Abstract:
A method and system for providing harmonized public security and safety services to multiple public security and safety control centers, the public security and safety control centers being adapted to control terminals over at least one access communication network. The method includes the following steps: providing multiple public security and safety control centers access to a service platform, with the service platform containing an application server layer and a communication layer; upon service request of one of the public security and safety control centers, executing a corresponding application on the application server layer of the service platform, the application generating at least one command to be executed in one of the access communication networks; forwarding the command said the communication layer to the appropriate gateway and executing the command in the access communication network.

Description:
BACKGROUND OF THE INVENTION 
   The invention is based on a priority application EP 05003502.1 which is hereby incorporated by reference. 
   The present invention relates to a method for providing harmonized public security and safety services to a plurality of public security and safety control centers. 
   The communication tools used by security and safety services as police, fire departments, rescue services have to be efficient in order to react as soon as possible to emergency and involve in the communication the whole team which needs to intervene in the field. 
   Examples of services that such communication tools must be able to provide can be:
         Receiving emergency calls and triggering broadcast calls to a pre-selected group of professionals located in the neighborhood of the person having placed the emergency call.   Alarming a group of professionals over a plurality of possible communication devices (dedicated radio terminal, public mobile phone, pager).   Making group calls for a group of professionals to be kept on the same level of information, and possibly defining a coordinator who has priority in the group call.   Sending and receiving Short Data Messages containing information relevant for the professionals in the field.       

   These communication tools usually comprise a plurality of public security and safety control centers which are connected to a dedicated Professional Mobile Radio (PMR) network. Up to the last decade such PMR networks were most analog and not interconnected. Each region and each security and safety organization had its own PMR. Due to political decisions, the trend is now to equip the different European countries with digital PMR networks and to provide a “unifying” infrastructure capable of interconnecting multiple organizations or of interoperating at borders with other national networks in order to enhance the mutual cooperation between European countries. 
   The digital PMR networks are usually based on one of the following technologies: TETRA (Terrestrial Trunked Radio), TETRAPOL, GSM with ASCI features. 
   The current PMR landscape is a juxtaposition of heterogeneous technologies as analog PMR coexists with digital ones compatible to different standards.  FIG. 1  illustrates the state of the art PMR landscape.  FIG. 1  represent a plurality of islands of control centers CO 1 , . . . , CO 4  each island of control centers being associated to one organization for example CO 1  groups control centers of the fire department, CO 2  central centers of the police region  1  and CO 3  central centers of the police region  2  and CO 4  central centers of emergency services. 
   Each island of central centers are relying on one or more transport technologies. For example, CO 1  is connected to an analog PMR, CO 2  to a TETRA PMR and a paging network, CO 3  to a GSM/UMTS PMR and CO 4  to a WLAN network. 
   A drawback of the current situation is that the services implemented at the control centers must be adapted to the underlying transport network in order to work. An application working in a TETRA PMR cannot be ported to another type of PMR without expensive and time intensive adaptation or replacement. The PMR are proprietary solutions without unifying a network between the control centers is the latter are not relying on the same transport technology. As a consequence, harmonized services may remain a cost intensive burden. 
   A particular object of the present invention is to provide a method for providing harmonized public security and safety services over a plurality of access communication networks. 
   Another object of the invention is to provide a corresponding service platform. 
   SUMMARY OF THE INVENTION 
   These objects, and others that appear below, are achieved by a method for providing harmonized public security and safety services over a plurality of access communication networks according to claim  1 , and a service platform according to claim  10 . 
   According to the present invention, the method for providing harmonized public security and safety services over a plurality of access communication networks relies on the fact that a service platform accessible by the control centers comprises on the one hand an application server layer gathering the applications for providing a plurality of predefined services and on the other hand a communication layer for selecting the appropriate access communication network on which the service should be performed. 
   The method according to the present invention presents the advantage to reduce the burden to adapt services to the different access communication network technologies. The adaptation is only to be performed on the service platform and no more on each control center. 
   The method according to the present invention further presents the advantage to ease the transfer of service used up to now in one organization to other organizations since all services will be accessible from the service platform by all the control centers. 
   Further advantageous features of the invention are defined in the dependent claims. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Other characteristics and advantages of the invention will appear on reading the following description of a preferred embodiment given by way of non-limiting illustrations, and from the accompanying drawings, in which: 
       FIG. 1  shows an illustration of the current PMR landscape; 
       FIG. 2  shows an illustration of public safety and security networks according to the present invention; 
       FIG. 3  shows an hierarchical representation of the service platform for harmonized service provision according to the present invention. 
   

