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公开(公告)号：JP2000091988A
公开(公告)日：2000-03-31
申请号：JP25301899
申请日：1999-09-07
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BERNSTEIN NEIL E , WU XIAO CHENG
Abstract: PROBLEM TO BE SOLVED: To minimize an overlap of pilot signals and an inter-cell interference by setting the transmission power level of a base station according to reference pilot investigation data, base station initial traffic load information, and pilot coverage calculated from a 1st and a 2nd control factor. SOLUTION: The initial transmission Ec/Io of the base station is determined. New Ec/Io is calculated from the last Ec/Io data and cell traffic information. Variation in pilot coverage is determined by using the reference pilot investigation data, initial transmission Ec/Io of the base station 14, and the relation between two control factors. According to variation in cell transmission power or traffic load variation, the Ec/Io is calculated on the basis of the cell traffic load data. Optimum base station power setting calculation under traffic channel load conditions is repeated by using the control factors, etc., to obtain sets of optimized transmission power settings, and one optimum set is selected for each base station.
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公开(公告)号：JP2000013842A
公开(公告)日：2000-01-14
申请号：JP8301399
申请日：1999-03-26
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BERNSTEIN NEIL E , KUO WEN-YI , MEYERS MARTIN HOWARD , WANG XIAO , WEAVER CARL FRANCIS , WU XIAO CHENG
Abstract: PROBLEM TO BE SOLVED: To avoid unnecessary tuning and searching with a new frequency by controlling the hand-off from the frequency of a call under processing to the new frequency by means of a trigger metric that is obtained as a function of total sum of the mean transmission signal/noise ratio measurements. SOLUTION: A processor 36 controls the communication function of a mobile station 12 in cooperation with a memory 38. For instance, the data included in a message forming a part of a receiving signal or other information are supplied to the processor 36 and a process step is executed. Then the electric power and the signal/noise ratio are measured to the receiving signal, and a message is generated, inserted into a transmitting signal and transmitted to one or plural base stations. Then the hand-off is controlled to the new frequency from the present frequency of a call under processing using a trigger metric generated as a function of the total sum of average transmission signal to noise ratio measurements to at least a subset of the average transmission signal to noise ratio measurements to a pilot signal and a plurality of pilot signals.
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公开(公告)号：DE69938281T2
公开(公告)日：2009-05-20
申请号：DE69938281
申请日：1999-08-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BERNSTEIN NEIL E , WU XIAO CHENG
Abstract: A method and system that minimizes pilot signal overlap and radio frequency ("RF") interference by estimating changes in pilot coverage for different traffic channel loading and power conditions. Once base stations are positioned, a terminal for measuring received pilot signal strengths, such as a mobile station or pilot scanner, is used to collect and generate the baseline pilot survey data, which is then stored on a disk or tape. Base station transmit pilot EC/IOs, i.e., traffic channel loads on forward links, are also stored on disk or tape. The invention uses two adjustment factors associated with transmit power and traffic channel loading to optimize for different RF conditions, specifically for different base station transmit power or forward link loading conditions. For each RF condition, the methodology calculates the changes in the baseline pilot survey data. This reflects what EC/IOs a mobile station would receive under the given conditions. The systems engineer collects a set of optimized base station power settings for each of the different traffic channel load conditions. One of these optimized power settings is then selected by the systems engineer for each of the base stations.
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公开(公告)号：AU4586499A
公开(公告)日：2000-03-16
申请号：AU4586499
申请日：1999-09-01
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BERNSTEIN NEIL E , WU XIAO CHENG
Abstract: A method and system that minimizes pilot signal overlap and radio frequency ("RF") interference by estimating changes in pilot coverage for different traffic channel loading and power conditions. Once base stations are positioned, a terminal for measuring received pilot signal strengths, such as a mobile station or pilot scanner, is used to collect and generate the baseline pilot survey data, which is then stored on a disk or tape. Base station transmit pilot EC/IOs, i.e., traffic channel loads on forward links, are also stored on disk or tape. The invention uses two adjustment factors associated with transmit power and traffic channel loading to optimize for different RF conditions, specifically for different base station transmit power or forward link loading conditions. For each RF condition, the methodology calculates the changes in the baseline pilot survey data. This reflects what EC/IOs a mobile station would receive under the given conditions. The systems engineer collects a set of optimized base station power settings for each of the different traffic channel load conditions. One of these optimized power settings is then selected by the systems engineer for each of the base stations.
