• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:BE1020800A3
    申请号:E201200583
    申请日:2012-09-06
    公开日:2014-05-06
    发明作者:Laurent Girardeau；Franck Cibaud
    申请人:Astrium Sas；
    IPC主号:
    专利说明:

    A method of triggering a network selection operation with a. termination] of communication
    The present invention relates to the field of cellular communication networks and more particularly to a method of selecting such a network by a communication terminal.
    The invention is described in the context of the family of GSM (Global System for Mobile Communications) mobile communication standards and its evolutions. However, it can not be limited to these standards and could be applied in any similar system.
    In these systems, a communication terminal operates according to the GSM standard where one of its evolutions typically comprises a module for managing the identity of the terminal and access to the communication networks. This module is typically implemented by a so-called SIM card (Subscriber Identity Module). It is used to store the subscriber-specific information of a mobile network. It also allows to store applications of the operator.
    The identity of a subscriber on the network is identified by an identifier called IMSI (International Mobile Subscriber Identity) stored in this SIM card. This identifier is not accessible to the user. It is linked to an external identifier or ISDN (Integrated Services Digital Network) mobile station number called MSISDN (Mobile Station ISDN Number). This identifier is commonly called the telephone number because it is the number that must be called to reach the user.
    A terminal automatically selects a Public Land Mobile Network (PLMN) when it is powered on and due to a loss of network coverage. The user's subscription corresponding to the IMSI identifier is associated with a nominal network called HPLMN (Home PLMN). If this nominal network is available, the terminal connects to this network. If it is not available, it then tries to connect to another available network according to priority rules defined in the GSM standard. Typically, the SIM card stores a list of authorized networks that is browsed until the terminal finds an available network in this list. The list is sorted in order of priority. Possibly a second list stores the forbidden networks for this subscription. These network selection rules are linked to the subscription and therefore to the IMSI identifier. The same SIM card can memorize several subscriptions and therefore several IMSI identifiers. Each of its identifiers is then associated with a set of priority rules for the selection of the network. At a given moment, only one identifier is active, the associated rules are then those that are used to select the network. A command set allows the user or a terminal application to change the active subscription.
    According to the standards in force, this network selection operation intervenes only when the terminal is turned on and when the coverage of the selected network is lost. It can also be triggered manually by the user by means of the control interface of the terminal. When a network is selected and available, in the absence of a voluntary action of the user it is not possible to trigger such a network selection operation.
    In a number of situations, it would be advantageous to be able to trigger a network selection operation in circumstances other than those provided by the standard.
    The invention aims to solve the above problems by a method of triggering a network selection operation by sending a message to the terminal. The message may directly contain a trigger command of the network selection operation. This order can be linked to a subscription and therefore a given subscriber identifier. The message may also contain information relating to a geographical location. The terminal then triggers the network selection operation when it recognizes the geographical location communicated.
    The invention relates to a method for triggering a network selection operation by a communication terminal operating according to the GSM standard where one of its evolutions, said terminal being connected to a first communication network which comprises a reception step a message carrying a triggering instruction of a network selection operation and a step of triggering a network selection operation in response to receiving said message.
    According to a particular embodiment of the invention, the method further comprises a step of sending an acknowledgment of receipt to indicate that the selection operation of the network has taken place.
    According to a particular embodiment of the invention, the acknowledgment of receipt comprises the network identifier selected at the end of the network selection step.
    According to a particular embodiment of the invention, the message being of the immediate start command type of a network selection operation, the network selection operation is triggered immediately.
    According to a particular embodiment of the invention, the message being of the type of subscriber identity switching instruction, the method further comprises a step which causes the switch of subscriber identifier, the selection step a new network is then performed in the process of reconnecting to the terminal network using this new identifier.
    According to a particular embodiment of the invention, the message being of the type containing information relating to the geographical location of a second network, the method further comprises a step of geolocation of the terminal and a step of comparing the location of the terminal with the location information of the second network provided in the message and determining that the terminal is in the area covered by the second network; the step of triggering the network selection operation being performed if it is determined that the terminal is in the area covered by the second network.
    According to a particular embodiment of the invention, the step of geolocation of the terminal and the step of comparing the location of the terminal with the location information of the second network provided in the message are repeated until it is not determined that the terminal is in the coverage area of the second network.
    The invention also relates to a communication terminal operating according to the GSM standard where one of its evolutions, said terminal being connected to a first communication network which comprises means for receiving a message carrying a triggering instruction of a selection operation network and means for initiating a network selection operation in response to receiving said message.
    According to a particular embodiment of the invention, these means are implemented in the form of a specific software module within the software embedded in the SIM card of said terminal.
