EP1839459A1 - Method by which one of the listeners participating in a group call can interrupt a speaker - Google Patents

Method by which one of the listeners participating in a group call can interrupt a speaker

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Publication number
EP1839459A1
EP1839459A1 EP06709094A EP06709094A EP1839459A1 EP 1839459 A1 EP1839459 A1 EP 1839459A1 EP 06709094 A EP06709094 A EP 06709094A EP 06709094 A EP06709094 A EP 06709094A EP 1839459 A1 EP1839459 A1 EP 1839459A1
Authority
EP
European Patent Office
Prior art keywords
speaker
interrupt
network
listener
request
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Withdrawn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
EP06709094A
Other languages
German (de)
French (fr)
Inventor
Marc Dorion
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.)
Sagemcom Energy and Telecom SAS
Original Assignee
Sagem Communications 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 Sagem Communications SAS filed Critical Sagem Communications SAS
Publication of EP1839459A1 publication Critical patent/EP1839459A1/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast
    • H04W76/45—Connection management for selective distribution or broadcast for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services

Definitions

  • the present invention relates to a method of interrupting the speaker of the moment of a group call by one of the listeners of said group call, said group call being established in a mobile telephone network, for example of the GSM (Global System for Mobile communications) supporting group calls.
  • GSM Global System for Mobile communications
  • GSM 02.68 GSM 03.68
  • GSM 04.68 GSM Recommendation 04.08
  • this VGCS service allows subscribers who belong to the same predefined group to communicate with each other, after establishing a group call (also called group call: group call), according to the principle of a single speaker ( talker), which is the only one at a given time during this group call to speak (it says in a group transmission mode: group transmit mode), destined for several listeners (listener) who can therefore only listen (they are said in a group reception mode: group receive mode).
  • group call also called group call: group call
  • the mobile station of the speaker uses for this purpose the uplink of a data channel, of the TCH (Traffic Channel) type and subsequently called Group Channel (GCH), but also the downlink (downlink). ) of the same GCH channel while the mobile station of each listener uses only the downstream channel.
  • the network warns all the subscribers of the group that the upstream channel of the group channel is free for access and this, by sending specific messages called UPLINK FREE. Conversely, when a speaker is present in a group during a group call, the network notifies the mobile stations of the listeners of the same group that the upstream channel of the group channel GCH is busy and by the sending of messages called UPLINK BUSY. If a subscriber wishes to be a speaker in a group for an already established group call, he makes a request to access the upstream channel of the group channel GCH by sending a specific message UPLINK ACCESS and an access procedure. the uplink access procedure is implemented.
  • this is to allow this subscriber to become a speaker and thus appropriate the rising channel of the GCH group channel when the upstream channel is free to access and conversely, to reject the access request of any subscriber when the uplink is not open access.
  • Recommendation GSM 04.08 and in particular to Chapters 3.1.2.3, 3.1.2.4, 3.3.1.2, 3.4.15, etc. It should be noted that at any time a speaker can return to the group reception mode and thus release access to the upstream channel.
  • the problem posed by this architecture is that, in the current state, it is not possible for a mobile station of a listener to interrupt a speaker during a group call as long as he does not made free access to the upstream channel of the group channel, because the mobile station of the speaker has during this group call, somehow the monopoly of the rising channel of the GCH group channel or a dedicated channel.
  • the only way nowadays for a listener to become the speaker of a group call is to wait until the current speaker has made access to the upstream channel of the group free and then to make an access request. to this rising path to become so speaker.
  • the present invention thus relates to a method of interrupting the speaker of the moment of a group call by one of the listeners of said group call, said group call being established in a mobile telephony network supporting group calls.
  • said method comprises the following steps: a) an access step of the mobile station of the requesting listener to a dedicated signaling channel in order to transmit to said network an interrupt request, b) a step of processing by the network of said request to decide whether to interrupt said speaker, and c) a step of interrupting the speaker when said network has decided said interruption.
  • said mobile station of the requesting listener accesses a part of said dedicated signaling channel reserved for any interruption request transmission of a mobile station. auditor.
  • said network warns said mobile listening stations which part of said dedicated signaling channel they must use to transmit their interrupt request.
  • said request contains an identifier of the group call to which said requesting listener belongs. It may also contain an identifier of the requesting subscriber.
  • said method comprises a step of processing the relative priority levels of the speaker and the listener wishing to interrupt the speaker.
  • This step of processing the relative priority levels can include:
  • a substep of comparing said priority level of the speaker transmitted to the priority level of the listener wishing to interrupt the speaker said step being implemented by the mobile station of said listener, said current speaker interrupt request being issued if the comparison sub-step reveals that the priority level of said listener is at least higher than that of the speaker.
  • It may also include a substep of comparing said priority level of the speaker with the priority level of the requesting listener, said step being implemented by said network, said request being rejected if the substep of comparison reveals that the priority level of said listener is at least higher than that of the speaker.
  • the priority level of the requesting listener can then be transmitted at the same time as or in said interrupt request or else be known to the network.
  • said method comprises a step of transmitting to the mobile station of said listener requesting a message as to the decision taken by the network.
  • Said request then comprises a random number which is retranscribed in said message as to the decision taken by the network.
  • FIG. 1 is a diagram of a mobile telephone system implementing a group call and, in a mode of operation called 1.5 channel mode
  • FIG. 2 is a diagram of a mobile telephony system implementing a group call and this in a mode of operation said mode 1 channel.
  • FIGs. 1 and 2 there are shown two cells C1 and C2 of the same area of a group call GCA (Group CaIl Area) and at a given moment during a group call where the cell C1 covers the mobile station of a speaker L as well as the mobile stations of some of the listeners A 1 and A 2 and where the cell C2 covers other mobile stations of listeners A 3 to A 5 .
