DE102004005719A1 - A method of controlling the communication flow within a group of communication units and a network component, a transmission unit authorized to transmit, a communication unit authorized to receive, and a network component - Google Patents

Abstract

Disclosed is a method for controlling the communication flow within a group of communication units and a network component. In each case, only one communication unit from the group is assigned an exclusive transmission right for a predefinable authorization period for sending at least one user message to the other communication units, during which only a right to receive the sent user messages is assigned to these other communication units of the group. Furthermore, for one or more communication units of the group that are authorized to receive, each of them is ready to process useful messages to be received by the communication units of the group and / or one or more communication units of the group and / or the network component that are authorized to receive communicated. Derived from at least one indicator message for at least one communication unit of the group and / or for the network component at least one control signal for controlling the communication process.

Description

method for controlling the communication process within a group of Communication units and a network component, one for sending authorized communication unit, one authorized to receive Communication unit and a network component

Commercially available two-way radios, the For example, under the name walkie-talkie are known, allow it, voice messages to one or more call participants send in real time. While of speaking while the speaker pressed a special PTT key. Thereby He locks other involved participants for speaking. The transfer thus takes place after a half-duplex method. communication services in the manner of the half-duplex method is also referred to as PTT services (PTT "push-to-talk").

The For example, today's PTT services allow transmission of voice messages within a group of multiple participants. It is also possible, that a participant belongs to more than one group. So it is this participant possible, For example, voice messages from a first as well as from a second group, to receive at the same time. It can, however, in practice be difficult to voice messages from two groups at the same time to listen. That's why there is a possibility for example, the subscriber manually selects one of the two groups selects he is currently listening would like to.

The invention has for its object to control the communication flow within a group of communication units and a network component in a simple and efficient manner. This object is achieved by the following method according to the invention:
A method for controlling the communication process within a group of communication units and a network component, wherein only one communication unit from the group is assigned an exclusive transmission right for a predeterminable authorization period for sending at least one message to the other communication units of the group, during which these other communication units Group is assigned only a right to receive the sent messages, wherein for one or more for receiving authorized communication units of the group each with the help of one or more indicator messages their willingness to edit to be received user messages to the authorized to send and / or one or more to Receiving authorized communication units of the group and / or the network component is communicated, and wherein at least one indicator message for at least one communication unit of the group and / or for the network component at least one control signal for controlling the communication flow is derived.

By the inventive method At least one communication unit of the group is allowed to recognize which of the other communication units involved in the group Willingness to process user messages to be received indicating or giving up. In addition, at least one of the Communication units that are willing to edit user messages to be received by the others involved in the group, Communication units knows from this knowledge at least one control signal from. This control signal is used to control the communication process used within the group. For example, one may be for sending authorized communication unit sending user messages, e.g. Voice messages, set as soon as everyone else at the Group involved, communication units their willingness to Abandoned the processing of user messages to be received.

By the inventive method it continues to allow the network component, depending on willingness to process user messages to be received for at least a communication unit involved in the group, a control signal derive. This control signal is used to control the communication process used within the group. For example, the network component deprives due to the control signal of the transmission unit authorized to transmit the exclusive right to send as soon as one of the authorized to receive Communication units their willingness to process from has given up receiving user messages.

Of Further, the control of the communication process will be simple within the group ensures as well as the communication units as well as the network component.

The invention also relates to a transmission unit authorized to transmit for controlling the communication sequence within a group of communication units and a network component, comprising a receiving unit for accepting an exclusive transmission right for a predefinable authorization period for sending at least one message to the other communication units of the group while the latter other communication units of the group can be assigned only a right to receive the sent payload messages, and to accept one or more indicator messages, wherein for one or more communication units of the group which are authorized to receive, their readiness for processing payloads to be received is communicated in each case with the aid of one or more indicator messages, and a control unit for deriving at least one control signal from at least one indicator message for controlling the communication sequence.

Farther The invention also relates to a communication unit authorized for receiving Controlling the communication process within a group of communication units and a network component, with a receiving unit for receiving a right to receive the sent user messages during a predetermined Authorization period while that of a communication unit from the group an exclusive send right to send at least one message to the other Communication units of the group is assignable, and to accept one or more indicator messages, wherein for one or more a plurality of receiving communication units of the group each with the help of one or more indicator messages their Willingness to process user messages to be received is communicated, and with a control unit for deriving at least a control signal from at least one indicator message for Control of the communication process.

