WO2006008241A1 - Connection of a radiocommunications terminal to at least one of two networks - Google Patents
Connection of a radiocommunications terminal to at least one of two networks Download PDFInfo
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- WO2006008241A1 WO2006008241A1 PCT/EP2005/053236 EP2005053236W WO2006008241A1 WO 2006008241 A1 WO2006008241 A1 WO 2006008241A1 EP 2005053236 W EP2005053236 W EP 2005053236W WO 2006008241 A1 WO2006008241 A1 WO 2006008241A1
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- Prior art keywords
- network
- channel
- terminal
- connection method
- networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
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- 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
Definitions
- the field of the invention is that of digital radiocommunications.
- the invention relates to access to different services, for example the Internet, digital video, voice transmission and / or multimedia data at the rate, ..., for a user equipped with a radiocommunication terminal, when the user is located in a coverage area 10 common to several different technology networks.
- Such networks are for example of type:
- UMTS Universal Mobile Telecommunications Service
- GSM Global System for Mobile
- DVB-H Digital Video 20 Broadcasting - Handhelds
- portable digital television system for example
- WLAN Wireless Local Area Network
- WWAN Wireless Wide Area Network
- the invention relates to the optimization of the connection to one of these networks, called the secondary network, distinct from a so-called main network, to which the terminal connects by default, in standby mode.
- the main network implemented can, for example, be of UMTS type.
- a user of a terminal located in a coverage area common to a UMTS-type main network, and at least one secondary network, can access a service of the secondary network by first connecting to the network. primary, then to the secondary network.
- paging group also called “paging” group, or “paging” 12 (of the English “Paging Group"), when it is located in a cell of the UMTS network.
- the terminals 11, 112, 113 of a group of users 12 are in standby mode, that is to say in a mode where they are not in connected mode, but present and available for a communication in the cell of the UMTS network.
- These terminals are in particular listening for signals transmitted by a base station belonging to this cell. These signals are emitted on:
- BCH Broadcast CHannel
- PCH mobile search channel
- common transport channels corresponding to the physical layer of the communication protocol, in particular on CPICH channels (or “common pilot channel” of the English “Common Plot CHannel”).
- each user group 12 is associated with an indicator, called call indicator, carried by the physical channel PICH (of the English “Paging Indicator CHannel", for "call indicator channel”
- PICH of the English “Paging Indicator CHannel”
- This PICH channel periodically sends information to the PCH channel.
- FIG. 2 shows the structure of a radio frame on the PICH channel of the UMTS network.
- Such a PICH frame comprises 300 bits, and has a length of 10 ms. Of the 300 bits of a frame, 288 bits are used to carry the call indicators (also called "paging" indicators). The remaining 12 bits are not used and are not transmitted.
- call indicators are intended in particular for a group of users 12 to indicate that a message is intended for a user 11 of the group 12.
- this message (“Paging Typel”) is sent on the S-CCPCH (the "Secondary Common Control Physical Channel”) where the channel is located PCH to ask the user to establish a signaling connection with the main network, in a second step 22.
- the PCH channel carries a message including the user identifier (in English TMSI for "Temporary Mobile Station Identity”) and the cause of call (English “PagingCause”).
- the terminal 11 of the user concerned On receipt of this message, the terminal 11 of the user concerned starts the signaling connection establishment procedure, and switches from standby mode "idle" to a mode connected to the main network.
- the terminal checks the radio resources available on the main network (from the English RRC for "radio resource Control "), and allocate resources according to availability (allocation of the RAB, the English" Radio Access Bearer ").
- the terminal 11 while remaining in connected mode, is then redirected to another UMTS cell, during a cell reselection procedure, or to another network, during a transfer procedure 24, called "handover".
- handover a transfer procedure 24, called "handover"
- the terminal 11 is powered on.
- the MSC / VLR (mobile switching center / visitor location register) switch for "mobile service switch / visitor location recorder” then requests the broadcast of a "paging" message (including the identity temporary TMSI terminal), by the RNC (or “RNC radio network controller") in the various cells of the terminal location area 11.
- RNC radio network controller
- the identified terminal then establishes the RRC connection, the "Paging response" message is routed to the MSCAT - R.
- the terminal 11 is then authenticated and the required resources are allocated.
- connection technique presented allows a terminal to switch from a primary network to a secondary network providing a desired service.
- This technique implemented when the desired service is not supported by the main network, or when the main network does not have sufficient resources, has several disadvantages.
- a first disadvantage of this technique is that it requires the use of resources of the main network while the service requested by the user is not supported by the main network, but by a secondary network.
- a user requires a service, for example a digital video
- obtaining the video requires prior switching to connected mode with the main network, even if the Radio resources needed for this connection are not available in the main network, while they are available in the DVB network.
- an object of the invention is to provide a technique that allows a user to simply and efficiently access a secondary network, even when the main network resources are not available, and / or when a desired service by the user is not available on the main network.
- Another objective of the invention is to propose such a technique that simplifies and optimizes the mode changes from the standby mode to the connected mode, and vice versa, on the different networks.
- the invention also aims to provide such a technique does not require the addition of additional messages, for example relating to the requested service.
- an objective of the invention is to propose such a technique that makes it possible to optimize the allocation of radio resources, and does not require the allocation of additional resources for the allocation of the service.
- Yet another object of the invention is to implement such a technique simply, efficiently and inexpensively.
- a radiocommunication terminal to a communication network among at least two accessible communication networks, one of which first network, said main network, and at least one second network, said secondary network, the main network implementing at least one main communication channel and a signaling channel.
- the signaling channel carries service accessibility information in the secondary network (s).
- the terminal reads the service accessibility information, in a standby mode, and can connect directly to one of the secondary networks, without going into connected mode on said main network, if said accessibility information indicates that an audit connection secondary network is possible.
- accessibility information indicates that an audit connection secondary network is possible.
- the service accessibility information transmitted over the signaling channel makes it possible to indicate either that the service is available on the secondary network and that the resources necessary for the connection with the secondary network are available, or that the service is available. on the secondary network, without any information on the availability of resources.
- the invention is based on a completely new and inventive approach of connecting a terminal to a secondary communication network, not requiring to go into connected mode on the main network to then be able to switch to the secondary network. selected.
- the invention thus optimizes the allocation of radio resources, and allows a user to connect directly to a secondary network, even if the main network does not have available radio resources.
- a channel of the main communication network carries information concerning service accessibility, that is to say the existence of a service and / or the availability of the resources necessary for connection to different networks. (or services) that a user may wish to access. Based on this accessibility information, the terminal can therefore connect directly to the secondary network providing such a service, without going into connected mode on the main network.
- the main network implements two signaling channels: a paging channel comprising, among others, signaling notification data, in the form of messages belonging to a predetermined message list;
- a paging indicator channel returning to said paging channel, when signaling notification data is present for said terminal or for a group to which said terminal belongs, one of said messages indicating that service accessibility information is present for said terminal or for a group to which said terminal belongs.
- These two paging channels and paging indicators thus make it possible to identify a terminal present in a cell, belonging to a group of users, and to send it, to itself or to the group to which it belongs, a message concerning the information service accessibility, if the terminal (or the group to which it belongs) is affected by the message.
- this accessibility information is carried by the paging indicator channel.
- this paging indicator channel is organized into frames having, in each of the frames, a first portion carrying paging indicators and a second portion carrying the service accessibility information.
- the pagination indicators also called call indicators, are notably associated with a group of users present in a cell of the main network.
