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31. 发明专利

DE69329215D1 未知
公开(公告)号：DE69329215D1
公开(公告)日：2000-09-21
申请号：DE69329215
申请日：1993-05-13
申请人： AT & T CORP
发明人： BENVENISTE MATHILDE
IPC分类号： H04W16/04 , H04W16/06 , H04Q7/22 , H04B7/26
摘要： A channel assignment system assigns channels to various cells by the optimal partitioning of the available radio frequencies into non-overlapping sets, the optimal grouping of co-user cells, and the best assignment of the former to the latter. The objective is the maximization of traffic handling capacity which, given the multitude of cells, is expressed as the maximization of a bottleneck capacity ratio. The capacity ratio for a cell is defined as the ratio of the number of radio frequencies assigned to the cell over the number of radio frequencies needed to meet blocking probability requirements. The solution to attain an optimal non-regular channel assignment (460) is decomposed into two mathematical programs designated a Master Program (420) and a Subprogram (440). These are solved iteratively with assistance from a channel set augmentation technique (430) implemented between solutions of the Master and Subprogram.

32. 发明专利

CA2234322A1 ANALOG-TO-DIGITAL TRANSITION: SELECTING THE OPTIMAL CELLULAR RADIO MIX 未知
公开(公告)号：CA2234322A1
公开(公告)日：1998-12-03
申请号：CA2234322
申请日：1998-04-08
申请人： AT & T CORP
发明人： BENVENISTE MATHILDE
IPC分类号： H04W16/06 , H04Q7/36
摘要： In a transition phase of a cellular cell from analog-to-digital radio service it must be determined how many of the base station radios in a cell must be changed over from analog to digital, given the proportion of mobile phones with dual-mode capability to analog phones. A dual-mode mobile phone has the capability to interface with both analog and digital radios. In determining the radio mix, it is desirable to maximize the call handling capacity of a cell, or minimi ze the blocking experienced by the mobile subscribers. To address these questions, an analytical model is developed to compute the blocking rate experienced by mobile callers in a cell, given the cell's offered load, the mix of analog and dual-mod e mobiles, and the analog-digital split of the RF channels available to the cell. The model's results enable selection of the channel split that gives the lowest bloc king rate, and to compile charts that show the relationship between the proportion of dual-mode mobiles, the number of digital radios in a cell, and the maximum offer ed load that can be served at a specified blocking rate.

33. 发明专利

HK1003557A1 Apparatus and method for non-regular channel assignment in wireless communication networks 未知
公开(公告)号：HK1003557A1
公开(公告)日：1998-10-30
申请号：HK98102635
申请日：1998-03-27
申请人： AT & T CORP
发明人： BENVENISTE MATHILDE
IPC分类号： H04W16/04 , H04W16/06 , H04Q , H04B
摘要： A channel assignment system assigns channels to various cells by the optimal partitioning of the available radio frequencies into non-overlapping sets, the optimal grouping of co-user cells, and the best assignment of the former to the latter. The objective is the maximization of traffic handling capacity which, given the multitude of cells, is expressed as the maximization of a bottleneck capacity ratio. The capacity ratio for a cell is defined as the ratio of the number of radio frequencies assigned to the cell over the number of radio frequencies needed to meet blocking probability requirements. The solution to attain an optimal non-regular channel assignment (460) is decomposed into two mathematical programs designated a Master Program (420) and a Subprogram (440). These are solved iteratively with assistance from a channel set augmentation technique (430) implemented between solutions of the Master and Subprogram.

34. 发明专利

DE69637119T2 未知
公开(公告)号：DE69637119T2
公开(公告)日：2008-01-31
申请号：DE69637119
申请日：1996-12-23
申请人： AT & T CORP
发明人： BENVENISTE MATHILDE
IPC分类号： H04B15/02 , H04B7/005 , H04B7/26 , H04W16/04 , H04W16/12 , H04W52/14 , H04W52/50 , H04W72/08
摘要： Novel methodologies are provided for managing neighbor channel interference in a cellular wireless communications system as a function of a service-quality factor for a communications channel within such a system. Those methodologies, and their essential function are characterized as: Mixed Power Control -- for overcoming interference problems associated with conventional power control methods; Directed Assignment -- for reducing neighbor-channel conflicts between neighboring cells in non-congestion conditions; and Mixed Power Control with Directed Assignment -- for reducing neighbor-channel interference between neighboring cells.

35. 发明专利

AT364304T 未知
公开(公告)号：AT364304T
公开(公告)日：2007-06-15
申请号：AT96120790
申请日：1996-12-23
申请人： AT & T CORP
发明人： BENVENISTE MATHILDE
IPC分类号： H04B15/02 , H04B7/005 , H04B7/26 , H04W16/04 , H04W16/12 , H04W52/14 , H04W52/50 , H04W72/08
摘要： Novel methodologies are provided for managing neighbor channel interference in a cellular wireless communications system as a function of a service-quality factor for a communications channel within such a system. Those methodologies, and their essential function are characterized as: Mixed Power Control -- for overcoming interference problems associated with conventional power control methods; Directed Assignment -- for reducing neighbor-channel conflicts between neighboring cells in non-congestion conditions; and Mixed Power Control with Directed Assignment -- for reducing neighbor-channel interference between neighboring cells.

