WO2022015188A1 - System for audio streaming on smartphones - Google Patents

System for audio streaming on smartphones Download PDF

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Publication number
WO2022015188A1
WO2022015188A1 PCT/RU2020/000348 RU2020000348W WO2022015188A1 WO 2022015188 A1 WO2022015188 A1 WO 2022015188A1 RU 2020000348 W RU2020000348 W RU 2020000348W WO 2022015188 A1 WO2022015188 A1 WO 2022015188A1
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Prior art keywords
unit
data
network
receiving
smartphone
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PCT/RU2020/000348
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French (fr)
Russian (ru)
Inventor
Теймураз Юрьевич ОКРОЕВ
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Общество С Ограниченной Ответственностью "Турфон"
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Priority to PCT/RU2020/000348 priority Critical patent/WO2022015188A1/en
Publication of WO2022015188A1 publication Critical patent/WO2022015188A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the invention relates to the field of radio engineering, in particular to technologies for building wireless self-organizing communication networks in public systems containing subscriber, base, switching stations.
  • FireChat is an offline instant messaging client for Android and iOS. Bluetooth and WiFi wireless networks are used to send text messages and images, devices with FireChat installed can detect each other within a radius of up to 60 meters. Source: https://www.opengarden.com/firechat/. This service is not intended for streaming audio in real time.
  • Intercom, Serval, Bridgefy are communication services based on data transmission over a mesh network, and also do not involve pairing different platforms (iOS and Android) and do not set themselves the task of streaming audio in real time.
  • the technical problem to be solved relates to the development of a hardware solution that allows organizing streaming audio broadcasting to users' smartphones (visitors of international events, tourists, fans, etc.) without an Internet connection.
  • the audio stream must be transmitted without distortion to an unlimited number of devices with the possibility of simultaneous broadcasting on one or several different channels and with a delay of no more than 2 seconds.
  • the indicated technical results are achieved by creating a system for streaming broadcasting to smartphones, which contains: a video image display and recognition unit and a data reception and transmission unit connected to it, moreover, the video data display and recognition unit is connected to the smartphone display and video camera and is configured to output QR -code on the display or recognition of a QR code, decryption of the information contained in it and transmission to the data receiving-transmitting unit, while the data receiving-transmitting unit is connected to the receiving-transmitting antenna, speaker and microphone of the smartphone and is configured to process the information received from the video image display and recognition unit, on the basis of which data packets containing at least audio data and time codes are received and transmitted to other network devices, as well as audio data is output to the smartphone speaker.
  • FIG. 1 The basic user connection diagram is shown in Fig. 1
  • FIG. 2 The topology of the network under consideration is shown in FIG. 2.
  • the disadvantage of the previously mentioned methods of building a peer-to-peer connection is a high probability of transmission failure due to non-reception by one of the network devices of requests to continue transmission.
  • the proposed technical solution significantly expands the functionality of wireless access to network services and allows the implementation of access points with coverage and bandwidth reduction threshold an order of magnitude higher than that of the common one-to-many connection, which positively affects the resulting delays and maximum network throughput.
  • the network With the ability to provide secure wireless coverage on the streets, in urban areas or in large communities and areas, the network can be used for rapid deployment, in particular a communication network for homeland security purposes or in case of emergencies in the city.
  • each element is connected to several other elements of the same network, which allows you to achieve the ability to vary routes through segments with better connectivity.
  • the topology of the considered network is shown in Fig. 2.
  • the data is redirected to the nearest unloaded node by the data receiving-transmitting unit.
  • the block of data continues to move from one node to another until it reaches its destination.
  • the key functionality is the self-organization functionality, i.e. the failure of intermediate nodes or the addition of new nodes to the network will not lead to the destruction of the network, but will only reduce (or increase) its coverage area and throughput. Due to the peculiarities of the protocol, the deployment time of this network is limited only by the speed of distribution of access points over the planned coverage area.