- connection method according to the invention is particularly remarkable in that it implements, in said terminal, the following steps:
- the terminal located in the common coverage area of the different networks in standby mode, stores the second part of the frame, including in particular the accessibility information, if one of the indicators of the indicator channel of pagination is the group of users to which the terminal belongs.
- the terminal will read the paging channel to see if a message is addressed to it. If this is the case, he can decode the message.
- the terminal can then switch to the secondary network, using the service accessibility information that the terminal has read on the paging indicator channel, and then stored .
- the terminal can thus go directly from the standby mode to the connected mode on the secondary network, presenting available resources, without going into connected mode on the main network.
- each of the frames of the paging indicators comprises 300 bits channel, of which 12 for the second portion.
- at least 3 of the 12 bits of the second part can be used to indicate the network type It is thus possible to "code" a GSM network with bits OO1 ', a UMTS network with bits'100', a DVB-H network with bits' 011 '...
- the remaining bits of the second part may in particular be used to define a carrier frequency of the secondary network, an identity of a communication cell of the secondary network, a type of service available on the secondary network or an available bandwidth information.
- the main network is a UMTS type network
- the paging channel is the PCH channel
- the paging indicator channel is the PICH channel.
- the second part of each frame of the paging indicator channel corresponds to the unused 12 bits of the PICH channel in the UMTS standard.
- the message indicating the presence of accessibility information corresponds to the "spare" part of the "PagingCause” message carried by said PCH channel.
- Secondary networks belong in particular to the group comprising networks of the type:
- WLAN wireless local area network
- WWAN wireless wide area network
- the invention also relates to a radiocommunication terminal implementing the connection method described above.
- the terminal comprises means for analyzing the accessibility information in standby mode in said main network, and connection means connected to one of said secondary networks, from said standby mode.
- the invention also relates to a radiocommunication system in a main network implementing said connection method described above.
- the system implements a step of insertion of the accessibility data in said signaling channel.
- FIGS. 1A, 1B, 1C and 2 already presented in relation to the prior art, show a connection technique to a secondary network such that specified in the UMTS standard;
- Figure 3 illustrates a common coverage area in a multiple network system;
- FIG. 4 presents a technique of connection to a secondary network according to the invention;
- FIG. 5 illustrates the structure of a radio frame on a PICH channel according to the invention for the exchanges between a terminal located in the common coverage area of FIG. 3 and a main network. 7.
- the general principle of the invention is based on a technique enabling a terminal to switch from a main network to a secondary network, the user being located in a coverage area common to these two networks, when the radio resources of the main network are not available, and / or when a service desired by the user is not available on the main network but available on a secondary network, by going directly to the secondary network.
- the invention proposes to analyze a paging indicator channel between the terminal and the main network, this channel including service accessibility information relating to the existence of a service and / or the availability of the resources needed for the connection.
- This information thus makes it possible to identify the secondary network to which the user must connect in order to benefit from the requested service, without having to switch to connected mode with the main network.
- the invention applies especially in the case where the user (or his terminal) 11:
- - is in the common multi-network coverage area; is implemented on a main network; and when the desired application (or service) can not be offered by the backbone.
- These networks are for example of the DVB, UMTS, WLAN / WWAN or GSM / GPRS / EDGE type.
- the terminal 11 is then registered in a group of users of the main network. Such a user group is already described, in connection with Figures IA, IB and IC.
- this terminal 11 is listening for signals transmitted by a base station of the main network, and in particular listening to a paging channel and a paging indicator channel.
- This paging indicator channel includes paging indicators and accessibility information, and can be organized into successive frames.
- This service accessibility information specifies in particular the radio resource available on the different secondary networks.
- the terminal 11 listening to the signals transmitted by the base station in standby mode, can thus read accessibility information of the secondary networks present on the paging indicator channel.
- the terminal meniôris accessibility information carried by the paging indicator channel When the paging indicators relate to the user group to which the terminal 11 belongs, the terminal meniôris accessibility information carried by the paging indicator channel.
- the paging channel carries a message comprising the identifier of a user and the cause of his request for service.
- the latter decodes the message, while remaining in standby mode.
- the terminal 11 switches from the main network to the secondary network offering the requested service.
- a terminal 11 can directly connect to a secondary network without going through the mode connected with the main network, in order to access a service offered by the secondary network.
- the main network is considered to be of UMTS type, and the paging indicator channel used between the terminal and the main network corresponds to the PICH channel.
- each of the PICH frames comprises 300 bits, of which 288 are used to carry the call indicators and the remaining 12 bits are not used and are not transmitted.
- 288 bits per frame are used to carry call indicators associated with a group of users.
- the remaining 12 bits which were not used according to the techniques relating to the UMTS of the prior art, are used here, so as to prevent the user's terminal from going from sleep mode to connected mode with the network. main to change network.
- this bit is inserted information relating to the type of network on which the terminal can switch.
- these 12 bits comprise accessibility information, relating to the type of available network, according to the desired service. For example, it is possible to use at least 3 bits of the remaining 12 bits of a PICH frame to indicate the type of network, by "encoding" the type of network:
- a GSM network would be encoded by bits '001';
- this set of codes is a simple example, and that other codes, as well as a different number of bits, can be used to indicate the type of network, depending on the desired application.
- the other remaining bits can for example be used to indicate the carrier frequency (via the radio frequency channel number ARFCN, the Absolute Radio Frequency Channel Number), and / or the identity of the cell (CeIl ID ), and / or the type of service, or any other information.
- the remaining 12 bits of at least one of the frames transported by the PICH channel are then transmitted on this PICH channel, with the 288 bits of call indicators.
- the method of switching a main network to a secondary network according to the invention does not require going into connected mode with the main network.
- the terminal 11 listens to the PICH channel during a first step, in standby mode. If the user group to which it belongs is concerned by a message, the terminal stores the last 12 bits of the frames conveyed by the PICH channel, and reads the PCH channel to know to whom the message is addressed.
- PCH Packet Control Channel
- the terminal can decode the message, of the "PagingCause" type and coded on 3 bits according to the UMTS standard, corresponding to the request of the user, and conventionally transported by the PCH channel.
- the user terminal switches to this new network (secondary network) using the accessibility information stored on the last 12 bits of the PICH channel.
- the proposed technique makes it possible to overcome the transition in connected mode to switch to another network, and therefore the establishment of a signaling connection, in a simple and effective manner.
- the ability to stay in sleep mode also helps to avoid an exchange too messages, or adding new messages, while optimizing radio resources.
- the technique implemented thus makes it possible to ensure interoperability and quality of service, and to optimize the allocation of radio resources, depending on the application requested, when several networks of different technology (UMTS, GSM / GPRS / EDGE, WLAN, WWAN, DVB-H ...) are superimposed.
- the invention is of course not limited to a UMTS type main network, and can be applied to any type of radio network. However, if the main network used is of UMTS type, the invention has the advantage of keeping the existing UMTS protocol interface.
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Abstract
Description
CONNEXION D ' UN TERMINAL DE RADIOCOMMUNICATION A UN RESEAU PARMI AU MOINS DEUX RESEAUXCONNECTING A RADIO COMMUNICATION TERMINAL TO A NETWORK AMONG AT LEAST TWO NETWORKS
1. Domaine de l'invention1. Field of the invention
5 Le domaine de l'invention est celui des radiocommunications numériques.The field of the invention is that of digital radiocommunications.
