WO2010058908A2

WO2010058908A2 - Mobile terminal equipped with multi-interface, method for receiving multimedia streaming, server for providing multimedia streaming using multi-network, and method thereof

Info

Publication number: WO2010058908A2
Application number: PCT/KR2009/005952
Authority: WO
Inventors: 이종민; 전승현; 최준균
Original assignee: 한국과학기술원
Priority date: 2008-11-24
Filing date: 2009-10-15
Publication date: 2010-05-27
Also published as: WO2010058908A3

Abstract

The invention relates to a mobile terminal equipped with a multi-interface, to a method for receiving multimedia streaming, to a server for providing multimedia streaming using a multi-network, and to a method thereof. The method for providing multimedia streaming using a multi-network comprises the steps of: determining a connection network of a mobile terminal in accordance with the request for content from the mobile terminal; and allocating a content data packet to each of the connection networks if at least two connection networks exist, and transmitting the data packet to the mobile terminal.

Description

Mobile terminal and multimedia streaming receiving method equipped with multiple interfaces, multimedia streaming providing server using multiple networks and method thereof

The present invention relates to a multimedia streaming service, and more particularly, to a mobile terminal, a multimedia streaming receiving method, a multimedia streaming providing server, and a method for more efficiently downloading multimedia contents by fully utilizing network resources of a terminal. will be.

In general, a streaming service may refer to a technology capable of processing various multimedia data transmitted as if it is a continuous and continuous flow of water.

Multimedia streaming technology is becoming more and more important with the growth of the Internet because most users do not have fast access lines to download large amounts of multimedia content immediately. In these situations, streaming technology allows the client browser or plug-in to start presenting data even before all the files are transferred.

However, currently provided streaming services provide services regardless of QoS (Quality of Service), user preference, and bandwidth of a user application considering a single access network, despite a mixed network of wired and wireless access networks. .

Also, in a streaming environment, the state of the network does not always remain constant. In general, even if the multimedia streaming service is executed in accordance with the initial network bandwidth, if the service target is large, the bandwidth is reduced, and if it is more severe, network congestion occurs, and thus, a stable service cannot be guaranteed.

In other words, the existing streaming service is not only able to support an efficient service to the user, but also various access network conditions and user requirements are excluded.

The present invention provides a mobile terminal, a multimedia streaming receiving method, a multimedia streaming providing server, and a method for supporting a highly available multimedia streaming service by utilizing the available interface of the mobile terminal to the maximum.

The present invention provides a mobile terminal, a multimedia streaming receiving method, a multimedia streaming providing server, and a method for supporting an efficient multimedia streaming service in consideration of the bandwidth of each access network for a mobile terminal capable of multiple network access.

According to an embodiment of the present invention, a method for providing multimedia streaming using multiple networks may include: determining an access network of the mobile terminal according to a content request of the mobile terminal; And when the at least two access networks exist, allocating a data packet of content to each access network and transmitting the data packet to the access terminal.

In addition, the multimedia streaming providing server using multiple networks according to an embodiment of the present invention, the connection information receiving unit for determining the access network of the mobile terminal according to the content request of the mobile terminal; And, if there are at least two access network may include a content transmission unit for allocating a data packet of the content to each access network to transmit to the mobile terminal.

In addition, the multimedia streaming reception method of a mobile terminal according to an embodiment of the present invention in the multimedia streaming reception method of a mobile terminal having at least two interfaces corresponding to different access networks, the step of receiving access information from each access network; ; Transmitting access information of the access network to a multimedia streaming providing server according to a content request of a user; And receiving the content by activating each interface corresponding to the access network when the multimedia streaming providing server transmits the content through two or more access networks based on the access information of the access network.

In addition, a mobile terminal equipped with multiple interfaces according to an embodiment of the present invention includes a mobile terminal having at least two interfaces corresponding to different access networks, comprising: a connection information receiver configured to receive access information from each access network; An access information transmitter for transmitting access information of the access network to a multimedia streaming providing server according to a content request of a user; And a content receiver configured to receive the content by activating each interface corresponding to the access network when the multimedia streaming server transmits the content through two or more access networks based on the access information of the access network.

