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1. 发明授权

US09806980B2 Methods, systems, and computer readable media for precise measurement of switching latency of packet switching devices 有权
公开(公告)号：US09806980B2
公开(公告)日：2017-10-31
申请号：US14228101
申请日：2014-03-27
申请人： Ixia
发明人： Michael D. Hutchison , Christopher M. Kowalski
IPC分类号： H04L12/26
CPC分类号： H04L43/50 , H04L43/0864
摘要： Methods, systems, and computer readable media for precise measurement of switching latency of packet switching devices are disclosed. One method includes steps implemented in a network equipment test device including at least one processor. The method includes transmitting frames to a device under test. The method further includes receiving one of the transmitted frames from the device under test. The method further includes determining a measured latency of the device under test based on a difference between a time that the one frame was transmitted to the device under test and a time that the one frame was received from the device under test. The method further includes determining an indication of backlog latency of the device under test caused by the device under test inserting a virtual lane marker in traffic transmitted to the network equipment and reporting the indication of the backlog latency.

2. 发明授权

US09712419B2 Integrated switch tap arrangement and methods thereof 有权
公开(公告)号：US09712419B2
公开(公告)日：2017-07-18
申请号：US13346651
申请日：2012-01-09
申请人： Eldad Matityahu , Robert Shaw , Dennis Carpio , Ky Le
发明人： Eldad Matityahu , Robert Shaw , Dennis Carpio , Ky Le
IPC分类号： H04L12/26
CPC分类号： H04L43/12 , H04L43/0876
摘要： An integrated switch tap device for managing and monitoring network traffic is provided. The device includes a set of network ports for receiving and outputting the network traffic. The device also includes a first logic arrangement for performing routing functionalities and a first CPU for processing the routing functionalities. The device further includes a set of monitoring ports that is coupled to one or more monitoring devices. The device yet also includes a first tap module, which is configured at least for intercepting at least part of the network traffic flowing through the network device, creating a copy of at least part of the network traffic, and forwarding the copy to at least one of the set of monitoring ports. The device moreover includes a second CPU configured at least for processing tap functionalities associated with the first tap module.

3. 发明授权

US09641419B2 Methods and systems for providing background pretesting of communications or storage network equipment 有权
公开(公告)号：US09641419B2
公开(公告)日：2017-05-02
申请号：US14581931
申请日：2014-12-23
申请人： Ixia
发明人： Noah Gintis
IPC分类号： G06F11/00 , H04L12/26
CPC分类号： H04L43/50 , H04L43/0811 , H04L43/10
摘要： Methods, systems, and computer readable media for background testing of communications or storage network equipment are provided. One method includes receiving a control plane definition from a user. The control plane definition may specify emulated network equipment and network protocols run by the emulated network equipment. The method further includes, after receiving the control plane definition, automatically performing at least one background test during an idle time period by sending traffic from the emulated network equipment to at least one device under test and outputting results of the at least one background test to the user.

4. 发明授权

US09491081B2 Methods, systems, and computer readable media for generating test packets in a network test device using value list caching 有权
标题翻译：用于使用值列表缓存在网络测试设备中生成测试分组的方法，系统和计算机可读介质
公开(公告)号：US09491081B2
公开(公告)日：2016-11-08
申请号：US13478083
申请日：2012-05-22
申请人： Gerald R. Pepper , Matthew R. Bergeron , Johnny Tsung Lin Ho
发明人： Gerald R. Pepper , Matthew R. Bergeron , Johnny Tsung Lin Ho
IPC分类号： G06F12/00 , H04L12/26 , H04L12/24
CPC分类号： H04L43/10 , H04L41/5038 , H04L43/50
摘要： Methods, systems, and computer readable media for generating test packets in a network device using value lists caching are disclosed. In one method, value lists are stored in dynamic random access memory of a network test device. Each value lists includes values for user defined fields (UDFs) to be inserted in test packets. Portions of each value lists are read into per-port caches. The UDF values are drained from the per-port caches using per-port stream engines to generate and send streams of test packets to one or more devices under test. The per-port caches are refilled with portions of the value lists from the DRAM and a rate sufficient to maintain the sending of the stream engine packets to the one or more devices under test.
摘要翻译：公开了使用价值列表缓存在网络设备中生成测试分组的方法，系统和计算机可读介质。在一种方法中，值列表存储在网络测试设备的动态随机存取存储器中。每个值列表包括要插入到测试包中的用户定义字段（UDF）的值。每个值列表的部分被读入每个端口缓存。使用每端口流引擎从每端口缓存中排除UDF值，以生成测试包流并将其发送给一个或多个待测设备。每个端口高速缓存被重新填充来自DRAM的值列表的一部分，以及足以维持将流引擎分组发送到被测试的一个或多个设备的速率。

