KR102174360B1 - Method for providing of streamming service and apparatus for the same - Google Patents

Abstract

The present invention relates to a streaming service providing method, and more particularly, when providing a streaming service of an MMT packet to a terminal according to a first streaming transmission method, switching to a second streaming transmission method according to cell control information of the terminal to provide a streaming service It relates to a method for providing a streaming service and an apparatus for the same.
To this end, a method for providing a streaming service according to an embodiment of the present invention includes the steps of: a streaming server providing a streaming service of a first streaming transmission method to the terminal according to the request of the terminal, and the streaming server provides cell control information for the terminal. If it is determined that the step of monitoring and the cell control information for the terminal exceeds a preset condition, the streaming server switches from the first streaming transmission method to the second streaming transmission method, and then the converted second streaming transmission method. Accordingly, it may be accomplished including the step of providing a streaming service.

Description

Streaming service providing method and device therefor {METHOD FOR PROVIDING OF STREAMMING SERVICE AND APPARATUS FOR THE SAME}

The present invention relates to a streaming service providing method, and more particularly, when providing a streaming service of an MMT packet to a terminal according to a first streaming transmission method, switching to a second streaming transmission method according to cell control information of the terminal to provide a streaming service It relates to a method for providing a streaming service and an apparatus for the same.

The content described in this section merely provides background information on the present embodiment and does not constitute the prior art.

Recently, with the improvement of the performance of terminals such as smart phones and the development of mobile communication technology, users can access a web server provided by a content provider (CP) through a terminal anytime, anywhere, and provide photos, videos, and audio. It has become possible to use various contents such as, applications, etc.

In particular, in online video services such as VOD (Video On Demand) and Live Streaming, music streaming, file uploading and file download, large-capacity content transmission is becoming more frequent. However, in a mobile network using limited resources, if all sessions are processed in a unicast manner, it is impossible to provide smooth service due to the limitations of network resources.

Therefore, various efforts have been attempted to solve this problem, but there is a problem in that it is difficult to apply the service because it is impossible to quickly change the transmission method in the case of the current TCP-based streaming service.

On the other hand, MPEG-2 TS (Transport System) has been mainly used for media transmission in various industries such as terrestrial and satellite digital broadcasting, DMB, and IPTV since standardization. Recently, media storage in digital video cameras or Blu-ray equipment has been The field of use is expanding, such as being used for. However, the recent network environment is rapidly changing, and new requirements such as multimedia transmission technology in various heterogeneous network environments are required. Accordingly, a new technology standard for providing various contents and services in various types of advanced network environments is required, and accordingly, MPEG Media Transport (MMT) technology is being developed.

Korean Patent Application Publication No. 2011-0119229, published on November 2, 2011 (Name: P2P live streaming system and method for high-definition media broadcasting)

The present invention has been proposed to solve the above-described conventional problem, and when the streaming service of the MMT packet is provided to the terminal according to the first streaming transmission method, the streaming service is switched to the second streaming transmission method according to the cell control information of the terminal. An object of the present invention is to provide a streaming service providing method and an apparatus for the same.

However, the object of the present invention is not limited to the above object, and other objects that are not mentioned will be clearly understood from the following description.

A method for providing a streaming service according to an embodiment of the present invention for achieving the above-described object includes: providing, by a streaming server, a streaming service of a first streaming transmission method to the terminal according to the request of the terminal; Monitoring, by the streaming server, cell control information for the terminal; And when it is determined that the cell control information for the terminal is equal to or greater than a preset condition, the streaming server switches from the first streaming transmission method to a second streaming transmission method, and then provides a streaming service according to the switched second streaming transmission method. Providing step; may be made including.

In this case, the first streaming transmission method may be a unicast transmission method, and the second streaming transmission method may be a multicast transmission method.

In addition, the cell control information may be received through an extension header of an MPEG Media Transport (MMT) message.

In addition, the cell control information may include information on a modulation coding scheme together with identification information of a cell to which the terminal is currently connected.

In addition, the providing of the streaming service according to the second streaming transmission method includes: calculating, by the streaming server, the efficiency of a resource block based on the cell control information; And if the streaming server determines that the efficiency of the calculated resource block is greater than or equal to a specific value, after switching from the first streaming transmission method to a second streaming transmission method, the streaming service is provided according to the converted second streaming transmission method. It can be accomplished including;

In addition, in order to provide a streaming service according to the second streaming transmission method, the streaming server requests to provide a streaming service to a broadcast/multicast service center (BMSC) that controls the second streaming transmission method. Step to do; And when a session connection for multicast transmission with the terminal is completed by the broadcast/multicast service center, the streaming server streams according to the second streaming transmission method via the broadcast/multicast service center. It may include; providing a service.

In addition, after the step of providing a streaming service according to the second streaming transmission method, if the streaming server has cell control information for the terminal less than a preset condition, the second streaming transmission method is used as the first streaming transmission method. After conversion, providing a streaming service according to the converted first streaming transmission method; may be performed further including.

Additionally, the present invention can provide a computer-readable recording medium in which a program for executing the method as described above is recorded.

In addition, the present invention can provide a computer program stored in a computer-readable recording medium by implementing the method as described above.

The streaming server according to an embodiment of the present invention for achieving the above-described object provides a streaming service to a terminal through the first communication network when connected to a first communication network supporting a unicast transmission method. Streaming module; A second streaming module connected to a second communication network supporting a multicast transmission method and providing a streaming service to the terminal through the second communication network; And support to provide a streaming service to the terminal through the first streaming module, and if it is determined that the condition exceeds a preset condition by monitoring the cell control information of the terminal, the first streaming transmission method is switched to the second streaming transmission method. And a switching determination module for requesting the second streaming module to provide a streaming service according to the converted second streaming transmission method.

At this time, the switching determination module checks the serial number of the last MMT (MPEG Media Transport) packet transmitted to the terminal through the first streaming module, and then transmits the confirmed serial number of the MMT packet to the second streaming module, The MMT packet after the MMT packet may be streamed and transmitted to the terminal.

According to the streaming service providing method and apparatus therefor of the present invention, when the streaming server provides the streaming service of the MMT packet to the terminal according to the first streaming transmission method, the streaming service is switched to the second streaming transmission method according to the cell control information of the terminal. By providing, it is possible to provide a more efficient streaming service by adaptively changing the transmission method according to the cell environment of the terminal.

In addition, various effects other than the above-described effects may be directly or implicitly disclosed in the detailed description according to an embodiment of the present invention to be described later.

1 is a block diagram showing a main configuration of a streaming system according to an embodiment of the present invention.
FIG. 2 is a block diagram showing a main configuration of a terminal according to an embodiment of the present invention shown in FIG. 1.
3 is an exemplary diagram illustrating a process of generating cell control information according to an embodiment of the present invention.
4 is a block diagram showing the main configuration of a streaming server according to an embodiment of the present invention shown in FIG.
5 to 7 are exemplary diagrams for explaining the structure of an MMT packet according to an embodiment of the present invention.
8 is a flowchart illustrating a method of providing a streaming service according to an embodiment of the present invention.
9 is a data flow diagram illustrating a method for providing a streaming service according to an embodiment of the present invention.
10 is an exemplary diagram illustrating a method of providing a streaming service according to an embodiment of the present invention.

In order to clarify the features and advantages of the problem solving means of the present invention, the present invention will be described in more detail with reference to specific embodiments of the present invention shown in the accompanying drawings.

