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公开(公告)号：JP2000115860A
公开(公告)日：2000-04-21
申请号：JP27790599
申请日：1999-09-30
Applicant: LUCENT TECHNOLOGIES INC
Abstract: PROBLEM TO BE SOLVED: To enhance a successful rate of call transmission by reducing the time required for a mobile unit to update an overhead message before trying an access. SOLUTION: When transmission of an overhead message is scheduled based on a timing decided by a timer (402), an overhead message is selected from a queue (404), and the message is transmitted through a paging channel (412). When transmission of a message is not scheduled in that timing, a base station 400 discriminates whether or not an available mobile oriented message is in existence (406), the base station selects the mobile oriented message when it exists (408), and transmits the message through an interposed slot or slot piece (412). When no available mobile oriented message is in existence, an overhead message is selected from among a queue (410) and the mobile station transmits the message through an interposed slot or a slot piece (412).
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公开(公告)号：JP2000092557A
公开(公告)日：2000-03-31
申请号：JP24423999
申请日：1999-08-31
Applicant: LUCENT TECHNOLOGIES INC
Inventor： JIANG FRANCES , KAMEL RAAFAT EDWARD , KUO WEN-YI
IPC: H04B7/04 , H04B7/26 , H04W16/26 , H04W16/30 , H04W16/32 , H04W36/08 , H04W36/38 , H04Q7/34 , H04Q7/22
Abstract: PROBLEM TO BE SOLVED: To easily expand a cell size or an access range by allowing a base station to instruct handoff based on the absolute route delay information showing the present and past positions of a mobile telephone obtained by signals from the mobile telephone. SOLUTION: The base station 80 is provided with a macro cell 84 and a micro cell 82 having a radius R82 equal to or less than a distance corresponding to the ASIC correlation device bit limitation of a mobile telephone detector. The mobile telephones 86 and 88 measure the pilot signal strength of a first frequency band of the respective base stations and send it to the base station 80. When the signal strength of the first frequency band becomes equal to or less than a threshold, the base station 80 instructs handoff to a second frequency band. In the case that the mobile telephone 86 or 88 can not measure the frequency, the base station 80 detects mobile telephone signals, obtains the absolute route delay information from the arrival time, judges the moving direction of the mobile telephone and instructs when inter-frequency handoff is to be performed. The cell size or the access range is enlarged without re-designing the ASIC correlation device requiring the large amount of costs.
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公开(公告)号：BR0003603A
公开(公告)日：2001-03-13
申请号：BR0003603
申请日：2000-06-27
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KAMEL RAAFAT EDWARD , WEAVER CARL FRANCIS , MEYERS MARTIN HOWARD , WU XIAO CHENG , KUO WEN-YI
Abstract: A power control method of the invention may be applied to downlink power control, uplink power control, or both to support different quality of service levels for multiple channels per a mobile station. The power control method transmits control data between a base station and a multi-channel mobile station on a single communications channel or sub-channel to minimize or reduce overhead traffic from the control data.
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公开(公告)号：CA2311901A1
公开(公告)日：2001-01-19
申请号：CA2311901
申请日：2000-06-16
Applicant: LUCENT TECHNOLOGIES INC
Inventor： WEAVER CARL FRANCIS , THOMAS MATHEW , KAMEL RAAFAT EDWARD , BI QI , EIBLING EDWARD ELLIS , KUO WEN-YI
Abstract: A method that changes the power level of a set of forward-link signals, independent of the individual power control of each of the forward-link signals in the set, responsive to a comparison of the signal set's power level and a threshold power level (P th ). The threshold power level (P th) is based on the base station's (200, 400) amplifier's (15 0) maximum threshold power level. The power level of the set is changed by scaling it by a scalin g factor. The total power level (P[n-1]) of the set is obtained during a current frame, and then the scaling factor (g[n]) that will be used in the subsequent frame is determined. The scaling factor (g[n]) is preferably based on the total power level (P[n-1]) of the set for the curren t frame, a scaling factor (g[n-1]) used during the current frame, and a threshold power level ( P th). The amount by which the total power level exceeds the amplifier's maximum continuous power level is the overload amount. The scaling factor is selected so that for each frame the overload amount is reduced by a percentage. For example, the overload amount can be reduced by 3% for the current frame, then the percentage may be changed for a subsequent frame based on th e scaling factor of the current time period and the overload amount of the subsequent time perio d. The set caninclude all of the signals amplified by the base station's amplif ier (150); alternatively, the set can include fewer than all the signals generated by the base station. For example, the set can include a plurality of the traffic signals, or a plurality of the traffic signals and one or more of the control signals. When the base station includes a plurality of amplifier s, each for amplifying a set of signals, the above process can be performed for each of the sets of signals.
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15.发明专利
公开(公告)号：CA2313167A1
公开(公告)日：2001-01-08
申请号：CA2313167
申请日：2000-06-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KUO WEN-YI , MEYERS MARTIN HOWARD , WU XIAO CHENG , WEAVER CARL FRANCIS , KAMEL RAAFAT EDWARD
Abstract: A power control method of the invention may be applied to downlink power control, uplink power control, or both to support different quality of service levels for multiple channels per a mobile station. The power control method transmits control data between a base station and a multi-channel mobile station on a single communications channel or sub-channel to minimize or reduce overhead traffic from the control data.
