Chapter 1 • Overview
1037852-0001 Revision A
7
generally eliminate the need for an external router at remote
sites. Router functions include flexible addressing with
support for routing information protocol (RIP), network
address and port translation (NAPT), port forwarding, DHCP
service and DHCP relay, DNS caching, and firewall
capability.
•
PEP Data acceleration
– All HX satellite routers implement
the Hughes PEP (performance enhancement proxy for TCP)
feature, which includes bidirectional TCP spoofing, data and
header compression, IP priority levels, ACK reduction, and
message multiplexing.
•
Built-in network security
– The HX System offers built-in
network security as a standard feature. All data transmissions
to satellite routers are encrypted to ensure that only
authorized modems access the transmission. Bidirectional
encryption is available as an option.
•
Adaptive inroute selection (AIS)
- A satellite router can
select an optimal symbol and coding rate for its inroute
transmission as a function of a configured trajectory table and
through information it learns about its transmission from a
closed loop power control algorithm. See the bulleted
description above for
Robust rain fade mitigation
techniques
.
•
Cost-effective gateway
– The HX gateway is optimized to
support small networks. It occupies a small physical space
and provides a very cost-effective solution for small
networks.
Broadband applications
HX Systems support the following services:
•
Mobility
- HX systems support the use of mobile satellite
routers through the use of the following primary enabling
technologies:
– Closed Loop Timing
– Spreading
– Doppler
•
Broadband IP connectivity
– The HX System offers a
completely private high-speed network with
performance-enhancing features that maximize performance
and network efficiency. The performance of individual
applications (interactive and file transfer) can be
independently managed with Hughes performance-enhancing
proxy parameters.
•
GSM backhaul
– The HX system can be configured as an IP
pipe and used as a global system for mobile communication
Summary of Contents for HX System
Page 1: ...1037852 0001 Revision A September 4 2008 HX System System Overview Release 1 2 7 ...
Page 8: ... Contents viii 1037852 0001 Revision A ...
Page 10: ... Figures x 1037852 0001 Revision A ...
Page 12: ... Tables xii 1037852 0001 Revision A ...
Page 24: ...Chapter 1 Overview 12 1037852 0001 Revision A ...
Page 26: ...Chapter 2 Subsystems 14 1037852 0001 Revision A Figure 3 HX Subsystems and LAN Connections ...
Page 50: ...Chapter 4 Network security 38 1037852 0001 Revision A ...
Page 62: ...Chapter 5 Bandwidth management 50 1037852 0001 Revision A ...
Page 70: ...Chapter 6 IP features 58 1037852 0001 Revision A ...
Page 80: ...Chapter 8 Transmission features 68 1037852 0001 Revision A ...
Page 88: ...Chapter 10 HX options 76 1037852 0001 Revision A ...
Page 96: ...Appendix B Transportable Gateway TGW 84 1037852 0001 Revision A ...
Page 100: ... Acronyms and abbreviations 88 1037852 0001 Revision A ...
Page 106: ... Index 94 1037852 0001 Revision A ...