07-07-2012, 10:55 AM
GENERAL PACKET RADIO SYSTEM
[attachment=27048]
Key Features:
The following three key features describe wireless packet data:
• The always online feature: Removes the dial-up process, making applications only one click away.
• An upgrade to existing systems: Operators do not have to replace their equipment; rather, GPRS is added on top of the existing infrastructure.
• An integral part of future 3G systems: GPRS is the packet data core network for 3G systems EDGE and WCDMA.
Goals of GPRS:
GPRS is the first step toward an end-to-end wireless infrastructure and has the following goals:
• Open architecture
• Consistent IP services
• Same infrastructure for different air interfaces
• Integrated telephony and Internet infrastructure
• Leverage industry investment in IP
• Service innovation independent of infrastructure
Benefits of GPRS:
• Higher Data Rate:
Users of GPRS benefit from shorter access times and higher data rates. In conventional GSM, the connection setup takes several seconds and rates for data transmission are restricted to 9.6 kbit/s. GPRS in practice offers session establishment times below one second and ISDN-like data rates up to several ten kbit/s.
• Easy Billing:
GPRS packet transmission offers a more user friendly billing than that offered by circuit switched services. In circuit switched services, billing is based on the duration of the connection. This is unsuitable for applications with bursty traffic. The user must pay for the entire airtime, even for idle periods when no packets are sent (e.g., when the user reads a Web page).
In contrast to this, with packet switched services, billing can be based on the amount of transmitted data. The advantage for the user is that he or she can be "online" over a long period of time but will be billed based on the transmitted data volume.
GPRS APPLICATION:
GPRS enables a variety of new and unique services to the mobile wireless subscriber. These mobile services have unique characteristics that provide enhanced value to customers. These characteristics include the following:
• Mobility: The ability to maintain constant voice and data communications while on the move
• Immediacy Allows subscribers to obtain connectivity when needed, regardless of location and without a lengthy login session.
• Localization Allows subscribers to obtain information relevant to their current location.
The combination of these characteristics provides a wide spectrum of possible applications that can be offered to mobile subscribers. In general, applications can be separated into two high-level categories: corporate and consumer. These include:
• Communications: E-mail, fax, unified messaging and intranet/Internet access etc.
• Value-added services: Information services and games etc.
• E-commerce: Retail, ticket purchasing, banking and financial trading etc.
• Location-based applications: Navigation, traffic conditions, airline/rail schedules and location finder etc.
• Vertical applications: Freight delivery, fleet management and sales-force automation.
• Advertising: Advertising may be location sensitive. For example, a user entering a mall can receive advertisements specific to the stores in that mall.
It is also possible to send SMS messages over GPRS. In addition, it is planned to implement supplementary services, such as call forwarding unconditional (CFU), call forwarding on mobile subscriber not reachable (CFNRc), and closed user group (CUG).
ARCHITECTURE
GPRS is a data network that overlays a second-generation GSM network. This data overlay network provides packet data transport at rates from 9.6 to 171 kbps. Additionally, multiple users can share the same air-interface resources simultaneously.
GPRS attempts to reuse the existing GSM network elements as much as possible, but to effectively build a packet-based mobile cellular network, some new network elements, interfaces, and protocols for handling packet traffic are required.
[attachment=27048]
Key Features:
The following three key features describe wireless packet data:
• The always online feature: Removes the dial-up process, making applications only one click away.
• An upgrade to existing systems: Operators do not have to replace their equipment; rather, GPRS is added on top of the existing infrastructure.
• An integral part of future 3G systems: GPRS is the packet data core network for 3G systems EDGE and WCDMA.
Goals of GPRS:
GPRS is the first step toward an end-to-end wireless infrastructure and has the following goals:
• Open architecture
• Consistent IP services
• Same infrastructure for different air interfaces
• Integrated telephony and Internet infrastructure
• Leverage industry investment in IP
• Service innovation independent of infrastructure
Benefits of GPRS:
• Higher Data Rate:
Users of GPRS benefit from shorter access times and higher data rates. In conventional GSM, the connection setup takes several seconds and rates for data transmission are restricted to 9.6 kbit/s. GPRS in practice offers session establishment times below one second and ISDN-like data rates up to several ten kbit/s.
• Easy Billing:
GPRS packet transmission offers a more user friendly billing than that offered by circuit switched services. In circuit switched services, billing is based on the duration of the connection. This is unsuitable for applications with bursty traffic. The user must pay for the entire airtime, even for idle periods when no packets are sent (e.g., when the user reads a Web page).
In contrast to this, with packet switched services, billing can be based on the amount of transmitted data. The advantage for the user is that he or she can be "online" over a long period of time but will be billed based on the transmitted data volume.
GPRS APPLICATION:
GPRS enables a variety of new and unique services to the mobile wireless subscriber. These mobile services have unique characteristics that provide enhanced value to customers. These characteristics include the following:
• Mobility: The ability to maintain constant voice and data communications while on the move
• Immediacy Allows subscribers to obtain connectivity when needed, regardless of location and without a lengthy login session.
• Localization Allows subscribers to obtain information relevant to their current location.
The combination of these characteristics provides a wide spectrum of possible applications that can be offered to mobile subscribers. In general, applications can be separated into two high-level categories: corporate and consumer. These include:
• Communications: E-mail, fax, unified messaging and intranet/Internet access etc.
• Value-added services: Information services and games etc.
• E-commerce: Retail, ticket purchasing, banking and financial trading etc.
• Location-based applications: Navigation, traffic conditions, airline/rail schedules and location finder etc.
• Vertical applications: Freight delivery, fleet management and sales-force automation.
• Advertising: Advertising may be location sensitive. For example, a user entering a mall can receive advertisements specific to the stores in that mall.
It is also possible to send SMS messages over GPRS. In addition, it is planned to implement supplementary services, such as call forwarding unconditional (CFU), call forwarding on mobile subscriber not reachable (CFNRc), and closed user group (CUG).
ARCHITECTURE
GPRS is a data network that overlays a second-generation GSM network. This data overlay network provides packet data transport at rates from 9.6 to 171 kbps. Additionally, multiple users can share the same air-interface resources simultaneously.
GPRS attempts to reuse the existing GSM network elements as much as possible, but to effectively build a packet-based mobile cellular network, some new network elements, interfaces, and protocols for handling packet traffic are required.