  • the claimed system interacts over a network with the following elements: equipment for creating an information environment (client devices based on iOS and Android operating systems), information and communication portals. It should also be noted that the claimed system has the ability to combine with the above elements, forming a complex.
  • the information portal is designed to coordinate the connectivity of the network and carries service information. It is a web resource that is automatically accessed by any device through a machine-readable API that works on the principles of Representation State Transfer (REST API).
  • the communication portal is intended for communication between network members and beyond, built on the principle of client-client communication.
  • the portal provides voice as well as text communication in real time, based on the exchange of information through time slots. These technologies are quite common and are supported by most devices initially. However, to unify the access system, it is possible to access these services using a special application developed for the main operating systems of smartphones: Android and iOS. Such an application can be downloaded from the information portal and you can start using it without additional settings.
  • the subscriber needs to perform an initial scan of a QR code containing encryption keys for information transmitted over the network. This stage is carried out by the system by means of a block for displaying and recognizing video data.
  • the use of the Nearby Connections and Multipeer Connectivity frameworks made it possible to transfer data between devices via Bluetooth with a delay of no more than 1.5 seconds.
  • the subscriber device which is an audio broadcaster
  • the mode of forming a mesh network In this mode, a QR code containing information encrypted in accordance with the base64 standard is displayed on the device screen.
  • the subscriber device connected to the network as a listener due to the video image display and recognition unit, is switched to the mode of scanning the specified code, and after detecting such a code in the camera's field of view, it is recognized and read information, after which the procedure for connecting to the network takes place.
  • the nearest connection search module is activated, which works according to the Nearby Connections standard, which allows you to detect mesh networks within the communication radius and log in to them using the previously transferred keys.
  • the nearest connections search module is activated, which works according to the Multipeer Connectivity standard, which allows you to connect to the mesh network within the communication radius formed by other iOS devices and log in to them using the previously transmitted keys, and it also searches for networks using WiFi Aware technology, which allows you to authorize an iOS device in a network formed by subscriber Android devices.
  • the subscriber device After authorization in the network, the subscriber device polls other devices authorized in the network to identify the device that is the source of the audio signal, as well as to identify two devices with the maximum level of connectivity with this device to form an internal network topology built in the form of a graph, which is necessary to avoid disconnection due to sudden disconnection from the network of one of its other participants.
  • synchronization of the current time code is also carried out, which is necessary for further transmission and playback of streaming audio broadcasting.
  • Broadcasting is carried out from one device, the audio stream on which is converted using the h.256 codec into a bit-by-bit set of information, which is then split into separate packets, which also includes the checksum and time code of the record fragment; packets are broadcast over the network to all subscriber devices.
  • Devices whose connected nodes are devices other than the broadcaster's device request information from the devices connected to them and thus also have access to the transmitted information. Due to the checksum, it is possible to avoid the situation of doubling the received packets, and the time code information makes it possible to restore an audio stream from digital information, which is then played back on the subscriber device.
  • service and user text information is transmitted over the network due to the data receiving and transmitting unit, but instead of the h.256 codec, which is not suitable for processing this type of data, base64 encryption is used, which reduces the load on the network by reducing amount of transmitted information.
  • One of the subscribers in the network is assigned to work as a central (base) station. With the help of the central station, access to the channel is controlled for the rest of the network subscribers, which are subscriber stations.
  • radio exchange between subscriber stations is carried out through the central station using the time division multiple access (TDMA) method: the communication channel is divided into time frames, which, in turn, are divided into time intervals (slots), where network stations are allowed to transmit and receive information .
  • TDMA time division multiple access
  • the central station polls the registered subscriber stations periodically.
  • the polling procedure consists in that the central station opens service channels for registered subscriber stations and waits for responses to polling service packets. If available at information to be transmitted to the subscriber station (requests to open a channel from equipment connected to the subscriber station, etc.), it transmits them in an open service channel before responding to the polling service packet. If the subscriber station has no information to transmit, it sends a poll response packet to the central station.