   DETAILED DESCRIPTION OF THE INVENTION 
     FIG. 1  has already been described in relation with the prior art. 
     FIG. 2  shows an illustration of public safety and security networks according to the present invention. The public safety and security networks landscape according to the present invention comprises islands of control centers  21 ,  22 , single control centers  22 ,  23 , a service platform  25  and a plurality of access communication networks  26 . 
   The islands of control centers  21 ,  22  may comprise several control centers associated to one organization as reflected in prior art. Other control centers  23 ,  24  may be new control centers adopted to the feature of the present invention and designed for supra-organization control. To summarize, the present invention can be used with existing control center infrastructures as well as with new control centers which would take into account the features of the present invention. In the framework of the present invention control centers  24  may be mobile control centers for example established on board of a vehicle and connected over a radio link to a radio communication network  26 . 
   The island of control centers  21 ,  22  respectively control centers  23 ,  24  are logically connected to a service platform  25  which comprises a application server layer and a communication layer. Service platform  25  as well as its logical connections will be described in details in connection with  FIG. 3 . 
   The service platform  25  is as well logically connected to a plurality of access communication networks  26  which may be, on the one hand, radio communication networks as analog PMR, digital PMR based on TETRA, TETRAPOL, GSM/UMTS, Wireless Broadband Access technologies or Digital Audio Broadcast (DAB) networks. On the other hand, the access communication networks may be fixed access communication networks as PSTN/ISDN, ADSL. Further the access networks may be pager networks. 
   It will be understood by those skilled in the art that this enumeration is not to be seen as restrictive but any other known access communication networks may be used in combination with the method according to the present invention. 
     FIG. 3  shows an hierarchical representation of the service platform for harmonized service provision according to the present invention. 
   The access of control centers  21 , . . . ,  24  to the application server layer  33  is performed as follows: 
   The control center  21 , . . . ,  24  generates a service request. The service request should be selected out of a set of available service requests. Possible service request may be the request to establish a group call, the request for alarming a predefined person, the request for location based alarming, the request for providing graphical data to a set of persons, and so on. 
   For sending the service request, the control centers  21 , . . . ,  24  establishes a connection to the gateway  31  of one access network  26 . Preferably, if the control center  21 , . . . ,  24  is part of an existing PMR working over one access technology, the gateway to this PMR will be addressed. In case of evolved multi-standard control centers, which may be envisaged in the framework of the present invention, any one of gateway  31  to one supported access technology  26  may be addressed. 
   Then, gateway  31  forwards the service requests to the communication layer  32 . Communication layer  32  comprises preferably one or more packet-oriented transport domains with entities  321 ,  322  for media/data and signaling processing and switching functionality. 
   The communication layer selects the appropriate application server  331 , . . . ,  333  for sending the service request. 
   Preferably, the gateway  31  comprises a table indicating to which communication layer domain  321 ,  322  it should forward the service request depending on the originator of the service request. 
   The same way the communication layer domain  321 ,  322  comprises a table for selecting the appropriate application layer  331 , . . . ,  333  for handling the service request. The originator address but also the type of request may be considered for determining the appropriate application server  331 , . . . ,  333 . 
   Then, the application server  331 , . . . ,  333  executes the request. For this purpose, it may interrogate a common database as for example a GIS (Geographical Information Service) database, a database comprising fingerprint information and so on. The application server  331 , . . . ,  333  may also interrogate further centralized servers for example a unified identity management module which comprises user profiles defining inter alia the user rights, the user contact possibility . . . . Other feature of the application servers  331 , . . . ,  333  may be contact center applications, workflow management, workforce management, encryption. 
   The databases, as well as the applications running on the application servers are preferably distributed in the whole application layer. The most critical may also be replicated. The application layer comprises also self healing mechanisms which enables it to recover when an equipment of the application layer has failed. 
   The result of the request execution is a list of commands which are directed to the access networks  26 . The command are forwarded to the communication layer  32  which forward them to the different gateways  31 . The gateways  31  then take care for the execution of the commands in the respective access networks  26 . For example, the result of a group call request will be a list of calls to be performed in different access communication networks  26 . Some calls could be performed on the PMR network for persons on duty having their dedicated emergency terminal  341  activated and some other calls could be performed on the GSM network because some other persons are registered in the unified identity management module as currently not on duty and more likely to have their GSM mobile phone  342  active than their emergency terminal  341 . 
   In a preferred embodiment of the present invention, the terminal  341 ,  342  themselves may also be able to place a service request so that they can be granted access to an application server  331 , . . . ,  333  after an authentication procedure. The service request is forwarded over the gateway  31  and the communication layer  32  to the application server  331 , . . .  333 . The result of the execution is a command to be executed on the access communication network  26 . This command can either be destined to terminals  341 ,  342  or to control centers  21 , . . . ,  24 . 
   In another preferred embodiment of the present invention, the application server  331 , . . . ,  333  is responsible for providing a feedback tracking the execution of the list of command to the entity which had generated the service request e.g. control center  21 , . . . ,  24  or terminals  341 ,  342 . 
   In still another preferred embodiment of the present invention, an intelligent border element  35  located in the communication layer is responsible for managing clusters which associate a set of control centers  21 , . . . ,  24  to a set of applications in the application server layer  33  so that in usual operation mode the different security and safety organizations can work on separate domain of the application server layer  33  while using the same access communication network infrastructures  26 . Indeed, for regulatory reasons, it is for example necessary that the police department applications cannot be accessed by the fire department users. 
   Another feature of the intelligent border element  35  would be to manage a disaster operation mode in which the separation between the different domains is removed for a time in order to ease the communication between the different security and safety organizations. In such a case, all control centers  21 , . . . ,  24  and users would share the same applications and the coordination will be much more efficient. Intelligent border element  35  controls an on-demand collaboration between domains of the application server layer  33 . 
   In still another preferred embodiment of the present invention, the application server layer comprises a presentation server adapted to control the user interface for a plurality of users, the users being either control centers  21 , . . . ,  24  or terminals  341 ,  342 . As a consequence, the information displayed on the terminals or on the control centers are defined at the presentation server. Terminals belonging to different access communications networks  26  can have the same template of information displayed on their screen. 
   The presentation server comprises also means for dynamically building groups of users upon occurrence of an emergency situation. 
   Furthermore, the presentation layer may be used to configure on purpose a terminal as having the functionality of a control center or the other way round a control center as having the functionality of a terminal. 
   The presentation server is in the application server layer the pendant to the intelligent border element in the communication layer. The presentation server enables it flexibly and on-purpose create new and adequate configurations in the network.