Patent Document

TECHNICAL FIELD OF THE INVENTION 
       [0001]    The invention relates to a system and method for transmitting the identity of a user in a mobile communication network, and in particular to ensure that a calling party&#39;s identity is displayed at a called party in a manner suitable to the calling party while decreasing the time needed for establishing a call. 
       BACKGROUND OF THE INVENTION 
       [0002]    Today&#39;s mobile communications networks with the advent of GSM (Global System for Mobile Communications) and UMTS (Universal Mobile Telecommunications Standard), it has become possible to provide an increasing number of services to mobile users. These services, provided by network operators, allow a mobile terminal to be extremely versatile and attractive to prospective buyers. Such services allow for a user to browse the internet, download traffic information etc. 
         [0003]    Such services are the line and name identification services, which provide both the calling and the called party the option to allow or restrict the display of calling or connected entities, like numbers or names. Usually, the calling line identity that is to be displayed at the called party side is provided by the subscriber&#39;s HLR (Home Location Register), whereas the calling name to be displayed is obtained from a calling name database. During call set up, the calling line identity is used to query the calling name database. 
         [0004]    Furthermore, network providers are coming up with services that can provide the calling party the option to keep the calling number private but at the same time allow the called party to know the caller&#39;s calling name. 
         [0005]    However, systems lack the ability for the calling party to modify the calling name that is to be displayed at the called party. Normally, the calling name that is displayed at the called party is the name with which the subscription is registered and is stored in the calling name database or is the name stored in the called party&#39;s phonebook. In both cases it can not be changed without the intervention of the network provider or the called party. 
         [0006]    Furthermore, operators also provide payphone and mobile phone rental services, whereby subscribers are provided with mobile phones that contain a Subscriber Identity Module SIM card for temporary use. However, in these cases the calling number is hidden from view. Therefore the caller has no possibility in identifying himself to the called party. This can lead to calls being rejected, as called parties do not answer unidentified calls. Additionally, when setting up a call between a caller party and a called party, querying the calling name database in order to extract the required information is necessary which, in turn, increases the time taken to set up the call and the cost of the call. Such an example can be seen in U.S. Pat. No. 6,343,120 to Rhodes, whereby a caller identity alias is provided by a caller and located in a name database. The caller can provide multiple aliases for his calling number. Each alias is associated with a particular status indicator field. When a call is established between the caller and a called party, a terminating Local Exchange Switch LEC, if the called party is located in a fixed network, or a terminating Mobile Switching Centre MSC, if the called party is located in a mobile network, will send upon receiving a request for a call establishment with the called party, a query to the name database in order to associate the calling number with a calling name. Depending now on the particular status indicator field that is provided with the calling number, the query will then access the database and retrieve the appropriate alias to be displayed at the called party. The amount of time required to retrieve the alias can be significant and thus increase the time needed to set up the call. 
         [0007]    In  FIG. 1 , a diagram of the message flow used to perform a call set up is shown. A user (calling party) MS 1  wanting to set up a call to another user (called party) MS 2 , transmits a call set up message to its serving Mobile Switching Centre MSC 1 . The Mobile Switching Centre MSC 1 , in turn, transmits a set up request that includes the calling line identity to the serving Mobile Switching Centre MSC 2  of the called party. The Mobile Switching Centre MSC 2 , requests information concerning the validity of the called party from a Visitor Location Register VLR 2 , that it is connected to. After the information request has been acknowledged, the Mobile Switching Centre MSC 2 , then queries a name database located in the network in order to retrieve the identity, for example the name of the calling party, by providing the calling line identity. Once the identity has been retrieved then the Mobile Switching Centre MSC 2  contacts the called party in order to establish the call and provides the called party with the identity of the calling party. 
         [0008]    With today&#39;s technology it is possible for a user to transmit solely text strings, which represent, for example, the name that the user wants to transit, or photographs with or without a text string attached. Both of these options form the user&#39;s identity, that can be transmitted to an end user (called party) when setting up a call. 
       SUMMARY OF THE INVENTION 
       [0009]    Decreasing the time to retrieve call aliases, and at the same time allowing a subscriber or a user the freedom to modify the identity which is displayed when setting up a call, is disclosed in the invention. The invention decreases the time taken for a query to be performed and allows a user to modify his/her identity on a permanent basis. 
         [0010]    In one embodiment of the invention, there is a method of transmitting an identity of a user from a terminal to a database and permanently storing information of the user, in a mobile telecommunications network, including receiving input from the user at the terminal representing the identity, whereby the identity is modified on a permanent basis by the user, transmitting from the terminal in the form of a message, the identity to the database, and storing upon reception of the message the identity at the database. 
         [0011]    In another embodiment of the invention, there is a system to transmit an identity of a user from a terminal to a database adapted to permanently store information of the user, in a mobile telecommunications network, including an input device adapted to allow the user to input the identity at the terminal, whereby the identity is modified on a permanent basis by the user, 
         [0000]    a transmitting device adapted to transmit in the form of a message, the identity from the terminal to the database, and a storage device adapted upon reception of the message to store the identity at the database. 
