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1. 发明授权

US6138025A Method for distributing paging load in a cellular wireless communication system and system within which such method is implemented 失效
标题翻译：在其中实现这种方法的蜂窝无线通信系统和系统中分发寻呼负载的方法
公开(公告)号：US6138025A
公开(公告)日：2000-10-24
申请号：US32419
申请日：1998-02-26
申请人： Hee C. Lee , Wei Yuan , Sairam Subramanian , Sheng-Chou Lin
发明人： Hee C. Lee , Wei Yuan , Sairam Subramanian , Sheng-Chou Lin
IPC分类号： H04W68/00 , H04Q7/20
CPC分类号： H04W68/00
摘要： A method for distributing paging load in a multicell wireless communication system establishes a plurality of location areas, with each location area including at least one cell. A load limit is based upon the greatest number of pages that may be transmitted in a particular cell over a given time period for cells of the multicell wireless communication system is determined. A paging load for the cellular wireless communication system is determined based upon historical loading and/or simulations and projections. A plurality of location areas are determined so that the paging load is distributed among the plurality of location areas such that a partial paging load respective to each cell of the multicell wireless communication system is less than a respective load limit. Boundaries of the location areas are then chosen to substantially minimize registration load within the multicell wireless communication system. In reducing registration loading, the location areas may be created so that some of the cells of the multicell wireless communication system reside in a plurality of location areas. A graph partitioning algorithm, such as a modified KL algorithm may be used to create the location areas and set the boundaries. In such operation, weights are determined for each node (cell) and edge in the graph, such weights based upon respective paging loads, non-paging loads and expected mobility between cells for the respective cell. Once these weights have been assigned, a modified KL graph partition is performed to find the location area boundaries which reduce registration loading. A multicell wireless communication system constructed according to the present invention includes a plurality of location areas having boundaries selected to reduce registration loading.
摘要翻译：在多单元无线通信系统中分配寻呼负载的方法建立多个位置区域，每个位置区域包括至少一个小区。负载限制基于在多个单元无线通信系统的单元确定的给定时间段内可以在特定小区中发送的最大页数。基于历史负载和/或模拟和预测确定蜂窝无线通信系统的寻呼负载。确定多个位置区域，使得寻呼负载分布在多个位置区域中，使得相应于多单元无线通信系统的每个小区的部分寻呼负载小于相应的负载限制。然后选择位置区域的边界以便基本上最小化多单元无线通信系统内的注册负载。在减少注册加载中，可以创建位置区域，使得多单元无线通信系统的一些小区驻留在多个位置区域中。可以使用诸如修改的KL算法的图分割算法来创建位置区域并设置边界。在这种操作中，对于图中的每个节点（小区）和边缘确定权重，这些权重基于相应的寻呼负载，非寻呼负载以及相应小区的小区之间的预期移动性。一旦分配了这些权重，就执行一个修改后的KL图分区来找到减少注册加载的位置区域边界。根据本发明构造的多单元无线通信系统包括具有被选择以减少配准加载的边界的多个位置区域。

2. 发明授权

US06178163B1 Optimal packet routing method and system for low earth orbit satellite communication system 失效
标题翻译：低地球轨道卫星通信系统的最优分组路由方法和系统
公开(公告)号：US06178163B1
公开(公告)日：2001-01-23
申请号：US09210430
申请日：1998-12-11
申请人： Wei Yuan , Sairam Subramanian
发明人： Wei Yuan , Sairam Subramanian
IPC分类号： H04B7212
CPC分类号： H04B7/195 , H04B7/18584
摘要： In a LEO satellite system with the implementation of a virtual network, a method and a system are proposed for arranging an optimal route for data packets to travel. The method and system will diversify the traffic between satellites, and accordingly enhance the efficient use of the entire satellite system. An intermediary satellite is first selected between a source satellite and a destination satellite. Further, an optimal route is found among a plurality of shortest paths between the source satellite and the intermediary satellite, and subsequently another optimal route is found between the intermediary satellite and the destination satellite. Once an optimal route is determined, the route information can be encoded in the header segment of data packets. The data packets will travel from the source satellite, via the intermediary satellite, and eventually to the destination satellite without requiring any satellite to transfer routing tables, and without unnecessarily over burdening the traffic along the way between the source satellite and the destination satellite. By doing so, more communication connections can be made for billable wireless services. Moreover, a randomized selection of an intermediary satellite provides an optimal route, and consequently reduces, if not eliminates, the need for traffic congestion control.
摘要翻译：在实施虚拟网络的LEO卫星系统中，提出了一种方法和系统，用于布置用于数据分组行进的最优路由。该方法和系统将使卫星之间的通信多样化，从而提高整个卫星系统的有效利用。首先在源卫星和目的地卫星之间选择中间卫星。此外，在源卫星和中间卫星之间的多个最短路径中找到最佳路由，并且随后在中间卫星和目的卫星之间找到另一最佳路由。一旦确定了最佳路由，路由信息就可以被编码在数据分组的报头段中。数据分组将通过中间卫星从源卫星，最终到达目的地卫星，而不需要任何卫星传输路由表，并且不必过分地加重源卫星与目的卫星之间的通信量。通过这样做，可以为可收费的无线服务提供更多的通信连接。此外，中间卫星的随机选择提供了最佳路由，从而减少了如果不消除对于拥塞控制的需要。

