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    • 3. 发明授权
    • Method and system for monitoring and management of the performance of real-time networks
    • 监控和管理实时网络性能的方法和系统
    • US07453815B1
    • 2008-11-18
    • US10735982
    • 2003-12-15
    • David A. GrabelskyIkhlaq S. SidhuGuido M. SchusterJacek A. Grabiec
    • David A. GrabelskyIkhlaq S. SidhuGuido M. SchusterJacek A. Grabiec
    • H04J3/14H04L12/26
    • H04L43/067H04L43/06H04L43/08
    • Gateway routers for real-time networks have the ability to collect delay, loss, and jitter statistics on a per-connection basis. It is possible to use this information not only to monitor the quality of individual voice calls and other real-time connections, but also to evaluate the overall performance of the underlying network. This paper describes a method for monitoring and managing the performance of a real-time data network that supports voice, video and other real-time services. In the described embodiments, the RTCP mechanisms of RTP for sender and receiver reporting be used to relay performance information to one or more network monitoring sites for analysis and interpretation. In addition, gateway routers are organized and managed within a hierarchy that allows the monitoring function to localize it view of network conditions within the hierarchy; and the monitoring of network performance can occur on various time scales.
    • 用于实时网络的网关路由器可以在每个连接的基础上收集延迟,丢失和抖动统计信息。 可以使用此信息不仅可以监视单个语音通话和其他实时连接的质量,还可以评估底层网络的整体性能。 本文介绍了一种用于监视和管理支持语音,视频和其他实时业务的实时数据网络性能的方法。 在所描述的实施例中,用于发送者和接收者报告的RTP的RTCP机制用于将性能信息中继到一个或多个网络监控站点用于分析和解释。 此外,网关路由器在层次结构内组织和管理,允许监视功能将其视图中的网络条件定位在层次结构中; 网络性能的监控可以在不同的时间尺度上进行。
    • 4. 发明授权
    • System and method for providing telephone service having private branch exchange features in a voice-over-data network telephony system
    • 用于在数据网络话音系统中提供具有专用分支交换特征的电话业务的系统和方法
    • US06804224B1
    • 2004-10-12
    • US09515365
    • 2000-02-29
    • Guido M. SchusterIkhlaq S. SidhuJerry J. MahlerFrederick D. DeanJacek A. Grabiec
    • Guido M. SchusterIkhlaq S. SidhuJerry J. MahlerFrederick D. DeanJacek A. Grabiec
    • H04L1266
    • H04M7/1285H04M7/1245
    • A system and method for providing telephone service to a user of a telecommunications device using a data network service provider. The data network service provider has a local service host that is accessible by a local access identifier. A caller uses a telecommunications device to dial the local access identifier to connect to the local service host. In response to a prompt, the caller dials a telephone extension that identifies the callee's telecommunications device. The local service host receives the telephone extension and verifies that the callee is a subscriber. The local service host then retrieves the gateway nearest the callee telecommunications device and opens a voice-over-data channel between the callee and caller gateways. The telephone conversation then proceeds between the callee and caller telecommunications devices over a public switched telephone network connection to the caller gateway, the voice-over-data channel and the PSTN connection to the callee telecommunications device.
    • 一种用于使用数据网络服务提供商向电信设备的用户提供电话服务的系统和方法。 数据网络服务提供商具有可由本地访问标识符访问的本地服务主机。 呼叫者使用电信设备拨打本地接入标识符来连接本地业务主机。 响应于提示,呼叫者拨打一个电话分机,标识被叫方的电信设备。 本地服务主机接收电话分机,并验证被叫方是否为用户。 本地服务主机然后检索最近被叫电信设备的网关,并在被叫方和呼叫者网关之间打开数据通道。 电话会话然后通过公共交换电话网连接到呼叫者网关,语音数据信道和到被叫电信设备的PSTN连接,在被叫方和呼叫者电信设备之间进行。
    • 9. 发明授权
    • Method and apparatus for measurement-based conformance testing of service level agreements in networks
    • 网络中服务级别协议的基于测量的一致性测试的方法和装置
    • US06363053B1
    • 2002-03-26
    • US09246606
    • 1999-02-08
    • Guido M. SchusterMichael S. BorellaJacek A. GrabiecIkhlaq S. Sidhu
    • Guido M. SchusterMichael S. BorellaJacek A. GrabiecIkhlaq S. Sidhu
    • G01R3108
    • H04L41/5003H04L41/5009H04L43/50H04L47/24
    • A method and apparatus for measurement-based conformance testing of service level agreements in networks. The method includes first collecting quality of service information from network traffic over a plurality of network nodes. Then, the collected quality of service information is compared to a plurality of specified quality of service levels. A plurality of possible virtual quality of service pathways through a plurality of network nodes is provided, based on the compared quality of service information. One embodiment of the method includes the additional step of creating a virtual connection using the compared quality of service information. In another embodiment of the method, the step of collecting quality of service information from network traffic over a plurality of network nodes includes first transmitting test traffic from a source to a destination over a plurality of network nodes. The transmitted test traffic is then received at the destination, and quality of service information is identified by comparing characteristics of the test traffic transmitted by the source to characteristics of the test traffic received by the destination.
    • 一种用于网络中服务级别协议的基于测量的一致性测试的方法和装置。 该方法包括首先通过多个网络节点从网络流量收集服务质量信息。 然后,将所收集的服务质量信息与多个指定的服务质量水平进行比较。 基于所比较的服务质量信息,提供通过多个网络节点的多个可能的虚拟服务质量路径。 该方法的一个实施例包括使用所比较的服务质量信息创建虚拟连接的附加步骤。 在该方法的另一实施例中,从多个网络节点上的网络业务收集服务质量信息的步骤包括首先通过多个网络节点从源向目的地发送测试业务。 然后在目的地接收所发送的测试业务,并且通过将源发送的测试业务的特征与目的地接收到的测试业务的特性进行比较来识别服务质量信息。