According to the present invention, it is possible to increase the service availability and to provide a query service for the multimedia contents by supporting a multimedia streaming service by simultaneously using several access networks.

In particular, by allocating the download data of the multimedia in consideration of the bandwidth of the access network, it is possible to improve the streaming transmission efficiency and the efficiency of network resources.

1 is a view for explaining the configuration of a mobile terminal and a multimedia streaming server for providing a multimedia streaming service of the present invention.

2 is a diagram illustrating a multimedia streaming service process between a mobile terminal and a multimedia streaming providing server according to an embodiment of the present invention.

FIG. 3 is a diagram for describing a process of splitting and transmitting a data packet of content according to a bandwidth of an access network in a multimedia streaming providing server.

4 is a diagram for describing a process of splitting and transmitting a data packet of content using RTP in a multimedia streaming providing server.

5 is a diagram illustrating an example of an RTP protocol structure used in a multimedia streaming providing server.

FIG. 6 is a diagram illustrating a process of splitting and transmitting a data packet of content using SVC in a multimedia streaming providing server.

7 is a diagram illustrating an example of an SCTP protocol structure used in a multimedia streaming providing server.

FIG. 8 is a diagram for describing a process of splitting and transmitting a data packet of content using SCTP in a multimedia streaming providing server.

9 is a diagram for describing a content receiving process in a mobile terminal equipped with multiple interfaces.

Hereinafter, with reference to the accompanying drawings will be described a mobile terminal and a multimedia streaming receiving method, a multimedia streaming providing server and a method using multiple networks according to an embodiment of the present invention.

Referring to FIG. 1, the mobile terminal 110 includes a wired LAN, a wireless LAN (IEEE 802.11a / b / g, etc.), WiBro, HSPDA, etc. A terminal device capable of multiple access to two or more access networks 120_1, 120_2,..., 120_n may be referred to.

The mobile terminal 110 may access the multimedia streaming providing server 130 to download and play the multimedia content desired by the user from the multimedia streaming providing server 130.

In this case, the mobile terminal 110 may maintain a connection with the multimedia streaming providing server 130 through an access network based on an IP (internet protocol) communication method among the available access networks 120_1, 120_2,..., 120_n.

The multimedia streaming providing server 130 constructs various multimedia contents (for example, internet protocol television (IPTV) contents, video on demand (VOD) contents, etc.), and provides multimedia contents desired by the user to the mobile terminal 110. A multimedia streaming service for downloading can be provided.

Referring to FIG. 1, the mobile terminal 110 may include a connection unit 111, a connection information receiving unit 112, a connection information transmitting unit 113, and a content receiving unit 114.

The connection part 111 provides a multi-connection interface, and corresponds to an interface (interface 1, interface 2, ..., interface n) 111_1, 111_2 corresponding to different connection networks 120_1, 120_2, ..., 120_n to maintain a connection. , ..., 111_n).

The connection information receiver 112 may receive the connection information from each of the access networks 120_1, 120_2,..., 120_n maintaining the connection state with the interfaces 111_1, 111_2,..., 111_n. In this case, the access information may include a link bandwidth currently available for maintaining the interconnection.

When the download request command for the multimedia content is generated from the user, the access information transmitter 113 accesses the access networks 120_1, 120_2,..., 120_n that are currently maintained together with the download request command for the multimedia content. Information may be transmitted to the multimedia streaming providing server 130.

The content receiving unit 114 may receive a response signal for the download request command of the multimedia content from the multimedia streaming providing server 130, and may receive the requested multimedia content from the multimedia streaming providing server 130. have. In this case, the multimedia streaming providing server 130 may divide and transmit the multimedia content using two or more access networks 120_1, 120_2,..., 120_n based on the access information. Meanwhile, the content receiving unit 114 activates the interfaces 111_1, 111_2,..., 111_n corresponding to the access networks 120_1, 120_2,..., 120_n used by the multimedia streaming providing server 130, and then, each interface. Data packets of the multimedia content may be received through 111_1, 111_2,..., And 111_n, and the received data packets may be combined according to the data order.