3. 发明授权

US6055433A Data processing system and method for balancing a load in a communications network 失效
标题翻译：用于平衡通信网络中的负载的数据处理系统和方法
公开(公告)号：US6055433A
公开(公告)日：2000-04-25
申请号：US832517
申请日：1997-04-03
申请人： Wei Yuan , Surnjani Djoko , Sairam Subramanian , Seshu Madhavapeddy , Payam Maveddat
发明人： Wei Yuan , Surnjani Djoko , Sairam Subramanian , Seshu Madhavapeddy , Payam Maveddat
IPC分类号： H04W24/02 , H04Q7/22
CPC分类号： H04W24/02
摘要： A data processing system implements a load balancing methodology which recognizes the effects that multiple, mobile subscribers have within a wireless communications network. During execution of this load balancing methodology, a rehoming operation is executed at a telephone central office to move some subscribers in a network to a new home mobile switching center with a minimum number of rehoming steps. To perform this rehoming operation, a mobile switching center in a network which has a highest load is selected first. Mobile switching centers which have a load lower than a network average load are considered to be candidates for a rehome destination. All subscriber groups homed to the highest loaded mobile switching center are evaluated to determine whether or not a rehoming operation using this subscriber group would provide a highest benefit and give a lowest standard deviation of loads among mobile switching centers after the rehome operation is selected. This operation is iterative and searches for the best directory number to be homed in each candidate mobile switching center. A resulting balanced load of network resources will serve to increase the effectiveness and longevity of a current wireless communications network before additional equipment is required.
摘要翻译：数据处理系统实现负载均衡方法，其识别出多个移动用户在无线通信网络内具有的影响。在执行这种负载均衡方法时，在电话中心局执行重新上电操作，以将网络中的一些用户移动到具有最小数目的重新定位步骤的新的家庭移动交换中心。为了执行该重新寻线操作，首先选择具有最高负载的网络中的移动交换中心。具有低于网络平均负载的负载的移动交换中心被认为是候选目的地的候选者。评估归属于最高负载移动交换中心的所有用户组，以确定在选择重新操作之后，使用该用户组的重新加扰操作是否将提供最大的收益并且在移动交换中心之间给出最低的负载标准偏差。这个操作是迭代的，并搜索每个候选移动交换中心要归属的最佳目录号码。由此产生的平衡负载的网络资源将有助于在需要额外的设备之前提高当前无线通信网络的有效性和寿命。

4. 发明授权

US06094580A Method for optimizing cell-site placement 失效
标题翻译：优化细胞位置放置的方法
公开(公告)号：US06094580A
公开(公告)日：2000-07-25
申请号：US951685
申请日：1997-10-16
申请人： Chang Yu , Sairam Subramanian , Andrew Sendonaris , Sheng-Chou Lin , Mohamed Landolsi , Nikhil Jain , Seshu Madhavapeddy , Stone Tseng , Venugopal Veeravalli
发明人： Chang Yu , Sairam Subramanian , Andrew Sendonaris , Sheng-Chou Lin , Mohamed Landolsi , Nikhil Jain , Seshu Madhavapeddy , Stone Tseng , Venugopal Veeravalli
IPC分类号： H04W16/18 , H04B17/00
CPC分类号： H04W16/18
摘要： Provided herein is a computer-implemented method for generating an optimized cellular-network cell-site plan for an area. A plurality of cellular-traffic demand nodes distributed across the area is provided. Each cellular-traffic demand node of the plurality of cellular-traffic demand nodes has an associated weighting characteristics set. The plurality of nodes are consolidated into a plurality of centroids. Each centroid represents a number of nodes that come within a traffic threshold. A potential cell site is positioned on each of the centroids. Each potential cell site has an associated base-transmitter-station parameter characteristics set. The demand node coverage of each potential cell site is determined with respect to a signal strength of the potential cell site. From the plurality of potential cell sites a minimized cell-site subset is selected while maintaining sufficient cellular service coverage of the plurality of demand nodes.
摘要翻译：本文提供了一种用于为区域生成优化的蜂窝网络小区站点计划的计算机实现的方法。提供分布在该区域上的多个蜂窝业务需求节点。多个蜂窝业务需求节点中的每个蜂窝业务需求节点具有相关联的权重特征集合。多个节点被合并为多个质心。每个质心代表流量阈值内的多个节点。潜在的细胞位点位于每个质心上。每个潜在的小区站点都具有一个相关的基站 - 发射台参数特征集。相对于潜在细胞位点的信号强度确定每个潜在细胞位点的需求节点覆盖。从多个潜在的小区站点中选择最小化的小区站点子集，同时维持多个需求节点的足够的蜂窝业务覆盖。