5. 发明授权

US09473342B2 Methods, systems, and computer readable media for single and multi-carrier downlink and uplink control information resolution 有权
标题翻译：用于单载波和多载波下行链路和上行链路控制信息分辨率的方法，系统和计算机可读介质
公开(公告)号：US09473342B2
公开(公告)日：2016-10-18
申请号：US13826862
申请日：2013-03-14
申请人： Ixia
发明人： Ramanathan Asokan
IPC分类号： H04L5/00 , H04L27/26
CPC分类号： H04L27/2647 , H04L5/001
摘要： The subject matter described herein includes methods, systems, and computer readable media for single and multi-carrier downlink and uplink control information resolution. A method for downlink and uplink control information resolution includes receiving a downlink signal including downlink control information and uplink control information. The downlink signal is processed to segregate at least some of the downlink control information in the signal from the uplink control information in the signal. The segregated downlink control information is processed using downlink control information processing resources. The uplink control information in the signal is processed using uplink control information processing resources.
摘要翻译：本文描述的主题包括用于单载波和多载波下行链路和上行链路控制信息分辨率的方法，系统和计算机可读介质。一种用于下行链路和上行链路控制信息分解的方法包括：接收包括下行链路控制信息和上行链路控制信息的下行链路信号。处理下行链路信号以从信号中的上行链路控制信息中分离信号中的下行链路控制信息中的至少一些。使用下行链路控制信息处理资源来处理分离的下行链路控制信息。使用上行控制信息处理资源对信号中的上行控制信息进行处理。

6. 发明授权

US09436566B2 Methods, systems, and computer readable media for scaling a workload 有权
标题翻译：用于缩放工作负载的方法，系统和计算机可读介质
公开(公告)号：US09436566B2
公开(公告)日：2016-09-06
申请号：US14445921
申请日：2014-07-29
申请人： Ixia
发明人： Sumit Panda , Sujit Kundu , Pratyush Kumar Khan , Narottam Pattanayak
IPC分类号： G06F11/00 , G06F11/263 , G06F11/22 , G06F11/34
CPC分类号： G06F11/263 , G06F11/2205 , G06F11/3414 , G06F2201/87 , G06F2201/875
摘要： Methods, systems, and computer readable media for scaling a workload are disclosed. According to one exemplary method, the method occurs at a network equipment test device. The method includes generating a first workload comprising a plurality of messages associated with one or more transactions. The method also includes determining one or more workload segments in the first workload, wherein each of the one or more workload segments represents one or more messages associated with a particular transaction and generating a second workload using the one or more workload segments, wherein the second workload includes a number of the workload segments based on a workload scale attribute.
摘要翻译：公开了用于缩放工作负载的方法，系统和计算机可读介质。根据一个示例性方法，该方法发生在网络设备测试设备处。该方法包括生成包括与一个或多个事务相关联的多个消息的第一工作负载。该方法还包括确定第一工作负荷中的一个或多个工作负载段，其中所述一个或多个工作负载段中的每一个表示与特定事务相关联的一个或多个消息，并且使用所述一个或多个工作负载段生成第二工作负载，其中，工作负载包括基于工作量规模属性的多个工作负载段。

7. 发明授权

US09432859B2 Methods, systems, and computer readable media for testing long term evolution (LTE) air interface device using per-user equipment (per-UE) channel noise 有权
标题翻译：用于使用每用户设备（每UE）信道噪声测试长期演进（LTE）空中接口设备的方法，系统和计算机可读介质
公开(公告)号：US09432859B2
公开(公告)日：2016-08-30
申请号：US14069215
申请日：2013-10-31
申请人： Ixia
发明人： Prasada Rao Devarasetty , Zhiyong Yan , Roger Alan Slyk , Ramanathan Asokan
IPC分类号： H04W4/00 , H04W24/06
CPC分类号： H04W24/06 , H04B17/0085 , H04W52/241
摘要： Methods, systems, and computer readable media for testing an air interface device using per user equipment (UE) channel noise are disclosed. One method includes, generating uplink signals at a network equipment test device to be transmitted from plural simulated UEs to an air interface device under test. The method further includes generating and applying per-UE channel noise to the signals, where applying per-UE channel noise includes applying different channel noise to at least some of the uplink signals. The method further includes transmitting the uplink signals with the per-UE channel noise to the air interface device under test.
摘要翻译：公开了用于使用每用户设备（UE）信道噪声测试空中接口设备的方法，系统和计算机可读介质。一种方法包括：在要从多个模拟UE发送到被测试的空中接口设备的网络设备测试设备处产生上行链路信号。所述方法还包括生成并应用每个UE信道噪声给信号，其中应用每UE信道噪声包括对至少一些上行链路信号应用不同的信道噪声。该方法还包括将具有每UE信道噪声的上行链路信号发送到被测试的空中接口设备。

