EP2767107A2 - Digital radio-communication system for changing a narrow-band infrastructure and terminals into a wide-band infrastructure and terminals - Google Patents

Digital radio-communication system for changing a narrow-band infrastructure and terminals into a wide-band infrastructure and terminals

Info

Publication number
EP2767107A2
EP2767107A2 EP12783098.2A EP12783098A EP2767107A2 EP 2767107 A2 EP2767107 A2 EP 2767107A2 EP 12783098 A EP12783098 A EP 12783098A EP 2767107 A2 EP2767107 A2 EP 2767107A2
Authority
EP
European Patent Office
Prior art keywords
ptt
server
applications
terminal
wan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12783098.2A
Other languages
German (de)
French (fr)
Inventor
Laurent Pison
Olivier Paterour
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Airbus DS SAS
Original Assignee
Cassidian SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cassidian SAS filed Critical Cassidian SAS
Publication of EP2767107A2 publication Critical patent/EP2767107A2/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/10—Architectures or entities
    • H04L65/1016—IP multimedia subsystem [IMS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/64—Hybrid switching systems
    • H04L12/6418—Hybrid transport
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • 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
    • H04W84/08—Trunked mobile radio systems

Definitions

  • the present invention relates to the field of private digital mobile radio systems. It finds particularly advantageous applications in the private systems of professional radiocommunication (or system PMR, for Professional Mobile Radio in English).
  • the purpose of this radio communication system according to the invention is to enable the establishment of a communication link between a set of narrow-band Push To Talk (PTT) terminals with broadband PTT type terminals.
  • PTT Push To Talk
  • PTT Push To Talk, or Press To Transmit
  • This communication method is performed on a half-duplex link, and relies on the push of a button to switch the PMR terminal from a receiving state to a data transmitter state, such as voice, including, but not limited to generally of data of any kind.
  • a half-duplex link is a communication channel that transports data in both directions, but not simultaneously, in other words, either as a rising link (Up-link in English) or as a downlink (or down-link). in English).
  • the Push To Talk communication method is a real-time Internet Protocol (IP) voice service implemented over a packet data network.
  • IP Internet Protocol
  • FIGS. 1a-1c are illustrations of a radio communication system 100 generally used for PTT terminals 1 10.
  • a radiocommunication PTT terminal 10 is conventionally interfaced to a network infrastructure 120 via a network.
  • This network infrastructure 120 comprises one or more routing subsystems 140, also called regional networks.
  • a routing subsystem 140 is considered to be the smallest subsystem that can offer PMR services 160 via an IP network 165.
  • Each subsystem 140 includes a switch also called PTT server 150 able to manage the mobility of PTT terminals. 110 on the network and to ensure communication between the various PTT terminals 110 of said network.
  • the PTT server 150 is also able to interface with one or more other PTT servers 150, in order to allow the networking of several subsystems 140 between them and thus be able to cover a large geographical area.
  • the current PTT radiocommunication infrastructures are provided for terminals 110 operating on low bandwidth (or Narrow Band).
  • the PMR 160 services can only be accessible for low-speed applications, but the modernization of these PTT telecommunications infrastructures is necessary, in order to make them evolve into broadband, also called broadband (or Broad Band). .
  • the present invention aims to solve all the disadvantages of the state of the art.
  • the invention proposes a radio communication system allowing interoperability between a PMR terminal operating on a broadband network, according to any one of the features of claim 1 and following.
  • the invention thus makes it possible to establish, maintain, and interrupt a voice and / or data communication link between a PTT terminal (for Push To Talk) intended to operate on a narrow band network (or Narrow Band), and a terminal with PTT applications, intended to operate on a broadband network (or Broad Band).
  • the invention is capable of operating with narrowband network infrastructures of technology TETRA (for Terrestrial Trunked RAdio), or TETRAPOL (for TErrestrial Trunked RAdio POLycom), or P25 (Project 25).
  • the invention is also capable of operating with broadband networks of the IP-WAN type (for Internet Protocol Wide Area Networks).
  • IP-WAN networks are networks based on WIFI technologies (Wlreless Fldelity), and / or WIMAX (Worldwide Interoperability for Microwave Access), and / or 2G ( 2nd Generation of cellular network), and / or 3G (3rd generation cellular network) and / or LTE (Long Term Evolution).
  • WIFI technologies Wired Fldelity
  • WIMAX Worldwide Interoperability for Microwave Access
  • 2G 2nd Generation of cellular network
  • 3G 3rd generation cellular network
  • LTE Long Term Evolution
  • the invention therefore allows broadband terminals to access services or applications that are normally intended for narrowband terminals.
  • the invention allows a terminal operating on IP-WAN technologies to access additional services, which were previously reserved only to PTT narrowband terminals.
  • broadband and narrowband network infrastructures are fully interoperable.
  • An advantage of the invention is that the interoperability between the narrowband and broadband network infrastructures is totally independent of the future evolution of IP-WAN terminals, or any other technological evolution of these broadband mobile radio terminals.
  • the invention also enables broadband terminals accessing narrowband services to simultaneously access broadband services.
  • the subject of the invention is therefore a radio communication system intended for Push To Talk type applications comprising:
  • a narrowband PMR technology terminal capable of connecting, via a radio interface, to a narrowband network infrastructure, allowing access, via a PTT server, to a set of PTT resources or applications; narrowband,
  • a broadband technology terminal capable of connecting, via a radio interface, to an IP-WAN network, allowing access, via a server, to a set of resources or broadband PTT applications ,
  • said terminal comprises a PTT client application on the IP-WAN network, configured so as to establish an IP connection, via an interface, between the terminal, and a PTT server over IP-WAN, enabling said terminal access narrow-band PTT resources or applications and establish a communication channel with the terminal.
  • the invention also includes any of the following features:
  • IP-WAN PTT server is able to connect, via an interface, to a PTT server of a narrowband network infrastructure, and / or to another PTT server over IP-WAN;
  • the interface allowing the link between the PTT server of the narrowband network infrastructure and the PTT server on IP-WAN comprises a gateway, making it possible to convert the signal coming from the PTT server of the narrowband network infrastructure into a operational signal for the PTT server over IP-WAN, and vice versa;
  • the network infrastructure is capable of being TETRA technology, or TETRAPOL, or P25;
  • the terminal is a cellular telephone provided with a PTT client application over IP-WAN comprising a PoC software client, associated with a software component giving access to narrowband PTT services or applications, said PoC client also being associated with a software component providing access to PTT broadband services or applications;
  • the PTT server over IP-WAN comprises a core based on an OMA PoC protocol and associated with the software client.
  • the server further comprises a software component intended to emulate the gateway between the PTT server and the kernel;
  • the PTT server over IP-WAN comprises a kernel based on a P25 PoC protocol and associated with the software client;
  • the PTT server on IP-WAN includes a software component for performing the adaptation necessary for operation between an OMA client / server and a client / server P25, so that they can achieve joint communication together;
  • the invention also relates to a mobile terminal comprising Push To Talk type applications configured to be able to evolve in a radio communication system according to any one of the preceding features.
  • FIG. 3 a functional representation of the radiocommunication system, according to one embodiment of the invention.
  • FIG. 7 a set of schematic representations of the system according to a Mode 1 embodiment of the invention, provided with an OMA PoC server and adapted respectively to the protocols P25, TETRA, TETRAPOL.
  • FIG. 8 a set of schematic representations of the system according to a Mode 2 of embodiment of the invention, provided with a P25 server PoC and adapted respectively to the protocols P25, TETRA, TETRAPOL.
  • FIGS. 9a-9b schematic representations comparing the management system of the system according to one embodiment of the invention and the state of the art.
  • FIG. 2a is an illustration of a PMR radiocommunication system according to the invention.
  • This PMR radiocommunication system comprises a radio-controlled PTT terminal 110 interfaced to a network infrastructure 120 via a set of base stations 130.
  • This network infrastructure 120 comprises a set of routing subsystems, also called regional networks 140.
  • routing sub-system 140 it is understood that it is the smallest subsystem that can offer PMR services.
  • Each subsystem 140 includes a switch, also called PTT server 150, able to manage the mobility of the terminals 110 on the network and to ensure communication between the various PTT terminals 110 of said network.
  • the PTT server 150 is able to connect to other PTT servers 150 of subsystem 140 via an interface 155. As a result, the subsystems 140 are able to connect with each other so as to cover a large area. geographical.
  • the PTT server 150 is of P25 technology (for Project 25).
  • the PTT server 150 is of TETRA technology (TErrestrial Trunked RAdio).
  • the PTT server 150 is of TETRAPOL technology (for TETRA POLice).
  • network infrastructures 120 as defined in the state of the art, are only intended for terminals 110 operating on low-speed, also called narrow-band terminals (or Narrow Band in English).
