A System And Method For Data Usage Management In An Electronic Device

FIELD OF THE INVENTION The present invention relates to a system and method for data usage management in an electronic device, and more particularly, to a system and method for providing enhanced control over estimate and overall cost and consumption of data in electronic devices. BACKGROUND OF THE INVENTION Today is an era of smart phone wired or wireless devices such as but not limited to Tablets, Phablets, PDA, touch phone, feature phone, wearable computing devices, handheld devices, flexible devices, etc. As the usage of smart phone devices increase so is the uses of associated technology such as but not limited to internet surfing, web chatting, instant messaging, etc. Also there are certain applications which run in background. However, a user of the device is mostly unaware of the data usage of the various applications or technologies which are running. The effect of this unawareness is that user has to bear the additional cost of the data download. One can say that there are several ways in which the user can identify the data usage, like using the "data usage" setting in the Android devices. However these are all limited to the fact that the usage is shown in the form of data units, like MBs (Megabytes) or in GBs (Gigabytes) or the like. The user is more concerned about the cost of the data used and is least concerned with the technical terms of the data units. Conventional solution describes a postage metering and printing system in which there is flexibility that device can be used to print the postage stamp of any desired denomination of any country. The flexibility of changing the local currency helps in customizing the stamp as per local requirements. 3 Conventional solution describes a system and method of providing a notification to the mobile device in case the thresholds of certain variables are reached. However, notification is only for the threshold reached. The disclosed prior art does not give user a firsthand experience where he can check his instantaneous data usage or the flexibility to check the data usage in the form of currency of his choice. The present invention describes a system and method to provide a user with the flexibility to check the data usage by incurred cost. SUMMARY OF THE INVENTION The present invention describes a system and method for helping user to save cost by providing enhanced control over cost and data usage in mobile devices. In one aspect, the present invention describes a system and method to show estimated cost by enabling people to view the price they will have to pay for consuming content before, after and during downloading of the data or streaming content. In another aspect, the present invention describes a system and method that will provide a notification to a user when certain thresholds have been reached or exceeded or about to be exceeded as set by user, relating to data consumption in the form of data usage notifications for a particular time period such as but not limited to daily notification, monthly notification, etc. to keep track and manage the data usage by the user. It also provides a system and method that will allow a user to set restrictions on data usage and downloading. In another aspect, the present invention describes a system and method to track the download expenses in currency set by the user such as but not limited to local currency, currency of a foreign country, etc., as data usage in data units is not 4 understood by users and budgeting in terms of money is easier rather than data units. In another aspect, the present invention describes widgets or applications and data displays for monitoring data cost for a time period. In another aspect, the present invention describes a system and method to provide Data Handover on Roaming. In yet another aspect of the present invention, an Application data usage indication is provided which allows the users to view the amount of data being consumed in indicator area, while accessing the application. BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects and features of the invention will become apparent from the following description of preferred embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 illustrates the system of the present invention. Figure 2 illustrates the data usage management system. Figure 3 illustrates the viewing of the estimated cost. Figure 4 illustrates the implementation of notification. Figure 5a illustrates a widget or an application. Figure 5b illustrates a widget or an application, checking data plan and current data usage and displaying red or green circle depending on the result. Figure 6 illustrates a flowchart for data handover on roaming in multi SIM phone. Figure 7 illustrates the cost estimation unit. Figure 8 illustrates the notification generation unit. Figure 9 illustrates the handover unit. 5 DETAILED DESCRIPTION OF THE INVENTION In one embodiment of the present invention, a system for monitoring a mobile communication device is provided. The system provides enhanced control over overall cost and consumption of data in mobile devices by providing estimate of the cost of download before, after and during downloading of the data. The system comprises a cost estimation unit for cost estimation of the download before, after and during downloading of the data; a notification generation unit for displaying notifications and restricting data usage, when a threshold is reached; a widget or an application and data displays for graphical representation of consumed data; a handover unit for switching data services in multi SIM phones from roaming SIM to non roaming SIM; and an application data usage unit. Roaming SIM is the SIM which is outside the home network i.e., the SIM whose connectivity service is extended in a location that is different from the home location, where the service was registered. However, the home SIM or non roaming SIM is inside the home network or inside a particular