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公开(公告)号：JP2002044721A
公开(公告)日：2002-02-08
申请号：JP2001160189
申请日：2001-05-29
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GANDHI ASIF D , HUANG JOE , IBANEZ MARC BENEDICT , SONG LEI , THOMAS MATHEW , VITEBSKY STANLEY
Abstract: PROBLEM TO BE SOLVED: To control access to an uplink link so as to prevent increase of failed access of subscriber's terminals to a radio communication system. SOLUTION: To easily maintain the target performance an uplink and a desired service area map of the uplink, and control an access by a subscriber terminal 24 to the radio communication system 11, a radio communication system 11 measures a first and a second performance indicator for the uplink to a base station 10 which the subscriber terminal 24 is searching for so as to access. A blocking threshold is established based on the second performance indicator. The radio communication system 11 determines whether or not to allow access by subscriber terminal 24 based on a comparison between the measured first performance indicator and the established blocking threshold.
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公开(公告)号：JPH11215055A
公开(公告)日：1999-08-06
申请号：JP30183698
申请日：1998-10-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： HUANG JOE , KAHN COLIN LEON , LAMOUREUX PHILIP , MURPHY PATRICK MYLES , ZHANG BULIN
Abstract: PROBLEM TO BE SOLVED: To improve the capability of hybrid inner/outer sectoring cell, without increasing cost and antennas by allocating existing sector antennas to a base station-side used for the sectors of outer communication cover areas for generating a nondirectional inner communication cover area. SOLUTION: A hybrid inner/outer sectoring cell 100 is constituted of inner/ outer communication cover areas 112/114 which are obtained by dividing it into an omnisector structure 112 and sectors 116, 118 and 120. Moving auxiliary hand-off is used without digital movement for hand-off between the sectors of the sectoring cell 100 and between the sectoring cells 100. The base station of the sectoring cell 100 communicates the signal of the cover area 112 with three existing nondirectional sector antennas at the same time which the base station uses for the cover areas 114. Thus, the increase in cost and space are eliminated by the use of the existing antennas.
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公开(公告)号：JPH11331930A
公开(公告)日：1999-11-30
申请号：JP5782299
申请日：1999-03-05
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BORST SIMON C , CHENG TERRY SI-FONG , GRANDHI SUDHEER A , HUANG JOE , KAHN COLIN L , KUMARAN KRISHNAN , ZHANG BULIN B
Abstract: PROBLEM TO BE SOLVED: To attain effective allocation of dynamic channels by using a combination of hybrid of a measurement based DCA algorithm such as cost function based dynamic channel allocation DCA and of a reuse-distance standard algorithm. SOLUTION: A hybrid flexible channel allocation includes a measurement based dynamic channel allocation MBDCA part mounted at each cell site 102 and a cost function based dynamic channel allocation CFBDCA part of a reuse- distance standard mounted in a center data base of a mobile switching center MCB 104. At the MBDCA part, candidate channels defined to the flexible allocation are sequentially sent to the CFBDCA part operating via the center data base according to the usable up-link and down-link interference measurement value. Then a relevant channel selects one of allocation candidate channels based on its use degree set by a neighboring or nearby cell. Furthermore, a channel candidate list is collected at the site 102 based on the use information on the selected channel.
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4.发明专利
公开(公告)号：JP2001244881A
公开(公告)日：2001-09-07
申请号：JP2001010947
申请日：2001-01-19
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHENG TERRY SI-FONG , HUANG JOE , MISRA APARAJITA , MURPHY KEVIN JOHN
Abstract: PROBLEM TO BE SOLVED: To provide an improved down-link power control system which reduces interference in a time division multiple access system resulting in power consumption increasing mutual channel interference and also increases radio system capacity. SOLUTION: A method for controlling the down-link power of a time division multiple radio system can provide different down-link transmission signal power which is different to the different time division multiple channels of a single carrier. A base station receives signal parameter data measured as to the down- link transmission signals of time division multiple channels. When the measured signal parameter data are different from the target signal parameter data, the base station determines the initial adjustment of the down-link transmission signal power of the time-division multiple channels. The base station determines the corrected adjustment of the down-link transmission power of the time- division multiple channels based upon the initial adjustment and at least one adjustment range which is adequate to achieve synchronism of the demodulation of a down-link transmission signal.
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公开(公告)号：JPH11331929A
公开(公告)日：1999-11-30
申请号：JP5634899
申请日：1999-03-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BORST SIMON C , GRANDHI SUDHEER A , HUANG JOE , KAHN COLIN L , KUMARAN KRISHNAN , ZHANG BULIN B
Abstract: PROBLEM TO BE SOLVED: To perform effective channel allocation by applying a reuse distance reference algorithm to a candidate channel list generated by a measurement based dynamic channel allocation MBDCA algorithm against a new call and selecting a channel corresponding to the new call. SOLUTION: A flexible channel allocation scheme is a hybrid algorithm and selects an optimum channel to be allocated to a cellular call based on a dynamic channel allocation MBDCA algorithm of a measurement base using an interference signal measurement value obtained in base stations 201 and 202, and on a reuse distance reference algorithm using information stored in a data base contained in a mobile object switching center MSC which performs switching between the mobile objects 203 and 204. In an MBDCA scheme, a channel is allocated to a call when the channel satisfies a prescribed call quality standard. The MBDCA scheme is applicable to both traffic and interference and more excellent in terms of the system capacity than a dynamic channel allocation scheme that is based only on a reuse distance reference.
