Abstract:
In a communication network a method and system for integrating data and voice services into a single session. Subscribers in a wireless communication network are communicatively linked to information sources in a data network via a gateway. The subscribers submit requests to voice service providers in the data network. A data and voice switching server effects integration of the data and voice services within the current session by suspending the data session, opening an integrated voice and data session and maintaining the integrated session by controlling and coordinating the functionality of an access provider switch, a gateway server, a remote access server, and a voice server. Subscribers are provided integrated voice and data services within a single session. After the completion of the voice services the subscribers transparently reconnected to the data network by the voice and data switching server.

Description:
BACKGROUND OF THE INVENTION  
         [0001]    1. Field of the Invention  
           [0002]    The present invention relates in general to wireless communication systems, and more specifically to a system and method for a controlled integration of data and voice into user interface associated with a single communication session managed from a wireless application protocol compliant mobile terminal.  
           [0003]    2. Discussion of the Related Art  
           [0004]    In the wireless communication market information services are becoming increasingly popular. Such services can provide subscribers with up-to-date information on news, sport results, stock prices, entertainment, flight information, ground transport, timetables, and the like. To increase the value and the scope of such services existing wireless communication systems now support access to global data communication networks such as the Internet and more specifically the World Wide Web (Web). The information stored on content providing sites across the Web can be accessed from wireless networks by utilizing appropriate Wireless Application Protocol (WAP)-compliant mobile stations, such as cellular telephone devices or Personal Digital Assistants (PDA). The Wireless Application Protocol (WAP) is an open, global standard that empowers mobile telephone users with wireless device to easily access and interact with information and services provided over the Web instantly.  
           [0005]    When a subscriber using WAP initiates a connection to the Internet via a suitable user agent, the mobile device sends a conventional RF signal searching for the desired service. When an appropriate radio link or air link is made with the mobile network service provider the subscriber introduces a request for a specific content information by selecting and submitting the identification of a Web resource such as a Web page. The request is sent by the mobile network service provider to a gateway router, which completes the connection to the addressed Web site, retrieves the requested content information from the site and sends the data back along the same communication path to be processed by the subscriber&#39;s device.  
           [0006]    The method of Web navigation via a wireless device utilizing the standard Wireless Access Protocol (WAP) has several disadvantages. One drawback concerns the simplifying of the received Web content due to the design constraints of a typical wireless device. The information retrieved by the gateway is typically a document formatted as an HTML file. The file typically includes highly formatted text content, and hyperlinks to provide navigational capabilities. Typically, the page further includes rich content such as graphics, sound, voice, animation, virtual reality, and the like. In order to fit the format of the document for display on the display area of the requesting wireless device and to the processing capabilities of the device the file is translated by a gateway server from the HTML format to the Wireless Markup Language (WML) format. According to the limitations of a typical mobile device, such as having a display area with minimal physical dimensions, and considerably reduced processing power, the original display format of the received information is simplified. Only carefully selected functional segments of the text are displayed on the screen of the mobile device. The page is clipped by the trimming of practically all the elements therein having advanced multimedia content. Following the elimination of most of the page contents by the clipping process, the options of the subscriber regarding the control of Web navigation by hypertext links are markedly reduced. Though the manner in which basic information is displayed is acceptable, the inputting of commands, Web addresses, e-mail messages, and the like, is inconvenient. Currently the only input option available to WAP subscribers is text typing on the miniature telephone or PDA keypad. In order to input a single letter up to 4 keystrokes are required, on a small size keypad, which is designed for numeric input. Textual form filling is practically impossible, and a prolonged information search is extremely tedious. Contacting multiple network content providers involves extended periods and repeated logins. It will be easily understood that slow-paced navigation on the Web effects the ability of service providers to offer attractive goods or services and to attract customers to use such environment in commercial transactions.  
           [0007]    A particular problem concerning a WAP-based data session is the non-availability of the option to accept incoming calls. The wireless device is open for a single channel. Thus, while Web navigation is in progress, no incoming calls are available. If another party is trying to call a subscriber engaged in a data session, a busy signal is received or the call is transferred to the subscriber&#39;s voice-mail box. Even in multiple channel devices there is no interaction and integration between Voice and Data. Further shortcoming concerns the disablement of the entire set of voice services for the duration of a data session When the subscriber is engaged in a data session no voice services, such as acceptance and placement of calls, playing received voice messages, recording voice messages, advanced voice processing, or the like, can be used on the channel used for accessing the data communication network services. If the subscriber wishes to use a specific voice service the data connection must be terminated by an appropriate logout procedure. Note should be taken that voice services transmitted as data, such as Voice-over-IP (VoIP) can be received within the data session.  
