GSM Network Stucture

The network behind the GSM system seen by the customer is large and complicated in order to provide all of the services which are required. It is divided into a number of sections and these are each covered in separate articles.
the Base Station Subsystem (the base stations and their controllers).
the Network and Switching Subsystem (the part of the network most similar to a fixed network). This is sometimes also just called the core network.
the GPRS Core Network (the optional part which allows packet based Internet connections).
all of the elements in the system combine to produce many GSM services such as voice calls and SMS.

About Wi-Fi

A Wi-Fi enabled device such as a PC, game console, cell phone, MP3 player or PDA can connect to the Internet when within range of a wireless network connected to the Internet. The coverage of one or more interconnected access points — called a hotspot — can comprise an area as small as a single room with wireless-opaque walls or as large as many square miles covered by overlapping access points.
Wi-Fi, or Wireless Fidelity, is freedom. Freedom from wires, It allows you to connect to the Internet from just about anywhere - a coffee shop, a bed in a hotel room or a conference room at work without wires. And the best thing of all, it's super fast - almost 10 times faster than a regular dial-up connection.
Tata Indicom Wi-Fi – Experience the Best Apart from having the largest number of Wi-Fi hotspots in the country, Tata Indicom Wi-Fi also has the distinction of being the only member of the Wireless Broadband Alliance (WBA)- encompassing leaders in the telecommunications industry

SS7 Protocol Suite

For more information

http://www.protocols.com/pbook/ss7.htm

ABOUT GPRS

GPRS (general packet radio service) is used as a data services upgrade to any GSM network. It allows GSM networks to be truly compatible with the Internet. GPRS uses a packet-mode technique to transfer bursty traffic in an efficient manner. It allows transmission bit rates from 9.6 Kbps to more than 150 Kbps per user.
The two key benefits of GPRS are a better use of radio and network resources and completely transparent IP support. GPRS optimizes the use of network and radio resources. It uses radio resources only when there is data to be sent or received. As a true packet technology it allows end user applications to only occupy the network when a payload is being transferred, and so is well adapted to the very bursty nature of data applications. Another important feature of GPRS is that it provides immediate connectivity and high throughput.
Applications based on standard data protocols such as IP and X.25 are supported. In GPRS four different quality of service levels are supported. To support data applications GPRS utilizes several new network nodes in addition to the network nodes in the GSM PLMN. These nodes are responsible for traffic routing and other interworking functions with external packet-switched data networks, subscriber location, cell selection, roaming and many other functions that any cellular network needs for operation.

http://www.protocols.com/pbook/gprs.htm

WAP WIRELESS COMMUNICATION

WAP, Wireless Application Protocol aims to provide Internet content and advanced telephony services to digital mobile phones, pagers and other wireless terminals. The protocol family works across different wireless network environments and makes web pages visible on low-resolution and low-bandwidth devices. WAP phones are "smart phones" allowing their users to respond to e-mail, access computer databases and to empower the phone to interact with Internet-based content and e-mail.
WAP specifies a Wireless application Environment and Wireless Protocols. The Wireless application environment (WAE) is based on WSP (Wireless Session Protocol) and WTP (Wireless Transaction Protocol).
The OSI Model for Wireless Communication

The basic construction of WAP architecture can be explained using the following model. The order of the independent levels – which are a hierarchy - has the advantage that the system is very flexible and can be scaled up or down. Because of the different levels – or stacks - this is called the "WAP Stack", which is divided into 5 different levels.
Application Layer: Wireless Application Environment (WAE).
Session Layer: Wireless Session Protocol (WSP).
Transaction Layer: Wireless Transaction Protocol (WTP).
Security Layer: Wireless Transport Layer Security (WTLS).
Transport Layer: Wireless Datagram Protocol (WDP).
http://www.protocols.com/pbook/wap.htm

The WAP 2.0 conformance release

All specifications belonging to the WAP 2.0 release are listed below per functional area.
This page lists the latest WAP Forum conformance release, along with the specifications which are in an Approved state, but not yet included in a release. In addition, the page provides links to additional information on the specifications. The proposed and prototype specifications that were available here in the past have now been moved to a separate documents under review page. For more information about older releases, see below. Anyone can submit comments on WAP Forum specifications, see below for more information.

http://www.wapforum.org/what/technical.htm

WAP Push Quick Start (Tutorial)

Download the Openwave WAP Push Library DOWNLOAD the Openwave WAP Push Library (free of charge).
Install the WAP Push Library on Your PC Install the WAP Push Library by executing the download file: Openwave_WAP_Push_Java_1.0.jar
Create a Subscriber on the Openwave Developer Mobile Access Gateway (MAG) To receive pushed content, you need to create a subscriber account. Test subscribers provisioned on the Openwave Developer MAG receive pushed content via the same version of Openwave Push Proxy Gateway (PPG) deployed by network operators. Visit the Mobile Access Gateway Provisioning section of the Openwave Developer web site for instructions on how to sign-up for a developer provisioning account. When you sign-up, a test subscriber is automatically created for you. After you sign up, view your WAP subscriber and copy the Client ID (IP Address) and Subscriber ID values for future reference. You need the client ID to configure your phone simulator device settings (see step 5, below). You need the subscriber ID to specify the recipient of your pushed content (see step 8, on the next page of this guide).

To Download the WAP tutorial go here..
http://developer.openwave.com/dvl/support/documentation/guides_and_references/wap_push_quick_start/

WAP Specifications

Short for the Wireless Application Protocol, a secure specification that allows users to access information instantly via handheld wireless devices such as mobile phones, pagers, two-way radios, smartphones and communicators.
WAP supports most wireless networks. These include CDPD, CDMA, GSM, PDC, PHS, TDMA, FLEX, ReFLEX, iDEN, TETRA, DECT, DataTAC, and Mobitex.
WAP is supported by all operating systems. Ones specifically engineered for handheld devices include PalmOS, EPOC, Windows CE, FLEXOS, OS/9, and JavaOS.
WAPs that use displays and access the Internet run what are called microbrowsers--browsers with small file sizes that can accommodate the low memory constraints of handheld devices and the low-bandwidth constraints of a wireless-handheld network.
Although WAP supports HTML and XML, the WML language (an XML application) is specifically devised for small screens and one-hand navigation without a keyboard. WML is scalable from two-line text displays up through graphic screens found on items such as smart phones and communicators. WAP also supports WMLScript. It is similar to JavaScript, but makes minimal demands on memory and CPU power because it does not contain many of the unnecessary functions found in other scripting languages

For all the WAP specifcations click below..
http://www.openmobilealliance.org/tech/affiliates/wap/wapindex.html