KR20170111217A - Method for providing of multi path streamming service, computer readale storage medium and recording program therefor - Google Patents

Abstract

The present invention relates to a method of providing a streaming service, and more particularly, to a method and apparatus for providing a streaming service by providing a multi-path streaming service capable of providing a streaming service through a multi- And a method for providing a multi-path streaming service using the signaling message.
A method for providing a multi-path streaming service in a streaming system comprising a plurality of MMT objects operating according to an MPEG Media Transport (MMT) communication protocol according to an embodiment of the present invention, Generating a signaling message including an MP table defining a media processing unit (MPU) location information and an MPU ID (MPU_id) for a package that the mobile terminal holds; And transmitting the MMT entity to one or more other MMT entities such that the MMT entity can provide a multi-path streaming service using the generated signaling message.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-path streaming service providing method, a computer readable recording medium,

The present invention relates to a method of providing a streaming service, and more particularly, to a method and apparatus for providing a streaming service by providing a multi-path streaming service capable of providing a streaming service through a multi- A service providing method, a computer readable recording medium therefor, and a computer program.

The contents described in this section merely provide background information on the present embodiment and do not constitute the prior art.

Recently, various video services have appeared in the Internet environment, and demand for high definition live broadcasting is increasing. In addition, in recent years, attempts have been made to provide various video services according to a live streaming service method.

A streaming service means transmitting content such as video or audio from a server to a terminal over a network such as the Internet. The transmitted data is called streaming if it is treated as though water is flowing. The server divides the video into packets so that it can be sent to the network, and the terminal collects the packets and restores them to their original form and plays back the packets. At this time, playback and packet reception occur at the same time, a series of related packets is called a stream, and a set of packets is called streaming data.

MPEG-2 TS (Transport System) has been used for media transmission in various industrial fields such as terrestrial and satellite digital broadcasting, DMB, and IPTV since standardization. In recent years, media storage in digital video cameras and Blu- And its use is expanding. However, the recent network environment is rapidly changing, and new requirements such as multimedia transmission technology in various heterogeneous network environments are required. Accordingly, there is a need for a new technology standard for providing various contents and services in various types of network environments. Accordingly, attempts have been made to develop an MMT (MPEG Media Transport) technology and provide an MMT streaming service It is being done.

However, the current MMT technology does not have a guideline for an operation method and a technique for implementing a multi-path service, and the current MMT standard requires that one asset is transmitted through one path It is assumed that they are all delivered, and there is a problem that the network bandwidth can not be efficiently used.

Accordingly, in the MMT-based streaming service, it is necessary to implement a multi-path service that can use the network bandwidth more efficiently and define a message for the service.

Korean Patent Laid-Open Publication No. 2013-0057404, published on May 31, 2013 (titled "Method and Apparatus for Streaming Service Providing Scalability and View Information)

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-mentioned problems of the prior art. In particular, it is an object of the present invention to provide a method and apparatus for providing a streaming service in an MPEG media transport (MMT) A method for providing a path streaming service, a computer readable recording medium therefor, and a computer program.

In particular, the present invention relates to a method for providing a multi-path streaming service capable of more efficiently providing a multi-path streaming service in consideration of a network structure of a server-client scheme or a peer-to-peer (P2P) And a computer program.

The present invention also provides a method of providing a multi-path streaming service capable of newly defining a signaling message used in a MMT streaming service provision process and providing a multi-path streaming service using a defined signaling message, And a computer program.

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

There is provided a method of providing a multi-path streaming service in a streaming system comprising a plurality of MMT objects operating according to an MPEG Media Transport (MMT) communication protocol according to an embodiment of the present invention to achieve the above-mentioned object (MP table) defining a media processing unit (MPU) location information and an MPU ID (MPU_id) for a package that the MMT entity has in its own Generating a signaling message; And transmitting the signaling message to one or more other MMT entities such that the MMT entity can provide a multi-path streaming service using the generated signaling message.

At this time, the MPU location information is defined depending on the asset location information, and the MPU ID includes a packet ID (packet_id) in a location type (location_type) defined in the MMT general location information (MMT_general_location_info Lt; / RTI > is defined.

There is provided an MMT streaming server for providing an MPEG media transport (MMT) streaming service according to an embodiment of the present invention to achieve the above-mentioned object, and an MMT streaming server for providing a streaming service between a client using the streaming service and the MMT streaming server A method for providing a multi-path streaming service in a streaming system including a plurality of MMT intermediate entities which can be provided with all or a part of the same package as a package provided by the MMT streaming server according to an MMT communication protocol Wherein each of the plurality of MMT intermediate entities shares information related to a package they own via a signaling message through a signaling message; Setting an MMT intermediate entity of the plurality of MMT intermediate entities as a coordinator MMT intermediate entity based on the shared signaling message; Generating a signaling message to be transmitted from the MMT streaming server to the client according to a request of the client, the signaling message corresponding to at least two or more multipaths using the shared signaling message; And the coordinator MMT intermediate entity transmits the generated at least two signaling messages to the client so that the client can request and receive the MMT streaming service according to the signaling message.

Herein, the information related to the package refers to a media processing unit (MPU) location information and an MPU ID (MPU_id), and the signaling message includes an MP table in which the MPU location information and MPU ID are defined MP table).

The sharing step may include transmitting a signaling message including information related to a package held by each of the plurality of MMT intermediate entities to an upper MMT intermediate entity located in an upward direction of the MMT streaming server step; And transmitting the signaling message including the signaling message transmitted from the lower MMT intermediate entity and the information related to the package held by the upper MMT entity in the upward direction of the MMT streaming server.

At this time, in the step of setting as the coordinator MMT intermediate entity, the entity located in the upward direction of the MMT streaming server may set the highest-level MMT intermediate entity, which is an MMT streaming server, as the coordinator MMT intermediate entity.

In addition, the generating may be performed by the coordinator MMT intermediate entity, using the shared signaling message, to transmit at least some of the information related to the package described in the MP table of the signaling message transmitted from the MMT streaming server, Generating a first signaling message in which the corresponding information is deleted from the MP table if it is determined that an intermediate entity exists; And generating a second signaling message in which the coordinator MMT intermediate entity deletes the remainder excluding the same information from the MP table of the signaling message transmitted from the MMT streaming server.

At this time, in the step of generating the second signaling message, the coordinator MMT intermediate entity deletes the remainder excluding the same information from the MP table of the signaling message transmitted from the MMT streaming server, and then transmits the source address of the signaling message src_addr ) To the address of the MMT intermediate entity having the same package, and generates a second signaling message in which the destination port (dst_port) of the signaling message is set as another destination port.

In order to achieve the above object, there is provided an MMT streaming server for providing an MPEG media transport (MMT) streaming service according to an exemplary embodiment of the present invention and a multi- A method of providing a streaming service, the method comprising: requesting a package from one of the clients to the MMT streaming server; Receiving a signaling message from the MMT streaming server, the signaling message including information about one or more other clients holding at least a portion of the package; The client connecting with at least one of the other clients included in the signaling message considering the available channel capacity; And simultaneously requesting and receiving streaming data from another client to which the client is connected.