           [0008]    It will be easily perceived by one with ordinary skill in the art that a need exists for a solution for the existing shortcomings of WAP. A substantial improvement could be achieved by providing the subscribers engaged in data sessions with the option of utilizing conventional and advanced voice services in the framework of a single data session.  
         SUMMARY OF THE PRESENT INVENTION  
         [0009]    It is an object of the present invention to provide a new and novel method and system for automatically suspending and resuming data sessions of mobile telephone subscribers, thus enabling the subscribers to receive voice sessions and other services while engaging in data sessions.  
           [0010]    One aspect according to an embodiment of the present invention regards a method for providing to the at least one subscriber device a communication session with integrated data and voice services that includes identifying the subscriber device associated with a data communication session in the first communication network, intercepting voice service related requests transmitted from the service provider device in the second communication network to the subscriber device associated with the data communication session in the first communication network, logically linking the intercepted voice service related requests from the service provider device in the second communication network with the subscriber device associated with the data communication session in the first communication network and suspending the data communication session associated with the subscriber device between the subscriber device in the first communication network and the second communication network.  
           [0011]    Another aspect of the present invention in accordance with a preferred embodiment of the present invention further includes opening a virtual communication session associated with the subscriber device in the first communication network, performing the requested voice service within the framework of the virtual communication session associated with the subscriber device in the first communication network, and resuming the data communication session between the subscriber device associated with the data communication session in the first communication network and the second communication network.  
           [0012]    A second aspect of an embodiment of the present invention regards a system for the management of a communication session with integrated data and voice services includes the elements of a data and voice switching server to control the integration of data and voice services into a data and voice session associated with the subscriber device in the first communication network, and a gateway device controller to suspend and resume the data communication session.  
           [0013]    A third aspect of an embodiment of the present invention regards a method for providing the wireless devices associated with subscribers a data communication session having integrated data and voice services, the method includes classifying the subscriber device associated with a data communication session in the wireless communication network, capturing voice service requests forwarded from the service provider device through the gateway device in the data communication network to the wireless device associated with the data communication session in the wireless communication network, coupling the captured voice service requests from the service provider device in the data communication network to the wireless device associated with the data communication session in the wireless communication network, suspending the data communication session associated with the wireless device between the wireless device in the wireless communication network and the data communication network, opening a data and voice communication session associated with the wireless device in the wireless communication network, executing the requested voice service within the framework of the data and voice communication session associated with the wireless device in the wireless communication network, and resuming the suspended data communication session between the wireless device associated with the data communication session in the wireless communication network and the data communication network.  
           [0014]    The above aspects of the present invention show the integration of data and voice services within a single communication session. The above aspects of the present invention enhance substantially optimized data communication network navigation. The above aspects of the present invention substantially improve the performance of the subscriber device. The above aspects of the present invention provides for substantially easing the load on the communication control devices of the wireless network. The above aspects of the present invention provides for substantially easing the load on the communication control devices of the data and voice network. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0015]    The present invention will be understood and appreciated more fully from the following detailed description taken in conjunction with the drawings in which:  
         [0016]    [0016]FIG. 1 is a schematic block diagram of a mobile communication system incorporating elements operative in data network access known in the art; and  
         [0017]    [0017]FIG. 2 is a schematic block diagram of the mobile communication system of FIG. 1 incorporating elements for providing data and voice services within a single session, in accordance with a preferred embodiment of the present invention; and  
         [0018]    [0018]FIG. 3 is a schematic block diagram of the Data Voice Switching Server, in accordance with a preferred embodiment of the present invention; and  
         [0019]    [0019]FIG. 4 is a block diagram illustrating the components functional in the operation of the Data Voice Switching Server, in accordance with a preferred embodiment of the present invention; and  
         [0020]    [0020]FIG. 5 is a flowchart illustrating the Home Location Register configuration process, in accordance with a preferred embodiment of the present invention; and  
         [0021]    [0021]FIG. 6 is a flowchart of the user parameters handling component, in accordance with a preferred embodiment of the present invention; and  
         [0022]    [0022]FIG. 7 is illustrates the operation of the voice request handling component, in accordance with a preferred embodiment of the present invention; and  
         [0023]    [0023]FIG. 8 illustrates the operation of the request handling component, in accordance with a preferred embodiment of the present invention; and  
         [0024]    [0024]FIG. 9 illustrates the operation of the data session resumption component, in accordance with a preferred embodiment of the present invention.  
