Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L12/00—Data switching networks
  • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
  • H04L12/2854—Wide area networks, e.g. public data networks
  • H04L12/2856—Access arrangements, e.g. Internet access
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W24/00—Supervisory, monitoring or testing arrangements
  • H04W24/02—Arrangements for optimising operational condition
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W24/00—Supervisory, monitoring or testing arrangements
  • H04W24/04—Arrangements for maintaining operational condition
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
  • H04W16/18—Network planning tools
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W28/00—Network traffic management; Network resource management
  • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
  • H04W28/18—Negotiating wireless communication parameters
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
  • H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
  • H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W84/00—Network topologies
  • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
  • H04W84/04—Large scale networks; Deep hierarchical networks
  • H04W84/042—Public Land Mobile systems, e.g. cellular systems
  • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

• the present invention relates to a method for configuring a parameter of a terminal of access to a service.
• the present invention also relates to a controller of a terminal for access to a service implementing such a method.
• the present invention also relates to a terminal for access to a service able to issue a configuration request to such a controller.
• the present invention also relates to a service access network implementing such a controller.
• the present invention finally relates to a computer program implementing the method when it is executed by a processor.
• second or third generation communication systems such as GSM, GPRS or UMTS systems, as well as their evolutions.
• a mobile telephone network for example of the Universal Mobile Telecommunications System (UMTS) type, is conventionally constituted of a radio access network, comprising a plurality of public access terminals, called stations. basic, and a core network, which manages the service offered and the routing of communications to fixed networks such as the public fixed telephony network, the Internet, etc.
• UMTS Universal Mobile Telecommunications System
• Such a mobile telephone network is generally organized in cells, each associated with a base station, and which are of variable size depending on the density of users, the geography of the terrain, the power of the associated base station etc.
• SC scrambling codes SC scrambling codes
• PLMN Public Land Mobile Network
• a mobile terminal can only access the mobile network managed by the operator from which it has subscribed, or possibly to another network with which its operator has reciprocal roaming agreements (or roaming).
• the mobile terminal After being connected to an authorized PLMN network, the mobile terminal listens for the signals from the various access terminals it receives, selects the received signal of better quality, and attaches to the cell from which it comes; the Location Area Code (LAC), code assigned to a cell or group of cells and used to manage the mobility of a user terminal. This code defines a location area (in English, "Location Area”).
• the LAC code has 65536 possible values
• the Service Area Code (SAC) code assigned to a cell or a group of cells and used to define a service area (in English, "Service Area”).
• the SAC code has 65536 possible values.
• the service areas have been introduced in UMTS in order to allow independence between the cellular coverage or AS layer (in English, “Access Stratum”) and the NAS layer (in English, “Non Access Stratum”) offering services to the mobile terminal. .
• AS layer in English, "Access Stratum”
• NAS layer in English, “Non Access Stratum”
• the definition of a broadcasting zone is not linked to the radio coverage criteria but to the notion of geographical area, and the determination of the cells concerned. by the diffusion of the information is then carried out in the access network "macroscopic” or UTRAN (in English, "Universal Terrestrial Radio Access Network ”) in the case of UMTS In GSM, the broadcast was based on the cells, which did not allow an independence between the service layer and the access layer, and some limitations were identified.
• service area defined by the concept of "Service Area” allows to define a geographical area, regardless of the number of 3G cells in this area.
• LAI Local Area Identifier
• SAI Service Area Identifier
• a UMTS network for example, such a parameter is used by services based on the location of the mobile terminal, such as routing an emergency call to the nearest local emergency treatment center. It is also possible to use the location information provided by this SAI parameter in other use cases; for example a service allowing a user to find the cinemas closest to him from his current location. To do this, the value of the mobile subscriber's SAI is retrieved at the network level, translated into geographical area, which correlated can also be cited as an example of use of the service areas.
• a disadvantage of a conventional access network according to the prior art is that, to be taken into account by the network during its installation, a new access point must necessarily have been planned and therefore configured beforehand.
• the current development of mobile communication networks is now focused on providing convergence services between fixed telephony networks (such as the public switched telephone network (“PSTN”) or the Internet) and mobile networks.