  • GCA Group CaIl Area
  • other cells can also be implemented. They are functionally equivalent to the Cl cell.
  • a single group logical channel GCH (here again a group channel GCH 1 and a group channel GCH 2 for the cells C1 and Cl, respectively) is allocated to all the mobile stations of the subscribers of the group in communication, whether they are speaker or listeners.
  • the upstream channel of the group GCH is allocated to the single mobile station of the speaker L while the downlink is allocated to all the mobile stations of the subscribers of the group.
  • the speaker's mobile station may optionally disable its own reception of the downlink channel of the group GCH to avoid echo phenomena.
  • the rising channels of the channels GCH 1 and GCH 2 can not be used by the mobile stations of the listeners A 1 to A 5 .
  • a mobile station of a listener who wishes to interrupt the speaker issues a speaker interrupt request R on a dedicated signaling channel.
  • a dedicated signaling channel For example, it may be the channel SDCCH in GSM, channel normally provided for the transport of the signaling for the purpose of establishing a call and updating the location, for example. It is also used to transport SMS short messages.
  • the interrupt request R is specific to a request to interrupt the speaker of a group call. It may contain an identifier ID of the relevant group call, although this is not strictly necessary since the SDCCH signaling channel is dedicated.
  • the identifier ID which is involved here is for example that described in chapter 9 of 3GPP TS 03.68.
  • It can also be accompanied by a random number which will be used for the recognition of the response to the request made by the network and which allows the mobile station to ensure that this response is intended for him. It is accompanied by an identifier of the requesting subscriber, such as the IMSI identifier
  • the network receives the request R emanating from the requesting mobile station (in this case the mobile station A 4 ), processes it to decide whether to interrupt the speaker or not, and returns, on the downlink of the group channel GCH, a REP response to this decision.
  • REP response is copied, if necessary, the random number of the request which allows the requesting mobile station to ensure that this answer is intended for him.
  • the network causes the interruption so that the speaker becomes a listener and the DCH dedicated channel or the upstream channel of the group GCH, as the case may be, is now assigned to the requesting mobile station, in this case the mobile station A 4 , which becomes mobile speaker station.
  • the mobile station of the applicant A 4 goes into group transmission mode, for example, upon receipt of the network response.
  • the network also transmits an interrupt command to the speaker's mobile station which then goes into group receive mode.
  • the processing performed by the network consists in determining the identity of the requesting listener on the basis of his subscriber identifier (for example IMSI or TMSI) contained in the request R 5 determines the group call concerned by the request of this listener, and this, on the basis of the ID group ID contained in the query, and deduced from this group call the identity of the speaker of the moment. It is on the basis of the identity of the requesting listener and the identity of the speaker that the decision is made to interrupt or not the speaker.
  • a mobile station of a listener wishing to interrupt the speaker of the moment of a group call leaves its active mode of operation (active mode) and goes into the standby mode of operation, said mode "idle".
  • the network acknowledges the reception of this access on the channel provided for this purpose, namely the AGCH channel, which points to a dedicated SDCCH signaling channel on which the mobile station identifies and then transmits the interrupt request R.
  • the REP response from the network to this request is performed on the downlink of the GCH group channel as before.
  • the requesting mobile station reverts to its active mode of operation.
  • the advantage of this variant is to be able to perform the request R on a dedicated signaling channel and, for this purpose, to use the known network access protocol.
  • the system of the present invention may provide for the processing of a priority of being a speaker.
  • this priority processing is performed at the mobile stations.
  • a mobile station becomes the station of the speaker of a group, it informs the network of its identity but also of its priority level, for example by means of a specific message, such as the message says "TALKER INDICATION" as defined in ETSI TS 100
  • the network then informs, by a message that can be called "TALKER INFORMATION" transmitted on the downlink of the GCH group channel, each mobile station of the group of the priority level of the mobile station of the speaker of the group.
  • his own mobile station Prior to the transmission of the request, compares the priority level of the current speaker to his. If it is less than or equal to his, the request is transmitted to the network as previously described. On the other hand, if it is superior, the request is not transmitted and the requesting auditor is informed that his request is directly rejected.
  • this priority processing is performed at the network level.
  • the network compares the priority level of the current speaker with the listener's priority level. applicant. The network is aware of this level either because it is registered in the request itself or because it is known to the network (it is for example contained in a database listing for each listener its priority level) . If the priority level of the speaker is less than or equal to the priority level of the requesting listener, the request is accepted and is rejected in the opposite case.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention relates to a method by which one of the listeners participating in a group call can interrupt a speaker, said group call taking place in a mobile telephone network that allows group calls. The inventive method is characterised in that it comprises the following steps, namely: a) a step in which the mobile station of the requesting listener accesses a dedicated signalling channel in order to transmit an interruption request to the network, b) a step in which the network processes the request in order to decide whether or not to interrupt the speaker, and c) a step in which the speaker is interrupted when the network has decided to do so.

Description

Procédé d'interruption du locuteur du moment d'un appel de groupe par un des auditeurs dudit appel de groupe Method of interrupting the speaker of the moment of a group call by one of the listeners of said group call
La présente invention concerne un procédé d'interruption du locuteur du moment d'un appel de groupe par un des auditeurs dudit appel de groupe, ledit appel de groupe étant établi dans un réseau de téléphonie mobile, par exemple du type GSM (Global System for Mobile communications) supportant des appels de groupe.The present invention relates to a method of interrupting the speaker of the moment of a group call by one of the listeners of said group call, said group call being established in a mobile telephone network, for example of the GSM (Global System for Mobile communications) supporting group calls.
