FORM-2
THE PATENTS ACT, 1970
(39 of 1970)
& THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
(See section 10 and rule 13)
A SYSTEM FOR HYBRID TELECOMMUNICATION
TATA CONSULTANCY SERVICES LTD.,
an Indian Company
of Nirmal Building, 9th Floor, Nariman Point, Mumbai 400 021,
Maharashtra, India
The following specification particularly describes the invention and the manner in which it is to be performed.

FIELD OF THE INVENTION
This invention relates to the field of telecommunications.
Particularly, the invention relates to data communication on wireless carriers.
DEFINITIONS OF TERMS USED IN THE SPECIFICATION
Mobile Devices - Mobile devices include any device, gadget, equipment or instrument which can communicate with other similar devices using any wireless communication medium including GSM, CDMA, OFDM, WiMax and the like. For instance these devices can be mobile phones, iPODs, PDAs, iPhones, pagers and the like.
Wireless Network - Wireless network includes any wireless communication medium through which users' mobile devices are communicating.
Request Signal - Request signal is the signal containing temporary
information pertaining to the operations to be performed on the internet. For instance the request signal may contain cookies, session variable, and temporary information.

Data Signal - Data signal is the signal containing data, this data can be live text in internet relay chatting, or images, or videos, other interactive form information and the like.
These definitions are in addition to those expressed in the art.
BACKGROUND OF THE INVENTION
Congestion is the major problem today faced by most of the wireless telecommunications service providers, this congestion is mostly caused because of data calls which are made using GPRS services provided by the cellular networks. With growing number of mobile phone (hand sets and ISU do offer such facility to improve net communication on mobile) users availing these services, this problem is expected to rise enormously.
It has been observed that during peak hours i.e office hours and evening hours both voice calls and SMS calls are made in large numbers and also with a large amount of data traveling through these cellular or mobile networks often leads to disturbance, cross talk, co-channel and inter channel interference, and in severe cases network site break down.
Such problems of network congestion are amplified in areas where high density of people are visiting on a daily basis like offices, organizations, institutions, corporate offices and the like.
To over come the problems of congestion in the network several approaches have been tried before like frequency reuse. This approach lets the

communication channel to be reused frequently in order to prevent or reduce congestion to some extent. However, this technique has several de-merits such as frequencies or channels can be reused outside the range of cells or certain predetermined distance from current cell site and in case of multiple congestion location during peak hours it becomes difficult, complex and costly to deploy frequency reuse.
Also, various algorithms have been proposed before, for controlling congestion of cellular wireless networks by prioritizing, de prioritizing the users request and queuing the requests. But, these algorithms are only defined for specific situations and the random nature of congestion of mobile wireless network is not taken into consideration by these algorithms.
Some systems have also been tried before such as United states patent application 20030179720 discloses a wireless telecommunication system comprising a packet switched network for sending and receiving data traffic between a mobile terminal and a data packet sender wherein the system comprises a plurality of uplink buffers and downlink buffers wherein each uplink and downlink buffer pair is associated with a specific communication channel for use by the mobile terminal, said system being characterized in that the system includes means for controlling excessive congestion of packets accumulating in said buffers in a network element between the sender and the receiver terminals during a data transfer.
This approach has many disadvantages such as providing multiple buffers for multiple channels adds to cost and complexity of the system; in case of heavy load condition users will still disturbances, distortions and the like

because of congestion. Also, separate modules solutions have to be provided for controlling congestion in the buffers.
The next major issue is wireless transmitter power to address the reach of ISU mobile clients and power enhancements at the tower as the transmitting wavelength becomes sharper and sharper. This effect gets compounded as the clients make more and more of Data calls from their mobile handsets.
One more disadvantage of above approach is that it requires a substantial change in the present mobile wireless network infrastructure and hence, is time consuming and costly affair.
Hence, there is felt a need
■ to prevent congestion due to data calls in wireless telecommunication network;
■ of a robust system to prevent congestion which is compatible with present wireless infrastructure;
■ of a system which is easy to deploy and is cost effective; and
■ of a parallel platform for handling data call traffic.
■ lastly to reduce power at transmitting and receiving tower to improve on the GREEN environment.
OBJECTS OF THE INVENTION
An object of the present invention is to provide a system which can prevent congestion due to data calls in wireless telecommunication network.