Abstract

The invention relates to the field of radio-frequency engineering, and more particularly to technology for creating wireless self-organizing communications networks in systems for shared use, containing subscriber stations, base stations and switching stations. The present system comprises a unit for displaying and recognizing video images and, connected thereto, a unit for receiving and transmitting data, wherein the unit for displaying and recognizing video images is connected to a display and a video camera of a smartphone and is capable of displaying a QR code on the display or of recognizing a QR code, deciphering the information contained in said code and transmitting same to the unit for receiving and transmitting data. The unit for receiving and transmitting data is connected to a transceiver antenna, a speaker and a microphone of the smartphone and is capable of processing information received from the unit for displaying and recognizing video images, on the basis of which data packets containing at least audio data and time codes are received and transmitted to other devices within the network and audio data is output to the speaker of the smartphone. The solution makes it possible to organize audio streaming on user smartphones without connecting to the Internet.

Description

СИСТЕМА ПОТОКОВОГО АУДИОВЕЩАНИЯ НА СМАРТФОНЫ AUDIO STREAMING SYSTEM FOR SMARTPHONES
Область техники Technical field
Изобретение относится к области радиотехники, в частности к технологиям построения беспроводных самоорганизующихся сетей связи в системах общего пользования, содержащих абонентские, базовые, коммутационные станции. The invention relates to the field of radio engineering, in particular to technologies for building wireless self-organizing communication networks in public systems containing subscriber, base, switching stations.
Уровень техники State of the art
В уровне техники известны следующие приложения: FireChat — работающий без интернета клиент мгновенного обмена сообщениями для Android и iOS. Для передачи текстовых сообщений и изображений используются беспроводные сети Bluetooth и WiFi, устройства с установленным FireChat могут обнаруживать друг друга в радиусе до 60 метров. Источник: https://www.opengarden.com/firechat/. Данный сервис не предназначен для стриминга аудио в режиме реального времени. The following applications are known in the art: FireChat is an offline instant messaging client for Android and iOS. Bluetooth and WiFi wireless networks are used to send text messages and images, devices with FireChat installed can detect each other within a radius of up to 60 meters. Source: https://www.opengarden.com/firechat/. This service is not intended for streaming audio in real time.
Intercom, Serval, Bridgefy — коммуникационные сервисы, основанные на передаче данных по mesh-сети, также не предполагают сопряжения различных платформ (iOS и Android) и не ставят перед собой задачу стриминга аудио в режиме реального времени. Intercom, Serval, Bridgefy are communication services based on data transmission over a mesh network, and also do not involve pairing different platforms (iOS and Android) and do not set themselves the task of streaming audio in real time.
Технический результат Technical result
Решаемая техническая задача относится к разработке аппаратного решения, позволяющего организовать потоковое аудиовещание на смартфоны пользователей (посетителей международных мероприятий, туристов, болельщиков и т. п.) без подключения к интернету. Аудиопоток должен передаваться без искажений на неограниченное число устройств с возможностью одновременного вещания на один или несколько разных каналов и с задержкой не более 2 секунд. The technical problem to be solved relates to the development of a hardware solution that allows organizing streaming audio broadcasting to users' smartphones (visitors of international events, tourists, fans, etc.) without an Internet connection. The audio stream must be transmitted without distortion to an unlimited number of devices with the possibility of simultaneous broadcasting on one or several different channels and with a delay of no more than 2 seconds.
Технический результат совпадает с технической задачей. Дополнительный технический результат заключается в расширении функциональных возможностей заявляемого устройства. The technical result coincides with the technical problem. An additional technical result is to expand the functionality of the proposed device.