Referring to FIG. 1, the multimedia streaming providing server 130 may include a content storage unit 131, a connection information receiver 132, and a content transmitter 133.

The content storage unit 131 may process and store various multimedia contents in a form capable of a multimedia streaming service.

The access information receiver 132 may receive access information of the access networks 120_1, 120_2,..., 120_n currently connected to the mobile terminal 110 from the mobile terminal 110.

The content transmitter 133 is based on the access information of the access network (120_1, 120_2, ..., 120_n) when there are two or more access networks (120_1, 120_2, ..., 120_n) currently connected to the mobile terminal 110. The multimedia content may be divided and transmitted to the mobile terminal 110. The content transmitter 133 allocates data packets of the multimedia content to the access networks 120_1, 120_2,..., 120_n that are currently connected to the mobile terminal 110, respectively, to access networks 120_1, 120_2,..., 120_n The multimedia content can be divided and transmitted.

2 is a diagram illustrating a multimedia streaming service method between a mobile terminal and a multimedia streaming providing server according to an embodiment of the present invention. Here, the embodiment of the present invention can be implemented by the configuration of FIG.

In operation S201, the mobile terminal 110 may receive access information from each of the access networks 120_1, 120_2,..., 120_n maintaining the interconnection. Here, the mobile terminal 110 is capable of multiple access with access network 1 (120_1), access network 2 (120_2), access network n (120_n), and is currently connected with access network 1 (120_1) and access network 2 (120_2) of the access network. When it is assumed that the state is maintained, access information may be received from access network 1 (120_1) and access network 2 (120_2), respectively. In this case, the access information may include a link bandwidth that can be used to maintain the interconnection.

In step S202, the mobile terminal 110 streams the multimedia information based on the user's request to download the multimedia content and the access information of the access network 1 120_1 and the access network 2 120_2 that maintain the current access state. It may transmit to the providing server 130. In this case, the mobile terminal 110 may maintain a connection with the multimedia streaming providing server 130 using an access network capable of IP communication among the access network 1 120_1 and the access network 2 120_2.

In step S203, the multimedia streaming providing server 130 uses the access information of the access network 1 (120_1) and the access network 2 (120_2) received from the mobile terminal 110 (download session for the multimedia content (download session) ) Can be divided. In other words, the multimedia streaming providing server 130 calculates available bandwidths of the access network 1 (120_1) and the access network 2 (120_2), respectively, to the access network 1 (120_1) and the access network 2 (120_2) according to the available bandwidth. The data packet of the multimedia content may be allocated.

The multimedia streaming providing server 130 may calculate the available bandwidth by using the link bandwidth and the carrier-to-noise ratio of the access network 1 120_1 and the access network 2 120_2. The available bandwidth may be defined as in Equation 1.

[Equation 1]

C _i ＝ B _i log₂ (1 +CINR _i(i = 1, 2, ..., n)

Here, C _i may represent an available bandwidth of the access network i, B _i may represent a link bandwidth of the access network i, and CINR _i may mean a carrier-to-noise ratio of a corresponding link of the access network i.

When the multimedia streaming providing server 130 assumes that the multimedia content 301 is composed of eight data packets as illustrated in FIG. 3, sequence numbers S1 to S8 are assigned to each data packet according to the data order. ) Can be given.

In addition, assuming that the multimedia streaming providing server 130 transmits the multimedia content 301 using a real-time transport protocol (RTP) as shown in FIG. 4, a sequence number of the RTP is provided. Can be used.

An example in which the multimedia streaming providing server 130 transmits the multimedia content 301 using RTP will be described in detail with reference to FIG. 4.