  • IP WAN Internet Protocol
  • radio broadband or broadband technologies such as LTE (Long Term Evolution), and / or 3G (3rd Cellular Network Generation), and / or 2G ( 2nd Generation Cellular Network), and / or WIMAX (Worldwide Interoperability for Microwave Access), and / or WIFI (Wireless Fidelity).
  • LTE Long Term Evolution
  • 3G 3rd Cellular Network Generation
  • 2G 2nd Generation Cellular Network
  • WIMAX Worldwide Interoperability for Microwave Access
  • WIFI Wireless Fidelity
  • the terminal 210 connects to the server 265, via a set of base stations 230, giving access to an IP-WAN network 240.
  • the invention provides, on the one hand, that such an IP-WAN terminal 210 comprises a client application PTT 215 on the IP-WAN network and that on the other hand, a server 250 is set up, so the execution of the client application 215 creates a client / server interface 225 allowing access to PTT services 160 via the IP-WAN network 240.
  • the server 250 emulates an imitation of the physical behavior of a PTT server 150 by software able to connect with a real PTT server 150 via an interface 155.
  • the server 250 is able to connect to one or more other server (s) 250 via an interface 255.
  • the client / server interface 225 allows the terminals 210 to access the applications 160 and / or the applications 260 accessible via the server 265.
  • the interface 225 further allows the terminals 210 to establish a communication link with one or more terminals 110.
  • the terminals 110 are able by means of the interface 225 to establish a communication link with one or more terminals 210.
  • the terminals 110 do not have the possibility to access the resources or broadband applications accessible only by the server 265.
  • the invention is capable of operating with network infrastructures 120 of TETRA technology (for Terrestrial Trunked RAdio), or TETRAPOL (for TErrestrial Trunked RAdio POLycom), or P25 (for Project 25) and their respective terminals 110.
  • TETRA technology for Terrestrial Trunked RAdio
  • TETRAPOL for TErrestrial Trunked RAdio POLycom
  • P25 for Project 25
  • the PTT server 150 associated with the technology of the infrastructure 120, can communicate bidirectionally with the PTT server over IP-WAN, via a gateway. 454.
  • This gateway 454 is intended to convert the signal from the PTT server 150 into an operational signal for the PTT server 250 over IP-WAN, and vice versa (see FIG. 4).
  • a user terminal 510 is a mobile telephone.
  • This cell phone 510 is provided with a 515 PTT client application on IP-WAN comprising a 511 PTT software client on a cellular telephone, generally called a PoC client (or PTT Over Cellular in English).
  • This software client 511 PTT is associated with a software component 512 giving access to services or applications PTT narrowband (Narrow Band or NB).
  • the software client 511 is associated with a software component 513 giving access to services or PTT applications broadband (Broad Band or BB in English).
  • the software client 51 is able to come into contact with a server 550, having the same inputs / outputs as the server 250 previously described.
  • the server 550 comprises a 551 PTT core on a cellular telephone (or PoC Kernel in English) capable of operating on an IP-WAN network.
  • This core 551 is associated with a first software component 552 emulating access to services or applications PTT Narrow Band.
  • Core 551 also includes a second software component 553 emulating access to PTT Broad Band services or applications.
  • the server 550 further comprises a software component 554 for emulating the gateway 400 between the PTT server 150 and the core 551.
  • Mode 1 and Mode 2 Two other embodiments, illustrated in FIG. 6, respectively called Mode 1 and Mode 2, result from the embodiment according to FIG. 6, respectively called Mode 1 and Mode 2, result from the embodiment according to FIG.
  • the cell phone 510 is provided with a 511 PTT software client on cell phone based on the OMA (Open Mobile Alliance).
  • the OMA standard is an organic standard that defines standards for PoC networks.
  • the OMA PoC standards have established rules for controlling the initialization of PTT call transmission in PoC networks.
  • the software component 512 giving access to narrowband PTT services or applications, is of the P25 type.
  • the software component 513 remains unchanged from that of FIG. 5.
  • the terminal 510 according to Mode 1 is able to establish a connection 525, through an access to a network 240 IP-WAN, to the server 550 based on on a 551 OMA PoC core.
  • the interface 525 allowing the link between the software client 511 and the server 550 is based on the OMA PoC server / client protocol V2.1.
  • the software component 554 emulates a PTT gateway based on the P25 protocol, and intended to communicate with a P25 PTT server 150.
  • the interface allowing such interconnection is based on the P25 and is defined as an interface between subsystem, usually called ISSI (for Inter-Sub-System Interface in English).
  • the ISSI interface is defined as being able to determine rules for controlling the initialization of the transmission of PTT calls in P25 networks.
  • the software component 552 is in turn, in this example of Mode 1, configured to emulate access to PTT services based on P25.
  • Figure 7 has this interesting, in that it allows to understand fairly quickly the developments to adapt to Mode 1 of Figure 6 to obtain an equivalent system compatible with TETRA or TETRAPOL technologies.
  • the gateway 554a is based on the P25 technology and is able to interconnect via the interface.
  • the software component 552a emulates, when he, access to PTT P25 services or applications.
  • the server 550a is based on a 551 OMA PoC kernel and allows access via the software component 553 to PTT Broad Band services or applications.
  • the 554b gateway is based on TETRA technology and is able to interconnect via a 155b ISI interface (for Inter-System- Interconnection).
  • the 552b software component emulates access to TETRA services or applications.
  • the core 551 and the software component 553 remain, when they are respectively identical to those described above.
  • the principle is completely identical when it is a PTT 150c server, based on TETRAPOL technology, that is, the RFSS is based on TETRAPOL, the 554c gateway is based on TETRAPOL technology and is suitable for Interconnect via a 155c IRN interface (for Inter-Regional-Network).
  • the 552c software component emulates access to TETRAPOL services or applications.
  • the core 551 and the software component 553 remain respectively identical to those described above.
  • the cell phone 610 is provided with a client application 615 PTT over IP-WAN comprising a 611 PTT client software on a cellular telephone based on the P25 PoC standard.
  • the software components 512 and 513 remain respectively identical to those of the Mode 1.
  • the terminal 610 according to the Mode 2 is able to establish a first 625a and a second 625b connections, through access to a network 240 IP-WAN, to a server 650 based on a core 651 P25 PoC.
  • the server 650 is it based on a core 651 P25 PoC?
  • the interfaces 625a, 625b allowing the link between the software client 611 and the server 650 are based on a SCI protocol (for Subscriber Client Interface).
  • the SCI protocol inherits all the properties of the ISSI protocol, such as the SIP / RTP over IP (Internet Protocol) property.
  • the 625a interface is used as a Narrow Band for the Server / Client protocol.
  • the 625b interface is used as a broadband transmission channel.
  • the server 650 because of its core 651 based on the P25 PoC protocol, is able to interconnect with the PTT server 150 via an ISSI interface and without gateway. However, to interconnect with other elements of the network, the server 650 uses a software component that emulates a gateway 654 based on the OMA protocol. Indeed, if one wishes to interoperate OMA clients / server, with clients / server P25, in the same PTT communication, such a gateway 654 makes it possible to perform the adaptation necessary for the operation (or Inter-WorKing in English) between two servers, to achieve a common communication. The interface allowing such an interconnection is based on the OMA IWK protocol (for Inter-WorKing). Software components 552 and 553 remain respectively unchanged from those of Mode 1.
  • FIG 8 allows to understand quite quickly the developments to adapt to Mode 2 of Figure 6 to obtain an equivalent system compatible with TETRA or TETRAPOL technologies.
  • the gateway 554a is based on the P25 technology and is able to interconnect via the interface.
  • the software component 552a emulates, when he, access to PTT P25 services or applications.
  • the 650a server is based on a kernel
  • the server 650a PoC P25 and provides access via software component 553 to PTT Broad Band services or applications.
  • the server 650a is able to interconnect with other software component via the gateway 654.
  • the PTT 50b server is based on TETRA technology, that is, the RFSS is based on TETRA
  • the 554b gateway is based on TETRA technology and is able to interconnect via a 155b ISI interface (for Inter-System-Interconnection).
  • the 552b software component emulates access to TETRA services or applications.
  • the 650b server based on a core 651 and the software components 553 and 654 remain, when they are respectively identical to those described above.
  • the principle is completely identical when it is a PTT 150c server, based on TETRAPOL technology, that is, the RFSS is based on TETRAPOL, the 554c gateway is based on TETRAPOL technology and is suitable for Interconnect via a 155c IRN interface (for Inter-Regional-Network).
  • the 552c software component emulates access to TETRAPOL services or applications.
  • the 650c server based on a core 651 and the software components 553 and 654 remain respectively identical to those described above.
  • Figure 9a shows that a PTT call requires an upstream shared channel to access the server.
  • the server when it refers to broadcast on a shared channel or broadcast type.