Указанные технические результаты достигаются за счет создания системы для потокового вещания на смартфоны, которое содержит: блок отображения и распознавания видеоизображения и соединенный с ним блок приема-передачи данных, причем блок отображения и распознавания видеоданных соединён с дисплеем и видеокамерой смартфона и выполнен с возможностью вывода QR-кода на дисплей или распознавания QR-кода, расшифровки содержащейся в нем информации и передачи в блок приема- передачи данных, при этом блок приема-передачи данных соединен с приемо- передающей антенной, динамиком и микрофоном смартфона и выполнен с возможностью обработки информации, полученной от блока отображения и распознавания видеоизображения, на основе которой производится получение и передача к другим устройствам сети пакетов данных, содержащих, по меньшей мере, аудиоданные и тайм-коды, а также вывода аудиоданных в динамик смартфона. The indicated technical results are achieved by creating a system for streaming broadcasting to smartphones, which contains: a video image display and recognition unit and a data reception and transmission unit connected to it, moreover, the video data display and recognition unit is connected to the smartphone display and video camera and is configured to output QR -code on the display or recognition of a QR code, decryption of the information contained in it and transmission to the data receiving-transmitting unit, while the data receiving-transmitting unit is connected to the receiving-transmitting antenna, speaker and microphone of the smartphone and is configured to process the information received from the video image display and recognition unit, on the basis of which data packets containing at least audio data and time codes are received and transmitted to other network devices, as well as audio data is output to the smartphone speaker.
Краткое описание изображений Brief description of images
Базовая схема подключения пользователей представлена на Фиг. 1 Топология рассматриваемой сети представлена на Фиг. 2. The basic user connection diagram is shown in Fig. 1 The topology of the network under consideration is shown in FIG. 2.
Общая схема формирования временного кадра представлена на Фиг. 3 Сущность изобретения The general scheme for the formation of a temporary frame is shown in Fig. 3 The essence of the invention
Недостатком указанных ранее способов построения пирового соединения является большая вероятность срыва передачи из-за неприема одним из устройств сети запросов на продолжение передачи. The disadvantage of the previously mentioned methods of building a peer-to-peer connection is a high probability of transmission failure due to non-reception by one of the network devices of requests to continue transmission.
Заявляемое техническое решение значительно расширяет функциональность беспроводного доступа к сетевым сервисам и позволяет реализовывать точки доступа с охватом и порогом снижения пропускной способности на порядок более высоким, чем у распространенного соединения один — много, что положительным образом влияет на возникающие задержки и максимальную пропускную способность сети. Благодаря возможности обеспечения защищенного беспроводного покрытия на улицах, в городской местности или в крупных населенных пунктах и районах сеть может быть использована для быстрого развертывания, в частности сети связи для целей внутренней безопасности или в случаях чрезвычайных ситуаций в городе. The proposed technical solution significantly expands the functionality of wireless access to network services and allows the implementation of access points with coverage and bandwidth reduction threshold an order of magnitude higher than that of the common one-to-many connection, which positively affects the resulting delays and maximum network throughput. With the ability to provide secure wireless coverage on the streets, in urban areas or in large communities and areas, the network can be used for rapid deployment, in particular a communication network for homeland security purposes or in case of emergencies in the city.
В сети каждый элемент связан с несколькими другими элементами этой же сети, что позволяет достичь возможности варьировать маршруты через сегменты с лучшими показателями связи. Топология рассматриваемой сети представлена на Фиг. 2. In the network, each element is connected to several other elements of the same network, which allows you to achieve the ability to vary routes through segments with better connectivity. The topology of the considered network is shown in Fig. 2.
Если ближайшая точка доступа перегружена, то данные за счет блока приема- передачи данных, перенаправляются к ближайшему незагруженному узлу. Блок данных продолжает перемещаться от одного узла к другому, пока не достигнет места назначения. If the nearest access point is overloaded, then the data is redirected to the nearest unloaded node by the data receiving-transmitting unit. The block of data continues to move from one node to another until it reaches its destination.