In addition, the multimedia streaming providing server 130 allocates a data packet of the multimedia content 301 in proportion to the available bandwidths of the access network 1 120_1 and the access network 2 120_2 to perform a download preparation process for the multimedia content. You can finish it. For example, when the available bandwidths of the access network 1 (120_1) and the access network 2 (120_2) are 12 Mbps and 4 Mpps, respectively, S1, S3, S4, S5, S7, and S8 correspond to the access network 1 120_1 having a speed of 12 Mbps A data packet corresponding to S2 and S6 may be allocated to the access network 2 120_2 having a speed of 4 Mbps.

In operation S204, the multimedia streaming providing server 130 may transmit response information about the download request command of the multimedia contents to the mobile terminal 110 when the download preparation process of the multimedia contents is completed.

In operation S205, the multimedia streaming providing server 130 may transmit data packets of the multimedia content to the mobile terminal 110 through the allocated access network, respectively. Referring to FIG. 3, the multimedia streaming providing server 130 transmits data packets corresponding to S1, S3, S4, S5, S7, and S8 through the access network 1 120_1 and receives data packets corresponding to S2 and S6. It may be transmitted to the mobile terminal 110 through the access network 2 (120_2). In this case, the mobile terminal 110 may receive data packets of S1, S3, S4, S5, S7, and S8 through the interface 1 (111_1) connected to the access network 1 (120_1) with respect to the multimedia content. The data packet of S2 and S6 may be received through the interface 2 111_2 that is in a connection state with the access network 2 120_2.

In this case, the multimedia streaming providing server 130 may transmit a data packet of the multimedia content to the mobile terminal 110 using an RTP protocol, an SVC protocol, or an SCTP protocol.

The multimedia streaming providing server 130 may identify a source of an RTP stream for each RTP session by setting a SSRC (Synchronization Source) value starting with a randomly selected number in the multimedia content 301. At this time, the sequence number set in the RTP packets of the multimedia content 301 using the same SSRC value is an initial value 411 and a value that increases by 1 for each RTP packet transmitted. 412.

In this case, the interface included in the access unit 111 of the mobile terminal 110 may restore the received packet in the correct order by checking the packet loss and the data order based on the sequence number.

4, SSRC values 1100 are set in the multimedia content 301, and sequence numbers assigned to the frames included in the multimedia content 410 are 1, 2, 3,... In the case of N, the multimedia streaming providing server 130 is an example of transmitting the multimedia content 410 to the mobile terminal 110 through the WiMAX 420 and the WLAN 430.

At this time, since the WLAN 430 has a relatively wider band than the WiMAX 420, the WLAN 430 may receive three

frames

431, 432, 433 at a time interval in which the WiMAX 420 receives one frame 421. Can be. In this case, the WLAN 430 may be about three times larger than the available bandwidth measured using Equation 1 than the WiMAX 420.

Referring to FIG. 5, in the exemplary embodiment of FIG. 4, the RTP protocol structure used by the multimedia streaming providing server 130 to transmit the multimedia content 410 may be divided into 32-bit units.

The first column 510 of the RTP protocol structure is a 2-bit version (V) 511, a 1-bit padding (P) 512, and a 1-bit extension (X) 513, as shown in FIG. , 4-bit CSRC count (CC) 514, 1-bit marker (M) 515, 7-bit payload type (PT) 516, and sequence number 517.

In this case, the version (V) 511 may be information for identifying a version of the RTP, and the padding (P) 512 may be information indicating that one or more other padding octets have been added to the end of the payload when set to 1. . In this case, the padded first octet may indicate the number of additional octets included.

In addition, the extension (X) 513 is information that can indicate whether there is an extension header added to the fixed RTP header, CSRC Count (CC: CSRS Count) (514) is a CSRC (Contributing Source) after the fixed RTP header You can list the number of identifiers.

The marker (M) 515 may be information indicating whether to use a marker bit defined according to the RTP profile, and the payload type (PT) 516 may be information defining an RTP payload type. .

The second column 520 of the RTP protocol structure may consist of a 32-bit Timestamp.

In this case, the timestamp may indicate the sampling instant of the first octet in the RTP packet. The sampling frequency used in the RTP packet depends on the data type. For example, when using the G.711 voice codec in Windows XP, the sampling frequency may be set to 8 kHz.

