WO2016129709A1

WO2016129709A1 - Digital broadcasting network with a multiservice return channel (dvb-mrc)

Info

Publication number: WO2016129709A1
Application number: PCT/KG2015/000001
Authority: WO
Inventors: Алмазбек Толкунбаевич АБЕКОВ
Original assignee: Алмазбек Толкунбаевич АБЕКОВ
Priority date: 2015-02-10
Filing date: 2015-12-21
Publication date: 2016-08-18

Abstract

The invention relates to the field of broadcasting, specifically to the sphere of interactive digital television broadcasting, and can be used in television broadcasting networks using various signal-disseminating technologies: digital terrestrial on-air broadcasting (DVB-T), satellite television (DVB-S), cable television (DVB-C) and mobile television (DVB-H), and Internet broadcasting (IPTV). The problem addressed by the invention is the creation of a digital broadcasting network with a multiservice return channel providing for coverage of vast areas within a short time with minimal costs beyond the dependency on a medium for disseminating the TV signal, and also the provision of return channel accessibility, in situations when there is no access to the Internet, such that a subscriber does not need to use another device for participating in an interactive session. The stated problem is solved in that, in a digital broadcasting network with a multiservice return channel (DVB-MRC) consisting of a broadcast operator network with a broadcaster studio, a transmission medium, a subscriber device and interconnection of said network with the network of an Internet services provider, the return channel is extended via a mobile communications operator network, and also the broadcast operator network has a request-processing server which has an interface with the USSD centre of the communications operator, with the possibility of storing a spreadsheet of subscriber priority connections and carrying out inverse transformation of requests into a single protocol-independent and USSD-compatible format, wherein the subscriber device comprises a software module which, together with the request-processing server, provides continuous return channel accessibility and participation in interactive sessions.

Description

DIGITAL BROADCASTING NETWORK

WITH MULTI-SERVICE REVERSE CHANNEL (DVB-MRC)

The invention relates to the field of broadcasting, and in particular to the field of interactive digital television broadcasting (Digital Video Broadcast - DVB) and can be used in television (TV) broadcasting networks using various signal distribution technologies: digital terrestrial broadcasting (DVB- T), satellite (DVB-S), cable (DVB-C), mobile (DVB-H) television and Internet broadcasting (IPTV).

Currently, TV broadcasting networks are known that provide interactive interaction with viewers. For example, there are networks where in order to express an opinion “for” you need to dial one public telephone number, and if you say “against”, you need to dial another phone number. The answering machines on these numbers count the dialers, then the statistics are broadcast (Kuksa V. “Call to Nowhere,” or Live Sociology Notes. / Electronic newspaper “Mirror of the Week. Ukraine”, 2012, N ° 38. http : //gazeta.zn.ua/POLITICS/zvonok_v_ nikuda, _ili_zametki_o_sotsiologii_v jryamom_efire.html).

The disadvantage of this interaction is that for an interactive interaction the viewer needs to use another device - a telephone and be distracted from watching the air in order to make calls. In addition, a telephone connection in itself is a long technological process in the networks of telecom operators, especially if the subscriber calls from the network of another telecom operator.

Networks are also used in which interactive interaction is carried out through the Short Message Service (SMS). The viewer needs to send an SMS message with a specific text to the indicated short number (Altaimolodoi.ru website info service. A new CMC-voting number for Altai Territory will be broadcast live on the “Battle of Choirs” show. / Electronic magazine “Altai Molodoy” , 2013. - http://www.altaimolodoi.ru/).

With this interaction, the viewer, again, needs to be distracted from watching the air, use a mobile phone, pay for SMS delivery services, spend time and attention on typing SMS. On the other hand It is difficult to automate the processing of SMS messages when you need to quickly process and display statistics on the opinions of subscribers. The problem is that subscribers expressing the same opinion, for example, in support of the survey, send different texts (for example: “for”, “za”, “OK”, “yes”, “support”, “well done”, “ molodzy "and so on). This is due to both the mentality of the subscribers and the features of the phone models (for example, the phone may not support the Cyrillic alphabet). Such different requests are difficult to process automatically, and manual processing takes a long time, which is usually not enough during a live broadcast.