Ключевым функционалом является функционал самоорганизации, т. е. выход из строя промежуточных узлов или добавление новых узлов в сеть не приведет к разрушению сети, а только снизит (или увеличит) её зону покрытия и пропускную способность. Благодаря особенностям протокола время разворачивания данной сети ограничивается только скоростью распределения точек доступа по зоне планируемого покрытия. Заявляемая система по сети взаимодействует со следующими элементами: оборудование для создания информационной среды (клиентские устройства на базе операционных систем iOS и Android), информационный и коммуникационный порталы. Также следует отметить, что заявляемая система имеет возможность объединяться с вышеуказанными элементами, образуя комплекс. The key functionality is the self-organization functionality, i.e. the failure of intermediate nodes or the addition of new nodes to the network will not lead to the destruction of the network, but will only reduce (or increase) its coverage area and throughput. Due to the peculiarities of the protocol, the deployment time of this network is limited only by the speed of distribution of access points over the planned coverage area. The claimed system interacts over a network with the following elements: equipment for creating an information environment (client devices based on iOS and Android operating systems), information and communication portals. It should also be noted that the claimed system has the ability to combine with the above elements, forming a complex.
Информационный портал предназначен для координации связанности сети и несет в себе служебную информацию. Он представляет собой веб-ресурс, доступ к которому автоматически получает любое устройство посредством программного интерфейса с машиночитаемым доступом, работающего по принципам передачи состояния представления (REST API). Коммуникационный портал предназначен для осуществления связи между участниками сети и за её пределы, построен по принципу клиент-клиент коммуникации. Порталом обеспечивается голосовая, а также текстовая связь в режиме реального времени, основанная на обмене информации посредством временных слотов. Эти технологии достаточно распространены и поддерживаются большинством устройств изначально. Однако для унификации системы доступа возможен доступ к этим сервисам при помощи специального приложения, разработанного для основных операционных систем смартфонов: Android и iOS. Такое приложение можно загрузить с информационного портала и начать им пользоваться без дополнительных настроек. Для подключения к информационному порталу абоненту необходимо провести первичное сканирование QR-кода, содержащего в себе ключи шифрования передаваемой в сети информации. Данный этап осуществляется системой посредством блока отображения и распознавания видеоданных. The information portal is designed to coordinate the connectivity of the network and carries service information. It is a web resource that is automatically accessed by any device through a machine-readable API that works on the principles of Representation State Transfer (REST API). The communication portal is intended for communication between network members and beyond, built on the principle of client-client communication. The portal provides voice as well as text communication in real time, based on the exchange of information through time slots. These technologies are quite common and are supported by most devices initially. However, to unify the access system, it is possible to access these services using a special application developed for the main operating systems of smartphones: Android and iOS. Such an application can be downloaded from the information portal and you can start using it without additional settings. To connect to the information portal, the subscriber needs to perform an initial scan of a QR code containing encryption keys for information transmitted over the network. This stage is carried out by the system by means of a block for displaying and recognizing video data.