At this time, the received signaling message may include information on the IP address of the client, the IP address of another client, the package ID corresponding to each of the other clients, one or more asset IDs, and at least one MPU ID.

In addition, the step of connecting to another client may include: calculating a current channel usage of a peer and a maximum channel capacity of a peer; And the client can perform a connection with a different client until the capacity of the maximum channel capacity minus the current channel usage is less than a channel margin for reliability.

In addition, after the client performs a connection with another client, the client continuously monitors its current channel usage and maximum channel capacity, and if a change in the current channel usage is detected, the current channel usage and maximum channel capacity And a step of delivering the property to the customer.

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

Further, the present invention can be distributed through a computer program stored on a computer-readable recording medium which is implemented to carry out the method as described above.

According to the method of providing a multi-path streaming service of the present invention, a computer-readable recording medium and a computer program therefor, it is possible to provide a multi-path streaming service by providing a streaming service It is possible to provide a streaming service more quickly.

In addition, according to the present invention, a streaming service providing unit can provide a streaming service in units of MPU instead of an asset when providing a multi-path streaming service, so that network resources can be used more efficiently, Streaming service can be provided considering various network structures.

In addition, according to the present invention, it is possible to provide a service of the present invention by utilizing a conventional MMT streaming system without newly implementing a system for providing a streaming service by newly defining and using a signaling message used in the MMT streaming service providing process .

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

FIG. 1 is a schematic view illustrating a system to which a multi-path MMT streaming service providing method according to an embodiment of the present invention is applied.
2 is an exemplary diagram illustrating an MMT packet structure according to an embodiment of the present invention.
3 is a view for explaining an MMT signaling message according to an embodiment of the present invention.
4 is a block diagram illustrating a method of providing a multi-path streaming service according to the first embodiment of the present invention.
5 is a flowchart illustrating a method of providing a multi-path streaming service according to the first embodiment of the present invention.
6 is a data flow chart for explaining a method of providing a multi-path streaming service according to the first embodiment of the present invention.
7 is a block diagram illustrating a method for providing a multi-path streaming service according to a second embodiment of the present invention.
FIG. 8 is a flowchart illustrating a method of providing a multi-path streaming service according to a second embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS For a more complete understanding of the nature and advantages of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings, in which:

In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms and words used in the following description and drawings are not to be construed in an ordinary sense or a dictionary, and the inventor can properly define his or her invention as a concept of a term to be described in the best way It should be construed as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

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

In addition, when referring to an element as being "connected" or "connected" to another element, it means that it can be connected or connected logically or physically. In other words, it is to be understood that although an element may be directly connected or connected to another element, there may be other elements in between, or indirectly connected or connected.

Also, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. It is also to be understood that the terms such as " comprising "or" having ", as used herein, are intended to specify the presence of stated features, integers, It should be understood that the foregoing does not preclude the presence or addition of other features, numbers, steps, operations, elements, parts, or combinations thereof.

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

Hereinafter, the meaning of the terms described in this specification can be defined as follows.

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

Timed data defines data elements associated with a particular time to be decoded and presented as thinning data for inherent synchronization information for decoding and / or presentation of its media unit.

An MMT entity is an implementation of software or hardware that conforms to an MMT profile. Such an MMT entity may be classified into an MMT transmission entity and an MMT receiving entity according to an operation in the system. And an MMT intermediate entity located between the MMT transmission entity and the MMT receiving entity and capable of sending, receiving, or processing necessary information between the MMT transmission and reception.

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 carrying a package or signaling messages using the MMT protocol or the Internet application layer transport protocol (e.g., RTP (Real-Time Transport Protocol)).

The MMT protocol is an application layer transport protocol for delivering MMT payloads over an IP network.

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

Hereinafter, a schematic flow of a method for providing a multi-path MMT streaming service according to an embodiment of the present invention will be described with reference to FIG. 1 and FIG.

FIG. 1 is a schematic view of a system to which a multi-path MMT streaming service providing method according to an embodiment of the present invention is applied, and FIG. 2 is an exemplary view illustrating an MMT structure according to an embodiment of the present invention.

Referring to FIG. 1, the client 100 requests MMT streaming data to the MMT streaming server 500. The client 100 is a device capable of processing the MMT protocol and requests MMT streaming data to the MMT streaming server 500 according to the MMT protocol and receives and plays the MMT streaming data provided from the MMT streaming server 500 It is a device that can.

The client 100 according to the present invention may include a browser for transmitting and receiving information, a memory for storing a program and a protocol, a microprocessor for executing and controlling various programs, and the like. In accordance with the MMT communication protocol, Means an apparatus capable of reproducing and processing MMT streaming data provided from the streaming server 500.

In addition, the client 100 of the present invention can be implemented in various forms according to an embodiment. For example, the client 100 described herein may be a mobile terminal such as a smart phone, a tablet PC, a PDA (personal digital assistant), a portable multimedia player (PMP), and an MP3 player , A smart TV, a desktop computer, etc. may be used.

The client 100 according to the present invention can not enumerate all of the variations of the portable apparatus according to the convergence trend of the digital apparatus. However, it is also possible that the unit equivalent to the above- (100).

The MMT streaming server 500 transmits the MMT streaming data to the client 100, and in the general MMT streaming service, the streaming service is provided on an assert basis. In an MMT package, an asset is an element of a package that encapsulates encoded media data such as audio, video, or web page data with timed or non-timed nature. The MMT package is the logical concept of the MMT, and the asset is the largest logical unit of data in the MMT package. Such an asset means a data object including data with the same transfer characteristic, and one MMT package can be composed of a plurality of assets.

However, in the general MMT streaming service, a streaming service is provided for each of the assets, which makes it difficult to efficiently use the network resources even if it is applied to the multipath scheme. In other words, when one asset having a large data unit is to be transmitted to the client 100 by the MMT streaming server 500, only one path can be occupied and transmitted. Therefore, even if the multi- There is no way to transmit the asset to the client 100 through the network, which results in a decrease in resource efficiency.

Accordingly, the present invention proposes a multi-path MMT streaming service scheme as shown in FIG. 1, and more particularly, to provide a streaming service in a smaller MPU unit than an asset that does not provide a streaming service in units of assets.

The MPU constituting the asset will be described first with reference to FIG. 2A. FIG. 2A shows an asset 600 that constitutes the MMT package, which is the largest logically structured MMT model among the data models defined in the MMT functional area.

The set of one or more assets 600 constitute an MMT package, which includes elements of a package encapsulating encoded media data such as audio, video or web page data with timed or non-timed nature Means a logical unit of data meaning. In particular, asset 600 refers to a data entity that contains data with the same delivery characteristics. For example, if the MMT package 500 is the largest entity among the data models defined in the MMT functional area, then the asset 600 may include audio data, video data, script data And the MMT package.