However, in the following description and the accompanying drawings, detailed descriptions of known functions or configurations that may obscure the subject matter of the present invention will be omitted. In addition, it should be noted that the same components throughout the drawings are indicated by the same reference numerals as much as possible.

The terms or words used in the following description and drawings should not be construed as being limited to their usual or dictionary meanings, and the inventor may appropriately define the concept of terms for describing his or her invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that there is. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention, and thus various alternatives that can be substituted for them at the time of application It should be understood that there may be equivalents and variations.

In addition, terms including ordinal numbers such as first and second are used to describe various elements, and are only used for the purpose of distinguishing one element from other elements, and to limit the elements. Not used. For example, without departing from the scope of the present invention, a second component may be referred to as a first component, and similarly, a first component may be referred to as a second component.

In addition, when a component is referred to as being "connected" or "connected" to another component, it means that it is logically or physically connected or can be connected. In other words, it should be understood that a component may be directly connected or connected to another component, but another component may exist in the middle, or may be indirectly connected or connected.

In addition, terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In addition, terms such as "comprises" or "have" described herein are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification. It is to be understood that the above other features, or the possibility of the presence or addition of numbers, steps, actions, components, parts, or combinations thereof, are not preliminarily excluded.

In addition, embodiments within the scope of the present invention include computer-readable media having or transferring computer-executable instructions or data structures stored in the computer-readable media. Such computer-readable media may be any available media accessible by a general purpose or special purpose computer system. By way of example, such computer readable media may be in the form of RAM, ROM, EPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage, or computer executable instructions, computer readable instructions, or data structures. It may include, but is not limited to, physical storage media such as any other media that may be used to store or deliver certain program code means, and may be accessed by a general purpose or special purpose computer system. .

In the description and claims that follow, a “network” or “communication network” is defined as one or more data links that enable the transfer of electronic data between computer systems and/or modules. When information is transmitted or provided to a computer system through a network or other (wired, wireless, or a combination of wired or wireless) communication connection, this connection can be understood as a computer-readable medium. Computer-readable instructions include, for example, instructions and data that cause a general purpose computer system or a special purpose computer system to perform a specific function or group of functions. Computer-executable instructions may be, for example, assembly language, or even binary, intermediate format instructions such as source code.

In addition, the present invention relates to a personal computer, a laptop computer, a handheld device, a multiprocessor system, a microprocessor-based or programmable consumer electronics, a network PC, a minicomputer, a mainframe computer, a mobile phone, a PDA, a pager. It can be implemented in a network computing environment having various types of computer system configurations including (pager) and the like.

The invention may also be practiced in a distributed system environment where both local and remote computer systems linked through a network with a wired data link, a wireless data link, or a combination of wired and wireless data links perform tasks. In a distributed system environment, program modules may be located in local and remote memory storage devices.

Prior to describing the embodiments of the present invention, it is assumed that the technical background of the present invention is MPEG MMT (MPEG Media Transport) technology. However, this is only an example for convenience of description, and the present invention is not necessarily applied to MMT technology.

Hereinafter, the meaning of the terms described in the present specification may be defined as follows.

A content component or media component is defined as a media of a single type or a subset of the media of a single type, for example , A video track, movie subtitles, or an enhancement layer of video.

Content is defined as a set of content components, and may be, for example, a movie or a song.

Hybrid delivery is defined as one or more content components being simultaneously transmitted through one or more physically different types of networks.

Presentation is defined as an operation performed by one or more devices so that a user can experience one content component or one service (eg, watch a movie).

A service is defined as one or more content components transmitted for presentation or storage.

Service information is defined as metadata describing one service, characteristics of the service, and components.

Non-timed data defines all data elements consumed without specifying time. Non-timed data is data that does not have unique synchronization information for decoding and/or representation of its media unit.

Timed data is data carrying unique synchronization information for decoding and/or representation of its media unit, and defines a data element associated with a specific time to be decoded and presented.

A Media Fragment Unit (MFU) is a general container independent of any specific codec and accommodates encoded media data that can be independently consumed by a media decoder. The access unit AU includes one file for media data or non-timed media data that can be independently decoded by a media decoder, such as all or part of the access unit AU for timed media data. This has a size smaller than or equal to the access unit (AU) and accommodates information that can be used in the transport layer.

The MMT entity is an implementation of software or hardware that follows the MMT profile.

An MMT packet is a formatted unit of data generated or consumed according to the MMT protocol.

The MMT payload is a formatted unit of data that carries a package or signals a message using an MMT protocol or an Internet application layer transport protocol (for example, there is a Real-Time Transport Protocol (RTP)).

The MMT protocol is an application layer transport protocol for delivering an MMT payload through an IP network.

The MMT payload format is a format for a payload of an MMT package or MMT message to be delivered by an MMT protocol or an Internet application layer protocol (eg, RTP).

Hereinafter, a main configuration of a system according to an embodiment of the present invention will be first described.

1 is a block diagram showing a main configuration of a streaming system according to an embodiment of the present invention.

First, referring to FIG. 1A, the streaming system of the present invention includes a terminal 100, a streaming server 200, and a content providing server 300. In addition, it may be configured to include a first communication network 410 and a second communication network 420 that support the streaming service communication between the terminal 100, the streaming server 200, and the content providing server 300.

The terminal 100 refers to a device of a user capable of transmitting and receiving various data through a communication network according to a user's request. The terminal 100 may perform voice or data communication, and may request a streaming service from the streaming server 200 to receive the requested streaming service. At this time, the terminal 100 of the present invention connects to the streaming server 200 via the first communication network 410 as indicated by ①, and is transmitted from the streaming server 200 according to the first streaming transmission method. Data may be received through the first communication network 410.

In addition, the terminal 100 of the present invention may receive the streaming data transmitted from the streaming server 200 according to the second streaming transmission method through the second communication network 420 as indicated by ②.

In order to perform the above-described process, the terminal 100 of the present invention first confirms a streaming service request for a specific content from a user. The streaming service request for the specific content may be made by inputting a URL (Uniform Resource Locator) or the like that requests a specific content from a user through a browser or the like. Thereafter, the terminal 100 accesses a name server such as a DNS (Domain Name Server) to obtain address information (IP address) of the streaming server 200 that provides a streaming service for the corresponding content. Then, the terminal 100 may receive and use the content from the streaming server 200 in a screaming method. The terminal 10 of the present invention may request an MPEG media transport, that is, content in the form of an MMT packet, and may receive and reproduce the content in the form of an MMT packet. In addition, the MMT packets are sequentially received in a streaming format, and the terminal 100 may reproduce and process the MMT packets sequentially received in a streaming format.

In order to perform the above-described process, the terminal 100 of the present invention may include a browser for transmitting and receiving information, a memory for storing programs and protocols, and a microprocessor for calculating and controlling by executing various programs.

The streaming server 200 is for providing various contents such as photos, videos, audio, applications, etc. to the terminal 100 in a streaming method, and is a content provider (CP), that is, a content providing server ( 300) is provided with at least one content and managed, and a streaming service may be provided to a plurality of terminals 100 through a communication network. In particular, the streaming server 200 of the present invention is capable of configuring an MMT packet, and plays a role of transmitting the MMT packet to the terminal 100 according to the request of the terminal 100. In other words, when the content provided by the content providing server 300 is configured in a general packet format, the streaming server 200 converts the packet provided by the content providing server 300 into an MMT packet, and then converts the converted MMT. Packets can be provided to the terminal 100 in a streaming method.