Использование фреймворков Nearby Connections и Multipeer Connectivity позволило передавать данные между устройствами по Bluetooth с задержкой не более 1 ,5 секунды. Для первичного создания сети необходимо перевести абонентское устройство, являющееся аудиовещателем, в режим формирования mesh-сети. В данном режиме на экран устройства выводится QR-код, содержащий информацию, зашифрованную в соответствии со стандартом base64. Абонентское устройство, подключаемое к сети в качестве слушателя, за счет блока отображения и распознавания видеоизображения переводится в режим сканирования указанного кода, и после обнаружения такого в поле зрения камеры происходит его распознавание и считывание информации, после чего происходит процедура подключения к сети. В случае если абонентское устройство работает на базе ОС Android, активируется модуль поиска ближайших соединений, работающий по стандарту Nearby Connections, что позволяет обнаружить mesh-сети в радиусе связи и авторизоваться в них с помощью переданных ранее ключей. В случае если абонентское устройство работает на базе ОС iOS, активируется модуль поиска ближайших соединений, работающий по стандарту Multipeer Connectivity, позволяющий подключиться к mesh-сети в радиусе связи, образованной другими iOS-устройствами, и авторизоваться в них с помощью переданных ранее ключей, а также осуществляется поиск сетей, работающих по технологии WiFi Aware, что позволяет авторизовать iOS-устройство в сети, образованной абонентскими Android-устройствами. После авторизации в сети абонентское устройство производит опрос других устройств, авторизованных в сети, для выявления устройства, являющегося источником аудиосигнала, а также выявления двух устройств с максимальным уровнем связанности с данным устройством для формирования внутренней топологии сети, выстроенной в виде графа, что необходимо во избежание обрыва соединения при внезапном отключении от сети одного из других ее участников. В процессе опроса устройств также проводится синхронизация текущего тайм-кода, что необходимо при дальнейшей передаче и воспроизведении потокового аудиовещания. Вещание осуществляется с одного устройства, звуковой поток на котором преобразуется с помощью кодека h.256 в побитовый набор информации, который затем разбивается на отдельные пакеты, куда также включается контрольная сумма и тайм-код фрагмента записи; вещание пакетами производится по сети на все абонентские устройства. Устройства, подключенными узлами которых являются устройства, отличные от устройства вещателя, запрашивают информацию от подключенных к ним устройств и таким образом также имеют доступ к передаваемой информации. За счет контрольной суммы возможно избежать ситуации задвоения полученных пакетов, а информация о тайм-коде позволяет восстанавливать из цифровой информации аудиопоток, который затем воспроизводится на абонентском устройстве. The use of the Nearby Connections and Multipeer Connectivity frameworks made it possible to transfer data between devices via Bluetooth with a delay of no more than 1.5 seconds. For the initial creation of a network, it is necessary to transfer the subscriber device, which is an audio broadcaster, to the mode of forming a mesh network. In this mode, a QR code containing information encrypted in accordance with the base64 standard is displayed on the device screen. The subscriber device connected to the network as a listener, due to the video image display and recognition unit, is switched to the mode of scanning the specified code, and after detecting such a code in the camera's field of view, it is recognized and read information, after which the procedure for connecting to the network takes place. If the subscriber device is based on the Android OS, the nearest connection search module is activated, which works according to the Nearby Connections standard, which allows you to detect mesh networks within the communication radius and log in to them using the previously transferred keys. If the subscriber device is based on the iOS OS, the nearest connections search module is activated, which works according to the Multipeer Connectivity standard, which allows you to connect to the mesh network within the communication radius formed by other iOS devices and log in to them using the previously transmitted keys, and it also searches for networks using WiFi Aware technology, which allows you to authorize an iOS device in a network formed by subscriber Android devices. After authorization in the network, the subscriber device polls other devices authorized in the network to identify the device that is the source of the audio signal, as well as to identify two devices with the maximum level of connectivity with this device to form an internal network topology built in the form of a graph, which is necessary to avoid disconnection due to sudden disconnection from the network of one of its other participants. During the polling of devices, synchronization of the current time code is also carried out, which is necessary for further transmission and playback of streaming audio broadcasting. Broadcasting is carried out from one device, the audio stream on which is converted using the h.256 codec into a bit-by-bit set of information, which is then split into separate packets, which also includes the checksum and time code of the record fragment; packets are broadcast over the network to all subscriber devices. Devices whose connected nodes are devices other than the broadcaster's device request information from the devices connected to them and thus also have access to the transmitted information. Due to the checksum, it is possible to avoid the situation of doubling the received packets, and the time code information makes it possible to restore an audio stream from digital information, which is then played back on the subscriber device.
Аналогичным образом по сети за счет блока приема-передачи данных передается служебная и пользовательская текстовая информация, но вместо кодека h.256, который не подходит для обработки данного типа данных, используется шифрование с помощью алгоритма base64, что позволяет снизить нагрузку на сеть за счет уменьшения объема передаваемой информации. Similarly, service and user text information is transmitted over the network due to the data receiving and transmitting unit, but instead of the h.256 codec, which is not suitable for processing this type of data, base64 encryption is used, which reduces the load on the network by reducing amount of transmitted information.
