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公开(公告)号：JP2001069559A
公开(公告)日：2001-03-16
申请号：JP2000214302
申请日：2000-07-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MCKAY BERNARD , TSAI SHENG-JEN , FALCO STEVEN A , MATUSEVICH ALEX , MURPHY MYLES PATRICK
Abstract: PROBLEM TO BE SOLVED: To allow base stations to attain synchronization between base stations, without mounting an expensive external device in TDMA and AMPS systems. SOLUTION: An object base station records the time stamp of a signal arrived from a service base station. Each object base station records the time stamp with respect to a clock signal of each of them. Each object base station is operated synchronously with the service base station, on the basis of a downlink offset calculated by each object base station. The downlink offset indicates a fractional symbol time from the time, the service base station sends the signal to a prescribed periodic time succeeding a symbol clock of the concerned object base station with respect to the internal symbol clock of each object base station. Each object base station decides the time, when the signal is transmitted on the basis of both the time, when the concerned object base station receives the signal and a known time required for propagation of the signal from the service base station to the object base station.
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公开(公告)号：DE69937932D1
公开(公告)日：2008-02-21
申请号：DE69937932
申请日：1999-08-23
Applicant: LUCENT TECHNOLOGIES INC
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公开(公告)号：CA2314266A1
公开(公告)日：2001-01-28
申请号：CA2314266
申请日：2000-07-18
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FALCO STEVEN A , MATUSEVICH ALEX , TSAI SHENG-JEN , MURPHY MYLES PATRICK , MCKAY BERNARD
Abstract: The synchronization system uses a TDMA or AMPS air interface to provide timing synchronization between previously unsynchronized base stations. The synchronization of base stations is critical between when determining the geographical position of a mobile because the geographical position is determined using a time difference of arrival method. In order to synchronize a remote base station with a serving base station, the remote base station receives a signal from the serving base station and measuring the receiving time of the signal at the remote base station in relation to the clock of the remote base station. The synchronization system determines the transmission time of the signal based on the reception time of the signa l and the distance between the base stations, in relation to the clock signal of the second station, and synchronizes the clock of the remote base station to the clock of the serving base station based on the offset in the clock cycles at the time the signal was transmitted.
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公开(公告)号：DE60017220D1
公开(公告)日：2005-02-10
申请号：DE60017220
申请日：2000-07-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MCKAY BERNARD , TSAI SHENG-JEN , FALCO STEVEN A , MATUSEVICH ALEX , MURPHY MYLES PATRICK
Abstract: The synchronization system uses a TDMA or AMPS air interface to provide tuning synchronization between previously unsynchronized base stations. The synchronization of base stations is critical between when determining the geographical position of a mobile because the geographical position is determined using a time difference of arrival method. In order to synchronize a remote base station with a serving base station, the remote base station receives a signal from the serving base station and measuring the receiving time of the signal at the remote base station in relation to the clock of the remote base station. The synchronization system determines the transmission time of the signal based on the reception time of the signal and the distance between the base stations, in relation to the clock signal of the second station, and synchronizes the clock of the remote base station to the clock of the serving base station based on the offset in the clock cycles at the time the signal was transmitted.
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公开(公告)号：CA2250559C
公开(公告)日：2002-12-31
申请号：CA2250559
申请日：1998-10-15
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KAHN COLIN LEON , LAMOUREUX PHILIP , MURPHY MYLES PATRICK , HUANG JOE , ZHANG BULIN
Abstract: Sharing the existing sector antennas at the base station each of which corre sponds to one sector of the outer communication coverage area to create an omnidirectional inner communication coverage area. When transmitting or receiving data from a mobi le in one sector of the outer communication coverage area only one antenna is used, and when transmitting or receiving data from a mobile in the inner communication coverage area all th e antennas are used. This allows an increase in capacity of the hybrid inner/outer sectored cell without the additional cost of adding further antennas.
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Patent Agency Ranking
公开(公告)号：BR9803926A
公开(公告)日：1999-12-21
申请号：BR9803926
申请日：1998-10-16
Applicant: LUCENT TECHNOLOGIES INC
Inventor： HUANG JOE , ZHANG BULIN , KAHAN COLIN LEON , LAMOUREUX PHILIP , MURPHY MYLES PATRICK
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公开(公告)号：DE69937932T2
公开(公告)日：2009-02-19
申请号：DE69937932
申请日：1999-08-23
Applicant: LUCENT TECHNOLOGIES INC
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公开(公告)号：CA2278818A1
公开(公告)日：2000-02-29
申请号：CA2278818
申请日：1999-07-26
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MURPHY MYLES PATRICK , SEYMOUR JAMES PAUL , TSAMUTALIS CHRIS CONSTANTINE , TSAI SHENG-JEN , MATUSEVICH ALEX
Abstract: A measurement radio system uses a measurement radio to scan active channels of a base station and produce operating information for the traffic radios servicing the active channels. The measurement radio can produce operating information, such as signal strength, bit error rate (BER), frame error rate (FER) and signal to interference ratio (C/I), which is used to determine whether to change the manner in which the tragic radio is servicing the active channel. For example, if the measurement radio can switch between different sets of antennas, the measurement radio can scan an active voice/data channel using a different set of antennas than the traffic radio is using to service the active channel and determine operating information related to the signal received over the active channel using the different set of antennas. The traffic radio can use the operating information to determine whether to hand off the active channel to the different set of antennas. The measurement radio can determine operating information, such as operating coefficients, parameters or settings, to change how the traffic radio services the active channel.
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公开(公告)号：CA2250559A1
公开(公告)日：1999-04-23
申请号：CA2250559
申请日：1998-10-15
Applicant: LUCENT TECHNOLOGIES INC
Inventor： ZHANG BULIN , LAMOUREUX PHILIP , MURPHY MYLES PATRICK , HUANG JOE , KAHN COLIN LEON
Abstract: Sharing the existing sector antennas at the base station each of which corre sponds to one sector of the outer communication coverage area to create an omnidirectional inner communication coverage area. When transmitting or receiving data from a mobi le in one sector of the outer communication coverage area only one antenna is used, and when transmitting or receiving data from a mobile in the inner communication coverage area all th e antennas are used. This allows an increase in capacity of the hybrid inner/outer sectored cell without the additional cost of adding further antennas.
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公开(公告)号：DE60017220T2
公开(公告)日：2005-12-08
申请号：DE60017220
申请日：2000-07-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： MCKAY BERNARD , TSAI SHENG-JEN , FALCO STEVEN A , MATUSEVICH ALEX , MURPHY MYLES PATRICK
Abstract: The synchronization system uses a TDMA or AMPS air interface to provide tuning synchronization between previously unsynchronized base stations. The synchronization of base stations is critical between when determining the geographical position of a mobile because the geographical position is determined using a time difference of arrival method. In order to synchronize a remote base station with a serving base station, the remote base station receives a signal from the serving base station and measuring the receiving time of the signal at the remote base station in relation to the clock of the remote base station. The synchronization system determines the transmission time of the signal based on the reception time of the signal and the distance between the base stations, in relation to the clock signal of the second station, and synchronizes the clock of the remote base station to the clock of the serving base station based on the offset in the clock cycles at the time the signal was transmitted.
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