公开(公告)号：US5521907A

公开(公告)日：1996-05-28

申请号：US429217

申请日：1995-04-25

Applicant: James D. Ennis, Jr. ,  John E. Hasselkus ,  Thomas R. Nisbet ,  Robert Troutman

Inventor： James D. Ennis, Jr. ,  John E. Hasselkus ,  Thomas R. Nisbet ,  Robert Troutman

IPC: H04L12/24 ,  H04L12/26 ,  H04L12/56 ,  H04Q11/04

CPC classification number: H04L41/5038 ,  H04L43/0864 ,  H04L67/2804 ,  H04L67/2819 ,  H04Q11/0478 ,  H04L2012/5619 ,  H04L2012/5649 ,  H04L43/106 ,  H04L43/12 ,  H04L43/16

Abstract: Measurement of round-trip delay or travel time in a communications network during in-service operation is accomplished by use of two probes, situated at respective points of interest along the communication network, and a processor. The probes receive identifiable data patterns normally transmitted over the communications network and generate a time stamp when each pattern arrives at or leaves the respective point. Each probe further generates a pattern identifier based on the data in the pattern and stores the identifier and time stamp as a pair in a buffer internal to each probe. Once the internal buffer contents exceed a predetermined amount of data, the processor receives the data from the buffers and matches pattern identifiers between the buffers to locate the departure and arrival time stamps of each pattern traveling between the probe points. Thereafter, the processor calculates an average of round-trip delay or travel times based on the departure and arrival time stamps of several patterns traveling in both directions between the probe points.

Abstract translation: 在使用操作期间在通信网络中的往返延迟或行进时间的测量通过使用位于通信网络的相关兴趣点处的两个探测器和处理器来实现。 探测器接收通常通过通信网络发送的可识别的数据模式，并且当每个模式到达或离开相应点时产生时间戳。 每个探测器还基于模式中的数据进一步生成模式标识符，并将标识符和时间戳一对存储在每个探测器内部的缓冲器中。 一旦内部缓冲器内容超过预定量的数据，处理器从缓冲器接收数据并且匹配缓冲器之间的模式标识符，以定位在探测点之间行进的每个模式的出发和到达时间戳。 此后，处理器基于在探测点之间的两个方向上行进的几个模式的出发和到达时间戳来计算往返延迟或行进时间的平均值。

公开(公告)号：US5867483A

公开(公告)日：1999-02-02

申请号：US746416

申请日：1996-11-12

Applicant: James D. Ennis, Jr. ,  John E. Hasselkus ,  Robert J. Norberg ,  Robert Troutman ,  Matthew A. Tucker

Inventor： James D. Ennis, Jr. ,  John E. Hasselkus ,  Robert J. Norberg ,  Robert Troutman ,  Matthew A. Tucker

IPC: H04L12/24 ,  H04J3/14 ,  H04L12/26

CPC classification number: H04L41/22 ,  H04L41/0896 ,  H04L41/142 ,  H04L41/24 ,  H04L43/02 ,  H04L43/045 ,  H04L43/0882 ,  H04L43/0888 ,  H04L43/12

Abstract: A system for measuring peak throughput in packetized data networks includes a remote monitoring probe and console. The probe is connected to a packetized data network to monitor network activity, while the console is in communication with the probe via a communications medium. The probe maintains a plurality of counters associated with different ranges of utilization percentage for access channel and individual circuit bandwidth. For each sampling interval, the probe measures the access channel and individual circuit bandwidth utilization and increments the appropriate counters associated with the percentage ranges encompassing the measured bandwidth utilizations. The console polls the probe for the percentage counter data to selectively display the access channel or individual circuit bandwidth utilization in the form of a bar graph and pie chart. The access channel and/or individual circuit bandwidth may ultimately be adjusted based on the displayed data. Alternatively, the system may analyze the data and determine conservative, moderate and aggressive recommendations for bandwidth adjustment. In addition, the system can generate reports containing the access channel or individual circuit bandwidth utilization for a user-specified time period, and the recommendations for bandwidth adjustment.

