公开(公告)号：US20180309655A1

公开(公告)日：2018-10-25

申请号：US15498452

申请日：2017-04-26

Applicant: Ixia

Inventor： Vinod Joseph ,  Alina Crina Balan ,  Alon Regev ,  Bogdan Tenea

IPC: H04L12/26 ,  H04J3/06

CPC classification number: H04L43/50 ,  H04J3/0667 ,  H04L43/045 ,  H04L43/0852 ,  H04L43/16

Abstract: Methods, systems, and computer readable media for testing time sensitive network (TSN) elements are disclosed. According to one method for testing a TSN element, the method occurs at a test system. The method includes synchronizing a test system clock with a clock at a system under test (SUT). The method also includes receiving a sequence of messages, wherein the sequence of messages is generated using schedule rules associated with a TSN stream. The method further includes determining, using timing information associated with the test system clock, whether the schedule rules are accurately implemented by the SUT.

公开(公告)号：US20160301589A1

公开(公告)日：2016-10-13

申请号：US14685552

申请日：2015-04-13

Applicant: Ixia

Inventor： Marian Rata ,  Codrut Dumitru Radoi ,  Vlad Stanciu ,  Bogdan Tenea

IPC: H04L12/26

CPC classification number: H04L43/0858 ,  H04L43/106

Abstract: A method for measuring one-way link delay includes transmitting a first packet from a first network device. The first packet is passively intercepted, a first copy of the first packet is transmitted to the first network device, and a second copy of the first packet is transmitted to a second network device. A time of receipt of the first copy of the first packet is recorded as an origin timestamp at the first network device. A time of receipt of the second copy of the first packet is recorded as a receive timestamp at the second network device. A second packet including the origin timestamp is transmitted from the first network device. The second packet is passively intercepted, and a first copy of the second packet is transmitted to the second network device. The first copy of the second packet is received at the second network device, and the origin timestamp is extracted from the first copy of the second packet. Link delay from the first network device to the second network device is calculated using the origin timestamp and the receive timestamp.

Abstract translation: 一种用于测量单向链路延迟的方法包括从第一网络设备发送第一分组。 第一分组被被动拦截，第一分组的第一副本被发送到第一网络设备，并且第一分组的第二副本被发送到第二网络设备。 在第一网络设备处将第一分组的第一副本的接收时间记录为原始时间戳。 在第二网络设备处将第一分组的第二副本的接收时间记录为接收时间戳。 从第一网络设备发送包括原始时间戳的第二分组。 被动截取第二个数据包，第二个数据包的第一个拷贝被发送到第二个网络设备。 在第二网络设备处接收第二分组的第一副本，并且从第二分组的第一副本中提取原始时间戳。 使用原始时间戳和接收时间戳计算从第一网络设备到第二网络设备的链路延迟。

公开(公告)号：US09923656B2

公开(公告)日：2018-03-20

申请号：US14809513

申请日：2015-07-27

Applicant: Ixia

Inventor： Bogdan Tenea ,  Alon Regev

IPC: H04L12/26 ,  H04J3/06 ,  H04J3/14 ,  G01R31/319

CPC classification number: H04J3/14 ,  G01R31/31922 ,  H04J3/0667 ,  H04L43/0852 ,  H04L43/106 ,  H04L43/50

Abstract: A system for testing recovered clock quality includes a test device for operating as a timing synchronization protocol master for communicating with a device under test functioning as a timing synchronization protocol slave or a timing synchronization protocol boundary clock to synchronize a clock of the device under test with a clock of the test device. The system further includes a recovered clock quality tester for receiving, from the device under test, a reverse synchronization message including clock information and for using the clock information to quantify a synchronization error between the clock of the device under test and the clock of the test device.

公开(公告)号：US20160315756A1

公开(公告)日：2016-10-27

申请号：US14809513

申请日：2015-07-27

Applicant: Ixia

Inventor： Bogdan Tenea ,  Alon Regev

IPC: H04L7/00

CPC classification number: H04J3/14 ,  G01R31/31922 ,  H04J3/0667 ,  H04L43/0852 ,  H04L43/106 ,  H04L43/50

Abstract: A system for testing recovered clock quality includes a test device for operating as a timing synchronization protocol master for communicating with a device under test functioning as a timing synchronization protocol slave or a timing synchronization protocol boundary clock to synchronize a clock of the device under test with a clock of the test device. The system further includes a recovered clock quality tester for receiving, from the device under test, a reverse synchronization message including clock information and for using the clock information to quantify a synchronization error between the clock of the device under test and the clock of the test device.

Abstract translation: 用于测试恢复的时钟质量的系统包括用作操作作为定时同步协议主机的测试设备，用于与被测设备进行通信，用作定时同步协议从站或定时同步协议边界时钟，以将被测设备的时钟与 测试设备的时钟。 该系统还包括恢复的时钟质量测试器，用于从被测器件接收包括时钟信息的反向同步消息，并且使用时钟信息来量化被测器件的时钟与测试时钟之间的同步误差 设备。

公开(公告)号：US20190098522A1

公开(公告)日：2019-03-28

申请号：US15721073

申请日：2017-09-29

Applicant: Ixia

Inventor： Bogdan Tenea ,  Robin Lee O'Connor ,  Shardendu Pandey ,  Alan Richard Schwenk

IPC: H04W24/08 ,  H04L12/26

Abstract: The subject matter described herein includes methods, systems, and computer readable media for correlating, load balancing and filtering tapped GTP and non-GTP packets. One method for correlating, load balancing and filtering tapped GTP and non-GTP packets includes receiving GTP packets tapped from a plurality of GTP network tap points. The method further includes receiving non-GTP packets tapped from at least one non-GTP network tap point. The method further includes correlating GTP packets with non-GTP packets for a particular subscriber. The method further includes forwarding the GTP packets and non-GTP packets correlated for the particular subscriber to a network monitoring tool.

公开(公告)号：US09699051B2

公开(公告)日：2017-07-04

申请号：US14685552

申请日：2015-04-13

Applicant: Ixia

Inventor： Marian Rat{hacek over (a)} ,  Codrut Dumitru R{hacek over (a)}doi ,  Vlad Stanciu ,  Bogdan Tenea

IPC: H04J1/16 ,  H04L1/00 ,  H04L12/26

CPC classification number: H04L43/0858 ,  H04L43/106

Abstract: A method for measuring one-way link delay includes transmitting a first packet from a first network device. The first packet is passively intercepted, a first copy of the first packet is transmitted to the first network device, and a second copy of the first packet is transmitted to a second network device. A time of receipt of the first copy of the first packet is recorded as an origin timestamp at the first network device. A time of receipt of the second copy of the first packet is recorded as a receive timestamp at the second network device. A second packet including the origin timestamp is transmitted from the first network device. The second packet is passively intercepted, and a first copy of the second packet is transmitted to the second network device. The first copy of the second packet is received at the second network device, and the origin timestamp is extracted from the first copy of the second packet. Link delay from the first network device to the second network device is calculated using the origin timestamp and the receive timestamp.