Such an asset 600 may consist of at least one MPU 660. Herein, the MPU means a logical data object of a media processing unit (MPU). A plurality of MPUs constituting one asset include the same asset ID.

The MPU 660 is packetized in the form of an MMT packet and transmitted. For example, if it is assumed that the HD-level image is 10 Mbps (1.25 MB) and the FHD-level image is 20 Mbps (2.5 MB), and the MMT packet size is equal to the MTU size (1500 KB), one MPU is divided into dozens of packets. One of the packets constituting the MPU 660 is composed of an MMT packet header 610 and MMT packet payload data 620 as shown in FIG. 2B. The MMT packet payload data 620 may include an MMT payload header 630 and an MMT payload data 640. The MPU 660 or the message (Message) 650 may be inserted into the MMT payload data 640.

This MPU 660 may be a comprehensive container for timed or non-timed data that is independent of any particular media codec. The MPU 660 may be encoded media data that can be processed completely and independently, and the processing of the MPU may mean packetization for encapsulation or delivery to a package. In addition, the MPU 660 may include one or more access units for timed data. Herein, an access unit (AU) is the smallest data entity that can have time information. For example, one GOP (Group Of Picture) may be one MPU, and one picture of a GOP may be an MFU have.

The MPU 660 may also be configured to include portions of data that do not have access unit boundaries for non-timed data. This MPU 660 is a coded media data unit that can be processed completely and independently, and each MPU 660 can be configured with an MPU header and coded data. In addition, the MPU 660 of the present invention may further be configured as a Media Fragment Unit (MFU).

These MPUs can be defined for each of the assets, so that MPUs of video containing only video data are created from the assets of the video, and audio MPUs containing only audio data are created from the assets of audio.

The present invention can utilize the limited network resources more efficiently than the streaming service of the asset unit by applying the MPU conforming to the MMT standard as a unit of the streaming service. For example, when a streaming service is provided using the first path and the second path, there is a situation where there is a bandwidth in the first path for transmitting the asset 1 and a bandwidth is insufficient for the second path for transmitting the asset 2 There has been no way to utilize the first path in the conventional method, but the present invention transmits a packet in units of MPU instead of the asset, so that some MPUs constituting the asset 2 are transmitted through the first path instead of the second path It can be transmitted to the client 100, thereby enabling more efficient bandwidth utilization.

In addition, as shown in FIG. 1, MPU sizes can be set differently for each asset, so that an appropriate MPU can be provided for each path in accordance with a bandwidth situation.

The client 100 of the present invention can receive MMT packets in units of MPU as indicated by 700, 710, 720, and 730 through multipath, and can reproduce MMT packets in order to utilize the MMT streaming data do.

In order to provide the multi-path MMT streaming service according to the embodiment of the present invention, a descriptor capable of identifying the MPU in the MMT signaling message is required. In a typical MMT signaling message, there is an MPU timestamp descriptor as a descriptor capable of identifying an MPU, but the descriptor can not independently distinguish between multiple packages and assets. Therefore, in the present invention, a new descriptor capable of distinguishing the MPU in the MMT signaling message format is defined.

First, the MMT signaling message of the present invention will be described.

3 is a view for explaining an MMT signaling message according to an embodiment of the present invention.

3, the MMT signaling message 800 can be divided into messages that can be used to convey information needed for MMT package consumption 810 and package delivery 820, And can be transmitted and received.

In the method of providing a multi-path MMT streaming service according to an embodiment of the present invention, a signaling message necessary for the packet consumption 810 will be described as an example. The Package Consumption 810 signaling message defined in the MMT standard includes a Package Access (PA) message 811 for access control, a Media Presentation Information (MPI) message 812 for presentation control, An MMT Package Table (MPT) message 813, a Clock Relation Information (CRI) message 814, and a Device Capability Information (DCI) message 815 for information .

In the multi-path MMT streaming service providing method according to the embodiment of the present invention, the MPT descriptor of the present invention is defined using the MPT message 813, but it is not limited to the MPT message, An MPU descriptor may be defined using another MMT signaling message. In addition, all of the required signaling tables may be transmitted in the PA message to achieve the minimum channel acquisition delay time, unless using a hierarchical CI transmission or otherwise providing other functions.

In addition, the MMT signaling message is inserted in a table format. When the MPT message includes the MP table, the MP table of the present invention includes MPU_location corresponding to the asset_location newly defined for the embodiment of the present invention and MPU_id for the MMT_general_location_info dependent thereon. This makes it possible to transfer data in units of MPU in the MMT, which can be transferred only in the unit of the asset, and to be more flexible and adaptive to operate.

The MPT message according to an embodiment of the present invention will be described in more detail.

The MPT message according to an embodiment of the present invention provides information for a single package. The hierarchical delivery of one package with hierarchical configuration information may be composed of a plurality of hierarchical MP tables. The layer-0 MP table is a basic MPEG media transmission package table. The MPT message may be defined to include a message ID, a message version, and a message length, and the payload is defined to include an MP table.

Syntax examples of the MP table according to the embodiment of the present invention can be defined as shown in Table 1.

Syntax Value No. of bits Mnemonic MP_table () {
Table_id
Version
Length
Reserved
MP_table_mode
If (table_id == SUBSET_0_MPT_TABLE_ID) {
MMT_package_id {
For (i = 0; i <N; i ++) {
MMT_package_id_byte
}
}
}
Number_of_assets
For (i = 0; i <N3; i ++) {
Idenfitier_mapping ()
Asset_type
Reserved
Asset_clock_relation_flag
If (asset_clock_relation_flag == 1) {
Asset_clock_relation_id
Reserved
Asset_timescale_flag
If (asset_time_scale_flag == 1) {
Asset_timescale
}
}
Asset_location {
Location_count
For (i = 0; i <N6; i ++) {
MMT_general_location_info ()
MPU_location {
For (j = 0; j <N6_1; j ++) {
MMT_general_location_infor ()
}
}
}
Asset_descriptors {
Asset_descriptors_length
For (j = 0; j <N5; j ++) (
Asset_descriptors_byte
}
]
}
}






























N6_1






























32






























uimsbf

In the syntax example of the MP table, a description of the main syntax is as follows. First, table_id denotes an ID of a table. The MP table includes different table identifiers, and each table_id value can be allocated contiguously. For example, the number 0 means a basic MP table, and the numbers 1 through 14 can mean an improved MP table. version indicates the version of the MP table, MMT_package_id indicates a unique identifier allocated globally for each MMT package, and MMT_package_id_byte indicates one byte in the MMT_package_id string. Number_of_assets indicates the number of assets having information provided by the MP table, and asset_clock_relation_flag indicates whether one asset uses a network time clock (NTP) clock or another clock system as a clock reference. If this flag is 1, the asset_clock_relation_id field is included in the next statement, and if this field is 0, the network time protocol clock is used for the asset. asset_timescale_flag indicates whether or not asset_timescale information is provided, and asset_timescale provides information in units of time for all timestamps used for the asset expressed in units of a second.

