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公开(公告)号：JP2001078269A
公开(公告)日：2001-03-23
申请号：JP2000214300
申请日：2000-07-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： EIBLING EDWARD ELLIS , GANDHI ASIF DAWOODI , KUO WEN-YI , THOMAS MATHEW , WEAVER CARL FRANCIS
Abstract: PROBLEM TO BE SOLVED: To provide a call blockade start method in call reception control in a radio system. SOLUTION: In a method for starting call blockade in response to a pilot fraction as a call quality measurement value in a base station 200 in a radio system, a sampling square integral circuit 202 obtains a power level based on a current time length, a sampling square integral circuit 204 obtains a power level of a pilot based on the current time length and the both the power levels are fed to a 1st averaging element 210. The 1st averaging element 210 decides a mean pilot fraction based on the current time length from both the power levels. The comparator 220 compares the mean pilot fraction and a pilot fraction blockage threshold value and a controller 240 uses a call reception program to start call blockade in response to the case that the mean pilot fraction is smaller than the pilot fracture blockage threshold value. A frame error rate may be used in place of the pilot fraction for a call quality measurement value.
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2.发明专利
公开(公告)号：JP2002112329A
公开(公告)日：2002-04-12
申请号：JP2001277361
申请日：2001-09-13
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GANDHI ASIF DAWOODI , KAMEL RAAFAT EDWARD , THOMAS MATHEW , VITEBSKY STANLEY , WEAVER CARL FRANCIS
Abstract: PROBLEM TO BE SOLVED: To provide a method for promoting the maintenance of a performance target of an inverse link by deciding the time when a request at a high transmission rate is permitted for a mobile station having an access to a communication system at present. SOLUTION: The method for deciding the time when a mobile station can have an access to a high transmission rate includes the acquisition of a 1st estimated performance indicator and a 2nd estimated performance indicator with respect to an inverse link of a base station to which the mobile station accesses at present. A blocking threshold (32) is established. Accessing at a requested high transmission rate is conducted on the basis of comparing the 1st indicator and the 2nd indicator with the established blocking threshold. In the case that an access at a requested high rate is rejected, an access at a 2nd higher rate not deteriorating the performance of the wireless communication system is permitted.
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公开(公告)号：JP2001177472A
公开(公告)日：2001-06-29
申请号：JP2000307043
申请日：2000-10-06
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GANDHI ASIF DAWOODI , IBANEZ MARC BENEDICT , SONG LEI , THOMAS MATHEW , VITEBSKY STANLEY
Abstract: PROBLEM TO BE SOLVED: To provide a system that can deal with a rapid increase in an interference state by taking the effect on entire system performance into account. SOLUTION: A power control processor 24 in a transmitter-receiver 20 of a base station 10 receives a plurality of measured values from a receiver demodulator unit 22 and uses it to detect a symptom of an increased interference state and to generate a power adjustment command to each mobile terminal handled by the base station. Furthermore, the power control processor 24 utilizes the power control algorithm on system reference or power centralization basis when detecting an increased interference state. Thus, the entire system quality can be maintained by deteriorating call quality of each mobile terminal.
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公开(公告)号：JPH11298423A
公开(公告)日：1999-10-29
申请号：JP712299
申请日：1999-01-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHENG TERRY SI-FONG , GANDHI ASIF DAWOODI
Abstract: PROBLEM TO BE SOLVED: To obtain an accurate index of link balance at a low cost without the need for time-consuming re-configuration of the system. SOLUTION: In this measurement method, a test setup 30 that simulates many system configurations measures link performance of a CDMA(code division multiple access) personal communication system, a cellular system or other type of radio system. The measurement device includes a 1st attenuator that is placed in a common part of a reception line and a transmission line of a mobile station 32 that is moved in any system and a 2nd attenuator that is placed to either of a reception dedicated part of the reception line and a transmission dedicated part of the transmission line. The attenuation given by the 1st and 2nd attenuators is separated so as to introduce a different attenuation to the transmission line and the reception line, and the performance of a forward link and a reverse link of the system is measured while changing at least one attenuation of the 1st and 2nd attenuates, Since the configuration can separate the attenuation in the reverse link, the link balance state is efficiently and accurately decided.
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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
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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Patent Agency Ranking
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：BR0001882A
公开(公告)日：2000-10-31
申请号：BR0001882
申请日：2000-04-12
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GANDHI ASIF DAWOODI , NARDOZZA GREGG SCOTT
Abstract: A set of N random numbers is generated with each number corresponding to a channel number and the numbers are partitioned into sectors, each corresponding to a geographical region served by one base station, before channels are assigned to each base station according to the partitioned set of numbers. If there are two channel numbers in any sector whose difference is equal to or less than a predetermined number n, they are separated into different sectors. An independent claim is included for apparatus for assigning N frequency channels for use by base stations.
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公开(公告)号：BR9900003A
公开(公告)日：1999-12-28
申请号：BR9900003
申请日：1999-01-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHENG TERRY SI-FONG , GANDHI ASIF DAWOODI
Abstract: Link performance is measured in a code division multiple access (CDMA) personal communication service (PCS) or cellular system, or other type of wireless system, using a test set-up (30) which permits the simulation of various changes in system configuration. An illustrative embodiment includes a first attenuator (36) arranged in a common portion of a receive path and a transmit path of a mobile station (32) of the system, and a second attenuator (40) arranged in either a receive-only portion of the receive path or a transmit-only portion of the transmit path. The amounts of attenuation provided by the first and second attenuators are decoupled such that a different amount of attenuation can be provided on the transmit path than on the receive path. Performance of forward and reverse links of the system are measured while varying a value of at least one of the first or second attenuators. For a given measurement, the attenuator values may be selected to simulate performance of the system in a configuration in which base station amplifier power is increased or decreased. As another example, the attenuator values may be selected to simulate performance of the system in a configuration in which cell size is increased. This arrangement of decoupled forward and reverse link attenuation in accordance with the invention permits efficient and accurate determination of link balance conditions.
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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
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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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
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.
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