Dans le système de téléphonie mobile GSM normalisé à l'ETSI (EuropeanIn the GSM mobile telephone system standardized at ETSI (European
Télécommunications Standards Institute : Institut européen des standards de télécommunications), est prévu un service vocal d'appel de groupe VGCS (VoiceTelecommunications Standards Institute: European Telecommunications Standards Institute), a VGCS Voice Call Service (Voice
Group CaIl Service) avec lequel il est possible d'établir sur la liaison radio une conversation avec un groupe prédéfini d'abonnés dans un mode half duplex. Un description de ce service est donnée dans les recommandations de l'ETSI référencées respectivement GSM 02.68, GSM 03.68 et GSM 04.68. Certains alinéas de la recommandation GSM 04.08 sont également relatifs à ce service.Group CaIl Service) with which it is possible to establish on the radio link a conversation with a predefined group of subscribers in a half duplex mode. A description of this service is given in the recommendations of ETSI referenced respectively GSM 02.68, GSM 03.68 and GSM 04.68. Some paragraphs of GSM Recommendation 04.08 also relate to this service.
Plus précisément, ce service VGCS permet à des abonnés qui appartiennent à un même groupe prédéfini de communiquer entre eux, après établissement d'une communication de groupe (encore appelée appel de groupe : group call), selon le principe d'un seul locuteur (talker), qui est le seul à un moment donné au cours de cet appel de groupe à avoir la parole (il est dit dans un mode de transmission de groupe : group transmit mode), à destination de plusieurs auditeurs (listener) qui ne peuvent par conséquent qu'écouter (ils sont dits dans un mode de réception de groupe : group receive mode). La station mobile du locuteur utilise pour ce faire la voie montante (uplink) d'un canal de données, du type TCH (Trafic Channel) et appelé par la suite canal de groupe GCH (Group Channel), mais également la voie descendante (downlink) du même canal GCH alors que la station mobile de chaque auditeur n'utilise que la voie descendante. Lorsqu'aucun locuteur n'est présent dans un groupe, le réseau avertit l'ensemble des abonnés du groupe que la voie montante du canal de groupe est libre pour accès et, ce, par l'envoi de messages spécifiques dits UPLINK FREE. A l'inverse, lorsqu'un locuteur est présent dans un groupe pendant un appel de groupe, le réseau avertit les stations mobiles des auditeurs du même groupe que la voie montant du canal de groupe GCH est occupée et, ce, par l'envoi de messages appelés UPLINK BUSY. Si un abonné souhaite être locuteur dans un groupe pour un appel de groupe déjà établi, il fait une requête d'accès à la voie montant du canal de groupe GCH par l'envoi d'un message spécifique UPLINK ACCESS et une procédure d'accès au canal montant (Uplink access procédure) est mise en œuvre. Essentiellement, celle-ci consiste à permettre à cet abonné de devenir locuteur et d'ainsi s'approprier la voie montante du canal de groupe GCH lorsque cette voie montante est libre d'accès et inversement, à rejeter la requête d'accès de tout abonné lorsque la voie montante n'est pas libre d'accès. Pour plus de détails sur cette procédure, on pourra se reporter utilement à la recommandation GSM 04.08 et notamment aux chapitres 3.1.2.3, 3.1.2.4, 3.3.1.2, 3.4.15, etc. On notera qu'à tout moment un locuteur peut revenir dans le mode de réception de groupe et ainsi libérer l'accès au canal montant. Le problème que pose cette architecture est que, dans l'état actuel, il n'est pas possible pour une station mobile d'un auditeur d'interrompre un locuteur en cours d'appel de groupe tant que celui-ci n'a pas rendu libre l'accès à la voie montante du canal de groupe, car la station mobile du locuteur a pendant cet appel de groupe, en quelque sorte le monopole de la voie montante du canal de groupe GCH ou d'un canal dédié. Le seul moyen aujourd'hui pour un auditeur de devenir le locuteur d'un appel de groupe est d'attendre que le locuteur du moment ait rendu libre l'accès à la voie montante du canal de groupe puis de faire une demande d'accès à cette voie montante pour devenir ainsi locuteur. II y a donc, dans le système qui a été présenté ci-dessus, un besoin pour la mise en place de moyens permettant à un auditeur d'interrompre un locuteur pour le ramener à l'état d'auditeur et pour devenir lui-même un locuteur.More specifically, this VGCS service allows subscribers who belong to the same predefined group to communicate with each other, after establishing a group call (also called group call: group call), according to the principle of a single speaker ( talker), which is the only one at a given time during this group call to speak (it says in a group transmission mode: group transmit mode), destined for several listeners (listener) who can therefore only listen (they are said in a group reception mode: group receive mode). The mobile station of the speaker uses for this purpose the uplink of a data channel, of the TCH (Traffic Channel) type and subsequently called Group Channel (GCH), but also the downlink (downlink). ) of the same GCH channel while the mobile station of each listener uses only the downstream channel. When no speaker is present in a group, the network warns all the subscribers of the group that the upstream channel of the group channel is free for access and this, by sending specific messages called UPLINK FREE. Conversely, when a speaker is present in a group during a group call, the network notifies the mobile stations of the listeners of the same group that the upstream channel of the group channel GCH is busy and by the sending of messages called UPLINK BUSY. If a subscriber wishes to be a speaker in a group for an already established group call, he makes a request to access the upstream channel of the group channel GCH by sending a specific message UPLINK ACCESS and an access procedure. the uplink access procedure is implemented. Essentially, this is to allow this subscriber to become a speaker and thus appropriate the rising channel of the GCH group channel when the upstream channel is free to access and conversely, to reject the access request of any subscriber when the uplink is not open access. For more details on this procedure, reference may be made to Recommendation GSM 04.08 and in particular to Chapters 3.1.2.3, 3.1.2.4, 3.3.1.2, 3.4.15, etc. It should be noted that at any time a speaker can return to the group reception mode and thus release access to the upstream channel. The problem posed by this architecture is that, in the current state, it is not possible for a mobile station of a listener to interrupt a speaker during a group call as long as he does not made free access to the upstream channel of the group channel, because the mobile station of the speaker has during this group call, somehow the monopoly of the rising channel of the GCH group channel or a dedicated channel. The only way nowadays for a listener to become the speaker of a group call is to wait until the current speaker has made access to the upstream channel of the group free and then to make an access request. to this rising path to become so speaker. There is, therefore, in the system which has been presented above, a need for the establishment of means allowing an auditor to interrupt a speaker to bring him back to the state of auditor and to become himself a speaker.