36. 发明专利

AT341165T 未知
公开(公告)号：AT341165T
公开(公告)日：2006-10-15
申请号：AT96118787
申请日：1996-11-22
申请人： AT & T CORP
发明人： BENVENISTE MATHILDE
IPC分类号： H04W16/02 , H04W16/12 , H04W16/24 , H04Q7/36 , H04Q7/22
摘要： Novel methodologies are provided for managing neighbor channel interference in a cellular wireless communications system as a function of a service-quality factor for a communications channel within such a system. Those methodologies, and their essential function are characterized as: Even / Odd Cell Designation -- for eliminating adjacent-channel conflicts within a cell; Vertical Channel-Set Construction -- for eliminating adjacent-channel conflicts between abutting sectors in sectorized cells; and Minimum Adjacency Circuit Method -- for reducing the number of adjacent edges between abutting cells or sectors in a regular channel assignment.

37. 发明专利

AU712252B2 Apparatus and method for adaptive dynamic channel assignment in wireless communication networks 未知
公开(公告)号：AU712252B2
公开(公告)日：1999-11-04
申请号：AU4586596
申请日：1996-03-01
申请人： AT & T CORP
发明人： BENVENISTE MATHILDE
IPC分类号： H04W16/04 , H04W16/06 , H04W16/18 , H04Q7/36
摘要： A channel assignment system assigns channels to various cells by the optimal partitioning of the available radio frequencies into non-overlapping sets, the optimal grouping of co-user cells, and the best assignment of the former to the latter. The objective is the maximization of traffic handling capacity which, given the multitude of cells, is expressed as the maximization of a bottleneck capacity ratio. The capacity ratio for a cell is defined as the ratio of the number of radio frequencies assigned to the cell over the number of radio frequencies needed to meet blocking probability requirements. The solution to attain an optimal non-regular channel assignment is decomposed into two mathematical programs designated a Master Program and a Subprogram. These are solved iteratively with assistance from a channel set augmentation technique impelmented between solutions of the Master and Subprogram.

38. 发明专利

DE69320085T2 未知
公开(公告)号：DE69320085T2
公开(公告)日：1999-01-07
申请号：DE69320085
申请日：1993-03-11
申请人： AT & T CORP
发明人： BENVENISTE MATHILDE
IPC分类号： H04W16/32 , H04W36/04 , H04Q7/36 , H04B7/26
摘要： A particular method for enabling the service of mobiles by a microcell (312), in a two tier cellular system, involves identifying a microcell coverage area (312) and attenuating microcell signal strength for a time sufficient to allow a fast moving vehicle (345), desiring service and having entered the microced serving area, to exit the microcell coverage area before the call is set up or handed off forcing the controlling macrocell to handle the call setup or handoff. Hence only the mobile radiotelephones of stationary and relatively slow moving vehicles are served by the microcell. Calls that could be serviced by the microcell are instead serviced by the macrocell because the mobile radiotelephone responds to the strongest signal. This loss in capacity is solved by reducing the offset-coverage overlap. Offset-coverage overlap is reduced by starting the attenuation time (To) in response to a broadcast signal sent by the microcell at some predetermined point (352) before the mobile enters (345) the microcell coverage area (312) and by increasing the attenuation time length (To) by some predetermined increment to prevent service by the microcell to a vehicle exceeding a cutoff speed. For slow moving vehicles there is a shift to a reduced attenuation period within the microcell coverage area and hence proportionately more call setup and handoff requests of slow moving vehicles can be accommodated. Service permissions for call setup with microcells may also be based on certain identification associated with mobile radiotelephones.

39. 发明专利

DE69320085D1 未知
公开(公告)号：DE69320085D1
公开(公告)日：1998-09-10
申请号：DE69320085
申请日：1993-03-11
申请人： AT & T CORP
发明人： BENVENISTE MATHILDE
IPC分类号： H04W16/32 , H04W36/04 , H04Q7/36 , H04B7/26
摘要： A particular method for enabling the service of mobiles by a microcell (312), in a two tier cellular system, involves identifying a microcell coverage area (312) and attenuating microcell signal strength for a time sufficient to allow a fast moving vehicle (345), desiring service and having entered the microced serving area, to exit the microcell coverage area before the call is set up or handed off forcing the controlling macrocell to handle the call setup or handoff. Hence only the mobile radiotelephones of stationary and relatively slow moving vehicles are served by the microcell. Calls that could be serviced by the microcell are instead serviced by the macrocell because the mobile radiotelephone responds to the strongest signal. This loss in capacity is solved by reducing the offset-coverage overlap. Offset-coverage overlap is reduced by starting the attenuation time (To) in response to a broadcast signal sent by the microcell at some predetermined point (352) before the mobile enters (345) the microcell coverage area (312) and by increasing the attenuation time length (To) by some predetermined increment to prevent service by the microcell to a vehicle exceeding a cutoff speed. For slow moving vehicles there is a shift to a reduced attenuation period within the microcell coverage area and hence proportionately more call setup and handoff requests of slow moving vehicles can be accommodated. Service permissions for call setup with microcells may also be based on certain identification associated with mobile radiotelephones.

40. 发明专利

HK1001161A1 SYSTEM AND METHOD FOR MANAGEMENT OF NEIGHBOR-CHANNEL INTERFERENCE WITH CELLULAR REUSE PARTITIONING 未知
公开(公告)号：HK1001161A1
公开(公告)日：1998-05-29
申请号：HK97102693
申请日：1997-12-31
申请人： AT & T CORP
发明人： BENVENISTE MATHILDE
IPC分类号： H04W20090101 , H04W16/02 , H04W16/12
摘要： A novel methodology is provided for managing neighbor channel interference in a cellular wireless communications system as a function of a service-quality factor for a communications channel within such a system. That methodology is characterized as Re-Use Partitioning with Neighbor-Channel Restrictions, and carries out the function of eliminating neighbor-channel interference between neighboring omni-directional cells.

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