Abstract

The invention relates to a radio-communication system (100) for Push-to-Talk applications, comprising: a narrow-band PMR-technology terminal (110) capable of connecting, via a radio-electric interface, to a narrow-band network infrastructure (120) for accessing, via a PTT server (150), a set of narrow-band PTT resources or applications (160); and a wide-band-technology terminal (210, 510, 610) capable of connecting, via a radio-electric interface, to an IP-WAN network (240) for accessing, via a server (265), a set of wide-band PTT resources or applications (260), wherein said terminal (210, 510, 610) comprises a client PTT application (215, 515, 615) on the IP-WAN network configured to establish an IP connection between the terminal (210, 510, 610) and a PTT server (250, 550, 550a, 550b, 550c, 650, 650a, 650b, 650c) over the IP-WAN via an interface (225, 525, 625a, 625b), such that said terminal (210, 510, 610) can access the narrow-band PTT resources or applications (160) and establish a communication channel with the terminal (110).

Description

SYSTEME DE RADIOCOMMUNICATION NUMERIQUE PERMETTANT L'EVOLUTION D'UNE INFRASTRUCTURE ET DE TERMINAUX A BANDE ETROITE VERS UNE INFRASTRUCTURE ET DES TERMINAUX A LARGE DIGITAL RADIOCOMMUNICATION SYSTEM FOR EVOLVING INFRASTRUCTURE AND NARROW TERMINALS TOWARDS INFRASTRUCTURE AND WIDE TERMINALS
BANDE BANDAGED
Domaine de l'invention Field of the invention
La présente invention se rapporte au domaine des systèmes numérique privés de radiocommunication mobile. Elle trouve des applications particulièrement avantageuses dans les systèmes privés de radiocommunication professionnelle (ou système PMR, pour Professional Mobile Radio en anglais).  The present invention relates to the field of private digital mobile radio systems. It finds particularly advantageous applications in the private systems of professional radiocommunication (or system PMR, for Professional Mobile Radio in English).
Ce système de radiocommunication selon l'invention a pour but de permettre l'établissement d'une liaison de communication entre un ensemble de terminaux de type Push To Talk (ou PTT) à bande étroite avec des terminaux de type PTT à large bande.  The purpose of this radio communication system according to the invention is to enable the establishment of a communication link between a set of narrow-band Push To Talk (PTT) terminals with broadband PTT type terminals.
Etat de la technique et problèmes techniques rencontrés  State of the art and technical problems encountered
Dans le domaine des systèmes numériques privés de radiocommunication mobile appelé par la suite système PMR, il existe une catégorie de terminaux mobiles utilisant une méthode de communication dite PTT (pour Push To Talk, ou Press To Transmit). Cette méthode de communication s'effectue sur une liaison half-duplex, et repose sur l'appui d'un bouton pour commuter le terminal PMR d'un état récepteur à un état émetteur de données, telles que la phonie, notamment, mais plus généralement de données de toute nature. On entend par liaison half-duplex un canal de communication permettant le transport de données dans les deux sens, mais pas simultanément, autrement dit, soit en lien montant (Up- link en anglais), ou soit en lien descendant (ou down-link en anglais).  In the field of private digital mobile radio systems subsequently called PMR system, there is a category of mobile terminals using a method of communication known as PTT (for Push To Talk, or Press To Transmit). This communication method is performed on a half-duplex link, and relies on the push of a button to switch the PMR terminal from a receiving state to a data transmitter state, such as voice, including, but not limited to generally of data of any kind. A half-duplex link is a communication channel that transports data in both directions, but not simultaneously, in other words, either as a rising link (Up-link in English) or as a downlink (or down-link). in English).
La méthode de communication Push To Talk est un service vocal sur IP (pour Internet Protocol) en temps réel implémenté sur un réseau de données par paquets. Ainsi, un terminal PTT assure une communication directe par appui d'une touche et permet d'établir une liaison avec un autre terminal ou avec un ensemble de terminaux.  The Push To Talk communication method is a real-time Internet Protocol (IP) voice service implemented over a packet data network. Thus, a PTT terminal provides direct communication by pressing a key and makes it possible to establish a connection with another terminal or with a set of terminals.
Les figures 1a-1c sont des illustrations d'un système 100 de radiocommunication généralement utilisé pour des terminaux PTT 1 10. Dans ce système 100 de radiocommunication, un terminal PTT 1 10 radiomobiie est de manière classique interfacé à une infrastructure réseau 120 via un ensemble de stations de base 130, chacunes associées à un contrôleur 135 de site. FIGS. 1a-1c are illustrations of a radio communication system 100 generally used for PTT terminals 1 10. In this radio communication system 100, a radiocommunication PTT terminal 10 is conventionally interfaced to a network infrastructure 120 via a network. set of base stations 130, each associated with a site controller 135.
Cette infrastructure réseau 120 comporte un ou plusieurs sous- systèmes 140 d'acheminement, encore appelé réseaux régionaux. Un sous- système 140 d'acheminement est considéré comme le plus petit sous- système pouvant offrir des services PMR 160 via un réseau IP 165. Chaque sous-système 140 comporte un commutateur encore appelé serveur PTT 150 apte à gérer la mobilité des terminaux PTT 110 sur le réseau et à assurer la communication entre les différents terminaux PTT 110 dudit réseau. Le serveur PTT 150 est également apte à s'interfacer à un ou plusieurs autres serveurs PTT 150, afin de permettre la mise en réseau de plusieurs sous-systèmes 140 entre eux et ainsi pouvoir couvrir une large zone géographique.  This network infrastructure 120 comprises one or more routing subsystems 140, also called regional networks. A routing subsystem 140 is considered to be the smallest subsystem that can offer PMR services 160 via an IP network 165. Each subsystem 140 includes a switch also called PTT server 150 able to manage the mobility of PTT terminals. 110 on the network and to ensure communication between the various PTT terminals 110 of said network. The PTT server 150 is also able to interface with one or more other PTT servers 150, in order to allow the networking of several subsystems 140 between them and thus be able to cover a large geographical area.
Toutefois, les infrastructures actuelles de radiocommunication en technologie PTT sont prévus pour des terminaux 110 fonctionnant sur du bas débit encore appelé à bande étroite (ou Narrow Band en anglais). Autrement dit, les services PMR 160 ne peuvent être accessible que pour des applications bas débit, or la modernisation de ces infrastructures de télécommunication PTT est nécessaire, afin de les faire évoluer en haut débit, encore appelé large bande (ou Broad Band en anglais).  However, the current PTT radiocommunication infrastructures are provided for terminals 110 operating on low bandwidth (or Narrow Band). In other words, the PMR 160 services can only be accessible for low-speed applications, but the modernization of these PTT telecommunications infrastructures is necessary, in order to make them evolve into broadband, also called broadband (or Broad Band). .
Cependant, cette modernisation est longue et complexe à mettre en œuvre. En outre, se pose également le problème de l'interopérabilité entre les deux réseaux, afin que puissent communiquer les terminaux 110 bas débits avec des terminaux hauts débits, et vice versa.  However, this modernization is long and complex to implement. In addition, there is also the problem of interoperability between the two networks, so that low bit rate terminals 110 can be communicated with high speed terminals, and vice versa.
Exposé de l'invention  Presentation of the invention
La présente invention vise à résoudre l'ensemble des inconvénients de l'état de la technique. Pour cela, l'invention propose un système de radiocommunication permettant l'interopérabilité entre un terminal PMR fonctionnant sur un réseau à large bande, selon l'une quelconque des caractéristiques de la revendication 1 et suivantes.  The present invention aims to solve all the disadvantages of the state of the art. For this, the invention proposes a radio communication system allowing interoperability between a PMR terminal operating on a broadband network, according to any one of the features of claim 1 and following.
L'invention permet ainsi d'établir, maintenir, et interrompre une liaison de communication vocal et/ou de données entre un terminal PTT (pour Push To Talk), destiné à fonctionner sur un réseau à bande étroite (ou Narrow Band), et un terminal comportant des applications PTT, destiné à fonctionner sur un réseau à large bande (ou Broad Band). L'invention est apte à fonctionner avec des infrastructures réseaux à bande étroite de technologie TETRA (pour Terrestrial Trunked RAdio), ou TETRAPOL (pour TErrestrial Trunked RAdio POLycom), ou P25 (Project 25). L'invention est également apte à fonctionner avec des réseaux à large bande de type IP-WAN (pour Internet Protocol Wide Area Networks). Par réseaux IP-WAN, on entend des réseaux se basant sur les technologies WIFI (Wlreless Fldelity), et/ou WIMAX (Worldwide Interoperability for Microwave Access), et/ou 2G (2ème Génération de réseau cellulaire), et/ou 3G (3eme Génération de réseau cellulaire), et/ou LTE (Long Term Evolution). The invention thus makes it possible to establish, maintain, and interrupt a voice and / or data communication link between a PTT terminal (for Push To Talk) intended to operate on a narrow band network (or Narrow Band), and a terminal with PTT applications, intended to operate on a broadband network (or Broad Band). The invention is capable of operating with narrowband network infrastructures of technology TETRA (for Terrestrial Trunked RAdio), or TETRAPOL (for TErrestrial Trunked RAdio POLycom), or P25 (Project 25). The invention is also capable of operating with broadband networks of the IP-WAN type (for Internet Protocol Wide Area Networks). IP-WAN networks are networks based on WIFI technologies (Wlreless Fldelity), and / or WIMAX (Worldwide Interoperability for Microwave Access), and / or 2G ( 2nd Generation of cellular network), and / or 3G (3rd generation cellular network) and / or LTE (Long Term Evolution).
