Communication method, communication terminal, supervisor terminal and related computer programmes.

(54) Title: COMMUNICATION PROCEDURE, COMMUNICATION TERMINAL, SUPERVISION TERMINAL AND ASSOCIATED COMPUTER PROGRAMS.

(54) Title: COMMUNICATION METHOD, COMMUNICATION TERMINAL, SUPERVISOR TERMINAL AND RELATED COMPUTER PROGRAMMES.

(57) Summary

Communication procedure, a communication link that is allocated by a resource management module according to a first characteristic value of debit, latency or instability required to provide a first service on the first link between a first (10) and second communication terminal (10), which includes the following stages: - issuing a request to replace the first communication service with a second communication service between at least the first and second terminals; - after receipt of the request by the network resource management module, replacement with the resource management module of the first value of the feature by a second value required to provide the second service; providing the second communication service instead of the first communication service between the first and second terminals via the communication link.

(57) Abstract

A communication method in a Communications network is provided. The method ineludes, in a Communications network in which a communication link has been communication link having been al located by a resource manager module in accordance with a first value of a characteristic of data rate, lateney or jitter required for providing a first Service on the said link between a first and a second communication terminal, the steps of transmitting a request to replace the said first communication Service by a second communication Service between at least the first and second terminaáis; further to receipt of the said request by the resource manager module of the network, replacing by the said resource manager module of the first value of the said characteristic by a second value required for providing the said second Service; and providing the second communication Service instead of the first communication Service between the first and second you end on the said communication link.

Yes

Institute

Mexican Property

Industrial i

M

P

I

PATENT TITLE NO. 339839

Owner (s): THALES

Home: ^{Four. Five ru}e de Villiers, 92200, Neuilly Sur Seine, FRANCE

Name: COMMUNICATION PROCEDURE, COMMUNICATION TERMINAL, SUPERVISION TERMINAL AND ASSOCIATED COMPUTER PROGRAMS

Classification:

Inventor (s):

lnt.CI.8: H04N7 / 14; H04W4 / 10; H04W76 / 04: H04W76 / 06

STÉPHANE ROUSSEAU; GUILLAUME KLECH; CHRISTOPHE MATHIEU

SOLIBILITY

Núi

MX / a / 2013 / 0153jB6

Country:

FR ia: Twenty years of expiration is granted with

Date of presentation:

December 2013

PRIORITY

Date:

December 2012

H

02

Number:

03527

Validity: Twenty Date of Come

Ι.α ρα efllti Uc icISitiiluid

In accordance with article 23 of cornada from the coot ee presentí

Whoever gives rise to this title has made it Industual Property (Official Gazette of .1 ¡ón

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ndamenl ey of the of the

Regulations of the Institute with fund me and Federation of 2033

1 '2nd fraction V, 6th fraction III, and 59 of the Industrial Property Law.

Togables, the present patent has a validity of twenty years impij subject to the payment of the fee to keep the rights in force

01 / 26.2004 16Ό6 / 2005, 01/25/2006, 0 05 / 2009.06 / 01/2010, subsection a), 4 'and 1?^c fractions I and lll c 0 »7/2002, 15/07/2004, 28117/2004 and dát Instituto Ute / ócaned» taápropiedad arranged,. by articles 6 fractions lll and 7 ° bis 2 of Id re-ordered on 02 / 08/1994. 10/25/1996, 12/26/1997, 28/00/2010, 01/27/2012 and 04/09/2012), articles 1, 3f of the Industrial Property (DOF 12/14/1999, ra 09/2007); Articles 1, 3, 4, 5, section V inoso a), 16 sections I and lll and 30 of the Statute and Law of f / 05/1999. Fraction V signed the Organic I7); 1, 3 and 5 Clause a) of the Agreement that delegates powers to the Deputy Directors General, Coordinator, Divisional Directors, Holders of the Regional Offices, Divisional Deputy Directors, Departmental Coordinators and other subordinates of the Mexican Institute of Industrial Property. (DOF 12/15/1999, amended on 02/04/2000, 07/29/2004, 08/04/2004 and 09/13/2007).