boundary where the SIM is registered. Data handover is the process of transferring the data services from one SIM to another SIM i.e., from roaming SIM to home SIM or non roaming SIM. In another embodiment of the present invention, the cost estimation unit of the system of present invention further comprises: means for calculating the size of selected file; means for reading cost details from settings; means for estimating cost; and display unit for viewing the estimated cost. In another embodiment of the present invention, the notification generation unit of the system of present invention further comprises: means for calculating data usage threshold; means for checking data usage by reading consumed data usage 6 details from radio and/or network interface; means for showing notifications; and means for restricting data usage based on threshold. In another embodiment of the present invention, the handover unit of the system of present invention further comprises: means for reading SIM data preference setting; means for checking current data subscription of the SIM; means for switching the data services to other SIM; and means for enabling data services. In another embodiment of the present invention, a method for data usage management in an electronic device is provided. The method comprises the steps of: viewing estimated cost of download by a cost estimation unit; implementing data usage notifications for display to user of the electronic device by a notification generation unit; tracking download expenses in currency set by the user; monitoring data cost by a widget or an application and data displays; switching data services in multi SIM phones from roaming SIM to non roaming SIM by handover unit; and indicating application data usage by application data usage unit. The method for viewing estimated cost comprises the steps of: selecting file to download; calculating the size of the file by means for calculating the size of selected file; reading data cost details from setting by means for reading cost detail; calculating estimated cost for downloading by means for estimating cost; and displaying estimated cost by display unit for viewing estimated cost. The method for implementing data usage notifications comprises the steps of: calculating data limit for a time period by means for calculating data usage threshold; reading consumed data usage details from radio and/or network interface by means for checking data usage; displaying data usage notification by means for showing notifications, if data usage exceeds limit; and restricting data usage if it exceeds limit by means for restricting data usage based on threshold. 7 The method for switching data services in multi SIM phones from roaming SIM to non roaming SIM comprises the steps of: reading SIM data preference setting by means for reading SIM data preference setting; checking current data subscription SIM by means for checking current data subscription of the SIM; switching the data services to other SIM by means for switching to other SIM, if the current data subscription SIM is Roaming SIM; and enabling data services, if the SIM data preference setting is not Roaming SIM. In another embodiment of the present invention, a method for data handover on roaming in multi SIM phone is provided. The method comprises the steps of: switching data services to home SIM from the roaming SIM, when the non roaming SIM data preference is set before the SIM is moved from home area to roaming area; and switching data services to the non roaming SIM from roaming SIM, when the SIM is already in roaming and the non roaming SIM data preference setting is turned on after moving to roaming area, wherein the data services are switched by handover unit by means for reading SIM data preference setting, means for checking current data subscription of the SIM, means for switching to other SIM and means for enabling data services and all the means are controlled by a Handover Unit (HU) Controller. In another embodiment of the present invention, the system and method of present invention provides option to track and control individual applications so that they do not consume data in background and during, but not limited to roaming. The system and method of the present invention gives users, the reminder to switch to Home network for data usage. The system of the present invention always shows the details of data usage in currency set by the user. Present invention shows the user the estimated cost and if user thinks the cost is too high he can schedule the download for later when another type of data communication channel;, such as but not limited to WiFi, Bluetooth, etc.; is available. Also he can choose to share this download cost with 8 people nearby using separate application Data Pooling. He can also decide to add this file to his wishlist and download it later. The system and the method of the present invention gives user notification, when user is about to exceed data limit. This will help user to control the usage such as but not limited to on daily and monthly basis. User can set the threshold for notification generation. The widget on home screen notifies by changing colour such as but not limited to becoming red when the threshold is reached. This keeps user conscious of his data usage. The notification can be in other form also such as but not limited to vibration alert, popup, warning, etc. The present invention provides option to restrict certain applications from using Mobile Data during, but not limited to, roaming. This helps in saving data cost incurred by applications in roaming. In multi SIM phones, the system and the method of the present invention gives users the reminder to switch to Home network for data usage. This applies when user has multiple SIMs, atleast one in home network and others being in Roaming network and when user is using Roaming network for Data Usage. It enables user to restrict background data for certain applications. This ensures that application do