Farther The invention also relates to a network component for Controlling the communication process within a group of communication units and the network component, with a receiving unit for receiving one or more indicator messages, with only one Communication unit from the group an exclusive transmission right for a predetermined authorization period to send at least one message to the other Communication units of the group is assigned during the These other communication units of the group only one Right to receive the sent payload messages, being for a or multiple communication units authorized to receive the Each group by means of one or more indicator messages their willingness to process user messages to be received is communicated, and with a control unit for deriving at least a control signal from at least one indicator message for Control of the communication process.

other Further developments of the invention are given in the dependent claims.

The Invention and its developments are described below with reference to Drawings closer explained.

It demonstrate:

1 a schematic representation of a portion of a possible device for carrying out the method according to the invention with a plurality of communication units KE1, KE2, KE3, KE4, a network component PS and with some messages between the network component PS and multiple communication units KE1, KE2, KE3, KE4 and possible extensions,

2 in schematic representation, in each case one possible device of a communication unit KE2 authorized to transmit, a communication unit KE1, KE3 authorized to receive, as well as a network component PS,

• – Das Zustandekommen und Auflösen einer Gruppe G1;
• – Mehrere Variationen zur Signalisierung der Bereitschaft zur Verarbeitung von zu empfangenden Nutznachrichten NN mittels mehrerer Indikatornachrichten IN;
• – Der Versand von einer Nutznachricht NN, und

3 a signal flow diagram of an embodiment of the method according to the invention by the following processes are described:

• The formation and dissolution of a group G1;
• Several variations for signaling the readiness to process useful messages NN to be received by means of a plurality of indicator messages IN;
• - The dispatch of a useful message NN, and

4 a signal flow diagram of another embodiment illustrating the signaling and impact when using multiple user groups BG.

1. Overview of a PTT system

In 1 is a section of a possible PTT system (PTT "push-to-talk") seen .The service of a PTT system is referred to as a PTT service.The PTT service is characterized in that a communication unit, such as KE2, one Group, eg G1, is assigned an exclusive right to send payload messages, eg NN, for an authorization period such as BT During this authorization period BT, the other communication units, such as KE1, KE3, of the group G1 are only granted a right to receive Thus, the transmission is done according to a half-duplex method in the specification "Push-to-Talk over Cellular" (POC), Architecture, Version 1.1.0, POC Release 1.0, under "http: \\ www.ericsson.com \ multiservicenetworks \ distr \ poc specifications.zip "you will find further tasks of a PTT system.

The PTT system of 1 consists of several communication units KE1, KE2, KE3, KE4 and a network component PS. This PTT system is organized in a star shape. In the middle of 1 is the network component PS, for example, a central PTT server, with at least a communication unit KE1, KE2, KE3, KE4 is in communication. The network component PS controls the PTT service and distributes one or more relevant communication messages to the communication units KE1, KE2, KE3, KE4. A communication message comprises either a control message or a message. A control message is a message containing information about the status of the group or the control of the group. One or more control messages may be sent and / or received at any time from one or more communication units and / or network components. Indicated is a message to understand a message that includes user data that sends the authorized to send communication unit to the other participating in the group, for receiving authorized, communication units. These payload data include, for example, voice data and / or image data.

The network component PS according to 2 comprises a transmitting unit SEE0 for sending at least one communication message and a receiving unit EME0 for receiving at least one communication message. Furthermore, it has a control unit STE0 for generating at least one control signal SS for controlling the communication sequence and via a connection network VX0, which is used for exchanging information between the reception unit EME0, the transmission unit SEE0 and the control unit STE0.

The authorized to send communication unit KE2 comprises a transmitting unit SEE2 for sending at least one communication message and a receiving unit EME2 for accepting at least a communication message. Furthermore, it has a control unit STE2 for generating at least one control signal SS for controlling its Communication process, as well as over a connection network VX2, which is used to exchange information between receiving unit EME2, the transmitting unit SEE2 and the control unit STE2 serves.

The for receiving authorized communication unit KE1, KE3, KE4 includes a transmitting unit SEE1 for sending at least one communication message and a receiving unit EME1 for accepting at least a communication message. Furthermore, it has a control unit STE1 for generating at least one control signal SS for controlling its communication sequence, as well as over a connection network VX1, which is used to exchange information between Receiving unit EME1, the transmitting unit SEE1 and the control unit STE1 serves.