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Arena: No. 550. Floor 1 Coi. Pueblo Sama María Tspepan Xochirndco. CP 1S020. Mexico City TS). (55) 53 34 07 00 v

Issue Date: June 14, 2016

THE DIVISIONAL DIRECTOR OF PATENTS

NAHANNY CANAL REYES

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MX / 201S / 46699

3 ^ 633 £ οβ / iS ~ 2f &amp; 6

IMPI

COMMUNICATION PROCEDURE,

INDUSTRIAL

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COMMUNICATIONS, SUPERVISION TERMINAL AND

ASSOCIATED COMPUTER PROGRAMS

Field of the Invention

The present invention relates to a communication method in a communication network, a communication link that has been assigned by a resource management module according to a series of characteristics required to provide a first service on the link and that has been established between at least a first communication terminal of the communication network. The group of characteristics required to provide the first service on the first link comprises a first value of at least one speed and / or latency and / or jitter characteristic.

Background of the Invention

For example, in the LTD network (Long T rm Evolution - Long term evolution), a resource management module, named PCRD node (Pollcy and Charging Rules Function. Collection Policy and Rules Function). ”) Allows to assign the necessary communication resources to provide a required service.

A certain number of communication services require communication resources with different characteristics.

Thus, the alternate two-way communications of the

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MEXICAN INSTITUTE OE THE PROPERTY

INDUSTRIAL

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voice type, also semi-duplex voice calls or Push-To-Talk (PTT), alternating two-way voice and video communications ”(including real-time transmission of voice to the same video as time), also known as Seml5 duplex video and voice "or Push-to-Video, simultaneous two-way" voice "communications also called full-duplex video voice, simultaneous two-way voice and video communications" (including real-time voice transmission, at the same time as video), also called "full duplex" of voice and video "require resources with characteristics that are different in terms of speed and / or latency and / or communication fluctuation.

US document 7526306 describes for example PTT type communications.

US document 2006/0114314 describes semi-duplex "voice and video" communications.

US document 2006/0172754 describes full duplex communications in a PMR (Private Moblle Radlocommunication - Private Mobile Radio Communication)

In LTE networks, after a request for a first service, for example a PTT service between two user terminals A and B, an exchange through a PCRF interface between an application server that monitors the first service and the PCRF node, gives rise to the allocation by the PCRF node of a resource for communication between

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you rminales user A and B, having the characteristics, including speed and / or latency is required for first service.

This interface, called Rx, is defined in version 9 of the ETSI 3GPP standard related to LTE technology.

When one of the user terminals A and B requires a second service, for example of the push-to-video type, it must delimit the first service, which releases the corresponding resource. It then makes a request for the provision of the second service. A change, via the Rx interface between the second service monitoring application server, results in the allocation of a communication resource between user terminals A and B, with characteristics including speed and / or latency and / or fluctuation necessary for the second service.

Brief Description of the Invention

According to a first aspect, the invention provides a communication method of the type mentioned above, characterized in that it comprises the following steps to provide the first service on the communication link:

- issuing a request to replace the first communication service with a second communication service between at least the first and second terminals;

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MEXICAN INSTITUTE

OF INDUSTRIAL PROPERTY

- after receipt of the request by the network resource management module, replacement with I resource management module of the first value of the characteristic by a second value required to provide the second service;

and having another step of providing the second communication service instead of the first communication service between the first and second terminals via the communication link.

An advantage of the invention is to provide a dynamic change type of communication service type without interrupting ongoing communication between communication terminals. Therefore, while the prior art, it was not possible to add a video broadcast service during a voice call, this is made possible in accordance with the invention.