• PSTN public switched telephone network
• radio coverage second 2G, third generation 3G or beyond B3G
• second 2G, third generation 3G or beyond B3G radio coverage
• a modem offering high-speed access for example of the ADSL type (for "Asynchronous Digital Subscriber One") or to any other equipment access to a broadband network (for example FTTH type for "Fiber To The Home").
• ADSL type for "Asynchronous Digital Subscriber One”
• FTTH broadband network
• private radio access terminal designates the assembly constituted by the access terminal itself and the access equipment to a high-speed network to which it is connected.
• Each individual could have his own home radio access point, which would cover his apartment or house.
• a company could have one or more radio access points located on its site to cover its premises.
• an access control system may possibly be set up to restrict access to the terminal's radio coverage to a set of users (for example family, friends, employees of the company ).
• the object of the invention is in particular to overcome these drawbacks of the art prior.
• the invention also aims to propose a method of configuring a service access terminal in an access network that adapts easily to the multiplication of private access terminals.
• the invention satisfies this need by means of a method of configuring a parameter SAI of a radio access terminal to a service provided by a communication network.
• the method according to the invention is particular in that, the service being accessible via a plurality of radio terminals forming an access network to said communication network, said method comprises:
• the invention solves the technical problem of configuring the SAI parameter of an access terminal to an unscheduled service in the access network.
• a newly installed and unplanned radio terminal transmits to a network controller a configuration request of its SAI parameter.
• Said request includes an indication of the location of the radio terminal.
• This location indication can not only geographically locate the radio terminal in question, but also define its environment, particularly in terms of location and / or configuration of neighboring radio terminals.
• the controller assigns to said radio terminal a SAI parameter value satisfying at least one constraint related to its location. It begins by assigning a geographical area to the radio terminal from the location indication.
• the SAI parameter is used for the implementation of services based on the location of the user terminal or for the routing of an emergency call to a local emergency treatment center.
• an ISA is referred to as a local processing center.
• a first constraint of the communication network is that the number of possible SAI values for a geographical area is limited. The fact that a given geographical area is attached to a local emergency treatment center ensures that all emergency calls from the private access points installed in the geographical area will be routed to this local treatment center. emergencies.
• a second constraint imposes to allocate a value to the SAI parameter that makes it possible to uniquely identify a radio terminal in the geographical area of a given PLMN.
• a problem related to this second constraint comes from the fact that the number of possible values of the SAI parameter provided by the communication network is limited. In case of multiplication of the number of radio terminals in a geographical area, the maximum number of possible values defined by the communication network may be quickly reached and insufficient to satisfy this second constraint.
• pseudo values are used which satisfy the second constraint and which will only be used during exchanges between the plurality of radio terminals and the controller. These pseudo-values are then converted by the controller into a value of the SAI parameter satisfying the first constraint, that is to say being selected from a list of possible values defined by the communication network for said geographical area.
• One advantage is that it is not necessary to increase the number of possible values defined by the communication network. We can satisfy simultaneously the first and the second constraint without overloading its resources.
• a second advantage is that the configuration of the radio terminal has no impact on the operation of the communication network, and in particular on that of the core network, which is particularly interesting because the changes on the core network are to be limited. for reasons of operation and maintenance. In particular, certain modifications can not be performed dynamically, this requires the operator to pre-configure the nodes with a finite and limited number of expected values.
• the invention thus makes it possible to dynamically configure the SAI parameter of a newly installed radio terminal by taking into account its geographical location. It also makes it possible to reconfigure periodically a radio terminal whose geographical environment is likely to be frequently changed, for example by the installation of new radio terminals.
• An advantage of the periodic reconfiguration is that it makes it possible to harmonize the allocation of the configuration parameter values in the access network by taking into account the environmental modifications of the terminal.
• the invention applies in particular to residential private radio terminals of the second 2G, third generation 3G or beyond B3G previously mentioned and the (x) controller (s) constituting gateway to the mobile communication network. It can also be applied to the radio terminals of the "macroscopic" network of an operator, who no longer wishes to preconfigure the new radio terminals that he installs.
