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    12.
    发明专利
    未知

    公开(公告)号：BR0102054A

    公开(公告)日：2002-04-23

    申请号：BR0102054

    申请日：2001-05-21

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： GANDHI ASIF D ,  VITEBSKY STANLEY ,  IBANEZ MARC BENEDICT ,  SONG LEI ,  HUANG JOE ,  THOMAS MATHEW

    IPC: H04W72/08 ,  H04Q7/22

    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.

    Method and apparatus for controlling reverse link interference rise and power control instability in wireless system
    14.
    发明专利
    Method and apparatus for controlling reverse link interference rise and power control instability in wireless system 未知

    公开(公告)号：AU6246500A

    公开(公告)日：2001-04-12

    申请号：AU6246500

    申请日：2000-10-04

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： GANDHI ASIF DAWOODI ,  VITEBSKY STANLEY ,  THOMAS MATHEW ,  SONG LEI ,  IBANEZ MARC BENEDICT

    IPC: H04B7/005 ,  H04B7/26 ,  H04Q7/34

    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 Eb/No measurements for served mobiles do not meet target Eb/No 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 Eb/No levels in a centralized manner based on an overall system state so that only a limited number of target Eb/No levels are allowed to increase when frame erasures occur. By preventing a percentage of target Eb/No 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.

    METHOD FOR INITIATING CALL BLOCKING
    15.
    发明专利
    METHOD FOR INITIATING CALL BLOCKING 未知

    公开(公告)号：CA2313554A1

    公开(公告)日：2001-01-19

    申请号：CA2313554

    申请日：2000-07-06

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： THOMAS MATHEW ,  WEAVER CARL FRANCIS ,  GANDHI ASIF DAWOODI ,  EIBLING EDWARD ELLIS ,  KUO WEN-YI

    IPC: H04B7/005 ,  H04B7/14 ,  H04M3/00 ,  H04W52/22 ,  H04W72/08 ,  H04Q7/36

    Abstract: A method that initiates call blocking responsive to a call-quality measureme nt of the forward link. The call-quality measurement is a measurement of how well a mobile terminal is able to receive the forward link. One call-quality measurement is a pilot fraction of the forward link, which is a ratio of the pilot's power level to the power level of a se t of forward-link signals of a base station. Call blocking is initiated when an average pilot fraction is below a pilot-fraction blocking threshold. The pilot's power level is obtained for a time period, a nd the signal set's power level is obtained for the same time period. The pilot fraction i s determined for the time period, and then used to determine the average pilot fraction for the time period. The average pilot fraction for the current time period is based on a pilot fraction for the current time period, and an average pilot fraction for a previous time period. When the average pilot fraction is below the pilot-fraction blocking threshold, call blocking is initiated. The pilot-fraction blocking threshold is preferably based on: 1) the pilot fraction when the ba se station is at full load; 2) the size, shape, and terrain of the cell; and 3) the aggressiveness of the overload control. In the preferred embodiment, the signal set includes allof the signals generated by the base station, alternatively, the signal set can include fewer than all the signal s generated by the base station. If the cell includes several sectors, the call blocking is initiate d on a sector basis when the average pilot fraction of the sector is below the pilot-fraction blockin g threshold. Other call-quality measurements, such as the forward link's frame error rate, the number of dropped calls, or the Power Measurement Report Message (PMRM), can be used, alone or in combination, instead of or in addition to the pilot fraction of the forward link to determine whether call blocking should be initiated. Determining whether call blocking should be initiated using one of the other call-quality measurements is performed in a similar manner as for the pilot fraction. Initiating call blocking using several call-quality measurements involves initiating call blocking when any one of the call-quality measurements indicates that call blocking should be initiated. Alternatively, call blocking can be initiated when several of the call quali ty measurements indicate that call blocking should be initiated.

    17.
    发明专利
    未知

    公开(公告)号：DE60017843D1

    公开(公告)日：2005-03-10

    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

    IPC: H04B1/04 ,  H04B7/005 ,  H04B7/26

    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.

    18.
    发明专利
    未知

    公开(公告)号：DE60102786D1

    公开(公告)日：2004-05-19

    申请号：DE60102786

    申请日：2001-08-14

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： KAMEL RAAFAT E ,  SALVARANI ALEXANDRO ,  THOMAS MATHEW ,  VITEBSKY STANLEY

    IPC: H04B7/005 ,  H04L1/00

    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.

    20.
    发明专利
    未知

    公开(公告)号：BR0005605A

    公开(公告)日：2001-06-12

    申请号：BR0005605

    申请日：2000-09-29

    Applicant: LUCENT TECHNOLOGIES INC

    Inventor： GANDHI ASIF DAWOODI ,  VITEBSKY STANLEY ,  IBANEZ MARC BENEDICT ,  SONG LEI ,  THOMAS MATHEW

    IPC: H04B7/005 ,  H04B7/26 ,  H04Q7/32

    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 Eb/No measurements for served mobiles do not meet target Eb/No 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 Eb/No levels in a centralized manner based on an overall system state so that only a limited number of target Eb/No levels are allowed to increase when frame erasures occur. By preventing a percentage of target Eb/No 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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