公开(公告)号：US06700895B1

公开(公告)日：2004-03-02

申请号：US09526649

申请日：2000-03-15

申请人： James M. Kroll

发明人： James M. Kroll

IPC分类号： H04L1224

CPC分类号： H04L47/10 ,  H04L47/22 ,  H04L47/2416 ,  H04L47/283 ,  H04L47/29 ,  H04L47/30 ,  H04L49/90 ,  H04L2012/6489

摘要： A method and system for selecting an optimal size of a jitter buffer in a real time communications system includes calculating a frame loss rate from packet arrival statistics. The packet arrival statistics include determining an average queue time a frame spends in a jitter buffer and determining the difference between an expected arrival time and actual arrival time of a sample of data packets into a receiver. The frame loss rate is calculated by considering the frames that arrive late, frames that are lost in the network and frames that overflow due to an arriving burst of frames.

摘要翻译： 用于在实时通信系统中选择抖动缓冲器的最佳大小的方法和系统包括从分组到达统计计算帧丢失率。 分组到达统计包括确定帧在抖动缓冲器中花费的平均队列时间，并且确定数据分组的样本的预期到达时间与实际到达时间之间的差异到接收机中。 通过考虑到达迟到的帧，在网络中丢失的帧和由于到达的帧突发而溢出的帧来计算帧丢失率。

公开(公告)号：US06333918B1

公开(公告)日：2001-12-25

申请号：US09091636

申请日：1999-04-08

申请人： Heinrich Hummel

发明人： Heinrich Hummel

IPC分类号： H04L1224

CPC分类号： H04L45/04 ,  H04L45/34

摘要： Switching nodes of a communications network are assigned subnetworks and are interconnected to one another in any desired fashion. Stored in a source switching node is at least topology information on the node's own subnetwork and on the interconnection of the subnetworks. In addition, the source switching node is provided with the communications conditions which are required for the communications link to be set up. By reference to the topology information, a subset of switching nodes and connecting lines which satisfies the communications conditions is selected and a route to the destination switching node is determined. Included in this process is a route which, in the direction from the source switching node to the destination switching node, leaves at least one subnetwork once and returns to the subnetwork again in the further course of the route. The routing information is then formed from the route which has been determined.

摘要翻译： 通信网络的交换节点被分配子网并且以任何期望的方式彼此互连。 存储在源交换节点中的至少至少是节点自身子网上的拓扑信息以及子网的互连。 另外，为源交换节点提供通信链路所需的通信条件。 通过参照拓扑信息，选择满足通信条件的交换节点和连接线路的子集，并确定到目的交换节点的路由。 在该过程中包括沿着从源交换节点到目的地交换节点的方向离开至少一个子网一次并在路由的进一步过程中再次返回到子网的路由。 然后从已经确定的路由形成路由信息。

公开(公告)号：US06614760B1

公开(公告)日：2003-09-02

申请号：US09288663

申请日：1999-04-09

申请人： Muneyuki Suzuki ,  Yutaka Seki ,  Hidetaka Yoshikawa ,  Kiyotaka Tsuji ,  Atsushi Nakagawa

发明人： Muneyuki Suzuki ,  Yutaka Seki ,  Hidetaka Yoshikawa ,  Kiyotaka Tsuji ,  Atsushi Nakagawa

IPC分类号： H04L1224

CPC分类号： H04L12/5601 ,  H04L2012/5639

摘要： ATM transmission equipment provided between existing exchange or terminals of carrier equipment that, for example, can emulate existing transmission paths, and also implement T point interfaces for an in-home unit. The ATM transmission equipment detects communication anomalies or extracts maintenance/operation information from data strings on STM lines, such as high-speed digital lines or ISDN lines, and replaces only the necessary information resulting from those extractions or detections with alarm signals. The alarm signals are then transmitted together with information channels to the ATM network via a cell assembler/dissembler. The information channels and alarm information that arrive from the ATM network are rearranged into STM line data strings and output to LT units, DSUs, or terminals.