L'invention permet donc à des terminaux à large bande d'accéder aux services ou applications qui sont normalement destinés aux terminaux à bande étroite. En effet, l'invention permet à un terminal fonctionnant sur des technologies IP-WAN d'accéder à des services supplémentaires, qui n'étaient réservés jusque là qu'à des terminaux PTT à bande étroite. Ainsi, grâce à l'invention, les infrastructures réseaux large bande et à bande étroite sont totalement interopérable. Un avantage de l'invention est que l'interopérabilité, entre les infrastructures réseaux à bande étroite et à large bande, est totalement indépendante de l'évolution future des terminaux IP- WAN, ou de toute autre évolution technologique de ces terminaux radiomobile large bande. L'invention permet également aux terminaux à large bande accédant à des services à bande étroite, d'accéder simultanément aux services à bande large.  The invention therefore allows broadband terminals to access services or applications that are normally intended for narrowband terminals. Indeed, the invention allows a terminal operating on IP-WAN technologies to access additional services, which were previously reserved only to PTT narrowband terminals. Thus, thanks to the invention, broadband and narrowband network infrastructures are fully interoperable. An advantage of the invention is that the interoperability between the narrowband and broadband network infrastructures is totally independent of the future evolution of IP-WAN terminals, or any other technological evolution of these broadband mobile radio terminals. . The invention also enables broadband terminals accessing narrowband services to simultaneously access broadband services.
L'invention a donc pour objet un système de radiocommunication destiné à des applications de type Push To Talk comportant :  The subject of the invention is therefore a radio communication system intended for Push To Talk type applications comprising:
- un terminal de technologie PMR à bande étroite, apte à se connecter, via une interface radioéiectrique, à une infrastructure réseau à bande étroite, permettant un accès, par l'intermédiaire d'un serveur PTT, à un ensemble de ressources ou applications PTT à bande étroite,  a narrowband PMR technology terminal capable of connecting, via a radio interface, to a narrowband network infrastructure, allowing access, via a PTT server, to a set of PTT resources or applications; narrowband,
- un terminal de technologie à large bande, apte à se connecter, via une interface radioéiectrique, à un réseau IP-WAN, permettant un accès, par l'intermédiaire d'un serveur, à un ensemble de ressources ou applications PTT à bande large,  a broadband technology terminal, capable of connecting, via a radio interface, to an IP-WAN network, allowing access, via a server, to a set of resources or broadband PTT applications ,
caractérisé en ce que,  characterized in that
- ledit terminal comporte une application cliente PTT sur le réseau IP- WAN, configuré de sorte à établir une connexion IP, via une interface, entre le terminal, et un serveur PTT sur IP-WAN, permettant audit terminal d'accéder aux ressources ou applications PTT à bande étroite et d'établir un canal de communication avec le terminal. said terminal comprises a PTT client application on the IP-WAN network, configured so as to establish an IP connection, via an interface, between the terminal, and a PTT server over IP-WAN, enabling said terminal access narrow-band PTT resources or applications and establish a communication channel with the terminal.
L'invention comporte également l'une quelconque des caractéristiques suivantes :  The invention also includes any of the following features:
- ledit serveur PTT sur IP-WAN est apte à se connecter, via une interface, à un serveur PTT d'une infrastructure réseau à bande étroite, et/ou à un autre serveur PTT sur IP-WAN ;  said IP-WAN PTT server is able to connect, via an interface, to a PTT server of a narrowband network infrastructure, and / or to another PTT server over IP-WAN;
- l'interface permettant la liaison entre le serveur PTT de l'infrastructure réseau à bande étroite et le serveur PTT sur IP-WAN comporte une passerelle, permettant de convertir le signal issu du serveur PTT de l'infrastructure réseau à bande étroite en un signal opérationnel pour le serveur PTT sur IP-WAN, et vice versa ;  the interface allowing the link between the PTT server of the narrowband network infrastructure and the PTT server on IP-WAN comprises a gateway, making it possible to convert the signal coming from the PTT server of the narrowband network infrastructure into a operational signal for the PTT server over IP-WAN, and vice versa;
- l'infrastructure réseau est apte à être de technologie TETRA, ou TETRAPOL, ou P25 ;  - the network infrastructure is capable of being TETRA technology, or TETRAPOL, or P25;
- le terminal est un téléphone cellulaire pourvu d'une application cliente PTT sur IP-WAN comportant un client logiciel PoC, associé à un composant logiciel donnant accès aux services ou applications PTT à bande étroite, ledit client PoC étant également associé à un composant logiciel donnant accès aux services ou applications PTT à bande large ;  the terminal is a cellular telephone provided with a PTT client application over IP-WAN comprising a PoC software client, associated with a software component giving access to narrowband PTT services or applications, said PoC client also being associated with a software component providing access to PTT broadband services or applications;
- le serveur PTT sur IP-WAN comporte un noyau basé sur un protocole OMA PoC et associé au client logiciel.  the PTT server over IP-WAN comprises a core based on an OMA PoC protocol and associated with the software client.
- le serveur comporte en outre un composant logiciel destiné à émuler la passerelle entre le serveur PTT et le noyau ;  the server further comprises a software component intended to emulate the gateway between the PTT server and the kernel;
- le serveur PTT sur IP-WAN comporte un noyau basé sur un protocole P25 PoC et associé au client logiciel ;  the PTT server over IP-WAN comprises a kernel based on a P25 PoC protocol and associated with the software client;
- le serveur PTT sur IP-WAN comporte un composant logiciel permettant de réaliser l'adaptation nécessaire pour le fonctionnement entre un client/serveur OMA et un client/serveur P25, afin qu'ils puissent réaliser ensemble une communication commune ;  - The PTT server on IP-WAN includes a software component for performing the adaptation necessary for operation between an OMA client / server and a client / server P25, so that they can achieve joint communication together;
- le serveur PTT sur IP-WAN est associé à :  - the PTT server on IP-WAN is associated with:
- un premier composant logiciel émulant l'accès à des services ou applications PTT à bande étroite,  a first software component emulating access to narrowband PTT services or applications,
- un deuxième composant logiciel émulant l'accès à des services ou applications PTT à large bande ;  a second software component emulating access to broadband PTT services or applications;
L'invention a également pour objet un terminal mobile comportant des applications de type Push To Talk configuré de sorte à pouvoir évoluer dans un système de radiocommunication selon l'une quelconque des caractéristiques précédentes. The invention also relates to a mobile terminal comprising Push To Talk type applications configured to be able to evolve in a radio communication system according to any one of the preceding features.
Brève description des figures  Brief description of the figures
L'invention sera mieux comprise à la lecture de la description qui suit et à l'examen des figures qui l'accompagnent. Celles-ci ne sont présentées qu'à titre illustratif, mais nullement limitatif de l'invention. Les figures montrent :  The invention will be better understood on reading the description which follows and on examining the figures which accompany it. These are presented for illustrative purposes, but in no way limitative of the invention. The figures show:
- Figures 1a-1c : des représentations schématiques de systèmes de télécommunication, selon l'état de la technique ; (déjà décrites)  - Figures 1a-1c: schematic representations of telecommunication systems, according to the state of the art; (already described)
- Figures 2a-2b : des représentations schématiques de systèmes de radiocommunication, selon un mode de réalisation de l'invention ;  - Figures 2a-2b: schematic representations of radiocommunication systems, according to one embodiment of the invention;
- Figure 3 : une représentation fonctionnelle du système de radiocommunication, selon un mode de réalisation de l'invention ;  FIG. 3: a functional representation of the radiocommunication system, according to one embodiment of the invention;
- Figures 4 à 6 : des représentations schématiques de d'autres modes de réalisation de l'invention ;  - Figures 4 to 6: schematic representations of other embodiments of the invention;
- Figure 7 : un ensemble de représentations schématiques du système selon un Mode 1 de réalisation de l'invention, muni d'un serveur OMA PoC et adapté respectivement aux protocoles P25, TETRA, TETRAPOL.  - Figure 7: a set of schematic representations of the system according to a Mode 1 embodiment of the invention, provided with an OMA PoC server and adapted respectively to the protocols P25, TETRA, TETRAPOL.