Plus précisément, l'invention concerne l'accès à différents services, par exemple à Internet, à la vidéo numérique, à la transmission de la voix et/ou de données multimédia au débit, ..., pour un utilisateur équipé d'un terminal de radiocommunication, lorsque l'utilisateur est situé dans une zone de couverture 10 commune à plusieurs réseaux de technologies différentes. De tels réseaux sont par exemple de type :More specifically, the invention relates to access to different services, for example the Internet, digital video, voice transmission and / or multimedia data at the rate, ..., for a user equipped with a radiocommunication terminal, when the user is located in a coverage area 10 common to several different technology networks. Such networks are for example of type:
- télécommunications numériques, par exemple UMTS (« Universal Mobile Télécommunications Service » pour « système universel de télécommunications mobiles »), GSM (« Global System for Mobile- digital telecommunications, eg UMTS ("Universal Mobile Telecommunications Service" for "universal mobile telecommunications system"), GSM ("Global System for Mobile
15 communications » pour « système global de communications mobiles »), GPRS (« General Packet Radio Service » pour « système général de radiocommunication par paquets ») ou EDGE (« Enhanced Data for GSM Evolution », pour GSM évolué) ;15 communications "for" Global System for Mobile Communications "), GPRS (" General Packet Radio Service "for" General Packet Radio System ") or EDGE (" Enhanced Data for GSM Evolution "for Advanced GSM);
- télévision ou radio numérique, par exemple DVB-H (« Digital Video 20 Broadcasting - Handhelds » pour « système de télévision numérique portable ») ;- television or digital radio, for example DVB-H ("Digital Video 20 Broadcasting - Handhelds" for "portable digital television system");
- réseaux informatiques sans fil, par exemple WLAN (« Wireless Local Area Network » pour « réseau local sans fil »), ou WWAN (« Wireless Wide Area Network » pour « réseau sans fil étendu »).- wireless computer networks, such as Wireless Local Area Network (WLAN) or Wireless Wide Area Network (WWAN).
25 Plus précisément encore, l'invention concerne l'optimisation de la connexion à l'un de ces réseaux, dit réseau secondaire, distinct d'un réseau dit principal, auquel se connecte par défaut le terminal, en mode veille.More precisely, the invention relates to the optimization of the connection to one of these networks, called the secondary network, distinct from a so-called main network, to which the terminal connects by default, in standby mode.
Le réseau principal mis en œuvre peut, par exemple, être de type UMTS.The main network implemented can, for example, be of UMTS type.
2. Solutions de l'art antérieur Une technique permettant à un terminal de communication de se connecter à un deuxième réseau est déjà connue et spécifiée dans la norme UMTS.2. Solutions of the prior art A technique enabling a communication terminal to connect to a second network is already known and specified in the UMTS standard.
Selon cette technique, un utilisateur d'un terminal, situé dans une zone de couverture commune à un réseau principal de type UMTS, et à au moins un réseau secondaire, peut accéder à un service du réseau secondaire en se connectant d'abord au réseau principal, puis au réseau secondaire.According to this technique, a user of a terminal, located in a coverage area common to a UMTS-type main network, and at least one secondary network, can access a service of the secondary network by first connecting to the network. primary, then to the secondary network.
Cette technique de connexion est notamment présentée en relation avec les figures IA, IB et IC.This connection technique is particularly presented in connection with Figures IA, IB and IC.
Au cours d'une première étape 21, un terminal 11 situé dans une zone de couverture commune au réseau UMTS et à un autre réseau, par exemple le réseau GSM, est en mode veille, encore appelé mode « idle ».During a first step 21, a terminal 11 located in a coverage area common to the UMTS network and to another network, for example the GSM network, is in standby mode, also called "idle" mode.
Il est alors enregistré dans un groupe d'utilisateurs, encore appelé groupe de « pagination », ou de « paging » 12 (de l'anglais « Paging Group »), lorsqu'il est localisé dans une cellule du réseau UMTS. On note que, hors communication, les terminaux 11, 112, 113 d'un groupe d'utilisateurs 12 sont en mode veille, c'est-à-dire dans un mode où ils ne sont pas en mode connecté, mais présents et disponibles pour une communication dans la cellule du réseau UMTS. Ces terminaux sont notamment à l'écoute de signaux émis par une station de base appartenant à cette cellule. Ces signaux sont émis sur :It is then registered in a group of users, also called "paging" group, or "paging" 12 (of the English "Paging Group"), when it is located in a cell of the UMTS network. Note that, without communication, the terminals 11, 112, 113 of a group of users 12 are in standby mode, that is to say in a mode where they are not in connected mode, but present and available for a communication in the cell of the UMTS network. These terminals are in particular listening for signals transmitted by a base station belonging to this cell. These signals are emitted on:
- des canaux de transport communs correspondant aux services offerts vers les couches hautes du protocole de communication, notamment sur des canaux BCH ( ou « canal de diffusion » de l'anglais « Broadcast CHannel ») et PCH (ou « canal de recherche de mobile » de l'anglais « Paging CHannel ») ; etcommon transport channels corresponding to the services offered to the upper layers of the communication protocol, in particular on BCH (or Broadcast CHannel) and PCH (or mobile search channel) channels; "Paging CHannel"); and
- des canaux de transport communs correspondants à la couche physique du protocole de communication, notamment sur des canaux CPICH (ou « canal pilote commun » de l'anglais « Common Pllot CHannel »).common transport channels corresponding to the physical layer of the communication protocol, in particular on CPICH channels (or "common pilot channel" of the English "Common Plot CHannel").
Ces canaux, utilisés par les réseaux 3GPP, sont bien connus de l'Homme du Métier des réseaux mobiles et sont notamment spécifiés dans la norme « 3rd Génération Partnership Project ; Technical Spécification Group Radio Access Network ; Physical Channels and mapping of transport channels onto physical channels (FDD) release 1999 » de référence 3GPP TS25.211. Ces canaux ne sont donc pas décrits plus amplement. Au cours de cette première étape 21, chaque groupe d'utilisateurs 12 est associé à un indicateur, dit indicateur d'appel, transporté par le canal physique PICH (de l'anglais « Paging Indicator CHannel », pour « canal indicateur d'appel »), ce canal PICH envoyant périodiquement des informations au canal PCH. On présente en relation avec la figure 2 la structure d'une trame radio sur le canal PICH du réseau UMTS.These channels, used by 3GPP networks, are well known to those skilled in the field of mobile networks and are in particular specified in the "3 rd " standard. Generation Partnership Project; Technical Specification Group Radio Access Network; Physical Channels and Mapping of Transporters on Physical Channels (FDD) release 1999 "reference 3GPP TS25.211. These channels are therefore not described further. During this first step 21, each user group 12 is associated with an indicator, called call indicator, carried by the physical channel PICH (of the English "Paging Indicator CHannel", for "call indicator channel This PICH channel periodically sends information to the PCH channel. FIG. 2 shows the structure of a radio frame on the PICH channel of the UMTS network.
Une telle trame PICH comprend 300 bits, et présente une longueur de 10 ms. Sur les 300 bits d'une trame, 288 bits sont utilisés pour transporter les indicateurs d'appel (encore appelés indicateurs de « paging »). Les 12 bits restants ne sont pas utilisés et ne sont donc pas transmis.Such a PICH frame comprises 300 bits, and has a length of 10 ms. Of the 300 bits of a frame, 288 bits are used to carry the call indicators (also called "paging" indicators). The remaining 12 bits are not used and are not transmitted.
Ces indicateurs d'appel s'adressent notamment à un groupe d'utilisateurs 12 pour indiquer qu'un message est destiné à un utilisateur 11 du groupe 12.These call indicators are intended in particular for a group of users 12 to indicate that a message is intended for a user 11 of the group 12.
