30-03-2010, 07:44 PM
MIGRATION FROM GSM NETWORK TO GPRS
Presented by:
JOHN RONALD ANDREW
What is GSM
(Global system for mobile )
GSM is a second generation cellular system standard developed to solve the fragmentation problems.
GSM is the only technology that supports the SENDING of SMS from the handset.
GSM is combination of TDMA (for transmitting signals) and FDMA techniques.
More capacity, ensuring rapid call set-up.
Handsets also smaller and more robust.
What is GPRS
(General Packet Radio Service)
GPRS is a packet oriented mobile data service available to users of the 2G cellular communication systems GSM, as well as in the 3G systems.
GPRS system is used by GSM mobile phones, for transmitting IP packets.
The GPRS core network provides mobility management, session management and transport for IP packet services in GSM and WCDMA networks.
GPRS involves overlaying a packet based air interface on the existing circuit switched GSM network.
Why migration from GSM network to GPRS
GPRS uses additional nodes and interfaces to implement packet switching. Where existing protocols were enhanced for higher data rates and preventing higher error rates.
GPRS defines two new network nodes (SGSN & GGSN) for packet switching. SGSN communicates between mobile network and GPRS network. And GGSN communicates between outside data network and GPRS network. Where as GSM provides only circuit-switched services.
The GPRS protocol stack provides transmission of user data and its associated signaling such as flow control and error detection.
Features of GPRS:
IMMEDIACY : GPRS facilitates instant connections whereby information can be sent or received immediately as the need arises. “ALWAYS CONNECTED.
SPEED :GPRS theoretical maximum speed is about three times as fast as todayâ„¢s fixed telecommunications networks and ten times as fast as current Circuit Switched Data services on GSM networks.
PACKET SWITCHING: With GPRS, the information is split into separate but related "packets" before being transmitted and reassembled at the receiving end.
INTERNET AWARE: GPRS network allows any service that is used over the fixed Internet today- File Transfer Protocol (FTP), web browsing, chat, email, telnet- will be as available over the mobile network because of GPRS.
Features of GPRS¦ cont
SPECTRUM EFFICIENCY: With packet switching, GPRS radio resources are used only when users are actually sending or receiving data.
NEW APPLICATIONS, BETTER APPLICATIONS: GPRS facilitates several new applications that have not previously been available over GSM networks like the file transfer, home automation, Job Dispatch, Web Browsing, Chat and many more...
SUPPORTS TDMA AND GSM: GPRS is not only a service designed to be deployed on mobile networks that are based on the GSM digital mobile phone standard but is also supported by TDMA.
The 3 GPRS terminals classes:
A Class A terminal supports GPRS and other GSM services (such as SMS and voice) simultaneously which supports simultaneous attach, activation, monitor, and traffic.
A Class B terminal can monitor GSM and GPRS channels simultaneously, but can support only one of these services at a time. Therefore, a Class B terminal can support simultaneous attach, activation, and monitor, but not simultaneous traffic.
A Class C terminal supports only non-simultaneous attach. Therefore, a Class C terminal can make or receive calls from only the manually (or default) selected service.
GPRS ARCHITECTURE
GPRS ARCHITECTURE¦ cont
New terminals (TEs) are required because existing GSM phones do not handle the enhanced air interface, nor do they have the ability to packetize traffic directly.
GPRS defines two new network nodes (SGSN & GGSN) for packet switching. SGSN communicates between mobile network and GPRS network. And GGSN communicates between outside data network and GPRS network.
GPRS APPLICATIONS:
Web Browsing: Circuit Switched Data for web browsing has never been an enduring application for mobile users. Because of its slow speed. Hence mobile Internet browsing is better suited to GPRS.
Document Sharing/Collaborative Working: Mobile data facilitates document sharing and remote collaborative working which lets different people in different places work on the same document at the same time.
Job Dispatch: GPRS non-voice mobile services can be used to assign and communicate new jobs from office-based staff to mobile field staff.
Remote LAN Access: Remote LAN applications encompasses access to any applications that an employee would use when sitting at their desk.
