Abstract:
The invention concerns a method and a device for requesting subscriber communication to a communication system. Said communication system comprises a communication terminal having a first transmission/reception unit for a radio interface and a portable device having a second transmission/reception unit for the radio interface, for data exchange. Data concerning an authentication of the subscriber are exchanged through the radio interface. Once authentication is successfully completed, the subscriber request for communication with the communication system is granted.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS  
       [0001]    This application is the US National Stage of International Application No. PCT/DE02/03304, filed Sep. 6, 2002 and claims the benefit thereof. The International Application claims the benefits of German application No. 10147896.8 DE filed Sep. 28, 2001, both of the applications are incorporated by reference herein in their entirety. 
     
    
     
       FIELD OF INVENTION  
         [0002]    The invention relates to a method for authentication of a mobile subscriber in accordance with the preamble of patent claim  1 .  
         BACKGROUND OF INVENTION  
         [0003]    In many communication systems a function is provided which allows a subscriber to individualize any given communication terminal within the communication system. In contemporary communication systems such a function is known as a “mobile subscriber in a communication system” service feature. This individualization is taken to mean that, after a request for communication process has been completed at the corresponding communication terminal, a subscriber has their personal authorization, specific functions of their membership of subscriber groups, their personal detailed billing and call charge assignment and also their personal service feature arrangements available to them. After the request for communication process has been completed at this terminal all calls directed to the mobile subscriber&#39;s number are put through to this terminal.  
           [0004]    One requirement for this request for communication process is an identification of the mobile subscriber, which is made by entering a telephone number assigned to the mobile subscriber for example. A further component of the request for communication process is an authorization of the mobile subscriber, which is undertaken by a subsequent entry of a personal identification number (“PIN”) for example. Instead of entry of the identification information and PIN many telecommunication terminals also support an authentication by means of a smart card belonging to the mobile subscriber.  
           [0005]    There are known methods for a wireless communication terminal to request communication at a communication system. A method an means for setting up a cellular communication system using a number of local wireless networks is published in WO 00/69186 A1. In this a wireless unit is registered in the local wireless network by a switching station being found in the radio area of the wireless unit by running a polling and response system at regular intervals. Subsequently authorization information of the wireless unit is transferred to the switching station. After an identification and authentication of the wireless mobile unit this is registered with the communication system. This method naturally requires that the switching station is already registered in the communication, or as a fixed component of this communication system has no need for authorization.  
           [0006]    WO 99/09688 A1 discloses a method and means for embodying a through connection path for a communication link in which a first signaling connection between a mobile communication terminal and a wired communication terminal and, as a result, a second signaling connection between the wired communication terminal and a base station is embodied, with mobility-related signaling information being exchanged over the two signaling connections.  
           [0007]    From DE 195 48 394 A1 a method is known for setting of preference information by a generator device, such as a memory card or a widely-available database for example.  
           [0008]    From publication Allerbeck, M. et al.: “Mobile communication with the HICOM smart card”, in: telecom report 9, 1986, Volume 4. Pages 270 to 273 a method for registering a subscriber at a communication system is known, with a communication terminal assigned to the communication system, which can be assigned to the subscriber through the registration as well as a smart card for transmitting data to authenticate the subscriber  
         SUMMARY OF INVENTION  
         [0009]    One object of the invention is to specify a method of simplifying this request for communication process for a mobile subscriber while retaining a secure authentication.  
           [0010]    The object is achieved by the features of patent claim  1  or  10 .  
           [0011]    In accordance with the invention the request for communication process comprises the exchange, over an air interface, of authentication information between the communication terminal and an individual portable device belonging to the subscriber.  
           [0012]    A significant advantage of the method in accordance with the invention can be seen in the fact that it dispenses with the entry of authentication information which is long-winded and susceptible to errors or the tedious use of a smart card. Instead, the advantageous use of an air interface makes the request for communication process much simpler so that the mobile subscriber places their portable device in the vicinity of the air interface and the request for communication process proceeds without the need for any further action by the mobile subscriber. The air interface can be embodied here to support an optical exchange of data—e.g. over an infrared interface—or via an exchange of data in an invisible electromagnetic wavelength.  
           [0013]    Advantageous developments of the invention are specified in the subclaims.  
           [0014]    The use of portable devices which require authentication of the user to be put into operation provides an advantageous security for the mobile subscriber against misuse in the case of loss of the individual portable device assigned to them. Typical portable devices requiring an authentication of the user to put them into operation are mobile computers such as notebooks, PDAs (Personal  
           [0015]    Digital Assistant), mobile communication terminals etc. These types of portable units are carried around almost all the time by a growing number of people, and the fact that they require authentication to be put into operation offers greater authentication security for mobile subscribers.  
           [0016]    An advantageous embodiment of the air interface in accordance with the “Bluetooth” Standard produces an advantageous use of a standardized infrastructure which is increasingly employed for electronic devices with communication interfaces. In addition the use of Bluetooth enables data to be exchanged in the microwave range so that the design of the air interface is not restricted to placing the communication partners in immediate visible contact.  
           [0017]    An especially advantageous embodiment of the invention is the equipping of the portable unit with functionalities of a mobile communication terminal. With this type of embodiment not only the authentication of the mobile subscriber, but also communication with the aid of the portable unit is guaranteed. In this way a mobile subscriber can, by carrying with them a mobile telephone—e.g. equipped with a GSM interface and a Bluetooth interface—move around as they please within a communication system designed in accordance with the invention, e.g. at a workstation of a person having a communication terminal embodied in accordance with the invention, at which they can advantageously request communication, without entering authorization information or using a smart card. Advantageously this mobile subscriber can use their mobile telephone instead of the communication terminal of the other person for incoming or outgoing communication connections.  
           [0018]    With the advantageous use of two basic channels for exchanging payload data of the communication terminal with a communication unit both the mobile subscriber and also the subscriber with the communication terminal can communicate simultaneously. 
       
