公开(公告)号：US06272315B1

公开(公告)日：2001-08-07

申请号：US09061420

申请日：1998-04-16

申请人： Jue Chang ,  Wing F. Lo ,  Won S. Kim

发明人： Jue Chang ,  Wing F. Lo ,  Won S. Kim

IPC分类号： H04B7185

CPC分类号： H04W36/12 ,  H04B7/18545 ,  H04B7/18563 ,  H04W88/06

摘要： Methods for switching a mobile between operation in an mobile satellite system mode and a terrestrial wireless mode. When operating in the terrestrial wireless mode, the mobile terminal will initiate an attempt to switch into the MSS mode when it nears the boundary of the coverage area for a terrestrial wireless system to which it is registered. Conversely, a mobile terminal operating in the MSS mode will regularly attempt to switch into the terrestrial wireless mode. For both, a switch between modes is contingent on the mobile terminal identifying a suitable system for registration therewith upon completing the switch between modes. The criteria for identifying a suitable system for selection purposes include the following: (1) the selected system is available, i.e., the mobile terminal is physically located within a coverage area for the selected system; (2) the mobile terminal is compatible with the selected system; and (3) the selected system is willing to accept the mobile terminal. If multiple systems meet these criteria, the mobile terminal will utilize a stored list of preferred systems to select therefrom. When switching into the terrestrial wireless mode, the MSS system provides the mobile terminal with switch-over information for the underlying terrestrial wireless systems and, when switching into the MSS mode, the terrestrial wireless system provides the mobile terminal with switch-over information for the overlying MSS systems.

摘要翻译： 用于在移动卫星系统模式的操作与地面无线模式之间切换移动站的方法。 当在地面无线模式下操作时，当移动终端接近其登记的地面无线系统的覆盖区域的边界时，移动终端将发起切换到MSS模式的尝试。 相反，以MSS模式工作的移动终端将定期地尝试切换到地面无线模式。 对于两者，模式之间的切换取决于移动终端在完成模式之间的切换时识别用于登记的适当系统。 用于识别用于选择目的的合适系统的标准包括：（1）所选择的系统是可用的，即移动终端物理上位于所选系统的覆盖区域内; （2）移动终端与所选系统兼容; （3）所选系统愿意接受移动终端。 如果多个系统满足这些标准，则移动终端将利用存储的优选系统列表来从中选择。 当切换到地面无线模式时，MSS系统向移动终端提供用于底层地面无线系统的切换信息，并且当切换到MSS模式时，地面无线系统向移动终端提供切换信息 覆盖MSS系统。

公开(公告)号：US08259746B2

公开(公告)日：2012-09-04

申请号：US11977592

申请日：2007-10-25

申请人： Wing F. Lo ,  François F. Blouin

发明人： Wing F. Lo ,  François F. Blouin

IPC分类号： H04L12/413

CPC分类号： H04L12/413 ,  H04L47/13 ,  H04L47/2416 ,  H04L47/2433

摘要： A communications system includes a network that is coupled to a number of terminals, at least some of which are capable of audio or other forms of real-time interactive data communications over the network. Each of the terminals includes a network adapter that is capable of detecting a collision with another terminal on the network. If a collision is detected, transmission of a data frame is aborted, and a backoff time delay is selected. The backoff time delay is selected from a group of delay periods that vary at a rate different than exponentially with a number of collisions. The group of one or more delay periods can contain delay periods that increase linearly with the number of collisions, delay periods that increase according to some power of n, where n is the number of collisions, or a delay period that is selected at random based on a predetermined mean backoff delay. Alternatively, the selected backoff time delay is selected from a group of delay periods that increases exponentially with the number of collisions, but with a maximum value set that is less than the maximum set according to conventional backoff algorithms.

摘要翻译： 通信系统包括耦合到多个终端的网络，其中至少一些能够通过网络进行音频​​或其他形式的实时交互式数据通信。 每个终端包括能够检测与网络上的另一终端的冲突的网络适配器。 如果检测到冲突，则中止数据帧的发送，并且选择退避时间延迟。 从一组延迟周期中选择后退时间延迟，该组的延迟周期以与多次碰撞的指数式不同的速率变化。 一个或多个延迟周期的组可以包含随着冲突次数线性增加的延迟周期，根据n的一些功率增加的延迟周期，其中n是冲突的数量，或者以随机为基础选择的延迟周期 在预定的平均回退延迟上。 或者，所选择的退避时间延迟是从一组延迟周期中选择的，这些延迟周期随着冲突次数而呈指数增长，但是根据传统的退避算法具有小于最大值的最大值集合。

