WO2010045830A1

WO2010045830A1 - Method and apparatus for implementing stream media service

Info

Publication number: WO2010045830A1
Application number: PCT/CN2009/073847
Authority: WO
Inventors: 刘轶; 仝庆贻; 龚旭晖
Original assignee: 中兴通讯股份有限公司
Priority date: 2008-10-21
Filing date: 2009-09-09
Publication date: 2010-04-29
Also published as: CN101399836A

Abstract

This invention discloses a method and an apparatus for implementing stream media service, wherein the method comprises: a user equipment establishes a radio bearer with a core network through a radio data card; the user equipment establishes a connection with a stream media server according to the established radio bearer; the user equipment receives stream media data stream from the stream media server and plays the stream media data stream. The experience of users can be improved by the invention.

Description

Stream media service implementation method and device

The present invention relates to the field of communications, and in particular to a method and an apparatus for implementing a streaming media service. BACKGROUND Stream media is a multimedia file transmitted by an application stream technology on a network. The so-called streaming technology is a network in which continuous image and sound information is compressed and placed on the website server, allowing users to watch and listen while downloading, without having to wait until the entire compressed file is downloaded to their own machine. Transmission technology. Streaming media has the following characteristics:

1, can play audio and video and multimedia content in real time, can also be on-demand, interactive;

2, by using the buffer technology, while downloading, while playing;

3. The client receives, processes, and plays back a streaming media file, but the file does not reside on the client, does not occupy the storage space of the client, and is cleared after streaming media processing and playback. Streaming media is a media format that uses variable bandwidth technology to play on the Internet in a "streaming" manner, such as audio, video or multimedia files, enabling people to operate from 28 kbit/s to 1200 kbit/s. Enjoy continuous high quality audio and video programming online. At present, streaming media technology has been widely used in multimedia news release, online live broadcast, online advertising, e-commerce, video on demand, telemedicine, Internet radio, real-time video conferencing and other information on the Internet. Streaming media can be divided into unicast, broadcast and multicast. Among them, unicast means that a separate data channel needs to be established between the client and the media server. The data packets sent from one server can only be transmitted to one. Client computer. Broadcast refers to the passive reception of streaming media by users. During the broadcast process, the client receives streaming media but cannot control streaming media. Multicast (Multicast): Internet Protocol (Internet Protocol) The multicast technology builds a multicast-capable network that allows routers to replicate packets to multiple channels at once. With multicast, a single server can simultaneously send continuous data streams to hundreds of thousands of clients without delay. The media server only needs to send one packet, not multiple; all requesting clients share the same packet. According to the playback mode of streaming media content, it is divided into download and play, on-demand and live broadcast. Download Play: The user downloads and stores the streaming media content to the local terminal, and then can choose to play at any time. Streaming on-demand: The content provider pre-edits, compresses, and compresses a piece of multimedia content to form a file in a specified format, and then stores it on the streaming server. The user selects the content file on the streaming server as needed to play. Streaming media broadcast: When the terminal player plays streaming live content, the content playing time is the same as the content source event. That is, the streaming media encoding server compresses and encodes the content source in real time, and sends it to the user terminal via the streaming server. 1 is a block diagram of a streaming media protocol according to the related art. The protocol composition of a streaming media service is as shown in FIG. 1: The ten-transmission protocol includes: HyperText Transfer Protocol (HTTP) / Transmission Control Ten Control (Transmission Control Protocol) is a User Datagram Protocol (User Datagram Protocol) called UDP. HTTP is mainly used to discover streaming media content and obtain real-time streaming media protocol (Real Time)

Streaming Protocol, called RTSP) The universal resource locator (Uniform Resource Locator) and the Multi-purpose Internet Mail Extension (MIME) parameter can also be directly Obtain the Session Description Protocol (SDP) file. HTTP can also be used to transfer content such as still images and text in streaming media, and is used for audio and video downloads. The HTTP protocol requirements are in accordance with RFC2616 and 3GPP TS 26.234. MIME is the type of file used to mark the transfer. It is mainly used for booting the player in the streaming media.

RTSP mainly establishes session description information (DESCRIBE), establishes streaming media connection (SETUP), content playback (PLAY), connection pause (PAUSE) and connection abort (TEARDOWN) control messages to achieve streaming media session establishment, playback, pause , abort, etc. The RTSP protocol requirements are in accordance with RFC 2326 and 3GPP TS 26.234. The Real Time Transport Protocol (RTP) is mainly used to transport media content such as video, audio and voice in streaming media. The RTP protocol requirements are compliant with RFC3550 and 3GPP TS 26.234. The Real Time Control Protocol (RTCP) is mainly used for traffic control and congestion control between the server and the client. During the RTP session, each participant periodically transmits RTCP packets, which contain statistics such as the number of transmitted packets and the number of lost packets. The server can use this information to dynamically change the transmission rate. RTP works with RTCP to optimize transmission efficiency with efficient feedback and minimal overhead. The RTCP protocol requirements are compliant with RFC3550 and 3GPP TS 26.234.