- Figure 8 : un ensemble de représentations schématiques du système selon un Mode 2 de réalisation de l'invention, muni d'un serveur P25 PoC et adapté respectivement aux protocoles P25, TETRA, TETRAPOL.  - Figure 8: a set of schematic representations of the system according to a Mode 2 of embodiment of the invention, provided with a P25 server PoC and adapted respectively to the protocols P25, TETRA, TETRAPOL.
- Figure 9a-9b : représentations schématiques comparant la chaîne de management du système selon un mode de réalisation de l'invention et l'état de la technique.  FIGS. 9a-9b: schematic representations comparing the management system of the system according to one embodiment of the invention and the state of the art.
Description de l'invention  Description of the invention
On note dès à présent que les figures ne sont pas à l'échelle.  It is already noted that the figures are not to scale.
Les réalisations suivantes sont des exemples. Bien que la description se réfère à un ou plusieurs modes de réalisation, ceci ne signifie pas nécessairement que chaque référence concerne le même mode de réalisation, ou que les caractéristiques s'appliquent seulement à un seul mode de réalisation. De simples caractéristiques de différents modes de réalisation peuvent également être combinées pour fournir d'autres réalisations.  The following achievements are examples. Although the description refers to one or more embodiments, this does not necessarily mean that each reference relates to the same embodiment, or that the features apply only to a single embodiment. Simple features of different embodiments may also be combined to provide other embodiments.
La figure 2a est une illustration d'un système de radiocommunication PMR selon l'invention. Ce système de radiocommunication PMR comporte un terminal PTT 110 radiomobile interfacé à une infrastructure réseau 120 via un ensemble de stations de base 130. Cette infrastructure réseau 120 comporte un ensemble de sous-systèmes d'acheminement, encore appelé réseaux régionaux 140. Figure 2a is an illustration of a PMR radiocommunication system according to the invention. This PMR radiocommunication system comprises a radio-controlled PTT terminal 110 interfaced to a network infrastructure 120 via a set of base stations 130. This network infrastructure 120 comprises a set of routing subsystems, also called regional networks 140.
Par sous-système d'acheminement 140, on comprend qu'il s'agit du plus petit sous-système pouvant offrir des services PMR.  By routing sub-system 140, it is understood that it is the smallest subsystem that can offer PMR services.
Chaque sous-système 140 comporte un commutateur, encore appelé serveur PTT 150, apte à gérer la mobilité des terminaux 110 sur le réseau et à assurer la communication entre les différents terminaux PTT 110 dudit réseau. Le serveur PTT 150 est apte à se connecter à d'autres serveurs PTT 150 de sous-système 140, via une interface 155. De ce fait, les sous- systèmes 140 sont aptes à se connecter entre eux de sorte à couvrir une large zone géographique. Dans un mode de réalisation, le serveur PTT 150 est de technologie P25 (pour Project 25). Dans une autre variante de réalisation de l'invention, le serveur PTT 150 est de technologie TETRA (TErrestrial Trunked RAdio). Dans encore une autre variante de réalisation, le serveur PTT 150 est de technologie TETRAPOL (pour TETRA POLice).  Each subsystem 140 includes a switch, also called PTT server 150, able to manage the mobility of the terminals 110 on the network and to ensure communication between the various PTT terminals 110 of said network. The PTT server 150 is able to connect to other PTT servers 150 of subsystem 140 via an interface 155. As a result, the subsystems 140 are able to connect with each other so as to cover a large area. geographical. In one embodiment, the PTT server 150 is of P25 technology (for Project 25). In another variant embodiment of the invention, the PTT server 150 is of TETRA technology (TErrestrial Trunked RAdio). In yet another variant embodiment, the PTT server 150 is of TETRAPOL technology (for TETRA POLice).
Cependant, ces infrastructures réseaux 120, telles que définies dans l'état de la technique, ne sont uniquement prévus que pour des terminaux 110 fonctionnant sur du bas débit, encore appelé terminaux à bande étroite (ou Narrow Band en anglais).  However, these network infrastructures 120, as defined in the state of the art, are only intended for terminals 110 operating on low-speed, also called narrow-band terminals (or Narrow Band in English).
Or la modernisation des terminaux mobiles 210 permet d'accéder à des réseaux de technologie IP-WAN. On entend par technologie IP-WAN (Internet Protocol Wide Area Network), des technologies radioélectriques larges bandes ou hauts débits, tels que du LTE (Long Term Evolution), et/ou du 3G (3ème Génération de réseau cellulaire), et/ou du 2G (2ème Génération de réseau cellulaire), et/ou du WIMAX (Worldwide Interoperability for Microwave Access), et/ou du WIFI (Wireless Fidelity). Un tel terminal 210 IP- WAN est apte à accéder à des services ou des applications 260 tels que de la vidéo, de l'internet, e-mails, etc. , et/ou tout autre service destiné à de la large bande via un serveur 265 de données BB (pour Broad Band). Dans le cadre d'une utilisation du terminal 210 pour une application PMR et basée sur de la technologie IP-WAN, comme illustré à la figure 2a, le terminal 210 se connecte au serveur 265, via un ensemble de stations de base 230, donnant accès a un réseau IP-WAN 240. Or the modernization of mobile terminals 210 provides access to IP-WAN technology networks. IP WAN by technology means Internet Protocol (Wide Area Network), radio broadband or broadband technologies such as LTE (Long Term Evolution), and / or 3G (3rd Cellular Network Generation), and / or 2G ( 2nd Generation Cellular Network), and / or WIMAX (Worldwide Interoperability for Microwave Access), and / or WIFI (Wireless Fidelity). Such an IP-WAN terminal 210 is able to access services or applications 260 such as video, internet, e-mails, etc. , and / or any other service intended for broadband via a server 265 of data BB (for Broad Band). In the context of using the terminal 210 for a PMR application and based on IP-WAN technology, as illustrated in FIG. 2a, the terminal 210 connects to the server 265, via a set of base stations 230, giving access to an IP-WAN network 240.
Toutefois, il serait totalement impossible en l'état actuel des choses qu'un terminal 210 puisse établir une communication avec un terminal 10, ainsi que d'avoir la possibilité d'utiliser les applications 160 destinées aux dits terminaux 110. However, it would be totally impossible in the present state of things for a terminal 210 to establish communication with a terminal 10, as well as having the possibility of using the applications 160 intended for said terminals 110.
Ainsi, l'invention prévoit, d'une part, qu'un tel terminal IP-WAN 210 comporte une application cliente 215 PTT sur le réseau IP-WAN et que d'autre part, un serveur 250 soit mis en place, de sorte que l'exécution de l'application cliente 215 crée une interface client/serveur 225 permettant l'accès aux services PTT 160 via le réseau IP-WAN 240.  Thus, the invention provides, on the one hand, that such an IP-WAN terminal 210 comprises a client application PTT 215 on the IP-WAN network and that on the other hand, a server 250 is set up, so the execution of the client application 215 creates a client / server interface 225 allowing access to PTT services 160 via the IP-WAN network 240.
En effet, le serveur 250, émule une imitation du comportement physique d'un serveur PTT 150 par un logiciel apte à se connecter avec un serveur PTT 150 réel via une interface 155.  Indeed, the server 250 emulates an imitation of the physical behavior of a PTT server 150 by software able to connect with a real PTT server 150 via an interface 155.
De même, comme le montre les figure 2b et 3, le serveur 250 est apte à se connecter à un ou plusieurs autre(s) serveur(s) 250, via une interface 255.  Similarly, as shown in FIGS. 2b and 3, the server 250 is able to connect to one or more other server (s) 250 via an interface 255.
Par conséquent, l'interface client/serveur 225 permet aux terminaux 210 d'accéder aux applications 160 et/ou aux applications 260 accessibles via le serveur 265. L'interface 225 permet en outre aux terminaux 210 d'établir une liaison de communication avec un ou plusieurs terminaux 110. De même, les terminaux 110 sont aptes au moyen de l'interface 225 d'établir une liaison de communication avec un ou plusieurs terminaux 210. Toutefois les terminaux 110 n'ont pas la possibilité d'accéder aux ressources ou applications 260 large bande accessible uniquement par le serveur 265.  Consequently, the client / server interface 225 allows the terminals 210 to access the applications 160 and / or the applications 260 accessible via the server 265. The interface 225 further allows the terminals 210 to establish a communication link with one or more terminals 110. Similarly, the terminals 110 are able by means of the interface 225 to establish a communication link with one or more terminals 210. However the terminals 110 do not have the possibility to access the resources or broadband applications accessible only by the server 265.