5. 发明授权

US6085335A Self engineering system for use with a communication system and method of operation therefore 失效
标题翻译：自动工程系统用于通信系统和操作方法
公开(公告)号：US6085335A
公开(公告)日：2000-07-04
申请号：US1282
申请日：1997-12-31
申请人： Surnjani Djoko , Hua Jiang , Hee C. Lee , Sairam Subramanian , Seshagiri Madhavapeddy , Kalyan Basu
发明人： Surnjani Djoko , Hua Jiang , Hee C. Lee , Sairam Subramanian , Seshagiri Madhavapeddy , Kalyan Basu
IPC分类号： H04L12/24 , H04Q3/00 , G06F11/00
CPC分类号： H04L41/16 , H04Q3/0062
摘要： A self engineering system includes a data acquisition module, a self engineering engine, and a control module. The data acquisition module couples to the communication system and receives current operating data of the communication system. The self engineering engine receives the current operating data and determines new operating parameters of the communication system based upon the current operating data and current operating parameters. The control module implements the new operating parameters within the communication system. The self engineering system may include an expert system that receives the current operating data and, based upon the current operating data and the current operating parameters of the communication system, produces the new operating parameters. The expert system includes a fact library, a knowledge base and an inference engine. The fact library includes configuration data, historical operating data, the current operating parameters and proposed operating parameters. The knowledge base consists of rules intended to alter the fact library based upon contents of the fact library and the current operating data. Finally, the inference engine executes the rules and alters the fact library. The knowledge base and the inference engine then work together to produce the new operating parameters based upon contents of the fact library. The expert system may also include a system simulator that simulates operation of the communication system to verify proposed operating parameters prior to their implementation. The self engineering system also determines configuration errors, possible hardware faults and even improper hardware installation of the communication system. Thus, the self engineering system is useful in cross-checking installation as well as the functionality of the communication system as installed.
摘要翻译：自我工程系统包括数据采集模块，自动工程引擎和控制模块。数据采集模块耦合到通信系统并接收通信系统的当前操作数据。自动工程引擎基于当前的操作数据和当前的操作参数接收当前的操作数据并确定通信系统的新的操作参数。控制模块在通信系统内实现新的操作参数。自我工程系统可以包括接收当前操作数据的专家系统，并且基于当前操作数据和通信系统的当前操作参数，产生新的操作参数。专家系统包括事实库，知识库和推理引擎。事实库包括配置数据，历史操作数据，当前操作参数和提出的操作参数。知识库包括旨在根据事实库的内容和当前操作数据来更改事实库的规则。最后，推理引擎执行规则并改变事实库。知识库和推理引擎随后一起工作，根据事实库的内容生成新的操作参数。专家系统还可以包括系统模拟器，其模拟通信系统的操作以在其实现之前验证所提出的操作参数。自我工程系统还可以确定配置错误，可能的硬件故障甚至通信系统的硬件安装不当。因此，自动工程系统在交叉检查安装以及安装的通信系统的功能方面很有用。