MMT_general_location_info () for the asset location provides the location information of the asset. Typical MMT_general_location_infor () uses generic location reference information, where only 0x00-0x06 can be allowed for a single asset location. In particular, in the embodiment of the present invention, mpu_location corresponding to asset_location is defined in MMT_general_location_info () and MPU_id is defined for MMT_general_location_info dependent thereon. mpu_location indicates the location information of the MPU, and MPU_id indicates the ID of the MPU.

Table 2 shows a syntax example of MMT_general_location_info () defined according to the embodiment of the present invention. In the description of the main syntax, location_type refers to the type of location information. Here, the type of the location information may be any one of 0x00 to 0x0C. The packet_id means id of the asset, and the MPU_id newly defined by the present invention means the MPU identification information. In particular, the MPU_id of the present invention can be defined only when the packet_id is defined in the location_type. This MPU_id can adopt the hash scheme when a global unique ID is required, and can be implemented with 32 bits if the global unique ID is sufficient.

Also, ipv4_src_addr means an ipv4 source address, and ipv4_dst_addr means a destination address. dst_port means the destination port number. ipv6_src_addr stands for ipv6 source address, and ipv6_dst_addr stands for ipv6 destination address. network_id denotes a broadcast network identifier, MPEG_2_transport_stream_id denotes an MPEG_2 transport stream identifier, and MPEG_2_PID denotes an MPEG_2 packet identifier. URL_length is a byte length of one web page address, URL_byte is one byte in one web page address, and message_id is an MMT signaling message identifier.

As described above, according to the method of providing a streaming service using a multipath according to the embodiment of the present invention, the location information and the ID of the MPU are additionally defined in the MP table and distributed through the MPT message, The MMT entities participating in the service can service the MMT packets on a per MPU basis, so that the network resources can be used more efficiently.

Hereinafter, a method for providing a multi-path streaming service using an MP table and a signaling message defined according to an embodiment of the present invention will be described.

Prior to description, it is assumed that a method of providing a multi-path streaming service according to an embodiment of the present invention can be operated under the following conditions. First, the method of providing a multi-path streaming service of the present invention can operate within the same coverage as a package. That is, the package information understood by the entity (MANE (Media Aware Network Element)) that all the MMT communication constituting the topology understands is the same.

In addition, all MMT entities participating in the MMT communication exchange MPT messages containing MP tables with other MMT entities connected to the MMT entity, thereby exchanging information of the MMT package or a part of the package that the MMT entity owns. Herein, the MPT message is used in the preferred embodiment of the present invention. However, the present invention is not limited to the MPT message, and other signaling messages such as MPI may be used, or a PA message including all information may be used .

As described above, all the MMT entities participating in the MMT communication include an MPT message including the MP table to which the MPU information is added and a Network Abstraction for Media (NAM) feedback message including the network status information of the MMT entity ), It is possible to exchange information with each other and exchange information with each other, so that it is possible to request and process MPU units when a streaming service is provided in a multi-path.

An embodiment of a method of providing a multi-path streaming service according to an embodiment of the present invention will be described.

4 is a block diagram illustrating a method of providing a multi-path streaming service according to the first embodiment of the present invention.

4 is a block diagram illustrating an exemplary embodiment of an MMT server 500 that performs an MMT transmission entity among a MMT entity, a client 100 that performs an MMT receiving entity, A plurality of MMT intermediate entities located in a network structure of a tree structure.

Here, the MMT intermediate entity of the present invention may mean a media-aware network element (NAME) capable of controlling the delivery of MMT packets according to the MMT communication protocol. These NAMEs may include, for example, gateways, multipoint conference units (MCUs), Real-Time Transport Protocol (RTP), translator, RTP mixers, multimedia messaging centers (MMSCs), push- cellular servers, and cache servers. In particular, each of the MMT intermediate objects of the present invention may store all or a portion of the packages possessed by the MMT streaming server 500, and each of these MMT intermediate objects may be an asset or a part thereof The MPT message including the MPU information and the NAMF message are periodically transmitted to the upper intermediate MMT entity for sharing.

In particular, the signaling message sharing process of the MMT intermediate entities of the present invention means sharing in the upward direction. For example, the MMT intermediate entity 6 (360) generates an MPT message including its own MP table and a NAMF message for the network situation, forwards the message to the MMT intermediate entity 5 (350) Generates an MPT message including its own MP table and a NAMF message for a network situation and delivers it to the MMT intermediate entity 1 310, which is an upper MMT intermediate entity. At this time, the MMT intermediate entity 5 350 may accumulate the information transferred from the MMT intermediate entity 6 360 and transmit the accumulated information to the MMT 1 310.

The process of transmitting information between the MMT intermediate entities may be performed periodically and independently of the MMT streaming service request of the client 100. Also, since the MMT intermediate entities are transmitted through the MPT message including only the subset MP table, not the PA messages, the MMT intermediate entities are less likely to be misused when the MMT intermediate entities receive the information. In addition, the MP table can be created as many as the number of packages that the MMT intermediate object has, and can be transferred to the upper MMT intermediate object.

In addition, when the lower-level MMT intermediate entity transmits the MPT message and the NAMF message including the MP table to the upper-level MMT intermediate entity, the information received from the lower-level MMT intermediate entity is accumulated and transmitted to the upper-level MMT intermediate entity. The uppermost MMT intermediate object located at the uppermost position can confirm the information of other MMT intermediate objects located in the network. Using this, the uppermost MMT intermediate object sets an optimal routing path for providing a streaming service, ). ≪ / RTI > The MMT 1 310 shown in the figure plays the role of the highest MMT intermediate entity among other MMT intermediate entities and can know information about all the lower MMT intermediate entities. Accordingly, the MMT 1 310 can act as an optimal coordinator and provide information for providing the MMT streaming data requested by the client 100 to the client 100, ) Can utilize the multi-path streaming service more efficiently.

At this time, the highest-level MMT intermediate entity 1 310 serving as an optimal coordinator can modify and distribute a signaling message delivered from the MMT streaming server 500 to provide an optimal service. That is, the highest-level MMT intermediate entity 1 310 serving as the coordinator transmits the signaling message received from the MMT streaming server 500, preferably a PA of the main path transmitted to the client 100 in the PA message In the case of the included MP table, the MMT intermediate object 310 can delete the location information of a part of the package to be decomposed into sub paths and transmit the PA message received from the MMT streaming server 500 to the sub- And may include the location information of the MPU or the asset for the part excluded from the MP table in the transmission to the MMT entity located in the path. The source address (src_addr) and the destination port (dst_port) may be changed when the location type (location_type) is 0x01 to 0x06. In this case, ipv4_src_addr (ipv6_src_addr) is changed to the IP address of the MMT object of the sub-path, dst_port is set differently from dst_port of the main path, and dst_port value of the main path is set to another sub- coordinator's IP address plus the last digit.