• the dynamic allocation step comprises a substep of querying a local database, said database comprising a list of pseudo-values available for the parameter SAI in said geographical area, a sub-step of selecting a pseudo-value to allocating to said radio terminal from said list of pseudo-values available and a step of updating the list for deleting the selected pseudo value from said list.
• One advantage is that the database maintains a list of up-to-date pseudo-values.
• the conversion step comprises a substep of querying a database, said database comprising a conversion table of said pseudo-value into the possible value selected for said parameter in said geographical zone.
• controller knows how to match the pseudo-value used between the radio terminal and the controller to an SAI parameter value that satisfies the first constraint. It is this value that is seen by the network in the request transmitted by the controller.
• the configuration method further comprises the following features:
• said allocation step satisfies a third constraint imposing a single occurrence of said value of said parameter among the private terminals adjacent to said radio terminal in said geographical zone;
• said allocation step comprises a substep of recovering the values allocated to the radio terminals close to said terminal and a substep of updating the list of possible values for said radio terminal intended to suppress said values close to said terminal; listing.
• This third constraint relates in particular to the parameter LAC, which is likely to be used by an access control mechanism and must, as such, uniquely identify a radio terminal with respect to its neighbors.
• LAC parameterized with a separate LA parameter, at least for neighboring radio terminals (it is indeed possible to tolerate two radio access terminals distant from one another having the same location area).
• a location update procedure or "Location Area Update”
• the network then knows exactly which terminal the subscriber is located on. Without this constraint, the mobile terminal could attach to neighboring terminals without the network being notified.
• the recovery sub-step may be implemented by the radio terminal itself, which listens to the messages broadcast by the neighboring radio terminals, and then transmits them to an entity of the network, for example to the controller.
• Such messages include the values of configuration parameters, such as the LAC parameter for type 2G or 3G radio terminals or the SC parameter for type 3G terminals.
• the recovery sub-step can also be implemented by the controller, which interrogates the neighboring radio terminals on the configuration parameter values that have been assigned to them.
• the controller interrogates the neighboring radio terminals on the configuration parameter values that have been assigned to them.
• parameters like the SAC, whose values are not diffused by neighboring terminals.
• the controller needs to receive prior indications on the location of neighboring terminals, for example from the terminal that made the configuration request.
• the recovery of the values of the parameters allocated to the radio terminals adjacent to the radio terminal awaiting configuration makes it possible to update the list of possible values of the parameter provided by the local database.
• the process according to the invention is particular in that:
• said allocation step satisfies a fourth constraint imposing a homogeneous distribution of the instances of said value of said parameter among the radio terminals adjacent to said radio terminal in said geographical zone;
• said list indicates a number of instances of said value for the plurality of radio terminals
• the selection sub-step selects the value for which the number of occurrences already allocated in said geographical area is the lowest.
• This fourth constraint relates in particular to the configuration of the parameter LAC and, in this particular case, is added to the third constraint. It has been seen that the location update procedure of a user terminal uses a list of the last access stations, identified by their parameter LAC, to which the user terminal has attempted to attach. It is therefore understood that the fourth constraint aims to minimize the risk that two terminals having the same parameter value LAC are simultaneously on this list.
• the substep of selection implements, for example a pseudo-random algorithm, which, from said list indicating the number of instances of a parameter value for the plurality of radio terminals installed. in the geographical area selects from this list the value for which the number of instances already allocated in said geographical area is the lowest.
• the invention also relates to a terminal controller for access to a service provided by a communication network.
• the controller according to the invention is particular in that, said access terminals being radio access terminals to a service of said network connected to said gateway constituting controller to said communication network, said controller is able to implement the means following:
• an SAI parameter comprising an indication of location of a radio terminal, assignment of a geographical area to said radio terminal from said location indication;
• This aspect of the invention relates in particular to the private terminals of type 2G or 3G previously defined. They can indeed be connected to a controller through which all the traffic passes between the private terminals and the communication network. Such a controller centralizes the dynamic configuration of all the terminals of which it has the charge. It can also be applied to public terminals of a "macroscopic" access network of an operator.
• the invention also relates to a terminal for access to a service provided by a communication network.