In particular, the streaming server 200 according to an embodiment of the present invention may provide a streaming service to the terminal 100 in a first streaming transmission method according to the request of the terminal 100 accessed through the first communication network 410. I can. And the streaming server 200 of the present invention periodically checks the cell control information for the first communication network 410, and if the cell control information is above a preset condition, the second streaming transmission method is switched after switching to the second streaming transmission method. Streaming service is provided to the terminal 100 via the second communication network 420 according to the method.

Here, the first communication network 410 refers to a unicast network, and the second communication network 420 refers to a multicast network.

The first communication network 410 and the second communication network 420 will be described in more detail with reference to FIG. 1B.

1A and 1B, the communication network of the present invention can be implemented as a multi-cell transmission network, and a plurality of base stations in charge of radio resource management and radio channel setup for radio transmission with a plurality of terminals 100 Evolved Packet Core (EPC) that controls packet services by interworking with multiple Access Networks (not shown) and multiple Access Networks, including (not shown), and in charge of transmitting and receiving traffic with an external network (e.g., Internet network) ) Can be composed of. Here, the access network is a subscriber network capable of transmitting and receiving data with the terminal 100 through various communication methods such as wired or wireless, and a plurality of base stations such as BS (Base Station), BTS (Base Transceiver Station), NodeB, eNodeB, etc., It may be implemented with a base station controller such as a base station controller (BSC) or a radio network controller (RNC).

In addition, EPC refers to an operator's backbone network that can connect multiple access networks and perform call processing, mobility control, traffic control, and switching, and refers to a device for managing and controlling packet flow in the network. . This EPC may manage mobility between frequencies, and may play a role for traffic management and interworking between networks or other networks. The EPC of the present invention may be configured to include a plurality of switching devices.

Such a communication network may be configured to include a first communication network 410 and a second communication network 420 according to a streaming transmission method, and the first communication network 410 may support a unicast communication method, and a second communication network ( 420) may support a multicast communication scheme.

First, the first communication network 410 refers to a network capable of using a streaming service according to a unicast communication method, and includes a first wireless network 410a and a first transmission network 410b. The first wireless network 410a receives uplink signals transmitted from a plurality of terminals 100 at a physical layer level, and transmits downlink signals to the corresponding terminals 100. That is, the base station (not shown) transmits and receives signals to and from the terminal 100 and serves as an access point of the terminal 100.

The first transmission network 410b refers to a core network that manages service control and traffic paths for general packet data services, and includes Mobility Management Entity (MME) 416, Serving Gateway (SGW) 417, and PGW (PDN). Gateway) can be configured to include (418).

The second communication network 420 refers to a network capable of using a streaming service according to a multicast communication method, and includes a second wireless network 420a and a second transmission network 420b. The second wireless network 410b may include substantially the same physical structure as the first wireless network 410a. The first wireless network 410a and the second wireless network 410b described in the present invention have the same physical structure but are logically classified, and the second wireless network 420b is used to process a multicast communication method. It manages radio resources, allocates channels, and sets up multicast bearers.

In addition, the second transmission network 420b includes the configuration of the first transmission network 410b, and in the configuration of the first transmission network 410b, MBMS (Multimedia Broadcast/Multicast Service) 421, BMSC (Broadcast Multicast Service Center) It includes the same component as 422, and interlocks with the second radio network 420a for session management and mobility management radio bearer setup for each service.

The first transmission network 410a and the second transmission network 420b are shown separately for convenience of explanation, and the transmission network may be shown as a single core network, and the MME 416, SGW 417, and PGW 418 ) Provides a unicast bearer function, and MBMS 421 and BMSC 422 may provide a multicast bearer function.

Meanwhile, the BMSC 422 is a node in charge of controlling the MBMS 421 and is a component that must exist in order to provide a multicast service to the terminal 100. The BMSC 422 becomes the subject of management and control for the MBMS 421 and provides a function of preparing multicast and delivering service information to the terminal 100. In addition, the BMSC 422 provides a function of planning and delivering the MBMS 421 service user and service information management, multicast bearer service authorization, service initiation, and MBMS information transmission.

The interface between the BMSC 422 and the MBMS 421 uses an IP interface used when the MBMS 421 is connected to an external Internet network. The BMSC 422 serves as an entry point for the streaming server 200 to deliver MBMS information, and may itself serve as a content provider (CP).

In addition, the MBMS 421 performs a session control (service start/end) function and may transmit streaming data to a base station (not shown) of the second transmission network 420a according to an IP multicast transmission method. The MBMS 421 may be connected to the MME 416 of the first transmission network 410b through the Sm interface for exchanging control messages for the session, and for interworking with the base station (not shown) of the second wireless network 420a. It can be connected through the M1 interface.

In addition, the BMSC 422 and MBMS 421 may be referred to as eBMSC and eMBMS when implemented in an LTE network.

The terminal 100 of the present invention of such a communication network requests streaming data transmission to the streaming server 200 via the first wireless network 410a and the first transmission network 410b. The streaming server 200 may provide streaming data in a unicast transmission method to the terminal 100 via the first transmission network 410b and the first wireless network 410a. In the meantime, when the cell control information received from the terminal 100 exceeds a preset condition, the streaming server 200 checks the serial number of the last transmitted streaming data, and then starts the second transmission network 420b and the second transmission network. It may be provided to the terminal 100 via the wireless network 420a in a multicast transmission method. At this time, the first wireless network 410a and the second wireless network 420b are classified based on a radio bearer setting, and the first wireless network 410a and the second wireless network 420b are physically one wireless network. The first transmission network 410b and the second transmission network 420b are constituent elements constituting one core network, and the element processing the unicast transmission method is referred to as the first transmission network 410b and A unique component that processes the cast transmission method is referred to as a second transmission network 420b. In this case, it should be noted that the second transmission network 420b is a logical division including components of the first transmission network 410b.

The content providing server 300 refers to a third-party provider server that holds and manages content, and may refer to an origin server. The content providing server 300 is implemented as a web server or a web application server (WAS), and, for example, a broadcasting station headend device such as a professional baseball relay broadcast or a World Cup broadcast broadcast through the terminal 100 It refers to a device that holds broadcast data transmitted from (not shown). In addition, the content providing server 300 may directly provide content to the terminal 100 according to the request of the terminal 100, and to provide the content to the terminal 100 according to the streaming service according to an embodiment of the present invention. If so, content is provided to the terminal 100 by interlocking with the streaming server 200 supporting this.

A more specific method of providing a streaming service according to an embodiment of the present invention will be described later, and a processor mounted in the terminal 100 and the streaming server 200 according to the embodiment of the present invention is used for executing the method according to the present invention. Can process program commands. In one implementation example, the processor may be a single-threaded processor, and in another implementation example, the processor may be a multithreaded processor. Furthermore, the processor is capable of processing instructions stored in a memory or a storage device.

In addition, the streaming service described herein refers to providing content such as audio or video in a streaming method. Here, the streaming method is a technology that transmits and plays files together to reduce waiting time and is not limited by the storage capacity of the receiver. Such streaming can be divided into VOD streaming, which provides stored content according to a user's request, and live streaming, which broadcasts content data at a predetermined time. The streaming service described herein may preferably be a live streaming service, but is not necessarily limited to the above structure.

Hereinafter, the main configuration and operation method of the terminal 100 according to an embodiment of the present invention will be described.