Comme illustré en figure IA;* IB et IC, alors que le terminal 11 est toujours en mode veille, ce message (« Paging Typel ») est envoyé sur le canal S- CCPCH (de l'anglais « Secondary Common Control Physical CHannel ») où se trouve le canal PCH pour demander à l'utilisateur d'établir une connexion de signalisation avec le réseau principal, au cours d'une deuxième étape 22.As illustrated in FIG. * IB and IC, while the terminal 11 is still in standby mode, this message ("Paging Typel") is sent on the S-CCPCH (the "Secondary Common Control Physical Channel") where the channel is located PCH to ask the user to establish a signaling connection with the main network, in a second step 22.
On rappelle que le canal PCH transporte un message comprenant l'identificateur de l'utilisateur (en anglais TMSI pour « Temporary Mobile Station Identity ») ainsi que la cause d'appel (de l'anglais « PagingCause »).It is recalled that the PCH channel carries a message including the user identifier (in English TMSI for "Temporary Mobile Station Identity") and the cause of call (English "PagingCause").
A la réception de ce message, le terminal 11 de l'utilisateur concerné commence la procédure d'établissement de connexion de signalisation, et passe du mode veille « idle » à un mode connecté sur le réseau principal.On receipt of this message, the terminal 11 of the user concerned starts the signaling connection establishment procedure, and switches from standby mode "idle" to a mode connected to the main network.
Au cours d'une troisième étape 23, le terminal vérifie les ressources radio disponibles sur le réseau principal (de l'anglais RRC pour « Radio ressource Control »), et alloue les ressources en fonction des disponibilités (allocation du RAB, de l'anglais « Radio Access Bearer »).During a third step 23, the terminal checks the radio resources available on the main network (from the English RRC for "radio resource Control "), and allocate resources according to availability (allocation of the RAB, the English" Radio Access Bearer ").
Si l'allocation des ressources radio échoue, c'est-à-dire si le réseau principal UMTS ne bénéficie pas de ressources suffisantes, on considère que le service demandé ne peut pas être offert, et la connexion est rejetée.If the allocation of radio resources fails, ie if the UMTS main network does not have sufficient resources, it is considered that the requested service can not be offered, and the connection is rejected.
Le terminal 11, tout en restant en mode connecté, est alors redirigé vers une autre cellule UMTS, au cours d'une procédure de re-sélection de cellule, ou bien vers un autre réseau, au cours d'une procédure de transfert 24, dite de « handover ». Ainsi, selon cette technique de l'art antérieur, on passe d'un mode veille à un mode connecté avant de vérifier la disponibilité des ressources.The terminal 11, while remaining in connected mode, is then redirected to another UMTS cell, during a cell reselection procedure, or to another network, during a transfer procedure 24, called "handover". Thus, according to this technique of the prior art, we go from a sleep mode to a connected mode before checking the availability of resources.
Pour le protocole d'échanges présenté en figure IC, le terminal 11 est sous tension.For the exchange protocol presented in FIG. 1C, the terminal 11 is powered on.
On considère qu'il a auparavant effectué une procédure d'inscription, et qu'il se trouve dans une zone de localisation du réseau Mobile Terrestre Public Nominal (HPLMN, de l'anglais « Home Public Land Mobile Network).It is considered that it has previously performed a registration procedure, and that it is in a location area of the Mobile Public Land Nominal Network (HPLMN) of the "Home Public Land Mobile Network".
Le commutateur MSC/VLR (de l'anglais « mobile switching center/visitor location register » pour « commutateur du service mobile/enregistreur de localisation des visiteurs ») demande ensuite la diffusion d'un message de « paging » (comportant l'identité temporaire du terminal TMSI), par le ou les RNC (de l'anglais « radio network controller » pour « contrôleur de réseau radio ») dans les différentes cellules de la zone de localisation du terminal 11.The MSC / VLR (mobile switching center / visitor location register) switch for "mobile service switch / visitor location recorder" then requests the broadcast of a "paging" message (including the identity temporary TMSI terminal), by the RNC (or "RNC radio network controller") in the various cells of the terminal location area 11.
Le terminal identifié établi alors la connexion RRC, le message « Paging response » est routé vers le MSCAT--R. Le terminal 11 est alors authentifié et les ressources requises sont allouées.The identified terminal then establishes the RRC connection, the "Paging response" message is routed to the MSCAT - R. The terminal 11 is then authenticated and the required resources are allocated.
3. Inconvénients de l'art antérieur3. Disadvantages of prior art
La technique de connexion présentée permet à un terminal de basculer d'un réseau principal vers un réseau secondaire offrant un service souhaité. Cette technique, mise en œuvre lorsque le service souhaité n'est pas supporté par le réseau principal, ou lorsque le réseau principal ne dispose pas de ressources suffisantes, présente plusieurs inconvénients.The connection technique presented allows a terminal to switch from a primary network to a secondary network providing a desired service. This technique, implemented when the desired service is not supported by the main network, or when the main network does not have sufficient resources, has several disadvantages.
Un premier inconvénient de cette technique est qu'elle nécessite d'utiliser des ressources du réseau principal alors que le service demandé par l'utilisateur n'est pas supporté par le réseau principal, mais par un réseau secondaire.A first disadvantage of this technique is that it requires the use of resources of the main network while the service requested by the user is not supported by the main network, but by a secondary network.
Ainsi, si un utilisateur requiert un service, par exemple une vidéo numérique, transitant par le réseau DVB et non pas par le réseau principal UMTS, l'obtention de la vidéo nécessite de passer préalablement en mode connecté avec le réseau principal, même si les ressources radio nécessaires à cette connexion ne sont pas disponibles dans le réseau principal, alors qu'elles sont disponibles dans le réseau DVB.Thus, if a user requires a service, for example a digital video, passing through the DVB network and not by the UMTS main network, obtaining the video requires prior switching to connected mode with the main network, even if the Radio resources needed for this connection are not available in the main network, while they are available in the DVB network.
On a donc un risque de refus du service, alors que les ressources sont disponibles. Un autre inconvénient majeur de cette technique de l'art antérieur est que, dans le cas où le service ou les ressources ne sont pas disponibles sur le réseau UMTS, elle nécessite un nombre élevé d'opérations :There is therefore a risk of refusal of service, while resources are available. Another major drawback of this technique of the prior art is that, in the case where the service or the resources are not available on the UMTS network, it requires a large number of operations:
- l'écoute du canal PICH ;- listening to the PICH channel;
- l'établissement d'une connexion de signalisation ; - le passage d'un mode veille à un mode connecté ;- the establishment of a signaling connection; - the transition from a standby mode to a connected mode;
- la vérification de la disponibilité des ressources ;- verification of the availability of resources;
- l'échange de messages pour sélectionner une nouvelle cellule, ou encore un nouveau réseau ;- the exchange of messages to select a new cell, or a new network;
- le basculement vers le réseau souhaité et/ou disponible. • Ainsi, cette technique de l'art antérieur nécessite de nombreux échanges, qui sont coûteux en temps, et en ressources.- switching to the desired and / or available network. Thus, this technique of the prior art requires many exchanges, which are costly in time and resources.
4. Objectifs de l'invention4. Objectives of the invention
L'invention a notamment pour objectif de pallier ces inconvénients de l'art antérieur. Plus précisément, un objectif de l'invention est de fournir une technique permettant à un utilisateur d'accéder simplement et efficacement à un réseau secondaire, même lorsque les ressources du réseau principal ne sont pas disponibles, et/ou lorsqu'un service souhaité par l'utilisateur n'est pas disponible sur le réseau principal.The invention particularly aims to overcome these disadvantages of the prior art. More specifically, an object of the invention is to provide a technique that allows a user to simply and efficiently access a secondary network, even when the main network resources are not available, and / or when a desired service by the user is not available on the main network.