not consume heavy data without user’s acknowledgement. The system and the method of the present invention track and control individual applications so that they do not consume data in background and also during, but not limited to, roaming. It helps in tracking download expense in the currency set by users such as but not limited to local currency, currency of foreign country, etc. The widget gives easy visualization of data consumed. It also gives a quick access to control data. 9 The present invention shows the usage details in widget for easy monitoring and control. It enables user to set his/her data plan and customize application accordingly. The system and the method of the present invention helps user to save cost via easy data management by data usage meters such as but not limited to surfing meter, data download meter, data estimation meter, etc. Figure 1 illustrates the system (10) of the present invention, comprising: Data Usage Management System (11), User Input Unit (12), Output Unit (13), Network Interface Unit (14) and Handover Unit (15), wherein all the units are bidirectional units and are connected to a common system bus. The system gives output based on the input given by user. Figure 2 illustrates Data Usage Management System (DUMS) (11), comprising: Cost Estimation Unit (16), Size Calculator (17), Cost Database (21), Application Data Usage Unit (18), Notification Generation Unit (19), Widget Controller (20), Time Period Estimator (22), DUMS Memory (23), Display Controller Interface (24) and User Input Interface (25). In a preferred embodiment, Figure 3 shows the viewing of the estimated cost. The system will share data cost set by user per KB or per MB or in any other data units. When user download any content, data usage cost will be calculated as: Estimated Cost= (File Size (KBs or MBs or GBs) * data rate(per KB/MB/GB)) Without departing from the scope of the invention, this estimated cost can be further rounded off to two decimal digit for the convenience of user Viewing estimated cost comprises the steps of: selecting file to download; calculating the file size in KBs or per MBs or in any other data units by a browser; reading data cost details from the user defined setting; and calculating estimated cost for downloading. 10 Figure 4 shows the implementation of notification such as daily/ monthly/ weekly / quarterly/ etc. notification. Based on monthly limit, daily limit will be calculated. And then user can set daily data usage notification. When daily data usage limit is crossed, notification will be displayed to user. Daily usage notification will protect end user for excess download in case of prorated data usage calculation. A sample calculation is as under for daily notifications: Daily Data Usage Limit= Monthly Limit/30 Set daily notification<=Daily Data usage Limit The same calculation can be implemented for setting notifications for other time periods such as, but not limited to daily, monthly, quarterly and annually without departing from the scope of the invention. The implementing data usage notifications comprises the steps of: setting data usage limit and notification in settings; reading consumed data usage details from radio and/or network interface and calling framework Application Programming Interface (API) to notify, If data usage exceeds threshold set by user. Figure 5a illustrates a widget or an application and data displays, which is a graphical representation of Data Consumed where the entire circle represents the Data Limit. 1. Green area represents the data consumed within the data warning range. Once the warning range is reached, green area is replaced by red one and we get a notification. The colour mentioned could be different as per user choice or system defined without departing from the scope of the invention. 11 2. Once the entire area has been filled with Red, it represents the data limit has been reached and we get a notification from Network Layer. The Widget periodically checks for the data consumed on network such as but not limited to Cellular Network, Wifi network, Bluetooth network, etc. for a given data cycle and compares the consumed data with the Data Warning Values or Threshold. The Widget applies the red circle at the calculated index, if the consumed value exceeds from the Data Warning value and applies the green circle at the calculated index, if the consumed value does not exceeds from the Data Warning value. a) Widget periodically check for the data consumed on Cellular Network for a given data cycle. b) It then calculates the index(0 to 15) for the appropriate circles from the list of either green Circles or Red Circles In Figure 5b, in step 201, the widget checks the data plan. In step 202, the current data usage is checked. In step 203, depending upon the result the red or green circle is displayed. If the data usage exceeds the data plan, red circle is displayed. if the data usage does not exceed the data plan, green circle is displayed. c) It then compares the consumed data with the Data Warning Values (set in NetworkPolicy class). d) If the consumed value exceeds from the Policy Warning Value, it applies the red circle at the calculated index else applies green circle. Figure 6 shows a data Handover on Roaming in multi SIM phone. If one SIM is moved from Home area to Roaming area, data services will be switched to other Home SIM, provided the KEY_DATA_ROAMING_STATUS settings is true. 12 If one SIM is already in Roaming and user then checks the setting for home SIM data preference, it will switch the data services to other Home SIM. This means that if the setting was turned on after moving to roaming area, then also the functionality would work. SIM1- Home Area SIM2- Roaming Area Setting: Home SIM data preference “true” In Figure 6, in step 101, the SIM data preference setting, N, is read. In step 102, the SIM data preference setting, N, is compared with Roaming SIM. In step 103, if the SIM data preference setting is Roaming SIM, then current data