L'invention est apte à fonctionner avec des infrastructures réseau 120 de technologie TETRA (pour Terrestrial Trunked RAdio), ou TETRAPOL (pour TErrestrial Trunked RAdio POLycom), ou P25 (pour Project 25) et leurs terminaux 110 respectifs. Ainsi, dans un premier mode de réalisation, il est prévu que le serveur PTT 150, associé à la technologie de l'infrastructure 120, puisse communiquer de manière bidirectionnelle avec le serveur PTT sur IP-WAN, par l'intermédiaire d'une passerelle 454. Cette passerelle 454 a pour but de convertir le signal issu du serveur PTT 150 en un signal opérationnel pour le serveur PTT 250 sur IP-WAN, et vice versa (voir figure 4).  The invention is capable of operating with network infrastructures 120 of TETRA technology (for Terrestrial Trunked RAdio), or TETRAPOL (for TErrestrial Trunked RAdio POLycom), or P25 (for Project 25) and their respective terminals 110. Thus, in a first embodiment, it is provided that the PTT server 150, associated with the technology of the infrastructure 120, can communicate bidirectionally with the PTT server over IP-WAN, via a gateway. 454. This gateway 454 is intended to convert the signal from the PTT server 150 into an operational signal for the PTT server 250 over IP-WAN, and vice versa (see FIG. 4).
Dans un autre mode de réalisation selon l'invention, (voir figure 5), un terminal utilisateur 510 est un téléphone cellulaire, dit mobile. Ce téléphone cellulaire 510 est pourvu d'une application cliente 515 PTT sur IP-WAN comportant un client logiciel 511 PTT sur téléphone cellulaire, généralement appelé PoC client, (ou PTT Over Cellular en anglais). Ce client logiciel 511 PTT est associé à un composant logiciel 512 donnant accès aux services ou applications PTT à bande étroite (Narrow Band ou NB en anglais). In another embodiment according to the invention (see FIG. 5), a user terminal 510 is a mobile telephone. This cell phone 510 is provided with a 515 PTT client application on IP-WAN comprising a 511 PTT software client on a cellular telephone, generally called a PoC client (or PTT Over Cellular in English). This software client 511 PTT is associated with a software component 512 giving access to services or applications PTT narrowband (Narrow Band or NB).
De même, le client logiciel 511 est associé à un composant logiciel 513 donnant accès aux services ou applications PTT à bande large (Broad Band ou BB en anglais). Le client logiciel 51 est apte à entrer en contact avec un serveur 550, ayant les mêmes entrées/sorties que le serveur 250 précédemment décrit. Le serveur 550 comporte un noyau 551 PTT sur téléphone cellulaire (ou PoC Kernel en anglais) apte à fonctionner sur un réseau IP-WAN. Ce noyau 551 est associé à un premier composant logiciel 552 émulant l'accès à des services ou applications PTT Narrow Band. Le noyau 551 comporte également un deuxième composant 553 logiciel émulant l'accès à des services ou applications PTT Broad Band. Le serveur 550 comporte en outre un composant 554 logiciel destiné à émuler la passerelle 400 entre le serveur PTT 150 et le noyau 551.  Similarly, the software client 511 is associated with a software component 513 giving access to services or PTT applications broadband (Broad Band or BB in English). The software client 51 is able to come into contact with a server 550, having the same inputs / outputs as the server 250 previously described. The server 550 comprises a 551 PTT core on a cellular telephone (or PoC Kernel in English) capable of operating on an IP-WAN network. This core 551 is associated with a first software component 552 emulating access to services or applications PTT Narrow Band. Core 551 also includes a second software component 553 emulating access to PTT Broad Band services or applications. The server 550 further comprises a software component 554 for emulating the gateway 400 between the PTT server 150 and the core 551.
Deux autres modes de réalisation, illustrés à la figure 6, respectivement appelés Mode 1 et Mode 2, découlent du mode de réalisation selon la figure 5.  Two other embodiments, illustrated in FIG. 6, respectively called Mode 1 and Mode 2, result from the embodiment according to FIG.
En effet, dans le premier Mode 1 de réalisation, le téléphone cellulaire 510 est pourvu d'un client logiciel 511 PTT sur téléphone cellulaire basé sur la norme OMA (pour Open Mobile Alliance). La norme OMA est une norme organique qui définit des normes pour les réseaux PoC. Les normes OMA PoC, ont permis de déterminer des règles pour contrôler l'initialisation de la transmission des appels de PTTs dans les réseaux PoC. Dans l'exemple tel qu'illustré au Mode 1 de la figure 6, le composant logiciel 512, donnant accès aux services ou applications PTT à bande étroite, est de type P25. Le composant logiciel 513 restant inchangé par rapport à celui de la figure 5. Ainsi, le terminal 510 selon le Mode 1 est apte à établir une connection 525, au travers d'un accès à un réseau 240 IP-WAN, au serveur 550 basé sur un noyau 551 OMA PoC. Dans le Mode 1 , l'interface 525 permettant la liaison entre le client logiciel 511 et le serveur 550 est basé sur le protocole Serveur/Client OMA PoC V2.1. Le composant logiciel 554 émule une passerelle PTT basée sur le protocole P25, et destiné à communiquer avec un serveur 150 PTT P25. L'interface permettant une telle interconnexion est basée sur le P25 et est définie comme étant une interface entre sous système, généralement appelé ISSI (pour Inter-Sub-Système Interface en anglais). L'interface ISSI est définie comme étant apte à déterminer des règles pour contrôler l'initialisation de la transmission des appels de PTTs dans les réseaux P25. Le composant logiciel 552 est quand à lui, dans cet exemple du Mode 1 , configuré de sorte à émuler l'accès aux services PTT basé sur du P25. Indeed, in the first embodiment 1 embodiment, the cell phone 510 is provided with a 511 PTT software client on cell phone based on the OMA (Open Mobile Alliance). The OMA standard is an organic standard that defines standards for PoC networks. The OMA PoC standards have established rules for controlling the initialization of PTT call transmission in PoC networks. In the example as illustrated in Mode 1 of FIG. 6, the software component 512, giving access to narrowband PTT services or applications, is of the P25 type. The software component 513 remains unchanged from that of FIG. 5. Thus, the terminal 510 according to Mode 1 is able to establish a connection 525, through an access to a network 240 IP-WAN, to the server 550 based on on a 551 OMA PoC core. In Mode 1, the interface 525 allowing the link between the software client 511 and the server 550 is based on the OMA PoC server / client protocol V2.1. The software component 554 emulates a PTT gateway based on the P25 protocol, and intended to communicate with a P25 PTT server 150. The interface allowing such interconnection is based on the P25 and is defined as an interface between subsystem, usually called ISSI (for Inter-Sub-System Interface in English). The ISSI interface is defined as being able to determine rules for controlling the initialization of the transmission of PTT calls in P25 networks. The software component 552 is in turn, in this example of Mode 1, configured to emulate access to PTT services based on P25.
La figure 7 a ceci d'intéressant, en ce qu'elle permet de comprendre assez rapidement les évolutions à adapter au Mode 1 de la figure 6 pour obtenir un système équivalent compatible avec les technologies TETRA ou TETRAPOL. En effet, comme vu précédemment, lorsque le serveur PTT 150a est basé sur du P25, autrement dit, que le RFSS est basé sur du P25, la passerelle 554a est basée sur la technologie P25 et est apte à s'interconnecter via l'interface 155a ISSI. Le composant logiciel 552a émule, quand à lui, un accès aux services ou applications PTT P25. Le serveur 550a est lui basé sur un noyau 551 OMA PoC et permet l'accès via le composant logiciel 553 aux services ou applications PTT Broad Band.  Figure 7 has this interesting, in that it allows to understand fairly quickly the developments to adapt to Mode 1 of Figure 6 to obtain an equivalent system compatible with TETRA or TETRAPOL technologies. Indeed, as seen above, when the PTT server 150a is based on P25, in other words, the RFSS is based on the P25, the gateway 554a is based on the P25 technology and is able to interconnect via the interface. 155a ISSI. The software component 552a emulates, when he, access to PTT P25 services or applications. The server 550a is based on a 551 OMA PoC kernel and allows access via the software component 553 to PTT Broad Band services or applications.
De manière équivalente, lorsque le serveur PTT 150b est basé sur la technologie TETRA, autrement dit, le RFSS est basé sur du TETRA, la passerelle 554b est basée sur la technologie TETRA et est apte à s'interconnecter via une interface 155b ISI (pour Inter-System- Interconnexion). Le composant logiciel 552b émule un accès aux services ou applications TETRA. Le noyau 551 et le composant logiciel 553 restent, quand à eux, respectivement identiques à ceux décrit précédemment.  Equally, when the PTT 150b server is based on TETRA technology, in other words, the RFSS is based on TETRA, the 554b gateway is based on TETRA technology and is able to interconnect via a 155b ISI interface (for Inter-System- Interconnection). The 552b software component emulates access to TETRA services or applications. The core 551 and the software component 553 remain, when they are respectively identical to those described above.