The third column 530 of the RTP protocol structure may consist of 32-bit Synchronization Source (SSRC).

Synchronization Source (SSRC) may be a value starting with a randomly selected number set in the multimedia content 301 by the multimedia streaming providing server 130 to identify the source of the RTP stream for each RTP session.

The fourth column and the column 540 following the fourth column of the RTP protocol structure may be configured as 32-bit contributing sources (CSRs).

The CSRC value is information representing sources of various streams that contributed to the RTP session, and the SSRC value of each source in the RTP session may be added to the CSRC value by the RTP mixer.

The multimedia streaming providing server 130 may first encode the multimedia content 301 into a base layer 621.

In this case, the multimedia streaming providing server 130 includes a minimum quality substream and at least one enhancement layer in a base layer 621. Scalable Layer 611 may be created. In this case, the upper layer may add additional quality to the base layer.

In addition, the multimedia streaming providing server 130 may further generate a fine grained scalability (GFS) layer 612 that encodes an upper layer as close as possible to each other to follow the network band.

Finally, the multimedia streaming providing server 130 transmits using a base layer 621, a spatial scalable layer 611, and a fine grained scalability (GFS) layer 612. A desired data packet may be transformed into a format used for transmission in scalable video coding (SVC), and a sequence number 630 may be set for each data packet.

At this time, the format of the data packet that can be changed by the multimedia streaming providing server 130 is shown in Table 1 below. In this case, the unit of resolution is pixel.

TABLE 1

In the example of FIG. 6, the multimedia streaming providing server 130 may transmit the QCIF 720 transformed into the base layer 621 and the FGS layer 612 to the WLAN band using a scalable video coding (SVC) method.

In addition, when the WiMAX band is available, the multimedia streaming server 130 may additionally increase the resolution by transmitting the CIF 610 transformed into the spatial scalable layer 611 and the FGS layer 612 to the WiMAX band. Yes, and vice versa.

Stream Control Transmission Protocol (SCTP) is a transport layer protocol identical to TCP or UDP. It is a next-generation transport protocol that was enacted as a standard for RFC 4960 in September 2007 by the IETF Signaling Transport Working Group.

The SCTP has a multi-streaming function for sending a multi-stream to one SCTP association and a multi-homing function for using two or more interfaces.

The SCTP consists of a header format 710, a junk 720, and a parameter 730 as shown in FIG. 7.

In addition, the junk 720 may include a TSN 721, a stream identifier 722, a stream sequence number 723, and a payload protocol identifier 724.

In this case, the transport sequence number (TSN) 721 may be any number for identifying each junk of the SCTP packet. SCTP may be composed of several TSNs according to each stream ID.

In addition, the Stream Identifier 722 is an identifier representing each stream, and the Stream Sequence Number 723 may be a number of each piece arbitrarily set when the stream is divided into pieces.

The payload protocol identifier 724 may be an ID of a higher application protocol.

In addition, the parameter (Optional / Variable-length Parameter) 730 may be expressed differently according to the parameter value. For example, if Parameter Type = 5, the IPv4 address may appear as a parameter value and the length may be 8.

The multimedia streaming providing server 130 first sets a stream identifier 722 for each stream of the multimedia content 301 to be transmitted to different access networks 120, and sets a sequence number indicating the transmission order for each stream identifier 722. SSN: Stream Sequence Number (723) can be set. The mobile terminal 110 may order the received streams using the SSN 723.

In the example of FIG. 8, the SSN 723 of the stream 810 transmitted by the multimedia streaming providing server 130 using WLAN is 0, and the SSN 723 of the stream 820 transmitted using WiMAX is 1. Since it is set to, the mobile terminal 110 may determine that the order of the stream 810 is first.

Next, the multimedia streaming providing server 130 may set a transmission sequence number (TSN) 721 in a frame transmitted through each stream. In this case, the mobile terminal 110 may order each frame based on the TSN.

Subsequently, the multimedia streaming providing server 130 may include a frame in which the TSN 721 is set and transmit the stream in which the Stream Identifier 722 and the SSN 723 are set to different access networks 120.