Another object of the present invention is to provide a robust system to prevent congestion which is csent invention is to provide a system which is easy to deploy and is cost effective;ompatible with present wireless infrastructure.
Yet another object of the pre
Still another object of the present invention is to provide a space effective and time effective system;
Still further object of the present invention is to provide a parallel platform for handling data call traffic; and
One more object of the present invention is to provide high speed internet connectivity to users during travel.
An additional object of the present invention is to reduce power at tower and enable the use of low power transceiver.
SUMMARY OF THE INVENTION
The present invention envisages a hybrid telecommunication system for providing data, the system comprising:
■ mobile devices adapted to send request signals seeking data and receive signals containing data;

■ first wireless network adapted to receive the request signals from the devices;
■ wired network adapted to co-operate with the first wireless network to send the request signals to a web server;
■ second wireless network adapted to co-operate with the web server to transmit data signals containing, said data corresponding to the request signals, to the mobile devices;
the system further comprising
■ a base station server co-operating with the first wireless network adapted to receive the request signals;
■ a hybrid server adapted to receive the request signals from the base station server and to transmit the signals to the web server using the wired network;
■ load sensing means co-operating with the base station server adapted to sense the density of to and fro request and data signals between base station server and the mobile devices;
■ switching means co-operating with the load sensing means adapted to divert at least a portion of the request signals to the hybrid server in the event that the density of signals exceeds a set threshold; and
■ transmitting server co-operating with the second wireless network adapted to transmit signals containing data to the mobile devices.

Typically, the request signals are data call requests for downloading content from the internet using GPRS, EDGE, WiMax services supported by mobile networks,
Typically, the request signals contain cookies pertaining to the user initiated operation.
Typically, the data signals contain data corresponding to the execution of cookies in the request signals.
The system includes a conversion means co-operating with the hybrid server and adapted to extract information from the request signals and convert it into signals compatible with the standard web format.
The system also includes a framing means co-operating with the hybrid server and adapted to frame mobile device compatible packets of the data received from the web server.
Typically, the switching means includes notification means co-operating with the base station server adapted to notify users' of mobile devices about the diversion of signals containing cookies to the hybrid server.
Typically, the wired network is a network at least partially formed of optical fibers.
In accordance with another aspect of the present invention a method of providing data on to mobile devices using a hybrid telecommunication system is provided, the method comprising following steps:

■ sending request signals in the form of packets using the first wireless network,
■ receiving the request signals;
■ sensing the density of signals between the mobile devices and the base station server;
■ diverting at least a portion of the request signals on to a wired network, in case the density of the signals exceeds a set threshold;
■ sending the request signals to a web server using the wired network; and
■ transmitting data signals corresponding to the request signals, to the devices using a second wireless network.
Typically, the method includes the step of extracting information from the request signals and converting it into signals compatible with the standard web format.
Typically, the method includes the step of framing mobile device compatible packets of the data received from the web server.
Typically, the method includes the step of notifying users of mobile devices about the diversion of signals containing cookies to the hybrid server.

BRIEF DESCRIPTION OF ACCOMPANYING DRAWINGS
The invention will now be described with the help of accompanying drawings, in which:
Figure 1 illustrates the schematic diagram of a hybrid telecommunication system for providing data, in accordance with the present invention; and
Figure 2 illustrates a flow chart of a method for providing data using hybrid telecommunication system, in accordance with the present invention.
DETAILED DESCRIPTION OF THE INVENTION
The invention will now be described with reference to the accompanying drawings which do not limit the scope and ambit of the invention. The description provided is purely by way of example and illustration.
To overcome the problem of excessive information traffic and loads on the wireless mobile service networks because of increasing usage of smart mobile devices for making data calls and downloading purposes using general packet radio service (GPRS), the present invention provides a system which diverts the traffic because of GPRS data calls on a parallel convergence path which uses a wired line network for processing these data call requests. The invention recognizes the fact of Semi Stationary cluster of clients in urban society, viz, Office Complexes, residential annexes etc with in the reach low power transceivers.