A network is also known where the organization of the return channel is carried out through the network of the global system for mobile communications (Global System for Mobile Communications - GSM). The organization of the return channel through the GSM network allows it to be used not only for terrestrial broadcasting networks, but also for satellite and cable networks (ETSI Standard EN 301 195 VI .1.1 (1999-02) - P. 7-9).

The disadvantage of such a network is that the standard does not have a solution to the problem of converting interactive requests at a protocol independent level, including the use of unstructured Supplementary Service Data (USSD). Also, the standard does not contain solutions for formalizing interactive requests in such a way that the various interactive requests are brought into a single format suitable for sending both via the Internet protocol and via a USSD request.

A digital channel with a reverse channel is known in which the reverse channel interacts via the Internet through the services of a service provider. Such a network consists of a broadcasting operator’s network with a broadcaster’s studio, transmission medium, subscriber’s device, as well as the relationship of this network with the network of an Internet service provider (Digital TV DVB-T / H. AV Serov - St. Petersburg: BHV-Petersburg, 2010 .-- S. 22-29).

The disadvantage of this network is that the reverse channel is possible only through the Internet, but there is no solution to the reverse channel in the case when the subscriber does not have access to the Internet.

The objective of the invention is the creation of a digital broadcasting network with a multi-service return channel (Digital Video Broadcast Multiservice Return Channel - DVB-MRC), providing coverage of large regions in a short time at minimal cost, regardless of the TV signal distribution environment, as well as ensuring the availability of the return channel in cases where there is no Internet access so that the subscriber does not need to use another device for participating in an interactive session.

The problem is solved in that in a digital broadcasting network with a multi-service reverse channel (DVB-MRC), consisting of a broadcasting operator’s network with a broadcaster’s studio, transmission medium, subscriber’s device and the relationship of this network with the Internet service provider’s network, the reverse channel is expanded through the mobile operator’s network, as well as the broadcasting operator’s network, has a request processing server that has a junction with the USSD operator’s center with the ability to store a table of subscriber’s priority connections and reverse requests in a single protocol independent and USSD-compatible format, while the subscriber unit contains a software module that provides, together with the request processing server, the constant return channel availability and participation in interactive sessions.

A digital broadcasting network with a multi-service reverse channel (DVB-MRC network) is illustrated by the following schemes:

in FIG. 1 shows a diagram of a DVB-MRC network;

in FIG. 2 - DVB-MRC network architecture;

in FIG. 3 - route of delivery of an invitation to an interactive session;

in FIG. 4 is a flowchart for determining priority connections for a reverse channel;

in FIG. 5 is a block diagram of a request for participation in an interactive session; in FIG. 6 - route IP request for participation in an interactive session;

in FIG. 7 - route USSD request for participation in an interactive session;

in FIG. 8 is a flowchart of processing a request for participation in an interactive session; in FIG. 9 - route confirmation request through USSD.

In the DVB-MRC network (Fig. 1), to achieve the objectives of the invention, the subscriber unit has a software model that can provide interoperability working with information systems of a broadcasting operator both through the Internet and through the USSD center of a communication operator.

The DVB-MRC network architecture (Fig. 2) includes a broadcaster’s studio, equipment for a DVB broadcast operator’s network, a subscriber’s device, mobile operator’s network equipment, an Internet network, a TV monitor and an infrared remote control for a subscriber’s device (Infrared Remote - IR Remote).

The broadcasting studio includes:

live broadcast studio - a set of equipment for video broadcasting from the studio (video cameras, microphones, amplifiers, lighting, decorations);

studio mixer (Studio Mixer) - a set of equipment that provides processing of video and sound coming from the set, as well as mixing with other sources of video and sound (for example, video recordings or media files); at the output of Studio Mixer there is video and sound that make up one television program;

audio encoder (Audio Codec), which converts audio from the Studio Mixer output to MPEG4 or another format defined by the agreement between the broadcaster and the DVB broadcast operator; the choice of format depends on the technical specifications of the Single Program Transport Stream (SPTS);

a video encoder (Video Codec), which, similarly to Audio Codec, converts a video stream;

a multiservice request studio server (MRSS server), which provides interaction between the live studio and a multiservice request server (MRS); according to the conceived scenario, MRSS can display statistics about viewers and the results of their opinions on monitors on the set as a separate layer through Studio Mixer. MRSS can form layers with various dynamic information and broadcast it through the studio mixer, and the MRSS studio server is used to manually or automatically determine the start and end time of interactive surveys of viewers.