In the embodiments, the method according to the invention further comprises one or more of the following:

- first and second communication services that include the different services between the alternate or simultaneous bidirectional communication services, such as voice calls or video calls,

- the procedure comprises during the provision of the first service to the communication link, a detection step, by a terminal between the first terminal to the

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MEXICAN INSTITUTE Ot THE INDUSTRIAL PROPERTY

<img file="MX339839B_D0008.tif" />

second terminal, the selection, by a terminal user of the second service from the group of second service (s) other than the first service, the stage of issuance of the request made by the terminal according to the detection stage;

- the method comprises a display step, to provide the first service on the communication link, on a screen of at least one terminal between the first and the second terminal, of a sub-menu of the operating menu of the first service commonly provided , the sub-menu lists a group of second service (s) distinct from the first commonly provided service comprising at least the second communication service and including a detect step, by the terminal of the selection, by a user of the terminal, of the second service of the group of second (s) service (s) different from the first service, the stage of issuance of the request is performed by the terminal in function of the detection stage,

- the method comprises a display step, during the provision of the first service over the communication link, on a display screen of at least one supervisory terminal distant from the first and the second terminal, a sub-menu of the operating menu relating to the first commonly provided service, the sub-menu lists the group of second (s) service (s) other than the first service

IMPI

MEXICAN INSTITUTE OF. THE PROPERTY

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and it comprises at least the second service of comdWSlK5¡ón * - and comprises a detection stage, piTl the initial supervisory tei, of the selection by a user of the supervisory terminal, of the second service of the group of second service (s) ( s) different from the first service, the step of transmitting the request is performed by the supervisory terminal based on the detection stage,

- the method comprises a step of comparing, with a fixed threshold, the duration of the non-use of a functionality present in the first service and absent in the second service, and according to which the issuance of the request is a function of the step of comparison,

- the communication network comprises an LTE network and the resource manager module is a PCRF node.

According to a second aspect, the present invention provides a user terminal, adapted for the establishment of a communication link between at least one terminal and the other communication terminal in a communication network by a resource management module according to a group of characteristics necessary for the application of a first service and that include a first value of at least one speed and / or latency and / or jitter characteristic, perform the first service on the first communication link;

the terminal is characterized in that it is suitable

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MEXICAN INSTITUTE OE LA RRORIEDAU INDUSTRIAL

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furthermore, after the execution of the first service on the communication link, receive a notification from the network about the replacement of the first communication service with a second communication service between at least the terminal and the other terminal;

and it is suitable for after notification to implement the second communication service with the other terminal, via the modified communication link, instead of the first communication service.

In a third aspect, the present invention provides a supervisory terminal, adapted to perform the establishment of a communication link between at least one communication terminal and another communication terminal in a communication network, assigned by a resource management module according to a group of characteristics necessary for the application of a first service and having a first value of at least one speed and / or latency and / or jitter characteristic and establishing the first service on that communication link, display a supervision menu of the first service established between the terminal and another terminal;

the supervisory terminal is characterized in that it is also suitable for, during the provision of the first service on the communication link, sending a request to replace the first communication service with a

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MEXICAN INSTITUTE »AND THE INDUSTRIAL FMOFIEDAD

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second communication service between at least the communication terminal and the other communication terminal;

and which is suitable for, after the resource manager module replaces the first value of the established communication link characteristic with a second value different from the first value required for the provision of the second service, to display a second service monitoring menu provided between the communication terminal and another communication terminal.

According to a fourth aspect, the present invention provides a computer program for a communication terminal of a communication network s, comprising software instructions, which are implemented in the computing means, performing the following steps, after the establishment of a communication link between at least the terminal and another communication terminal in a communication network and assigned by a resource manager module according to a group of characteristics required for the application of a first service and comprising a first value of at least one speed and / or latency and / or jitter characteristic, performing the first communication link service;

- during the execution of the first communication link service, receiving a notification from the network about the replacement of the communication service by a second one

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⁹ IMPI

MEXICAN INSTITUTE

OF THE PROPERTY

INDUSTRY L communication service between the terminal and at least terminal;

- after notification, execution of the second communication service with the other modified communication terminal, instead of the first communication service.