摘要翻译： 提供在例如可以模拟现有传输路径的载波设备的现有交换机或终端之间的ATM传输设备，并且还为家庭内单元实现T点接口。 ATM传输设备检测通信异常，或者从诸如高速数字线路或ISDN线路的STM线路上的数据串中提取维护/操作信息，并且仅用由报警信号提取或检测得到的必要信息来代替。 然后通过信元汇编/解析器将报警信号与信息信道一起发送到ATM网络。 从ATM网络到达的信息通道和报警信息重新排列成STM行数据串，并输出到LT单元，DSU或终端。

公开(公告)号：US06459705B1

公开(公告)日：2002-10-01

申请号：US09415763

申请日：1999-10-08

申请人： Shelley Cheng

发明人： Shelley Cheng

IPC分类号： H04L1224

CPC分类号： H04L49/901 ,  H04L12/12 ,  H04L49/90 ,  Y02D50/20 ,  Y02D50/40 ,  Y02D50/42

摘要： A network interface is provided for a host computer system that includes a host computer connected to an external computer network via an external network interface. The external network interface includes a host computer physical layer that provides a connection to the external computer network, a host computer media access control layer connected to the host computer through a media independent interface, and an isolation block connected to the media independent interface between the host computer physical layer and the host computer media access control layer. The isolation block is activated when the host computer enters a sleep state such that the host computer media access control layer is disconnected from the host computer physical layer and the network interface is activated. The network interface comprises a network interface media access control layer that is connected to the media independent interface. A network interface buffer manager is coupled to the network interface media access control layer. A network interface buffer memory is coupled to the network interface buffer manager. The network interface buffer manager is configured to transfer frame data between the network interface buffer memory and the media independent interface via the network interface media access control layer.

摘要翻译： 为主计算机系统提供网络接口，该主机系统包括通过外部网络接口连接到外部计算机网络的主计算机。 外部网络接口包括提供到外部计算机网络的连接的主机物理层，通过媒体独立接口连接到主计算机的主机计算机媒体访问控制层，以及连接到媒体独立接口之间的隔离块 主机物理层和主机介质访问控制层。 当主计算机进入休眠状态，使得主机计算机媒体访问控制层与主机物理层断开并且网络接口被激活时，隔离块被激活。 网络接口包括连接到媒体独立接口的网络接口介质访问控制层。 网络接口缓冲器管理器耦合到网络接口介质访问控制层。 网络接口缓冲存储器耦合到网络接口缓冲器管理器。 网络接口缓冲器管理器被配置为经由网络接口​​介质访问控制层在网络接口缓冲存储器和与媒体无关的接口之间传送帧数据。

公开(公告)号：US06452927B1

公开(公告)日：2002-09-17

申请号：US08581242

申请日：1995-12-29

申请人： Craig S. Rich

发明人： Craig S. Rich

IPC分类号： H04L1224

CPC分类号： H04L12/5601 ,  H04L49/3081 ,  H04L2012/5604

摘要： An extender circuit provides a serial communication interface between an ATM layer and a PHY layer. The extender circuit includes a first circuit serially coupled to a second circuit. The first circuit communicates in parallel with the ATM layer, and the second circuit communicates in parallel with the PHY layer. The extender circuit additionally includes a serial link which serially transmits signals between the first and second circuits. The serial link includes a first serial link for transmitting a first serial signal from the first circuit to the second circuit, and a second serial link transmitting a second serial signal from the second circuit to the first circuit. The first circuit and the second circuit include similar architecture. The first circuit includes a parallel interface circuit for communicating in parallel with the ATM layer and a serial interface circuit coupled to the parallel interface circuit for serially communicating with the second circuit. The parallel interface circuit includes control circuitry, such as a programmable logic device, and memory circuitry, such as a first-in-first-out (FIFO) memory device. The serial interface circuit includes serializing/deserializing circuitry which includes serializing circuitry for serializing a plurality of parallel signals received from the parallel interface circuit and outputting a plurality of serial output signals. The serializing/deserializing circuitry further includes deserializing circuitry for deserializing a plurality of serial input signals to form a plurality of deserialized signals and providing the deserialized signals to the parallel interface circuit.

摘要翻译： 扩展电路在ATM层和PHY层之间提供串行通信接口。 扩展器电路包括串联耦合到第二电路的第一电路。 第一电路与ATM层并行通信，第二电路与PHY层并行通信。 扩展器电路还包括在第一和第二电路之间串行发送信号的串行链路。 串行链路包括用于从第一电路向第二电路发送第一串行信号的第一串行链路，以及将第二串行信号从第二电路传输到第一电路的第二串行链路。 第一电路和第二电路包括类似的结构。 第一电路包括用于与ATM层并行通信的并行接口电路和耦合到并行接口电路的串行接口电路，用于与第二电路串联通信。 并行接口电路包括诸如可编程逻辑器件的控制电路和诸如先进先出（FIFO）存储器设备的存储器电路。 串行接口电路包括串行/反序列化电路，其包括串行化电路，用于串行从并行接口电路接收的多个并行信号并输出​​多个串行输出信号。 串行化/反序列化电路还包括反序列化电路，用于反序列化多个串行输入信号以形成多个反序列化信号并将并行接口电路提供反序列化信号。