FIG. 2 is a block diagram showing a main configuration of a terminal according to an embodiment of the present invention shown in FIG. 1.

1 and 2, a terminal 100 according to an embodiment of the present invention includes a communication unit 110, an input unit 120, a control unit 130, a storage unit 140, and an output unit 150. Can be configured.

To describe each component in more detail, first, the communication unit 110 may support a process of accessing a communication network. For example, the communication unit 110 searches for a base station (not shown) located within a certain radius, requests access to the searched base station (not shown), and supports the process of being connected to the base station (not shown) to access the access network. have. Here, the process of connecting the communication unit 110 of the terminal 100 to a base station (not shown) of an access network may employ various known configurations, and thus a detailed description thereof will be omitted. In addition, when the communication unit 110 performs a communication procedure with a base station (not shown), user information may be transmitted. Basically, a terminal identification number such as IMSI (International Mobile Subscriber Identity), etc. can be transmitted to a base station (not shown), and while the base station (not shown) performs an access procedure with the core network, the terminal identification number, etc. Subscriber information can be checked. In addition, when the connection to the communication network is completed, the communication unit 110 according to an embodiment of the present invention requests the streaming server 200 to transmit an MMT packet, and transmits the transmitted MMT packet to the controller 130. Is done.

In particular, the communication unit 110 according to an embodiment of the present invention includes a first communication module 111 and a second communication module 112. The first communication module 111 serves to transmit the streaming data transmitted from the streaming server 200 to the controller 130 according to the first streaming transmission method. The second communication module 112 may process a conversion process in the first communication module 111 in order to process streaming data transmitted from the streaming server 200 according to the second streaming transmission method. For example, in setting a bearer for unicast communication, a process such as setting a bearer for multicast communication may be performed. In addition, the second communication module 112 may serve to transmit the streaming data transmitted from the streaming server 200 to the controller 130 according to the second streaming transmission method.

In addition, the first communication module 111 according to an embodiment of the present invention may transmit various cell control information generated when connected to a wireless network to the streaming server 200.

The above process will be described with reference to FIG. 3.

3 is an exemplary diagram illustrating a process of generating cell control information according to an embodiment of the present invention.

First, referring to (a) of FIG. 3, the access network of the present invention is installed in each of a plurality of cells divided into a service target area in units of communication coverage, and wireless access and data with the terminal 100 located in the communication coverage of the cell. It may be configured to include a base station device 411 that performs transmission and reception. At this time, one cell 415 means a macro cell, and includes a macro base station apparatus 411. And, as shown in (b) of FIG. 3, one macro cell 415 may include a plurality of pico cells, and one pico cell includes one pico base station apparatus 412. However, it is not limited to the above structure, and the access network of the present invention may be configured to include a relay or other type of cell.

In this case, the terminal 100 of the present invention may periodically transmit and receive signals with the base station device in the pico cell and the macro cell. Accordingly, the communication unit 110 of the terminal 100 may periodically check cell control information such as a pico cell ID or macro cell ID to which it is currently connected, and a modulation coding scheme (MCS). Thereafter, the communication unit 110 of the terminal 100 transmits the checked cell control information to the streaming server 200 according to the instruction of the controller 130.

At this time, the communication unit 110 according to an embodiment of the present invention may transmit the cell control information to the streaming server 200 in the form of an MMT packet, and at this time, including the cell control information through an extension header of the MMT message. It can be transmitted to the streaming server 200. To this end, the streaming server 200 of the present invention may define this so that the cell control information can be recorded in the extended header of the MMT packet message.

In addition, the base station device defined in the present invention includes a radio unit (RU) in charge of processing a radio signal, and a data processing unit (DU) that performs data processing according to a communication protocol by converting a radio signal into digital data. : Digital Unit). The wireless transceiver is also referred to as a remote radio head (RRH), and the data processing device is also referred to as a base band unit (BBH). The wireless transmission/reception unit RU and the data processing unit DU may be integrally implemented in the same place, or may be separately constructed in a remote location by connecting through an optical cable or cable.

The input unit 120 transmits various information such as number and text information input from a user, various function settings, and signals input in connection with function control of the terminal 100 to the controller 130. In particular, the input unit 120 of the present invention may support a user input for a request to transmit an MMT packet. For example, it is possible to support input of execution of an application capable of reproducing an MMT packet from a user, and input of selection command information for a specific channel through the application.

As described above, the input unit 120 includes a key input means such as a keyboard or a keypad, a touch input means such as a touch sensor or a touch pad, a voice input means, a gyro sensor, a geomagnetic sensor, an acceleration sensor and a proximity sensor, and a camera. It may also include a gesture input means including at least one or more.

In addition, all types of input means currently under development or that may be developed in the future may be included.

The controller 130 performs overall control of the terminal 100, and in hardware, at least one processor including a CPU (Central Processing Unit) and an execution memory (eg, a register and / Or a random access memory (RAM)) and a bus for inputting/outputting at least one or more data to and from the processor and memory. In addition, in order to perform a function defined in the terminal 100 in software, a predetermined program routine or program data loaded from a predetermined recording medium into the execution memory and processed by the processor may be included. . In other words, among the functions provided in the terminal 100 to process the process of requesting and receiving an MMT packet from the streaming server 200 according to an embodiment of the present invention, the controller 130 controls components that can be processed by software. It can be judged by the function of ).

The controller 130 of the present invention is functionally connected to at least one or more components provided for processing MMT packet request and reproduction according to an embodiment of the present invention. That is, the control unit 130 is functionally connected to the communication unit 110, the input unit 120, the storage unit 140, and the output unit 150, and provides power to the respective components and the flow of signals for performing functions. Control.

In particular, the control unit 130 according to an embodiment of the present invention may support an MPEG-2 TS processing function capable of processing MPEG media transport streaming data. For example, it is possible to receive an MMT packet composed of a plurality of media processing units (MPUs) transmitted from the streaming server 200, and when the MMT packet is composed of a plurality of assets, the plurality of assets are synchronized according to time information. You can perform the function to reproduce and output.

In addition, the control unit 130 according to an embodiment of the present invention includes a first streaming processing module 131 and a second streaming processing module 132 and plays the streaming data transmitted according to the first streaming transmission method or Streaming data transmitted according to the streaming transmission method can be played.

In this case, the first streaming processing module 131 may reproduce streaming data transmitted according to a unicast transmission method, and may generate cell control information during the reproduction of the streaming data and transmit it to the streaming server 200.

In addition, the second streaming processing module 132 confirms that the conversion to the streaming transmission method occurs by the streaming server 200, and accordingly, changes the radio resource setting and performs an operation such as performing bearer setting. have. In addition, the second streaming processing module 132 checks the serial number of the Majikman MMT packet received by the first streaming processing module 131, and then the serial number of the streaming data MMT packet transmitted according to the second streaming transmission method. It is possible to check whether there is a lost MMT packet by comparing with, and if there is a lost MMT packet, a process such as requesting it to the streaming server 200 may be performed.

The storage unit 140 may temporarily store various data generated during execution of the application program, including an application program required for a functional operation according to an exemplary embodiment of the present invention. In particular, the storage unit 140 according to an embodiment of the present invention may store various commands for processing an MMT packet request and reproduction according to an embodiment of the present invention.

