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。