    The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, said description being given in relation to the attached drawings, among which:
    Fig. 1 illustrates an example of network coverage in the context of the invention.
    Fig. 2 illustrates the system architecture of an exemplary embodiment of the invention.
    Fig. 3 illustrates the operating flow diagram of the terminal in an exemplary embodiment of the invention.
    The invention is placed in the context where an administrator of a fleet of communication terminals manages a particular mobile telecommunication network covering a typically limited geographical space. This network is typically limited to one or a few cells intended to provide a privileged means of communication to a group of users when they are in a given geographic location. This may be, for example, a company wishing to implement such a network to cover a branch abroad.
    It is generally desirable for the terminal to operate in a standard manner when out of reach of the preferred network. For this, it has a standard subscription with an operator and therefore has an associated nominal network.
    Privileged network access may be associated with this standard subscription and appear in the network selection priority rules associated with that subscription. Typically, this privileged network will have a priority ranking allowing it to be prioritized over any other network that may be available in the preferred network deployment environment. Alternatively, the privileged network can also be associated with a particular subscription and therefore with an own IMSI identifier different from the standard IMSI of the terminal.
    An example of network coverage corresponding to this case is illustrated in FIG. 1. This figure shows a first network typically managed by a national operator and comprising a set of cells 1.1. The preferred network consists in this example of a single cell 1.2 shown in dashed lines. Thus, the geographic reach of the preferred network is reduced in relation to the geographic scope of the national network.
    When one imagines a user of a terminal according to the invention, it is very likely that he puts his terminal under tension outside the coverage of the privileged network. He will therefore select the national network for his communications. When it arrives in the geographical area of coverage of the privileged network, this zone is also covered by the national network. Since this network is already selected and there is no loss of coverage, there is no triggering of a network selection operation. In the absence of an action by the user, the terminal does not switch in a reasonable time on the privileged network, yet a priority, it remains attached to the national network.
    We want to avoid this case and cause the triggering of the network selection operation when the terminal is in the coverage area of the preferred network.
    According to a first embodiment, the preferred network and the terminal fleet are administered by an administrator with means to manage this fleet and the privileged network. These management means are known means and widely used by operators of mobile communication networks.
    According to this embodiment, it is this administrator who initiates the trigger. The system is illustrated in FIG. 2. The terminal 2.1 has previously selected the network 2.2 which is the national network. The administrator in front of his management system 2.6 notes that the terminal is also under the coverage of the network 2.3 which is the preferred network. It triggers a command of the management system 2.6 which causes the sending of a message 2.9 to a mail server of the national network. Advantageously, this message is in the form of a short text message SMS {Short Message Service in English) of class 2 intended to be interpreted by the SIM card of the terminal. In this case, the messaging server 2.4 is an SMS service center (SMSC for SMS Center). Any other type of message can also be used, for example email. The message is then transmitted via the national network 2.2 to the terminal 2.1 by the links 2.8 and 2.7.
    The message is then interpreted by the terminal and more precisely in the embodiment or the terminal obeys the GSM standard or one of its derivatives, by the SIM card of the terminal. According to this first embodiment, the message is interpreted as an instruction for immediately triggering a network selection operation. The terminal therefore triggers this network selection operation immediately.
    Following this new selection, the terminal is then covered by the preferred network, this network is then selected by the terminal. The terminal therefore connects to the privileged network 2.3 by establishing the link 2.10.
    It is possible that at the moment when the message is interpreted and therefore the network selection operation is triggered, the privileged network is momentarily out of reach of the terminal. In this case, the terminal typically selects the national network again. This is detectable by the operator who administers the fleet of terminals which can then renew the operation.
    Advantageously, the terminal or the SIM card are provided with means for sending an acknowledgment (acknowledge in English) to the sender of the message, that is to say the management system 2.6. This acknowledgment advantageously comprises the identifier of the selected network. The administrator can then easily check the success of the operation, that is to say that the terminal has selected the preferred network. The acknowledgment message advantageously takes the form of an SMS message sent to the management system via an SMSC message server 2.5 of the selected network.
    In this embodiment, the network priority rules associated with the terminal user's subscription must be adapted so that the privileged network is authorized and has a higher selection priority than any other network that may be available in the zone. coverage of the privileged network.
    According to a second embodiment, the selection of the privileged network is dedicated to a specific subscription. In this second embodiment, the terminal has at least two subscriptions stored in the SIM card of the terminal. This SIM card stores two subscriber identifiers, typically IMSI identifiers, as well as two sets of priority rules for the selection of communication networks. A first game is linked to the first subscription, a second game is linked to the specific subscription and contains the authorization with a high priority of the privileged network.