The storage unit 140 may largely include a program area and a data area. The program area stores information related to driving the terminal 100 such as an operating system (OS) that boots the terminal 100. The data area is an area in which data generated according to the use of the terminal 100 is stored, and as described above, various commands for processing streaming data may be stored. The storage unit 140 includes a flash memory, a hard disk, a multimedia card micro type memory (eg, SD or XD memory, etc.), a RAM, a ROM ( It may be configured to include a storage medium such as ROM).

The output unit 150 displays information about a series of operation states and operation results that occur while the terminal 100 is performing a function. In particular, the output unit 150 of the present invention may display information generated by reproducing the MMT packet transmitted from the streaming server 200.

As described above, the output unit 150 may be implemented in the form of a single touch panel (or touch screen) together with the input unit 120, and when implemented together with the input unit 120, the user's touch operation Various information generated according to the display can be displayed.

In addition, the output unit 150 of the present invention as described above is an LCD (Liquid Crystal Display), TFT-LCD (Thin Film Transistor LCD), OLED (Organic Light Emitting Diodes), light emitting diodes (LED), AMOLED (Active Matrix). Organic LED), a flexible display, and a three-dimensional display. In addition, some of these displays may be configured as a transparent type or a light-transmitting type so that the outside can be seen through them. This may be configured in the form of a transparent display including TOLED (Transparant OLED).

As described above, main components of the terminal 100 have been described with reference to FIG. 2. However, not all of the components shown through FIG. 2 are essential components, and the terminal 100 may be implemented by more components than the shown components, and the terminal 100 is reduced by fewer components. It can also be implemented. For example, the terminal 100 may be configured to further include a sound source output unit (not shown) that converts and outputs a sound source, which is an electrical signal, into an analog signal, and this sound source output unit (not shown) is the streaming server 200 Various information generated when reproducing an MMT packet transmitted from an MMT packet may be output.

In addition, it goes without saying that the positions of major components of the terminal 100 shown through FIG. 2 may be changed for convenience or other reasons.

The main configuration and operation method of the terminal 100 according to the embodiment of the present invention have been described above. The terminal 100 described in this specification is a user equipment (User Equipment), a mobile station (Mobile Station, MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (Portable Subscriber Station). , PSS), Access Terminal (AT), and the like, and may include all or part of functions such as a mobile terminal, a subscriber station, and a mobile subscriber station. In addition, the terminal 100 is not only a mobile terminal such as a smart phone, a tablet PC, a personal digital assistant (PDA), a portable multimedia player (PMP), but also a smart TV. A fixed terminal such as a TV) or a desktop computer may be used.

In the terminal 100 of the present invention, the transformation of the portable device is very diverse according to the convergence trend of the digital device, so it is not possible to enumerate all of them, but the unit of the same level as the above-mentioned units is the terminal according to the present invention. It may be used as 100, and any device can be applied to the terminal 100 of the present invention as long as it is a device capable of processing the MMT packet transmitted from the streaming server 200.

Hereinafter, a main configuration and operation method of the streaming server 200 according to an embodiment of the present invention will be described.

4 is a block diagram showing the main configuration of a streaming server according to an embodiment of the present invention shown in FIG.

1 and 4, the streaming server 200 according to an embodiment of the present invention may include a server communication unit 210, a server control unit 220, and a server storage unit 230.

The server communication unit 210 serves to support transmission and reception of information with the terminal 100. For example, the server communication unit 210 may receive a streaming service request from the terminal 100 and provide a streaming service to the terminal 100 in response thereto. In this case, the server communication unit 210 may receive the MMT packet request from the terminal 100 and transmit the MMT packet to the terminal 100 in response thereto. In particular, the server communication unit 210 according to an embodiment of the present invention can provide a streaming service to the terminal 100 according to the first streaming transmission method by the server control unit 220 to be described later, and according to the second streaming transmission method. A streaming service may be provided to the terminal 100. The first streaming transmission method described in the present invention refers to a unicast transmission method, and the second streaming transmission method refers to a multicast transmission method.

In addition, the server communication unit 210 of the present invention for this purpose may be configured to include a first server communication module 211 and a first server communication module 212, and the first server communication module 211 is 1 may be connected to the PGW 418 of the transmission network 410b, and the second server communication module 212 may be connected to the BMSC 422 of the second transmission network 420b of FIG. 1B.

The server control unit 220 is configured to perform overall control of the streaming server 200 according to an embodiment of the present invention, and includes a monitoring module 221, a switching determination module 2220, and a streaming processing module 223 Can be.

The monitoring module 221 monitors information transmitted from the terminal 100 via the server communication unit 210 and transmits the information to the switching determination module 222 or the streaming processing module 223. For example, the monitoring module 221 transmits the information transmitted from the terminal 100 via the server communication unit 210 to the streaming processing module 223 if it is for a request to provide a streaming service for a specific content. On the other hand, if the information transmitted from the terminal 100 through the server communication unit 210 is cell control information of the terminal 100, it is transmitted to the switching determination module 222.

The switching determination module 222 may determine a streaming method transmitted to the terminal 100 according to the cell control information. In other words, in a state in which the first streaming module 223a of the streaming processing module 223 provides the streaming service to the terminal 100 according to the first streaming transmission method at the request of the terminal 100, the terminal 100 ) When the cell control information for) is equal to or greater than a preset condition, the second streaming module 223b, not the first streaming module 223a of the streaming processing module 223, is transferred to the streaming processing module 223 You can request to provide a streaming service to (100). To this end, the switching determination module 222 of the present invention calculates a resource block (RB) processed by the terminal 100 in the same cell according to the cell control information transmitted from the terminal 100, and the RB If it is more than a preset reference value, it may be requested to provide a streaming service according to the second streaming method.

In this regard, the LTE communication method will be described as an example. A mobile communication system such as LTE improves system performance by utilizing AMC that adaptively determines a data transmission rate according to a channel condition. AMC maintains a constant reception success rate in consideration of the channel conditions experienced by the terminal among a plurality of data transmission rates defined by a plurality of modulation methods and data amount, and selects the highest data transmission rate that can be received and transmits it to the corresponding terminal 100. Means to do.

MCS Index Modulation Order TRS Index TBS Size Spectral Efficiency 0 2 0 152 0.140741 One 2 One 208 0.192593 2 2 2 256 0.237037 3 2 3 328 0.303704 4 2 4 408 0.377778 5 2 5 504 0.466667 6 2 6 600 0.555556 7 2 7 712 0.659259 8 2 8 808 0.748148 9 2 9 936 0.866667 10 4 9 936 0.866667 11 4 10 1032 0.955556 12 4 11 1192 1.103704 13 4 12 1352 1.251852 14 4 13 1544 1.42963 15 4 14 1736 1.607407 16 4 15 1800 1.666667 17 6 15 1800 1.666667 18 6 16 1928 1.785185 19 6 17 2152 1.992593 20 6 18 2344 2.17037 21 6 19 2600 2.407407 22 6 20 2792 2.585185 23 6 21 2984 2.762963 24 6 22 3240 3 25 6 23 3496 3.237037 26 6 24 3624 3.355556 27 6 25 3752 3.474074 28 6 26 4392 4.066667 29 2 reserved 30 4 31 6

Table 1 above defines the MCS (Modulation Coding Schem) level described in LTE. In the LTE mobile communication system, 29 MCS levels are defined, and each MCS index is defined as a modulation order and a transport block size. Transport block size corresponds to the size of the amount of information transmitted in a given bandwidth, and its unit is bits. That is, in <Table 1>, MCS index 28 means that a total of 4392 bits are transmitted in a bandwidth of 6RB (180kHz*6=1080kHz). Modulation order refers to the number of bits carried in one modulation symbol when each transmitted modulation method is applied. In addition, the LTE mobile communication system can perform data transmission/reception using QPSK, 16QAM, and 64QAM for modulation orders 2, 4, and 6. In general, the higher the modulation order, the more data can be transmitted, but there is also a disadvantage that a higher received signal energy-to-noise and interference ratio is required. In particular, the 256QAM 540 can support sufficient reception performance only at a very high reception signal energy-to-noise and interference ratio.

