Industrial Wireless Control; Mobile Wireless Standards Gsm, Umts And Lte - Siemens SIMATIC NET System Manual

1.6

Industrial Wireless Control

1.6.1

Mobile wireless standards GSM, UMTS and LTE

Introduction
Industrial wireless control is the connection of widely distributed process stations to one or
more central control systems. Various wireless methods are used for the communication
required for monitoring and control. This makes service possible on installations without fixed
telephone lines. An Internet access is also not necessary for the installation.
GSM (2G)
GSM (Global System for Mobile Communication) was the first standard for the digital
transmission of languages and short messaging services. Industrial usage is limited to
telecontrol and text messaging.
GPRS (2.5G)
The General Packet Radio Service (GPRS) is a mobile wireless technology for packet-
switched data transmission via GSM networks (Global system for mobile communications).
The GSM wireless channels are divided into eight time slots. One time slot represents one
transmission channel.
Packet-switched data transmission means that in contrast to line-switched data transmission
(as with GSM), no transmission channel is reserved permanently. The sender divides the
message into individual packets with additional information (packet sequence, recipient
address). With the aid of the GPRS system, the packets are forwarded through various time
slots of the network. This makes it possible to use free capacity. A GPRS session can also
use several time slots at the same time. The recipient then puts together the packets in the
correct order. GPRS allows data exchange without connection establishment and billing only
according to the transferred amount of data. Packet switching is made possible by IP
technology. GPRS is used mainly for access in IP-based networks, for example the Internet.
EGPRS, EDGE (2.75G)
The Enhanced General Packet Radio Service (EGPRS) is an expansion of GPRS and is
also known as Enhanced Data Rates for GSM Evolution (EDGE). EGPRS uses a different
modulation technique (8-PSK) from GPRS that is more efficient. This means that a data rate
up to four times higher can be achieved with EGPRS.
UMTS (3G)
UMTS is the acronym for Universal Mobile Telecommunications System and is also known
as a mobile wireless standard of the third generation (3G). The maximum transmission rate
is 384 kbps. Video surveillance and prompt remote access to machines are relevant
applications of this technology in the industrial environment.
Industrial Ethernet
System Manual, 09/2019, C79000-G8976-C242-10
Basics of communication with Industrial Ethernet
1.6 Industrial Wireless Control
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