ion and all warranties and conditions, whether express or implied by statute, common law or otherwise, are
hereby excluded to the extent permitted by English law. INMARSAT is a trademark of the International Mobile Satellite Organisation, Inmarsat LOGO is a trademark of
Inmarsat (IP) Company Limited. Both trademarks are licensed to Inmarsat Global Limited. � Inmarsat Global Limited 2006. All rights reserved. 2/18 BGAN and IP data connections



Contents

1.0.

Introduction 3

1.1.

About this guide
3

1.2.

Terminology 3

1.3.

Other sources of information
3


2.0.

BGAN and IP data connections
4

2.1.

Standard IP
4

2.2.

Streaming IP
5


3.0.

BGAN and PDP contexts
7

3.1.

About PDP contexts
7

3.2.

BGAN and PDP contexts
8

3.3.

PDP Contexts on the HNS 9201
9

3.4.

PDP contexts on the Explorer 500
10

3.5.

PDP contexts on the WorldPro 1000
11

3.6.

Summary 11


4.0.

BGAN and IP addressing
13

4.1.

IP addressing on the HNS 9201
13

4.2.

IP addressing on the Explorer 500
13


5.0.

Using TCP/IP and UDP/IP
16

5.1.

Recommendations 16

5.2.

About TCP/IP
16

5.3.

About UDP/IP
16

5.4.

Optimization and Tips
17


3/18 BGAN and IP data connections



1.0. Introduction
1.1.
About this guide
This document explains how IP data connections operate on the BGAN network, and explains how
each terminal manages IP data connections.

It is intended for first time end-users, Distribution Partners, Service Providers and anyone who
wants to use a BGAN terminal to connect to the BGAN network and use network services. A
previous knowledge of satellite communications is useful, but not essential.

This document covers the following topics:

BGAN and IP data connections introduces Standard IP and Streaming IP, connections
designed to meet all your IP data requirements.

BGAN and PDP contexts provides an overview of PDP contexts. A PDP context provides
essential information about your data connections to the BGAN network.

BGAN and IP addressing explains how the HNS 9201 and Explorer 500 allocate IP
addresses. (The Nera WorldPro 1000 does not allocate IP addresses.)

Using TCP/IP and UDP/IP gives recommendations on the use of applications based on
TCP/IP and UDP/IP, and provides tips on how to maximize performance.

1.2.
Terminology
The following terms are used in this document. A brief explanation of each is given.

QoS Quality of Service (QoS) specifies a guaranteed throughput rate for data. On the
BGAN terminal, you have the choice of transferring data at rates of up to 256kbps,
depending on the terminal.

PDP context A Packet Data Protocol (PDP) context transfers information about your
data connections between the BGAN terminal and the BGAN network. The PDP context
defines connection aspects such as routing, QoS and security. The BGAN terminal opens a
primary PDP context or a secondary PDP context, depending on the IP data connection
type. Refer to BGAN and PDP contexts for details.

Traffic Flow Template A Traffic Flow Template (TFT) is a series of filters that allows
traffic that passes the filters to be routed on a particular PDP context, and given a different
QoS to traffic on other PDP contexts. TFTs enable the terminal to have more than one
PDP context open simultaneously.

1.3.
Other sources of information
This is one of a series of PDF documents that make up the BGAN Solutions Guide. The
Solutions Guide is designed to help you make the most of your BGAN terminal. Other
documents in the series are available for download from www.inmarsat.com/bgan. Click
on BGAN support, then click on How to guides.

This Web site also gives further information on the BGAN service, including Industry
solutions.
4/18 BGAN and IP data connections



2.0. BGAN and IP data connections
BGAN supports two types of IP data connection, designed to meet the full range of your IP data
requirements. They are:

Standard IP.

Streaming IP.

NOTE: Refer to the Getting Started guide for the specific BGAN terminal for
information on opening and closing an IP data connection.
2.1.
Standard IP


A Standard IP data connection is pre-configured on the BGAN terminal.

It offers data rates of up to 492kbps (depending on the terminal) over a best effort, shared
connection.

Standard IP is best suited to typical office applications, such as Internet browsing, e-mail and
FTP.