For a more specific example, it is assumed that cell control information transmitted from a first terminal, a second terminal, and a third terminal currently providing a streaming service is as follows.

Terminal Cell control information RB number Subscriber 1 Watch MCS 16QAM, KBS2 10 things Subscriber 2 Watch MCS 32QAM, KBS2 5 pieces Subscriber 3 Watch MCS QPSK, KBS2 20 pcs

The switching determination module 222 calculates a resource block (RB) processed by the terminal 100 in the same cell according to the cell control information transmitted from the terminal 100, and the RB is equal to or greater than a preset reference value. The terminal of subscriber 3 is transmitted to the streaming processing module 223 to switch from the first streaming method to the second streaming method.

The streaming processing module 223 provides a streaming service to the terminal 100 according to a streaming method, and may be configured to include a first streaming module 223a and a second streaming module 223b as shown in the drawing. have. Here, the first streaming module 223a provides content according to the first streaming transmission method. In addition, the second streaming module 223b provides content according to the second streaming transmission method. Here, the first streaming transmission method refers to a unicast method, and the second streaming transmission method refers to a multicast method.

In addition, the first streaming module 223a second streaming information on the last transmitted content according to the request of the switching determination module 222 while providing content to the terminal 100 according to the first streaming method. Transfer to the module 223b, the second streaming module 223b may transfer the content after the content to the terminal 100. In this case, the content may be streamed in the form of an MMT packet and transmitted to the terminal 100.

The server storage unit 230 may perform a role of storing and managing various types of information required to perform an operation of the streaming server 200 according to an embodiment of the present invention.

The main configuration and operation method of the streaming server 200 according to an embodiment of the present invention have been described above.

The streaming server 200 according to an embodiment of the present invention has the same configuration as a typical web server or network server in terms of hardware. However, in terms of software, a program module implemented through a language such as C, C++, Java, Visual Basic, and Visual C is included.

Meanwhile, a memory mounted in each device of the present invention stores information within the device. In one implementation, the memory is a computer-readable medium. In one implementation, the memory may be a volatile memory unit, and in another implementation, the memory may be a non-volatile memory unit. In one implementation, the storage device is a computer-readable medium. In various different implementations, the storage device may include, for example, a hard disk device, an optical disk device, or some other mass storage device.

In addition, the term'~module' used in an embodiment of the present invention refers to a software component, and'~module' performs certain roles. As an example,'~module' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, properties, procedures, and sub It includes routines, segments of program code, drivers, data, databases, data structures, tables, arrays, and variables. In addition, the components and functions provided in the'~modules' may be combined into a smaller number of components and'~modules' or further separated into additional components and'~modules'.

Although the present specification and drawings describe exemplary device configurations, the functional operations and implementations of the subject described in this specification may be implemented with other types of digital electronic circuits, or the structures disclosed herein and structural equivalents thereof. The included computer software, firmware, or hardware may be implemented, or a combination of one or more of them may be implemented. Implementations of the subject matter described in this specification are one or more computer program products, that is, one relating to computer program instructions encoded on a tangible program storage medium for execution by or for controlling the operation of a device according to the invention. It can be implemented as the above module. The computer-readable medium may be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of materials that affect a machine-readable radio wave signal, or a combination of one or more of them.

Hereinafter, a method of providing a streaming service according to an embodiment of the present invention will be described.

Prior to the description, a method of configuring an MMT packet for providing a streaming service according to an embodiment of the present invention will be described first.

5 to 7 are exemplary diagrams for explaining the structure of an MMT packet according to an embodiment of the present invention.

5 to 7 are exemplary diagrams for logically explaining the structure of an MMT packet according to an embodiment of the present invention. First, FIG. 5 shows the MMT package 550 as described above, among data models defined in the MMT functional domain. As the largest MMT entity structured as, it means one independent content such as a movie. The streaming server 200 providing the streaming data service may generate such an MMT package and provide it to the terminal 100, and the MMT package 550 may be a logically structured collection composed of a collection of several entities. . The MMT package 550 may include one or more assets 560, presentation information 551, transport characteristics 553, and descriptive information, such as package information 501.

Among them, the presentation information 551 includes information on a relationship between a plurality of assets 560, that is, a spatial and temporal relationship, and one content is a plurality of MMT packages In case of consisting of, information for indicating a relationship between a plurality of MMT packages may be further included. The presentation information 551 may be a combination of a hypertext markup language (HTML) and a composition information document as an example of the presentation information 551.

A transport characteristic (ADC; Asset Delivery Characteristics, 553) represents a QoS (Quality of Service) request and statistics for the delivery of the asset 560. A plurality of assets 560 may be related to one transport characteristic 553. At this time, the transport characteristics (transmission characteristics) 553 may be used to set parameters of the MMT payload and MMT protocol by the entity encapsulating the package for effective delivery of the asset 560. In addition, the transport characteristic 553 may include delivery characteristic information necessary to determine the delivery condition of the MMT asset 560 or the MMT packet, for example, a traffic description parameter and QoS. May include a QoS descriptor. This transmission characteristic information may be expressed in the form of a parameter independent of the communication network environment.

The asset 560 refers to an element of a package that encapsulates encoded media data such as audio, video, or web page data having a timed or non-timed property, and means the largest logical data unit. Such an asset 560 refers to a data entity that includes data with the same transmission characteristics. For example, if the MMT package 550 is the largest entity among the data models defined in the MMT functional area and means one independent content such as a movie, the asset 560 is audio data, video data, and script data. Refers to a data unit constituting the MMT package 550, such as. This asset 560 logically groups MPUs that share the same asset ID.

In addition, the MMT packet of the present invention may substantially include an MMT packet header and an MMT payload.

Referring to FIG. 6, the MMT packet is composed of an MMT packet header and an MMT payload 570, as described above, and the MMT payload 570 is an MMT payload header 571 and MMT payload data. It can be composed of (572).

Here, the MMT payload 570 including the MMT payload header 571 and MMT payload data 572 is a media processing unit (MPU; Media Processing) constituting the asset 560 which is a logical structure of the MMT package. Unit, hereinafter to be referred to as MPU). Here, the MPU may be a comprehensive container for timed or non-timed data independent of any specific media codec. This MPU is encoded media data that can be completely and independently processed, and processing of the MPU may mean encapsulation to a package or packetization for delivery. Such an MPU may include one or more access units for timed data. Here, the access unit (AU) is the smallest data entity that can have time information. Further, the MPU may be configured to include a portion of data without access unit boundaries for non-timed data. This MPU is a coded media data unit that can be completely and independently processed, and the MMT payload 570 that can be expressed as such an MPU is a MMT payload header 571 and coded MMT payload data 572. The MMT payload data 572 may be composed of a plurality of MFUs 580. Here, the MFU 580 may be further composed of a plurality of media fragment units (MFU; Media Fragment Unit, hereinafter referred to as MFU), and the MFU 570 is an MFU header 581 and MFU data 582 Can be configured.

