Tecnologia y aplicacion de GPRS IIOT INDUSTRIAL

eee264_4.ppt

1. 1
2.5 G Cellular Systems and Architecture

2. 2
2.5G Cellular System
•Introduction to GPRS and EDGE
•2.5G System Architecture

3. 3
Evolution of Wireless

4. GPRS
•General Packet Radio Service
•Value added service to 2G to connect users
to IP (Internet Protocol) -based data
networks
•Forms basis of Packet Switched Network
•Data rate up to 115 Kbps with GPRS and
384 Kbps with EDGE
4

5. Motivation for GPRS
•Wireless access to internet and intranet
5

6. Circuit and Packet Switching
•Circuit Switching
oDedicated resources to each user
oHigher performance and higher cost
•Packet Switching
oShares resources with multiple users
oLower performance and lower cost
oRequires MAC (Medium Access Control)
oRequires memory buffering
6

7. Circuit Switching Network
7

8. Packet Switching Network
8

9. EDGE
9
•Enhanced Data rate for Global Evolution
•Also called as Enhanced GPRS or EGPRS
•Improves efficiency of GPRS by use of
advanced modulation technique-Octal PSK
or 8 PSK Modulation

10. GPRS Network
10

11. GPRS Network Terms
11

12. Major functions of SGSN
12
•Provides Packet Switching and routing for
GPRS services-analogous to MSC in 2G
•Contains a database of subscribers,
including visitors (roamers) and home
subscribers-analogous to VLR in 2G
•Handles authentication and admission
control –analogous to MSC/HLR/AuC

13. Major functions of GGSN
13
•Provides Packet Switching and Routing for
GPRS services
•Provides interface to external Public Data
Networks (PDNs) e.g. the Internet
•First point of contact for packet session
originating outside the PLMN

14. Major functions of GERAN
14
•Handles admission control
•Handles radio resource management
•Performs packet relay and routing functions

15. 15
Elements of Communication SystemSource Transmitter Receiver
Destination/
Transdcers
Transmission
Channel
Noise,
interference
and distortion

16. 16
Typical Wireless TerminalUser
Interface
Digital
Baseband
Analog-Digital
Interface
(Analog
Baseband)
RF Front-end

17. 17
Typical 2.5G Wireless TerminalGSM/GPRS
RF solution
13MHz
Control
Baseband
Port
Aux.
Port
Voiceband
Port
AFE
GPRS
mixed
signal
solution
Audio I/FAux PinsJTAG
Rx Data
Tx Data
SPI
T/R SwitchGSM/
GPRS
Digital
Baseband
PA Control
Band
TX VCO
MAIN
VCO
TX
RX
PA
RF Filter
Control
Control
Control
Ramp ControlRamp Control
LPF
13MHz
VCTCXO
RFCLK
(13MHz)
Synthesizer
Control
SPI
Control
SPI
PMIC
VccABB
I
2
C
Vcc TXVcc Synth
Vcc
VCTCXOVcc RXVcc ABB
Vcc
Manitoba
Vcc Synth
Vcc Synth
Vcc TXVcc RX
Vcc TX
Vcc TX
Vcc TX
Vcc
VCTCXO
Vcc
Manitoba
VCXO_ON