The network equipment of a DVB broadcasting operator includes: a Call Center, which is necessary to support viewers and to help resolve issues arising from them; calls to the Call Center can be via telephone or the Internet. In many cases, it may be justifiable to transfer this service to companies specializing in such services;

Billing (Billing) - a settlement center, which is a hardware complex and software for settlements with subscribers, performs the functions of accounting tariffs, maintaining mutual settlements, billing, various operations with personal accounts of subscribers and interacting with accounting;

Data incapsulator - a module that generates Packetized elementary stream (PES) from data coming from the MRS server; subsequently, these streams are embedded in a single-program SPTS transport stream along with video and audio data;

multiplexer of the Single Program Transport Stream (SPTS Multiplex), to the input of which video and sound from the encoders, as well as data generated by the MRS server, are supplied; at the output of the device, a MPEG2 transport stream is received containing one service or one TV program;

a Multi Program Transport Stream (MPTS Multiplex) multiplexer, which, like a single-program multiplexer, creates a multi-program transport stream that combines several single-program SPTS streams;

DVB-T / H / S network transmitter (DVB-T / H / S Transmitter) - a set of equipment and systems for delivering a TV signal through an appropriate propagation medium, respectively, terrestrial, mobile or satellite.

Internet Protocol Television / Cable Television — IPTV / CTV Network — respectively, a set of equipment and systems for delivering a television signal over IP (IPTV) or cable networks (CTV);

Multicast Server, which provides TV broadcasting via the Internet by subscription; Multiservice Requests Server (MRS), which is the core of the DVB-MRC network and generates and processes interactive requests; depending on the traffic model, the number of requests and other technical conditions, the MRS server can consist of one or a group of servers with a separation of the database server, applications and backup;

Broadcasting station DVB-T - a set of equipment that emits radio signals of digital broadcasting.

The subscriber unit consists of:

high-frequency digital broadcast demodulator (DVB Demodulator), which provides signal reception and its primary processing.

Transport Stream Decoder (TS Decoder), which extracts video, sound and data separately from the digital stream;

a data decoder that decodes data extracted from TS Decoder;

a video decoder, which converts the compressed video into horizontal and vertical signals for further display on a television screen;

Audio Decoder, which converts digitized and compressed sound back to analog;

multi-service reverse channel client application (MRC-Client Application - MRC-CA) - software that provides interactive interaction of a subscriber of a DVB-MRC network with an interactive service;

the operating system (OS) of the subscriber device, which is a software environment that provides a platform for other programs to work and interact with physical devices at the firmware level;

multiservice return channel driver (MRC-Driver - MRC-D), which converts interactive queries according to a given algorithm to bring it into a format suitable for sending along a selected route; the MRC-D driver also performs the functions of testing communication channels, rhenium speed, routing the request in case of problems with the main feedback channel. The MRC-D driver also performs the inverse function of receiving requests from the MRS server;

controller devices on the motherboard (MB Controllers - MVS), i.e. various controllers on the motherboard (Mother Board) subscriber device network DVB-MRC;

Wi-Fi controller (Wi-Fi Controller) for wireless Internet connection; the presence or absence of a Wi-Fi port depends on the technical solution of a specific subscriber device of the DVB-MRC network;

network controller (Ethernet Controller) for a wired connection to computer networks in order to provide Internet access; in the case of IPTV and multicast broadcasting, this port will be the default, because the Ethernet network is the medium for the digital stream distribution for such networks;