GPRS APPLICATIONS:
¦cont
File Transfer: The GPRS file transfer applications encompass any form of downloading sizeable data across the mobile network.
Vehicle Positioning: This application integrates satellite positioning systems that tell people where they are with non-voice mobile services that let people tell others where they are.
Textural and Visual Information: A wide range of content can be delivered to mobile phone users ranging from share prices, sports scores to horoscopes etc.
Corporate Email: With up to half of employees typically away from their desks at any one time, its important for them to keep in touch with the office by extending the use of corporate email systems beyond an employee's office PC.
GPRS Limitations:
Limited Cell Capacity for All Users: There are only limited radio resources that can be deployed for different uses - use for one purpose precludes simultaneous use for another.
Speeds Much Lower in Reality: Achieving the theoretical maximum GPRS data transmission speed of 172.2 kbps would require a single user taking over all eight timeslots without any error protection.
Transit Delays: GPRS packets are sent in all different directions to reach the same destination which may cause one or some of those packets to be lost or corrupted during the data transmission over the radio link.
No Store and Forward: The Store and Forward Engine in the Short Message Service is the heart of the SMS Center and key feature of the SMS service but this storage mechanism is not incorporated into the GPRS standard.
CONCLUSION:
GPRS is a new service that provides actual packet radio access for GSM and TDMA users.
GPRS will provide a massive boost to mobile data usage and usefulness.
The only question is how soon it takes off in earnest and how to ensure that the technical and commercial features do not hinder its widespread use.
BIBLIOGRAPHY:
G. Brasche and B. Walke. Concepts, services, and protocols of the new GSM phase 2+ General Packet Radio Service, IEEE Communications Magazine, Vol 35, August 1999. pp 94-104.
J. Cai and D. Goodman. General packet radio service in GSM, IEEE Communications Magazine, Vol 37:, October 1999. pp 122-131.
Dr.Kamilofeher, Wireless Digital communication, Prentice Hall of India, 4th edition, May 2002, pp 102-108.
WWW.GSMWORLD.COM
Presented by:
JOHN RONALD ANDREW
What is GSM
(Global system for mobile )
GSM is a second generation cellular system standard developed to solve the fragmentation problems.
GSM is the only technology that supports the SENDING of SMS from the handset.
GSM is combination of TDMA (for transmitting signals) and FDMA techniques.
More capacity, ensuring rapid call set-up.
Handsets also smaller and more robust.
What is GPRS
(General Packet Radio Service)
GPRS is a packet oriented mobile data service available to users of the 2G cellular communication systems GSM, as well as in the 3G systems.
GPRS system is used by GSM mobile phones, for transmitting IP packets.
The GPRS core network provides mobility management, session management and transport for IP packet services in GSM and WCDMA networks.
GPRS involves overlaying a packet based air interface on the existing circuit switched GSM network.
Why migration from GSM network to GPRS
GPRS uses additional nodes and interfaces to implement packet switching. Where existing protocols were enhanced for higher data rates and preventing higher error rates.
GPRS defines two new network nodes (SGSN & GGSN) for packet switching. SGSN communicates between mobile network and GPRS network. And GGSN communicates between outside data network and GPRS network. Where as GSM provides only circuit-switched services.
The GPRS protocol stack provides transmission of user data and its associated signaling such as flow control and error detection.
Features of GPRS:
IMMEDIACY : GPRS facilitates instant connections whereby information can be sent or received immediately as the need arises. “ALWAYS CONNECTED.
SPEED :GPRS theoretical maximum speed is about three times as fast as todayâ„¢s fixed telecommunications networks and ten times as fast as current Circuit Switched Data services on GSM networks.
PACKET SWITCHING: With GPRS, the information is split into separate but related "packets" before being transmitted and reassembled at the receiving end.
INTERNET AWARE: GPRS network allows any service that is used over the fixed Internet today- File Transfer Protocol (FTP), web browsing, chat, email, telnet- will be as available over the mobile network because of GPRS.
