Other Satellite Navigation Systems - Understanding GPS: Principles and Applications - page 620

Table 11.4 BeiDou User Equipment Classes and Types
Class 1: General
User Terminals

Land vehicle terminal: The user equipment is designed to support all types of land vehi-
cles. The user equipment consists of an antenna and user terminal with liquid crystal
display (LCD) and built-in keypad. The terminal uses the vehicle's power and has a data
port to interface with an onboard computer. The user equipment provides all-weather
rapid-positioning, real-time navigation, and bidirectional short-text-message communi-
cation capability.
Ship terminal: The user equipment is designed to support ships within the BeiDou cov-
erage area. The user equipment consists of an antenna and user terminal with LCD and
built-in keypad. The terminal uses the ship's power and has a data port to interface
with an onboard computer. The user equipment provides all-weather rapid-positioning,
real-time navigation, and bidirectional short-text-message communication capability.
Handheld terminal: The user equipment is designed to support handheld applications.
The user equipment consists of the dual-mode antenna, the user terminal (with LCD),
PDA (or other handwriting device), and battery. The terminal has a data port to inter-
face with a remote computer. The terminal provides all-weather rapid-positioning,
real-time navigation, and bidirectional short-text-message communication capability.
Emergency reporting terminal: The user equipment is designed to make emergency
reports to police. The user equipment consists of the dual-mode antenna, the user termi-
nal (with LCD), PDA (or other handwriting device), and battery. The terminal provides
all-weather positioning, real-time navigation and bidirectional short-text message (up to
120 Chinese characters) communications capability.

Class 2: General
Communications
User Terminals

One-way communication user terminal: The user equipment is designed to receive mes-
sages over the BeiDou system. The user equipment consists of the receive-only antenna,
the user terminal (with LCD), PDA (or other handwriting device), and battery. The
terminal also has a data port to interface with an onboard computer. The terminal
can receive up to 120 Chinese characters and has a storage capacity of 4,800 Chinese-
character short-text messages.
Two-way correspondence user terminal: The user equipment is designed to send and
receive messages over the BeiDou system. The user equipment consists of the
send/receive antenna, the user terminal (with LCD), PDA (or other handwriting device),
and battery. The terminal also has a data port to interface with an onboard computer.
The terminal can send or receive short-text messages (up to 120 Chinese characters).
The user equipment can also provide all-weather positioning and real-time navigation.

One-way time service user terminal: The user equipment is designed for time synchroni-
zation using the BeiDou system in a passive mode. The user equipment consists of the
receive-only antenna, the user terminal, and battery. The terminal provides time and
frequency synchronization with 100-ns time accuracy.
Two-way time service user terminal: The user equipment is designed for time synchroni-
zation using the BeiDou system in an active mode. The user equipment consists of the
send/receive antenna, the user terminal, and battery. The terminal provides time and the
frequency synchronization with 20-ns time accuracy.

Class 3: Time
Dissemination
Terminals

Dispatcher terminal: The dispatcher terminal is designed to communicate with and mon-
itor the locations of users of the BeiDou system. The equipment consists of an antenna
and user terminal with a port for special data network connections. The terminal sup-
ports fleet management, real-time navigation, and bidirectional short-text-message com-
munications, and can monitor BeiDou user equipment in the field in real time.

Class 4: Central
Dispatcher User
Terminals

Multimode terminal: The multimode terminal is designed to use the BeiDou,
GLONASS, and GPS systems. The user equipment consists of the antenna and the user
terminal capable of working with BeiDou, GLONASS, and GPS. The terminal supports
both BeiDou-based and GLONASS/GPS-based fleet management, real-time navigation,
and bidirectional short-text-message communications.
Enhancement user terminal: The enhanced user terminal is designed to improve
GLONASS and GPS with differential corrections transmitted over the BeiDou system.
The user equipment consists of the antenna and the user terminal capable of working
with GPS, GLONASS, and BeiDou. The terminal supports all-weather rapid-position-
ing, real-time navigation, and bidirectional short-text-message communications.

Class 5: Multimode
User Terminals