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0019]    An exemplary embodiment of the invention is explained in more detail below on the basis of the drawing.  
         [0020]    The diagrams show:  
         [0021]    [0021]FIG. 1: a structure diagram for schematic representation of a communication system in accordance with the invention; and  
         [0022]    [0022]FIG. 2: a structure diagram for schematic representation of communication in the communication system in accordance with the invention. 
     
    
     DETAILED DESCRIPTION OF INVENTION  
       [0023]    [0023]FIG. 1 shows a communication system KS with a communication unit PBX, a communication terminal KE 1  and a portable unit PE communicating over an air interface BT with the communication terminal KE 1 . The communication system operates for example in accordance with a standard known to experts as ISDN (Integrated Services Digital Network).  
         [0024]    There is bidirectional data transmission over the air interface BT between a first transceiver unit SE assigned to the communication terminal KE 1  I and a second transceiver unit SE 1  assigned to the portable unit PE. As in the exemplary embodiment, this air interface can be designed in accordance with an embodiment familiar to the expert as the Bluetooth Standard as a radio interface or also in accordance with an embodiment familiar to the expert as the IrDA Standard (Infrared Data Association) as an optical interface.  
         [0025]    The communication device PBX operates in accordance with a time-slot-oriented switching principle—often referred to among experts as “Time Division Multiplex”, TDM—and accordingly has a corresponding TDM switching matrix. A Line L of the communication terminal KE 1  transmitting payload or signaling information is connected via a Line/Trunk Unit LTU assigned to the communication device PBX to the switching matrix TDM or to a coordination processor CP—a further central component of the communication device PBX.  
         [0026]    Signaling information corresponds to data which, with an ISDN connection for example, is transmitted over what is referred to as a D channel—not shown—and contains data for connection control, signaling etc. A further component of the data exchanged between the communication terminal KE 1  and the switching device PBX is the payload information which contains voice and/or video communication data for example. In an ISDN communication system KS this payload information is transmitted over one or more B channels—not shown.  
         [0027]    In the ISDN-based communication system KS the communication unit KE 1  is linked via the line L with two B channels to the line/trunk unit.  
         [0028]    In the coordination processor CP a number of software functional modules MD—for handling connection control, service feature processes and such like—are administered. A service feature “mobile subscriber in a communication system” which can be called up in a communication system KS is processed in the coordination processor CP by calling the software module Mobile Subscriber MT.  
         [0029]    A mobile subscriber carrying the portable unit PE with them is located in the vicinity of the communication terminal KE 1 . The portable unit PE is for example realized in an embodiment as a mobile communication terminal or also as a Per sonal Digital Assistant (PDA).  
         [0030]    In the present exemplary embodiment the portable unit PE includes functionalities of a mobile communication terminal. As shown by the handset symbol as an element of the portable unit PE in the drawing, these functionalities also include provision of an audible input and output of information.  
         [0031]    The sequence of a process for requesting communication by the mobile subscriber at the communication system KS is described below.  
         [0032]    By pressing an input element—not shown—on their portable unit PE or on the communication terminal KE 1 , the mobile subscriber activates the service feature “Mobile subscriber in a communication system”. In the portable unit PE a request containing subscriber identification and authorization data is then generated automatically. This request is transferred over the air interface BT to the communication terminal KE 1  and sent as signaling information over the line L to the coordination processor CP. In the coordination processor CP the software module Mobile Subscriber MT is called, which uses the identification and authorization data transmitted from a portable unit to check authorizations of the mobile subscriber in the communication system KS. After the authenticity of the mobile subscriber is ensured, their personal authorizations, specific functions of their membership of subscriber groups, their personal detailed billing and call charge recording assignment as well as their personal service feature arrangements are created at the communication terminal KE 1 . In addition all calls directed to the mobile subscriber&#39;s number are put through to this communication terminal KE 1 . FIG. 2 shows a communication system KS with the communication device PBX, the communication terminal KE 1  and the portable unit PE communicating over an air interface BT with the communication terminal KE 1 . The first communication terminal KE 1  is linked by a first communication connection B 1  to a second communication terminal KE 2 . In addition to this first communication link B 1 —shown as a dashed line—a second communication link B 2 —shown as a dashed line—is switched via the two B channels available at the first communication terminal KE 1  between the first communication terminal KE 3  and a third communication terminal KE 3  through the communication device PBX. At the first communication terminal KE 1  the payload data belonging to this second communication connection B 2  is exchanged over the air interface BT with the portable unit PE.  
         [0033]    By connecting the first communication terminal KE 1  to the communication unit PBX via two radio channels the portable unit PE is thus available independently of a use of the first communication terminal KE 1  for incoming or outgoing communication connections B 2 .  
         [0034]    If the communication terminal KE 1  in a further form of embodiment—not shown—is only connected via one channel to the communication unit PBX, the first communication terminal KE 1  is blocked during an existing communication connection B 2  of the portable unit PE for incoming or outgoing communication connections.