Один из абонентов в сети назначается работать в качестве центральной (базовой) станции. С помощью центральной станции осуществляют управление доступом в канал для остальных абонентов сети, являющихся абонентскими станциями. При этом радиообмен между абонентскими станциями ведется через центральную станцию по способу множественного доступа с временным разделением (МДВР): канал связи делится на временные кадры, которые, в свою очередь, разделяются на временные интервалы (слоты), где станциям сети разрешается передавать и принимать информацию. Формирование временного кадра происходит в центральной станции. Общая схема работы данного алгоритма представлена на Фиг. 3. One of the subscribers in the network is assigned to work as a central (base) station. With the help of the central station, access to the channel is controlled for the rest of the network subscribers, which are subscriber stations. In this case, radio exchange between subscriber stations is carried out through the central station using the time division multiple access (TDMA) method: the communication channel is divided into time frames, which, in turn, are divided into time intervals (slots), where network stations are allowed to transmit and receive information . The temporary framing takes place at the central station. The general scheme of operation of this algorithm is shown in Fig. 3.
Центральная станция периодически опрашивает зарегистрированные абонентские станции. Процедура опроса состоит в том, что центральная станция открывает служебные каналы для зарегистрированных абонентских станций и ожидает ответов на служебные пакеты опроса. При наличии у абонентской станции информации для передачи (запросы на открытие канала от подключенного к абонентской станции оборудования и т. д.) она передает их в открытом служебном канале перед ответом на служебный пакет опроса. Если у абонентской станции нет информации для передачи, она передает центральной станции пакет ответа на опрос. The central station polls the registered subscriber stations periodically. The polling procedure consists in that the central station opens service channels for registered subscriber stations and waits for responses to polling service packets. If available at information to be transmitted to the subscriber station (requests to open a channel from equipment connected to the subscriber station, etc.), it transmits them in an open service channel before responding to the polling service packet. If the subscriber station has no information to transmit, it sends a poll response packet to the central station.

Claims

Формула изобретения Claim
Система для потокового вещания на смартфоны, содержащая блок отображения и распознавания видеоизображения и соединенный с ним блок приема передачи данных, причем блок отображения и распознавания видеоданных соединён с дисплеем и видеокамерой смартфона и выполнен с возможностью вывода QR-кода на дисплей или распознавания QR-кода, расшифровки содержащейся в нем информации и передачи в блок приема- передачи данных, при этом блок приема-передачи данных соединен с приемо- передающей антенной, динамиком и микрофоном смартфона и выполнен с возможностью обработки информации, полученной от блока отображения и распознавания видеоизображения, на основе которой производится получение и передача к другим устройствам сети пакетов данных, содержащих, по меньшей мере, аудиоданные и тайм-коды, а также вывода аудиоданных в динамик смартфона. A system for streaming broadcasting to smartphones, comprising a video image display and recognition unit and a data transmission receiving unit connected to it, wherein the video data display and recognition unit is connected to the smartphone display and video camera and is configured to display a QR code on the display or recognize a QR code, decoding the information contained therein and transferring it to the data receiving-transmitting unit, while the data receiving-transmitting unit is connected to the receiving-transmitting antenna, speaker and microphone of the smartphone and is configured to process information received from the video image display and recognition unit, on the basis of which receiving and transmitting data packets containing at least audio data and time codes to other devices of the network, as well as outputting audio data to the speaker of the smartphone.
PCT/RU2020/000348 2020-07-16 2020-07-16 System for audio streaming on smartphones WO2022015188A1 (en)

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US20150178721A1 (en) * 2013-12-20 2015-06-25 Cellco Partnership D/B/A Verizon Wireless Dynamic generation of quick response (qr) codes for secure communication from/to a mobile device
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