公开(公告)号：US10659367B2

公开(公告)日：2020-05-19

申请号：US15974905

申请日：2018-05-09

Applicant: Citrix Systems, Inc.

Inventor： Mustafa Kutluk Testicioglu ,  Mahesh Mylarappa

IPC: H04W4/00 ,  H04L12/803 ,  H04W28/02 ,  H04L12/26 ,  H04L5/00 ,  H04L12/801 ,  H04L12/825

Abstract: An appliance for controlling data transmission is described. The appliance includes a packet engine configured to acquire data regarding a flow of first data packets over a link and to determine transport communication protocol (TCP) characteristics for the flow. The appliance also includes a data transmission controller configured to receive second data packets, determine a rate of transmission based on the TCP characteristics, and determine, based on one or more criteria, whether to use a rate-based data transmission control to control a transmission of the second data packets. The data transmission controller is also configured to, responsive to determining that a rate-based data transmission control is to be used to control a transmission of the second data packets, cause the packet engine to transmit the second data packets in groups, wherein transmission times of each group of second data packets are determined based on the rate of transmission.

公开(公告)号：US10594609B2

公开(公告)日：2020-03-17

申请号：US15982324

申请日：2018-05-17

Applicant: CITRIX SYSTEMS, INC.

Inventor： Mustafa Kutluk Testicioglu ,  Georgios Tsolis ,  Lampros Dounis

IPC: H04L12/26 ,  H04L12/801 ,  H04L29/08 ,  H04L29/06 ,  H04L12/807 ,  H04L12/841 ,  H04L29/14

Abstract: An apparatus and method of providing improved throughput on delay-based congestions comprising a packet engine and a delay-based congestion controller are provided. The packet engine detecting a delay jitter that is caused by a layer 2 retransmission of a data packet, is configured to measure a round trip time (RTT) value. The delay-based congestion controller is configured to receive the RTT value and to determine a smoothed RTT (SRTT) value using the RTT value and one or more moving average functions. The delay-based congestion controller is also configured to, if the SRTT value is smaller than a set minimum SRTT value, assign the SRTT value to the set minimum SRTT value. The delay-based congestion controller is further configured to, if the SRTT value is larger than a set maximum SRTT value, assign the SRTT value to the set maximum SRTT value.

公开(公告)号：US20150055659A1

公开(公告)日：2015-02-26

申请号：US13975161

申请日：2013-08-23

Applicant: Citrix Systems, Inc.

Inventor： Mustafa Kutluk Testicioglu ,  Seth K. Keith

IPC: H04L12/863

CPC classification number: H04L47/6225 ,  H04L47/2441 ,  H04L47/527 ,  H04L47/6295

Abstract: The embodiments are directed to methods and appliances for scheduling a packet transmission. The methods and appliances can assign received data packets or a representation of data packets to one or more connection nodes of a classification tree having a link node and first and second intermediary nodes associated with the link node via one or more semi-sorted queues, wherein the one or more connection nodes correspond with the first intermediary node. The methods and appliances can process the one or more connection nodes using a credit-based round robin queue. The methods and appliances can authorize the sending of the received data packets based on the processing.

Abstract translation: 实施例涉及用于调度分组传输的方法和装置。 所述方法和装置可以经由一个或多个半排序队列将接收的数据分组或数据分组的表示分配给具有链路节点和与链路节点相关联的第一和第二中间节点的分类树的一个或多个连接节点，其中 一个或多个连接节点对应于第一中间节点。 方法和设备可以使用基于信用的循环队列处理一个或多个连接节点。 方法和设备可以基于处理授权接收到的数据分组的发送。

公开(公告)号：US12267245B2

公开(公告)日：2025-04-01

申请号：US17835565

申请日：2022-06-08

Applicant: Citrix Systems, Inc.

Inventor： Seth Kenneth Keith ,  Mustafa Kutluk Testicioglu

IPC: H04L47/24 ,  H04L43/026 ,  H04L43/0888 ,  H04L43/0894 ,  H04L43/16 ,  H04L43/20 ,  H04L47/12 ,  H04L47/36

Abstract: Described embodiments improve the performance of a computer network via selectively forwarding packets to bypass quality of service (QoS) processing, avoiding processing delays during critical periods of high demand, increasing throughput and efficiency may be increased by sacrificing a small amount of QoS accuracy. QoS processing may be applied to a subset of packets of a flow or connection, referred to herein as “lazy” processing or lazy byte batching. Packets that bypass QoS processing may be immediately forwarded with the same QoS settings as packets of the flow for which QoS processing is applied, resulting in tremendous overhead savings with only minimal decline in accuracy. In case of backlog, packets may be collected together into an aggregated or ‘uber’ packet, with QoS processing applied based on a virtual size of the aggregated packet.

公开(公告)号：US10164726B2

公开(公告)日：2018-12-25

申请号：US15847657

申请日：2017-12-19

Applicant: Citrix Systems, Inc.

Inventor： Mustafa Kutluk Testicioglu ,  Seth Keith

IPC: H04J3/06 ,  G06F9/00 ,  H04L12/869 ,  H04L12/863 ,  H04L12/823 ,  H04L29/08

Abstract: A method comprising: receiving, by a first network packet scheduler, from each other network packet scheduler of a plurality of network packet schedulers, a virtual packet for each traffic class of a plurality of traffic classes defining relative transmission priority of network packets; receiving, by the first network packet scheduler, a network packet of a first traffic class of the plurality of traffic classes; transmitting, by the first network packet scheduler, each virtual packet into a virtual connection of a plurality of virtual connections created for each traffic class; scheduling, by the first network packet scheduler, a network packet or a virtual packet as a next packet in a buffer for transmission; determining, by the first network packet scheduler, that the next packet in the buffer is a virtual packet; and discarding, by the first network packet scheduler, the virtual packet, responsive to the determination that the next packet in the buffer is a virtual packet.