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Patent Agency Ranking6.发明专利
公开(公告)号：JP2002135205A
公开(公告)日：2002-05-10
申请号：JP2001287725
申请日：2001-09-20
Applicant: LUCENT TECHNOLOGIES INC
Inventor： AIKEN RICHARD THOMAS , HUANG JOE
Abstract: PROBLEM TO BE SOLVED: To utilize system resources more efficiently by utilizing the fact that electromagnetic fields of the same frequency directed toward a plurality of mobile terminals not only interfere to weaken but also be strengthened at all positions over the entire sector in wireless communication system. SOLUTION: The quantity of energy directed in the azimuth direction of a terminal (e.g. a mobile terminal) is the function of the position and allowable receiving strength of at least two mobile terminals. The allowable receiving strength of a mobile terminal is the strength of electromagnetic field required for that mobile terminal to receive a signal with a signal performance of allowable level. This function makes the strength of electromagnetic field, at any position of these mobile terminals at least equal to the strength required for that mobile terminal, so as to receive a signal transmitted by that electromagnetic field with an allowable level (but not to exceed that level substantially).
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公开(公告)号：JP2001069549A
公开(公告)日：2001-03-16
申请号：JP2000213584
申请日：2000-07-14
Applicant: LUCENT TECHNOLOGIES INC
Inventor： HUANG CHING YAO , HUANG JOE , WU I-FONG ANTONIO , WU XIAO CHENG , YU BEE YUN
Abstract: PROBLEM TO BE SOLVED: To reduce the call loss rate under a radio frequency(RF) environment that varies dynamically by selecting the specific value of an additional parameter according to a decided quality standard, so as to use 1st and additional handoff parameters in a soft handoff process. SOLUTION: A system 10 includes a mover (MS) 12 and base stations BS1-BS4. It is decided whether the parameter selection rule of a part 1 is started with respect to at least one of members included in an active set. When this rule is started to the member, this rule is started to all members of the active set. Thus, the specific value of an additional parameter is selected according to a decided quality standard, so that the 1st and additional handoff parameters are used in a soft handoff process.
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公开(公告)号：JPH11331931A
公开(公告)日：1999-11-30
申请号：JP7467199
申请日：1999-03-19
Applicant: LUCENT TECHNOLOGIES INC
Inventor： GRANDHI SUDHEER A , HUANG JOE , KAHN COLIN L , KUMARAN KRISHNAN , ZHANG BULIN B
Abstract: PROBLEM TO BE SOLVED: To preferentially maintain a mobile object on a cell to support the specific service of a specific private system, etc., by returning the configuration information on an existing cell having signal intensity higher than the designated threshold to a new cell that is added in a cellular system. SOLUTION: A new cell measures the signal intensity on a down-channel to produce a candidate channel list and maintains only the channels having signal intensity higher than the designated threshold in sequence and according to the signal intensity. Then the new cell sends a request to a center data base of a mobile object switching center, starts transmitting with the test frequency that is not used by other cells and asks an adjacent cell to measure the test frequency to identify the neighbors of the measurement value larger than its threshold. Then a configuration information message concerning every neighbor is sent to the new cell. Thus, the new cell can operate. Thereafter, a neighbor list is periodically reconfigured based on the down-link measurement value obtained at a cell site and the measurement value received from a mobile object.
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公开(公告)号：JPH11313365A
公开(公告)日：1999-11-09
申请号：JP5634999
申请日：1999-03-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BORST SIMON C , GRANDHI SUDHEER A , HUANG JOE , KAHN COLIN L , KUMARAN KRISHNAN , ZHANG BULIN B
Abstract: PROBLEM TO BE SOLVED: To improve the dynamic assignment of channels by using a cost table that assigns a prescribed channel to a 1st sector or cell and using each entry of a busy channel table that denotes whether or not a prescribed sector or cell is in use at present so as to produce a cost required for using a channel again. SOLUTION: A function CFBDCA is operated in combination with a function MBDCA and corrects incomplete and inaccurate signal measurement information of the function MBDCA mainly. The algorithm of the function CFEDCA is loaded even when an object selected by the function MBDCA is in existence or not. The algorithm of the function CFBDCA uses a database so as to avoid too many cells/sectors adjacent to the cell/sector where the object channel is surely in use and the function CFBDCA aids correction of missing of measurement of downlink interference in a mobile location.
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公开(公告)号：DE60105108D1
公开(公告)日：2004-09-30
申请号：DE60105108
申请日：2001-04-09
Applicant: LUCENT TECHNOLOGIES INC
Inventor： AIKEN RICHARD THOMAS , HUANG JOE
Abstract: Method and apparatus for directing energy in a plurality of azimuth directions. The amount of energy directed in the azimuth direction of a mobile terminal (130,140,150) is a function of the location and acceptable receive strength of at least two mobile terminals (130,140,150). The function is such that the strength of an EM field at the location of any of these two mobile terminals (130,140,150) is at least as large as, but not significantly larger than, needed for that mobile terminal (130,140,150) to acceptably receive the signal carried by the EM field. The amount of energy to be directed in the azimuth direction of a mobile terminal (130,140,150) is arrived at by first determining for each one of the mobile terminals (130,140,150) an EM field that would have to be generated for the mobile terminal (130,140,150) in order to provide an acceptable receive strength thereat, the determining taking into account the strength, at the location of the mobile terminal (130,140,150), of EM fields previously determined for others of the mobile terminals (130,140,150). This determining is repeated until the EM fields determined for at least two of the mobile terminals (130,140,150) provide an EM field strength for each of these two mobile terminals (130,140,150) that is substantially equal to its adequate receive strength. This determining is repeated until the EM fields converge. The amount of energy is then determined based on the EM fields thus determined.
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