The above process will be described with reference to the flowchart of FIG. 5 and a concrete example.

5 is a flowchart illustrating a method of providing a multi-path streaming service according to the first embodiment of the present invention.

Referring to FIGS. 4 and 5, each of a plurality of MMT intermediate objects configuring the streaming system shares information related to a package thereof with a signaling message as described above (S1101). The sharing process may be performed periodically before the streaming service request of the client 100 is generated, or may be performed after the streaming service request of the client 100 is occasionally generated.

Then, the MMT intermediate entity that performs the role of the coordinator among the plurality of MMT intermediate entities is set based on the shared signaling message (S1103). Although the above process can be performed by the MMT streaming server 500, it is preferable that the uppermost MMT intermediate object confirms that there is no other MMT intermediate object in the upward direction, and then sets itself as the coordinator MMT intermediate object . These coordinator MMT intermediate entities may vary depending on the package held by each MMT intermediate entities. In addition, the coordinator MMT intermediate entity may notify the lower-level MMT intermediate entity and the MMT streaming server 500 that the coordinator MMT intermediate entity performs its role as the coordinator, but it may be omitted. Since the MMT 1 310 shown in FIG. 4 is the highest MMT intermediate entity that does not have another MMT intermediate entity in the upward direction of the MMT streaming server 500, the coordinator MMT intermediate entity can be set.

Thereafter, the MMT intermediate entity 1 310, which is an intermediate entity of the coordinator MMT, transmits a signaling message, which is transmitted from the MMT streaming server 500 to the client 100 according to a request of the client 100, A signaling message corresponding to two or more multipaths may be generated and then transmitted (S1105). For example, if the signaling message transmitted from the MMT streaming server 500, that is, the package-related information included in the PA message, is the MP table for MPU 1, MPU 2, and MPU 3, Since the entity 1 310 already knows the information about the MPU held by the lower MMT intermediate entity, the MPU 2 can confirm that the MMT intermediate entity 320 holds the information. The MMT 1 310 generates and delivers a first signaling message in which the MPU 2 is deleted from the MP table of the signaling message transmitted from the MMT streaming server 500. The MMT intermediate entity 310 transmits the first signaling message And delivers the message to the client 100 without modification. In addition, the signaling message shared in step S1101 may be an MPT message including only the MP table, and the signaling message generated and processed in step S1105 may be a PA message.

The MMT intermediate object 1 310, which is an intermediate entity of the coordinator MMT, sets a sub-path and transmits a signaling message delivered from the MMT streaming server 500 to the MMT intermediate object 2 320, which holds the MPU 2, The second signaling message is set to include only the information about the MPU 2 held by the MMT intermediate entity 2 320, rather than delivering the signaling message received from the MMT streaming server 500 as it is, After the message is generated, it is delivered.

At this time, the MMT intermediate entity 310 changes the source address (ipv4_src_addr or ipv6_src_addr) of the signaling message transmitted from the MMT streaming server 500 from the MMT streaming server 500 to the address of the MMT intermediate entity 320 , And may generate a second signaling message set to a destination port different from the destination port (dst_port) of the signaling message transmitted from the MMT streaming server (500). At this time, in order to prevent a collision with another MMT intermediate entity, the MMT intermediate entity 1 310 adds the IP of the MMT 320 to the destination port value of the signaling message transmitted from the MMT streaming server 500, The destination port can be set to the last digit of the address.

Through this process, the MMT streaming server 500 has delivered only one signaling message, but a plurality of signaling messages corresponding to the multi-path are generated by the coordinator MMT intermediate entity, and the client 100 receiving the signaling message corresponding to the multi- The MMT streaming service can be requested and received using the generated signaling message (S1107). In the above example, since the first signaling message defines the MP table for MPU 1 and MPU 3, and the second signaling message defines the MP table for MPU 2, client 100 has MPU 1 and MPU 3 To the MMT streaming server 500, and the MPU 2 requests and requests the MMT intermediate entity 2 320 to sequentially order and reproduce the MMT stream, thereby enabling the MMT streaming service to be used in a multipath manner.

A method of providing a multi-path streaming service according to an embodiment of the present invention will be described in more detail with reference to FIG.

6 is a data flow chart for explaining a method of providing a multi-path streaming service according to the first embodiment of the present invention.

6, only a plurality of MMT intermediate entities constituting the streaming system are shown as the MMT intermediate entity 310 and the MMT intermediate entity 320. However, And the MMT 1 310 is the highest MMT intermediate entity located near the MMT streaming server 500.

Referring to FIG. 6, the client 100 requests the MMT streaming server 500 to provide an MMT streaming service (S101). The MMT streaming server 500 generates a signaling message including information on a package held by the MMT streaming server 500 at the request of the client 100 and transmits the signaling message to the MMT entity directly below the MMT entity 310, (S103). Here, the signaling message transmitted by the MMT streaming server 500 may be a PA message including all information. The PA message is a signaling message that includes all information for accessing the MMT package, the asset, i.e., the location, the asset information that constitutes the package, all messages that provide detailed information about the asset, the location of the MP table, And all information related to the package held by the device 500.

The signaling message delivered by the MMT streaming server 500 is transmitted to the client 100 through the MMT 1 310 and the MMT 320 320 in operation S103 through S107, The desired package can be selected (S109). Then, the selected package information is transmitted to the MMT streaming server 500 through the MMT intermediate entity 2 320 and the MMT intermediate entity 1 310 (S 109 to S 113).

The MMT streaming server 500 may provide MMT streaming data according to a request from the client 100. At this time, the MMT intermediate entity 320 transmits the MMT streaming data to the MMT 1 310 The MMT intermediate object 1 310 transmits a signaling message including the signaling message received from the MMT intermediate object 2 320 and the MP table held by the MMT intermediate object 310 to the MMT streaming To the server (500).

The MMT intermediate entity 1 310, which is the highest node, can be regarded as a node of a suitable branch point for controlling the multipath and can act as a coordinator. The MMT intermediate entity 310 is transmitted from the MMT streaming server 500 When the signaling message for the main path is received (S123), the signaling message for the sub path can be generated and transmitted to the MMT intermediate entity 2 320 (S125) as described above. In other words, in the signaling message for the main path transmitted from the MMT streaming server 500, after excluding the information excluding at least part of the package held by the MMT intermediate entity 320, To the address of the second entity 320, and then transmits the address to the client 100.

In addition, the MMT intermediate entity 2 320, which is a lower MMT intermediate entity, periodically transmits an MPT signaling message including the MP table to the MMT intermediate entity 310, which is an upward direction, And transmits the PA message, which is a sub-path signaling message for controlling the multi-path, to the MMT intermediate entity 2 320. Thus, the streaming data requested by the client 100 is transmitted through the multi-path (S129 to S133).