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0025]    Referring to FIG. 1 there is depicted block diagram of a mobile communication system, incorporating elements operative in data network access known in the art. Cellular network subscribers  11 , 13 , 15  are associated with mobile stations  10 , 12 , 14  respectively. Stations  10 , 12 , and  14  contain mobile terminals  16 , 18 , 20  respectively. Devices  18 , 20  are WAP-enabled cellular telephone devices such as Nokia 6210/7110, while device  16  is an WAP-enabled Personal Digital Assistance (PDA), such as Hewlett-Packard&#39;s Palmtop or 3Com&#39;s PalmPilot. It should be understood that other devices could be used, such as pagers, two-way radios, smart phones, and communicators. For clarity, FIG. 1 depicts only three mobile stations containing only three respective mobile terminals associated with only three respective cellular network mobile subscribers, but it will be appreciated that the system will incorporate a plurality of mobile stations each servicing its respective subscriber. Wireless devices  16 , 18 , 20  intermittently connect to wireless network  22  by utilizing a built-in radio transceiver. Wireless network  22  effectuates communication between the wireless devices  16 , 18 , 20  as well as between a plurality of wireless devices (not shown) associated with the network  22 . Wireless network  22  could be any of the WAP-compliant wireless network types such as Cellular Digital Packet Data (CDPD), Code Division Multiple Access (CDMA), Global System for Mobile Communications (GSM), Time Division Multiplex (TDMA), Frequency Division Multiplex (FDM), and the like. Wireless network  22  further effectuates communication between the devices  16 , 18 , 20  and other communication networks such as a Public Switched Telephone Network (PSTN) or a data communication network, such as the Internet. Wireless network  22  includes base station  24 , network access service provider switch  26 , remote access server  28 , and WAP gateway server  30 . Also for clarity FIG. 1 depicts only one switch, one base station, one remote access server, and one WAP gateway server, but it will be appreciated that the system will incorporate a number of base stations, switches, and servers. Where the Cellular Digital Packet Data (CDPD) technology is used in the cellular network one or more one or more Direct Access Units (DAU) could be incorporated into the system. Base station  24  is operative in controlling the set of mobile stations  10 , 12 , 14 . Station  24  receives the RF signals transmitted by devices  16 , 18 , 20  and forwards the respective signals to a network access service provider switch  26  utilizing conventional communication links. Switch  26  identifies the subscribers of the transmitting devices and creates a link between two mobile terminals utilizing conventional RF techniques. Switch  26  is also operative in creating a link between a mobile terminal and diverse other communication networks such as a PSTN or a data communication network utilizing both conventional RF techniques and convention communication links. Network access service provider switch  26  contains a Home Location Register (HLR)  27  database. HLR  27  is a centralized database for storing subscription data and other necessary network data associated with the mobile stations  10 , 12 , 14  or with the mobile subscribers  11 , 13 , 15  associated with the mobile stations  10 , 12 , 14  respectively. The HLR  27  further maintains data representative of the current location of the mobile stations  10 , 12 , 14 . Remote access server  28  receives requests for connections to the network  32  from switch  26  and forwards the requests to a WAP gateway server  30 . In wireless networks utilizing CDPD technology a Direct Access Unit (DA) will replace the remote access server  28 . WAP gateway server  30  includes components for processing the requests, for accessing requested resources across network  34 , and for returning the desired information content to the mobile subscriber. Additionally, WAP gateway server  30  functions as a proxy by providing for data caching message screening, and data session management. Data communication network  32  includes resources located on the specific data network sites. The resources comprise content information, applications data, services, and the like. Service provider  34  is a network site preferably incorporating an application server, a content provider server, and appropriate application programming interface routines (APIs).  
         [0026]    When mobile subscriber  13  associated with mobile station  12  desires to access the data communication network  32  for interacting with specific resources, such as Web pages, mobile subscriber  13  instructs mobile terminal  18  to establish a connection to wireless network  22 . Mobile terminal  18  sends a command to an incorporated internal modem or to an incorporated modem emulator to dial, to quick connect or to transfer to the data channel of the wireless network access service provider  26 . Mobile subscriber  13  introduces a suitable request via a WAP-based micro-browser implemented within mobile terminal  18 . A micro-browser is client software designed to enable wireless access to services such as Internet information in combination with a suitable network server.  