A or more communication units KE1, KE2, KE3, KE4, can in a mobile device according to the GSM standard (GSM - Global System for Mobile) or the UMTS standard (UMTS - Universal Mobile Telecommunications System) be integrated. Alternatively, they can be used in a landline after the ISDN standard (ISDN - Integrated Subscriber Digital Network) or even in a computer unit, for example to a public Internet and / or intranet connected to be implemented.

1.1 groups in a PTT service

• a) "Dial-Out"-Variante Bei dieser Variante wird eine Gruppe mit bestimmten Kommunikationseinheiten vorab definiert. Diese Gruppe bekommt eine eigene Gruppen-Adresse zugewiesen. Eine Kommunikationseinheit dieser Gruppe kann mit Hilfe dieser Gruppen-Adresse alle anderen zu dieser Gruppe zugehörigen Kommunikationseinheiten zur Teilnahme an einer Kommunikation einladen.
• b) "Dial-In"-Variante Bei dieser Variante ist es hingegen so, dass die zu einer Gruppe zugehörigen Kommunikationseinheiten nicht unbedingt vorab ausgewählt werden, sondern, dass jeweils eine oder mehrere Kommunikationseinheiten sich selbstständig an dieser Gruppe anmelden. In der Praxis kann dies durch das Anwählen einer bestimmten Telefonnummer oder IP-Adresse (IP – Internet Protocol) geschehen. So ist es in der Praxis möglich, dass eine öffentliche Gruppe besteht, zu der sich eine oder mehrere Kommunikationseinheiten KE1, KE2, KE3 jederzeit anmelden und/oder abmelden können.

The PTT service combines several communication units in one or more groups. In this case, the communication units combined in the respective group can exchange one or more communication messages. In the embodiment according to 1 the communication units KE1, KE2, KE3 are grouped in the group G1 and the communication units KE3, KE4 in the group G2. The group G1, G2 can be constructed, for example, by means of the following two variants.

• a) "Dial-out" variant In this variant, a group with specific communication units is defined in advance. This group is assigned its own group address. A communication unit of this group can use this group address to invite all other communication units belonging to this group to participate in a communication.
• b) "Dial-In" Variant In this variant, however, it is the case that the communication units belonging to a group are not necessarily selected in advance, but rather that one or more communication units autonomously log on to this group. In practice, this can be done by dialing a specific telephone number or IP address (IP - Internet Protocol). Thus, it is possible in practice that there is a public group to which one or more communication units KE1, KE2, KE3 can log on and / or log off at any time.

One or more communication units may simultaneously participate in communication in two or more groups. In 1 For example, the communication unit KE3 is both participant of group G1 and group G2. For this case, it can be determined, in particular by the network component PS, whether the communication unit KE3 receives one or more user messages NN from group G1 and / or from group G2 at a specific time. For this purpose, the network component PS the Nutznachrichtenverkehr both groups G1, G2 obob respect, think highly of. Depending on in which group G1, G2 user messages NN are sent, this specifies the readiness for processing user messages NN to be received for the communication unit KE3 for the respective group G1, G2. Accordingly, network component PS the user messages NN directly to them further. This method is also called "scanning". Alternatively, it may also be expedient in practice for the communication unit KE3 to manually select that group G1, G2 from which it currently wishes to receive user messages NN. In a further alternative, the network component PS can make the decision to transmit user messages NN from the respective group G1, G2 with the respectively higher priority to the communication unit KE3 when user messages NN of both groups G1, G2 simultaneously occur.

2nd embodiment

• – „NOTIFY (KE3, Y)": die Kommunikationseinheit KE3 ist zur Bearbeitung von zu empfangenden Nutznachrichten NN bereit. Dies wird als positive Bereitschaft bezeichnet.
• – „NOTIFY (KE1, N)": die Kommunikationseinheit KE1 hat ihre Bereitschaft zur Bearbeitung von empfangenen Nutznachrichten NN aufgegeben. Dies wird als negative Bereitschaft bezeichnet.

In an embodiment according to 3 the sequence of a PTT service for the group G1 is described in more detail with the communication units K1, KE2, KE3. In this case, the "dial-out" variant is used for establishing the communication.The network component PS is referred to below as PTT server PS One or more control messages are used to signal the readiness to process user messages NN to be received Hereinafter referred to as indicator messages IN to distinguish a plurality of indicator messages IN, these are indexed, for example, a first indicator message IN 1. An indicator message according to the specification "Push-to-Talk over Cellular" (POC) by extending a message with a In this case, this message comprises, on the one hand, the respective communication unit KE1, KE2, KE3 to which readiness relates, and, on the other hand, by means of a readiness indicator, it indicates whether the readiness is present or is given up represented by the symbols "Y" and "N". The following syntax is preferably used here:

• "NOTIFY (KE3, Y)": the communication unit KE3 is ready to process payload messages NN to be received, which is referred to as positive readiness.
• "NOTIFY (KE1, N)": the communication unit KE1 has given up its readiness to process received user messages NN, which is referred to as negative readiness.