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Patent Agency Ranking
公开(公告)号：BR9904341A
公开(公告)日：2000-09-05
申请号：BR9904341
申请日：1999-09-16
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KAMEL RAAFAT EDWARD , WEAVER CARL FRANCIS , MEYERS MARTIN HOWARD , YI-KUO WEN
Abstract: A method and apparatus that permits base stations to adaptively set initial power levels in forward link traffic channels (i.e., base station to mobile unit) based on an interference measure, where the interference measure is the difference between the base station transmitted pilot Ec/Io and the mobile unit received pilot Ec/Io. The interference measure indicates how much interference is present from other base stations in the mobile unit's locale, mobile receiver noise and other similar sources. Call quality and system capacity are optimized since the initial power level is set in accordance with the interference environment. The method of the invention implements the adaptive setting by extracting the mobile unit received pilot Ec/Io from the access message transmitted by the mobile unit. The interference measure is then determined and used by the base station to set the initial power level in the forward link traffic channel.
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公开(公告)号：BR9903882A
公开(公告)日：2000-08-29
申请号：BR9903882
申请日：1999-08-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： JIANG FRANCES , KUO WEN-YI , KAMEL RAAFAT EDWARD
Abstract: The present invention is a method for performing handoffs in wireless communications systems having extended range concentric cell base station, wherein the concentric cell base station has a micro cell and a macro cell that incorporates multiple timing protocols to extend the base station's access range. In one embodiment, the base station determines whether a handoff is to be performed using absolute path delay information, which will indicate the current and previous positions of a mobile-telephone. If the absolute path delay information indicates that the mobile-telephone is moving between the macro cell and the micro cell, or to a cell associated with another base station, the current base station will instruct the mobile-telephone to perform a handoff to the frequency band associated with the micro cell, macro cell or base station to which the mobile-telephone is traveling towards.
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公开(公告)号：CA2278830A1
公开(公告)日：2000-02-29
申请号：CA2278830
申请日：1999-07-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KUO WEN-YI , JIANG FRANCES , KAMEL RAAFAT EDWARD
Abstract: The present invention is a method for performing handoffs in wireless communications systems having extended range concentric cell base station, wherein the concentric cell base station has a micro cell and a macro cell that incorporates multiple timing protocols to extend the base station's access range. In one embodiment, the base station determines whether a handoff is to be performed using absolute path delay information, which will indicate the current and previous positions of a mobile-telephone. If the absolute path delay information indicates that the mobile-telephone is moving between the macro cell and the micro cell, or to a cell associated with another base station, the current base station will instruct the mobile-telephone to perform a handoff to the frequency band associated with the micro cell, macro cell or base station to which the mobile-telephone is traveling towards.
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公开(公告)号：DE60020471T2
公开(公告)日：2006-03-23
申请号：DE60020471
申请日：2000-09-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： KAMEL RAAFAT EDWARD , MEYERS MARTIN HOWARD , WEAVER CARL FRANCIS , WU XIAO CHENG
Abstract: A base station (312, 314, 316, 612, 614, 616) in a soft handoff adjusts its transmit power level by a first amount if the base station (312, 314, 316, 612, 614, 616) is participating in a soft handoff and by a second amount if the base station (312, 314, 316, 612, 614, 616) is not participating in the soft handoff, i.e. in simplex mode. The first and second amounts are different. In one embodiment of the invention, the adjustment is performed by using a down-step size that is larger in magnitude than an up-step size when the base station (312, 314, 316, 612, 614, 616) is in soft handoff. The transmit power level is then adjusted by the smaller up and larger down step sizes when the base station (312, 314, 316, 612, 614, 616) receives an indication to adjust the transmit power level. The step sizes used when the base station (312, 314, 316, 612, 614, 616) is in simplex mode is larger than the up-step size and smaller than the down step size. In another embodiment, when the base station (312, 314, 316, 612, 614, 616) is in soft handoff, the adjustment is performed by adjusting the transmit power level by the same step size as used during simplex mode when the base station (312, 314, 316, 612, 614, 616) receives an indication to adjust the transmit power level and then reducing the result by a reduction amount. The order of these two steps can be reversed, and the transmit power level can be first reduced by the reduction amount and then adjusted by the same step sizes as used during simplex mode. The reduction amount has a magnitude greater than zero and smaller than the step size. The method of adjusting the base station transmit power level by different amounts based on whether the base station (312, 314, 316, 612, 614, 616) participating in a soft handoff can be used with the method of programming each base station (312, 314, 316, 612, 614, 616) in a soft handoff with a threshold power level to constrain the power transmitted by the base station (312, 314, 316, 612, 614, 616) on the forward link. When the threshold power level is a minimum-threshold power level, each base station (312, 314, 316, 612, 614, 616) maintains its transmit power level at or above the minimum-threshold power level. When the threshold power level is a maximum-threshold power level, each base station (312, 314, 316, 612, 614, 616) maintains its transmit power level at or below the maximum-threshold power level. The threshold power level can be either an adjustable or a fixed threshold power level.
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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
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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