21-03-2011, 02:31 PM
presented by:
P. Srikanth
GPRS - ppt.ppt (Size: 355.5 KB / Downloads: 122)
INTRODUCTION
The General Packet Radio Service (GPRS) is a new non-voice value added service that allows information to be sent and received across a mobile telephone network.
It supplements today's Circuit Switched Data and Short Message Service.
GPRS is NOT related to GPS (the Global Positioning System), a similar acronym that is often used in mobile contexts.
GPRS is a new service that provides actual packet radio access for Global System for Mobile Communications (GSM) and Time-Division Multiple Access (TDMA) users.
It provides for the transmission of IP packets over existing cellular networks, bringing the Internet to the mobile phone.
Anything the Internet offers, from web browsing to chat and email, will be available from GSM and TDMA service providers via GPRS-enabled devices.
The main benefits of GPRS are that it reserves radio resources only when there is data to send and it reduces reliance on traditional circuit - switched network elements.
The increased functionality of GPRS will decrease the incremental cost to provide data services, an occurrence that will, in turn, increase the penetration of data services among consumer and business users.
In addition to providing new services for today’s mobile user, GPRS is important as a migration step toward 3G networks.
GPRS is implemented over the existing GSM network.
ARCHITECTURE
GPRS Acronyms
SGSN – Serving GPRS Supporting Node
GGSN – Gateway GPRS Supporting Node
CGF – Charging Gateway Functionality
HLR – Home Location Register
PDN – Packet Data Network
PLMN – Public Land Mobile Network
The functions of a GGSN are below:
Routing mobile-destined packets coming from external networks to the relevant SGSN
Routing packets originating from a mobile to the correct external network
Interfaces to external IP networks and deals with security issues
Collects charging data and traffic statistics
Allocates dynamic or static IP addresses to mobiles either by itself or with the help of a DHCP or a RADIUS server
Involved in the establishment of tunnels with the SGSN and with other external networks and VPN.
SPEED:
This data overlay network provides packet data transport at rates from 9.6 to 171.2 kbps.
Additionally, multiple users can share the same air-interface resources.
How GPRS Works:
GPRS uses packet switching to transfer data from the mobile device to the network and back. This provides significant benefits.
Channels are shared in packet switched networks, but in circuit-switched networks each channel is dedicated to only one user.
The mobile device can begin sending packets immediately whenever it is used.
By overlaying the GSM network, GPRS is able to take advantage of the world's leading digital phone system, with a global subscriber base of over 646.5 million and growing (GSM Association, 01/02).
On a packet-switched network, a device can be always connected and ready to send information without monopolizing the data channel.
It operates on the 900 and 1800 MHz frequency bands in Europe and Asia Pacific and 1900 MHz in North America.
Users can have high quality voice conversations using circuit switched data up to 14.4 kbps and transfer data using packet switched GPRS at up to 53.6 kbps (85.6 kbps with advanced wireless networks).
TDMA-GPRS Physical Channel Capacity
The Time Division Multiple Access (TDMA) frame structure for GPRS.
GPRS provides flexible allocation of physical channels to GPRS service.
The GPRS traffic load in a given cell varies as a function of time.
APPLICATIONS
STILL IMAGES, MOVING IMAGES
INTERNET EMAIL, CORPORATE EMAIL
WEB BROWSING
VEHICLE POSITIONING
REMOTE LAN ACCESS
HOME AUTOMATION
DOCUMENT SHARING/ COLLABORATIVE WORKING
FILE TRANSFER
CONCLUSION
GSM is the most widely subscribed wireless network type worldwide, and GPRS is deployed on the GSM network, it appears that GPRS has the potential to become the most prevalent wireless data access technology. GPRS offers one of the most streamlined and logical progressions.
P. Srikanth
GPRS - ppt.ppt (Size: 355.5 KB / Downloads: 122)
INTRODUCTION
The General Packet Radio Service (GPRS) is a new non-voice value added service that allows information to be sent and received across a mobile telephone network.
It supplements today's Circuit Switched Data and Short Message Service.
GPRS is NOT related to GPS (the Global Positioning System), a similar acronym that is often used in mobile contexts.
GPRS is a new service that provides actual packet radio access for Global System for Mobile Communications (GSM) and Time-Division Multiple Access (TDMA) users.
It provides for the transmission of IP packets over existing cellular networks, bringing the Internet to the mobile phone.
Anything the Internet offers, from web browsing to chat and email, will be available from GSM and TDMA service providers via GPRS-enabled devices.
The main benefits of GPRS are that it reserves radio resources only when there is data to send and it reduces reliance on traditional circuit - switched network elements.
The increased functionality of GPRS will decrease the incremental cost to provide data services, an occurrence that will, in turn, increase the penetration of data services among consumer and business users.
In addition to providing new services for today’s mobile user, GPRS is important as a migration step toward 3G networks.
GPRS is implemented over the existing GSM network.
ARCHITECTURE
GPRS Acronyms
SGSN – Serving GPRS Supporting Node
GGSN – Gateway GPRS Supporting Node
CGF – Charging Gateway Functionality
HLR – Home Location Register
PDN – Packet Data Network
PLMN – Public Land Mobile Network
The functions of a GGSN are below:
Routing mobile-destined packets coming from external networks to the relevant SGSN
Routing packets originating from a mobile to the correct external network
Interfaces to external IP networks and deals with security issues
Collects charging data and traffic statistics
Allocates dynamic or static IP addresses to mobiles either by itself or with the help of a DHCP or a RADIUS server
Involved in the establishment of tunnels with the SGSN and with other external networks and VPN.
SPEED:
This data overlay network provides packet data transport at rates from 9.6 to 171.2 kbps.
Additionally, multiple users can share the same air-interface resources.
How GPRS Works:
GPRS uses packet switching to transfer data from the mobile device to the network and back. This provides significant benefits.
Channels are shared in packet switched networks, but in circuit-switched networks each channel is dedicated to only one user.
The mobile device can begin sending packets immediately whenever it is used.
By overlaying the GSM network, GPRS is able to take advantage of the world's leading digital phone system, with a global subscriber base of over 646.5 million and growing (GSM Association, 01/02).
On a packet-switched network, a device can be always connected and ready to send information without monopolizing the data channel.
It operates on the 900 and 1800 MHz frequency bands in Europe and Asia Pacific and 1900 MHz in North America.
Users can have high quality voice conversations using circuit switched data up to 14.4 kbps and transfer data using packet switched GPRS at up to 53.6 kbps (85.6 kbps with advanced wireless networks).
TDMA-GPRS Physical Channel Capacity
The Time Division Multiple Access (TDMA) frame structure for GPRS.
GPRS provides flexible allocation of physical channels to GPRS service.
The GPRS traffic load in a given cell varies as a function of time.
APPLICATIONS
STILL IMAGES, MOVING IMAGES
INTERNET EMAIL, CORPORATE EMAIL
WEB BROWSING
VEHICLE POSITIONING
REMOTE LAN ACCESS
HOME AUTOMATION
DOCUMENT SHARING/ COLLABORATIVE WORKING
FILE TRANSFER
CONCLUSION
GSM is the most widely subscribed wireless network type worldwide, and GPRS is deployed on the GSM network, it appears that GPRS has the potential to become the most prevalent wireless data access technology. GPRS offers one of the most streamlined and logical progressions.