As described above, all MMT intermediate entities of the present invention can determine a route by sending a downward direction signaling message, that is, a PA message only to the immediately below MMT intermediate entity using their own information. In the upper MMT intermediate entity, Directional signaling message, that is, an MPT message, that conveys accumulated information to enable information of an entity to be received. This process can be continuously updated in a short cycle.

An apparatus configuration of the mediator MMT intermediate entity supporting the multi-path streaming service providing method according to the first embodiment of the present invention will be described with reference to FIG.

FIG. 7 is a diagram for explaining a configuration of an apparatus for supporting a multi-path streaming service providing method according to the first embodiment of the present invention.

As described above, it should be noted that the coordinator MMT intermediate entity 310 may be changed depending on the package it holds, although the example of the MMT intermediate entity 310 310 serving as the coordinator MMT intermediate entity in FIG. 4 is illustrated by way of example .

7, the coordinator MMT intermediate entity 310 of the present invention includes a transmitter 311, a coordinator setting unit 312, and a signaling message processor 313.

The transmission unit 311 supports transmission and reception of necessary information according to an embodiment of the present invention. In particular, the transmission unit 311 can receive the MPT signaling message from the lower MMT intermediate entity and receive the PA signaling message from the MMT streaming server 500 . The transmitting unit 311 may transmit the PA signaling message generated through the signaling message processing unit 313 to the lower MMT intermediate entity 310.

The coordinator setting unit 312 determines whether or not it can perform the role of the coordinator. That is, if the coordinator setting unit 312 determines that an upper MMT entity is not present in addition to the MMT streaming server 500, the coordinator setting unit 312 can determine that the coordinator can perform its role as an coordinator.

When the signaling message processing unit 313 is set to perform the role of the coordinator by the coordinator setting unit 312, when a PA message, which is a signaling message corresponding to the main path transmitted from the MMT streaming server 500, is received, Generates a signaling message for each sub-path, and processes the signaling message corresponding to the multi-path to be generated. For example, if the signaling message transmitted from the MMT streaming server 500, that is, the package-related information included in the PA message, is the MP table for MPU 1, MPU 2, and MPU 3, Since the entity 1 310 already knows the information about the MPU held by the lower MMT intermediate entity, the MPU 2 can confirm that it holds the MMT intermediate entity 2. The MMT intermediate entity 1 310 generates and delivers a first signaling message corresponding to the main path from which the MPU 2 is deleted from the MP table of the signaling message transmitted from the MMT streaming server 500, And delivers the first signaling message to the client 100 without modification.

The MMT intermediate object 1 310, which is an intermediate entity of the coordinator MMT, sets a sub-path and transmits a signaling message delivered from the MMT streaming server 500 to the MMT intermediate object 2 320, which holds the MPU 2, The second signaling message is set to include only the information about the MPU 2 held by the MMT intermediate entity 2 320, rather than delivering the signaling message received from the MMT streaming server 500 as it is, After the message is generated, it is delivered.

At this time, the MMT intermediate entity 310 changes the source address (ipv4_src_addr or ipv6_src_addr) of the signaling message transmitted from the MMT streaming server 500 from the MMT streaming server 500 to the address of the MMT intermediate entity 320 , And may generate a second signaling message set to a destination port different from the destination port (dst_port) of the signaling message transmitted from the MMT streaming server (500). At this time, in order to prevent a collision with another MMT intermediate entity, the MMT intermediate entity 1 310 adds the IP of the MMT 320 to the destination port value of the signaling message transmitted from the MMT streaming server 500, The destination port can be set to the last digit of the address.

The method for providing the multi-path streaming service according to the first embodiment of the present invention has been described above. In the method for providing a multi-path streaming service according to the first embodiment of the present invention, the client 100 and the MMT streaming server 500 may be connected through a network composed of an access network and a core network The MMT objects are distributed on the network and can provide information to the client 100 through the base station of the access network. The base station may include a plurality of base stations such as a base station (BS), a base transceiver station (BTS), a NodeB, and an eNodeB. The base station may include a base station controller (BSC) And a base station controller such as a network controller. In addition, the base station divides the digital signal processing unit and the radio signal processing unit, which are integrally implemented in the base station, into digital units (hereinafter, referred to as DUs and radio units (RUs) A plurality of RUs (not shown) may be provided, and a plurality of RUs (not shown) may be connected to a centralized DU (not shown).

The core network is a network system that performs main functions for mobile communication services such as mobility control and switching between access networks. The core network performs circuit switching or packet switching, Can be managed and controlled. In addition, the core network manages inter-frequency mobility, and may perform a role for interworking with the access network and the traffic in the core network and with other networks, e.g., the Internet network. The core network may further include a Serving GateWay (SGW), a PDN GateWay, a Mobile Switching Center (MSC), a Home Location Register (HLR), a Mobile Mobility Entity (MME), and a Home Subscriber Server It is possible. In addition, the MMT streaming server 500 may be connected through the Internet network connected to the core network, but may be connected through the core network.

Hereinafter, a method for providing a multi-path streaming service according to a second embodiment of the present invention will be described.

FIG. 8 is a block diagram illustrating a method for providing a multi-path streaming service according to a second embodiment of the present invention.

Referring to FIG. 8, the method for providing a multi-path streaming service according to the second embodiment of the present invention can be applied to an embodiment in which a client, which is an MMT packet receiving entity, acts as a direct server and transmits a package. That is, the clients 1, 2, 3, and 4 shown in FIG. 8 can receive MMT streaming data from the MMT streaming server 500 or a plurality of MMT intermediate objects, and distribute the received MMT streaming data to other clients have. At this time, the MMT entities constituting the network can be connected to each other in a one-to-one relationship, and the MMT streaming server 500 knows all the information about the packages held by the clients 1 to 4.

In this situation, the client 1 (100_1) requesting the MMT streaming service requests the MMT streaming server (500) to receive the MMT streaming data. The MMT streaming server 500 includes information on the clients 2 100_2, 100-3, and 100_4 that are the other clients holding the package corresponding to the MMT streaming service requested by the client 1 100_1 For example, a PA message to the client 1 (100_1).

The client 1 (100_1) receives the PA message from the client 3 (100_3), the MPU 2 from the client 3 (100_3), the client 2 (100_2) from the MPU 4 and the MPU 3 and the MPU 5 from the client 3 . At this time, the client 1 (100_1) can arrange the respective MPUs sequentially and reproduce the aligned MPUs.

A method for providing a multi-path streaming service according to a second embodiment of the present invention will be described in more detail with reference to FIG.

9 is a flowchart illustrating a method of providing a multi-path streaming service according to a second embodiment of the present invention.