Finally, the mobile terminal 110 receives streams transmitted through different access networks 120, and based on the TSN 721, the Stream Identifier 722, and the SSN 723, each stream and a frame included in the stream. Can be ordered.

In the example of FIG. 8, the mobile terminal 110 may arrange the frames 811, the frames 821, the frames 812, and the frames 813 sequentially according to the TSN 721 set in each frame. .

In step S901, the mobile terminal 110 transmits the access information of the access network 120 that maintains the current connection state to the multimedia streaming providing server 130 together with the download request command of the multimedia content.

In step S902 and step S903, when the mobile terminal 110 receives the response information for the download request command of the multimedia content from the multimedia streaming providing server 130, that is, the access network 120 in the connected state 120 It may be determined whether there are two or more interfaces 111 currently available.

In step S904 and step S905, the mobile terminal 110 activates one interface as a single interface when there is only one currently available interface, and thus, through the access network 120 in a connected state with the activated interface, Data packets of multimedia content may be sequentially received.

In step S906 and step S907, when there are two or more currently available interfaces, the mobile terminal 110 activates both of the two or more interfaces as multiple interfaces, thereby connecting each access network 120 to the active interface. ) Can receive the data packet of the multimedia content, respectively. The mobile terminal 110 may combine the received data packets according to sequence numbers in the process of receiving data packets of the multimedia content through two or more interfaces.

Referring to FIG. 3, the mobile terminal 110 receives data packets of S1, S3, S4, S5, S7, and S8 through interface 1 111_1 corresponding to the access network 1 120_1 and the access network 2. Data packets of S2 and S6 may be received through interface 2 111_2 corresponding to 120_2, and the received data packets may be combined according to sequence numbers.

Therefore, when the mobile terminal can access the multiple networks, the data amount of the multimedia content to be streamed through each access network can be adjusted in consideration of the bandwidth of the access network. Can be played after.

In addition, the present invention can receive a service by applying a cooperative method even if it is difficult to receive the service due to a lack of BW of one access network, the existing protocol such as RTP or RTCP, or layered coding such as SVC (Scalable Video Coding) It can also be used to provide wide scalability.

In addition, since it is inefficient to put two identical interfaces in one terminal, it is possible to provide a service using a terminal combining different heterogeneous networks (WLAN + WiMAX, WLAN + HSPA, WiMAX + HSPA) currently on the market. .

As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

Claims

Determining an access network of the mobile terminal according to a content request of the mobile terminal; And,

When at least two access networks exist, allocating a data packet of content to each access network and transmitting the same to each access network;

Multimedia streaming method using a multi-network including a.
The method of claim 1,

Determining the access network of the mobile terminal,

Receiving a currently available access network and access information of each access network from the mobile terminal, Multimedia streaming providing method using multiple networks.
The method of claim 2,

The connection information,

And a link bandwidth of the access network maintaining the connection with the mobile terminal.
The method of claim 1,

The step of transmitting the data packet of the content to the mobile terminal,

Calculating available bandwidth of each access network;

Allocating the data packet according to the available bandwidth;

Transmitting the allocated data packet to the mobile terminal through each access network.

Including, multimedia streaming providing method using multiple networks.
The method of claim 4, wherein

Computing the available bandwidth,

And calculating the available bandwidth by using the link bandwidth of the access network to the mobile terminal.
The method of claim 4, wherein

The step of transmitting the data packet of the content to the mobile terminal is a multimedia streaming by using a multi-network to allocate the data packet of the content to each access network using the RTP protocol, SVC protocol or SCTP protocol, to the mobile terminal How to Provide.
The method of claim 6,

The step of transmitting the data packet of the content to the mobile terminal when using the RTP protocol

Setting a synchronization source (SSRC) value starting with a randomly selected number in the content; And

Setting a sequence number in the RTP packets of the content using the same SSRC value

More,

The transmitting of the allocated data packet to the mobile terminal through each access network includes transmitting the SSRC value and the sequence number set in the data packet to the mobile terminal through each access network together with the allocated data packet. How to provide multimedia streaming using.
The method of claim 7, wherein