• Said terminal is particular in that, the service being accessible via a plurality of radio terminals connected to said communication network, said radio terminal comprises means for transmitting a configuration request of an SAI parameter comprising at least one indication of location to a gateway constituting controller to the communication network and means of receiving a pseudo-value of the SAI parameter satisfying a constraint of a single occurrence of the pseudo-value in a geographical area assigned to it from said location indication.
• controller has a global vision of the radio terminals already configured in the access network. This solution also offers the advantage of centralizing the configuration function and not complicating the radio terminals.
• the invention also relates to a network for accessing a service provided by a communication network.
• Said network is particular in that, the service being accessible via a plurality of radio terminals connected to said communication network, a radio terminal comprises means for transmitting a request for configuration of an SAI parameter comprising at least one indication of location to a gateway constituting controller to the communication network and means for receiving a pseudo-value of the parameter, said controller being able to assign a geographical area to said radio terminal from said indication of location, to allocate the pseudo-value to the parameter satisfying a constraint of a single occurrence in said geographical area and to send it to the radio terminal in response to said request.
• said private terminal transmits said configuration request to said controller and said controller implements said dynamic allocation means.
• One advantage is that the allocation is centralized for the plurality of radio terminals.
• the controller has an overall view of the parameter settings for the radio terminals it is responsible for. This centralized solution also makes it possible to avoid complicating the structure of a radio terminal.
• the invention finally relates to a computer program product downloadable from a communication network and / or stored on a computer readable medium and / or executable by a microprocessor.
• Such a computer program product is particular in that it includes program code instructions for executing the method according to the invention.
• FIG. 1 illustrates the architecture of a network of radio access terminals to a service provided by a communication network according to the invention, managed by a controller acting as a gateway between the access network dedicated to the service. residential radio coverage and the core network;
• FIG. 2 illustrates the steps of the method of configuring a parameter of a private terminal for access to a service according to the invention;
• FIG. 3 illustrates the routing of a call to a service based on the location of a user terminal from an access terminal configured by the method according to the invention;
• FIG. 4 illustrates the allocation of parameters LAC, SAC to the private terminals of a geographical zone according to one aspect of the invention.
• the general principle of the invention is based on the dynamic configuration of these services.
• private access points whose deployment and installation in a geographical area has not been planned.
• residential radio coverage is understood to mean radio coverage accessible from a private radio access terminal whose access may, in certain implementations, be restricted to certain authorized subscribers, whether in the home, associative or business.
• radio terminal refers in particular to a private access terminal, or Home Gateway HG, that is to say equipment installed in a user (individual, association or company) which includes a radio access to the user's terminal and access to the IP / DSL transport network ("Internet Protocol / Digital Subscriber One"). It can in particular be a residential gateway connected to the ADSL network, equipped with a 3G UMTS radio antenna and which includes a UMTS / IP interface module between the radio antenna and the residential gateway.
• IP / DSL transport network Internet Protocol / Digital Subscriber One
• the plurality of private terminals form a "microscopic" access network, organized in a plurality of micro cells or femto cells, which are each associated with the particular radio antenna of a residential gateway.
• radio terminal also refers to a public radio terminal for access to a "macroscopic" network of type 2G or 3G of an operator.
• Access control to these private access points is performed in a controller, which is an equipment installed at the operator, and which manages the HG private access points. All end-user traffic from the HG terminal (incoming or outgoing traffic) is managed by the controller.
• the present invention is applicable in 2G cellular networks (GSM, GPRS), 3G (UMTS) and their evolutions.
• GSM Global System for Mobile communications
• GPRS GPRS
• UMTS 3G
• the private base station can be likened to the base station BTS ("Base Transceiver Station") installed at the customer's premises, and the controller can be likened to the BSC ("Base Station Controller") controller. ).
• BTS Base Transceiver Station
• BSC Base Station Controller
• the private access point can be likened to the NodeB installed at the customer's premises. It may possibly contain features that are usually associated with entities of the 3G network, such as the RNC ("Radio Network Controller"), the MSC ("Mobile Switching Center”), or the SGSN ("Serving GPRS Support Node”).
• the controller is similar to an RNC, but may have additional features, including the access control mechanism.