公开(公告)号：US06366581B1

公开(公告)日：2002-04-02

申请号：US08831776

申请日：1997-04-02

申请人： Thomas C. Jepsen

发明人： Thomas C. Jepsen

IPC分类号： H04L1224

CPC分类号： H04Q11/0478 ,  H04L41/18 ,  H04L41/22 ,  H04L41/32 ,  H04L41/5006 ,  H04L41/5045 ,  H04L2012/5619 ,  H04L2012/563

摘要： Using a graphical user interface, the user is requested to enter a type of permanent virtual connection desired to be created. Based on the type of permanent virtual connection desired to be created, it is determined what data is necessary to generate the permanent virtual connection. Using a graphical user interface, the user is requested to enter the data determined to be necessary. When the user is requested to enter a type of permanent virtual connection desired to be created, information is requested from the user as to whether a point-to-point connection or a point-to-multipoint connection is desired, as to whether a virtual path connection or a virtual channel connection is desired, as to a desired quality of service, as to how billing data is to be collected, and as to a type of traffic to be handled by the permanent virtual connection. The data is assembled in a form recognizable by a telecommunications switch. The data is partially assembled in a form recognizable by a telecommunications switch and displayed as the user is requested to enter data. The form recognizable by a telecommunications switch has positional parameters recognized by the telecommunications switch based on position and key word parameters recognizable by the telecommunications switch based on an arrangement of characters. Both the positional parameters and the key word parameters are ordered in a predetermined order.

摘要翻译： 使用图形用户界面，请求用户输入期望创建的永久虚拟连接的类型。 基于希望创建的永久虚拟连接的类型，确定生成永久虚拟连接所需的数据。 使用图形用户界面，请求用户输入确定为必要的数据。 当请求用户输入期望生成的永久虚拟连接的类型时，从用户请求关于点对点连接或点对多点连接是否需要的信息，关于虚拟 路径连接或虚拟通道连接，关于期望的服务质量，如何收集计费数据以及要由永久虚拟连接处理的流量类型。 数据以电信交换机可识别的形式进行组装。 数据部分地以电信交换机可识别的形式组装，并且当用户被要求输入数据时显示。 由电信交换机识别的形式具有基于电话交换机基于字符排列的电信交换机可识别的位置和关键字参数识别的位置参数。 位置参数和关键字参数都按预定顺序排列。

公开(公告)号：US06754183B1

公开(公告)日：2004-06-22

申请号：US09332347

申请日：1999-06-14

申请人： Behfar Razavi ,  Owen M. Densmore ,  Guy W. Martin

发明人： Behfar Razavi ,  Owen M. Densmore ,  Guy W. Martin

IPC分类号： H04L1224

CPC分类号： H04W92/02 ,  G01C21/26 ,  H04L12/413 ,  H04L29/12367 ,  H04L61/2514 ,  H04L67/12 ,  H04L67/34 ,  H04W8/26 ,  H04W76/19

摘要： A system for communicating between a first network and a second network, wherein the first network may alternately communicate through one of a plurality of communication devices, each having a different IP address. In one embodiment, the first network is contained in a vehicle. The first network initiates communications through one of the communication devices and communicates the IP address of this currently-used device to a proxy server. If communications are lost, the first network attempts to establish communications through another of the communication devices. In a first mode, the first network communicates with the second network directly, using the IP address of the currently-used communication device for return communications. In a second mode, the first network communicates with the second network directly, but return communications are routed through the proxy server, which forwards them to the first network. When the second network is expected to quickly respond to the communications of the first network, the first mode is normally used since the current communication device is expected to maintain communication over the short term. If return communications are expected to be slow, the second mode is normally used since the current communication device is expected to lose communication at some point over the long term. In some situations, a hybrid of the first and second modes is used.