         [0027]    The RF signal wrapping the request for the service is transmitted to the wireless network  22 . After the connection is established with the network access service provider switch  26  the request for connection with network  32  is transferred using conventional communication lines via remote access server  28  to a specific WAP gateway server  30 . Server  30  processes the request by performing a translation from Wireless Markup Language (WML) format to Hypertext Markup Language (HTML) format. Subsequently WAP gateway server  30  establishes connection via data communication network  32  with the service provider  34  using conventional communication links. The request for a specific resource effectuates the transmission of a specific Web document back to the WAP gateway  30 . Gateway server  30  examines the returned document in order to determine the format thereof. If the document is formatted in the WML format then the gateway  30  transmits the document unmodified back to mobile terminal  18  in order to enable suitable interaction with the mobile subscriber  13 . If the document received by gateway  30  is formatted as an HTML document then the gateway server  30  encodes the document to WML format prior of the transmission thereof back to mobile station  12  for interaction with the mobile subscriber  13 . The suitably encoded document is displayed by the micro-browser implemented within the mobile terminal  18  on the display device of terminal  18 .  
         [0028]    The period of a connection between a mobile subscriber of a mobile communication session to a data communication network beginning with the initialization of the connection (i.e., the login process), and ending with the termination of the connection (i.e., the logout) is referred to as the “data session”. During the data session the mobile subscriber can selectively and dynamically interact with various resources associated with data network sites, such as information, applications, and services. The interaction with the retrieved content is performed within the prevailing hardware and software constraints of the mobile terminal device. While the mobile subscriber is engaged in a data session no voice services can be performed. Such services can be incoming calls, the playing of a voice message, the recording of a voice message, and the like. The aforementioned services are disabled for the duration of the connection to a data network. In order to utilize voice services the mobile subscriber has to terminate the data session by the sending of a suitable logout instruction to the micro-browser implemented within the mobile terminal device. If after the completion of a specific voice session the mobile subscriber desires to access the data network then a new login procedure has to be performed in order to open a new data session.  
         [0029]    Referring now to FIG. 2 that illustrates a schematic block diagram of a mobile communication system including additional components that provide for the integration of data and voice services within the framework of a single data session, in accordance with a preferred embodiment of the present invention. The additional components described in the present invention enable a mobile subscriber to use voice services while engaged in a data session. As previously described in association with FIG. 1 cellular network mobile subscribers  11 , 13 , 15  are associated with mobile stations  10 , 12 , 14  respectively, which contain mobile terminals  16 , 18 , 20  respectively. Mobile terminals  16 , 18 , 20  intermittently connect to wireless network  22  by utilizing a built-in radio transceiver. Terminals  16 , 18 , 20  also include a modem or a modem emulator and a WAP-based micro-browser. Wireless network  22  effectuates communication between the terminals  16 , 18 , 20  and in the linking of a specific mobile terminal to diverse other communication networks. In the preferred embodiment of the present invention, the referred to data communication network is the Internet. Wireless network  22  includes base station  24 , network access service provider switch  26 , remote access server  28 , data voice switching server  38 , voice server  36 , and WAP gateway server  30 . Base station  24  controls the mobile stations  10 , 12 , 14  and receives the RF signals transmitted by devices  16 , 18 , 20 . Station  24  forwards the respective signals to a network access service provider switch  26 . Switch  26  identifies the mobile subscribers of the transmitting devices and creates an operative connection between the requesting wireless device and the data communication network. Network access service provider switch  26  contains a Home Location Register (HLR)  27  database. Data Voice Switching (DVS) server  38  enables the switching between voice and data channels and is operative in the setting up, control performance, and termination of the integrated data and voice session. DVS  38  has a unique inner design and a specific communication interaction with other communication systems. DVS  38  enables WAP-compliant wireless terminals, such as cellular phones, PDAs, and the like, to have a mixed-mode interface. Mixed-mode interface is defined as an interface that allows the mobile terminal device to activate both voice services and Web navigation within the same data session. Voice server  36  records and communicates voice segments associated with specific voice services within a specific data session. The voice segments are captured, stored, retrieved, reproduced, and played by the appropriate voice applications. Voice server  36  could be any one of a number of the currently marketed products, such as the IBM Websphere Voice Server or the DMV400/DMV4000 voice-processing platform developed and distributed by Intel Dialogic Corporation.  