La présente invention concerne donc un procédé d'interruption du locuteur du moment d'un appel de groupe par un des auditeurs dudit appel de groupe, ledit appel de groupe étant établi dans un réseau de téléphonie mobile supportant des appels de groupe.The present invention thus relates to a method of interrupting the speaker of the moment of a group call by one of the listeners of said group call, said group call being established in a mobile telephony network supporting group calls.
Selon une caractéristique de l'invention, ledit procédé comporte les étapes suivantes : a) une étape d'accès de la station mobile de l'auditeur requérant à un canal de signalisation dédié afin de transmettre audit réseau une requête d'interruption, b) une étape de traitement par le réseau de ladite requête pour décider d'interrompre ou pas ledit locuteur, et c) une étape d'interruption du locuteur lorsque ledit réseau a décidé ladite interruption.According to one characteristic of the invention, said method comprises the following steps: a) an access step of the mobile station of the requesting listener to a dedicated signaling channel in order to transmit to said network an interrupt request, b) a step of processing by the network of said request to decide whether to interrupt said speaker, and c) a step of interrupting the speaker when said network has decided said interruption.
Selon une autre caractéristique de la présente invention, pour transmettre ladite requête d'interruption, ladite station mobile de l'auditeur requérant accède à une partie dudit canal de signalisation dédié réservée à toute transmission de requête d'interruption d'une station mobile d'auditeur. Avantageusement, ledit réseau avertit lesdites stations mobiles d'auditeur quelle partie dudit canal de signalisation dédié, elles doivent utiliser pour transmettre leur requête d'interruption.According to another characteristic of the present invention, in order to transmit said interrupt request, said mobile station of the requesting listener accesses a part of said dedicated signaling channel reserved for any interruption request transmission of a mobile station. auditor. Advantageously, said network warns said mobile listening stations which part of said dedicated signaling channel they must use to transmit their interrupt request.
Avantageusement, ladite requête contient un identificateur de l'appel de groupe auquel appartient ledit auditeur requérant. Elle peut contenir de plus un identificateur de l'abonné requérant.Advantageously, said request contains an identifier of the group call to which said requesting listener belongs. It may also contain an identifier of the requesting subscriber.
Avantageusement, ledit procédé comporte une étape de traitement des niveaux de priorité relatifs du locuteur et de l'auditeur désirant interrompre le locuteur. Cette étape de traitement des niveaux de priorité relatifs peut comprendre :Advantageously, said method comprises a step of processing the relative priority levels of the speaker and the listener wishing to interrupt the speaker. This step of processing the relative priority levels can include:
- une sous-étape de transmission à chacun desdits auditeurs de l'appel de groupe du niveau de priorité du locuteur du moment,a substep of transmitting to each of said listeners the group call of the priority level of the speaker of the moment,
- une sous-étape de comparaison dudit niveau de priorité du locuteur transmis au niveau de priorité de l'auditeur désirant interrompre le locuteur, ladite étape étant mise en œuvre par la station mobile dudit auditeur, ladite requête d'interruption du locuteur du moment étant émise si la sous-étape de comparaison révèle que le niveau de priorité dudit auditeur est au moins supérieur à celui du locuteur.a substep of comparing said priority level of the speaker transmitted to the priority level of the listener wishing to interrupt the speaker, said step being implemented by the mobile station of said listener, said current speaker interrupt request being issued if the comparison sub-step reveals that the priority level of said listener is at least higher than that of the speaker.
Elle peut également comprendre une sous-étape de comparaison dudit niveau de priorité du locuteur au niveau de priorité de l'auditeur requérant, ladite étape étant mise en œuvre par ledit réseau, ladite requête étant rejetée si la sous-étape de comparaison révèle que le niveau de priorité dudit auditeur est au moins supérieur à celui du locuteur.It may also include a substep of comparing said priority level of the speaker with the priority level of the requesting listener, said step being implemented by said network, said request being rejected if the substep of comparison reveals that the priority level of said listener is at least higher than that of the speaker.
Le niveau de priorité de l'auditeur requérant peut alors être transmis, en même temps que ou dans ladite requête d'interruption ou, encore, être est connu du réseau.The priority level of the requesting listener can then be transmitted at the same time as or in said interrupt request or else be known to the network.
Avantageusement, ledit procédé comprend une étape de transmission à la station mobile dudit auditeur requérant d'un message quant à la décision prise par le réseau. Ladite requête comprend alors un nombre aléatoire qui est retranscrite dans ledit message quant à la décision prise par le réseau. Les caractéristiques de l'invention mentionnées ci-dessus, ainsi que d'autres, apparaîtront plus clairement à la lecture de la description suivante d'un exemple de réalisation, ladite description étant faite en relation avec le dessin joint dans lequel :Advantageously, said method comprises a step of transmitting to the mobile station of said listener requesting a message as to the decision taken by the network. Said request then comprises a random number which is retranscribed in said message as to the decision taken by the network. The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, said description being made in relation to the attached drawing in which:
La Fig. 1 est un schéma d'un système de téléphonie mobile mettant en œuvre un appel de groupe et, ce, dans un mode de fonctionnement dit mode 1.5 canal, La Fig. 2 est un schéma d'un système de téléphonie mobile mettant en œuvre un appel de groupe et, ce, dans un mode de fonctionnement dit mode 1 canal.Fig. 1 is a diagram of a mobile telephone system implementing a group call and, in a mode of operation called 1.5 channel mode, FIG. 2 is a diagram of a mobile telephony system implementing a group call and this in a mode of operation said mode 1 channel.