2.1 Structure of a group

With initiated a first invitation message EN1 to the PTT server PS the communication unit KE1 the structure of the group G1 for the purpose of the message exchange. This group is supposed to be the communication units KE1, KE2 and KE3 include. Therefore, the PTT server sends PS a second invitation message EN2 to the communication unit KE2 and a third invitation message EN3 to the communication unit KE 3. Thereupon confirmed with a first attendance confirmation message TBN1 the communication unit KE3 their participation in the group G1. Subsequently, the PTT server informs PS by means of a first confirmation message BN1, the communication unit KE1 that the desired group G1 with at least another communication unit has come about. After that the PTT server PS informs the communication unit KE1 by means of a first indicator message IN1 that the communication unit KE3 now participates in the G1 group and has a positive readiness having. In the next Step confirmed the communication unit KE2 their participation in the group G1 means a second attendance confirmation message TBN2. In the following, the PTT server PS informs the communication unit KE1 by means of a second indicator message IN2, that now too the communication unit KE2 has entered the group G1 and has a positive readiness. After that, the communication unit KE2 by the PTT server PS by means of a third indicator message IN3 over the participation of the communication units KE1 and KE3 in the group Informed G1 and their respective positive readiness. alternative may instead of a third indicator message IN3 also two individual Indicator messages are sent. It is, however, in practice especially useful, several individual indicator messages IN, which are sent to a single communication unit are directed to summarize into a single indicator message. This allows bandwidth for the transmission be saved. The PTT server PS below teaches the third Communication unit KE3 by means of a fourth indicator message IN4 over the participation of the communication units KE1 and KE2 in the group G1 and their respective positive readiness.

2.2 Request for a exclusive broadcasting rights

After the group G1 has come from the communication units KE1, KE2, KE3 states, the communication unit KE2 requests an exclusive transmission right from the PTT server PS by means of a transmission request message SAN. The PTT server PS thereupon issues the exclusive transmission right by means of a transmission confirmation message SBN. From this point in time, the communication unit KE2 has the exclusive right to send one or more user messages NN for an authorization period BT, during which the other comm communication units KE1, KE3 have only the right to receive one or more user messages NN.

2.3 Changes willingness to process user messages

in the Following is the positive readiness by the PTT server PS the communication unit KE3 replaced by a negative readiness. The communication unit KE3 is, for example, in two groups G1, G2 logged in parallel. The PTT server PS may preferably by "scanning" the communication traffic of group G1 and group G2 have detected that in group G2 user messages NN to be processed by the communication unit KE3 are. Therefore, the PTT server PS of the communication unit KE3 becomes the group G1 assign a negative readiness and can then this communication unit KE3 for group Assign a positive readiness to G2. To display the negative Readiness for Communication unit KE3 sends the PTT server PS of the communication unit KE1, KE2 and KE3 each a fifth or sixth or seventh indicator message IN5, IN6, IN7.

When next gives the communication unit KE1 their willingness to process of user messages NN on. For this purpose, it sends to the PTT server PS an eighth indicator message IN8 to display their negative Standby. This passes this information to the communication units KE2 and KE3 in the form of ninth and tenth indicator message IN9, respectively, IN10 continues.

In In a further step, the communication unit KE1 becomes its negative Suspend readiness. This tells the PTT server PS by means of an eleventh indicator message IN11 with. This then sends the current positive readiness from communication unit KE1 to the other communication units KE2 and KE3 by means of a twelfth or thirteenth indicator message IN12, IN13.

2.4. Sending a message

in the Further sends the authorized to send communication unit KE2 a useful message NN to the authorized to receive communication units KE1, KE3. For this purpose, the useful message NN first to the PTT server PS transmitted, which redistributes them to the other communication units KE1, KE3. In this embodiment the communication unit KE3 has indicated its negative readiness. From this, the PTT server can generate a control signal SS that this only those for receiving authorized communication units KE1, KE3 of the group G1 forwards the useful message NN, which is a have indicated positive readiness. Therefore, the PTT server forwards PS the useful message NN only to the communication unit KE1 on.