In accordance with a fifth aspect, the present invention proposes a computer program for a supervisor of a communication network comprising software instructions, which are implemented in computing means, performing the following steps, after the establishment of a communication link between at least one communication terminal and another communication terminal in a communication network, assigned by a resource manager module according to a group of characteristics required for the application of a first service and having a first value of at least one speed and / or latency and / or jitter characteristic and the execution of the first service in the communication link:

- display a supervision menu of the first service implemented between the terminal and the other terminal;

during the performance of the first service on the communication link, it issues a request to replace the first communication service with a second communication service between at least the communication terminal and the other communication terminal;

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Ot LA ΡΚβΡΙΕΟΑΡ industrial _ after the replacement by the resource manager module of the first value of the communication link characteristic established by a second value different from the first value required for the execution of the second service, display a monitoring menu of the second service performed between the communications terminal and another communication terminal.

Brief Description of the Figures

These features and advantages of the invention will become apparent upon reading the following description given solely by way of example and made with reference to the accompanying drawings, in which:

Figure 1 shows a communication network in an embodiment of the invention;

Figure 2 schematically shows the architecture of the network of Figure 1 in one embodiment of the invention;

Figure 3 is a flow chart of the steps carried out in an embodiment of the invention;

Figure 4 is a flow chart of the steps carried out in one embodiment of the invention;

Figure 5 illustrates a change of service in one embodiment of the invention.

Detailed description of the invention

In figure 1, a communication network 1 is represented in an embodiment of the invention, which allows to implement

ΙΜΡΙ

MEXICAN INSTITUTE OE INDUSTRIAL PROPERTY

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Telecommunications between user terminals, for example, accessing the network via radio.

In the case considered, the application of the invention is described with respect to a network 1 of the LTD type.

Referring to Figure 2, the architecture of such a network 1 comprises the following functional elements: the user terminals 10, called "UE (in English User Equipment"), the radio access network 11 "RAN" (in English Radio Access NetWork), the central part of the 12 "CORE" network and the "APPLICATIONS" part 1 3. This architecture is known to the person skilled in the art, as defined in the LTE standards.

Each user mobile terminal 10 is suitable for accessing the RAN by radio. In RAN 11, an eNB ”module (in English eNodeB) is adapted to interact with it via radio with the user terminal 10 when the eNB module is in the radio proximity of terminal 10.

The MME module, on the border between RAN 11 and CORE 12 is adapted to manage the connection of the user terminal 10 to network 1 or and is suitable to communicate with the core HSS module of CORE 12 to verify that a user terminal 10 is well referenced in network 1, and with the S-GW to put into service a communication link (in English Bearer-carrier ”) that implies that user terminal based on this verification.

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MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY

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In CORE 12, the S-GW and P-GW modules are adapted to contribute to the realization of a communication link between the user terminals of the PCRF module is adapted to assign and manage the characteristics of assigned links particularly in terms of minimum speed guaranteed by the link, and / or maximum latency guaranteed by the link.

In the part “APPLICATIONS1 3, an APPS server is adapted to manage access to the user terminals and has at least one communication service.

The blocks located between two modules in Figure 2 and connected to each module by a dotted arrow designate the interfaces between the modules. For example, the Rx interface allows the PCRF and APPS modules to be interconnected.

In an embodiment of the invention, the following steps are performed.

These steps are consecutive to the execution of software instructions corresponding to the terminals or modules concerned in network 1.

Considering the possibility of user A of user terminal 10A wishing to establish a PTT service with user B of user terminal 10B, both user terminals are part of terminals 10 of network 1 and each have a screen and a keyboard 15.

Referring to FIG. 3, in a step 101, the

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MEXICAN INSTITUTE K LA MONEDAD industrial

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user A establishes in a terminal 1 OA the · * 4 · Ηΐη rimAnto of a PTT service with user B.

For example, this command is performed from user A by first pressing a button on terminal 10A that indicates the selection of the PTT service (this button can be a hardware button or be represented on a terminal touch screen) or select help From the terminal 10A keyboard, a menu option displays the total of the proposed communication services comprising for example a PTT service and a PTT video service. After this selection of services, terminal 10A appears on the screen, a list of possible contacts of user A to participate in this PTT service. Terminal A user selects user B from terminal 10B.