8. 发明授权

US09426284B2 Methods, systems, and computer readable media for call flow analysis using comparison level indicators 有权
标题翻译：方法，系统和计算机可读介质，用于使用比较级别指标进行呼叫流分析
公开(公告)号：US09426284B2
公开(公告)日：2016-08-23
申请号：US14540005
申请日：2014-11-12
申请人： Ixia
发明人： Robert Winn Prewitt, II , Kalyan Sundhar , Martin Robert Mathieson
IPC分类号： H04W24/06 , H04M3/36
CPC分类号： H04M3/362
摘要： Methods, systems, and computer readable media for call flow analysis using comparison level indicators (CLIs) are disclosed. One exemplary method includes emulating a plurality of user devices, transmitting test traffic to at least one device under test (DUT) using the emulated user devices, receiving traffic from the at least one DUT in response to the traffic transmitted by the emulated user devices, and analyzing the traffic received from the at least one DUT using one or more CLIs, wherein each CLI indicates particular information associated with the traffic to analyze or compare.
摘要翻译：公开了使用比较级别指示器（CLI）的用于呼叫流分析的方法，系统和计算机可读介质。一种示例性方法包括：仿真多个用户设备，使用所仿真的用户设备向至少一个被测设备（DUT）发送测试业务，响应于所仿真的用户设备发送的流量从所述至少一个DUT接收业务，以及使用一个或多个CLI分析从所述至少一个DUT接收到的业务，其中每个CLI指示与要分析或比较的业务相关联的特定信息。

9. 发明授权

US09301170B2 Systems, methods, and computer readable media for utilizing a mobile robotic platform to conduct functionality testing in a wireless communications network 有权
标题翻译：用于利用移动机器人平台在无线通信网络中进行功能测试的系统，方法和计算机可读介质
公开(公告)号：US09301170B2
公开(公告)日：2016-03-29
申请号：US14229791
申请日：2014-03-28
申请人： Ixia
发明人： Madhu H. Rangappagowda , Jimmy Hardy , Qing Liu , Timothy Earl Bennington-Davis , Dane Bennington
IPC分类号： H04B17/00 , H04W24/00 , H04W24/06 , H04W88/08
CPC分类号： H04W24/06 , H04W88/08 , Y10S901/01
摘要： According to one aspect, the disclosed subject matter describes herein a system that includes a mobile robotic platform for navigating within a coverage area associated with an access point belonging to a communications network under test, wherein the mobile robotic platform includes a client device emulation module configured to emulate multiple client devices that are wirelessly connected to the access point and to send emulated test traffic data to the access point from each of the emulated client devices via a wireless connection. The mobile robotic platform also includes a real client device that includes a client application configured to communicate simulated test traffic data to the access point via an established wireless connection and a performance metrics module configured to determine wireless communication performance metrics associated with the wireless connection between the access point and at least one of the real client device or the emulated client devices.
摘要翻译：根据一个方面，所公开的主题在此描述了一种系统，其包括用于在与属于正在测试的通信网络的接入点相关联的覆盖区域内导航的移动机器人平台，其中所述移动机器人平台包括客户端设备仿真模块配置以模拟无线连接到接入点的多个客户端设备，并且经由无线连接将来自每个仿真的客户端设备的仿真测试业务数据发送到接入点。移动机器人平台还包括真实客户端设备，其包括被配置为经由建立的无线连接将模拟测试业务数据传送到接入点的客户端应用，以及性能度量模块，被配置为确定与无线连接之间的无线连接相关联的无线通信性能度量接入点和至少一个真实客户端设备或仿真客户端设备。

10. 发明授权

US09270497B2 Systems and methods for improved wireless channel estimation 有权
标题翻译：改进无线信道估计的系统和方法
公开(公告)号：US09270497B2
公开(公告)日：2016-02-23
申请号：US14308680
申请日：2014-06-18
申请人： Ixia
发明人： David Jennings Wicker, Jr. , Thomas Alexander
IPC分类号： H04B7/08 , H04L25/02 , H04B7/04
CPC分类号： H04L25/0242 , H04B7/0456 , H04L25/0236 , H04L2025/03426
摘要： Systems and methods are disclosed herein to provide improved channel estimation in a wireless data communication system, including but not limited to Multiple Input Multiple Output (MIMO) communication systems. In accordance with one or more embodiments and aspects thereof, a channel estimation system is disclosed that utilizes data payload portions of received wireless packets to calculate estimates of the radio frequency (RF) channel traversed by these packets, and iteratively refines and improves these estimates by selectively utilizing successive received packets according to the application of certain metrics. Such a system may offer improved capabilities such as: more accurate signal reception, reduced bit error ratio, and better reception of short data packets.
摘要翻译：本文公开了系统和方法，以在无线数据通信系统中提供改进的信道估计，包括但不限于多输入多输出（MIMO）通信系统。根据其一个或多个实施例和方面，公开了利用接收到的无线分组的数据有效载荷部分来计算由这些分组穿过的射频（RF）信道的估计的信道估计系统，并且迭代地优化并改进这些估计，根据特定度量的应用选择性地利用连续接收的分组。这样的系统可以提供改进的能力，例如：更准确的信号接收，降低的比特误码率和更好的接收短数据分组。

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