Dans un système de téléphonie mobile du type GSM permettant la mise en œuvre des appels de groupe, il existe deux modes de fonctionnement dépendant de l'allocation à la station mobile du locuteur soit d'un canal dédié DCH, soit d'un canal du type canal de trafic TCH, que l'on nomme, compte tenu du contexte, canal de groupe GCH. Le premier mode de fonctionnement, généralement appelé "mode 1.5 canal", est décrit en relation avec la Fig. 1. Quant au second mode, généralement appelé "mode 1 canal", il est décrit en relation avec la Fig. 2.In a GSM-type mobile telephone system that makes it possible to implement group calls, there are two modes of operation depending on the allocation to the mobile station of the speaker of either a dedicated channel DCH or a channel of the group. type of traffic channel TCH, which is called, given the context, group channel GCH. The first mode of operation, generally referred to as "1.5 channel mode", is described in connection with FIG. 1. As for the second mode, generally referred to as "channel 1 mode", it is described in connection with FIG. 2.
Dans ces Figs. 1 et 2, on a représenté deux cellules Cl et C2 d'une même aire d'un appel de groupe GCA (Group CaIl Area) et, ce, à un moment donné au cours d'un appel de groupe où la cellule Cl couvre la station mobile d'un locuteur L ainsi que les stations mobiles de certains des auditeurs A1 et A2 et où la cellule C2 couvre d'autres stations mobiles d'auditeurs A3 à A5. On notera que d'autres cellules peuvent également être mises en œuvre. Elles sont fonctionnellement équivalentes à la cellule Cl.In these Figs. 1 and 2, there are shown two cells C1 and C2 of the same area of a group call GCA (Group CaIl Area) and at a given moment during a group call where the cell C1 covers the mobile station of a speaker L as well as the mobile stations of some of the listeners A 1 and A 2 and where the cell C2 covers other mobile stations of listeners A 3 to A 5 . Note that other cells can also be implemented. They are functionally equivalent to the Cl cell.
Dans le premier mode de fonctionnement (Fig. 1), est alloué à la station mobile du locuteur L un canal dédié DCH composé d'une voie montante (flèche en direction de la cellule Cl) et d'une voie descendante (flèche en direction de la station du locuteur L) alors qu'à toutes les stations mobiles des auditeurs A1 à An (ici n = 5) est alloué un canal de groupe GCH (unique canal logique) qui, au niveau physique, se divise en un canal de groupe GCH1 pour la cellule Cl et en un canal de groupe GCH2 pour la cellule Cl, eux-mêmes composés chacun d'une voie descendante (flèches en direction des stations des auditeurs) et d'une voie montante mais cette dernière n'est pas utilisée (d'où l'absence de flèches sur la Fig. 1). On précisera que les canaux GCH1 et GCH2 sont des canaux physiques.In the first operating mode (Fig. 1), a talker channel DCH consisting of an upstream channel (arrow in the direction of the cell C1) and a downlink channel (arrow in the direction of the cell C1) is allocated to the mobile station of the speaker L. of the speaker station L) while at all the mobile stations of the listeners A 1 to A n (here n = 5) is allocated a group channel GCH (single logical channel) which, at the physical level, is divided into a group channel GCH 1 for the cell C1 and in a group channel GCH 2 for the cell C1, themselves each composed of a downlink (arrows towards the stations of the listeners) and a rising channel but the latter is not used (hence the absence of arrows in Fig. 1). It will be specified that the channels GCH 1 and GCH 2 are physical channels.
Dans le second mode de fonctionnement (Fig. 2), il n'y a pas de canal dédié à la station mobile du locuteur L comme précédemment. Par contre, un seul canal logique de groupe GCH (là aussi un canal de groupe GCH1 et un canal de groupe GCH2 pour respectivement les cellules Cl et Cl) est alloué à l'ensemble des stations mobiles des abonnés du groupe en communication, qu'ils soient locuteur ou auditeurs. La voie montante du canal de groupe GCH est allouée à la seule station mobile du locuteur L alors que la voie descendante est allouée à toutes les stations mobiles des abonnés du groupe. La station mobile du locuteur peut éventuellement désactiver sa propre réception de la voie descendante du canal de groupe GCH pour éviter des phénomènes d'échos.In the second mode of operation (Fig. 2), there is no channel dedicated to the mobile station of the speaker L as before. On the other hand, a single group logical channel GCH (here again a group channel GCH 1 and a group channel GCH 2 for the cells C1 and Cl, respectively) is allocated to all the mobile stations of the subscribers of the group in communication, whether they are speaker or listeners. The upstream channel of the group GCH is allocated to the single mobile station of the speaker L while the downlink is allocated to all the mobile stations of the subscribers of the group. The speaker's mobile station may optionally disable its own reception of the downlink channel of the group GCH to avoid echo phenomena.
Comme mentionné dans le préambule de la présente description, les voies montantes des canaux GCH1 et GCH2 ne peuvent pas être utilisées par les stations mobiles des auditeurs A1 à A5.As mentioned in the preamble of the present description, the rising channels of the channels GCH 1 and GCH 2 can not be used by the mobile stations of the listeners A 1 to A 5 .