公开(公告)号：US6122483A

公开(公告)日：2000-09-19

申请号：US342168

申请日：1999-06-28

申请人： Wing F. Lo ,  Stewart O'Dell ,  Payam Maveddat

发明人： Wing F. Lo ,  Stewart O'Dell ,  Payam Maveddat

IPC分类号： H04B7/185

CPC分类号： H04B7/18523

摘要： A satellite communication system provides multicast messaging services to subscriber units. Upon receipt of a multicast communication page from a satellite communication system network, a subscriber unit waits for a random delay period and then responds with an acknowledge signal. Based upon the time of receipt of the acknowledge signal, e.g., within one of a plurality of time periods, the satellite communication system network assigns the subscriber unit to one of a plurality of traffic channels. The satellite communication system infrastructure then sends a multicast communication message to the subscriber unit on the assigned traffic channel. The subscriber unit then waits for a random delay period and then responds with an acknowledge signal. The satellite communication system network then receives the acknowledge signal. Each of a plurality of subscriber units introduces a random delay before transmitting an acknowledge signal so that the satellite communication system network may determine which of the subscriber units received the multicast communication system message.

摘要翻译： 卫星通信系统向用户单元提供多播消息传送服务。 在从卫星通信系统网络接收到多播通信页面时，用户单元等待随机延迟周期，然后用确认信号进行响应。 基于接收确认信号的时间，例如在多个时间段之一内，卫星通信系统网络将用户单元分配给多个业务信道之一。 然后，卫星通信系统基础设施在分配的业务信道上向用户单元发送组播通信消息。 用户单元然后等待随机延迟周期，然后用确认信号进行响应。 卫星通信系统网络接收确认信号。 多个用户单元中的每一个在发送确认信号之前引入随机延迟，使得卫星通信系统网络可以确定哪个用户单元接收到多播通信系统消息。

公开(公告)号：US08037163B1

公开(公告)日：2011-10-11

申请号：US11971098

申请日：2008-01-08

申请人： Wing F. Lo ,  Richard C. McNamara ,  Bahareh Momken ,  Bruce Robinson

发明人： Wing F. Lo ,  Richard C. McNamara ,  Bahareh Momken ,  Bruce Robinson

IPC分类号： G06F15/16

CPC分类号： H04L43/0805 ,  H04L41/145 ,  H04L45/22 ,  H04L45/28

摘要： The present invention provides methods, devices, and systems for determining the availability of at least a part of a communications network in the context of alternate routing. Moreover, the present invention is adapted to consider network flow variations based on device outages all while accounting for the actual probability associated with various re-routing scenarios.

摘要翻译： 本发明提供了用于在替代路由的上下文中确定通信网络的至少一部分的可用性的方法，设备和系统。 此外，本发明适于考虑基于设备中断的网络流量变化，同时考虑与各种重新路由情况相关联的实际概率。

公开(公告)号：US5293642A

公开(公告)日：1994-03-08

申请号：US630010

申请日：1990-12-19

申请人： Wing F. Lo

发明人： Wing F. Lo

IPC分类号： G01S5/02 ,  G01S19/09 ,  G01S19/46 ,  H04W64/00 ,  H04Q7/00

CPC分类号： H04W64/00 ,  G01S5/02

摘要： A method of providing an estimation of a mobile station's location in a cellular communication system having a plurality of base stations and mobile stations is disclosed. The mobile station's location is provided by measuring radio propagation parameters between the mobile station and each base station within propagation range of the mobile station. Then, a location probability density function (pdf) is found based on the measured radio propagation parameters. A joint probability density function (pdf) is then constructed by combining each individual function which is obtained. The location of the mobile station is then estimated from the resulting joint probability density function (pdf).

摘要翻译： 公开了一种在具有多个基站和移动台的蜂窝通信系统中提供对移动台位置的估计的方法。 移动站的位置是通过测量移动站与移动站的传播范围内的每个基站之间的无线电传播参数来提供的。 然后，基于测量的无线电传播参数找到位置概率密度函数（pdf）。 然后通过组合获得的每个单独函数来构建联合概率密度函数（pdf）。 然后根据所得到的联合概率密度函数（pdf）来估计移动站的位置。

