Ximpo Group

SCPS-TP - Linux TCP stack enhancements

The Customer

The customer provides WAN utilization appliances including: Compression, Acceleration, Layer 7 classification and Quality of Service.

The Product

The product is an appliance which improves network utilization.
In addition to bandwidth expansion capabilities, it provides a rich set of features that improve application's response times and provide layer 7 visibility and control tools that enable network managers to align network resources with business priorities.
This combination of features is achieved through next-generation WAN compression, application-specific acceleration, Layer 7 QoS capabilities and sophisticated monitoring and reporting.
The product is available for IP or serial traffic and can support acceleration of encrypted traffic. It can support mesh networks and can be deployed On-Path (between the LAN segment and router) or On-LAN by connecting to a switch in the LAN segment.
One of the product's available plug-ins provides TCP acceleration, enabling transfers in excess of bandwidth, latency and packet loss limitations. Implemented according to NASA developed SCPS-TP protocol (www.scps.org).

About SCPS

SCPS (Space Communications Protocol Standards) is a set of networking protocols designed and developed as a joint effort by the DoD and NASA, in order to determine feasibility of standardizing end-to-end data communications across civil and military space systems.
SCPS-TP is SCPS's underlying retransmission control protocol, optimized to provide reliable end-to-end delivery of spacecraft command and telemetry messages between computers that are communicating over a network containing one or more potentially unreliable space data transmission paths. The SCPS-TP is based on the well-known Internet Transmission Control Protocol (TCP).
The extensions to TCP specified by SCPS-TP are applicable in fields beyond spacecraft command, and can solve similar problems in environments, such as those of the mobile/wireless and tactical communications communities.

The Challenge

Ximpo Group's Networking and Kernel experts were hired to perform the design, development and integration of the SCPS components for the product.
In order to best use SCPS and Linux's TCP stack features while reducing the latency overhead to the minimum, Ximpo Group's experts engineered a performance intensive solution based on the addition of SCPS features into the Linux Kernel's TCP stack, while optimizing the kernel configuration and adding other in-kernel acceleration mechanisms which improve the system performance even more.
During the final phases of development, it was discovered that the delivered solution, outperformed the original analysis.
The clear conclusion was that the configuration optimization along with the in-kernel acceleration mechanisms have contributed to improving the system's performance more than what was expected from the SCPS features alone.
The work concluded with the integration of the solution into the customer's management system, knowledge transfer, and escorting until market-deployment.

The product is already in the market, generating multi-million dollar sales, and highly acclaimed for some of its unique features.

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