公开(公告)号：US20180302328A1

公开(公告)日：2018-10-18

申请号：US16007560

申请日：2018-06-13

Applicant: Citrix Systems, Inc.

Inventor： Seth Kenneth Keith ,  Mustafa Kutluk Testicioglu

IPC: H04L12/851 ,  H04L12/805 ,  H04L12/801

Abstract: Described embodiments improve the performance of a computer network via selectively forwarding packets to bypass quality of service (QoS) processing, avoiding processing delays during critical periods of high demand, increasing throughput and efficiency may be increased by sacrificing a small amount of QoS accuracy. QoS processing may be applied to a subset of packets of a flow or connection, referred to herein as “lazy” processing or lazy byte batching. Packets that bypass QoS processing may be immediately forwarded with the same QoS settings as packets of the flow for which QoS processing is applied, resulting in tremendous overhead savings with only minimal decline in accuracy. In case of backlog, packets may be collected together into an aggregated or ‘uber’ packet, with QoS processing applied based on a virtual size of the aggregated packet.

公开(公告)号：US09755973B2

公开(公告)日：2017-09-05

申请号：US13961850

申请日：2013-08-07

Applicant: Citrix Systems, Inc.

Inventor： Mustafa Kutluk Testicioglu ,  Seth K. Keith

IPC: H04L12/801 ,  H04L12/927 ,  H04W72/08 ,  H04L12/851 ,  H04L12/825

CPC classification number: H04L47/11 ,  H04L47/24 ,  H04L47/25 ,  H04L47/805 ,  H04W72/087

Abstract: A system and method is provided for scheduling data packets. The system includes one or more packet engines configured to provide one or more congestion indications for a plurality of connections of a communication link. The system also includes a packet scheduler configured to receive the one or more congestion indications, estimate a link rate of the communication link using the one or more congestion indications and classification information, and schedule the data packets for transmission via the plurality of connections using the estimated link rate and the classification information.

公开(公告)号：US20170126345A1

公开(公告)日：2017-05-04

申请号：US14927867

申请日：2015-10-30

Applicant: Citrix Systems, Inc.

Inventor： Mustafa Kutluk Testicioglu ,  Seth Keith

IPC: H04J3/06 ,  H04L12/823 ,  H04L29/08

CPC classification number: H04J3/0658 ,  G06F9/00 ,  H04L47/32 ,  H04L47/60 ,  H04L47/6215 ,  H04L47/6265 ,  H04L69/324

Abstract: A method comprising: receiving, by a first network packet scheduler, from each other network packet scheduler of a plurality of network packet schedulers, a virtual packet for each traffic class of a plurality of traffic classes defining relative transmission priority of network packets; receiving, by the first network packet scheduler, a network packet of a first traffic class of the plurality of traffic classes; transmitting, by the first network packet scheduler, each virtual packet into a virtual connection of a plurality of virtual connections created for each traffic class; scheduling, by the first network packet scheduler, a network packet or a virtual packet as a next packet in a buffer for transmission; determining, by the first network packet scheduler, that the next packet in the buffer is a virtual packet; and discarding, by the first network packet scheduler, the virtual packet, responsive to the determination that the next packet in the buffer is a virtual packet.

公开(公告)号：US20220303221A1

公开(公告)日：2022-09-22

申请号：US17835565

申请日：2022-06-08

Applicant: Citrix Systems, Inc.

Inventor： Seth Kenneth Keith ,  Mustafa Kutluk Testicioglu

IPC: H04L47/24 ,  H04L47/12 ,  H04L47/36 ,  H04L43/026 ,  H04L43/0888 ,  H04L43/16

Abstract: Described embodiments improve the performance of a computer network via selectively forwarding packets to bypass quality of service (QoS) processing, avoiding processing delays during critical periods of high demand, increasing throughput and efficiency may be increased by sacrificing a small amount of QoS accuracy. QoS processing may be applied to a subset of packets of a flow or connection, referred to herein as “lazy” processing or lazy byte batching. Packets that bypass QoS processing may be immediately forwarded with the same QoS settings as packets of the flow for which QoS processing is applied, resulting in tremendous overhead savings with only minimal decline in accuracy. In case of backlog, packets may be collected together into an aggregated or ‘uber’ packet, with QoS processing applied based on a virtual size of the aggregated packet.

公开(公告)号：US20210184977A1

公开(公告)日：2021-06-17

申请号：US16716040

申请日：2019-12-16

Applicant: Citrix Systems, Inc.

Inventor： Mustafa Kutluk Testicioglu ,  Anil Shetty

IPC: H04L12/851 ,  H04L12/823 ,  H04L12/879 ,  H04L29/06

Abstract: Described embodiments provide systems and methods for CPU load and priority based early drop packet processing. A device can establish a priority level for each traffic class of a plurality of traffic classes. The device can receive a plurality of packets. The device can determine a processing level of one or more processors of the device prior to processing the plurality of packets. The device can select one or more packets of the plurality of packets to drop responsive to the priority level of one or more traffic classes associated with the one or more packets and the processing level of the one or more processors.