Referring to FIGS. 8 and 9, the client 1 100_1 requests the MMT streaming server 500 for an MMT streaming service (S201). The MMT streaming server 500 receives the MMT streaming service and requests the client 2 100_2, the client 3 100_3, and the client 4 100_4, which are the other clients holding the package corresponding to the MMT streaming service requested by the client 1 100_1 And generates a signaling message, for example, a PA message including information on the client 2 100_2, the client 3 100_3 and the client 4 100_4, and transmits the signaling message to the client 1 100_1 (S203). Here, the PA message includes destination IP information of the client 1, mid-source IP information of one or more other clients to provide the MMT packet, and a package ID, one or more asset IDs, And may include information on at least one MPU ID.

The client 1 (100_1) receiving the message establishes a connection with another client using the signaling message received from the MMT streaming server 500 (S205). At this time, the client 1 (100_1) performs sequential connection with another client considering the available resources. More specifically, when receiving a signaling message including information on the client 2 100_2, the client 3 100_3 and the client 4 100_4 from the MMT streaming server 500, It is possible to first establish a connection with any one of the clients, for example, the client 2 (100_2). At this time, the selected other client can be set considering the MPU ID held, and can be selected at random. In addition, the client 1 (100_1) can be connected to the second client (100_2) in a variety of known short-range wireless communication methods.

The client 1 100_1 calculates the current channel usage of the peer Ccurr and the maximum channel capacity of the peer Cmax in step S207 and transmits the calculated information through the NAMF message To the client 2 (100_2) (S209).

The client 1 100_1 determines whether the capacity of the maximum channel capacity Cmax minus the current channel capacity Ccurr is less than the channel margin for reliability Cmargin S211, Since one resource is in a sufficient state, a connection is established with another client, for example, the client 3 (100_3) (S213).

On the other hand, if it is less than in step S211, since there is no more resources to be connected, the client 1 (100_1) simultaneously requests the MPUs held by the clients to the clients connected so far (S215) .

The client 1 100_1 continuously monitors the current channel usage amount Ccurr and the maximum channel capacity Cmax in step S217. If it is determined that there is a change in the current channel usage amount Ccurr in step S219, Since the connection with the existing connected client is released or a special event exists, the current channel usage amount (Ccurr) and the maximum channel capacity (Cmax) can be calculated again, and the calculated information can be transmitted to the other connected clients through the NAMF message

This process ends when the reception of the MMT streaming data requested by the client 1 (100_1) is completed.

Hereinafter, a main configuration of a client 100 that supports a method of providing a multi-path streaming service according to a second embodiment of the present invention will be described.

FIG. 10 is a configuration diagram of a device supporting a multi-path streaming service providing method according to a second embodiment of the present invention.

Referring to FIG. 10, the client 100 supporting the second embodiment of the present invention may include a signaling transmission / reception unit 110, a resource management unit 120, and a connection processing unit 130.

First, the signaling transmission / reception unit 110 can support transmission and reception of various messages, such as receiving a PA message from the MMT streaming server 500, requesting connection to another client, and transmitting a NAMF message.

The resource management unit 120 monitors the available channel capacity of the client 100, calculates the current channel usage amount and the maximum channel capacity, and supports multiple connections with a plurality of other clients considering channel margins based on the current channel usage amount and the maximum channel capacity can do.

The connection processing unit 130 may select a plurality of different clients to establish a multiple connection in consideration of the PA message transmitted from the MMT streaming server 500 and the available channel capacity calculated through the resource management unit 120, And to request and receive MMT packets, that is, MMT packets, in units of MPU from other connected clients.

The method for providing the multi-path streaming service according to the second embodiment of the present invention has been described above.

10, the client 100 of the present invention has been described based on the second embodiment, but the client 100 of the present invention is not limited to the second embodiment, The operation may be performed in accordance with this. In other words, the client 100 of the present invention requests streaming data to the MMT streaming server 500, and when a signaling message including information on another client is received from the MMT streaming server 500, And when the respective signaling messages including the address information of the MMT streaming server 500 and the plurality of MMT intermediate entities are received, an operation according to the first embodiment can be performed.

A processor mounted on each device that executes the method of providing a multipath streaming service of the present invention can process program instructions for executing the method according to the present invention. In one implementation, the processor may be a single-threaded processor, and in other embodiments, the processor may be a multithreaded processor. Further, the processor is capable of processing instructions stored on a memory or storage device.

In addition, the MMT streaming server 500 and the MMT entity according to the embodiment of the present invention have the same hardware configuration as a typical Web server or a network server. However, the software includes a program module implemented through a language such as C, C ++, Java, Visual Basic, Visual C, or the like.

In addition, the method of providing a multi-path streaming service according to an embodiment of the present invention may be performed by at least one module. Here, the term '~ module' refers to a software component, and '~ module' performs certain roles. By way of example, '~ module' may include components such as software components, object-oriented software components, class components and task components, and processes, functions, attributes, procedures, Routines, segments of program code, drivers, data, databases, data structures, tables, arrays, and variables. In addition, the functions provided in the components and '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 subject matter implementations described herein may be embodied in other types of digital electronic circuitry, or alternatively, of the structures disclosed herein and their structural equivalents May be embodied in computer software, firmware, or hardware, including, or in combination with, one or more of the foregoing. Implementations of the subject matter described herein may be embodied in one or more computer program products, i. E. One for computer program instructions encoded on a program storage medium of the type for < RTI ID = 0.0 & And can be implemented as a module as described above. The computer-readable medium can be a machine-readable storage device, a machine-readable storage substrate, a memory device, a composition of matter that affects the machine readable propagation type signal, or a combination of one or more of the foregoing.

In addition, the method of providing a multi-path streaming service according to an exemplary embodiment of the present invention 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 multi-path streaming service providing method according to an exemplary embodiment of the present invention includes a media processing unit (MPU) position information about a package that the MMT entity holds, generating a signaling message including an MP table (MP table) defining a location and an MPU ID (MPU_id) of the MMT, and transmitting the signaling message to the MMT entity using the generated signaling message so that a multi- To one or more other MMT entities, and so forth.

At this time, the program recorded on the recording medium can be read and installed in the computer and executed, thereby executing the above-described functions.

In order to allow a computer to read a program recorded on a recording medium and to execute functions implemented by the program, the above-mentioned program may be stored in a computer-readable medium such as C, C ++, JAVA, machine language, and the like.

The code may include a function code related to a function or the like that defines the functions described above and may include an execution procedure related control code necessary for the processor of the computer to execute the functions described above according to a predetermined procedure. In addition, such code may further include memory reference related code as to what additional information or media needed to cause the processor of the computer to execute the aforementioned functions should be referenced at any location (address) of the internal or external memory of the computer . In addition, when a processor of a computer needs to communicate with any other computer or server that is remote to execute the above-described functions, the code may be stored in a memory of the computer using a communication module of the computer, It may further include a communication-related code such as how to communicate with another computer or a server, and what information or media should be transmitted or received during communication.