Selon la présente invention, une station mobile d'un auditeur qui souhaite interrompre le locuteur émet une requête d'interruption R de locuteur sur un canal de signalisation dédié. Par exemple, il peut s'agir du canal noté SDCCH en GSM, canal normalement prévu pour le transport de la signalisation à des fins d'établissement d'un appel et de mise à jour de la localisation, par exemple. Il sert également au transport des messages courts SMS.According to the present invention, a mobile station of a listener who wishes to interrupt the speaker issues a speaker interrupt request R on a dedicated signaling channel. For example, it may be the channel SDCCH in GSM, channel normally provided for the transport of the signaling for the purpose of establishing a call and updating the location, for example. It is also used to transport SMS short messages.
Dans la pratique, ce n'est qu'une partie de ce canal de signalisation SDCCH qui est réservée, par le réseau, à cette application particulière. Une information est transmise du réseau aux stations mobiles d'auditeur pour les avertir quelle partie du canal de signalisation SDCCH elles doivent utiliser pour émettre leur requête d'interruption R.In practice, only part of this SDCCH signaling channel is reserved by the network for this particular application. Information is transmitted from the network to mobile listener stations to warn them which part of the SDCCH signaling channel they must use to issue their interrupt request R.
La requête d'interruption R est spécifique à une demande d'interruption du locuteur d'un appel de groupe. Elle peut contenir un identificateur ID de l'appel de groupe concerné, bien que cela ne soit pas strictement nécessaire dans la mesure où la canal de signalisation SDCCH est dédié. L'identificateur ID dont il s'agit ici est par exemple celui qui est décrit dans le chapitre 9 du document 3GPP TS 03.68.The interrupt request R is specific to a request to interrupt the speaker of a group call. It may contain an identifier ID of the relevant group call, although this is not strictly necessary since the SDCCH signaling channel is dedicated. The identifier ID which is involved here is for example that described in chapter 9 of 3GPP TS 03.68.
Elle peut également être accompagnée d'un nombre aléatoire qui servira pour la reconnaissance de la réponse à la requête faite par le réseau et qui permet à la station mobile de s'assurer que cette réponse lui est bien destinée. Elle est accompagnée d'un identificateur de l'abonné requérant, comme par exemple l'identificateur IMSIIt can also be accompanied by a random number which will be used for the recognition of the response to the request made by the network and which allows the mobile station to ensure that this response is intended for him. It is accompanied by an identifier of the requesting subscriber, such as the IMSI identifier
(International Mobile Subscriber Identity) ou l'identificateur TMSI (Temporary(International Mobile Subscriber Identity) or TMSI Identifier (Temporary
Mobile Subscriber Identity) décrits dans le chapitre 2 du document 3GPP TS 03.03.Mobile Subscriber Identity) described in Chapter 2 of 3GPP TS 03.03.
Le réseau reçoit la requête R émanant de la station mobile requérante (en l'occurrence la station mobile A4), la traite pour décider d'interrompre ou pas le locuteur, et renvoie, sur la voie descendante du canal de groupe GCH, une réponse REP quant à cette décision. Dans cette réponse REP, est recopié, le cas échéant, le nombre aléatoire de la requête ce qui permet à la station mobile requérante de s'assurer que cette réponse lui est bien destinée. En cas de décision d'interrompre, le réseau provoque l'interruption si bien que le locuteur devient un auditeur et le canal dédié DCH ou la voie montante du canal du groupe GCH, selon le cas, est maintenant affecté à la station mobile requérante, en l'occurrence la station mobile A4, qui devient station mobile de locuteur. La station mobile du requérant A4 passe en mode de transmission de groupe, par exemple, à la réception de la réponse du réseau. Le réseau transmet également une commande d'interruption à la station mobile du locuteur qui passe alors en mode de réception de groupe.The network receives the request R emanating from the requesting mobile station (in this case the mobile station A 4 ), processes it to decide whether to interrupt the speaker or not, and returns, on the downlink of the group channel GCH, a REP response to this decision. In this REP response, is copied, if necessary, the random number of the request which allows the requesting mobile station to ensure that this answer is intended for him. In case of a decision to interrupt, the network causes the interruption so that the speaker becomes a listener and the DCH dedicated channel or the upstream channel of the group GCH, as the case may be, is now assigned to the requesting mobile station, in this case the mobile station A 4 , which becomes mobile speaker station. The mobile station of the applicant A 4 goes into group transmission mode, for example, upon receipt of the network response. The network also transmits an interrupt command to the speaker's mobile station which then goes into group receive mode.
Le traitement effectué par le réseau consiste à déterminer l'identité de l'auditeur requérant sur la base de son identificateur d'abonné (par exemple IMSI ou TMSI) contenu dans la requête R5 détermine l'appel de groupe concerné par la requête de cet auditeur et, ce, sur la base de l'identificateur de groupe ID contenu dans la requête, et déduit de cet appel de groupe l'identité du locuteur du moment. C'est sur la base de l'identité de l'auditeur requérant et de l'identité du locuteur que la décision est prise d'interrompre ou pas le locuteur. Dans une variante de réalisation une station mobile d'un auditeur souhaitant interrompre le locuteur du moment d'un appel de groupe quitte son mode de fonctionnement actif (active mode) et passe dans le mode de fonctionnement en veille, mode dit "idle". Alors, elle effectue, comme précédemment, un accès au canal d'accès commun tel que le canal RACH. Le réseau acquitte la réception de cet accès sur le canal prévu à cet effet, soit le canal AGCH, lequel pointe un canal de signalisation dédié SDCCH sur lequel la station mobile s'identifie et transmet alors la requête d'interruption R. La réponse REP du réseau à cette requête est effectuée sur la voie descendante du canal de groupe GCH comme précédemment. La station mobile requérante repasse dans son mode de fonctionnement actif.The processing performed by the network consists in determining the identity of the requesting listener on the basis of his subscriber identifier (for example IMSI or TMSI) contained in the request R 5 determines the group call concerned by the request of this listener, and this, on the basis of the ID group ID contained in the query, and deduced from this group call the identity of the speaker of the moment. It is on the basis of the identity of the requesting listener and the identity of the speaker that the decision is made to interrupt or not the speaker. In an alternative embodiment a mobile station of a listener wishing to interrupt the speaker of the moment of a group call leaves its active mode of operation (active mode) and goes into the standby mode of operation, said mode "idle". Then, it performs, as previously, access to the common access channel such as the RACH channel. The network acknowledges the reception of this access on the channel provided for this purpose, namely the AGCH channel, which points to a dedicated SDCCH signaling channel on which the mobile station identifies and then transmits the interrupt request R. The REP response from the network to this request is performed on the downlink of the GCH group channel as before. The requesting mobile station reverts to its active mode of operation.