GSM modem (GSM Modem) for connecting to GSM networks. This is the main means of providing a reverse channel if the subscriber does not have access to the Internet through fixed communication channels; through the GSM modem, the reverse channel is implemented using various technologies: LTE (Long Term Evolution), 3G (third generation mobile communication service), GPRS (General Packet Radio Service) and USSD; if the first three provide a normal Internet connection through the mobile operator’s network, and from the point of view of organizing the interaction of the client application of the DVB-MRC network (MRC-CA) with the MRS server, they do not differ from the interaction via the Ethernet port, then the latter - USSD, has absolutely a different request exchange format is the essence of the invention of the DVB-MRC network;

a video output controller (High Definition Multimedia Interface - HDMI Controller), which is an interface for physically connecting the video output of a subscriber receiver to the video input of a TV;

infrared controller (IR Controller) - an infrared port controller that receives and processes user commands that he gives using the remote control;

The network equipment of a mobile operator includes: the center for processing unstructured requests (USSD Center) received from subscribers; in the DVB-MRC network, the USSD center ensures the interaction of the mobile operator’s network with the MRS server if the interactive reverse channel is via USSD messages. The USSD center re-routes USSD requests from subscribers to the MRS server and vice versa; routing is carried out according to the short number range allocated for the DVB-MRC network; DVB-MRC network subscribers are identified by the International Mobile Subscriber Identity (IMSI), which is the standard identification tool for GSM networks;

data transmission services in mobile networks GPRS Service, 3G Service, LTE Service, which are a set of equipment and software that provides subscribers with Internet access through various technologies; in the DVB-MRC network, data services are used as means of access to the MRS server via a modem – mobile network –– MRS Internet server;

base stations of the network of a mobile operator (The Base Transceiver Station - BTS) - a distributed network of base stations of a mobile operator, provides radio access between a mobile phone (in the case of a DVB-MRC network - a modem) and the operator’s network;

Billing - a billing center of a mobile operator, a hardware and software system for settlements with subscribers, performs various operations with personal accounts of subscribers and provides interaction with customer service centers, as well as operator’s accounting;

Visitor Location Register (VLR), which is the temporary base of subscribers in the coverage area of a specific VLR; Home Location Register (HLR) - a register of home network subscribers, a database of the mobile operator’s own subscribers, provides identification of subscribers;

Mobile Switching Center (MS C) - the core of the mobile operator’s network, the actual switching field that provides connections between subscribers, as well as between subscribers and various services. The devices and applications of the digital channel network with a reverse channel (DVB-MRC) interact as follows.

Identification of priority compounds.

When making the initial settings of the subscriber device, as well as in the subsequent, if there have been changes in the availability of certain connections for the reverse channel, as well as after updating the MRC-CA client application and the MRC-D driver or replacing network devices (modem, Ethernet or WiFi network card), it is necessary to carry out the procedure for updating priority connections for the return channel (Fig. 4).

The hierarchy of priority connections is necessary so that if the communication on one channel fails, the MRC-D driver can automatically switch to another. This information is also required by the MRS server in case of an unforeseen technical communication failure when sending a request confirmation.

Invitation to an interactive session.

The route for delivering an invitation to an interactive session in a DVB-MRC network from entering a command in a live broadcast studio to displaying the invitation text on a subscriber’s television screen is shown in FIG. 3.

A live director or his assistant from their workplace enter a command to send an invitation to an interactive session. The command is entered from the interface of a specially developed application for the studio MRSS server.

The MRSS studio server application generates a data packet that makes up an invitation to an interactive session, which includes the necessary amount of information for the viewer, as well as service information for administering the session. The data packet may include an interactive session ID identifier, invitation texts for an interactive session in several languages, a Start time stamp, and a file path.

The interactive session ID is a unique identifier that should be as short as possible and can be alphanumeric. The session ID can be generated by the MRS server (multi-service request server) at the request of the MRSS studio server, which simplifies the task and provides greater reliability and ease of administration. Generating a session ID by the MRS server becomes necessary if the DVB-MRC network expands, a large number of interactive sessions are conducted, and the MRS server serves several single-program SPTS transport streams. But in the simplest case, it’s enough if the live broadcast director manually enters the game’s ID and the application checks for uniqueness.