Le principe est complètement identique lorsqu'il s'agit d'un serveur PTT 150c, basé sur la technologie TETRAPOL, autrement dit, le RFSS est basé sur du TETRAPOL, la passerelle 554c est basée sur la technologie TETRAPOL et est apte à s'interconnecter via une interface 155c IRN (pour Inter-Regional-Network). Le composant logiciel 552c émule un accès aux services ou applications TETRAPOL. Le noyau 551 et le composant logiciel 553 restent respectivement identiques à ceux décrit précédemment.  The principle is completely identical when it is a PTT 150c server, based on TETRAPOL technology, that is, the RFSS is based on TETRAPOL, the 554c gateway is based on TETRAPOL technology and is suitable for Interconnect via a 155c IRN interface (for Inter-Regional-Network). The 552c software component emulates access to TETRAPOL services or applications. The core 551 and the software component 553 remain respectively identical to those described above.
Dans le deuxième Mode 2 de réalisation, le téléphone cellulaire 610 est pourvu d'une application cliente 615 PTT sur IP-WAN comportant un client logiciel 611 PTT sur téléphone cellulaire basé sur la norme P25 PoC. Dans l'exemple tel qu'illustré au Mode 2 de la figure 6, les composants logiciel 512 et 513 restent respectivement identique à ceux du Mode 1. Ainsi, le terminal 610 selon le Mode 2 est apte à établir une première 625a et une deuxième 625b connections, au travers d'un accès à un réseau 240 IP-WAN, à un serveur 650 basé sur un noyau 651 P25 PoC. Dans quel but le serveur 650 est il basé sur un noyau 651 P25 PoC ? C'est uniquement parce que la technologie PTT sur P25 est nativement IP (SIP/RTP) et que les technologies de données Broad Band tel que le GPRS 3G, la 3G, le Wimax et le Wifi, sont également basé sur le protocole IP. Du coup les adaptations nécessaires sont moins complexes à mettre en œuvre. In the second embodiment 2, the cell phone 610 is provided with a client application 615 PTT over IP-WAN comprising a 611 PTT client software on a cellular telephone based on the P25 PoC standard. In the example as illustrated in Mode 2 of FIG. 6, the software components 512 and 513 remain respectively identical to those of the Mode 1. Thus, the terminal 610 according to the Mode 2 is able to establish a first 625a and a second 625b connections, through access to a network 240 IP-WAN, to a server 650 based on a core 651 P25 PoC. For what purpose the server 650 is it based on a core 651 P25 PoC? It is only because the PTT technology on P25 is natively IP (SIP / RTP) and Broad Band data technologies such as 3G GPRS, 3G, Wimax and Wifi, are also based on the IP protocol. As a result, the necessary adaptations are less complex to implement.
Dans le Mode 2, les interfaces 625a, 625b permettant la liaison entre le client logiciel 611 et le serveur 650 sont basées sur un protocole SCI (pour Subscriber Client Interface). Le protocole SCI hérite complètement des propriétés du protocole ISSI, telle que la propriété SIP/RTP sur IP (pour Internet Protocol). Ainsi, l'interface 625a est utilisée comme canal de transmission à bande étroite (Narrow Band) pour le protocole Serveur/Client. De même, l'interface 625b est utilisée comme canal de transmission large bande (Broad Band).  In Mode 2, the interfaces 625a, 625b allowing the link between the software client 611 and the server 650 are based on a SCI protocol (for Subscriber Client Interface). The SCI protocol inherits all the properties of the ISSI protocol, such as the SIP / RTP over IP (Internet Protocol) property. Thus, the 625a interface is used as a Narrow Band for the Server / Client protocol. Similarly, the 625b interface is used as a broadband transmission channel.
Le serveur 650, du fait de son noyau 651 basé sur le protocole P25 PoC, est apte à s'interconnecter avec le serveur PTT 150 via une interface ISSI et sans passerelle. Toutefois, pour s'interconnecter avec d'autres éléments du réseau, le serveur 650 utilise un composant logiciel qui émule une passerelle 654 basée sur le protocole OMA. En effet, si on désire interopérer des clients/serveur OMA, avec des clients/serveur P25, dans une même communication PTT, une telle passerelle 654 permet de réaliser l'adaptation nécessaire pour le fonctionnement (ou Inter-WorKing en anglais) entre les deux serveurs, pour réaliser une communication commune. L'interface permettant une telle interconnexion est basée sur le protocole OMA IWK (pour Inter-WorKing). Les composants logiciels 552 et 553 restent respectivement inchangés par rapport à ceux du Mode 1.  The server 650, because of its core 651 based on the P25 PoC protocol, is able to interconnect with the PTT server 150 via an ISSI interface and without gateway. However, to interconnect with other elements of the network, the server 650 uses a software component that emulates a gateway 654 based on the OMA protocol. Indeed, if one wishes to interoperate OMA clients / server, with clients / server P25, in the same PTT communication, such a gateway 654 makes it possible to perform the adaptation necessary for the operation (or Inter-WorKing in English) between two servers, to achieve a common communication. The interface allowing such an interconnection is based on the OMA IWK protocol (for Inter-WorKing). Software components 552 and 553 remain respectively unchanged from those of Mode 1.
La figure 8, permet de comprendre assez rapidement les évolutions à adapter au Mode 2 de la figure 6 pour obtenir un système équivalent compatible avec les technologies TETRA ou TETRAPOL. En effet, comme vu précédemment, lorsque le serveur PTT 150a est basé sur du P25, autrement dit, que le RFSS est basé sur du P25, la passerelle 554a est basée sur la technologie P25 et est apte à s'interconnecter via l'interface 155a ISSI. Le composant logiciel 552a émule, quand à lui, un accès aux services ou applications PTT P25. Le serveur 650a est lui basé sur un noyau Figure 8, allows to understand quite quickly the developments to adapt to Mode 2 of Figure 6 to obtain an equivalent system compatible with TETRA or TETRAPOL technologies. Indeed, as seen above, when the PTT server 150a is based on P25, in other words, the RFSS is based on the P25, the gateway 554a is based on the P25 technology and is able to interconnect via the interface. 155a ISSI. The software component 552a emulates, when he, access to PTT P25 services or applications. The 650a server is based on a kernel
651 PoC P25 et permet l'accès via le composant logiciel 553 aux services ou applications PTT Broad Band. Le serveur 650a est apte à s'interconnecter avec d'autre composant logiciel via la passerelle 654. De manière équivalente, lorsque le serveur PTT 50b est basé sur la technologie TETRA, autrement dit, que le RFSS est basé sur du TETRA, la passerelle 554b est basée sur la technologie TETRA et est apte à s'interconnecter via une interface 155b ISI (pour Inter-System- Interconnexion). Le composant logiciel 552b émule un accès aux services ou applications TETRA. Le serveur 650b basé sur un noyau 651 et les composants logiciels 553 et 654, restent, quand à eux, respectivement identiques à ceux décrit précédemment. 651 PoC P25 and provides access via software component 553 to PTT Broad Band services or applications. The server 650a is able to interconnect with other software component via the gateway 654. Equally, when the PTT 50b server is based on TETRA technology, that is, the RFSS is based on TETRA, the 554b gateway is based on TETRA technology and is able to interconnect via a 155b ISI interface ( for Inter-System-Interconnection). The 552b software component emulates access to TETRA services or applications. The 650b server based on a core 651 and the software components 553 and 654 remain, when they are respectively identical to those described above.
Le principe est complètement identique lorsqu'il s'agit d'un serveur PTT 150c, basé sur la technologie TETRAPOL, autrement dit, le RFSS est basé sur du TETRAPOL, la passerelle 554c est basée sur la technologie TETRAPOL et est apte à s'interconnecter via une interface 155c IRN (pour Inter-Regional-Network). Le composant logiciel 552c émule un accès aux services ou applications TETRAPOL. Le serveur 650c basé sur un noyau 651 et les composants logiciels 553 et 654, restent respectivement identiques à ceux décrit précédemment.  The principle is completely identical when it is a PTT 150c server, based on TETRAPOL technology, that is, the RFSS is based on TETRAPOL, the 554c gateway is based on TETRAPOL technology and is suitable for Interconnect via a 155c IRN interface (for Inter-Regional-Network). The 552c software component emulates access to TETRAPOL services or applications. The 650c server based on a core 651 and the software components 553 and 654 remain respectively identical to those described above.
La figure 9a montre qu'une communication PTT nécessite un canal partagé montant pour accéder au serveur. Le serveur, quand à lui, renvoie en broadcast sur un canal partagé ou de type broadcast.  Figure 9a shows that a PTT call requires an upstream shared channel to access the server. The server, when it refers to broadcast on a shared channel or broadcast type.
