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公开(公告)号：CA2322236A1
公开(公告)日：2001-04-06
申请号：CA2322236
申请日：2000-10-03
Applicant: LUCENT TECHNOLOGIES INC
Inventor： THOMAS MATHEW , SONG LEI , IBANEZ MARC BENEDICT , GANDHI ASIF DAWOODI , VITEBSKY STANLEY
Abstract: A system and a method for reverse link power control in a wireless communications network generates power adjust commands for mobiles being served by a network base station in a centralized manner by considering overall system performance when an increased interference condition is detected. In one implementation, a base station power control processor adopts a modified reverse inner loop power control (RILPC) and/or a reverse outer loop power control (ROLPC) algorithm when an increased interference condition is detected. According to the modified RILPC algorithm, a percentage of power-up adjust commands which would normally be generated when E b/N o measurements for served mobiles do not meet target E b/N o levels are converted to power down-adjust commands, thereby forcing some mobiles to reduce transmit power, at least temporarily, to constrain interference. When the increased interference condition persists, the percentage of power-up adjust commands which are converted to power-down commands may be changed. According to the modified ROLPC algorithm, the power control processor adjusts target E b/N o levels in a centralized manner based on an overall system state so that only a limited number of target E b/N o levels are allowed to increase when frame erasures occur. By preventing a percentage of target E b/N o level increases, at least temporarily, when frame erasures occur, a percentage of power up-adjust commands are avoided. Therefore, a similar effect to that achieved by the modified RILPC is achieved. In accordance with still a further implementation of the present invention, the modified RILPC algorithm may be used in combination with the modified ROLPC algorithm to provide greater resistance to increased interference conditions.
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公开(公告)号：DE60044326D1
公开(公告)日：2010-06-17
申请号：DE60044326
申请日：2000-10-03
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GANDHI ASIF D , IBANEZ MARC BENEDICT , SONG LEI , THOMAS MATHEW , VITEBSKY STANLEY
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公开(公告)号：DE60017843T2
公开(公告)日：2006-05-18
申请号：DE60017843
申请日：2000-09-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： EIBLING EDWARD ELLIS , KAMEL RAAFAT EDWARD , KUO WEN-YI , THOMAS MATHEW , WEAVER CARL FRANCIS
Abstract: A method that adjusts the power level of a set of forward-link signals of a base station responsive to the loading of the forward link as determined by a power level measurement of the signal set. One power level measurement is a pilot fraction of the forward link. Other power level measurements, such as the signal set's power level, can be used, alone or in combination, instead of or in addition to the pilot fraction of the forward link to adjust the power level of the signal set. The power level of the signal set can be changed in any manner, including by scaling it by a scaling factor, or by increasing the power level by a fixed or a variable amount. The power level measurement of the signal set is obtained during a current time period. The scaling factor that will be used in the subsequent time period is determined using the power level measurement. In one embodiment of the invention, the scaling factor can be obtained from a look-up table that is based on the power level measurement. If the cell containing the base station includes several sectors, the power level of the signal set in a sector is adjusted when the power level measurement in that sector indicates that the power level should be adjusted.
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Patent Agency Ranking
公开(公告)号：DE60102786T2
公开(公告)日：2005-04-21
申请号：DE60102786
申请日：2001-08-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KAMEL RAAFAT E , SALVARANI ALEXANDRO , THOMAS MATHEW , VITEBSKY STANLEY
Abstract: A method and apparatus estimate the initial power level and transmission rate of a burst on a secondary channel (182) when the secondary channel (182) is on fewer legs (132) of a handoff, such as a soft or softer handoff, than the primary channel (162, 164, 166). In accordance with the present invention, the initial power level of the burst transmitted over a current secondary channel (182) on a particular leg(s) is a function of a power level of a previous burst transmitted over a previous secondary channel on the identical leg(s) (132) as the current secondary channel (182). For example, the initial power level of the burst can be based on the power level at the end of the previous burst shortly prior to the termination of the previous burst, where the termination of the previous burst was within a predetermined time interval of the start of the burst. Optionally, the initial power level of a burst can also be additionally adjusted based on characteristics of the communication link of the primary channel (162), the previous secondary channel, and the current secondary channel (182). The transmission rate may then be adjusted based on the initial power level determined as described above to obtain a more efficient transmission rate.