The wired line network is basically an optical network consisting of high speed and high data rate optical fibers with data rates of 2GBPS and hence use of this network provides very high speed internet connectivity even during travel.
Referring to figure 1 there is shown a hybrid telecommunication system 100 for providing data on user's mobile devices which reduces the load on wireless carrier network which can then be used to carry voice signals for a large number of users, in case of this wireless network also carrying data on the voice channels would have made the network more bulky.
In accordance with the invention the user initiates a data call using his/her GPRS enabled mobile device. The mobile device then sends the request signals which further contain the cookies or the temporary files or session variables which contain information about the user initiated operation on the mobile device, for instance the cookies may contain the information for downloading an image from a website. Another instance can be considered of a user who uses the micro-browser embedded within the mobile device or some WAP application for live chatting or listening to music.
In accordance with the invention these cookies are sent along with the request signals in the form of packets. The packets may be variable in size and contain the bit level information of the cookies. It should be well understood to the persons skilled in the art that these signals or the packets may be modulated and / or multiplexed and / or encoded using known techniques or can contain such modulated and / or multiplexed and / or encoded information.

These signals containing cookies are sent to a base station 105 using a first wireless network (standard mobile network) generally referred by reference numeral 170 using services like GPRS, WiMax, EDGE.
In accordance with the invention a response to these cookies is provided on the user's mobile device after processing these cookies using the web server 120, for instance the response can be the image downloaded on to user's mobile device for which he/she requested or the text or voice or video entered at the other end of the live chatting connection.
Further, load sensing means 165 co-operating with a switching means decides whether to switch this particular request signal on to a hybrid server 115 or not, this decision is taken on the basis of certain pre-determined parameters, for instance these pre-determined parameters can be the threshold limit of overall density of to and fro signals, peak hours, expected calls in next few hours, link failure and the like.
In case the load sensing means 165 decides to switch the request signals carrying cookies on to the hybrid server 115, it triggers a switching means 110 which diverts the request signals to the hybrid server 115. Also, the switching means 110 terminates the standard GPRS connection which would have otherwise been used for communication between the user's mobile device and the web server 120, the terminated GPRS connection is illustrated by the dotted line between switching means 110 and the web server 120. This approach helps in preventing excessive usage of normal GPRS connection using standard wireless network in the to and fro

communication in the request and delivery of data which is then used to carry less bulky voice data instead of heavy data traffic.
Hybrid server 115 co-operates with a conversion means 160 which is adapted to extract the user initiated data from the cookies contained in the request signals and convert them into a format compatible with the web standards (for instance web cookies) and sends this to web server 120 for final processing which is connected to the internet, and the web server 120 then executes or processes this converted information in order to fulfill user's need. Further, the web server 120 sends the data corresponding to the converted incoming signals after processing and is received by the hybrid server 115 which again sends it to a framing means 125 which is adapted to convert the data into mobile device compatible format (the packets of data) and the mobile device compatible data is then sent to the transmitting server 130 which sends the data signals (signals containing the data) using a second wireless network 175 to said mobile devices.
This communication between switching means 110 and hybrid server 115 and the communication between hybrid server 115 and web server 120 is done using optical networks 150a and 150b respectively like Synchronous Optical Networking (SONET) or Synchronous Digital Hierarchy (SDH) (these are preferably dedicated for data call requests). The data in bits to be communicated to a particular user may be multiplex together with other signals. These multiplex signals are then converted into light signals (using LED or lasers) and sent to the destination using optical fibers which allows transmission of these signals at the speed of light (or near to speed of light considering the attenuation and losses).