2.5 Termination of the group

Finally there the communication unit KE2 its exclusive right to send of user messages NN on. For this purpose, she sends a send completion message SEN to the PTT server PS. This deprives her of the exclusive right to send and confirms this by an end acknowledgment message EBN.

To the Finally, the communication device KE1 terminates its participation in the Group G1 with the first end message CN1. The PTT server will then terminate the group G1 by sending a second and third end message CN2, CN3 to the respective Communication unit KE2 or KE3. These confirm by their respective second or third confirmation end message CBN2, CBN3 their exit from the group G1. Finally shows the PTT server PS of the communication unit KE1 the end of the group G1 by sending a first confirmation end message CBN1 on.

3. Control of the communication process by means of a control signal

According to one potential Continuing education will be one or more received or sent Indicator messages of a communication unit for formation respectively at least one control signal SS used for this communication device.

This is accomplished by the respective control unit, eg STE1, STE2. This control signal SS causes, for example, in 1 the communication unit KE2 for outputting a text on a connected display DSY. For example, the following text is output:
"Participants in group 1: KE1, KE2, KE3
Participants listening: KE1 "

in this connection contains the first line is an indication of those communication units, currently registered in group G1, e.g. communication unit KE1, KE2, KE3. The second line gives those communication units who are currently listening to communication within group G1, ie have signaled a positive readiness, for example, communication unit KE 1.

Furthermore, it may be expedient for a transmission unit entitled to transmit on the basis of the control signal SS to attach the content of at least one user message to those communication units authorized to receive fit, who have signaled their positive readiness. For example, only the communication device KE1 has signaled its positive readiness. Thus, the authorized to send communication unit KE2 send only useful messages NN, which are of particular interest to the communication unit KE1.

In In another variant, a communication unit authorized to send can be used stop the sending of user messages as soon as certain and / or also all communication units entitled to receive their have communicated negative readiness.

In In an advantageous embodiment, one or more indicator messages for generating a control signal SS for the network component PS used. So there is the possibility only those for receiving authorized communication units forward one or more payload messages that are positive Have readiness. Furthermore, the network component PS reject a request to assign an exclusive broadcasting right, if all communication units of the respective group G1 their have shown negative readiness. Also, the network unit PS decide the currently authorized to send communication unit to withdraw their exclusive right to send, if all to receive authorized communication units of the respective group their have made negative readiness.

4. Activation signal

• – Erteilung eines exklusiven Senderechts oder Aufgabe eines exklusiven Senderechts;
• – Aufnahme einer neuen Kommunikationseinheit in eine jeweilige Gruppe;
• – Ausscheiden einer Kommunikationseinheit aus einer jeweiligen Gruppe;
• – Änderung der Bereitschaft zum Verarbeiten von zu empfangenden Nutznachrichten mindestens einer Kommunikationseinheit der Gruppe.

In the embodiment according to 3 the respective indicator message IN is always forwarded to all communication units KE1, KE2, KE3 participating in the group G1 at the time at which a change in the readiness for processing at least one user message NN for one of the communication units KE1, KE2, KE3 occurs. In addition, there is also the possibility that, on the basis of an activation signal AS, the current positive or negative readiness of one or more communication units is sent to one or more communication units by means of at least one indicator message IN by the PTT server PS. In particular, this current positive or negative readiness may be of interest in at least one of the following states of the communication process:

• - granting an exclusive broadcasting right or giving up exclusive broadcasting rights;
• - inclusion of a new communication unit in a respective group;
• - leaving a communication unit from a respective group;
• - Change of readiness for processing to be received user messages of at least one communication unit of the group.

at Occurrence of at least one of said states generates the activation signal AS and communicated to the PTT server PS. possibly is the activation signal AS within the control unit ST0 of the PTT servers PS generated. Upon receipt of the activation signal AS sends the PTT server PS one or more indicator messages to at least one communication unit. This indicator message includes the current positive or negative Readiness of at least one communication unit of the respective one Group.

6th observation group

In In practice, it may also be advantageous for at least one communication unit Within a group, an associated observation group BG set. This observation group BG gives all those communication units on, over their current positive or negative willingness the associated communication unit should be informed. It is expedient in each case a specific Observation group BG1, BG2 and BG3 for each communication unit KE1 or KE2 or KE3 to define.

