HP mt40 Mobile Thin Client Reference Guide

HP Velocity

Technology Overview

Microsoft, Windows, and Windows Vista are U.S. registered trademarks of Microsoft Corporation.

Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor's standard commercial license.

The information contained herein is subject to change without notice.The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

Third Edition: May 2013

First Edition: June 2012

Document Part Number: 689165-003

Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

HP Velocity technology overview 4

Quality of Experience with HP Velocity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Benefits of HP Velocity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

HP Velocity components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

LiveQ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

TCP QoE and packet loss. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

UDP QoE and packet loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Packet loss protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Target Loss Rate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Encoding modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

LiveWiFi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

WiFi prioritization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

TCP on WiFi . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

LiveTCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

TCP congestion avoidance mechanisms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

TCP algorithms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

TCP Tuning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

LiveTCP congestion control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

HP Velocity technology overview

Quality of Experience with HP Velocity

HP Velocity is a Quality of Service (QoS) software engine that improves the overall Quality of Experience (QoE) for real-time network applications.

Real-time streaming applications delivered over data networks can be compromised by packet loss and transmission latency; this results in stop-and-go behavior, loss of interactivity, and an overall reduction in the throughput of an application.The experience dissatisfies application users.

Available on HP thin clients, HP Velocity easily integrates with existing systems to improve the QoE of a streaming application by tackling the underlying problems found in today's networks: packet loss, latency, and jitter.

HP Velocity automatically ensures the best end-user QoE by optimizing the underlying network to meet the requirements of bandwidth-intensive applications over wired and wireless, managed and unmanaged networks. By managing packet loss, WiFi congestion, and the impact of network latency, HP Velocity improves QoS, providing a better experience for the end user.

HP Velocity continuously monitors end-to-end network conditions to select the most appropriate data delivery mechanism. Rich reporting capabilities enable HP Velocity to provide end-to-end visibility to key flow information (Figure 1). The system's network monitoring and reporting tools capture in-depth statistics to log files, and displays them in the Management GUI for further analysis and problem detection to resolve network issues.

Figure 1. View of flow information for a local endpoint

HP Velocity Technology Overview 4

NOTE: HP Velocity protects flows between HP thin clients and HP Velocity-enabled virtual desktops or terminal services servers.

Benefits of HP Velocity

Adaptive network analysis

Monitoring HP Velocity collects and reports an extensive set of statistics:

Packet loss protection

Latency mitigation

Congestion detection

WiFi acceleration HP Velocity automatically reduces latency and transmission times

HP Velocity continuously monitors end-to-end network conditions for individual data flows, providing adaptive optimizations and data flow protection.

• System Information: Operating system, network adapter, CPU, and memory usage.

• Endpoint network statistics: Network loss rates, corrected loss rates, throughput, and latency.

• Per flow network statistics: Network loss rates, corrected loss rates, throughput, and latency.

HP Velocity protects against packet loss, which is key to improving an application's QoE. Packet loss reduces application throughput, degrades or halts streaming applications, and introduces lag for interactive applications.

HP Velocity boosts application QoE in a high-latency environment. By actively adapting TCP, HP Velocity automatically calibrates congestion control parameters for each TCP flow, based on the conditions present in the network.

HP Velocity automatically detects network congestion and adapts accordingly to maximize QoE.

for wireless networks and minimizes protocol overhead, resulting in improved QoE for WiFi applications.

Seamless integration

Lightweight HP Velocity is delivered as a lightweight implementation, which

HP Velocity Technology Overview 5

HP Velocity is a transparent, plug-and-play solution, which provides QoE benefits to all applications and users.

achieves QoE benefits while keeping system resource utilization to a minimum.

+ 10 hidden pages