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公开(公告)号：CA2317293C
公开(公告)日：2004-10-26
申请号：CA2317293
申请日：2000-08-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： EIBLING EDWARD ELLIS , WEAVER CARL FRANCIS , THOMAS MATHEW , KUO WEN-YI , KAMEL RAAFAT EDWARD
Abstract: A method that adjusts the power level of a set of forward-link signals of a base station responsive to the loading of the forward link as determined by a power level measurement of the signal set. One power level measurement is a pilot fraction of the forward link. Other power level measurements, such as the signal set's power level, can be used, alone or in combination, instead of o r in addition to the pilot fraction of the forward link to adjust the power level of the signal set. The power level of the signal set can be changed in any manner, including by scaling it by a scaling factor, or by increasing the power leve l by a fixed or a variable amount. The power level measurement of the signal set is obtained during a current time period. The scaling factor that will be used in the subsequent time period is determined using the power level measurement. In one embodiment of the invention, the scaling factor can be obtained from a look-up table that is based on the power level measurement. If the cell containing the base station includes several sectors, the power level of the signal set in a sector is adjusted when the power level measurement in that sector indicates that t he power level should be adjusted.
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公开(公告)号：AU4622001A
公开(公告)日：2001-12-06
申请号：AU4622001
申请日：2001-05-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GANDHI ASIF D , HUANG JOE , IBANEZ MARC BENEDICT , SONG LEI , THOMAS MATHEW , VITEBSKY STANLEY
Abstract: A method for controlling access of a subscriber station to a wireless communications system facilitates the maintenance of a performance target of the reverse link and desired geographic coverage of the reverse link. The method for controlling access of a subscriber station to a wireless communications system includes measuring a first performance indicator and a second performance indicator for a reverse link associated with a subscriber station seeking access to a wireless communications system. A blocking threshold value is established based upon the measured second performance indicator and may be adjusted to allow more or less blocking based on any additional metrics that characterize the performance of the current subscriber stations. The decision to grant or deny access of the subscriber station to the wireless communications system is determined based on a comparison of the measured first performance indicator to the established blocking threshold value.
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公开(公告)号：CA2342730A1
公开(公告)日：2001-11-30
申请号：CA2342730
申请日：2001-04-02
Applicant: LUCENT TECHNOLOGIES INC
Inventor： IBANEZ MARC BENEDICT , SONG LEI , VITEBSKY STANLEY , THOMAS MATHEW , GANDHI ASIF DAWOODI , HUANG JOE
Abstract: A method for controlling access of a subscriber station to a wireless communications system facilitates the maintenance of a performance target of the reverse link and desired geographic coverage of the reverse link. The method for controlling access of a subscriber station to a wireless communications syst em includes measuring a first performance indicator and a second performance indicator f or a reverse link associated with a subscriber station seeking access to a wireless communications system. A blocking threshold value is established based upon the measured second performance indicator and may be adjusted to allow more or less blocking bas ed on any additional metrics that characterize the performance of the current subscrib er stations. The decision to grant or deny access of the subscriber station to the wirele ss communications system is determined based on a comparison of the measured first performance indicator to the established blocking threshold value.
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公开(公告)号：CA2317293A1
公开(公告)日：2001-03-14
申请号：CA2317293
申请日：2000-08-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KUO WEN-YI , KAMEL RAAFAT EDWARD , WEAVER CARL FRANCIS , EIBLING EDWARD ELLIS , THOMAS MATHEW
Abstract: A method that adjusts the power level of a set of forward-link signals of a base station responsive to the loading of the forward link as determined by a power level measurement of the signal set. One power level measurement is a pilot fraction of the forward link. Other power level measurements, such as the signal set's power level, can be used, alone or in combination, instead of o r in addition to the pilot fraction of the forward link to adjust the power level of the signal set. The power level of the signal set can be changed in any manner, including by scaling it by a scaling factor, or by increasing the power leve l by a fixed or a variable amount. The power level measurement of the signal set is obtained during a current time period. The scaling factor that will be used in the subsequent time period is determined using the power level measurement. In one embodiment of the invention, the scaling factor can be obtained from a look-up table that is based on the power level measurement. If the cell containing t he base station includes several sectors, the power level of the signal set in a sector is adjusted when the power level measurement in that sector indicates that t he power level should be adjusted.
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