6.1 embodiment with several observation groups

• – BG=" „: eine Beobachtungsgruppe enthält keine zu beobachtenden Kommunikationseinheit. Somit werden keine Informationen zur Bereitschaft zum Verarbeiten von zu empfangenden Nutznachrichten an die jeweilige Kommunikationseinheit verschickt.
• – BG="KE2, KE3": Hierbei werden eine oder mehrere Indikatornachrichten mit Angabe der Bereitschaft zum Verarbeiten von zu empfangenden Nutznachrichten, die die aufgelisteten Kommunikationseinheiten, z.B. Kommunikationseinheit KE2, KE3, betreffen, an die jeweilige Kommunikationseinheit, z.B. Kommunikationseinheit KE1, KE2, KE3, verschickt.

In a possible embodiment according to 4 In each case, an observation group is defined by the respective communication unit KE1, KE2, KE3 and transmitted to the network component PS. There they are used to generate a control signal SS in the control unit STE0. Thus, the communication sequence is then controlled by means of the control signal SS. In 4 the network component PS is again referred to as PTT server PS. The embodiment in 4 is a possible extension of the embodiment of 3 and focuses mainly on the use of multiple observation groups. The respective observation group is preferably transmitted by means of an invitation message, for example by the first invitation message EN1, and / or by means of an invitation confirmation message, for example by the first invitation confirmation message TBN1 and / or by means of a description message, eg the descriptive message SCN. A unique index is used to identify an observation group for an associated communication unit. For example, a first observation group BG1 is assigned to the communication unit KE1. In this case, the following syntax can preferably be used in a message for signaling an observation group:

• BG = "": an observation group contains no communication unit to be observed. Thus, no information about the readiness to process user messages to be received is sent to the respective communication unit.
• - BG = "KE2, KE3": In this case, one or more indicator messages indicating the readiness for processing of user messages to be received, which relate to the listed communication units, eg communication unit KE2, KE3, to the respective communication unit, eg communication unit KE1, KE2, KE3, sent.

With a first invitation message EN1 initiates the communication unit KE1 the formation of the group G1 on the PTT server PS. there the communication unit KE1 integrates its first observation group BG1 in its first invitation message EN1, this first observation group BG1 contains only the communication unit KE2. Then the PTT server sends PS the second and third invitation message EN2, EN3 to the respective Communication units KE2 or KE3. The communication unit KE3 confirmed their participation in group G1 with their first invitation confirmation message TBN1. She integrates in this message her third observation group BG3, which is empty. This signals that no indicator messages IN to be sent to you.

To Receipt of the first invitation confirmation message TBN1 is sent to the communication unit KE1 by means of the first acknowledgment message BN1 the occurrence of group G1 is displayed. As the communication unit KE1 has indicated by means of its first observation group BG1 that sent to them only indicator messages to be, which concern the communication unit KE2 is the communication unit KE1 the positive readiness of communication unit KE3 not displayed.

in the next Step receives the PTT server PS from the communication unit KE2 the second attendance confirmation message TBN2, which also includes the second observation group BG2.

These second observation group BG2 instructs the PTT server PS that Indicator messages IN, the information about the communication units KE1 and KE3 included, forwarded to the communication unit KE2 should be. Then the communication unit KE1 is using the second indicator message IN2 about the positive readiness of Communication unit KE2 taught. In the following, the communication unit KE2 over the positive readiness of the two communication units KE1, KE3 informed by means of the third indicator message IN3.

In In a further step, the communication unit KE3 signals their negative readiness by means of a thirteenth indicator message IN13. This information is provided by the PTT server PS only to the communication unit KE2 by means of a fourteenth Indicator message N14 forwarded, since all other communication units KE1, KE3 the transmission of indicator messages concerning the communication unit KE3, have excluded.

When Further shares the communication unit KE1, by means of a description message SCN with their first observation group BG1. Thus, the existing overwritten first observation group BG1 in the PTT server PS. From now on Indica tornachrichten, the communication units KE2 and KE3 relate to the communication unit KE1 delivered. The PTT server PS acknowledged this message with a description acknowledgment message SON.

When next the communication unit KE3 shows its positive readiness by means of a fifteenth Indicator message IN15 the PTT server PS. This information is immediately using the sixteenth and seventeenth indicator message IN16, IN17 to the respective communication unit KE1 or KE2 forwarded. Since the communication unit KE1 previously in their first observation group BG1 has informed that from now on also indicator news of the Communication unit KE3 are to be sent to them, it receives now also this information.

• – Einladungsnachricht EN mit einem Namen „INVITE",
• – Einladungsbestätigungsnachricht TBN mit einem Namen „OK" oder
• – Beschreibungsnachricht SCN mit einem Namen „SUBSCRIBE".