Abstract translation: 用于测量打包数据网络中峰值吞吐量的系统包括一个远程监视探测器和控制台。 探测器连接到打包数据网络以监视网络活动，而控制台通过通信介质与探测器通信。 探测器保持与接入信道和单独电路带宽的不同利用率范围相关联的多个计数器。 对于每个采样间隔，探头测量访问通道和单独的电路带宽利用率，并增加与包含测量带宽利用率的百分比范围相关联的适当计数器。 控制台轮询探测器的百分比计数器数据，以条形图和饼图的形式选择性地显示访问通道或单独的电路带宽利用率。 可以基于显示的数据最终调整接入信道和/或单独的电路带宽。 或者，系统可以分析数据并确定带宽调整的保守，中等和积极的建议。 此外，系统可以生成包含用户指定时间段的接入信道或单独电路带宽利用率的报告，以及带宽调整的建议。

公开(公告)号：US6058102A

公开(公告)日：2000-05-02

申请号：US187611

申请日：1998-11-06

Applicant: R. Scott Drysdale ,  James D. Ennis, Jr. ,  John E. Hasselkus ,  Thomas R. Nisbet ,  Robert C. Troutman ,  Kenneth J. Rehbehn ,  David E. Wheeler, Jr.

Inventor： R. Scott Drysdale ,  James D. Ennis, Jr. ,  John E. Hasselkus ,  Thomas R. Nisbet ,  Robert C. Troutman ,  Kenneth J. Rehbehn ,  David E. Wheeler, Jr.

IPC: H04L1/24 ,  H04L12/24 ,  H04L12/26 ,  H04L12/56 ,  H04Q11/04 ,  H04J3/14

CPC classification number: H04L43/12 ,  H04L1/24 ,  H04L12/24 ,  H04L41/00 ,  H04L41/5009 ,  H04L41/5038 ,  H04L43/0864 ,  H04Q11/0478 ,  H04L2012/5628 ,  H04L2012/5647 ,  H04L2012/5649 ,  H04L41/5019 ,  H04L43/062 ,  H04L43/0811 ,  H04L43/0829 ,  H04L43/0888 ,  H04L43/106

Abstract: A data transmission system includes probes connected between end user sites and a data switching network. Each probe is connected to the switching network via an access channel wherein transmission circuits establish paths between the sites through the access channel and switching network. The probes capture and retransmit data traveling between the sites over respective transmission circuits, and can thereby insert service level analysis (SLA) messages into the data traffic in order to actively communicate network performance information to other probes. For each transmission circuit, the probes periodically collect measurements related to one or more network performance metrics, including: round-trip delay (RTD), data delivery ratio (DDR) and network availability. During each SLA measurement cycle, a sequence of SLA messages is exchanged over each transmission circuit, which messages contain data used to determine RTD and DDR. Optionally, the SLA message contents and protocol are designed to allow the SLA messages to be encapsulated in a single, standard data unit of any conventional data transmission protocol, such as an ATM cell. Consequently, the messaging system can be used with any data transmission protocol and in interworked networks without modification of the message data payload. The SLA measurements collected by the probes can be transmitted to a console in communication with the probes for processing, display, and archiving.

Abstract translation: 数据传输系统包括连接在终端用户站点和数据交换网络之间的探测器。 每个探测器经由接入信道连接到交换网络，其中传输电路通过接入信道和交换网络在站点之间建立路径。 探测器捕获并重传通过各个传输电路在站点之间传播的数据，从而可以将服务水平分析（SLA）消息插入到数据业务中，以便将网络性能信息主动地传送到其他探测器。 对于每个传输电路，探测器周期性地收集与一个或多个网络性能度量相关的测量，包括：往返延迟（RTD），数据传送比（DDR）和网络可用性。 在每个SLA测量周期期间，在每个传输电路上交换一系列SLA消息，哪些消息包含用于确定RTD和DDR的数据。 可选地，SLA消息内容和协议被设计为允许将SLA消息封装在诸如ATM信元的任何常规数据传输协议的单个标准数据单元中。 因此，消息系统可以与任何数据传输协议和互通网络一起使用，而不修改消息数据有效载荷。 探头收集的SLA测量可以传输到与探头通信的控制台，用于处理，显示和归档。