Un autre objectif de l'invention est de proposer une telle technique simplifiant et optimisant les changements de modes du mode veille au mode connecté, et inversement, sur les différents réseaux.Another objective of the invention is to propose such a technique that simplifies and optimizes the mode changes from the standby mode to the connected mode, and vice versa, on the different networks.
L'invention a encore pour objectif de fournir une telle technique ne nécessitant pas l'ajout de messages supplémentaires, par exemple relatifs au service demandé.The invention also aims to provide such a technique does not require the addition of additional messages, for example relating to the requested service.
Notamment, un objectif de l'invention est de proposer une telle technique permettant d'optimiser l'allocation des ressources radio, et ne nécessitant pas l'allocation de ressources supplémentaires pour l'attribution du service. Encore un autre objectif de l'invention est de mettre en œuvre une telle technique de façon simple, efficace et peu coûteuse.In particular, an objective of the invention is to propose such a technique that makes it possible to optimize the allocation of radio resources, and does not require the allocation of additional resources for the allocation of the service. Yet another object of the invention is to implement such a technique simply, efficiently and inexpensively.
5. Caractéristiques essentielles de l'invention5. Essential characteristics of the invention
"' Ces objectifs, ainsi que d'autres qui apparaîtront par la suite, sont atteints à l'aide d'un procédé de connexion d'un terminal de radiocommunication à un réseau de communication parmi au moins deux réseaux de communication accessibles, dont un premier réseau, dit réseau principal, et au moins un second réseau, dit réseau secondaire, le réseau principal mettant en oeuvre au moins un canal principal de communication et un canal de signalisation.These objectives, as well as others which will become apparent later, are achieved by a method of connecting a radiocommunication terminal to a communication network among at least two accessible communication networks, one of which first network, said main network, and at least one second network, said secondary network, the main network implementing at least one main communication channel and a signaling channel.
Selon l'invention, le canal de signalisation porte des informations d'accessibilité de service dans le(s) réseau(x) secondaire(s). Le terminal lit les informations d'accessibilité de service, dans un mode de veille, et peut se connecter directement à un des réseaux secondaires, sans passer en mode connecté sur ledit réseau principal, si lesdites informations d'accessibilité indiquent qu'une connexion audit réseau secondaire est possible. On entend ici, et dans la suite du document, par accessibilité au service l'existence du service et/ou la disponibilité des ressources nécessaires à la connexion.According to the invention, the signaling channel carries service accessibility information in the secondary network (s). The terminal reads the service accessibility information, in a standby mode, and can connect directly to one of the secondary networks, without going into connected mode on said main network, if said accessibility information indicates that an audit connection secondary network is possible. Here, and in the remainder of the document, is meant by accessibility to the service the existence of the service and / or the availability of the resources necessary for the connection.
Ainsi, les informations d'accessibilité de service transmises sur le canal de signalisation permettent d'indiquer soit que le service est disponible sur le réseau secondaire et que les ressources nécessaires pour la connexion avec le réseau secondaire sont disponibles, soit que le service est disponible sur le réseau secondaire, sans aucune précision sur la disponibilité des ressources.Thus, the service accessibility information transmitted over the signaling channel makes it possible to indicate either that the service is available on the secondary network and that the resources necessary for the connection with the secondary network are available, or that the service is available. on the secondary network, without any information on the availability of resources.
Ainsi, l'invention repose sur une approche tout à fait nouvelle et inventive de connexion d'un terminal à un réseau secondaire de communication, ne nécessitant pas de passer en mode connecté sur le réseau principal pour pouvoir, ensuite, basculer sur le réseau secondaire choisi.Thus, the invention is based on a completely new and inventive approach of connecting a terminal to a secondary communication network, not requiring to go into connected mode on the main network to then be able to switch to the secondary network. selected.
L'invention permet ainsi d'optimiser l'allocation des ressources radio, et permet à un utilisateur de se connecter directement à un réseau secondaire, même si le réseau principal ne dispose pas de ressources radio disponibles.The invention thus optimizes the allocation of radio resources, and allows a user to connect directly to a secondary network, even if the main network does not have available radio resources.
Selon l'invention, un canal du réseau principal de communication porte des informations concernant l'accessibilité de service, c'est-à-dire l'existence d'un service et/ou la disponibilité des ressources nécessaire à la connexion à différents réseaux (ou services) auxquels un utilisateur peut souhaiter accéder. En fonction de ces informations d'accessibilité, le terminal peut donc se connecter directement au réseau secondaire fournissant un tel service, sans passer en mode connecté sur le réseau principal.According to the invention, a channel of the main communication network carries information concerning service accessibility, that is to say the existence of a service and / or the availability of the resources necessary for connection to different networks. (or services) that a user may wish to access. Based on this accessibility information, the terminal can therefore connect directly to the secondary network providing such a service, without going into connected mode on the main network.
Avantageusement, le réseau principal met en œuvre deux canaux de signalisation : - un canal de pagination comprenant, entre autres, des données de notification de signalisation, sous la forme de messages appartenant à une liste de messages prédéterminée ;Advantageously, the main network implements two signaling channels: a paging channel comprising, among others, signaling notification data, in the form of messages belonging to a predetermined message list;
- un canal d'indicateurs de pagination, renvoyant vers ledit canal de pagination, lorsque des données de notification de signalisation sont présentes pour ledit terminal ou pour un groupe auquel appartient ledit terminal, un desdits messages indiquant que des informations d'accessibilité de service sont présentes pour ledit terminal ou pour un groupe auquel appartient ledit terminal. Un tel canal de pagination permet ainsi la diffusion d'informations de contrôle à un terminal dont le réseau ne connaît pas la localisation, en diffusant les informations dans plusieurs cellules.a paging indicator channel, returning to said paging channel, when signaling notification data is present for said terminal or for a group to which said terminal belongs, one of said messages indicating that service accessibility information is present for said terminal or for a group to which said terminal belongs. Such a paging channel thus makes it possible to broadcast control information to a terminal whose network does not know the location, by broadcasting the information in several cells.
Ces deux canaux de pagination et d'indicateurs de pagination permettent ainsi d'identifier un terminal présent dans une cellule, appartenant à un groupe d'utilisateurs, et de lui adresser, à lui ou au groupe auquel il appartient, un message concernant les informations d'accessibilité de service, si le terminal (ou le groupe auquel il appartient) est concerné par le message.These two paging channels and paging indicators thus make it possible to identify a terminal present in a cell, belonging to a group of users, and to send it, to itself or to the group to which it belongs, a message concerning the information service accessibility, if the terminal (or the group to which it belongs) is affected by the message.
De manière préférentielle, ces informations d'accessibilité sont transportées par le canal d'indicateurs de pagination. Avantageusement, ce canal d'indicateurs de pagination est organisé en trames présentant, dans chacune des trames, une première partie portant des indicateurs de pagination et une seconde partie portant les informations d'accessibilité de service. ' Preferably, this accessibility information is carried by the paging indicator channel. Advantageously, this paging indicator channel is organized into frames having, in each of the frames, a first portion carrying paging indicators and a second portion carrying the service accessibility information. '
Les indicateurs de pagination, encore appelés indicateurs d'appel, sont notamment associés à un groupe d'utilisateurs présents dans une cellule du réseau principal.The pagination indicators, also called call indicators, are notably associated with a group of users present in a cell of the main network.