In a step 102, user terminal 10A detects this user command. They are then transmitted by network 1, and in particular the eNB to which it is interconnected, to the APPS server in charge of the PTT service, a message, for example, for example, a message of the type "SIP invitation", indicating this PTT service command, the identification from the terminal 1 OA from which it comes, the identification of the terminal from which it comes, the identification of the destination terminal 10B.

In step 103, the APPS server verifies based on the database corresponding to user A that user A

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INSTITUTO MEXICAN OE LA PROPIEDAD

INDUSTRIAL

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It is authorized to demand the provision of the PTT service, also to verify if receiver B can participate in such service.

It is also verified whether the recipient B and / or the user terminal 10B is reachable. It then checks whether recipient B and / or user terminal 10B wants to be the recipient of the required PTT service by user A, by issuing a SIP invitation message "to terminal 10B indicating the PTT service and identifying the 1QA terminal that requires it.

The APPS server determines any special provision related to the PTT service to this user A and / or the terminals 10A, the user has B and / or the user terminal 10B. Then, if the provision of the requested service is authorized and if a positive message is received from the user terminal 10B in response to the SIP invitation message "that was sent to it, the APPS server sends a message through the PCRF module 10 via the Rx interface that requires the provision of a PTT service, the identification of the terminal 1 0A from which it comes, the identification of the recipient's terminal 10B and the eventual features associated with the provision of the PTT service.

If the provision of the requested service is not authorized or a negative message is received from the user terminal 10B in response to the SIP invitation "message that it sent, a message is sent by the APPS server to terminal 10A

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IMPI

ΙΝΠΤΠΓΓΟ MEXICANO DE IA PROPERTY industrial _ indicating to the latter that the requested PTT service cannot be provided and orders the display of a corresponding mention on the screen of terminal 10A.

In step 104, the PCRF module receives the request message sent by the APPS server. He determines whether terminal 10A and / or terminal 10B is authorized to perform this service. Then, if the provision of the requested service is authorized, it authorizes the establishment of the communication link between terminals 10A and 10B to provide the required PTT services. He determines a service quality level of a group that comprises several levels, for example, 5 levels: Q1, Q2, Q3, Q4 and Q5 and corresponding to the required service. The indicated quality of service level is a function of the service required. It is representative of the value, which is defined according to the required service, the maximum link and / or the minimum speed and / or the maximum fluctuation in the link. For example, Q1 corresponds to the PTT service.

The minimum rate of a link is the minimum amount of data (for example, the number of bits, the number of data packets) transmitted per second to the link.

The maximum latency of a link is the maximum delay elapsed between sending data from one end of the link and receiving this data at the other end of the link.

The maximum jitter of a link is the maximum delay

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MEXICAN INSTITUTE OF PROPERTY

INDUSTRIAL

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of reception between two packets issued conclusively.

For example, in the case considered, a minimum speed of 8 kbps (kilobits per second) or a maximum latency of 150 ms (milliseconds) or a minimum jitter of

100 ms.

The PCRF module sends a message to the P-GW module through the Gx interface, requesting the effective execution of the characteristics corresponding to Q1 on a link to be assigned between terminals 10A and 10B.

In a step 105, the P-GW module retransmits this message through the S-GW module, over the S5 / S8 interface ultimately intended for the eNB of terminal 10^to.

After receiving this message, in a step 106, the eNB of terminal 10A, after verification that the radio resources are sufficient, a communication link corresponding to the required Q1 level is established between terminals 10A and 10B .

Thus communication is established in step 107 (not shown) between user terminals 10A and 10B, and the PTT service is then used by terminal users A and B using this communication link, each of which can speak to the other, not simultaneously, for example by pressing a button on the user terminal.

During this communication, during your exchanges n

PTT, a menu of the PTT service exploitation is

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provided by I user of terminal 10A to user A? for example by the display on the screen of the fields you selected by user A.

These fields include, for example, a “END” field to end a communication and allow the link to be released, an “ADDITIONAL RECIPIENT” field to communicate with an additional recipient through the PTT service and a “transition to PUSH-TO” field. VIDEO".