subscription of the SIM is checked. In step 104, if the current data subscription SIM is Roaming SIM, the data services will be switched to other SIM i.e. to home network SIM. In step 105, if the SIM data preference setting is not Roaming SIM, data services are enabled. In application data usage indication, when any application launch, framework will broadcast the launched application package detail and this solution will get the data usage detail based on application ID from RIL layer and notify the usage to user. a) The system will identify the application launched by using its application ID (appID) b) It then queries INetworkStatsSession class (provided by Network Layer) for the Data consumed by the entire applicaitons for a given cycle which is given in the form of NetworkStats [INetworkStatsSession.getSummaryForAllUid(NetworkTemplate, startDate, endDate, boolean)] c) It then iterate the NetworkStat for each NetworkStats.Entry and compare the uid for the desired application. 13 d) Once it get the Desired NetworkStats.Entry, it calculates the data consumed for the given application (NetworkStats.Entry.rxBytes+ NetworkStats.Entry+txBytes). e) Based on the calculation it may or may not generate a notification with the data consumed by a currently launched application in the Notification Panel. Without departing from the scope of the invention the network could be LAN, WAN, MAN, MANET, WiFi, Bluetooth, Peer-to-peer, or like which are known in the art. Figure 7 illustrates the cost estimation unit (16) of the system of present invention, wherein means for calculating the size of selected file (161), means for reading cost details from settings (162), means for estimating cost (164) and display unit for viewing the estimated cost (165) are all connected to a Cost Estimation Unit (CEU) Controller (163). Figure 8 illustrates the notification generation unit (19) of the system of present invention, wherein means for calculating data usage threshold (191), means for checking data usage (192), means for showing notifications (194), and means for restricting data usage based on threshold (195) are all connected to a Notification Generation (NG) Controller (193). Figure 9 illustrates the handover unit (15) of the system of present invention, wherein means for reading SIM data preference setting (151), means for checking current data subscription of the SIM (154), means for switching to other SIM (155) and means for enabling data services (152) are all connected to a Handover Unit (HU) Controller (153). Complete flow can be divided into several steps. 14 1. Configure the data usage meter - Set your data plan - Data to be used in a month in Kilobyte, Megabytes or Giga Bytes or any other data unit. Set the cost of this data and define the currency. - Set a desired threshold for showing notification. - Select applications for which background data should always be restricted or can be provided based on user preferences. - Select applications to restrict background data on Roaming or can be provided based on user preferences. 2. Data usage meter widget Enable data usage meter widget. The widget can be placed on home screen, however it is not mandatory. 3. After configuration : User will be able to see notification whenever he is about to download any file. This notification will display the estimated cost of download (based on the plan set by user during configuration). User can decide to download the file right away or decide to schedule it later when another type of data communication channel;, such as but not limited to WiFi, Bluetooth, etc.; is available. If user selects later option file will be downloaded automatically when another type of data communication channel;, such as but not limited to WiFi, Bluetooth, etc.; is connected. User will get notification when the threshold value for data has been reached for a time period like in a day or in a month. Applications for which Background data has been restricted will not be consuming any data when running in background. When user is in roaming networks, applications restricted for roaming will not access any data in roaming network. Present invention shows the estimation of cost before the cost is actually incurred to help in taking informed decision. Knowing the details of data consumed in the currency set by user helps in better understanding of the cost incurred. There is option to schedule the download on another type of data communication channel;, 15 such as but not limited to WiFi, Bluetooth, etc.; to save cost. Constant monitoring of data helps in making the best of the data available. Warning notifications could be customized as per users choice or could be system default as provided with the widget. Data cost is reduced by restricting data usage of certain apps on background and in roaming. The present invention helps in tracking download expense in the currency set by user. It shows the usage details in widget or an application and data displays for easy monitoring and control. It enables user to set his/her data plan and customize application accordingly. The data usage meter widget gives easy visualization of data consumed. It also gives a quick access to control data consumption. The present invention shows an estimate of the cost of download before, after and during downloading of the data. User can check the estimated cost for download and decide to download now or later. User can also chose to select whether to download content from cellular data communication network or by other type of data network as per the estimated cost. It always shows the details of data usage in the currency set by user and it provides option to restrict certain applications from using Mobile Data during, but not limited to, roaming. This helps in saving data cost incurred by applications in roaming. In multi SIM phones, the present invention gives users the reminder or notification to switch to Home network for data usage. This applies when user has multiple SIMs, one in home network and others in Roaming network and when user is using Roaming network for Data Usage. The system of the present invention enables user to restrict background data for certain applications. This ensures that application do not consume heavy data without user’s acknowledgement. 