The texts of the invitation to the interactive session are compiled in several languages. The invitation text can be entered manually or also generated automatically by the MRS server application. The multi-lingual nature of the invitation provides convenience for a large audience of viewers, and in some cases it may even be necessary, for example, when the question posed to the viewer is quite complicated and there is a risk of incorrect translation of complex terms. Subsequently, on the TV screen the invitation text will be shown in the language that the viewer has chosen in personal settings. Invitation texts in different languages should be separated by a special label, for example # ep * English text * #ru * Russian text * #fr * Texte francais *. The number of characters in the invitation text should not be too large, otherwise it will be difficult to place it entirely on the TV screen, especially if the viewer still uses the TV of the past eras with a huge picture tube.

The time stamp Start is necessary to indicate when the invitation should be shown on the TV screen. In the simplest case, you can set the sync mark, then the invitation will be shown synchronously with the corresponding live video frame. The time stamp may include additional parameters, for example, the duration of the invitation or the time stamp Stop. The format of time stamps depends on the DVB broadcast medium used, therefore, when defining formats, refer to the relevant standards.

The file path indicates the address of the file that will be used to inform the subscriber at the invitation and which is located locally on the subscriber's device. This file may contain text and sound (if necessary) of an agreement on participation in an interactive session, as well as parameters of their war works. The rules can also be voiced live, then there is no need to play locally and this parameter may be empty. The parameter is empty even if an agreement is not required. However, if the interactive session has a monetary aspect, age limit or other restrictions, then an agreement may be necessary for legal reasons.

In accordance with the received command, an algorithm is launched on the MRS server, which includes a number of tasks: making a record in the database; generating tables, in which data on registration of subscribers will be entered in the future; PES stream generation.

The PES stream contains the address of the MRS server itself. For the reverse channel via the Internet, this is the IP address of the MRS server, and for USSD data, this is a dedicated number for requests. Next, the invitation in the form of a data stream enters the SPTS multiplexer, where together with the video and sound of the TV program it is formed into a single stream of the MPEG2 standard.

From the output of the SPTS multiplexer, depending on the distribution medium of the program, the signal is fed to the corresponding device.

The television signal received by the subscriber unit undergoes a reverse decoding process. An elementary data stream containing an invitation to an interactive session is extracted from the general transport stream and processed by the MRC-CA client application. Based on the invitation text and user settings (language, subscriptions, parental controls, templates, etc.), the MRC-CA client application can ignore the invitation to an interactive session, for example, if a parental restriction to interactive sessions is set. The MRC-CA client application also checks the identifier of the interactive session ID for duplication, if this invitation has already been shown to the subscriber. Also, ignoring the invitation may be due to the lack of a subscription. If the invitation to an interactive session satisfies the restrictions, then the MRC-CA client application generates an image layer in accordance with user settings and transmits this data to the video controller of the subscriber's device with subsequent display on the TV screen. In accordance with the time stamp settings, the default prompt disappears from the screen. Also, the invitation can be removed from the screen with a command from the remote control of the subscriber device.

If the viewer wants to participate in an interactive session, then he presses the corresponding button on his remote control and the process of registering the viewer in the interactive session begins.

Request for participation in an interactive session

The viewer, having familiarized himself with the invitation, expresses a desire to participate in an interactive session by pressing the corresponding button on the remote control of the subscriber's device (Fig. 5). Via the infrared receiver controller, this signal is sent to the MRC-CA client application.

If there was an agreement mark in the invitation package, the MRC-CA client application finds and plays the corresponding media file containing, in some form, an agreement on participation in the interactive session. Such an agreement may be required for legal reasons, especially if the interactive session has a paid basis. Media files in several languages must be sent in advance using DVB-DATA.

Upon completion of the media file playback, the subscriber is invited to accept the terms of the agreement. The subscriber signs the agreement by pressing the corresponding button on the remote control. MRC-CA generates a digital signature, makes appropriate entries in the protocol files and forms a request packet for participation in an interactive session.

The generated request packet for participation in the interactive session is transmitted to the application that performs the functions of query adaptation and reverse channel route management - the MRC-D multiservice return channel driver. The package also contains the IP address of the MRS server and a short number allocated for sending the request via USSD data.

If the subscriber has established the connection priority, for example, via Ethernet, the MRC-D driver sends a request for participation in the interactive session to the IP address of the MRS server (Fig. 6). When sending an IP request through the mobile operator’s network, it must be taken into account that this service is charged and it is usually more expensive than wired Internet connections.