In the "Push to Talk over Cellular" (POC) specification, the signaling of one or more observation groups can be realized by extending one or more messages with the following names:

• Invitation message EN with a name "INVITE",
• Invitation confirmation message TBN with a name "OK" or
• Description message SCN with a name "SUBSCRIBE".

6.3 Further education at Use of an observation group

In an expedient variant, the network component PS can control the transmission unit authorized for transmission from at least one control signal which is obtained from at least one observation group. For example, all the communication units to be observed KE1, KE3 of the second observation group BG2 their willingness to edit to be received user data NN, on. Since now none of the observed communication units KE1, KE3 of the second observation group BG2 to be processed user data NN to be received, the authorized to send communication unit KE2 their exclusive transmission right is withdrawn. Furthermore, it may also be expedient to indicate the negative readiness of all communication units KE1, KE3 contained in the second observation group BG2 by means of a new indicator message INN of the communication unit KE2.

In In practice, it may be additional be beneficial that one or more observation groups through the network component PS are created. This is for example prevents a particular communication unit from being over current positive or negative readiness of another communication unit is informed. Thus, a communication unit can update its current positive or negative willingness to process to be received User messages in front of one or more other communication units disguise.

According to one additional Further development, it may also be expedient that in each case a communication unit their respective observation group with at least one received and / or sent indicator message. This can by means of the respective control unit, e.g. Control unit STE1 for communication unit KE1, to be achieved. This particular control unit generates a associated Control signal indicating the communication sequence of the respective communication unit controls. By way of example, the first observation group comprises BG1 the communication unit KE1, the communication units to be observed KE2, KE3. In the following, these watch communication units KE2, KE3 their negative readiness by means of several indicator messages With. The control unit STE1 of the communication unit KE1 analyzes then the received indicator messages and the first observation group BG1. Since all observed communication units KE2, KE3 their displayed negative readiness, generates this control unit STE1 a control signal SS. This control signal SS causes the Communication unit KE1 to send another indicator message, in which she shows her negative readiness. At a later time can the communication unit KE1, after one of the observed Communication units KE2, KE3 the first observation group BG1 signaled their positive readiness, their own willingness change into a positive readiness.

Claims (16)