In accordance with another embodiment of the present invention there is provided a method of providing data on to mobile devices using a hybrid telecommunication system, the method comprising following steps:
■ sending request signals in the form of packets using the first wireless network, 2002;
■ receiving the request signals, 2004;
■ sensing the density of signals between the mobile devices and the base station server, 2006;
■ diverting at least a portion of the request signals on to a wired network, in case the density of the signals exceeds a set threshold, 2008;
■ sending the request signals to a web server using the wired network, 2010; and
■ transmitting data signals corresponding to the request signals, to the devices using a second wireless network, 2012.
The method also includes the step of extracting information from the request signals and converting it into signals compatible with the standard web format.
The method also includes the step of framing mobile device compatible packets of the data received from the web server.
The method also includes the step of notifying users of mobile devices about the diversion of signals containing cookies to the hybrid server.

TECHNICAL ADVANCEMENTS
The technical advancements offered by the present invention include the realization of:
■ a system which can prevent congestion due to data calls in wireless telecommunication network.
■ a robust system to prevent congestion which is compatible with present wireless infrastructure.
■ a system which is easy to deploy and is cost effective;
■ a space effective and time effective system;
■ a parallel platform for handling data call traffic; and
■ a system providing users high speed internet connectivity during travel.
While considerable emphasis has been placed herein on the particular features of this invention, it will be appreciated that various modifications can be made, and that many changes can be made in the preferred embodiment without departing from the principles of the invention. These

and other modifications in the nature of the invention or the preferred embodiments will be apparent to those skilled in the art from the disclosure herein, whereby it is to be distinctly understood that the foregoing descriptive matter is to be interpreted merely as illustrative of the invention and not as a limitation.

WE CLAIM
1. A hybrid telecommunication system for providing data, said system comprising:
■ mobile devices adapted to send request signals seeking data and receive signals containing data;
■ first wireless network adapted to receive said request signals from said devices;
■ wired network adapted to co-operate with the first wireless network to send said request signals to a web server;
■ second wireless network adapted to co-operate with the web server to transmit data signals containing data, said data corresponding to the request signals, to said mobile devices;
said system further comprising
■ a base station server co-operating with the first wireless network adapted to receive said request signals;
■ a hybrid server adapted to receive said request signals from the base station server and to transmit said signals to the web server using said wired network;
■ load sensing means co-operating with the base station server adapted to sense the density of to and fro request and data signals between base station server and the mobile devices;
■ switching means co-operating with the load sensing means adapted to divert at least a portion of said request signals to the

hybrid server in the event that said density of signals exceeds a set threshold; and ■ transmitting server co-operating with the second wireless network adapted to transmit signals containing, said data to said mobile devices.
2. The system as claimed in claim 1, wherein said request signals are data call requests for downloading content from the internet using GPRS, EDGE, WiMax services supported by mobile networks.
3. The system as claimed in claim 1, wherein said request signals contain cookies pertaining to the user initiated operation.
4. The system as claimed in claim 1, wherein said data signals contain data corresponding to the execution of cookies in said request signals.
5. The system as claimed in claim 1, wherein said system includes a conversion means co-operating with said hybrid server and adapted to extract information from the request signals and convert it into signals compatible with the standard web format.
6. The system as claimed in claim 1, wherein said system includes a framing means co-operating with said hybrid server and adapted to frame mobile device compatible packets of the data received from the web server.
7. The system as claimed in claim 1, wherein said switching means includes notification means co-operating with the base station server

adapted to notify users' of mobile devices about the diversion of signals containing cookies to the hybrid server.
8. The system as claimed in claim 1, wherein said wired network is a network at least partially formed of optical fibers.
9. A method of providing data on to mobile devices using a hybrid telecommunication system said method comprising following steps:

■ sending request signals in the form of packets using the first wireless network,
■ receiving said request signals;
■ sensing the density of signals between said mobile devices and the base station server;
■ diverting at least a portion of said request signals on to a wired network, in case the density of the signals exceeds a set threshold;
■ sending said request signals to a web server using the wired network; and
■ transmitting data signals corresponding to the request signals, to said devices using a second wireless network.
10. The method as claimed in claim 9, wherein said method includes the
step of extracting information from the request signals and
converting it into signals compatible with the standard web format.

11. The method as claimed in claim 9, wherein said method includes the step of framing mobile device compatible packets of the data received from the web server.
12. The method as claimed in claim 9, wherein said method includes the step of notifying users of mobile devices about the diversion of signals containing cookies to the hybrid server.