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Integrated Packet Processing

Rack of modems
Our advanced functionality allows for efficient IP networking and transport over satellite, and is available for select modems and the Advanced VSAT Solutions. Available options include header compression, payload compression, ultra low overhead streamline encapsulation and quality of service. When utilizing the advanced IP functionality, real-time traffic and other low priority traffic can seamlessly co-exist on the same link without impacting the voice quality or delivery of mission critical data. The functions provide high bandwidth efficiency, information security and simplified network de­sign/configuration.

Header Compression

Header compression can reduce the 40 byte IP/UDP/RTP header to as little as 1 byte. For TCP/IP, the 40 byte header is reduced to as little as 3 bytes. For applications such as VoIP, header compression can provide bandwidth savings exceeding 60%. E.g. 8 kbps G.729 voice codec requires 24 kbps of IP bandwidth once encapsulated into an IP/UDP/RTP datagram. With header compression, the same voice call needs about 8.5 kbps – a saving of almost 65%. Bandwidth requirements for typical Web/HTTP traffic can also be reduced by 10% or more with TCP/IP header compression.

Header Compression & Payload Compression
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Payload Compression

Implemented in the hardware for maximum throughput and efficiency, payload compression can reduce the required satellite bandwidth by as much as 40-50%.

Low Overhead Encapsulation

In SCPC modems, Ethernet packets are translated from burst frames into continuous data for transmission. Typically, HDLC is used as a wrapper to encapsulate Ethernet packets and provide the conversion from burst to continuous format. We developed techniques to dramatically improve the efficiency of this process and consume a fixed amount of overhead. Our patent-pending Streamline Encapsulation (SLE) can reduce the encapsulation overhead by as much as 65% compared to industry-standard HDLC.

Quality of Service (QoS)

Our multi-level QoS ensures the highest quality service with minimal jitter and latency for real-time traffic, priority treatment of mission critical applications and maximum bandwidth efficiency. Supported modes are:

  • DiffServ – Industry-standard method of providing QoS enabling seamless co-existence in networks that implement DiffServ
  • Max/Priority – Provides multi-level traffic prioritization with the ability to limit maximum traffic per priority class
  • Min/Max – Provides a Committed Information Rate (CIR) to each user defined class of traffic with the ability to allow a higher burstable rate depending on availability

When combined with header and payload compression, QoS ensures the highest quality of service with minimal jitter and latency for real-time traffic, priority treatment of mission critical applications and maximum bandwidth efficiency.