L'intérêt de cette variante est de pouvoir effectuer la requête R sur un canal de signalisation dédié et, pour ce faire, d'utiliser le protocole connu d'accès au réseau.The advantage of this variant is to be able to perform the request R on a dedicated signaling channel and, for this purpose, to use the known network access protocol.
Le système de la présente invention peut prévoir le traitement d'une priorité d'être locuteur. Selon un premier mode de réalisation, ce traitement d'une priorité est réalisé au niveau des stations mobiles. Au moment où une station mobile devient la station du locuteur d'un groupe, elle informe le réseau de son identité mais également de son niveau de priorité, par exemple au moyen d'un message spécifique, tel que le message dit "TALKER INDICATION" tel que défini dans le document ETSI TS 100The system of the present invention may provide for the processing of a priority of being a speaker. According to a first embodiment, this priority processing is performed at the mobile stations. At the moment when a mobile station becomes the station of the speaker of a group, it informs the network of its identity but also of its priority level, for example by means of a specific message, such as the message says "TALKER INDICATION" as defined in ETSI TS 100
940 au chapitre 9.1.44. Le réseau informe alors, par un message que l'on pourra appeler "TALKER INFORMATION" transmis sur la voie descendante du canal de groupe GCH, chaque station mobile du groupe du niveau de priorité de la station mobile du locuteur du groupe.940 in Chapter 9.1.44. The network then informs, by a message that can be called "TALKER INFORMATION" transmitted on the downlink of the GCH group channel, each mobile station of the group of the priority level of the mobile station of the speaker of the group.
On notera que l'information concernant la partie du canal de signalisation SDCCH affectée à l'interruption de locuteur pourrait être placée dans le message "TALKER INFORMATION".It will be noted that the information concerning the part of the SDCCH signaling channel assigned to the speaker interruption could be placed in the "TALKER INFORMATION" message.
Au moment où l'auditeur effectue une requête d'interruption du locuteur, sa propre station mobile, avant la transmission de la requête, compare le niveau de priorité du locuteur actuel au sien. S'il est inférieur ou égal au sien, la requête est transmise au réseau comme précédemment décrit. Par contre s'il est supérieur, la requête n'est pas transmise et l'auditeur requérant est averti que sa requête est directement rejetée.At the time the listener makes a request to interrupt the speaker, his own mobile station, prior to the transmission of the request, compares the priority level of the current speaker to his. If it is less than or equal to his, the request is transmitted to the network as previously described. On the other hand, if it is superior, the request is not transmitted and the requesting auditor is informed that his request is directly rejected.
Selon un autre mode de réalisation, ce traitement d'une priorité est réalisé au niveau du réseau. Lorsque la requête de l'auditeur est reçue par le réseau, celui-ci compare le niveau de priorité du locuteur actuel au niveau de priorité de l'auditeur requérant. Le réseau a connaissance de ce niveau soit parce qu'il est inscrit dans la requête elle-même, soit parce qu'il est connu du réseau (il est par exemple contenu dans une base de données répertoriant pour chaque auditeur son niveau de priorité). Si le niveau de priorité du locuteur est inférieur ou égal au niveau de priorité de l'auditeur requérant, la requête est acceptée et elle est rejetée dans le cas contraire. According to another embodiment, this priority processing is performed at the network level. When the listener's request is received by the network, the network compares the priority level of the current speaker with the listener's priority level. applicant. The network is aware of this level either because it is registered in the request itself or because it is known to the network (it is for example contained in a database listing for each listener its priority level) . If the priority level of the speaker is less than or equal to the priority level of the requesting listener, the request is accepted and is rejected in the opposite case.

Claims

REVENDICATIONS
1) Procédé d'interruption du locuteur du moment d'un appel de groupe par un des auditeurs dudit appel de groupe, ledit appel de groupe étant établi dans un réseau de téléphonie mobile supportant des appels de groupe, caractérisé en ce qu'il comporte les étapes suivantes : a) une étape d'accès de la station mobile de l'auditeur requérant à un canal de signalisation dédié afin de transmettre audit réseau une requête d'interruption, b) une étape de traitement par le réseau de ladite requête pour décider d'interrompre ou pas ledit locuteur, et c) une étape d'interruption du locuteur lorsque ledit réseau a décidé ladite interruption.1) A method of interrupting the speaker of the moment of a group call by one of the listeners of said group call, said group call being established in a mobile network supporting group calls, characterized in that it comprises the following steps: a) an access step of the mobile station of the requesting listener to a dedicated signaling channel in order to transmit to said network an interrupt request, b) a step of processing by the network of said request for decide whether to interrupt said speaker, and c) a step of interrupting the speaker when said network has decided said interruption.
2) Procédé d'interruption selon la revendication 1, caractérisé en ce que, pour transmettre ladite requête d'interruption, ladite station mobile de l'auditeur requérant accède à une partie dudit canal de signalisation dédié réservée à toute transmission de requête d'interruption d'une station mobile d'auditeur.2) Interrupt method according to claim 1, characterized in that, to transmit said interrupt request, said mobile station of the requesting listener accesses a part of said dedicated signaling channel reserved for any interrupt request transmission. of a mobile auditor station.