In one embodiment, with reference to Figure 4, the following steps are performed.

In step 201, user A selects the transition field to PUSH-TO-VIDEO ”, for example by pressing I field on the terminal 10A screen with his finger in the case of a touch screen, or using the keyboard. Thus it commands terminal 10A to replace the PTT service with user B for a PUSH-TO-VIDEO service with user B, without interruption in communication.

In a step 202, the user terminal 10A detects this user command. It then transmits through network 1, and in particular the eNB to which it is interconnected with the server in charge of the PUSH-TO-VIDEO service, which is also the APPS server, a message, for example a message of the type "update SIP" indicating this order to replace the PTT service with user B for a PUSH-TOVIDEO service and the identification 1 0A where it comes from.

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In step 203, the APPS server checks '^ umcreñ' for the content of the databases corresponding to user A, that user A is authorized to request the provision of the PUSH-TO-VIDEO service and also checks if recipient B can participate in this type of service.

It also checks if recipient B wants to be the recipient of the PUSH-TO-VIDEO service instead of the PTT service without interruption of communication as required by user A, by issuing a message "Update SIP" to terminal 10B indicating the PUSH-TO-VIDEO service replaces the PTI service without interruption, and also indicating the identification of the 10A terminal that requires it.

The APPS server determines the possible peculiarities associated with the provision of the PUSHTO-VIDEO service that user A and / or terminal 10A has for user B and / or user terminal 10B.

Next, if the provision of the PUSH-TOVIDEO service is authorized and if a positive message is received from the user terminal 10B in response to the "update SIP" message, which was sent to it (user B has accepted the replacement of the PTT service by the PUSH-TO-VIDEO service without communication interruption), the APPS server sends a message to the PCRF module through the Rx interface. This message requires the provision of a PUSH-TO-VIDEO service instead of the PTT service without interrupting communication,

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INSTITUTO MEXICANO cw THE INDUSTRIAL PROPERTY also indicates the identification of the terminal 10A from which it comes, the identification of the destination terminal 10B and the eventual characteristics associated with the provision of the PUSH-TQ-VIDEO service.

If the provision of the PUSH-TO-VIDEO service is not authorized or a negative message is received from the user terminal 10B in response to the SIP update message ”that was sent to it, a message is sent by the APPS server of terminal 10A indicating that the requested PUSH-TO-VIDEO service cannot be provided.

In step 204, the PCRF module receives the request message sent by the APPS server, determines if terminal 10A and / or terminal 10B has been authorized to provide the PUSH-TO-VIDEO service. Then, if the provision of the requested service is authorized, it determines, depending on the message, in particular the service

PUSH-TO-VIDEO specified therein, or the quality service change (s) to be established on the communication link between terminals 10A and 10B to provide a PUSH-TO-VIDEO service instead of the PTT service, in particular in terms of maximum latency and / or minimum speed and / or maximum jitter on the link. The quality level of the service goes from 01 to 02 here.

It then transmits a message to the P-GW module through the Gx interface, requiring effective implementation ^{, NST}njnT) Mexican OE LA «OREDAC 'NDUSTRIAI.

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of the modifications of characteristics (transfer from Q1 to

Q2) of this link made between terminals 10A and 10B.

For example, in the case considered, the modifications are related to the minimum speed value, which is 300 kbps.

In step 205, the P-GW unit retransmits the message through the S-GW module, to the S5 / S8 interface for a final eNB destination of terminal 10A.

After receiving this message, in a step 206, the eNB of terminal 10A, after verifying that the radio resources are sufficient, modifies the characteristics of the communication link between terminal 10A and terminal 10B accordingly. at the required level Q2, especially in terms of speed.

In the alternating bidirectional link thus maintained between user terminals 10A and 10B and whose speed and / or latency and / or jitter characteristics have been adjusted to the PUSH-TO-VIDEO service, in a step 207 (not shown), This PUSH-TO-VIDEO service can then be used by users A and B of these terminals, each one can transmit to the other through this link, photos or videos, in addition to voice data. These photos or videos captured, for example, with an image sensor incorporated in the user terminal or read from the memory of the user terminal.

