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11.1.3.2. GPRS in telemetry applications
GSM/GPRS technology is possibly the ideal solution for telemetry and control of dispersed
objects.
The undisputable advantages are:
Use of an existing advanced structure of GSM transmission structure.
The gigantic range of the network – works everywhere!
Low cost of establishing and utilizing the system
No need for specialized antenna systems
The possibility of building networked systems
No necessity for retransmission
Full access protection on operator and hardware level
Cost of transmission system maintenance rests with network operator
Easy rescaling and reconfiguration of the system
Great availability of various receiving terminals
Easy setup of temporary systems
Only transmitted data volume is charged
For proper operation of terminals - GSM/GPRS network nodes, one needs a SIM card with
GPRS service enabled, permission to log in to existing APN and a static IP assignment.
A static IP address is the base for addressing terminals in packet transmission GPRS
networks.
Note that when using GPRS for real time monitoring, packet transmission networks add a
delay dependent of the route the addressed packet has to go between the sender and
recipient terminal. Usually this delay does not exceed a few seconds and is insignificant
from a monitoring perspective. In turn, the possibility of creating networks independent of
terrain topography and territorial size of the system is gained.
11.1.4. EDGE
EDGE
(Enhanced Data rates for GSM Evolution) is a technology for data transmission
employed in GSM networks.
This is an extension of GPRS technology ( EDGE is also called for EGPRS - Enhanced
GPRS), with enhanced radio interface allowing triple throughput (in most of current
systems up to 236.8 kbit/s) and dynamic adjustment of packet transmission speed
depending on transmission conditions.
11.1.5. UMTS
Universal Mobile Telecommunications System (
UMTS
) is a system of third generation
cellular phone networks following 2G systems like GSM. The new radio interface
significantly improved data transfer between the subscriber and the network boosting the
quality of service (384 kbit/s throughput).
11.1.6. HSDPA
HSDPA
(High Speed Downlink Packet Access) is a technology based on shared
transmission channel. The main feature is dynamic adaptation to changes in radio
environment and quick retransmission of faulty data. The HSDPA technology allows
transmission from the network to device with 14,4 Mb/s speed.