    According to this second embodiment, the message is then interpreted as a switching message to the specific subscriber identifier of the privileged network. When the terminal receives the message, it changes its subscriber identity, which causes the end of the connection to the national network and a new network selection operation using the priority rules of the new subscription. Advantageously, the message then contains the subscriber identifier to be used. An acknowledgment can be advantageously sent to the management system in this embodiment as well.
    According to a third embodiment, the message received by the terminal contains information relating to the geographical location of the privileged network. These may be geographic coordinates of the GPS (Global Positioning System) type. It may also be a list of GSM cells within radio range of the preferred network base station or any other means of geographically locating the preferred network. In this case, the message is not interpreted as an instruction for immediate triggering of a network selection operation, but as an instruction for a delayed triggering of this network selection operation. The terminal then periodically checks its own geographical location that it compares with the information received. When it determines that it is in range of the privileged network, it triggers the network selection operation. This comparison may take the form of a comparison of its own location with that of the base station to calculate the distance that separates the terminal from this base station. It is then determined that one is in range of the privileged network when this distance is less than a given threshold. The value of this threshold can be configured in the application or received in the message with the information relating to the geographical location of the privileged network.
    The comparison can be made by comparing the list of GSM cells accessible to the terminal and the list provided within the message.
    The comparison may take any other form depending on the geographical location means available to the terminal and the content of the location information provided within the message.
    These three embodiments can be combined and the same terminal can have means to respond to the three types of messages that have been described. Fig. 3 illustrates an exemplary embodiment of a method for triggering a selection operation according to the invention made by a communication terminal.
    In a preliminary preliminary step 3.1, the terminal connects to a first network. This is the network we have called the national network in this document to distinguish it from the privileged network. This step may take place long before the other steps. It is assumed that the terminal is connected to a network. Otherwise, it is not possible to communicate with him. But in this case, a network selection operation will occur when the terminal is powered up or it will recover network coverage. The problem of triggering such an operation does not arise.
    This terminal then receives a message carrying a command to trigger a network selection operation in step 3.2. This message is one of three types of messages that have been described. Advantageously, the type of message is identifiable by the content of said message. For example, a type identifier may be provided in the body of the message. This message can be transmitted by any protocol allowing communication between the management system 2.6 and the terminal. It can be a dedicated proprietary protocol managed by a specific terminal application. It can be a known messaging protocol such as the email system. According to the exemplary embodiment, it is the SMS system which is used and more particularly the class 2 messages intended to be interpreted by the SIM card management application of the terminal. These messages are not presented to the user.
    This message is managed by a dedicated software module. This module can be present either in the application layer of the terminal or directly implemented in the management software of the SIM card. The latter solution is preferred for direct access to the parameters managed by the SIM card such as subscriptions. But an application in the terminal, if it has the necessary permissions, can also obtain access to these parameters via a communication interface with the SIM card management software.
    In step 3.3, it is determined whether the received message is an instruction message for immediate triggering of a network selection operation. If this is the case, we proceed to step 3.9 of triggering such a network selection operation. Otherwise, it is determined in step 3.4 whether it is a subscriber identity change message. Such a message may contain the subscriber identifier to be used. Alternatively, this identifier is configured in the terminal and the message simply contains the instruction to switch to this previously configured identifier. We then go to step 3.6 which causes the switch of subscriber identifier. The terminal must then perform step 3.9 of selecting a new network in the process of reconnecting to the terminal network using this new identifier.
    If the message is not a switch instruction message on a new subscriber identifier, it is determined in step 3.5 whether it is a message containing information relating to the geographical location of the network. privileged. If this is not the case, the processing stops. Otherwise, we go to step 3.7 which consists of using the geolocation means of the terminal. This gives information relating to the location of the terminal. It can be a GPS coordinate if the terminal has a GPS receiver module and GPS information is available. It can also be an analysis of the cellular environment of the terminal. In this case, we obtain a list of accessible cells which allows a calculation of the location of the terminal. Any other means can also be used as a triangulation compared to WiFi base stations or the like.
    In step 3.8, the location of the terminal is compared with the location information of the privileged network provided in the message. This comparison makes it possible to determine if one is in the area covered by the privileged network. If so, proceed to step 3.9 and initiate a network selection operation. Otherwise, we loop on step 3.7 geolocation of the terminal. The geolocation step 3.7 and the terminal location comparison step 3.8 with the second network location information provided in the message are repeated until it is determined that the terminal is in the coverage area. of the privileged network. The repetition frequency can then be adjusted advantageously so as not to run the risk of exhausting the terminal's energy resources.
    It can be seen that according to this embodiment, once the message containing the location information of the privileged network has been received, the operation of selecting the network is triggered as soon as the terminal enters the zone covered by this privileged network.