Upon completion of sending the request, the MRC-D driver returns an execution command to the MRC-CA client application and the MRC-CA client application forms a picture on the TV screen with a message about sending the request and waiting for confirmation of registration for an interactive session.

For each incoming request, the MRS server maintains a connection session until it processes the request and returns a confirmation or denial code. Then the connection session is interrupted until the next request.

Processing a request for participation in an interactive session.

After the request for participation in the interactive session is delivered, the MRS server carries out registration verification procedures, then, if registration is enabled, performs the appropriate operations and then sends a notification to the subscriber (Fig. 8).

Upon receipt of the request, a corresponding entry is made in the database of the MRS server and a unique code is assigned to the request for its subsequent identification.

Verification of the possibility of registering a subscriber in an interactive session is carried out according to a number of criteria that depend on the goals, objectives or scenario of each particular session. If, for some sessions, you first need to check the availability of funds on the subscriber’s personal account, then no verification may be required to express the opinion of subscribers on news or video clips.

In case of refusal to register, a notification with a refusal code is sent to the subscriber. The fault code can be defined in the table at the end of the description. A three-digit alphanumeric field is more than enough to describe any possible options for refusal of registration, as well as notifications.

If registration is permitted and the conditions of participation require withdrawing funds from the subscriber’s personal account, the corresponding transaction is performed in the billing system of the DVB-MRC broadcast network operator. After completion of the prescribed procedures, the corresponding entries are entered into the MRS server database, registration notification is generated and sent.

Notification of the confirmation of the registration request is sent by the same route as the request.

Request for participation and notification of registration through data

USSD

The procedure for using USSD data to send and receive notifications is somewhat different from IP connections. This is due to several features of the USSD service: USSD has a request length limit of 182 characters; by coding (usually it is Latin); USSD can be routed to the MRS server only through the USSD center of the mobile operator; a USSD session may be interrupted when a request from a subscriber device reaches the mobile operator’s network; User identification using USSD is possible through the IMSI (International Mobile Subscriber Identity).

The USSD request is routed by the USSD center short number at the beginning, which has the format * xxx #, therefore, by agreement with the mobile operator, it is necessary to allocate a separate number for each MRS server. Thus, when using USSD, the short number is used similarly to the IP address.

IMSI is the standard means of identifying a subscriber without which a mobile connection is not possible. The use of the IMSI identifier in DVB-MRC networks greatly simplifies the task of identifying the subscriber, and in the case of using USSD requests, it also reduces the length of the USSD request.

Using the IMSI will not be possible if, for technical reasons, the return channel via USSD is interrupted and communication is restored via Ethernet during the same session. In this case, the MRS server will send a request confirmation in the form of an IP packet, but for IP connections, the IMSI identifier does not matter, and without additional information, the MRS server will not be able to identify the subscriber. The opposite situation may also occur. When an unexpected interruption of communication occurred while connecting via the Internet. Then the MRS server will attempt to deliver the request confirmation via the USSD request.

Therefore, in order to ensure reliability, it is still better to use an independent user identifier, for example, the MAC address (Media Access Control - media access control, also Hardware Address) of the network device. Alternatively, it can be identified through the MRC-CA client application, for example, by personal account number, contract number or other identifiers that the subscriber enters when registering the device in the DVB-MRC network.

The advantage of this method of identifying the subscriber is also that when replacing the device, for example, if the network card is broken, the MAC address that is hardcoded in the device’s memory also changes, and re-registering the personal account number and re-registering the device is quite easy.

The final decision on the method of subscriber identification should be made based on a careful study of the architecture of each specific DVB-MRC network.

USSD request route.

The USSD request is sent via the GSM modem using the AT command (Hayes command set) (Fig. 7). Request delivery is carried out by standard means of the mobile operator’s network. Possible GSM network errors when sending a USSD request are processed by the MRC-D driver and, if necessary, are displayed on the TV screen.

When processing a received USSD request, the MSC interacts with the HLR and VLR registers. Further, the USSD request is processed by the USSD center of the mobile operator, where the command for sending this request to the MRS server is registered using the short number. It is possible to configure the system so that after this operation, the USSD center sends a command to the MRC-D driver about the delivery of the request to the MRS server, about which a notification will then appear for the subscriber through the MRC-CA client application.