In addition, when the MMT payload 570 of the present invention is described in more detail with reference to FIG. 7, the MMT payload header 571 includes an extension header (header_extension, 601) field as shown in FIG. 7A. Are doing. The extended header field includes user-defined information. The header extension mechanism enables applications and media types that require additional information carried in the payload format header, for proprietary extensions to the payload format. The header extension mechanism is designed in such a way that it can be discarded without affecting the correct processing of the MMT package. The extended header included in the extended header field may have a structure as shown in FIG. 7B. Here, the streaming server 200 according to an embodiment of the present invention configures an MMT packet so that cell control information can be inserted into an extension header value (header_extenstion_value, 603) among the extension header 601 fields shown in FIG. 7B. .

Accordingly, the terminal 100 may record cell control information in the extended header of the MMT signaling message according to the MMT packet configuration method of the streaming server 200, and do not add or define a separate field for recording cell control information. Even if not, cell control information can be easily provided to the streaming server 200 by using an existing field.

In consideration of these points, a method of providing a streaming service according to an embodiment of the present invention will be described.

8 is a flowchart illustrating a method of providing a streaming service according to an embodiment of the present invention.

1 and 8, the streaming server 200 of the present invention receives a streaming service request from the terminal 100 (S101). Accordingly, the streaming server 200 provides a streaming service to the terminal 100 according to the first streaming transmission method (S103). Here, the first streaming transmission method means a unicast transmission method, and the streaming server 200 streams the MMT packet according to the unicast transmission method and transmits the stream to the terminal 100. The unicast transmission method has the advantage of being able to provide the requested content only to the corresponding terminal 100, but it may be inefficient when the same information is to be transmitted to many terminals 100.

Accordingly, the streaming server 200 monitors the cell control information for the terminal 100 (S105). Here, the cell control information is transmitted from the terminal 100, and in this case, the cell control information may be recorded in an extension header of an MMT message. To this end, the streaming server 200 checks if the cell control information is included in the extended header of the MMT message, and determines whether the cell control information is equal to or greater than a preset condition (S107).

If it is determined that there are multiple terminals 100 requesting the same content in the same cell where the terminal 100 is located (S107), the streaming server 200 switches from the first streaming transmission method to the second streaming transmission method (S109). ), a streaming service is provided according to the converted second streaming transmission method (S111). Here, the second streaming transmission method means a multicast transmission method, and the streaming server 200 streams a subsequent MMT packet according to the multicast transmission method and transmits the stream to the terminal 100. In this case, the streaming server 200 of the present invention registers users through the BMSC 422 and MBMS 421 of the second transmission network 420b as shown in FIG. 1B in order to transmit streaming data in a multicast transmission method. You can perform a series of procedures such as Subscription), Joining (session participation), and Leaving (service suspension).

In other words, the streaming server 200 requests a multicast service session connection to the BMSC 422 of the second transmission network 420b, and the BMSC 422 receives the MBMS service information to the terminal 100 in the corresponding region. It provides a list of available services and detailed information.

And when a request to receive a multicast service from the terminal 100 is registered in the BMSC 422, the BMSC 422 transmits the streaming data transmitted under the control of the streaming server 200 via the MBMS 421 and the access network. It may be transmitted to a plurality of terminals 100 in the service area through a common channel used in the service area.

The streaming data of the multicast transmission method provided from the streaming server 200 is broadcast multicast data and is distributed by links of sub-nodes below the MBMS 421 under the control of the BMSC 422 according to the broadcasting schedule for each service. It may be transmitted to the terminal 100 through the tree.

Hereinafter, a method for providing a streaming service according to an embodiment of the present invention as described above will be described in more detail.

9 is a data flow diagram illustrating a method of providing a streaming service according to an embodiment of the present invention, and FIG. 10 is an exemplary view illustrating a method of providing a streaming service according to an embodiment of the present invention.

Prior to the description, the streaming server 200 of the present invention is configured to include a first streaming module 223a supporting a first streaming transmission method and a second streaming module 223b supporting a second streaming transmission method. Although described as an example, each of the modules may exist as an independent server.

Referring to FIG. 9, the terminal 100 requests a streaming service for a specific content to the streaming server 200 via a first communication network 410 according to a user's request (S201). For example, the streaming server 200 may request a live streaming service for a specific broadcast channel provided by the streaming server 200, and the streaming service request at this time may be an HTTP GET/REQEUST message of the HTTP protocol method. Further, the first communication network 410 may mean a general mobile communication network that transmits and receives information according to a unicast transmission method.

The first streaming module 223a, which is a basic streaming module of the streaming server 200 receiving this, provides a streaming service to the terminal 100 in a first streaming method (S203). Here, the first streaming transmission method means a unicast transmission method, and the first streaming module 223a of the streaming server 200 may stream the MMT packet according to the unicast transmission method and transmit the MMT packet to the terminal 100.

Thereafter, the first streaming module 223a periodically receives cell control information for the terminal 100 from the terminal 100 through the first communication network 410 (S205). Exactly, the process is operated by the monitoring module 223 and the switching determination module 222 described with reference to FIG. 4, but in FIG. 6, for convenience of explanation, it is assumed that the first streaming module 223a performs the function. Let me explain.

In addition, the first streaming module 223a may determine whether the cell control information transmitted from the terminal 100 is equal to or greater than a preset condition while providing the streaming service to the terminal 100 (S207). In other words, the first streaming module 223a of the present invention calculates the RB for each channel according to the cell control information transmitted from the terminal 100, and if the calculated RB is greater than or equal to a preset condition, the second streaming It is guided to the module 223b (S209). At this time, the first streaming module 223a of the present invention may transmit the serial number of the streaming data, for example, the MPU serial number, that it has finally provided to the terminal 100 to the second streaming module 223b.

Upon receiving this, the second streaming module 223b streams the MMT packet after the MPU serial number according to the second streaming transmission method and provides it to the terminal 100 (S211). In this case, the second streaming module 223b may transmit the streaming data to the terminal 100 by using the second communication network 420 supporting a multicast communication method.

In addition, the terminal 100 may perform processes such as channel change and bearer setup for reproducing streaming data transmitted according to a multicast communication method (S213), and may support a process of reproducing the received streaming data ( S215 to S217).

In the above process, the second streaming module 223b of the streaming server 200 supports the terminal 100 and the multicast transmission method before transmitting the streaming data according to the multicast transmission method to the terminal 100. A process of requesting to establish a multicast session between the second communication networks 420 is supported. In other words, the second streaming module 223b notifies the streaming data transmission to the BMSC 422 of the connected second communication network 420, and the terminal 100 within a certain channel is registered as a multicast user under the control of the BMSC 422. If so, the BMSC 422 can multicast and provide streaming data to a plurality of terminals 100 registered in the corresponding area.

This method of the present invention can be more effective when a plurality of terminals request the same content in a specific cell. That is, as shown in FIG. 10, when MMT streaming data for the same channel is provided to three terminals 100 in the same cell in a unicast transmission method, MMT streaming data must be provided individually, but from a specific point in time. By switching to a multicast method and simultaneously transmitting MMT streaming data for the same channel, it is possible to provide a more efficient MMT streaming service.

In addition, according to the present invention, by using the MMT packet, the first streaming module 223a transmits only the MPU serial number to the second streaming module 223b when the transmission method is switched, thereby enabling seamless continuous streaming service use.