The sequence number is an initial value is an arbitrary value, a value that increases by one each time the data packet is transmitted, multimedia streaming providing method using multiple networks.
The method of claim 6,

The step of transmitting the data packet of the content to the mobile terminal when using the SVC protocol

Encoding the multimedia content into a base layer;

Generating a spatial scalable layer including a minimum quality sub stream and at least one enhancement layer in the base layer;

Generating an FGS layer encoding a higher layer as close as possible to each other to follow the network band; And

Changing the allocated data packet into a format used for transmission in scalable video coding (SVC) using the base layer, the spatial scalable layer, and the FGS layer and setting a sequence number for each packet

Including,

The transmitting of the allocated data packet to the mobile terminal through each access network may include transmitting the sequence number set in the data packet to the mobile terminal through each access network together with the data packet whose format has been changed in setting the sequence number. Method for providing multimedia streaming using multiple networks.
The method of claim 9,

The step of transmitting the allocated data packet to the mobile terminal through each access network is when the access network is a WLAN band and a WiMAX band,

Transmitting the modified QCIF to the base layer and the FGS layer in a WLAN band; And

Transmitting the CIF transformed with the spatial scalable layer and the FGS layer to a WiMAX band to increase the resolution;

Further comprising, a multimedia streaming providing method using multiple networks.
The method of claim 6,

The step of transmitting the data packet of the content to the mobile terminal when using the SCTP protocol

Setting a stream identifier for each stream of multimedia content 301 to be transmitted to different access networks;

Setting a sequence number (SSN) indicating a transmission order for each stream identifier; And

Setting a transmission sequence number (TSN) in a frame to be transmitted through each stream

And transmitting the allocated data packet to the mobile terminal through each access network includes a frame in which the TSN is set in different access networks, and transmits the data packet in which the stream identifier and the SSN are set. Multimedia streaming method using.
A connection information receiver for determining an access network of the mobile terminal according to a content request of the mobile terminal; And,

Content transmission unit for transmitting the data packet of the content to each access network and transmits to the mobile terminal when at least two access network exists

Multimedia streaming server using multiple networks including a.
The method of claim 12,

The connection information receiver,

Receiving a currently available access network and access information of each access network from the mobile terminal, multimedia streaming providing server using multiple networks.
The method of claim 13,

The connection information,

And a link bandwidth of the access network maintaining the connection with the mobile terminal.
The method of claim 12,

The content transmission unit,

Computing the available bandwidth of each access network, allocates the data packet according to the available bandwidth and transmits to the mobile terminal through each access network, multimedia streaming providing server using multiple networks.
The method of claim 15,

The content transmission unit,

Computing the available bandwidth using the link bandwidth of the access network to the mobile terminal, multimedia streaming providing server using multiple networks.
The method of claim 15,

The content transmission unit allocates the data packet of the content to each access network using the RTP protocol, SVC protocol or SCTP protocol to transmit to the mobile terminal, multimedia streaming providing server using multiple networks.
The method of claim 17,

When using the RTP protocol, the content transmitter sets a SSRC (Synchronization Source) value starting with a randomly selected number for the content, and assigns a sequence number to RTP packets of the content using the same SSRC value. And transmitting the SSRC value and the sequence number set in the data packet to the mobile terminal through each access network together with the allocated data packet.
The method of claim 18,

The sequence number is an initial value is a random value, a value that increases by one each time the data packet is transmitted, multimedia streaming providing server using multiple networks.
The method of claim 17,

The content transmitter encodes multimedia content into a base layer when using the SVC protocol, and includes a minimum quality substream and at least one enhancement layer in the base layer. Create a spatial scalable layer, generate an FGS layer that encodes a higher layer as close as possible to each other to follow the network band, and use the base layer, the spatial scalable layer, and the FGS layer The assigned data packet is changed into a format used for transmission in SVC (Scalable Video Coding), a sequence number is set for each packet, and the sequence number set in the data packet together with the changed data packet is transmitted through each access network. Multi transmission using the multiple network to the mobile terminal Streaming media servers provide.
The method of claim 20,