3) Procédé d'interruption selon la revendication 2, caractérisé en ce que ledit réseau avertit lesdites stations mobiles d'auditeur quelle partie dudit canal de signalisation dédié, elles doivent utiliser pour transmettre leur requête d'interruption.3) A method of interruption according to claim 2, characterized in that said network warns said mobile listening stations which part of said dedicated signaling channel they must use to transmit their interrupt request.
4) Procédé d'interruption selon une des revendications précédentes, caractérisé en ce que ladite requête contient un identificateur de l'appel de groupe auquel appartient ledit auditeur requérant.4) Interrupt method according to one of the preceding claims, characterized in that said request contains an identifier of the group call to which said requesting listener.
5) Procédé d'interruption selon une des revendications précédentes, caractérisé en ce que ladite requête contient un identificateur de l'abonné requérant.5) Interrupt method according to one of the preceding claims, characterized in that said request contains an identifier of the requesting subscriber.
6) Procédé d'interruption selon une des revendications précédentes, caractérisé en ce qu'il comporte une étape de traitement des niveaux de priorité relatifs du locuteur et de l'auditeur désirant interrompre le locuteur.6) A method of interruption according to one of the preceding claims, characterized in that it comprises a step of processing the relative priority levels of the speaker and the listener wanting to interrupt the speaker.
7) Procédé d'interruption selon la revendication 6, caractérisé en ce que ladite étape de traitement des niveaux de priorité relatifs comprend : - une sous-étape de transmission à chacun desdits auditeurs de l'appel de groupe du niveau de priorité du locuteur du moment,7) Interrupt method according to claim 6, characterized in that said step of processing the relative priority levels comprises: a substep of transmitting to each of said listeners the group call of the priority level of the speaker of the moment,
- une sous-étape de comparaison dudit niveau de priorité du locuteur transmis au niveau de priorité de l'auditeur désirant interrompre le locuteur, ladite étape étant mise en œuvre par la station mobile dudit auditeur, ladite requête d'interruption du locuteur du moment étant émise si la sous-étape de comparaison révèle que le niveau de priorité dudit auditeur est au moins supérieur à celui du locuteur.a substep of comparing said priority level of the speaker transmitted to the priority level of the listener wanting to interrupt the speaker, said step being implemented by the mobile station of said listener, said request for interruption of the speaker of the moment being issued if the substep of comparison reveals that the priority level of said listener is at least higher than that of the speaker.
8) Procédé d'interruption selon la revendication 6, caractérisé en ce que ladite étape de traitement des niveaux de priorité relatifs comprend une sous-étape de comparaison dudit niveau de priorité du locuteur au niveau de priorité de l'auditeur requérant, ladite étape étant mise en œuvre par ledit réseau, ladite requête étant rejetée si la sous-étape de comparaison révèle que le niveau de priorité dudit auditeur est au moins supérieur à celui du locuteur.The interrupting method according to claim 6, characterized in that said step of processing the relative priority levels comprises a substep of comparing said priority level of the speaker with the priority level of the requesting listener, said step being implemented by said network, said request being rejected if the substep of comparison reveals that the priority level of said listener is at least higher than that of the speaker.
9) Procédé d'interruption selon la revendication 8, caractérisé en ce que le niveau de priorité de l'auditeur requérant est transmis, en même temps que ou dans ladite requête d'interruption.9) Interrupt method according to claim 8, characterized in that the priority level of the requesting listener is transmitted at the same time as or in said interrupt request.
10) Procédé d'interruption selon la revendication 8, caractérisé en ce que le niveau de priorité de chacun des abonnés d'un appel de groupe est connu du réseau.10) Interrupt method according to claim 8, characterized in that the priority level of each of the subscribers of a group call is known to the network.
11) Procédé d'interruption selon une des revendications précédentes, caractérisé en ce qu'il comprend une étape de transmission à la station mobile dudit auditeur requérant d'un message quant à la décision prise par le réseau.11) Interruption method according to one of the preceding claims, characterized in that it comprises a step of transmitting to the mobile station of said listener requesting a message as to the decision taken by the network.
12) Procédé d'interruption selon la revendication 11, caractérisé en ce que ladite requête comprend un nombre aléatoire qui est retranscrite dans ledit message quant à la décision prise par le réseau. 12) Interrupt method according to claim 11, characterized in that said request comprises a random number which is retranscribed in said message as to the decision taken by the network.
EP06709094A 2005-01-12 2006-01-11 Method by which one of the listeners participating in a group call can interrupt a speaker Withdrawn EP1839459A1 (en)

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FR0500336A FR2880761B1 (en) 2005-01-12 2005-01-12 METHOD FOR INTERRUPTING THE SPEAKER FROM THE MOMENT OF A GROUP CALL BY AN AUDITOR OF SAID GROUP CALL
PCT/FR2006/000087 WO2006075105A1 (en) 2005-01-12 2006-01-11 Method by which one of the listeners participating in a group call can interrupt a speaker

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WO1998025423A1 (en) * 1996-12-02 1998-06-11 Nokia Telecommunications Oy Maintenance of group call in mobile communication system

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FI92365C (en) * 1993-01-26 1994-10-25 Nokia Telecommunications Oy Procedure, base station at a radio telephone system and radio telephone exchange to distribute voice calls for making conference calls between subscribers located in the service area of a number of exchanges
US6295284B1 (en) * 1998-12-23 2001-09-25 Qualcomm. Inc. Method and apparatus for providing fair access in a group communication system
CA2813536C (en) * 2000-03-03 2015-08-25 Qualcomm Incorporated Method and apparatus for participating in group communication services in an existing communication system

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WO1998025423A1 (en) * 1996-12-02 1998-06-11 Nokia Telecommunications Oy Maintenance of group call in mobile communication system

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