    Advantageously, the operation of triggering the network selection operation 3.9 is followed by a step 3.10 of sending an acknowledgment to indicate to the administrator that the selection operation of the network has taken place.
    Advantageously, this acknowledgment contains the identifier of the network then selected. In this way, the administrator is able to verify that the terminal has successfully switched to the expected network.
    Advantageously, the terminal is adapted to issue this acknowledgment containing the identifier of the selected network each time a network selection operation is performed. And this even in the case where the triggering factor is the power of the terminal or the output of a state of loss of coverage of the network and not the receipt of the message according to the invention. Thus, the administrator can detect that a terminal previously connected to the privileged network has momentarily lost the coverage of this network and has connected again to the national network. The administrator then triggers a new message sending to cause a network selection operation again.
    Advantageously, the exchanged messages are electronically signed to reliably identify the system transmitting the messages. This prevents a third party from tripping impromptu network selection operations.
    It can be seen that in all the embodiments of the invention there is a method which comprises a step of sending a message to a terminal, that this message triggers a network selection operation. This operation is triggered in a delayed manner when the message contains the geographic location information of the privileged network. This operation is triggered immediately in the other two cases. In the first case, the current subscriber identifier is used. In the second case, a second subscriber identifier is used. A terminal according to the invention can implement one of the embodiments of the invention or any combination of the three described modes. The invention is implemented in the terminal by a specific software module that can be implemented in the application layer of the terminal, in its system layer or directly in the software embedded in the SIM card of the terminal. The message exchanges can be implemented by any communication protocol between the network management system used by the administrator and this specific software module.
    权利要求:
    Claims (8)
    [1]
    CLAIMS 1 / A method of triggering a network selection operation by a wireless communication terminal, said terminal being connected to a first communication network, said method comprising: a step (3.2) of reception by said terminal of a communication network; a message carrying a triggering instruction of a network selection operation; a step (3.9) of triggering by said terminal of a network selection operation in response to the reception of said message; characterized in that: - said terminal is, before receiving said message, configured to be connected primarily to a second communication network; an administrator has means for managing said second network, to which the administrator is placed to manage said second network; said message is transmitted to said terminal by said management means, following a triggering action by said administrator when said administrator finds that said mobile terminal is also in the coverage of the second network.
    [2]
    2 / A method according to claim 1, characterized in that it further comprises a step (3.10) sent by the terminal of an acknowledgment to indicate that the selection operation of the network has occurred.
    [3]
    3 / A method according to claim 2, characterized in that the acknowledgment of receipt comprises the network identifier selected at the end of the network selection operation.
    [4]
    4 / A method according to one of claims 1 to 3, characterized in that the message being of the immediate start command type of a network selection operation, the network selection operation is triggered immediately.
    [5]
    5 / A method according to one of claims 1 to 3, characterized in that the message being of the type of subscriber identity switching instruction, the method further comprises a step (3.6) which causes the switching of identifier subscriber, the step (3.9) of triggering the network selection operation is then performed in a process of reconnecting the terminal to a network using this new identifier.
    [6]
    6 / A method according to one of claims 1 to 3, characterized in that the message being of the type containing information relating to the geographical location of the second network, the method further comprises the following steps performed by the terminal: - a step (3.7) geolocation of the terminal for obtaining terminal location information; a step (3.8) comparing the location of the terminal with the location information of the second network provided in said message and determining that the terminal is in the coverage of the second network; and in that the step (3.9) of triggering the network selection operation is performed if the terminal is in the coverage of the second network.
    [7]
    7 / A method according to claim 6, characterized in that the step (3.7) of geolocation of the terminal and the step (3.8) for comparing the location of the terminal with the location information of the second network provided in the message are repeated. as long as the terminal is not in the coverage of the second network.
    [8]
    8 / System for triggering a network selection operation by a wireless communication terminal, said terminal belonging to said system and connected to a first communication network, said terminal comprising: means for receiving a message issuing a trigger instruction of a network selection operation; means for triggering a network selection operation in response to the reception of said message; characterized in that said terminal is, prior to receiving said message, configured to be connected primarily to a second communication network; and in that said system is adapted to make available to an administrator means for managing said second network, before which the administrator is placed to manage said second network; and in that said management means are adapted to enable the administrator to note that said mobile terminal is also in the coverage of the second network and are adapted to transmit said message to said terminal, following a triggering action on the part of said administrator.
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    法律状态:
    2020-08-06| MM| Lapsed because of non-payment of the annual fee|Effective date: 20190930 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1102749A|FR2980073B1|2011-09-12|2011-09-12|METHOD OF TRIGGERING A NETWORK SELECTION OPERATION BY A COMMUNICATION TERMINAL|
    FR1102749|2011-09-12|
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