Method for controlling the communication process within a group (G1) of communication units (KE1, KE2, KE3) and a network component (PS), only one each a communication unit (KE2) from the group (G1) an exclusive Send permission for a predefinable authorization period (BT) for sending at least a useful message (NN) to the other communication units (KE1, KE3) is assigned to the group (G1) while the other these communication units (KE1, KE3) of the group (G1) only have a right to receive the assigned to sent payloads (NN), where for one or a plurality of communication units (KE1, KE3) of the group (G1) each with the help of one or more indicator messages (IN) their willingness to process user messages to be received (NN) to the authorized to send and / or one or more to Receive authorized communication units (KE1, KE2, KE3) the Group (G1) and / or the network component (PS), and wherein at least one indicator message (IN) for at least a communication unit (KE1, KE2, KE3) of the group (G1) and / or for the network component (PS) derived at least one control signal (SS) for controlling the communication sequence becomes. Method according to claim 1, characterized in that that the respective communication unit (KE1, KE2, KE3) of the group (G1) in a mobile device, in a landline device or used in a computer unit. Method according to one of the preceding claims, characterized characterized in that one or more indicator messages (IN) one or more communication units authorized to receive (KE1, KE3) of the group (G1) sent to the network component (PS) and these indicator messages (IN) through the network component (PS) to one or more communication units (KE1, KE2, KE3) the group (G1) are forwarded. Method according to one of the preceding claims, characterized marked that for one or more communication units (KE1, KE2, KE3) of the group (G1) an observation group (BG) is determined in each case one or more communication units to be observed (KE1, KE2, KE3) of the group (G1). A method according to claim 4, characterized in that of the respective communication unit (KE1, KE2, KE3) their respective Obobach group (BG). Method according to claim 5, characterized in that that of the respective communication unit (KE1, KE2, KE3) their respective observation group (BG) by means of at least one of the following Messages to the network component (PS) is transmitted: - means their invitation message (EN) containing the respective communication unit (KE1, KE2, KE3) for establishing the group (G1) for the purpose of message exchange, or by means of their Invitation Confirmation Message (TBN), the the respective communication unit (KE1, KE2, KE3) for registration sent to the group (G1), - By means of their description message (SCN), which the respective communication unit (KE1, KE2, KE3) during the Existence of the group (G1) sent. Method according to one of claims 4 to 6, characterized in that from the network component (PS) the respective observation group (BG) for the associated Communication unit (KE1, KE2, KE3) is redefined. Method according to at least one of claims 4 with 7, characterized in that of the network component (PS) only the respective communication unit (KE1, KE2, KE3) of the group (G1) one or more indicator messages (IN) containing one or more several observable, receiving units of communication (KE1, KE3) from the respective observation group (BG), forwarded become. Method according to at least one of claims 4 with 8, characterized in that the communication unit (KE1, KE2, KE3) of the group (G1) at least one special indicator message (IN) is sent by the network component (PS) as soon as all communication units to be observed, which are authorized to receive (KE1, KE3) of the associated Observation Group (BG) their respective willingness to process of received user messages (NN). Method according to at least one of claims 4 with 9, characterized in that the authorized to send communication unit (KE2) the group (G1) through the network component (PS) the right to Sending of at least one message (NN) is withdrawn as soon as all communication units to be observed, which are authorized to receive (KE1, KE3) of the associated Observation Group (BG) their respective willingness to process of received user messages (NN). Method according to one of the preceding claims, characterized characterized in that one or more indicator messages (IN) by the network component (PS) upon receipt of an enable signal (KS) to one or more communication units (KE1, KE2, KE3) of the group (G1). Method according to claim 11, characterized in that that the activation signal (KS) due to at least one of the following conditions the communication process is generated: - Issue of the exclusive Right to send or abandon exclusive broadcasting rights, - Modification readiness to process payload data (NN) to be received at least one communication unit authorized to receive (KE1, KE3) of the group (G1), - Recording a new communication unit (KE1, KE2, KE3) into the group (G1), - Leaving one so far involved communication unit (KE1, KE2, KE3) from the group (G1). Method according to one of the preceding claims, characterized characterized in that a plurality of indicator messages (IN) in a new Indicator message (IN), all summarized Indicator messages (IN) either for a specific communication unit (KE1, KE2, KE3) of the group (G1) or for the network component (PS) are determined. Authorized communication unit (KE2) for sending for controlling the communication process within a group (G1) of communication units (KE1, KE2, KE3) and a network component (PS) in particular according to at least one of the preceding claims, With a receiving unit (EME2) for accepting an exclusive one Broadcasting for a predefinable authorization period (BT) for sending at least a useful message (NN) to the other communication units (KE1, KE3) of group (G1) while the other communication units (KE1, KE3) of the group (G1) only a right to receive the sent user messages (NN) and to accept one or more indicator messages (IN), where for one or more communication units authorized to receive (KE1, KE3) of the group (G1) each with the help of one or more Indicator messages (IN) their willingness to process is notified to receiving user messages (NN), and with a control unit (STE2) for deriving at least one control signal (SS) from at least one indicator message (IN) for control the communication process. For receiving authorized communication unit (KE1, KE3) for controlling the communication flow within a group (G1) of Communication units (KE1, KE2, KE3) and a network component (PS) in particular according to at least one of Claims 1 to 13, with a receiving unit (EME1) for accepting a right to receive the sent user messages (NN) during a predefinable authorization period (BT), while a communication unit (KE2) from the group (G1) is assignable an exclusive transmission right to send at least one user message (NN) to the other communication units (KE1, KE3) of the group (G1), and to accept one or more indicator messages ( IN), wherein for one or more for receiving authorized communication units (KE1, KE3) of the group (G1) each with the help of one or more indicator messages (IN) their readiness for processing to be received user messages (NN) is communicated, and with a control unit (STE1) for deriving at least one control signal (SS) from at least one indicator message (IN) for control the communication process. Network component (PS) for controlling the communication process within a group (G1) of communication units (KE1, KE2, KE3) and the network component (PS) in particular after at least one of the claims 1 to 13, with a receiving unit (EME0) for receiving one or more indicator messages (IN), with only one Communication unit (KE2) from the group (G1) an exclusive transmission right for one predefinable authorization period (BT) for sending at least a useful message (NN) to the other communication units (KE1, KE3) is assigned to the group (G1) while the other these communication units (KE1, KE3) of the group (G1) only have a right to receive the is assigned to sent payloads (NN), where for one or a plurality of communication units (KE1, KE3) of the group (G1) each with the help of one or more indicator messages (IN) their willingness to process user messages to be received (NN), and with a control unit (STE0) for Deriving at least one control signal (SS) from at least one Indicator message (IN) for controlling the communication process.