公开(公告)号：US07313105B1

公开(公告)日：2007-12-25

申请号：US09670172

申请日：2000-09-26

申请人： Wing F. Lo ,  Francois F. Blouin

发明人： Wing F. Lo ,  Francois F. Blouin

IPC分类号： H04B7/216 ,  H04J15/00 ,  G06F15/16

CPC分类号： H04L12/413 ,  H04L47/13 ,  H04L47/2416 ,  H04L47/2433

摘要： A communications system includes a network that is coupled to a number of terminals, at least some of which are capable of audio or other forms of real-time interactive data communications over the network. Each of the terminals includes a network adapter that is capable of detecting a collision with another terminal on the network. If a collision is detected, transmission of a data frame is aborted, and a backoff time delay is selected. The backoff time delay is selected from a group of delay periods that vary at a rate different than exponentially with a number of collisions. The group of one or more delay periods can contain delay periods that increase linearly with the number of collisions, delay periods that increase according to some power of n, where n is the number of collisions, or a delay period that is selected at random based on a predetermined mean backoff delay. Alternatively, the selected backoff time delay is selected from a group of delay periods that increases exponentially with the number of collisions, but with a maximum value set that is less than the maximum set according to conventional backoff algorithms.

摘要翻译： 通信系统包括耦合到多个终端的网络，其中至少一些能够通过网络进行音频​​或其他形式的实时交互式数据通信。 每个终端包括能够检测与网络上的另一终端的冲突的网络适配器。 如果检测到冲突，则中止数据帧的发送，并且选择退避时间延迟。 从一组延迟周期中选择后退时间延迟，该组的延迟周期以与多次碰撞的指数式不同的速率变化。 一个或多个延迟周期的组可以包含随着冲突次数线性增加的延迟周期，根据n的一些功率增加的延迟周期，其中n是冲突的数量，或者以随机为基础选择的延迟周期 在预定的平均回退延迟上。 或者，所选择的退避时间延迟是从一组延迟周期中选择的，这些延迟周期随着冲突次数而呈指数增长，但是根据传统的退避算法具有小于最大值的最大值集合。

公开(公告)号：US07024475B1

公开(公告)日：2006-04-04

申请号：US09557451

申请日：2000-04-24

申请人： Alireza Abaye ,  Wing F. Lo ,  Ralph R. Carsten ,  Bruce Robertson ,  Daniel Briere

发明人： Alireza Abaye ,  Wing F. Lo ,  Ralph R. Carsten ,  Bruce Robertson ,  Daniel Briere

IPC分类号： G06F15/173

CPC分类号： H04L41/145 ,  H04L41/22 ,  H04L65/80

摘要： A modeling tool that is executable in a system includes a modeling application that is capable of deriving a predicted quality of communications in a represented communications system. A user may create a representation of a target communication system by using icons representing different network components to build the representation in a user interface. Each of the network components is associated with one or more performance parameters, such as packet delay, packet loss, and jitter for packet-based network components. An overall performance parameter, such as an overall packet delay, overall packet loss, and overall jitter may be derived based on the performance parameters for each of the network components. From the overall performance parameters, the expected or predicted performance of the target communications system may be determined by using an E-model in one arrangement.

摘要翻译： 可在系统中执行的建模工具包括能够导出所表示的通信系统中的预测通信质量的建模应用。 用户可以通过使用表示不同网络组件的图标在用户界面中构建表示来创建目标通信系统的表示。 每个网络组件与一个或多个性能参数相关联，例如分组延迟，分组丢失和基于分组的网络组件的抖动。 可以基于每个网络组件的性能参数来导出总体性能参数，例如总体分组延迟，总体分组丢失和总体抖动。 根据总体性能参数，目标通信系统的预期或预测的性能可以通过在一种布置中使用E模型来确定。

公开(公告)号：US08045575B2

公开(公告)日：2011-10-25

申请号：US11977488

申请日：2007-10-25

申请人： Wing F. Lo ,  François F. Blouin

发明人： Wing F. Lo ,  François F. Blouin

IPC分类号： H04L12/413

CPC分类号： H04L12/413 ,  H04L47/13 ,  H04L47/2416 ,  H04L47/2433

摘要： A communications system includes a network that is coupled to a number of terminals, at least some of which are capable of audio or other forms of real-time interactive data communications over the network. Each of the terminals includes a network adapter that is capable of detecting a collision with another terminal on the network. If a collision is detected, transmission of a data frame is aborted, and a backoff time delay is selected. The backoff time delay is selected from a group of delay periods that vary at a rate different than exponentially with a number of collisions. The group of one or more delay periods can contain delay periods that increase linearly with the number of collisions, delay periods that increase according to some power of n, where n is the number of collisions, or a delay period that is selected at random based on a predetermined mean backoff delay. Alternatively, the selected backoff time delay is selected from a group of delay periods that increases exponentially with the number of collisions, but with a maximum value set that is less than the maximum set according to conventional backoff algorithms.

