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List bearer services provided in GPRS and describe each of them.

Subject: Mobile Computing

Difficulty: Medium

Marks: 8 Marks

Wide range of corporate and consumer applications are enable by GPRS services. GPRS Service include all normal GSM services but in more efficient way. It also support services like

• Email
• Web browsing
• Enhanced short message
• Wireless imaging with instant picture
• Video service
• Document and information sharing

A user is likely to use either of the two modes of the GPRS network.

These are

1. Application mode

2. Tunneling mode

1.Application Mode:

• In this mode the user will be using the GPRS mobile phone to access the application running on the phone itself.
• The phone here acts as the end user devices.
• All GPRS phone have web browser as embedded application.
• This browser allows browsing of web sites.
• Some GPRS device support mobile execution environment.

2. Tunneling Mode:

• This mode is for mobile computing where the user will use the GPRS interface as an access to the network.
• The end user device will be a large footprint device like laptop computer or small foot print device like PDA .
• The MS will be connected to the device and used as a modem to access the wireless data network.

DATA SERVICES

GPRS Bearer Services: GPRS is a wireless extension of data networks. It can access to data networks, such as IP-based networks (public internet, private intranet, IPv4 and IPv6 protocols) and X.25 based networks.

GPRS upgrades GSM data services and provides the following services:

1. Point-to-point (PTP) service: internet working with the Internet (IP protocols)and X.25 networks.

2. Point-to-multipoint (PTM) service: point-to-multipoint multicast and point-to-multipoint group calls.

3. SMS service: bearer for SMS

4. Anonymous service: anonymous access to predefined services

5. Future enhancements: flexible to add new functions, such as more capacity, moreusers, new accesses, new protocols, new radio networks.