Short Burst Data
Iridium Short Burst Data (SBD) service is a new data service that enables
value-added applications to send and receive short data transactions
efficiently over the Iridium network.
The Iridium Satellite network enables SBD to be offered on a global basis
through a single network point of presence. However, this is subject to
appropriate licensing and regulatory conditions. The basic architecture is
illustrated in the diagram below:
Short Burst Data (SBD) provides a new capability for vertical market
applications in the Oil, Gas, Rail, Maritime, Aeronautical, and Utility
industries as well as applications in the Government and Military sectors.
Remote Applications send Mobile Originated SBD (MO-SBD) data messages via an
Iridium
9522 L-Band Transceiver (“LBT”) or
the New
9601 LBT. The application
microcontroller or microprocessor communicates with the LBT using AT commands
over an RS232 serial port. The application loads the data message into the LBT
and instructs it to send the data message. The data message is transmitted
across the Iridium satellite network utilizing inter-satellite links to reach
the Iridium Gateway.
Mobile Terminated SBD (MT-SBD) messages are sent to the Iridium Gateway via
e-mail from our host computer system. MT-SBD data messages are delivered
to the LBT following a MO-SBD or “mail-box check” initiated by the remote
application.
The maximum length of a MO-SBD message is 1960 bytes. The maximum length of a
MT-SBD message is 1890 bytes. Global network transmit latency for delivery
of messages ranges from approximately 5 seconds for short messages to
approximately 20 seconds for maximum length messages.
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