         [0030]    Remote access server  28  receives requests for connecting a mobile terminal to the data network  32  from switch  26  and forwards the requests to a WAP gateway server  30  using conventional communication lines and devices. WAP gateway server  30  includes components operative in the suitably processing of the requests, in the retrieval of the desired resources from network  34 , and in the transmission of the desired content to the mobile subscriber. WAP gateway  30  also includes components providing proxy server-specific functions such as data caching, message screening, and data session control. Data communication network  32  includes resources located on specific network sites. The resources contain content information, applications data, and services. Service provider  34  is a network site incorporating various services. In the preferred embodiment of the present invention, service provider  34  implements voice services containing voice application routines, voice contents, and voice processing-specific application program interface (API) routines.  
         [0031]    When mobile subscriber  13  associated with mobile station  12 , desires to access data communication network  32  for interacting with specific resources, such as Web pages, mobile subscriber  13  instructs mobile device  18  to establish a connection to wireless network  22 . Mobile device  18  sends a command to the implemented internal modem therein or to the implemented modem emulator therein, to dial, to quick connect or to transfer to the data channel of the wireless network access service provider  26 . Subscriber  13  introduces a request via a WAP-based micro-browser implemented within wireless device  18 . The associated RF signal for the service is transmitted towards the wireless network  22 . After the connection is established with the network access service provider switch  26  the request for connection with network  32  is transferred via remote access server  28  to a WAP gateway server  30  utilizing port numbers, such as 9200 or 9203. Server  30  processes the request by performing a translation from Wireless Markup Language (WML) format to Hypertext Markup Language (HTML) format. Subsequently WAP gateway server  30  establishes connection via data communication network  32  with service provider  34 . The request for a specific resource effects the transmission of a specific Web document back to WAP gateway  30 . Next, gateway server  30  determines the format of the document. If the document is in WML format then gateway  30  transmits the document unmodified back to wireless device  18  in order to enable interaction with subscriber  13 . If the document received by gateway  30  is in HTML format then gateway server  30  encodes the document to WML format prior of the transmission thereof back to mobile station  12  for interaction with subscriber  13 . The suitably encoded document is displayed by the micro-browser on the display device of the wireless device  18 .  
         [0032]    In contrast with the operation of a conventional mobile communication network, the network described on FIG. 2 makes available the option of activating and performing voice services within a data session without compelling the termination of the current data session. Thus, the mobile subscriber can selectively and dynamically interact with diverse resources associated with data network sites, such as information content, applications and services within the prevailing hardware-specific constraints of the mobile terminal device and accept or demand voice services within a single data session. By utilizing the proposed method and system, voice services such as the submission of voice messages, voice replies to e-mail, speaker recognition, voice recognition, text-to-speech, and other advanced voice technologies can be efficiently and seamlessly integrated into a WAP (text only) session. Such technologies can be integrated into the proposed system and method by the utilization of available software products distributed by known vendors. For example, vendors of speech recognition software include IBM, Nuance, Philips Electronics NV and SpeechWorks.  
         [0033]    In order to provide a detailed description of the method and system according to the teaching of the present invention an exemplary voice service will be used. Such description is shown for the purpose of clarity and not limitation. Thus, in the preferred embodiment of the present invention, the specific voice service required by the subscriber and supplied by the system will be a voice message reply to an e-mail message. The service involves the basic ability of recording, storing, and manipulating spoken messages. When a WAP mobile subscriber  11 , 13 , 15  desires to perform a voice reply to an e-mail message the appropriate voice service is initiated by the subscriber  11 , 13 , 15  by the transmission of a suitable request to a suitable voice service provider  34  via the data communication network  32 . Service provider  34  responds to the request by the transmission of a specific web page and associated voice service-specific APIs wrapped within the response. The response is sent to the DVS  38  either directly or through WAP gateway  30 . DVS  38  accepts the response and subsequently calls the gateway servlet  31  in order to instruct the WAP gateway  30  to suspend the current data session. Until the resumption of the data session DVS  38  controls the integrated data and voice session. The APIs transmitted by the voice service provider  34  within the transmitted web page are specific voice service interface routines developed in VOICE XML, C++, ASP COM objects, JAVA, and the like. The APIs are operative in the execution of the voice service by the voice server  36 . DVS  38  processes the response received from the voice service provider  34  and transmits the call to the voice server  36  in order to provide the mobile subscriber  13  with the needed voice service. The subscriber  13  receives the voice-service related web page and interacts with the page in order to perform the recording of the voice message. After the completion of the voice service by the subscriber  13  DVS  38  calls the gateway servlet  31  in order to instruct the WAP gateway  30  to resume the previously interrupted data session. Subsequently, the mobile subscriber  13  is transferred back to the Web navigation mode without being compelled to terminate of the data session.  