Features of GPRS¦ cont
SPECTRUM EFFICIENCY: With packet switching, GPRS radio resources are used only when users are actually sending or receiving data.
NEW APPLICATIONS, BETTER APPLICATIONS: GPRS facilitates several new applications that have not previously been available over GSM networks like the file transfer, home automation, Job Dispatch, Web Browsing, Chat and many more...
SUPPORTS TDMA AND GSM: GPRS is not only a service designed to be deployed on mobile networks that are based on the GSM digital mobile phone standard but is also supported by TDMA.
The 3 GPRS terminals classes:
A Class A terminal supports GPRS and other GSM services (such as SMS and voice) simultaneously which supports simultaneous attach, activation, monitor, and traffic.
A Class B terminal can monitor GSM and GPRS channels simultaneously, but can support only one of these services at a time. Therefore, a Class B terminal can support simultaneous attach, activation, and monitor, but not simultaneous traffic.
A Class C terminal supports only non-simultaneous attach. Therefore, a Class C terminal can make or receive calls from only the manually (or default) selected service.
GPRS ARCHITECTURE
GPRS ARCHITECTURE¦ cont
New terminals (TEs) are required because existing GSM phones do not handle the enhanced air interface, nor do they have the ability to packetize traffic directly.
GPRS defines two new network nodes (SGSN & GGSN) for packet switching. SGSN communicates between mobile network and GPRS network. And GGSN communicates between outside data network and GPRS network.
GPRS APPLICATIONS:
Web Browsing: Circuit Switched Data for web browsing has never been an enduring application for mobile users. Because of its slow speed. Hence mobile Internet browsing is better suited to GPRS.
Document Sharing/Collaborative Working: Mobile data facilitates document sharing and remote collaborative working which lets different people in different places work on the same document at the same time.
Job Dispatch: GPRS non-voice mobile services can be used to assign and communicate new jobs from office-based staff to mobile field staff.
Remote LAN Access: Remote LAN applications encompasses access to any applications that an employee would use when sitting at their desk.
GPRS APPLICATIONS:
¦cont
File Transfer: The GPRS file transfer applications encompass any form of downloading sizeable data across the mobile network.
Vehicle Positioning: This application integrates satellite positioning systems that tell people where they are with non-voice mobile services that let people tell others where they are.
Textural and Visual Information: A wide range of content can be delivered to mobile phone users ranging from share prices, sports scores to horoscopes etc.
Corporate Email: With up to half of employees typically away from their desks at any one time, its important for them to keep in touch with the office by extending the use of corporate email systems beyond an employee's office PC.
GPRS Limitations:
Limited Cell Capacity for All Users: There are only limited radio resources that can be deployed for different uses - use for one purpose precludes simultaneous use for another.
Speeds Much Lower in Reality: Achieving the theoretical maximum GPRS data transmission speed of 172.2 kbps would require a single user taking over all eight timeslots without any error protection.
Transit Delays: GPRS packets are sent in all different directions to reach the same destination which may cause one or some of those packets to be lost or corrupted during the data transmission over the radio link.
No Store and Forward: The Store and Forward Engine in the Short Message Service is the heart of the SMS Center and key feature of the SMS service but this storage mechanism is not incorporated into the GPRS standard.
CONCLUSION:
GPRS is a new service that provides actual packet radio access for GSM and TDMA users.
GPRS will provide a massive boost to mobile data usage and usefulness.
The only question is how soon it takes off in earnest and how to ensure that the technical and commercial features do not hinder its widespread use.
BIBLIOGRAPHY:
G. Brasche and B. Walke. Concepts, services, and protocols of the new GSM phase 2+ General Packet Radio Service, IEEE Communications Magazine, Vol 35, August 1999. pp 94-104.
J. Cai and D. Goodman. General packet radio service in GSM, IEEE Communications Magazine, Vol 37:, October 1999. pp 122-131.
Dr.Kamilofeher, Wireless Digital communication, Prentice Hall of India, 4th edition, May 2002, pp 102-108.
WWW.GSMWORLD.COM