When the access network is a WLAN band and a WiMAX band, the content transmitter transmits the QCIF transformed into the base layer and the FGS layer to the WLAN band, and converts the CIF transformed into the spatial scalable layer and the FGS layer into a WiMAX band. Multistream streaming server to increase the resolution by transmitting to the server.
The method of claim 17,

When using the SCTP protocol, the content transmitter sets a stream identifier for each stream of multimedia content 301 to be transmitted to different access networks, and sets a sequence sequence (SSN) indicating a transmission order for each stream identifier. After setting the transmission sequence number (TSN) in the frame to be transmitted through each stream, and including the frame in which the TSN is set to different access networks, and transmitting the data packet set the stream identifier and the SSN Multimedia streaming server using.
In the multimedia streaming reception method of a mobile terminal having at least two interfaces corresponding to different access networks,

Receiving access information from each access network;

Transmitting access information of the access network to a multimedia streaming providing server according to a content request of a user; And,

Receiving the content by activating each interface corresponding to the access network when transmitting the content through two or more access networks based on the access information of the access network in the multimedia streaming providing server

Multimedia streaming receiving method of a mobile terminal comprising a.
The method of claim 23, wherein

The connection information,

A method for receiving multimedia streaming of a mobile terminal, comprising a link bandwidth maintaining an interconnection.
The method of claim 23, wherein

Receiving the content,

And receiving the data packets of the contents through respective interfaces and combining the received data packets according to the data order.
The method of claim 25,

Receiving the content when using the RTP protocol,

And combining the received data packets based on an SSRC value and a sequence number set in the data packets.
The method of claim 25,

The receiving of the content may include decoding the data packet changed into a format used for transmission in SVC (Scalable Video Coding) when using the SVC protocol, and receiving the data based on a sequence number set in each of the data packets. A method for receiving multimedia streaming of a mobile terminal combining packets.
The method of claim 27,

The receiving of the content may include adding information of the CIF received in the WiMAX band to the QCIF received in the WLAN band and increasing the resolution of the data packet when the access network is the WLAN band and the WiMAX band. How to provide multimedia streaming.
The method of claim 25,

Receiving the content when using the SCTP protocol

And combining the received data packet based on the Stream Identifier set in the data packet and the SSN and the TSN set in the frames included in the data packet.
A mobile terminal having at least two interfaces corresponding to different access networks,

A connection information receiver for receiving connection information from each access network;

An access information transmitter for transmitting access information of the access network to a multimedia streaming providing server according to a content request of a user; And,

Content reception unit for receiving the content by activating each interface corresponding to the access network when the multimedia streaming server transmits content through two or more access networks based on the access information of the access network

Mobile terminal equipped with a multi-interface comprising a.
The method of claim 30,

The connection information,

A mobile terminal with multiple interfaces, comprising link bandwidth to maintain interconnection.
The method of claim 30,

The content receiving unit,

A mobile terminal equipped with multiple interfaces, each receiving a data packet of the content through each interface and combines the received data packet in data order.
33. The method of claim 32,

The content receiving unit is a mobile terminal equipped with a multiple interface for combining the received data packet based on the SSRC value set in the data packet and the sequence number when using the RTP protocol.
33. The method of claim 32,

The receiving of the content may include decoding the data packet changed into a format used for transmission in SVC (Scalable Video Coding) when using the SVC protocol, and receiving the data based on a sequence number set in each of the data packets. Mobile terminal equipped with multiple interfaces for combining packets.
The method of claim 34, wherein

Receiving the content is a multi-interface, when the access network is a WLAN band and WiMAX band, to increase the resolution of the data packet by adding the information of the CIF received in the WiMAX band to the QCIF received in the WLAN band One mobile terminal.
33. The method of claim 32,

Receiving the content includes a multi-interface that combines the received data packet based on the Stream Identifier set in the data packet and the TSN set in the frames included in the data packet when using the SCTP protocol Mobile terminal.