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公开(公告)号：DE69934731T2
公开(公告)日：2007-10-11
申请号：DE69934731
申请日：1999-03-16
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BERNSTEIN NEIL E , KUO WEN YI , MEYERS MARTIN HOWARD , WANG XIAO , WEAVER CARL FRANCIS , WU XIAO CHENG
IPC: H04W36/14
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 "ping-ponging" 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.
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Patent Agency Ranking
公开(公告)号：DE69934731D1
公开(公告)日：2007-02-22
申请号：DE69934731
申请日：1999-03-16
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BERNSTEIN NEIL E , KUO WEN YI , MEYERS MARTIN HOWARD , WANG XIAO , WEAVER CARL FRANCIS , WU XIAO CHENG
IPC: H04W36/14
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 "ping-ponging" 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.
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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
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.
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公开(公告)号：DE69938281D1
公开(公告)日：2008-04-17
申请号：DE69938281
申请日：1999-08-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BERNSTEIN NEIL E , WU XIAO CHENG
Abstract: A method and system that minimizes pilot signal overlap and radio frequency ("RF") interference by estimating changes in pilot coverage for different traffic channel loading and power conditions. Once base stations are positioned, a terminal for measuring received pilot signal strengths, such as a mobile station or pilot scanner, is used to collect and generate the baseline pilot survey data, which is then stored on a disk or tape. Base station transmit pilot EC/IOs, i.e., traffic channel loads on forward links, are also stored on disk or tape. The invention uses two adjustment factors associated with transmit power and traffic channel loading to optimize for different RF conditions, specifically for different base station transmit power or forward link loading conditions. For each RF condition, the methodology calculates the changes in the baseline pilot survey data. This reflects what EC/IOs a mobile station would receive under the given conditions. The systems engineer collects a set of optimized base station power settings for each of the different traffic channel load conditions. One of these optimized power settings is then selected by the systems engineer for each of the base stations.
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公开(公告)号：BR9904034A
公开(公告)日：2000-09-12
申请号：BR9904034
申请日：1999-09-02
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BERNSTEIN NEIL E , WU XIAO CHENG
Abstract: A method and system that minimizes pilot signal overlap and radio frequency ("RF") interference by estimating changes in pilot coverage for different traffic channel loading and power conditions. Once base stations are positioned, a terminal for measuring received pilot signal strengths, such as a mobile station or pilot scanner, is used to collect and generate the baseline pilot survey data, which is then stored on a disk or tape. Base station transmit pilot EC/IOs, i.e., traffic channel loads on forward links, are also stored on disk or tape. The invention uses two adjustment factors associated with transmit power and traffic channel loading to optimize for different RF conditions, specifically for different base station transmit power or forward link loading conditions. For each RF condition, the methodology calculates the changes in the baseline pilot survey data. This reflects what EC/IOs a mobile station would receive under the given conditions. The systems engineer collects a set of optimized base station power settings for each of the different traffic channel load conditions. One of these optimized power settings is then selected by the systems engineer for each of the base stations.
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公开(公告)号：CA2279626A1
公开(公告)日：2000-03-08
申请号：CA2279626
申请日：1999-08-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： WU XIAO CHENG , BERNSTEIN NEIL E
Abstract: A method and system that minimizes pilot signal overlap and radio frequency ("RF") interference by estimating changes in pilot coverage for different traffic channel loading and ower conditions. Once base stations are positioned, a terminal for measuring received pilot signal strengths, such as a mobile station or pilot scanner, is used to collect and generate the baseline pilot survey data, which is then stored on a disk or tape. Base station transmit pilot Ec/I o s, i.e., traffic channel loads on forward links, are also stored on disk or tape. The invention uses two adjustment factors associated with transmit power and traffic channel loading to optimize for different RF conditions, specifically for different base station transmit power or forward link loading conditions. For each RF condition, the methodology calculates the changes in the baseline pilot survey data. This reflects what Ec/I o s a mobile station would receive under the given conditions. The systems engineer collects a set of optimized base station power settings for each of the different traffic channel load conditions. One of these optimized power settings is then selected by the systems engineer for each of the base stations.
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