In the above, a method of providing a streaming service according to an embodiment of the present invention has been described.

The streaming service providing method of the present invention as described above may be provided in the form of a computer-readable medium suitable for storing computer program instructions and data. A program recorded on a recording medium for implementing a method for providing a streaming service according to an embodiment of the present invention includes, by a streaming server, providing a streaming service of the first streaming transmission method to the terminal at the request of the terminal, the streaming server Monitoring the cell control information for the terminal and if it is determined that the cell control information for the terminal is equal to or greater than a preset condition, the streaming server switches from the first streaming transmission method to the second streaming transmission method and then switches The step of providing a streaming service may be performed according to the second streaming transmission method.

Such computer-readable media suitable for storing computer program commands and data include, for example, magnetic media such as hard disks, floppy disks, and magnetic tapes, and compact disk read only memory (CD-ROM). , Optical Media such as DVD (Digital Video Disk), Magneto-Optical Media such as Floptical Disk, and ROM (Read Only Memory), RAM (RAM) , Random Access Memory), flash memory, EPROM (Erasable Programmable ROM), and EEPROM (Electrically Erasable Programmable ROM). The processor and memory can be supplemented by special purpose logic circuits or incorporated into it.

In addition, the computer-readable recording medium is distributed over a computer system connected through a network, so that computer-readable codes can be stored and executed in a distributed manner. In addition, a functional program for implementing the present invention, and related codes and code segments, etc., are programmers in the technical field to which the present invention pertains in consideration of the system environment of a computer that reads the recording medium and executes the program. May be easily inferred or modified by

In addition, the computer program recorded in the computer-readable recording medium as described above includes instructions for performing the functions as described above, and is distributed and distributed through the recording medium to be read, installed and executed on a specific device or a specific computer. As a result, the above-described functions can be executed.

Here, in order for the computer to read the program recorded on the recording medium and execute the functions implemented as the program, the above-described computer program is a C, C++ program that can be read by the computer's processor (CPU) through the computer's device interface. , JAVA, machine language, etc. may include a code for a program instruction coded in a computer language.

This code may include a functional code related to a function defining the above-described functions, and may include a control code related to an execution procedure necessary for the processor of the computer to execute the above-described functions according to a predetermined procedure. In addition, these codes may further include additional information necessary for the processor of the computer to execute the above-described functions, or code related to a memory reference to which location (address address) of the internal or external memory of the computer should be referenced. . In addition, when the computer's processor needs to communicate with any other computer or server in a remote in order to execute the above-described functions, the code is used by the computer's processor using the computer's communication module. It may further include a communication-related code for how to communicate with other computers or servers, and what information or media should be transmitted and received during communication.

While this specification includes details of a number of specific implementations, these should not be construed as limiting to the scope of any invention or claim, but rather as a description of features that may be peculiar to a particular embodiment of a particular invention. It must be understood. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented in a plurality of embodiments individually or in any suitable sub-combination. Furthermore, although features operate in a particular combination and may be initially described as so claimed, one or more features from a claimed combination may in some cases be excluded from the combination, and the claimed combination may be a subcombination. Or sub-combination variations.

Likewise, although operations are depicted in the drawings in a specific order, it should not be understood that such operations must be performed in that particular order or sequential order shown, or that all illustrated operations must be performed in order to obtain a desired result. In certain cases, multitasking and parallel processing can be advantageous. In addition, separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the program components and systems described are generally integrated together into a single software product or packaged in multiple software products. You should understand that you can.

The present invention relates to a streaming service providing method, and more particularly, when providing a streaming service of an MMT packet to a terminal according to a first streaming transmission method, switching to a second streaming transmission method according to cell control information of the terminal to provide a streaming service It relates to a method for providing a streaming service and an apparatus for the same.

According to the present invention, there is an excellent effect that a streaming service can be provided by adaptively changing a transmission method according to a network environment of a terminal, and this can contribute to the development of the streaming service industry.

In addition, the present invention is not only sufficiently commercially available or commercially possible, but also has industrial applicability because it can be implemented clearly in reality.

100: terminal 110: communication unit
120: input unit 130: control unit
140: storage unit 150: output unit
200: streaming server 210: server communication unit
220: server control unit 221: monitoring module
222: switching pandan module 223: streaming processing module
230: server storage unit 410: access network
420: backbone network 430: internet network
300: content providing server

Claims (11)

Providing, by a streaming server, a streaming service of a first streaming transmission method to the terminal according to the request of the terminal;
Monitoring, by the streaming server, cell control information for the terminal; And
If it is determined that the cell control information for the terminal is equal to or greater than a preset condition, the streaming server switches from the first streaming transmission method to the second streaming transmission method, and then provides a streaming service according to the switched second streaming transmission method. Step to do;
Streaming service providing method comprising a. The method of claim 1,
The first streaming transmission method is a unicast transmission method,
The second streaming transmission method is a streaming service providing method, characterized in that the multicast (Multicast) transmission method. The method of claim 1,
The cell control information is
A streaming service providing method, characterized in that it is received through an extension header of an MPEG Media Transport (MMT) message. The method of claim 1,
The cell control information is
The method for providing a streaming service, comprising information on a modulation coding scheme together with identification information of a cell to which the terminal is currently connected. The method of claim 1,
Providing a streaming service according to the second streaming transmission method comprises:
Calculating, by the streaming server, efficiency of a resource block based on the cell control information; And
If the streaming server determines that the efficiency of the calculated resource block is greater than or equal to a specific value, the streaming service is provided according to the converted second streaming transmission method after switching from the first streaming transmission method to the second streaming transmission method. step;
Streaming service providing method comprising a. The method of claim 1,
In order to provide a streaming service according to the second streaming transmission method, the streaming server requesting to provide a streaming service to a broadcast/multicast service center (BMSC) that controls a second streaming transmission method. ; And
When a session connection for multicast transmission with the terminal is completed by the broadcast/multicast service center, the streaming server passes through the broadcast/multicast service center to provide a streaming service according to the second streaming transmission method. Providing a;
Streaming service providing method comprising a. The method of claim 1,
After the step of providing a streaming service according to the second streaming transmission method,
If the streaming server has the cell control information for the terminal less than a preset condition, switching from the second streaming transmission method to the first streaming transmission method and then providing a streaming service according to the switched first streaming transmission method ;
Streaming service providing method comprising a further. A computer-readable recording medium on which a program for executing the method according to any one of claims 1 to 7 is recorded. A computer program implemented to execute the method according to any one of claims 1 to 7 and stored in a computer-readable recording medium. A first streaming module for providing a streaming service to a terminal through the first communication network when connected to a first communication network supporting a first streaming transmission method;
A second streaming module connected to a second communication network supporting a second streaming transmission method and providing a streaming service to the terminal through the second communication network; And
Supports providing a streaming service to the terminal through the first streaming module, and if it is determined that the condition is higher than a preset condition by monitoring cell control information for the terminal, the first streaming transmission method is switched to the second streaming transmission method. A switching determination module for requesting the second streaming module to provide a streaming service according to the converted second streaming transmission method;
Streaming server comprising a. The method of claim 10,
The switching determination module
After checking the serial number of the last MMT (MPEG Media Transport) packet transmitted to the terminal through the first streaming module, the serial number of the confirmed MMT packet is transmitted to the second streaming module, and the MMT after the MMT packet Streaming server, characterized in that controlling so that the packet is streamed and transmitted to the terminal.

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