• FIG. 1 illustrates the architecture of a "microscopic" access network, dedicated to a residential radio coverage service, comprising a plurality of private access terminals, three of which have been represented, which are referenced HG1, HG2 and HG3.
• the private terminals HG1 to HG3 are each connected to a controller 1 1 through an IP network 10, such as the global Internet network, or an ADSL network.
• the controller 1 1 is a gateway between the access network constituted by the private terminals HG1 to HG3, of which it is a part, and the heart network 12 of the operator, which manages the service offered and the routing of communications to fixed networks (not shown in Figure 1) such as the public fixed telephony network, the Internet, etc.
• the core network 12 comprises several conventional entities of a UMTS network, such as: a "Mobile Switching Center” MSC 121, which is a switch in charge of managing the circuit mode services of the mobile terminals 1 to 4 and 131 which are registered in the geographical area it manages; a Home Location Register HLR 122, which is a database containing information about the subscription conditions of the user and the characteristics of the subscribed services. It also contains information coarse on the location of the subscriber (such as the MSC or SGSN on which the subscriber is located); a SGSN 123 Serving GPRS Support Node which transfers data in packet mode to the Internet, to intranets or to service platforms (and vice versa). This linking takes place via a data routing gateway called "Gateway GPRS Support Node" GGSN 124.
• FIG. 1 also shows the "macroscopic" UMTS network of the operator, in the form of an access network 13 consisting of public access terminals, namely base stations, accessible from a plurality of mobile user terminals 131, this access network 13 being connected to the core network 12.
• an access network 13 consisting of public access terminals, namely base stations, accessible from a plurality of mobile user terminals 131, this access network 13 being connected to the core network 12.
• Each private access base HG1 to HG3 is accessible to one or more authorized subscriber terminals in the case where an access control mechanism is implemented. If no access control mechanism is implemented, it is accessible to all terminals.
• Such mobile terminals may comprise a mobile cellular radio terminal, a PDA communicating personal digital assistant, or a communicating laptop, or a smartphone ("SmartPhone" in English), able to communicate with the operator network.
• PDA personal digital assistant
• communicating laptop or a smartphone
• smartphone SmartPhone
• a newly installed private terminal HG1 at a client When connected to the radio network, a newly installed private terminal HG1 at a client sends a configuration request 20 to the controller 11.
• the address of the controller 1 1 on which depends the private terminal has, for example, been communicated to the customer when subscribing to the service, or is resolved by a DNS query (in English, "Domain Name System").
• DNS query in English, "Domain Name System”
• Such a request includes an indication of the location of the private terminal. This is, for example, the IP address of the ADSL connection to which the customer has subscribed, or information on the "macroscopic" 2G or 3G network covering the terminal, such as the PLMN, the LAC or a cell identifier.
• the request concerns at least one configuration parameter.
• the parameters LAC, SAC and SAI previously defined will be considered in particular.
• the present invention is not limited to these particular configuration parameters, but applies to any type of parameter whose configuration may be related to the geographical location of the private terminal, such as for example a scrambling code ( in English, "scrambling code”).
• scrambling code is used in a 3G network implementing CDMA type access technology ("Code Division Multiple Access" for "code division multiple access”), to reduce the impact of interferences between the two. communications from two neighboring terminals using the same transmission frequency.
• the controller 1 1 Upon receipt of the request, the controller 1 1 assigns to said private terminal HG1 a geographical area GA1 according to the indication of location contained in the request. It should be noted that the choice of the geographical area and in particular its size depends on the type of configuration parameter considered. By way of example, for the configuration of parameters SAI, LAC and SAC, the geographical zone may correspond to a city or a district and be designated, for example, by the postal code of that city or district.
• the controller then queries a database 14 comprising a list of possible values of the parameter considered for the geographical area considered.
• Such a database can be located at the network level, centralized and searchable by all the controllers in the case where several controllers are deployed in the access network of the invention It can also be local to a controller.
• the controller selects a parameter value for the private terminal HG1 contained in the list of values provided by the database 13 and satisfying at least one constraint related to the location of the private terminal HG1. Finally, it sends a response message 22 to the private terminal HG1. According to one aspect of the invention, the controller must allocate a parameter value to the service terminal HG1 which satisfies a first selection constraint of the parameter value in a list of possible values defined by the communication network 12 for the network "macroscopic".