IMPI ΐΝίτπυτο Mexican industrial property

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For example, the characteristics assigned to the service

PUSH-TO-VIDEO are based on the link between user terminals A and B, the image sensor is activated. In addition, a PUSH-TO-VIDEO service usage menu is displayed instead of the service usage menu PTT appears on the display of the user terminal 10A. This menu presents, for example, a field "END" to end a communication and allow the release of the link, an ADDITIONAL RECIPIENT field''to communicate with an additional recipient through the PTT service, and a field "transition to PTT".

In the configuration shown in Figure 5, terminal 10A and 10B depend on the same eNB.

During steps 107, 201 to 206, the communication link established to perform the PTT service between terminals 10A and 10B has radio resources 20 and 21 (for example each in the form of a dedicated part of a radio channel , for multiplexing time or frequency). Then in step 207 radio resources 22, 23 are added to the communication link between terminals 10A and 10B so that the PUSH-TOVIDEO service can be performed.

Once users A, B have sent photos / videos one or the other can order, in a new stage, the transition to the PTT service without interruption of the communication service,

IMPI

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MEXICAN INSTITUTE Of. INDUSTRIAL PROPERTY in a manner similar to that detailed above.

The invention thus allows to go from one communication service to another without interruption of communication in progress. It is especially possible to add or remove the capture and / or broadcast of photos / videos of a call in a user terminal and adjust the required transmission resources based on these additions and deletions.

The communication in progress is not interrupted: it is not necessary to interrupt the communication, and then renew the call to establish the second service, highlighting the recipient. Users A and B remain connected.

This maintenance of communication can be very important in an emergency situation, especially in the case of PMR radio networks, for example, for the intervention teams of firefighters and police.

This maintenance of communication can be very important when communication resources, such as radio, are infrequent, to adjust the resources according to the real-time needs of the users.

It is not necessary to reestablish the signaling exchange, of the “SIP invitation” type, during which the communication service cannot be provided between A and B.

In the modality described above, this terminal A requires the provision of the PTT service and then change the PTT service to the Push-to-video system. In other

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MEXICAN INSTITUTE OF PROPERTY

INDUSTRIAL

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mode, user B of terminal 10B requires the service change.

In this case, the roles of user B and terminal 10B in the steps shown in Figure 4 are interchanged with those of user A and terminal 10A.

In an embodiment described above, two user terminals are in communication. In other modes, more user terminals communicate through the service. For example, a PTT communication service operated by user A can have 3 different recipients B, C and D. The invention is then implemented to modify the characteristics of the links in relation to the group of recipients by changing service without interrupting the communication.

The invention can be applied to all the successive communication services provided by at least two user terminals without breaking the communication between the two terminals, allowing this service to be provided, with an adaptation of the latency or the speed in the communication link between them.

The two services in question are, for example, any of the types of calls defined in the LTE 3GOO standard: alternate bidirectional communications of the vos type, also semi-duplex or push-to-talk (PTT) calls, bidirectional communications alternate voice type and

IMPI Mexican institute

OF THE «OPIE» AD INDUSTRIAL

<img file="MX339839B_D0027.tif" />

video ”(including real-time voice transmission at the same time as video), also called semi-duplex“ video and voice ”or also Push-To-Video, simultaneous two-way voice-type communications also called duplex -total "voice and video", simultaneous two-way voice and video communications "(including real-time voice transmission, at the same time as video), also known as full-duplex video and voice.

In one embodiment, this service change functionality without breakdown of a communication is proposed to the user, during the provision of that service, in each user terminal or only in certain user terminals, according to the data related to a user or your user.

In an embodiment of the invention, communication between user terminals, including, for example, communication between user terminals 10A, 10B, 10C are supervised by a supervisory terminal.

User C of a supervisory terminal, such as the terminal is a user of higher hierarchy A and B. Thanks to its supervisory terminal 10a, the changes of users A and B can be heard on the link that has been assigned to them. . In one embodiment, user C can control the transition from a first service to a second service between users A and B on the communication link, without

IMPI

MEXICAN INSTITUTE OF INDUSTRIAL PROPERTY

<img file="MX339839B_D0028.tif" />

interruption of communication.