摘要翻译： 通信系统包括耦合到多个终端的网络，其中至少一些能够通过网络进行音频​​或其他形式的实时交互式数据通信。 每个终端包括能够检测与网络上的另一终端的冲突的网络适配器。 如果检测到冲突，则中止数据帧的发送，并且选择退避时间延迟。 从一组延迟周期中选择后退时间延迟，该组的延迟周期以与多次碰撞的指数式不同的速率变化。 一个或多个延迟周期的组可以包含随着冲突次数线性增加的延迟周期，根据n的一些功率增加的延迟周期，其中n是冲突的数量，或者以随机为基础选择的延迟周期 在预定的平均回退延迟上。 或者，所选择的退避时间延迟是从一组延迟周期中选择的，这些延迟周期随着冲突次数而呈指数增长，但是根据传统的退避算法具有小于最大值的最大值集合。

公开(公告)号：US06487183B1

公开(公告)日：2002-11-26

申请号：US09228607

申请日：2001-12-21

申请人： Wing F. Lo ,  Jeff L. Watson

发明人： Wing F. Lo ,  Jeff L. Watson

IPC分类号： H04B7212

CPC分类号： H04B7/18582

摘要： A method for implementing an activity based resource assignment medium access control (MAC) protocol to allocate resources to subscribers in an interactive, multimedia, broadband satellite communications system. A plurality of channels is provided with at least one of said plurality of channels being assigned to each of a plurality of terminals. Utilization of the channel resources by the plurality of terminals is monitored and an evaluation is conducted of system needs based on the levels of activity and utilization of channel resources by the terminals. Requests for system resources by the terminals are communicated to a resource controller which calculates the system needs. The resource controller is utilized to adjust the channel resources based on the levels of activity and utilization of resources by the terminals. The adjustment provides active terminals as much resources as required during duration of their activity, subject to resource availability.

摘要翻译： 一种用于实现基于活动的资源分配介质访问控制（MAC）协议以在交互式多媒体宽带卫星通信系统中向用户分配资源的方法。 多个信道被提供有多个信道中的至少一个被分配给多个终端中的每一个。 对多个终端的信道资源的利用进行监视，基于终端的信道资源的活动性和利用率来进行系统需求的评估。 通过终端向系统资源的请求传送给计算系统需求的资源控制器。 资源控制器用于根据终端的资源的活动级别和利用率来调整信道资源。 根据资源可用性，调整在活动期间为活动终端提供所需的资源。

公开(公告)号：US06798786B1

公开(公告)日：2004-09-28

申请号：US09370984

申请日：1999-08-20

申请人： Wing F. Lo ,  Xuewen Li ,  Alireza Abaye

发明人： Wing F. Lo ,  Xuewen Li ,  Alireza Abaye

IPC分类号： H04Q700

CPC分类号： H04L65/4007 ,  H04L12/6418 ,  H04L29/06027 ,  H04L65/80 ,  H04L2012/6481 ,  H04M2207/203 ,  H04Q2213/13034 ,  H04Q2213/13196 ,  H04Q2213/13348 ,  H04Q2213/13349 ,  H04Q2213/13389

摘要： A method and system of managing calls over a data network includes determining an available bandwidth of the data network. After a call request is received for establishing a call between at least two network terminals, one or more of a plurality of resource elements are selected in response to the call request based on the bandwidth of the data network. The resource elements, which can include codecs (coders/decoders), packet sizes (for carrying audio data), and others, are used in the requested call between the at least two network terminals. Further, a plurality of communities may be defined each including one or more terminals. One or more usage threshold values may be assigned to a link or links between communities, and a call request is processed based on the one or more usage threshold values. The processing includes at least one of determining whether to admit the call request and selecting resource elements to be used during a call between terminals over the link.

摘要翻译： 通过数据网络管理呼叫的方法和系统包括确定数据网络的可用带宽。 在接收到用于在至少两个网络终端之间建立呼叫的呼叫请求之后，响应于基于数据网络的带宽的呼叫请求来选择多个资源元素中的一个或多个。 在所述至少两个网络终端之间的请求呼叫中使用可包括编解码器（编码器/解码器）的数据包大小（用于承载音频数据）的资源元素等。 此外，可以定义每个包括一个或多个终端的多个社区。 可以将一个或多个使用阈值分配给社区之间的链路或链路，并且基于一个或多个使用阈值来处理呼叫请求。 该处理包括以下中的至少一个：确定是否允许呼叫请求以及在通过链路的终端之间的呼叫期间选择要使用的资源元素。