You can configure BGAN LaunchPad to open a Standard IP connection by default when you
register with the BGAN network, or you can open a Standard IP connection manually after
registration. The default setting depends on the BGAN terminal you are using.

Refer to your BGAN Service Provider for details on how you are charged for a standard IP
connection.
5/18 BGAN and IP data connections



TIP: There may be a minimum charge when an IP data connection is open, and data
may be transferred across the connection even if you are not actively using an
application (for example, your computer may be receiving automatic updates).
If you do not want to incur these charges, you can switch off automatic
connection using BGAN LaunchPad, or close the data connection after
registration.
2.2.
Streaming IP


Streaming IP is optimized for use with audio and video applications, such as Streambox, Win Media
and QuickTime. You can configure your own Streaming IP data connections on the BGAN
terminal, and open two or more streaming IP connections in addition to the standard IP connection.

In the diagram above, a standard IP connection is open, and is being shared by terminal users for IP
data applications such as Internet and e-mail services. In addition, two dedicated streaming IP
sessions are open. The first, at 32kbps, is being used exclusively for an audio streaming application.
The second, at 256kbps, is being used exclusively for a video streaming application.

NOTE: BGAN LaunchPad is supplied with a number of pre-configured streaming IP
data connections, which you can use as an alternative to the standard IP
connection. Note that, as with the standard IP connection, all terminal traffic is
shared on a pre-configured streaming IP connection. To maximize the
performance of streaming IP, Inmarsat recommends that you configure and use
your own dedicated streaming IP connections.
6/18 BGAN and IP data connections



Streaming connections are available at one of the following data rates:

o 32kbps streaming.
o 64kbps streaming.
o 128kbps streaming (HNS 9201 and Explorer 500 only).
o 256kbps streaming (HNS 9201 only).

Streaming IP is optimized for use with UDP applications, such as video and audio.

The Quality of Service (QoS) is consistent and guaranteed. However, observed throughput
may be slower than the rate you select because of overheads, such as the packet header
size of the application you are using. In addition, any interconnect with terrestrial networks
may impact throughput.



Inmarsat recommends that you configure each streaming IP connection that you require
using BGAN LaunchPad. In BGAN LaunchPad, these customized streaming IP connections
are called dedicated streaming IP connections.

You must assign a dedicated streaming IP connection to a specific application, such as Win
Media. You do this by selecting a traffic flow template (TFT) when you configure the
connection. This ensures that the application does not share the connection with any other
traffic.

The standard IP connection must be open before you can open a dedicated streaming IP
connection. This is because a dedicated streaming IP connection uses the routing
information of the standard IP connection. (Note that you can open one of the pre-
configured streaming IP connections as an alternative to the standard IP connection.)


One or more dedicated streaming IP connections can be open in addition to the standard
IP connection. The maximum number depends on the terminal (refer to BGAN and PDP
contexts on page 7 for details).



You can configure as many dedicated streaming IP connections as you require.


Refer to your BGAN Service Provider for details on how you are charged for a streaming
IP connection.


BGAN and QoS
To guarantee the Quality of Service (QoS), Inmarsat provides QoS on the satellite
interfaces, and supports QoS in the BGAN network. The Quality of Service is
negotiated between the terminal and the BGAN Core Network when you open a data
connection.

To ensure a consistent data rate across the connection, you must ensure that end-
to-end QoS is supported for the desired data rate. To ensure end-to-end QoS, a
dedicated streaming connection must be in place between your BGAN Service
Provider and your corporate headquarters, including any terrestrial interconnect. 7/18 BGAN and IP data connections



3.0. BGAN and PDP contexts
3.1.
About PDP contexts
The BGAN network manages resources using Packet Data Protocol (PDP) contexts.

When you open an IP data connection, a PDP context is opened automatically. This PDP context
must be established in the BGAN terminal and BGAN/UMTS core network for you to be able to
transfer data across the network. A PDP context defines connection aspects such as routing, Quality
of Service (QoS), security and billing between the terminal and network.

When you first open a PDP context, the terminal requests sufficient radio resources (that is, power
and bandwidth