Suppose that the terminals of the users are considered in PTT communication in step 107.

On the screen of the supervisory terminal 10C, especially the communication supervisor and especially for the PTT service currently provided between terminals 10A and 10B, a menu proposes the fields that propose the transitions to one or several different services without interruption of communication in course.

In a step 301, user C selects, on the screen of supervisory terminal C, the transition field to PUSHTO-VIDEO "in relation to ongoing continuous communication between terminals 10A, 10B.

In step 302, supervisory terminal 10C detects this user command. It then transmits through network 1, the server in charge of the PUSH-TO-VIDEO service, which is also the APPS server, a message, for example, a SIP Update type message, ”indicating this command to replace the PTT service between users A and B for a PUSH-TO-VIDEO service, the identification of the supervisory terminal 10C from which it comes.

In step 303, the APPS server verifies based on the content of the databases indicating that user C is authorized to request the replacement of the PTT service by the PUSH-TO-VIDEO service in a communication between

IMPI

MEXICAN INSTITUTE OF INPUSTRIAI PROPERTY

<img file="MX339839B_D0029.tif" />

user terminals 10A, 10B and / or between users, A and T '' ^

The APPS server determines the rid SflS'S particles associated with the provision of the PUSH-TO-VIDEO service to this user A and / or terminal 10A, user B and / or user terminal 10B.

So if it is replaced by a PUSH-TO-VIDEO service when authorized upon request from user terminal C of terminal 10C, the APPS server sends a message through the PCRF module through the Rx interface requesting the provision of a service PUSH-TO-VIDEO replacing the PTT service without communication interruption, the identification of the terminals 10A, 10B and the characteristics associated with the provision of the service

PUSH-TO-VIDEO.

Steps 204-207 described above are implemented below.

If the provision of the PUSH-TO-VIDEO service is not authorized, a message is sent by the APPS server terminal to the terminal 10C indicating that the requested PUSH-TOVIDEO service cannot be provided.

Once the PUSH-TO-VIDEO service is available, a message from the APPS server is sent to terminals 10A, 10B causing the terminal screen to display, a message informing the user that the PUSH-TOVIDEO service is keep on lending.

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IMPI

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OF INDUSTRIAL PROBITY

In addition, it is displayed in the monitoring menu of

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communication between terminals 10A, 10B, transition field to PTT ”.

This field, according to the modalities of the invention, is available or not, in the operating menu of the PUSH-TO-VIDEO service when it is available on the screen of terminal 10A and / or 10B.

In one embodiment of the invention, additional functions are implemented.

For example, a function can analyze the actual use of a connection by the user terminals that communicate on this link, regularly compare this effective use of the characteristics of the requested service, and based on this comparison, suggest on the screen of the minus one of the user terminals, to the terminal user, the transition to another service without communication interruption, the most appropriate to the current profile of the communication (for example, in terms of the type of content, including voice, video or data and / or usage profile).

For example, if a PUSH-TOVIDEO service is implemented, it can be detected that only five of the voice data are transmitted in a time greater than the fixed threshold, and in addition a transition to a PTT service can be suggested.

In one modality, this transition is imposed on a user and in such a case, a message is displayed on the screen.

2 * IMPI

MEXICAN INSTITUTE

OF THE PROPERTY

INDUSTRIAL reporting the change of service.

Such functions can be implemented as the case may be in a user terminal participating in the communication, in a user terminal supervising a communication in which it no longer participates, and / or also in an application server.

In the embodiment described above, the invention is described with respect to radio terminals. Of course, the invention can also be implemented with the help of any type of terminal (mobile phones, landlines, tablets, computers, servers, for example, applications that give access to an interface that includes a server and an IP camera and a microphone, etc.) and connect to the network through links other than radio links, including wired, optical, etc., The links connect the communication terminals that have the characteristics that must be adapted according to the services.

»IMPI

Mexican Institute of Industrial Property