to a serving base station only after the former determines that the received power level of a control signal from the base station is less than a threshold level initially provided to the mobile station by the base station. The procedure is applicable, e.g., to base station cells of a first CDMA cellular system which cells border on cells of an analog (AMPS) or a second CDMA cellular system.
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