Le procédé de connexion selon l'invention est notamment remarquable en ce qu'il met en œuvre, dans ledit terminal, les étapes suivantes :The connection method according to the invention is particularly remarkable in that it implements, in said terminal, the following steps:
- lecture d'un indicateur destiné audit terminal, ou au groupe auquel il appartient, dans une desdites trames dudit canal d'indicateurs de pagination ;reading an indicator intended for said terminal, or the group to which it belongs, in one of said frames of said paging indicator channel;
- mémorisation de ladite seconde partie de ladite trame ;storing said second portion of said frame;
- lecture d'un message dans ledit canal de pagination, en fonction dudit indicateur ; - si ledit message est un message indiquant que des informations d'accessibilité sont présentes, lecture de celles-ci dans la seconde partie mémorisée.reading a message in said paging channel, according to said indicator; - If said message is a message indicating that accessibility information is present, reading thereof in the second stored portion.
Ainsi, selon l'invention, le terminal situé dans la zone de couverture commune des différents réseaux, en mode veille, mémorise la seconde partie de la trame, comprenant notamment les informations d'accessibilité, si un des indicateurs du canal d'indicateurs de pagination désigne le groupe d'utilisateurs auquel le terminal appartient.Thus, according to the invention, the terminal located in the common coverage area of the different networks, in standby mode, stores the second part of the frame, including in particular the accessibility information, if one of the indicators of the indicator channel of pagination is the group of users to which the terminal belongs.
Ensuite, le terminal va lire le canal de pagination pour savoir si un message lui est adressé. Si cela est le cas, il peut décoder le message.Then, the terminal will read the paging channel to see if a message is addressed to it. If this is the case, he can decode the message.
Si le message précise que des informations d'accessibilité sont présentes, le terminal peut alors basculer vers le réseau secondaire, à l'aide des informations d'accessibilité de service que le terminal a lues sur le canal d'indicateurs de pagination, puis mémorisées. Le terminal peut ainsi passer directement du mode veille au mode connecté sur le réseau secondaire, présentant des ressources disponibles, sans passer en mode connecté sur le réseau principal.If the message specifies that accessibility information is present, the terminal can then switch to the secondary network, using the service accessibility information that the terminal has read on the paging indicator channel, and then stored . The terminal can thus go directly from the standby mode to the connected mode on the secondary network, presenting available resources, without going into connected mode on the main network.
Selon "un mode de réalisation préférentiel, chacune des trames du canal d'indicateurs de pagination comprend 300 bits, dont 12 pour la seconde partie. Ainsi, au moins 3 des 12 bits de la seconde partie peuvent être utilisés pour indiquer le type de réseau secondaire. On peut ainsi « coder » un réseau GSM avec les bits OOl', un réseau UMTS avec les bits '100', un réseau DVB-H avec les bits '011'...According to "a preferred embodiment, each of the frames of the paging indicators comprises 300 bits channel, of which 12 for the second portion. Thus, at least 3 of the 12 bits of the second part can be used to indicate the network type It is thus possible to "code" a GSM network with bits OO1 ', a UMTS network with bits'100', a DVB-H network with bits' 011 '...
Les bits restants de la seconde partie peuvent notamment servir à définir une fréquence porteuse du réseau secondaire, une identité d'une cellule de communication du réseau secondaire, un type de service disponible sur le réseau secondaire ou encore une information de bande passante disponible.The remaining bits of the second part may in particular be used to define a carrier frequency of the secondary network, an identity of a communication cell of the secondary network, a type of service available on the secondary network or an available bandwidth information.
Selon ce mode de réalisation préférentiel, le réseau principal est un réseau de type UMTS, le canal de pagination est le canal PCH et le canal d'indicateurs de pagination est le canal PICH. Ainsi, la seconde partie de chacune des trames du canal d'indicateurs de pagination correspond aux 12 bits inutilisés du canal PICH dans la norme UMTS.According to this preferred embodiment, the main network is a UMTS type network, the paging channel is the PCH channel and the paging indicator channel is the PICH channel. Thus, the second part of each frame of the paging indicator channel corresponds to the unused 12 bits of the PICH channel in the UMTS standard.
Selon ce mode de réalisation, le message indiquant la présence des informations d'accessibilité correspond à la partie « spare » du message « PagingCause » transporté par ledit canal PCH.According to this embodiment, the message indicating the presence of accessibility information corresponds to the "spare" part of the "PagingCause" message carried by said PCH channel.
Ces différents termes « spare » et « PagingCause » sont définis dans la norme UMTS et sont bien connus de l'Homme du Métier, us ne sont pas définis plus amplement ici.These different terms "spare" and "PagingCause" are defined in the UMTS standard and are well known to those skilled in the art, they are not defined further here.
Les réseaux secondaires appartiennent notamment au groupe comprenant des réseaux de type :Secondary networks belong in particular to the group comprising networks of the type:
- réseaux informatiques sans fil (WLAN, WWAN, ...) ;- wireless computer networks (WLAN, WWAN, ...);
- télévision ou radio numérique (DVB-H, ...) ;- television or digital radio (DVB-H, ...);
- télécommunication numérique (GSM, GPRS, EDGE, ...). L'invention concerne également un terminal de radiocommunication mettant en œuvre le procédé de connexion décrit ci-dessus.- digital telecommunication (GSM, GPRS, EDGE, ...). The invention also relates to a radiocommunication terminal implementing the connection method described above.
Selon l'invention, le terminal comprend des moyens d'analyse des informations d'accessibilité en mode veille dans ledit réseau principal, et des moyens de passage en mode connecté sur un desdits réseaux secondaires, à partir dudit mode veille. L'invention concerne encore un système de radiocommunication dans un réseau principal mettant en œuvre ledit procédé de connexion décrit ci-dessus.According to the invention, the terminal comprises means for analyzing the accessibility information in standby mode in said main network, and connection means connected to one of said secondary networks, from said standby mode. The invention also relates to a radiocommunication system in a main network implementing said connection method described above.
Selon l'invention, le système met en œuvre une étape d'insertion des données d'accessibilité dans ledit canal de signalisation.According to the invention, the system implements a step of insertion of the accessibility data in said signaling channel.
6. Liste des figures D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante d'un mode de réalisation préférentiel, donné à titre de simple exemple illustratif et non limitatif, et des dessins annexés, parmi lesquels : les figures IA, IB, IC et 2, déjà présentées en relation avec l'art antérieur, présentent une technique de connexion à un réseau secondaire telle que spécifié dans la norme UMTS ; la figure 3 illustre une zone de couverture commune dans un système de réseaux multiples ; la figure 4 présente une technique de connexion à un réseau secondaire selon l'invention ; la figure 5 illustre la structure d'une trame radio sur un canal PICH selon l'invention pour les échanges entre un terminal situé dans la zone de couverture commune de la figure 3 et un réseau principal. 7. Description d'un mode de réalisation de l'invention Le principe général de l'invention repose sur une technique permettant à un terminal de basculer d'un réseau principal vers un réseau secondaire, l'utilisateur étant situé dans une zone de couverture commune à ces deux réseaux, lorsque les ressources radio du réseau principal ne sont pas disponibles, et/ou lorsqu'un service souhaité par l'utilisateur n'est pas disponible sur le réseau principal mais disponible sur un réseau secondaire, en passant directement sur le réseau secondaire.6. List of Figures Other features and advantages of the invention will appear more clearly on reading the following description of a preferred embodiment, given as a simple illustrative and nonlimiting example, and the accompanying drawings, among others. which: FIGS. 1A, 1B, 1C and 2, already presented in relation to the prior art, show a connection technique to a secondary network such that specified in the UMTS standard; Figure 3 illustrates a common coverage area in a multiple network system; FIG. 4 presents a technique of connection to a secondary network according to the invention; FIG. 5 illustrates the structure of a radio frame on a PICH channel according to the invention for the exchanges between a terminal located in the common coverage area of FIG. 3 and a main network. 7. DESCRIPTION OF AN EMBODIMENT OF THE INVENTION The general principle of the invention is based on a technique enabling a terminal to switch from a main network to a secondary network, the user being located in a coverage area common to these two networks, when the radio resources of the main network are not available, and / or when a service desired by the user is not available on the main network but available on a secondary network, by going directly to the secondary network.