6. 发明授权

US06539221B1 Automated wireless network design 有权
标题翻译：自动化无线网络设计
公开(公告)号：US06539221B1
公开(公告)日：2003-03-25
申请号：US09473746
申请日：1999-12-28
申请人： Mini Vasudevan , Carlos Garcia , Chang Yu , Hakan Ernam , Will Egner , Sairam Subramanian , Kenni Rasmussen
发明人： Mini Vasudevan , Carlos Garcia , Chang Yu , Hakan Ernam , Will Egner , Sairam Subramanian , Kenni Rasmussen
IPC分类号： H04B1700
CPC分类号： H04W16/18
摘要： The present invention is a system for optimizing an existing wireless network and additions to an existing network. The system determines a value representing estimation of traffic in discrete bins within a geographic area. The traffic estimation includes a distribution of handover and new cell traffic based at least in part on the presence of a road in any bin or the proximity of a bin to a handover boundary. The cell coverage and carrier allocations of existing cells are adjusted in view of the traffic estimation.
摘要翻译：本发明是一种用于优化现有无线网络和对现有网络的添加的系统。系统确定表示地理区域内离散箱中的业务量的估计值。交通估计包括至少部分地基于在任何仓中的道路的存在或者一个仓的接近到切换边界的切换和新的小区业务的分配。考虑到流量估计，调整现有小区的小区覆盖和载波分配。

7. 发明授权

US6141552A Estimation of mobility for network planning based on highway maps and traffic data 失效
标题翻译：基于公路图和交通数据估计网络规划的移动性
公开(公告)号：US6141552A
公开(公告)日：2000-10-31
申请号：US971441
申请日：1997-11-17
申请人： Andrew Sendonaris , Hongyi Chen , Nikhil Jain , Seshagri Madhavapeddy , Sairam Subramanian
发明人： Andrew Sendonaris , Hongyi Chen , Nikhil Jain , Seshagri Madhavapeddy , Sairam Subramanian
IPC分类号： H04W16/18 , H04Q7/00
CPC分类号： H04W16/18
摘要： The mobility of mobile subscribers within a wireless digital communications system is estimated based on highway maps and traffic data. Cells within the network are modelled as nodes connected by edges where neighboring cells are connected by roads. Each edge has two edge weight components representing traffic flow from one cell to the other and vice versa. The edge weight components are calculated from terrain factors based on the size or capacity of the roads connecting the two cells and the total traffic within the subject cell, which information may be obtained from commercial geographic databases and/or government agencies. The resulting edge weight represents an expected number of handoffs between the two cells. The problem of partitioning cells among available switches within the network is thus reduced to the purely mathematical problem of minimizing the total edge weights of edges intersected by the partition boundaries. Existing mathematical optimization techniques for optimizing node-edge systems may therefore be applied to reduce the total number of expected inter-switch handoffs as mobile subscribers pass from cell to cell within the network.
摘要翻译：基于高速公路地图和交通数据估计无线数字通信系统内移动用户的移动性。网络内的小区被建模为通过边缘连接的节点，其中相邻小区通过道路连接。每个边缘具有两个边缘权重分量，表示从一个小区到另一个小区的业务流量，反之亦然。基于连接两个小区的道路的大小或容量以及主体小区内的总流量，从地形因子计算边缘权重分量，该信息可以从商业地理数据库和/或政府机构获得。所得到的边缘权重表示两个单元之间的预期切换次数。因此，将网络内的可用交换机之间的小区划分成一个问题，从而减少了将分区边界相交的边缘的总边缘权重最小化的纯数学问题。因此，用于优化节点边缘系统的现有数学优化技术可以被应用于当移动用户从网络中的小区传送到小区时，减少预期的交换机间切换的总数。

8. 发明授权

US6047186A Method and system for solving cellular communications frequency planning problem 失效
标题翻译：解决蜂窝通信频率规划问题的方法和系统
公开(公告)号：US6047186A
公开(公告)日：2000-04-04
申请号：US944376
申请日：1997-10-06
申请人： Chang Yu , Xu Han , Seshagiri Rao Madhavapeddy , Sairam Subramanian
发明人： Chang Yu , Xu Han , Seshagiri Rao Madhavapeddy , Sairam Subramanian
IPC分类号： H04W16/10 , H04Q7/36
CPC分类号： H04W16/10
摘要： The foregoing objects are achieved as is now described. Provided are a method and system for utilization with wireless communications systems having a cellular architecture covering a geographic area. The method and system accomplish their objects via the following. The geographic area is defined. One or more pairs of the sectors within the defined geographic area wherein a weak connection zone exists are determined. The geographic area is decomposed into two or more sub-areas wherein each sub-area is isolated from other sub-areas by the determined one or more pairs of sectors having a weak connection zone. A first of the sub-areas is selected. Frequency groups are assigned to each sector within the first selected sub-area such that signal to noise ratio is optimized. Thereafter, a second of the sub-areas is selected. One or more sectors within the second selected one of the sub-areas which are linked to sectors within the first selected sub-area are selected. Frequency groups are assigned to the selected sectors within the selected second of the sub-areas such that signal to noise ratio in the selected sector within the selected second of the sub-areas is optimized. Thereafter, frequency groups are assigned to every other sector within the selected second of the sub-areas such that signal to noise ratio is optimized across the second selected sub-area and such that signal to noise ratio over the defined geographic area is optimized.
摘要翻译：如上所述实现上述目的。提供了一种用于具有覆盖地理区域的蜂窝体系结构的无线通信系统的方法和系统。该方法和系统通过以下方式完成其对象。定义了地理区域。确定存在弱连接区域的所定义的地理区域内的一个或多个扇区对。地理区域被分解为两个或更多个子区域，其中每个子区域与所确定的一个或多个具有弱连接区域的扇区对应，与其他子区域隔离。选择第一个子区域。将频率组分配给第一选择子区域内的每个扇区，使得信噪比得以优化。此后，选择第二子区域。选择链接到第一选择子区域内的扇区的第二选择的一个子区域内的一个或多个扇区。将频率组分配给所选择的第二子区域内的所选择的扇区，使得所选择的第二子区域内的所选扇区中的信噪比得以优化。此后，将频率组分配给所选择的第二子区域内的每隔一个扇区，使得跨越第二选择的子区域优化信噪比并使得优化所定义的地理区域上的信噪比。