Such computer-readable media suitable for storing computer program instructions and data include, for example, magnetic media such as hard disks, floppy disks and magnetic tape, compact disk read only memory (CD-ROM) Optical media such as a DVD (Digital Video Disk), a magneto-optical medium such as a floppy disk, and a ROM (Read Only Memory), a RAM , Random Access Memory), flash memory, EPROM (Erasable Programmable ROM), and EEPROM (Electrically Erasable Programmable ROM). The processor and memory may be supplemented by, or incorporated in, special purpose logic circuits.

The computer readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. The functional program for implementing the present invention and the related code and code segment may be implemented by programmers in the technical field of the present invention in consideration of the system environment of the computer that reads the recording medium and executes the program, Or may be easily modified or modified by the user.

While the specification contains a number of specific implementation details, it should be understood that they are not to be construed as limitations on the scope of any invention or claim, but rather on the description of features that may be specific to a particular embodiment of a particular invention Should 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 may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although the features may operate in a particular combination and may be initially described as so claimed, one or more features from the claimed combination may in some cases be excluded from the combination, Or a variant of a subcombination.

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

The present invention relates to a method of providing a streaming service, and more particularly, to a method and apparatus for providing a streaming service by providing a multi-path streaming service capable of providing a streaming service through a multi- A service providing method, a computer readable recording medium therefor, and a computer program.

According to the present invention, a streaming service can be provided through a multipath rather than a single path when providing a streaming service of the MMT scheme. By providing a streaming service in units of MPU, limited network resources can be used more efficiently. Therefore, the present invention can contribute to the development of the streaming service industry.

In addition, since the present invention is not only possible to be marketed or operated, but also can be practically and practically carried out, it is industrially applicable.

100: client 110: signaling transmission /
120: resource management unit 130: connection processing unit
310: Coordinator MMT intermediate entity 311: Transmitter
312: coordinator setting unit 313: signaling message processing unit
500: MMT streaming server 600: Asset
610: MMT packet header 620: MMT packet payload data
630: MMT payload header 640: MMT payload data
800: MMT signaling message 810: package consumption
820: Package Delivery 811: PA Messages
812: MPI message 813: MPT message
814: CRI message 815: DCI message

Claims (14)

A method for providing a multi-path streaming service in a streaming system comprising a plurality of MMT entities operating according to an MPEG Media Transport (MMT) communication protocol,
(MP table) for defining a media processing unit (MPU) location information and an MPU ID (MPU_id) for a package held by the MMT entity, and a signaling message ≪ / RTI > And
Transmitting the signaling message to one or more other MMT entities such that the MMT entity can provide a multi-path streaming service using the generated signaling message;
The method of claim 1, The method according to claim 1,
The MPU location information
Dependent on the asset location (asset_location) information,
The MPU ID
Is included only when a packet ID (packet_id) is defined in a location type (location_type) defined in the MMT general location information (MMT_general_location_info ()) of the MP table. An MMT streaming server for providing a streaming service of an MPEG media transport (MMT) method and a package for providing a MMT streaming server located between the client using the streaming service and the MMT streaming server and provided by the MMT streaming server according to the MMT communication protocol A method for providing a multi-path streaming service in a streaming system including a plurality of MMT intermediate entities capable of providing all or part of the same package as the MMT package,
Each of the plurality of MMT intermediate entities sharing information related to a package they own via a signaling message through a signaling message;
Setting an MMT intermediate entity of the plurality of MMT intermediate entities as a coordinator MMT intermediate entity based on the shared signaling message;
Generating a signaling message to be transmitted from the MMT streaming server to the client according to a request of the client, the signaling message corresponding to at least two or more multipaths using the shared signaling message; And
The coordinator MMT intermediate entity forwards the generated at least two signaling messages to the client so that the client can request and receive the MMT streaming service according to the signaling message;
The method of claim 1, The method of claim 3,
The information associated with the package
Means a media processing unit (MPU) location information and an MPU ID (MPU_id)
The signaling message
(MP table) in which the MPU location information and the MPU ID are defined. The method of claim 3,
Wherein the sharing comprises:
Transmitting a signaling message including information related to a package held by each of the plurality of MMT intermediate entities to an upper MMT intermediate entity located in an upward direction of the MMT streaming server; And
The upper MMT entity transmits a signaling message including a signaling message transmitted from a lower-level MMT intermediate entity and information related to a package held by the higher-level MMT entity in a direction upstream of the MMT streaming server;
The method of claim 1, 6. The method of claim 5,
The step of setting the coordinator MMT intermediate entity
Wherein the entity located in the upward direction of the MMT streaming server sets the topmost MMT intermediate entity, which is an MMT streaming server, as the coordinator MMT intermediate entity. The method of claim 3,
The generating step
The coordinator MMT intermediate entity determines that there is an MMT intermediate entity holding at least a part of the same package of information related to the package described in the MP table of the signaling message transmitted from the MMT streaming server using the shared signaling message Generating a first signaling message in which the corresponding information is deleted from the MP table; And
Generating a second signaling message in which the coordinator MMT intermediate entity deletes the remainder of the signaling message transmitted from the MMT streaming server except for the same information in the MP table;
The method of claim 1, 8. The method of claim 7,
Wherein the generating the second signaling message comprises:
The coordinator MMT intermediate entity deletes the remainder excluding the same information from the MP table of the signaling message transmitted from the MMT streaming server, and then transmits the source address (src_addr) of the signaling message to the MMT intermediate entity And generates a second signaling message in which a destination port (dst_port) of the signaling message is set as another destination port. A method for providing a multi-path streaming service in an MMT streaming server providing a streaming service of an MPEG media transport (MMT) scheme and a streaming system including a plurality of clients,
Wherein one of the clients requests the package to the MMT streaming server;
Receiving a signaling message from the MMT streaming server, the signaling message including information about one or more other clients holding at least a portion of the package;
The client connecting with at least one of the other clients included in the signaling message considering the available channel capacity; And
Simultaneously requesting and receiving streaming data from another client connected to the client;
The method of claim 1, 10. The method of claim 9,
The received signaling message
Wherein the information includes at least one of an IP address of the client, an IP address of another client, a package ID corresponding to each of the other clients, one or more asset IDs, and at least one MPU ID. 10. The method of claim 9,
The step of connecting with the other client
Calculating a current channel usage of a peer and a maximum channel capacity of the peer; And
Performing a connection between the client and another client until a capacity of the maximum channel capacity minus the current channel usage is less than a channel margin for reliability;
The method of claim 1, 12. The method of claim 11,
After the client performs a connection with another client,
Continuously monitoring the current channel usage amount and the maximum channel capacity of the client and, when a change in the current channel usage amount is detected, restricting the current channel usage amount and the maximum channel capacity;
The method of claim 1, further comprising: A computer-readable recording medium storing a program for executing the method according to any one of claims 1 to 12. 13. A computer program embodied on a computer readable recording medium which is embodied to perform the method recited in any one of claims 1 to 12.

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