La figure 9b montre que pour réaliser un système équivalent avec un Figure 9b shows that to achieve an equivalent system with a
PTT sur IP-WAN, comme il n'y a pas de canaux de données partagées montants en larges bandes, alors une connexion unicast est réalisée entre chaque utilisateur du canal montant et le serveur pour gérer la signalisation et le ou les média(s). PTT on IP-WAN, as there is no ubiquitous shared data channels in broadband, then a unicast connection is made between each uplink channel user and the server to handle the signaling and the media (s) .

Claims

REVENDICATIONS
1 - Système de radiocommunication (100) destiné à des applications de type Push To Talk comportant : 1 - Radio communication system (100) for Push To Talk type applications comprising:
- un terminal (110) de technologie PMR à bande étroite, apte à se connecter, via une interface radioélectrique, à une infrastructure réseau (120) à bande étroite, permettant un accès, par l'intermédiaire d'un serveur (150) PTT, à un ensemble de ressources ou applications (160) PTT à bande étroite,  a narrow-band PMR terminal (110) capable of connecting via a radio interface to a narrow-band network infrastructure (120) allowing access via a PTT server (150); , to a set of narrow-band PTT resources or applications (160),
- un terminal (210, 510, 610) de technologie à large bande, apte à se connecter, via une interface radioélectrique, à un réseau (240) IP-WAN, permettant un accès, par l'intermédiaire d'un serveur (265), à un ensemble de ressources ou applications (260) PTT à bande large,  a broadband technology terminal (210, 510, 610) capable of connecting, via a radio interface, to an IP-WAN network (240), allowing access, via a server (265); ), to a set of broadband PTT resources or applications (260),
caractérisé en ce que,  characterized in that
- ledit terminal (210, 510, 610) comporte une application cliente (215, said terminal (210, 510, 610) comprises a client application (215,
515, 615) PTT sur le réseau IP-WAN, configuré de sorte à établir une connexion IP, via une interface (225, 525, 625a, 625b), entre le terminal (210, 510, 610), et un serveur (250, 550, 550a, 550b, 550c, 650, 650a, 650b, 650c) PTT sur IP-WAN, permettant audit terminal (210, 510, 610) d'accéder aux ressources ou applications PTT (160) à bande étroite et d'établir un canal de communication avec le terminal (110). 515, 615) PTT over the IP-WAN network, configured to establish an IP connection, via an interface (225, 525, 625a, 625b), between the terminal (210, 510, 610), and a server (250 , 550, 550a, 550b, 550c, 650, 650a, 650b, 650c) PTT over IP-WAN, enabling said terminal (210, 510, 610) to access narrowband PTT resources or applications (160). establishing a communication channel with the terminal (110).
2 - Système de radiocommunication (100) selon la revendication 1 , caractérisé en ce que ledit serveur (250, 550, 550a, 550b, 550c, 650, 650a, 650b, 650c) PTT sur IP-WAN est apte à se connecter, via une interface (155, 155a, 155b, 155c), à un serveur (150, 150a, 150b, 150c) PTT d'une infrastructure réseaux (120) à bande étroite, et/ou à un autre serveur (250, 550, 550a, 550b, 550c, 650, 650a, 650b, 650c) PTT sur IP-WAN.  2 - radiocommunication system (100) according to claim 1, characterized in that said server (250, 550, 550a, 550b, 550c, 650, 650a, 650b, 650c) PTT over IP-WAN is able to connect via an interface (155, 155a, 155b, 155c) to a server (150, 150a, 150b, 150c) PTT of a narrowband network infrastructure (120), and / or another server (250, 550, 550a) , 550b, 550c, 650, 650a, 650b, 650c) PTT over IP-WAN.
3 - Système de radiocommunication (100) selon la revendication 1 ou 2, caractérisé en ce que l'interface (155, 155a, 155b, 155c) permettant la liaison entre le serveur (150, 150a, 150b, 150c) et le serveur (250, 550, 550a, 550b, 550c, 650, 650a, 650b, 650c) comporte une passerelle (454, 554, 554a, 554b, 554c), permettant de convertir le signal issu du serveur PTT (150, 150a, 150b, 150c) en un signal opérationnel pour le serveur (250, 550, 550a, 550b, 550c, 650, 650a, 650b, 650c) PTT sur IP-WAN, et vice versa. 4 - Système de radiocommunication ( 00) selon l'une quelconque des revendications précédentes, caractérisé en ce que l'infrastructure réseau (120) est apte à être de technologie TETRA, ou TETRAPOL, ou P25. 3 - radiocommunication system (100) according to claim 1 or 2, characterized in that the interface (155, 155a, 155b, 155c) allowing the connection between the server (150, 150a, 150b, 150c) and the server ( 250, 550, 550a, 550b, 550c, 650, 650a, 650b, 650c) includes a gateway (454, 554, 554a, 554b, 554c) for converting the signal from the PTT server (150, 150a, 150b, 150c ) into an operational signal for the server (250, 550, 550a, 550b, 550c, 650, 650a, 650b, 650c) PTT over IP-WAN, and vice versa. 4 - Radiocommunication system (00) according to any one of the preceding claims, characterized in that the network infrastructure (120) is capable of being TETRA technology, or TETRAPOL, or P25.
5 - Système de radiocommunication (100) selon l'une quelconque des revendications précédentes, caractérisé en ce que le terminal (510, 610) est un téléphone cellulaire pourvu d'une application cliente (515, 615) PTT sur IP-WAN comportant un client logiciel (511 , 611) PoC, associé à un composant logiciel (512) donnant accès aux services ou applications PTT à bande étroite, ledit client PoC (511 , 611) étant également associé à un composant logiciel (513) donnant accès aux services ou applications PTT à bande large.  5 - Radio communication system (100) according to any one of the preceding claims, characterized in that the terminal (510, 610) is a cellular telephone provided with a client application (515, 615) PTT over IP-WAN comprising a software client (511, 611) PoC associated with a software component (512) providing access to narrowband PTT services or applications, said PoC client (511, 611) also being associated with a software component (513) providing access to the services or broadband PTT applications.
6 - Système de radiocommunication (100) selon la revendication 5, caractérisé en ce que le serveur (550, 550a, 550b, 550c) comporte un noyau (551) basé sur un protocole OMA PoC et associé au client logiciel (511).  6 - radiocommunication system (100) according to claim 5, characterized in that the server (550, 550a, 550b, 550c) comprises a core (551) based on an OMA PoC protocol and associated with the software client (511).
7 - Système de radiocommunication (100) selon la revendication 6, caractérisé en ce que le serveur (550, 550a, 550b, 550c) comporte en outre un composant 554 logiciel destiné à émuler la passerelle (454) entre le serveur PTT (150, 150a, 150b, 150c) et le noyau (551 , 551a, 551b, 551c).  7 - A radio communication system (100) according to claim 6, characterized in that the server (550, 550a, 550b, 550c) further comprises a software component 554 for emulating the gateway (454) between the PTT server (150, 150a, 150b, 150c) and the core (551, 551a, 551b, 551c).
8 - Système de radiocommunication (100) selon la revendication 5, caractérisé en ce que le serveur (650, 650a, 650b, 650c) comporte un noyau 8 - radio communication system (100) according to claim 5, characterized in that the server (650, 650a, 650b, 650c) comprises a core
(651) basé sur un protocole P25 PoC et associé au client logiciel (611). (651) based on a P25 PoC protocol and associated with the software client (611).
9 - Système de radiocommunication (100) selon la revendication 8, caractérisé en ce que le serveur (650, 650a, 650b, 650c) comporte un composant logiciel (654) permettant de réaliser l'adaptation nécessaire pour le fonctionnement entre un client (511)/serveur (551) OMA et un client (611)/serveur (651) P25, afin qu'ils puissent réaliser ensemble une communication commune.  9 - radiocommunication system (100) according to claim 8, characterized in that the server (650, 650a, 650b, 650c) comprises a software component (654) for performing the adaptation necessary for operation between a client (511). ) / server (551) OMA and a client (611) / server (651) P25, so that they can achieve a common communication together.
10 - Système de radiocommunication (100) selon la revendication 6 à 8, caractérisé en ce que le serveur (550, 550a, 550b, 550c, 650, 650a, 650b, 650c) est associé à  10 - Radio communication system (100) according to claim 6 to 8, characterized in that the server (550, 550a, 550b, 550c, 650, 650a, 650b, 650c) is associated with
- un premier composant logiciel (552, 552a, 552b, 552c) émulant l'accès à des services ou applications PTT à bande étroite,  a first software component (552, 552a, 552b, 552c) emulating access to narrowband PTT services or applications,
- un deuxième composant logiciel (553, 553a, 553b, 553c) émulant l'accès à des services ou applications PTT à large bande.  a second software component (553, 553a, 553b, 553c) emulating access to broadband PTT services or applications.
EP12783098.2A 2011-10-12 2012-08-24 Digital radio-communication system for changing a narrow-band infrastructure and terminals into a wide-band infrastructure and terminals Withdrawn EP2767107A2 (en)

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