         [0034]    The configuration and functionality of DVS server  38  will be described next. FIG. 3 shows a schematic block diagram of the Data Voice Switching Server, in accordance with a preferred embodiment of the present invention. As illustrated by FIG. 3 DVS server  98  comprises a DVS-API stack  99 , an application control segment  100 , a DVS control segment  103 , an administration server  115 , and a voice server  114 . Application control segment  100  consists of application server API translator  101 , application server request router  102 , and application threads  104 . DVS control segment  103  consists of DVS session control  105 , DVS gateway control  108 , DVS RAS control  108 , DVS voice server control  110 , and database  112 . The various components described are shown as co-located within a single platform or environment. It should be noted that the various components could be implemented on any other node on the network access service provider&#39;s Intranet. Voice server  114  could be implemented specifically on a specialized voice platform.  
         [0035]    DVS  98  operates as an interface between the voice service provider  90  located within the data communication network and the wireless network  116 . DVS  98  will usually reside on the network access service provider&#39;s Intranet. The functions of the elements shown on FIG. 3 will be described next. The DVS-API stack  99  receives requests from the application server  92  of the voice service provider  90 . The requests are transferred to the application server API translator  101 . Conversely, the DVS-API stack  99  delivers responses from the application server API translator  101  back to the application server  92  of the service provider  90 . The application server API translator  101  transfers the request to the application server request router  102 . The router  102  determines the location of the application thread  104  for the specific service provider. The request is sent from the application thread  104  to the DVS session control  105  with a suitable notification sent to database  112 . The request is transmitted from DVS session control  105  to DVS gateway control  106  and DVS RAS control  108 . The request is sent from the gateway control  106  to the gateway servlet  31  of FIG. 2. Simultaneously the request is sent from the RAS control  108  to the RAS  28  of FIG. 2 in order to sub-address the mobile subscriber&#39;s call to an appropriate port number of the voice server  114 . The voice server  114  which has received a request notification from the voice server control  110  and received the mobile subscriber&#39;s call parameters from the DVS session control  105  executes the required voice activity, such as recording, playing, mobile subscriber&#39;s identification, and the like. The administration server  115  supervises and controls the activity of the DVS server  98 . It should be noted that a variety of other configurations could be employed for the DVS.  
         [0036]    In accordance with the practices of persons skilled in the art of computer programming, the present invention is described below with reference to acts and symbolic representations of operations that are performed by the processing system. It will be appreciated that the acts and symbolically represented operations include the manipulation of electric signals by a central processing unit (CPU). The electrical system represent data bits which cause a resulting transformation or reduction of the electrical signal representation, and the maintenance of data bits at memory locations in the memory system to thereby reconfigure or otherwise alter he CPU&#39;s operation, as well as other processing of signals. The memory locations are physical locations that have particular electrical, magnetic, or optical properties corresponding to the data bits. The DVS server and the gateway servlet are sets of computer programs implemented on different computing platforms. The DVS server and the gateway server contain computer software instructions specifically developed for the practice of the present invention. The software in the DVS server and gateway servlet causes the server and the servlet respectively to perform the various functions described herein. Alternatively it is noted dedicated electronic hardware can be made and used to perform all server functionality described herein. In the second case the DVS server and the gateway servlet could be implemented as firmware by the embedding of the predetermined program instructions and/or appropriate control information within suitable electronic hardware devices containing application-specific integrated circuits.  