16 The system of the present invention shows the user, the estimated cost and if user thinks the cost is too high he can schedule the download for later when another type of data communication channel;, such as but not limited to WiFi, Bluetooth, etc.; is available. Also he can choose to share this download cost with people nearby using separate application Data Pooling. He can also decide to add this file to his wishlist and download it later. The present invention provides option to restrict certain applications from using Mobile Data during, but not limited to, roaming. This helps in saving data cost incurred by applications in roaming. While the foregoing written description of the invention enables one of ordinary skills to make and use what is considered presently to be the best mode thereof, those of ordinary skill will understand and appreciate the existence of variations, combinations and equivalents of the specific embodiments method and details herein. While the preferred embodiments of the invention have been described and illustrated, it will be appreciated that various changes can be made therein without departing from the scope of the invention. 17 WE CLAIM: 1. A method for data usage management in an electronic device, comprising: viewing estimated cost of download by a cost estimation unit; implementing data usage notifications for display to a user of the electronic device by a Notification Generation unit; tracking download expenses in a currency set by the user; monitoring data cost by a widget or an application and data displays; switching data services in multi SIM phones from a roaming SIM to a non roaming SIM by handover unit; and indicating application data usage by application data usage unit. 2. The method for data usage management in an electronic device as claimed in claim 1, wherein viewing estimated cost comprises the steps of: selecting file to download; calculating size of the file by means for calculating the size of selected file; reading data cost details from setting by means for reading cost detail; calculating estimated cost for downloading by means for estimating cost; and displaying estimated cost by display unit for viewing estimated cost. 3. The method for data usage management in an electronic device as claimed in claim 1, wherein implementing data usage notifications comprises the steps of: calculating data limit for a time period by means for calculating data usage threshold; reading consumed data usage details from radio and/or network interface by means for checking data usage; displaying data usage notification by means for showing notification, If data usage exceeds limit; and 18 restricting data usage if it exceeds limit by means for restricting data usage based on threshold. 4. The method for data usage management in an electronic device as claimed in claim 1, wherein the widget periodically check for the data consumed on cellular network for a given data cycle and compares the consumed data with the Data Warning values. 5. The method for data usage management in an electronic device as claimed in claim 1, wherein the widget applies the red circle at the calculated index, if the consumed value exceeds from the data warning value. 6. The method for data usage management in an electronic device as claimed in claim 1, wherein the Widget applies the green circle at the calculated index, if the consumed value does not exceeds from the data warning value. 7. The method for data usage management in an electronic device as claimed in claim 1, wherein switching data services in multi SIM phones from the roaming SIM to the non roaming SIM comprises the steps of: reading SIM data preference setting by means for reading SIM data preference setting; checking current data subscription SIM by means for checking current data subscription of the SIM; switching the data services to other SIM by means for switching to other SIM, if the current data subscription SIM is the roaming SIM; enabling data services, if the SIM data preference setting is not the roaming SIM. 8. A method for data handover on roaming in multi SIM phone, comprising the steps of: 19 switching data services to home SIM from the roaming SIM, when the non roaming SIM data preference is set before the SIM is moved from home area to roaming area; and switching data services to the non roaming SIM from roaming SIM, when the SIM is already in roaming and the non roaming SIM data preference setting is turned on after moving to roaming area, wherein the data services are switched by handover unit by means for reading SIM data preference setting, means for checking current data subscription of the SIM, means for switching to other SIM and means for enabling data services and all the means are controlled by a Handover Unit (HU) Controller. 9. A system for data usage management in an electronic device, comprising: a cost estimation unit for viewing cost estimation of download before, after and during downloading of the data; a Notification Generation unit for displaying notifications and restricting data usage, when a threshold is reached; a widget or an application and data displays for graphical representation of consumed data; a handover unit for switching data services in multi SIM phones from roaming SIM to non roaming SIM; and an application data usage unit. 10. The system for data usage management in an electronic device as claimed in claim 1, wherein the system provides option to track and control individual applications so that they do not consume data in background and while roaming. 20 11. The system for data usage management in an electronic device as claimed in claim 1, wherein the system gives users the reminder to switch to home network for data usage.