Pour ce faire, l'invention propose d'analyser un canal d'indicateur de pagination entre le terminal et le réseau principal, ce canal portant notamment des informations d'accessibilité de service, relatives à l'existence d'un service et/ou à la disponibilité des ressources nécessaires à la connexion.To do this, the invention proposes to analyze a paging indicator channel between the terminal and the main network, this channel including service accessibility information relating to the existence of a service and / or the availability of the resources needed for the connection.
Ces informations permettent ainsi d'identifier le réseau secondaire auquel doit se connecter l'utilisateur pour bénéficier du service demandé, sans qu'il ait besoin de passer en mode connecté avec le réseau principal.This information thus makes it possible to identify the secondary network to which the user must connect in order to benefit from the requested service, without having to switch to connected mode with the main network.
Comme illustré en figure 3, l'invention s'applique notamment dans le cas où l'utilisateur (ou son terminal) 11 :As illustrated in FIG. 3, the invention applies especially in the case where the user (or his terminal) 11:
- se trouve dans la zone de couverture commune de réseaux multiples ; est mis en œuvre sur un réseau principal ; et lorsque l'application souhaitée (ou le service) ne peut pas être offerte par le réseau principal. Ces réseaux sont par exemple de type DVB, UMTS, WLAN/WWAN ou encore GSM/GPRS/EDGE.- is in the common multi-network coverage area; is implemented on a main network; and when the desired application (or service) can not be offered by the backbone. These networks are for example of the DVB, UMTS, WLAN / WWAN or GSM / GPRS / EDGE type.
Le terminal 11 est alors enregistré dans un groupe d'utilisateurs du réseau principal. Un tel groupe d'utilisateur est déjà décrit, en relation avec les figures IA, IB et IC.The terminal 11 is then registered in a group of users of the main network. Such a user group is already described, in connection with Figures IA, IB and IC.
Comme illustré en figure 4, ce terminal 11 est à l'écoute de signaux émis par une station de base du réseau principal, et notamment à l'écoute d'un canal de pagination et d'un canal d'indicateurs de pagination.As illustrated in FIG. 4, this terminal 11 is listening for signals transmitted by a base station of the main network, and in particular listening to a paging channel and a paging indicator channel.
Ce canal d'indicateurs de pagination comprend notamment des indicateurs de pagination et des informations d'accessibilité, et peut être organisé en trames successives.This paging indicator channel includes paging indicators and accessibility information, and can be organized into successive frames.
Ces informations d'accessibilité de service précisent notamment la ressource radio disponible sur les différents réseaux secondaires.This service accessibility information specifies in particular the radio resource available on the different secondary networks.
Le terminal 11, écoutant les signaux émis par la station de base en mode veille, peut ainsi lire des informations d'accessibilité des réseaux secondaires, présentes sur le canal d'indicateurs de pagination.The terminal 11, listening to the signals transmitted by the base station in standby mode, can thus read accessibility information of the secondary networks present on the paging indicator channel.
Lorsque les indicateurs de pagination concernent le groupe d'utilisateurs auquel appartient le terminal 11, le terminal méniôrise les informations d'accessibilité transportées par le canal d'indicateurs de pagination. Le canal de pagination transporte quant à lui un message comprenant l'identificateur d'un utilisateur et la cause de sa demande de service.When the paging indicators relate to the user group to which the terminal 11 belongs, the terminal meniôris accessibility information carried by the paging indicator channel. The paging channel carries a message comprising the identifier of a user and the cause of his request for service.
Lorsque le message transporté par le canal de pagination est adressé au terminal 11, ce dernier décode le message, tout en restant en mode veille.When the message carried by the paging channel is addressed to the terminal 11, the latter decodes the message, while remaining in standby mode.
Si ce message indique que des informations d'accessibilité sont présentes, le terminal 11 bascule du réseau principal vers le réseau secondaire lui offrant le service demandé.If this message indicates that accessibility information is present, the terminal 11 switches from the main network to the secondary network offering the requested service.
Ainsi, selon l'invention, un terminal 11 peut directement se connecter à un réseau secondaire sans passer par le mode connecté avec le réseau principal, afin d'accéder à un service offert par le réseau secondaire. Selon un mode de réalisation préférentiel, on considère que le réseau principal est de type UMTS, et que le canal d'indicateurs de pagination utilisé entre le terminal et le réseau principal correspond au canal PICH.Thus, according to the invention, a terminal 11 can directly connect to a secondary network without going through the mode connected with the main network, in order to access a service offered by the secondary network. According to a preferred embodiment, the main network is considered to be of UMTS type, and the paging indicator channel used between the terminal and the main network corresponds to the PICH channel.
On présente ainsi, en relation avec la figure 5, la nouvelle structure d'une telle trame radio sur le canal PICH.Thus, in relation with FIG. 5, the new structure of such a radio frame on the PICH channel is presented.
On rappelle que chacune des trames PICH comprend 300 bits, dont 288 sont utilisés pour transporter les indicateurs d'appel et les 12 bits restants ne sont pas utilisés et ne sont pas transmis.It is recalled that each of the PICH frames comprises 300 bits, of which 288 are used to carry the call indicators and the remaining 12 bits are not used and are not transmitted.
Comme décrit précédemment en relation avec l'art antérieur, 288 bits par trame sont utilisés pour transporter les indicateurs d'appel, associés à un groupe d'utilisateurs.As previously described in connection with the prior art, 288 bits per frame are used to carry call indicators associated with a group of users.
Les 12 bits restants, qui n'étaient pas utilisés selon les techniques relatives à l'UMTS de l'art antérieur, sont ici utilisés, de sorte à éviter que le terminal de l'utilisateur passe du mode veille au mode connecté avec le réseau principal pour changer de réseau. On insère ainsi dans ces bits des informations relatives au type de réseau sur lequel le terminal peut basculer.The remaining 12 bits, which were not used according to the techniques relating to the UMTS of the prior art, are used here, so as to prevent the user's terminal from going from sleep mode to connected mode with the network. main to change network. In this bit is inserted information relating to the type of network on which the terminal can switch.
Ainsi, selon l'invention, ces 12 bits comprennent des informations d'accessibilité, relatives au type de réseau disponible, en fonction du service souhaité. Par exemple, il est possible d'utiliser au moins 3 bits des 12 bits restants d'une trame PICH pour indiquer le type de réseau, en « codant » le type de réseau :Thus, according to the invention, these 12 bits comprise accessibility information, relating to the type of available network, according to the desired service. For example, it is possible to use at least 3 bits of the remaining 12 bits of a PICH frame to indicate the type of network, by "encoding" the type of network:
- un réseau GSM serait codé par les bits '001 ' ;a GSM network would be encoded by bits '001';
- un réseau UMTS par les bits ' 100' ; - un réseau DVB-H par les bits '011' ; etc.a UMTS network by bits '100'; a DVB-H network with bits '011'; etc.