         [0012]    The combination of the features results in the reduction of the time taken to perform a query and therefore reduce the amount of time for a call to be set up between two parties. Furthermore, they also allow a user to modify his/her identity on a permanent basis. 
         [0013]    Further advantages include, for example, a user&#39;s ability to modify and use a textual string and/or a photograph as an identity, and whereby the database is a Home Location Register, and whereby the database downloads the identity to another database that stores the identity temporarily. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0014]    The present invention will become more fully apparent from the detailed description given herein-below and the accompanying drawings which are given by way of illustration only, and thus are not limitative of the present invention, and wherein: 
           [0015]      FIG. 1  shows a message flow chart indicating a call set up between two mobiles stations and how the name of the caller party is transmitted to the called party as performed in the conventional art. 
           [0016]      FIG. 2  shows a block diagram of a network in accordance with the invention. 
           [0017]      FIGS. 3   a ,  3   b , and  3   c  illustrate message flow diagrams in accordance with the invention 
           [0018]      FIG. 4  shows a block diagram of the different entities that comprise the system. 
           [0019]      FIG. 5  shows a block diagram of the relationship between different entities that comprise the system. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0020]    In today&#39;s wireless networks, the identity, for example the calling name of a user requesting the set up of a call, is displayed at the called party only if the called party has a subscription with the network operator. In particular, the subscriber has to have a subscription to the Calling Name Presentation CNAP supplementary service. CNAP is a service that is provided for in the Wireless Intelligent Network WIN draft of the Telecommunications Industry Association Standards Committee TR45.2, as well as in IS-764. 
         [0021]      FIG. 2  shows a block diagram of a network where the proposed invention is implemented. Network  100  includes a mobile communications system  101 . In addition, also shown is a public switched fixed line communications system  102 . The mobile communications system is a GSM or UMTS system. Mobile communications system  101 , includes a mobile switching centre (MSC) MSC 1  and MSC 2 , which have connections to visitor locations registers (VLRs) VLR 1  and VLR 2 , and with a home location register HLR. Additionally, the system also includes base station systems (BSSs) BSS 1  and BSS 2 . Also shown are mobile terminals MS 1  and MS 2 . Mobile terminals MS 1  and MS 2  may be, for example, a cellular phone. Additionally, MSC 1  is coupled to the public switched fixed line communications system  102 . Also located in system  101  is a name database  200 . Even though only two mobile switching centers, two visitor location registers, one home location register, two terminals etc, are illustrated in  FIG. 2 , it is understood by a person skilled in the art that a mobile communications system, such as the one illustrated, may include more of them. 
         [0022]    MSC 1  performs switching of a call from the public switched fixed line communications system  102  and vice versa as well as switching a call to another mobile terminal. MSC 1  and MSC 2  also validate mobile terminals MS 1  and MS 2  to determine whether the user using those stations is a resident of the system or a roamer by using the visitor location registers VLR 1  and VLR 2  respectively and home locations register HLR. VLR 1  and VLR 2  are functional units that dynamically store user information, such as location area, when the user is located in the area covered by a particular VLR. When a roaming mobile terminal enters an area controlled by an MSC, the MSC informs the associated VLR about the mobile terminal and initiates a registration procedure for the mobile terminal. The HLR is a functional unit used for management of mobile users. User information such as VLR address, mobile station, subscriber number are stored within the HLR. The name database  200  is used by MSCs to perform queries in order to associate an identity of a user to a calling number, whenever a procedure to establish a call is received at the MSCs. When a user leaves the area controlled by a particular MSC, the associated VLR will remove the user information of that particular user that has left the area. 
         [0023]    According to the invention, in order to reduce the set up time of a call, querying the name database is removed. 
         [0024]    An illustrative embodiment of the technique is shown in  FIGS. 3   a ,  3   b , and  3   c , wherein message flow diagram showing the different steps required are displayed. 
         [0025]    In  FIG. 3   a , a user (calling party) registers the identity, for example a calling name it wants communicated and displayed at a called party, when establishing a call. 
         [0026]    The mobile terminal MS 1  used by the user will communicate with its controlling MSC 1  via a channel and indicate that it wishes to register an identity (A). This is done by transmitting a message (M) that includes the identity (A). The user has the ability to modify the identity (A) as many times as the user wants, and to effect these modifications at any point in time. There is no limit to the number of modifications allowed nor is there a specific time instance, for example when the user switches on the terminal and connects to the network provider, that a modification of the identity (A) is permitted. 
         [0027]    The MSC 1  in turn transfers the identity (A) to the corresponding VLR 1 , which in turn will transfer the identity (A) to the HLR where it will be registered and stored in a database ( 25 ). In each step there is a return acknowledgement message transmitted to the emitting entity, in this case mobile terminal MS 1 . The final acknowledgement between the MSC 1  and MS 1  indicates that the registration has been executed and that the channel is to be released. 
         [0028]    On the occasion that a user registers the identity (A), this is executed using an Unstructured Supplementary Services Data (USSD) string. Alternatively, a user can use a Subscriber Identity Module (SIM) toolkit application (SAM). The HLR has the ability to decode the USSD string and recognize that an identity (A) has been received for registration. The same applies when the SIM toolkit application is used. 