         [0037]    The main program components functional for the integration of voice applications within the framework of a single data session coupled with a WAP-oriented text application are shown in FIG. 4. Referring now to FIG. 4, in order to enable a mobile subscriber to perform voice applications within a data session the Home Register Location (HLR) parameters associated with the specific subscriber should be configured. The Home Location Register (HLR) is a centralized database for storing essential subscriber-specific network control data. The modifications concern the behavior of the system in regard to a specific subscriber. For example in order to compel the mobile subscriber&#39;s modem to accept calls while engaged in a data session the subscriber record in the database should be modified. Modifications of certain subscriber-specific parameters will affect the behavior of the mobile network access service provider switch. For example, in case of an incoming call the parameters set to specific values prevent the system from transferring the call to a busy signal or to a voice mail system. Component  50  is designed to configure the appropriate HLR parameter values. Note should be taken that the update can be performed off-line. Subscriber parameters handling component  52  is operative in obtaining the session-specific and the subscriber-specific parameter values from the system and storing the values to be kept for later processing. Request intercepting component  54  activates a loop in which a TCP/IP socket is functionally receptive over a TCP/IP connection for requests from a voice service provider. Component  54  examines intercepted requests, validates intercepted requests, formats such requests and inserts the requests to a predefined dynamic memory area in order to be processed by the request handling components. Request handling component  56  is operative in obtaining the request from the dynamic memory area, instructing the gateway servlet to suspend the data session and activating the voice server to perform voice services for the subscriber. Data Session resumption component  58  extracts the previously saved session and subscriber parameter values and instructs the gateway servlet to resume the previously suspended data session. It should be noted that a variety of other methods could be utilized for accomplishing substantially the same objectives.  
         [0038]    Referring now to FIG. 5 illustrating the operation of the HLR configuration component  50  of FIG. 4. FIG. 5 illustrates the operational steps performed by component  50  of FIG. 4 in order to appropriately configure the Home Location Register (HLR)  27  of FIG. 2. The necessary configuration process is performed in order to provide to subscribers the option of utilizing voice services integrated into a convention data session. Configuring the HLR configuration involves the activation of a specifically developed program product. The program product accepts subscriber-specific input from an external source and applies updates the associated subscribers&#39; records within the HLR. The configuration procedure is typically performed offline and involves manual input by the administrator of the system. At step  152  the identification of a subscriber such as the cellular phone number thereof is obtained. At  154  the HLR database is opened and at step  156  the subscriber&#39;s record, indexed by the subscriber&#39;s identification, is obtained from the HLR database. A subscriber&#39;s HLR record is structured such that specific control fields defining specific subscriber options are given different values. The values are indicative of the provision of specific network operator supplied services to the subscriber. One of the control fields is operative in providing the subscriber with the call waiting service. When the field is set to a specific value the calls made during a period in which the subscriber&#39;s device is busy with an another call are diverted to a call-waiting switch to be handled thereby appropriately. Such handling could involve indication to the called party that a call is waiting, or providing the caller with the option of recording a voice message. This call divert field is utilized at step  158 . The program will effect the insertion of an additional control value to the field, which will be operative in providing the subscriber with the option of using voice services within a data session. At step  160  the record will be written back to the database.  
         [0039]    It would be easily perceived by one with ordinary skill in the art that other diverse methods could be employed in order to indicate the availability of the service for a subscriber. For example, specific control field could be added to the subscriber&#39;s record within the HLR database or a new data structure separate from the HLR could be built with a specifically created field within the subscriber&#39;s record within the HLR utilized as a pointer to the new structure.  
         [0040]    Referring now to FIG. 6 that illustrates the operation of the Subscriber Parameters Handling Component  52  of FIG. 4. Network access service providers typically assign a unique number for each subscriber. In different network schemes the mobile subscriber is identified in different manner. In mobile wireless networks, the subscriber is typically identified by the Mobile Subscriber ISDN (MSISDN) number. MSISDN is used for call related requests and it is visible to both the caller and the subscriber as the dialed number. Thus, requests from the network will be based on MSISDN. The subscriber can be also identified by other identification means, such as the International Mobile Subscriber Identity (IMSI) number, which is typically used in the Global Standard for Mobile communication (GSM) cellular systems. GSM systems are primarily available in Europe. In GSM systems the IMSI is held in the subscriber identity module (SIM) of the mobile station, typically on a “SIM card” that is inserted inside all GSM wireless devices in order to identify the subscriber to the GSM network. The ISMI is not visible or accessible to the subscriber.  