Il est bien entendu que ce jeu de codes est un simple exemple, et que d'autres codes, ainsi qu'un nombre différents de bits, peuvent être utilisés pour indiquer le type de réseau, en fonction de l'application souhaitée. Les autres bits restants peuvent par exemple servir à indiquer la fréquence porteuse (par l'intermédiaire du numéro de canal radiofréquence ARFCN, de l'anglais « Absolute Radio Frequency Channel Number »), et/ou l'identité de la cellule (CeIl ID), et/ou le type de service, ou encore tout autre information. Selon l'invention, les 12 bits restants d'au moins une des trames transportée par le canal PICH sont alors transmis sur ce canal PICH, avec les 288 bits d'indicateurs d'appel.It is understood that this set of codes is a simple example, and that other codes, as well as a different number of bits, can be used to indicate the type of network, depending on the desired application. The other remaining bits can for example be used to indicate the carrier frequency (via the radio frequency channel number ARFCN, the Absolute Radio Frequency Channel Number), and / or the identity of the cell (CeIl ID ), and / or the type of service, or any other information. According to the invention, the remaining 12 bits of at least one of the frames transported by the PICH channel are then transmitted on this PICH channel, with the 288 bits of call indicators.
Ainsi, le procédé de commutation d'un réseau principal vers un réseau secondaire selon l'invention, ne nécessite pas de passer en mode connecté avec le réseau principal.Thus, the method of switching a main network to a secondary network according to the invention does not require going into connected mode with the main network.
Finalement, selon l'invention, le terminal 11 écoute le canal PICH au cours d'une première étape, en mode veille. Si le groupe d'utilisateurs auquel il appartient est concerné par un message, le terminal mémorise les 12 derniers bits des trames véhiculées par le canal PICH, et lit le canal PCH pour savoir à qui est adressé le message.Finally, according to the invention, the terminal 11 listens to the PICH channel during a first step, in standby mode. If the user group to which it belongs is concerned by a message, the terminal stores the last 12 bits of the frames conveyed by the PICH channel, and reads the PCH channel to know to whom the message is addressed.
En effet, le canal PCH (« Paging Channel ») permet la diffusion d'informations de contrôle à un terminal dont le réseau ne connaît pas la localisation, en diffusant les informations dans plusieurs cellules.Indeed, the PCH ("Paging Channel") channel makes it possible to broadcast control information to a terminal whose network does not know the location, by broadcasting the information in several cells.
Si le message lui est destiné, le terminal peut décoder le message, de type « PagingCause » et codé sur 3 bits selon la norme UMTS, correspondant à la demande de l'utilisateur, et classiquement transporté par le canal PCH.If the message is intended for him, the terminal can decode the message, of the "PagingCause" type and coded on 3 bits according to the UMTS standard, corresponding to the request of the user, and conventionally transported by the PCH channel.
Si le message « PagingCause » précise que des ressources sont disponibles pour accéder au service demandé par le terminal 11 sur un réseau secondaireIf the message "PagingCause" specifies that resources are available to access the service requested by the terminal 11 on a secondary network
(valeur « spare »), le terminal utilisateur bascule sur ce nouveau réseau (réseau secondaire) à l'aide des informations d'accessibilité mémorisées sur les 12 derniers bits du canal PICH.("spare" value), the user terminal switches to this new network (secondary network) using the accessibility information stored on the last 12 bits of the PICH channel.
Ainsi, selon l'invention, la technique proposée permet de s'affranchir du passage en mode connecté pour basculer vers un autre réseau, et donc de l'établissement d'une connexion de signalisation, de manière simple et efficace. La possibilité de rester en mode veille permet également d'éviter un échange trop important de messages, ou encore l'ajout de nouveaux messages, tout en optimisant les ressources radio.Thus, according to the invention, the proposed technique makes it possible to overcome the transition in connected mode to switch to another network, and therefore the establishment of a signaling connection, in a simple and effective manner. The ability to stay in sleep mode also helps to avoid an exchange too messages, or adding new messages, while optimizing radio resources.
La technique mise en œuvre permet ainsi d'assurer l'interopérabilité et la qualité de service, et d'optimiser l'allocation de ressource radio, en fonction de l'application demandée, lorsque plusieurs réseaux de technologie différente (UMTS, GSM/GPRS/EDGE, WLAN, WWAN, DVB-H...) se superposent.The technique implemented thus makes it possible to ensure interoperability and quality of service, and to optimize the allocation of radio resources, depending on the application requested, when several networks of different technology (UMTS, GSM / GPRS / EDGE, WLAN, WWAN, DVB-H ...) are superimposed.
L'invention n'est bien entendu pas limitée à un réseau principal de type UMTS, et peut s'appliquer à tout type de réseau de radiocommunications. Cependant, si le réseau principal utilisé est de type UMTS, l'invention présente l'avantage de conserver l'interface protocole UMTS existante. The invention is of course not limited to a UMTS type main network, and can be applied to any type of radio network. However, if the main network used is of UMTS type, the invention has the advantage of keeping the existing UMTS protocol interface.
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP05761094A EP1774819A1 (en) | 2004-07-15 | 2005-07-06 | Control of data processing using inter-frame motion and audio signal |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0407894A FR2873250B1 (en) | 2004-07-15 | 2004-07-15 | METHOD FOR CONNECTING A RADIO COMMUNICATION TERMINAL TO A NETWORK AMONG AT LEAST TWO ACCESSIBLE NETWORKS, TERMINAL AND CORRESPONDING BASE STATION |
| FR0407894 | 2004-07-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2006008241A1 true WO2006008241A1 (en) | 2006-01-26 |
Family
ID=34947007
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2005/053236 Ceased WO2006008241A1 (en) | 2004-07-15 | 2005-07-06 | Connection of a radiocommunications terminal to at least one of two networks |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1774819A1 (en) |
| FR (1) | FR2873250B1 (en) |
| WO (1) | WO2006008241A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020090975A1 (en) * | 2001-01-10 | 2002-07-11 | Keijo Laiho | Paging in a mobile telecommunication network |
| EP1318690A1 (en) * | 2001-12-05 | 2003-06-11 | Nokia Corporation | Call control method and arrangement |
| WO2004091246A1 (en) * | 2003-04-11 | 2004-10-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Multi-access call setup |
-
2004
- 2004-07-15 FR FR0407894A patent/FR2873250B1/en not_active Expired - Fee Related
-
2005
- 2005-07-06 EP EP05761094A patent/EP1774819A1/en not_active Withdrawn
- 2005-07-06 WO PCT/EP2005/053236 patent/WO2006008241A1/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020090975A1 (en) * | 2001-01-10 | 2002-07-11 | Keijo Laiho | Paging in a mobile telecommunication network |
| EP1318690A1 (en) * | 2001-12-05 | 2003-06-11 | Nokia Corporation | Call control method and arrangement |
| WO2004091246A1 (en) * | 2003-04-11 | 2004-10-21 | Telefonaktiebolaget Lm Ericsson (Publ) | Multi-access call setup |
Non-Patent Citations (1)
| Title |
|---|
| "Universal Mobile Telecommunications System (UMTS); Physical channels and mapping of transport channels onto physical channels (FDD) (3GPP TS 25.211 version 6.1.0 Release 6); ETSI TS 125 211", ETSI STANDARDS, EUROPEAN TELECOMMUNICATIONS STANDARDS INSTITUTE, SOPHIA-ANTIPO, FR, vol. 3-R1, no. V610, June 2004 (2004-06-01), XP014016683, ISSN: 0000-0001 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1774819A1 (en) | 2007-04-18 |
| FR2873250A1 (en) | 2006-01-20 |
| FR2873250B1 (en) | 2008-12-12 |
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