摘要翻译： 一种用于在第一网络和第二网络之间进行通信的系统，其中所述第一网络可以交替地通过多个通信设备之一进行通信，每个通信设备具有不同的IP地址。 在一个实施例中，第一网络被包含在车辆中。 第一网络通过一个通信设备发起通信，并将该当前使用的设备的IP地址传送给代理服务器。 如果通信丢失，则第一网络尝试通过另一个通信设备建立通信。 在第一模式中，第一网络使用当前使用的通信设备的IP地址直接与第二网络进行通信，用于返回通信。 在第二模式中，第一网络直接与第二网络通信，但返回通信通过代理服务器路由，代理服务器将其转发到第一网络。 当第二网络预期对第一网络的通信进行快速响应时，通常使用第一模式，因为预期当前通信设备将在短期内保持通信。 如果预期返回通信速度较慢，则通常使用第二模式，因为预期当前通信设备将在长期的某个时间点失去通信。 在某些情况下，使用第一和第二模式的混合。

公开(公告)号：US06584073B1

公开(公告)日：2003-06-24

申请号：US09323963

申请日：1999-06-02

申请人： Guy L. Steele, Jr. ,  Steven K. Heller ,  Jon Wade

发明人： Guy L. Steele, Jr. ,  Steven K. Heller ,  Jon Wade

IPC分类号： H04L1224

CPC分类号： G06F15/17343

摘要： In accordance with methods and systems consistent with the present invention, a number of improved network topologies are provided that have been selected to improve network performance based on various performance characteristics. The topologies are also selected to facilitate network reconfiguration, including adding nodes and removing, nodes. As a result, the network topologies in accordance with methods and systems consistent with the present invention do not follow a rigid, predefined pattern; rather, these topologies have been selected for network performance purposes as well as reconfiguration purposes.

摘要翻译： 根据与本发明一致的方法和系统，提供了许多改进的网络拓扑，其已被选择以基于各种性能特征来改善网络性能。 还选择拓扑以便于网络重新配置，包括添加节点和删除节点。 结果，根据与本发明一致的方法和系统的网络拓扑不遵循刚性的预定义模式; 相反，这些拓扑已被选择用于网络性能目的以及重新配置目的。

公开(公告)号：US06483834B1

公开(公告)日：2002-11-19

申请号：US09209065

申请日：1998-12-10

申请人： Bruce Fredrick Salisbury

发明人： Bruce Fredrick Salisbury

IPC分类号： H04L1224

CPC分类号： H04Q11/0478 ,  H04L49/253 ,  H04L49/55 ,  H04L2012/5626 ,  H04L2012/5647 ,  Y10S370/905

摘要： A system for creating a switched virtual circuit that includes a switch that receives initial information and a connection management system that is electrically connected to the switch, wherein the switch sends a signal to the connection management system that contains information as to the proper connection for the initial information and wherein the connection management system creates a virtual circuit that will reconfigure and transmit the initial information in such a manner that no information is lost when the initial information is transmitted by the virtual circuit.

摘要翻译： 一种用于创建包括接收初始信息的交换机和电连接到交换机的连接管理系统的交换虚拟电路的系统，其中交换机向连接管理系统发送信号，该连接管理系统包含关于适当连接的信息 初始信息，并且其中所述连接管理系统创建将以这样的方式重新配置和发送所述初始信息的虚拟电路，使得当所述虚拟电路发送所述初始信息时，没有信息丢失。

公开(公告)号：US06347334B1

公开(公告)日：2002-02-12

申请号：US09225949

申请日：1999-01-06

申请人： Kenneth J. Fredericks ,  Michael E. O'Donnell ,  Joseph C. Elliott

发明人： Kenneth J. Fredericks ,  Michael E. O'Donnell ,  Joseph C. Elliott

IPC分类号： H04L1224

CPC分类号： H04L49/357 ,  H04L49/351

摘要： A method for implementing a link level service in a computer network having a first port device and a second port device. Node identification data is stored in the second port device. A physical-layer communications coupling is provided between the first port device and the second port device which may be a point-to-point, loop, or switched circuit connection. The first port device sends a request node identification (RNID) message addressed to the second port device. The second port device creates an accept message and copies stored node identification data into the accept message. The second port device sends the accept message to the first port device.

摘要翻译： 一种用于在具有第一端口设备和第二端口设备的计算机网络中实现链路级业务的方法。 节点识别数据存储在第二端口设备中。 在第一端口设备和第二端口设备之间提供物理层通信耦合，其可以是点到点，环路或者交换电路连接。 第一端口设备发送寻址到第二端口设备的请求节点标识（RNID）消息。 第二端口设备创建接受消息，并将存储的节点标识数据复制到接受消息中。 第二个端口设备将接收消息发送到第一个端口设备。