• LAC parameter for example, 65533 values are possible for a given PLMN, therefore for the entire mobile network of an operator in a country. These 65533 possible values are then distributed among the MSCs of this mobile network. Therefore, for the controller 1 1 attached to the MSC 121, the number of possible values to configure the LAC parameter of a private terminal for which it is responsible is the subset of the 65533 values assigned by the communication network 12 to the GA geographical area of the MSC. 121, we have, for example the 15 th rick of Paris, two values of LAC, which referred to below by LAC RC (for Communication Network), equal to 1 and 2.
• LAC RC for Communication Network
• said allocation step satisfies a second constraint imposing a single occurrence of a value of said parameter in said geographical area.
• This second constraint applies to the SAI parameter that can be used to determine the attachment terminal of a mobile terminal.
• This same parameter is used on the communication network side to route the emergency calls according to the location of the mobile terminal.
• a "microscopic" network is made to count a multiplicity of private terminals in the same geographical area, the actual number of which is not controlled by the operator.
• the allocation step of the method according to the invention allocates a pseudo-value of the parameter to said private terminal HG and said pseudo-value is selected so that it satisfies this second constraint.
• this second constraint can be applied to a parameter independently or cumulatively to the first constraint.
• the use of the pseudo values allows a very large possible list of values (allows in particular the uniqueness of the SAI value allocated to a terminal), while guaranteeing the communication network side a limited number of SAI in the translation and routing tables for emergency calls.
• the operator can thus use 13.107.000 pseudo-values of SAI at the radio terminals, while declaring at the level of the communication network only two values of the SAI parameter for the zone. 15 th nuances.
• the following table shows the R0 SAIs allocated on the communication network side and the pseudo-SAI values that can be used to allocate parameters to a terminal.
• An SAI is thus rated 208-01 -6-15, 208 being the MCC (Mobile Country Code: 208 for France), 01 being the MNC (Mobile Network Code: 01 for Orange), 6 being the LAC and 15 the SAC.
• an entity of the network for example the controller 1 1 consults a list of pseudo-values available in the database 14. Once it has selected a pseudo-value in the list, it updates it by deleting the selected value from the list of available values.
• the method according to the invention Upon receipt of a request for access to a service from said private terminal, the method according to the invention implements a step of converting the pseudo-value into a value of said parameter satisfying the first constraint.
• the parameter SAI is formed by concatenating the values of PLMN, LAC and SAC.
• PLMN has a fixed value for an operator in a given country. Therefore, the configuration of the SAI parameter in a fixed PLMN is closely related to that of the previously defined parameters (LAC, SAC).
• the step of converting the pseudo-values into a possible value defined by the communication network is performed by consulting a correspondence table stored in a database, for example the same database 14.
• FIG. 3 there is shown, for example, the routing of an emergency call from a mobile terminal 1 attached to the private terminal HG1.
• Private HG1 terminal is located in the geographical area of 15 th district of Paris.
• the terminal 1 sends 30 a call establishment request to the private terminal HG1 which relays 31 this request to the controller 1 1 on which it depends.
• this relay is implemented by encapsulating the call setup request in IP frames carried on the IP network 10 (not shown in FIG. 3).
• This request includes configuration parameters of the private terminal HG1, in particular the pseudo value of the parameter SAI according to the invention.
• the controller 1 1 converts this pseudo-value into a value of the parameter SAI defined by the communication network, which guarantees a unique and unambiguous value of SAI.
• the converted parameter is then routed 32 to the MSC on an IU-CS interface.
• Such an interface between an RNC and an MSC is defined by the specification 3GPP 25.410.
• the MSC can route the call to the nearest local LC1 emergency center at 33 and provide the same emergency location to the same emergency center LC1. subscriber from the geographical area, for example the postal code, of the private terminal to which the mobile terminal is attached.
• the dynamic allocation according to the invention of a pseudo-value satisfying the second constraint to the parameter SAI of the private terminal HG1, its conversion into a value satisfying the first constraint therefore allow the correct routing of the emergency calls to the correct one. local processing center.