9. 发明授权

US5907810A Method for reducing paging load in a cellular communication system 失效
标题翻译：一种减少蜂窝通信系统中寻呼负载的方法
公开(公告)号：US5907810A
公开(公告)日：1999-05-25
申请号：US743689
申请日：1996-11-06
申请人： Sairam Subramanian , Seshu R. Madhavapeddy , Alexander J. Montoya , Hee C. Lee , Steven J. Currin , Falguni Sarkar
发明人： Sairam Subramanian , Seshu R. Madhavapeddy , Alexander J. Montoya , Hee C. Lee , Steven J. Currin , Falguni Sarkar
IPC分类号： H04W68/00 , H04Q7/06
CPC分类号： H04W68/00
摘要： A method for reducing the paging load in a cellular communication system is described. The cell C with the largest paging load L is first identified. Since this cell is usually included in more than one paging zone, the paging zones including cell C are identified. Thereafter, cell C is removed tentatively from each identified zone and a ratio R calculated which represents the decrease in loading on cell C due to being removed from zone z divided by the maximum increase in loading on any other cell in the network. The zone for which the ratio R is the largest is the best candidate for removing cell C therefrom. After doing so tentatively, the cell C' with the largest paging load L' thereon is identified. If the loading L is greater than L', cell C is removed permanently from the zone having the highest ratio R therefor and the process is repeated until L' is greater than L at which point the process is stopped without removing cell C from the zone with the highest ratio R.
摘要翻译：描述了一种用于减少蜂窝通信系统中的寻呼负载的方法。首先识别具有最大寻呼负载L的小区C。由于该小区通常被包括在多于一个寻呼区域中，因此识别包括小区C的寻呼区域。此后，从每个识别的区域暂时移除小区C，并且计算表示由于从区域z移除的单元C上的负载减小除以网络中任何其他小区上的最大负载增加的比率R. 比率R最大的区域是从中除去单元格C的最佳候选物。在这样做之后，识别其上具有最大寻呼负载L'的小区C'。如果负载L大于L'，则从具有最高比率R的区域永久地移除电池C，并且重复该过程直到L'大于L，在该点停止该过程而不从该区域移除电池C 最高比率R.

10. 发明授权

US5887156A Evolution planning in a wireless network 失效
标题翻译：无线网络中的演进规划
公开(公告)号：US5887156A
公开(公告)日：1999-03-23
申请号：US723709
申请日：1996-09-30
申请人： Sairam Subramanian , Seshagiri Madhavapeddy , Alexander J. Montoya
发明人： Sairam Subramanian , Seshagiri Madhavapeddy , Alexander J. Montoya
IPC分类号： H04W16/18 , G06F9/455 , H04Q7/36
CPC分类号： H04W16/18 , Y10S370/913
摘要： Various operational measurements of a network element are determined in real time. These measurements are used to determine the call carrying capacity of the elements and the reaction of the network element to various call loads. Models of the network elements are generated from the operational measurements. Using an element's model, the network's reaction to various changes in a particular element can be determined without complex and expensive engineering work.
摘要翻译：实时确定网元的各种运行测量。这些测量用于确定元件的呼叫承载能力和网络元件对各种呼叫负载的反应。网络元素的模型是从操作测量中产生的。使用元素的模型，网络对特定元素中各种变化的反应可以在没有复杂和昂贵的工程工作的情况下被确定。

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