Unlike an IP request via the mobile operator’s network, the USSD request is not processed by the operator’s billing system. If there is a need to conduct any kind of money transaction related to an interactive session in the DVB-MRC network, for example, to replenish the balance via mobile transfer to participate in an interactive game, then for the possibility of such operations, it is necessary to arrange interaction between billing systems - by the operator DVB broadcasting operator and mobile operator (Fig. 9). The integration of billing systems of a DVB-MRC network operator and a mobile operator can open up many interesting business opportunities and offer subscribers many attractive offers.

Convert DVB-MRC network requests to USSD format.

The request is converted to the USSD message format by the MRC-D driver, however, this division is very arbitrary, because the MRC-D driver can be a module of the MRC-CA client application, it all depends on the programming method.

The variables that make up the USSD request should be ordered according to predefined rules that are equally defined for the MRC-CA client application, the MRC-D driver, and the MRS server.

The proposed DVB-MRC network has several advantages. Firstly, voice communication channels are not used for the transfer of USSD requests in the networks of mobile telecom operators, and this uniqueness creates the conditions for creating a DVB-MRC network and ensuring the fast processing of a large number of simultaneous requests. Secondly, allocating a separate range of numbers can facilitate the administration of USSD requests. Thirdly, the unification of interactive requests allows for effective interaction even when there is no access to the Internet, because the USSD request is sent as an AT command and only via a GSM modem, and the IP packet is sent to the IP address of the MRS server through any available Internet connection. Fourth, such a network can be deployed quickly enough, without large capital expenditures and provide vast territories with interactive service. Table. Basic Variable List

Identification Variable- Discharge- Example Description

reading

Unique identificator

Subscriber ID of the DVB-MRC network. subscriber Identifier can be defined in the contract, for example, and 10 151014xzm

measures N ° of the contract or generated in the database of the MRS server at the initial registration

Identifier A unique code for an interactive interactive session. It is generated during a S 3 1AC session, initiating a session of the MRSS server or MRS server.

Identifier A unique code for an interactive interactive session within one session of the E 2 10th session. Generated and distributed by the studio MRSS server or the MRS server.

Unique number assigned

A unique request for each incoming request number to your request. Capacity

R 5-10 - this field depends on the number of subscribers in the DVB-MRC network and the frequency of requests.

Client Update Version

The client-firmware version of the MRC-CA firmware application is required to determine the client application compatibility of the MRC-CA MRC-application with the current V 2 2В session. For example, an outdated version of the MRC-CA client application may not have the necessary libraries or the necessary media files. In this case the subscriber may be refused with a notification about the need to update the version of the MRC-CA client application.

Request Code Request Code Forwarded

C 2 G1

subscriber.

Processing result code

The subscriber’s millet result code contains the request “request code” received from

A 3 G10

the subscriber and the response code (in this example: the response to the G1 request is answered with the code 0)

Digital - Digital signature generated by MRC-CA if accepted.

G 30-50

Subscriber's agreement to the terms of the agreement.

The unique IMSI number assigned by the modem number to the modem SIM card is used by GSM M 15 to identify the device in the network of the mobile operator

MAC address of the network device

Unique identifier, assigned at the factory by the network number I at the time of manufacture, and is the device's unique identifier

Feedback channel code,

The channel code contains information on the telephone communication about which channel the request was delivered to and which channel

N 1 W is selected as a priority for the subscriber. For example, W can mean that the request was delivered via an IP Wi-Fi connection

Claims

CLAIM

Digital Service Network with a Multiservice Reverse Channel (DVB-MRC), consisting of the network of the broadcast operator with the broadcaster’s studio, transmission medium, subscriber’s device and the relationship of this network with the network of the Internet service provider, w ith I mean that the return channel is expanded through the network of the mobile operator, as well as in the network of the broadcast operator there is a request processing server that has a junction with the USSD center of the communication operator with the ability to store a table of priority subscriber connections and reverse request into a single protocol independent and USSD-compatible format, while the subscriber unit contains a software module that, together with the request processing server, ensures the constant availability of the return channel and participation in interactive sessions.