         [0041]    Each data session is assigned a unique ID by the network access service provider. The DVS server  38  retrieves the unique session ID by utilizing the subscriber&#39;s identification number such as a MSISDN number as a key (step  60 ). At step  62  the DVS  38  by using the standard Remote Authentication Dial-In User Service (RADIUS) protocol interfaces to a RADIUS server in order to obtain the subscriber&#39;s parameter values. RADIUS is an authentication and accounting system used by many service providers. When a subscriber dials in to a service provider the user typically enters the username and the password thereof. The information is passed to a RADIUS server, which checks that the information is correct, and then authorizes access to the system. The information is also stored on the RADIUS server for the duration of a session. The DVS retrieves the stored values from the RADIUS server by indexing the current session identification value into the RADIUS database. The parameters thus obtained include the subscriber&#39;s IP address, the subscriber&#39;s user-name, and the password thereof. The information is stored in the database of the DVS server  38  (at step  64 ) to be used after the completion of the voice service for the resumption of the suspended data session.  
         [0042]    In other embodiments of the present invention other methods could be employed. For example, the DVS could retrieve and store the subscriber information form the network access service provider independently of the RADIUS server or the DVS could assign a specific session identification to be connected to the unique session identification allocated by the network access service provider.  
         [0043]    [0043]FIG. 7 is the method for intercepting voice service-related requests transmitted by a service provider. The method is utilizing a TCP/IP socket or an endpoint in a connection to be functionally receptive to a request from the service provider over a TCP/IP connection (step  70 ). The socket is created and used by utilizing a known set of programming requests or socket APIs. In other embodiments of the present invention other connection methods could be used For example, the UNIX C sockets could be utilized. At step  72  the method performs a check regarding the interception of a request from the voice service provider. If no request was intercepted then the method&#39;s control effects a return to step  70  in order to wait for further incoming requests. If a request interception event is recognized then at step  74  the intercepted request is validated. The validation process checks the subscriber&#39;s identification and the introduced password in order to determine whether the request&#39;s origin is known to the system. If the request is valid at step  78  the request is formatted to a structure suitable for insertion to a memory device. Additional information such as the service type and control data is attached to the formatted record. At step  66  the request is inserted into a dynamic memory device, such as a buffer, ready for processing by the request handler component. FIG. 8 shows the operation of the request handling component  56  of FIG. 4. At step  82  the request handler component retrieves an intercepted, validated, and formatted request from the dynamic memory device, such as a buffer. Next, at step  84  the request handler transmits a command to the gateway servlet associated with the WAP gateway to suspend the currently managed data session. As a result the WAP gateway server suspends the session and notifies the handler of the event by transmitting a confirmation message to the DVS  38 . The suspension of the data session does not terminate the session allowing a voice session to be initiated and conducted at the same time as the session data is pending. At step  86  the handler instructs the network access service provider switch  26  to sub-address the call to the voice server  36 . The switch sub-addresses the call to the voice server  36  and sends confirmation to the handler. Subsequently voice server  36  opens a voice channel and a virtual data channel to the subscriber  10 , 12 , 14 . Opening of the voice channel while the data channel is suspended enables the gateway server  30  to later resume the data channel automatically and without need for the subscriber to initiate a new request for a data channel. At step  88  the requested voice service is performed by the voice server subsequent to the appropriate command sent by the handler to the voice server  36 .  
         [0044]    [0044]FIG. 9 illustrates the operation of the data session resumption component  58  of FIG. 4. Subsequent to the completion of the voice service the previously suspended data session is restarted by the Data Session Resumption component  58  of FIG. 4. At step  92  the previously saved session and subscriber parameter values are read from the storage. The component sub-addresses the call to the RAS at step  94 . At step  96  the stored subscriber identification is retrieved from the RADIUS server and at step  98  a command is sent to the gateway servlet associated with the gateway server to resume the data session. The gateway server resumes the session and provides the subscriber with the option of continuing the previously suspended Web navigation.  
         [0045]    It will be easily perceived by one with ordinary skill in the art that the steps and components mentioned in the foregoing description were provided as examples and were not intended to be limiting. Diverse other components and methods could be used to accomplish the underlying objectives of the present invention and several enhancements and improvements to the described embodiment could be contemplated within the framework of the general issues inherent in the proposed system.  
         [0046]    The above description of the construction and use of systems incorporating a plurality of mobile terminals, base stations, switches, transceivers, modems, and servers makes particular reference to use in a land based communication system. However, it will be understood that the use of the technique is in no way limited to land based systems and that it is equally applicable to mobile communication systems incorporating geo-stationary, middle-earth-orbit, or low-earth-orbit satellite nodes.  
         [0047]    Persons skilled in the art will appreciate that the present invention is not limited to what has been particularly shown and described hereinabove. Rather the scope of the present invention is defined only by the claims, which follow.