 With convergence of voice, data and video over satellite becoming more common, some organizations are encountering TCP/IP performance limitations. Typical satellite links exhibit both high latency and bit error rates (impaired links), which can be challenging for the transmission of TCP. With this connection-oriented protocol, a number of factors contribute to its performance degradation over impaired links, including: |
- The time required for an acknowledgement can severely limit the ramp up in transmission rate
- Sender’s small window size reduces throughput
- Delay that is interpreted as network congestion versus propagation causes reduced transmission rates
- Packet loss that is interpreted as network congestion versus corruption causes reduced transmission rates
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Transparent TCP Acceleration |
Comtech EF Data's turboIP Performance Enhancement Proxies were designed to combat the inherent challenges of transmitting TCP over satellite links. Two models are available, turboIP-45 and turboIP, offering the same features and functionality but with different levels of throughput. The units provide transparent acceleration of TCP sessions, increasing throughput over satellite links while requiring minimal topology changes. The Performance Enhancement Proxies are standards-based, supporting the Space Communications Protocol Standard Transport Protocol (SCPS-TP). They provide reliable connection-oriented, end-to-end data transfer for user applications. turboIP and turboIP-45 can also overcome the deficiencies that exist with TCP, including slow start and congestion control. Since they interoperate with TCP/IP networks and devices, turboIP and turboIP-45 can be seamlessly integrated into existing networks in a staged manner, avoiding the need for network-wide upgrades. |
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Throughput (Bi-Directional) |
| Maximum single session |
- turboIP-45 ~ 45 Mbps
- turboIP ~ 15 Mbps
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Maximum aggregate throughput |
- turboIP-45 ~ 45 Mbps
- turboIP ~ 15 Mbps
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| Available in a 1RU platform, turboIP is deployed in government and military agencies plus commercial environments around the globe. Common applications for this performance enhancement proxy are supporting organizations utilizing satellite links for Internet backbone trunking services and organizations with large or evolving satellite bandwidth requirements for Internet traffic. |
Performance Enhancement Proxies (PEP)