         [0029]    Additionally, the HLR performs an internal step of removing upon reception of an identity (A) in a message (M) to be registered, any previously registered identity (A). In this way, one identity (A) is registered at any one time, simplifying the management of associating identities, for example names with numbers, and the also reducing the size of the database. 
         [0030]    Once the identity (A) has been registered, the HLR downloads the identity (A) to the VLR at which the mobile terminal is currently registered with. In the event that the mobile terminal is roaming and moves from one MSC to another MSC and therefore a location update is necessary, the HLR transfers the identity (A) to the new VLR upon reception of a location update message. The download of the identity (A) is done using an Insert Subscriber Data Message. Once the mobile terminal has left the old MSC, the user information stored at the old VLR which includes the identity (A) is removed. The above can be seen in  FIG. 3   b.    
         [0031]      FIG. 3   c  shows a message flow diagram depicting the steps performed in order to set up the call and provide the called party with the calling party&#39;s identity (A). MS 1  communicates with MSC 1  a request to initiate a call establishment with MS 2 . MSC 1  then communicates with VLR 1  requesting information about the user (MS 1 ) who is initiating the call. The VLR provides the required information which includes the identity of MS 1 . MSC 1  then proceeds to communicate with MSC 2  requesting the establishment of a call to MS 2  and provides MS 2  with the identity (A) and calling number of MS 1 . MSC 2 , in turn, communicates with VLR 2  requesting information about the user MS 2 . Upon reception of this information, MSC 2  establishes the call to MS 2  and provides the identity (A) to MS 2 . Advantageously, compared with the prior art technique, shown in  FIG. 1 , MSC 2  does not have to perform any name database query regarding MS 1 . MSC 1  has already provided this information. This information is retrieved from a smaller set of information stored on the VLR in a database ( 35 ) that the mobile terminal is currently located at, thus reducing the amount of time necessary to retrieve the information. All that MSC 2  has to perform is the standard query to VLR 2  concerning MS 2 . During this query, MSC 2  ascertains whether MS 2 , has the service allowing the display of identities enabled. If the query returns a positive answer then the identity (A) is displayed. If the answer is negative then only the calling number is displayed. 
         [0032]    A further advantage in the event of a negative answer is that MSC 2  does not have to perform any further query as in the prior art. MSC 2  concerns itself simply with the mobile station under its control. Therefore, reducing the amount of time necessary for retrieving identity (A) information and thus, reducing the overall amount of time necessary for the establishment of the call. 
         [0033]      FIGS. 4 and 5 , show a block diagram of different entities that comprise the system and their interrelationship. MS 1   10  and MS 2   10 ′, both comprise an input device  11 , for example the keypad of a mobile phone or a camera, adapted to allow a subscriber to modify his identity (A), i.e. calling name or photograph, and are connected to a registering device  12 . The registering device  12  is adapted to communicate and transmit a message (M), including the identity (A) via a Visitor Location Register  30  to a Home Location Register  20 . The registering device is adapted to use an Unstructured Supplementary Services Data (USSD) string or a Subscriber Identity Module (SIM) toolkit application (SAM) to transmit the identity. The Visitor Location Register  30  has a communication device  31  adapted to forward the message (M) to the Home Location Registry  40 . 
         [0034]    The HLR  20  has a receiving device  21  for receiving messages transmitted to the HLR  20  that are adapted to decode a USSD string or a SIM toolkit application and recognize that an identity of a user has been received for registration. The receiving device  21  is also adapted to verify whether there exists a previously registered identity and if there is one such registered identity to remove it. HLR  20 , also comprises of a storage device  25 , such as a database or memory chip, adapted to store the registered identity. The HLR  20  further comprises a downloading device  24  that is adapted to download the stored identity to the VLR  30 . This is executed under the command of a central unit  23 , which is in control of the HLR  20 . 
         [0035]    The VLR  30  or any other VLR that is located within the network comprises of the aforementioned communication device  31 , as well as with a storage device  32 , such as a database or memory chip, adapted to store the identity downloaded from the HLR  20 . The communication device  31  is also adapted to receive and transmit messages to and from the VLR  30 . The VLR  30  also comprises a central unit  33  also connected to the storage device  32 , that are adapted to receive information requests from MSCs regarding mobile terminals currently located with the MSCs and providing, after retrieving the information from the storage device  32  the requested information. 
         [0036]    MS 1   10  and MS 2   10 ′ also have an initiating device  13  which is adapted to initiate the establishment of a call to a caller party via MSC 1   50  and MSC 2   50 , respectively. The MSCs comprise of an establishing device  51  adapted to receive a message from the initiating device  13 , a retrieving device  52  adapted to communicate with the VLR  30  and request information about mobile terminals. They also comprise of transmit/receive device  53  adapted to receive and transmit any messages, such as those indicating a registration to the VLR  30 . 
         [0037]    Although the invention has been described in terms of a preferred embodiment described herein, those skilled in the art will appreciate other embodiments and modifications which can be made without departing from the scope of the teachings of the invention. All such modifications are intended to be included within the scope of the claims appended hereto.

Technology Category: h