• the broadcast application defined in the specification 3GPP TS 25.419, allows a service terminal to broadcast messages to the mobile terminals attached to it within the service area on which it depends. It is understood that by allocating a pseudo-value of SAI specific to a private terminal, a service could be offered, allowing subscribers to the service to broadcast personalized messages, for example making reference to the subscriber holding the private terminal, of type "welcome to the residential terminal of First Name!.
• this aspect of the invention can be implemented only in the case where the private terminal HG implements the functions of RNC and thus interprets the value of the parameter considered.
• the controller relays the messages it receives from the core network to the HG terminal and, for this purpose, converts the value of the parameter into a pseudo-value satisfying the aforementioned first and second constraints.
• the functions of RNC are implemented by the controller 11, the meaning of the value of the parameter SAC remains local to the controller and no parameter SAI is assigned to the private terminal.
• the allocation step is intended to satisfy a third constraint of a single occurrence of said value of said parameter among the private terminals adjacent to said private terminal in said geographical area.
• This third constraint relates in particular to the parameter LAC, which is for example used by the mechanism for controlling access to a private terminal. It can be considered independently or cumulatively with the first and second constraints. In the case of the LAC parameter, the third constraint can be considered cumulatively with the first, because the chosen value must be part of a list of values defined by the communication network, but the second uniqueness constraint is not relevant. .
• each private access terminal with a separate LA parameter, at least for neighboring private access points (it is indeed possible to tolerate only two private access points far apart one on the other side have the same location area).
• a parameterization has the effect of triggering a location update procedure (or "Location Area Update") to a mobile terminal when it tries to attach to a private terminal.
• a location update procedure or "Location Area Update”
• the allocation step must recover the values allocated to neighboring private terminals for the parameter considered. This recovery can be implemented by the private terminal which collects information on the configuration of its neighbors by listening to messages that they broadcast, and sends the collected information to the controller. It can also be implemented by the controller itself, which interrogates the neighboring terminals of the terminal awaiting configuration.
• the controller has no previous knowledge of the neighboring terminals of the private terminal. It is therefore necessary to communicate to the controller location information concerning the terminals to identify them and search their database for configuration values. This is for example achieved by the terminal itself.
• the dynamic allocation step then updates the list of possible values for the private terminal by deleting said neighboring values.
• this third constraint is applied not only to the parameter LAC, but also to the parameter SC (scrambling code).
• the allocation step is intended to satisfy a fourth constraint which imposes a homogeneous distribution of the instances of the value of a parameter among the private terminals adjacent to a private terminal in the geographical area. which it depends.
• This fourth constraint relates in particular to the LAC parameter, for which it was specified that two private access terminals that are very far apart from one another could be tolerated to have the same value, and therefore the same location area.
• the list of possible values stored in the database 14 indicates a number of instances of said value for the plurality of private terminals in the geographic area of the MSC and the substep selection selects the value for which the number of instances already allocated in the said geographical zone is the lowest.
• Such a selection in the list of possible values can implement a pseudo-random algorithm according to a technique known to those skilled in the art that is not described here. This minimizes the risk that a mobile terminal will attempt to attach successively to private terminals having the same value of LAC.
• this fourth constraint is added to the third one. However, it can be considered independently of the third constraint for another type of parameter.
• the steps of the method of configuring a terminal for access to a service according to the invention are determined by the instructions of a computer program incorporated in a data processing device such as
• the program comprises program instructions which, when said program is loaded and executed in the device whose operation is then controlled by the execution of the program, carry out the steps of the method according to the invention.
• the invention also applies to a computer program, in particular a computer program on or in an information recording medium, adapted to implement the invention.
• This program can use any programming language, and be in the form of source code, object code, or intermediate code between source code and object code such as in a partially compiled form, or in any other form desirable to implement the method according to the invention.

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• 2006
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  • 2007-10-16 US US12/446,134 patent/US20100144362A1/en not_active Abandoned
  • 2007-10-16 WO PCT/FR2007/052167 patent/WO2008047039A1/fr active Application Filing
  • 2007-10-16 EP EP07858593A patent/EP2087709A1/fr not_active Withdrawn
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