SDP is a format (protocol) used for session description. It is not a transport protocol, nor is it included in the codec of the media. It is a notification protocol for transmitting messages between different transport protocols. Its main purpose is It is to solve the multimedia session notification, invitation and session initialization work. The SDP file can be passed to the player either by a response to the user's HTTP request or by a response to the user's RTSP DESCRIBE request. The SDP protocol requirements are in accordance with RFC 2327 and 3GPP TS 26.234. At present, Wide Code Division Multiple Access (WCDMA) technology has been widely used in the world. A major advantage of WCDMA technology is that it can provide high-speed packet domain (Packet Switching). For the PS) service, its High Speed Downlink Packet Access (HSDPA) downlink rate can reach 7.2M. For the high rate characteristics of the PS domain, WCDMA wireless data cards have been widely used. However, the functions of the currently used wireless data cards are too numerous, and the main functions are limited to the MODEM Internet access, as well as the short message service (SMS) and voice call. While providing high-speed rates, WCDMA networks also provide users with a wealth of applications. However, current wireless data card users cannot enjoy these rich applications due to the single function of network cards. If you need to enjoy these applications, you need to purchase dedicated applications. The terminal increases the user's overhead. In particular, the business of streaming media is currently limited to telephones (fixed telephones, mobile phones, etc.), and cannot be extended to personal computers (PCs) (desktops or notebooks). At present, an effective solution has not been proposed for the problem that the wireless data card function is not compatible with a variety of applications. SUMMARY OF THE INVENTION The technical problem to be solved by the present invention is that the wireless data card function in the related art cannot be compatible with multiple applications and the application needs to increase the user overhead. Therefore, a streaming media service implementation solution is provided to solve the problem. At least one of the above issues. According to an aspect of the present invention, a streaming media service implementation method is provided. The method for implementing the streaming media service according to the embodiment of the present invention includes: the user equipment establishes a radio bearer with the core network through the wireless data card; the user equipment establishes a connection with the streaming media server according to the established radio bearer; and the user equipment receives the streaming media. The server streams the streaming data and plays the streaming data stream. Preferably, before the user equipment establishes a connection between the established wireless carrier and the streaming server, the method further comprises: the user equipment receiving the session description protocol file of the streaming media data stream from the streaming media server. Preferably, the process for the user equipment to establish a connection with the streaming media server according to the established radio bearer specifically includes: the user equipment establishes a real-time streaming media protocol connection with the streaming media server according to the session description protocol file. Preferably, the processing of the user equipment receiving the streaming media data stream from the streaming media server comprises: the user equipment establishes a real-time streaming protocol connection with the streaming media server, and performs real-time transmission protocol port negotiation with the streaming media server; the user equipment receives the stream from the stream Real-time transport protocol data for the media server. According to another aspect of the present invention, a streaming media service implementing apparatus is also provided. The streaming media service implementation apparatus according to the embodiment of the present invention includes: a radio bearer establishing module, configured to establish a radio bearer with a core network by using a wireless data card; and a connection establishing module, configured to perform radio bearer and flow according to the established data of the user equipment. The media server establishes a connection; the receiving and playing module is configured to receive, by the user equipment, the streaming media data stream from the streaming media server, and play the streaming media data stream. Preferably, the connection establishing module further comprises: a session description protocol file receiving module, a session description protocol file for receiving a streaming media data stream from the streaming media server; a real-time streaming media protocol connection establishing module, configured to receive according to the receiving module The session description protocol file establishes a real-time streaming protocol connection with the streaming server. Preferably, the receiving and playing module specifically includes: a port negotiation module, configured to perform real-time transmission protocol port negotiation with the streaming media server; a data receiving module, configured to receive real-time transmission protocol data from the streaming media server; and a playing module, configured to play Transfer protocol data in real time. According to the above technical solution of the present invention, by using a wireless data card as a wireless load implementation tool to implement a streaming media service, the streaming media data stream received from the wireless data card can be played in the playing area of the computer PC software, thereby improving The user experience and saves the user's expense. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a block diagram of a streaming media protocol structure according to the related art; FIG. 2 is a flowchart of a method for implementing a streaming media service according to an embodiment of the present invention; FIG. ³ is a schematic diagram of a method according to the present invention. FIG. 4 is a block diagram of a streaming media service implementing apparatus according to an embodiment of the present invention; FIG. 5 is a flow through a wireless network card according to an embodiment of the present invention; A block diagram of the media function protocol. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention are described with reference to the accompanying drawings. The present invention provides a streaming media service implementation solution, and the processing principles of the solution are as follows: Considering the problem that the wireless data card function in the related art is not compatible with a plurality of applications and the application of the application is increased. The streaming media service is implemented by using the wireless data card as a wireless implementation tool, and the streaming data stream received from the wireless network card is parsed and played in the playing area of the computer PC software, so that the function of the streaming media service can be realized in the PC. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. In the following embodiments, the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and although the logical order is illustrated in the flowchart, in some cases The steps shown or described may be performed in an order different from that herein. Method Embodiments According to an embodiment of the present invention, a streaming media service implementation method is provided. 2 is a flowchart of a method for implementing a streaming media service according to an embodiment of a method according to the present invention. As shown in FIG. 2, the method includes: (Steps S202-S206): Step S202: A user equipment establishes a radio bearer with a core network by using a wireless data card. For the wireless data card (wireless network card), it is required to support the PS domain call service, and an interface module of the same network card PC software is required on the network card side, which is responsible for parsing the commands sent by the PC software and transmitting and receiving the data of the streaming media. On the PC software of the network card, an operation interface needs to be provided to the user, and the user can initiate a streaming media service through the operation interface. And the streaming media data stream received from the wireless network card can be parsed and played in the playing area of the computer PC software. Step S204: The user equipment establishes a connection with the streaming media server according to the established radio bearer. Step S206: The user equipment receives the streaming media data stream from the streaming media server, and plays the streaming media data stream. The following describes the specific processing procedure of step S204 and step S206 in detail by taking the RTSP/RTP-based on-demand and live streaming media service flow as an example, and FIG. 3 is a preferred embodiment of the RTSP/RTP-based streaming media service according to the method embodiment of the present invention. Process flow chart. As shown in Figure 3, a successful call flow mainly includes the following four phases: content discovery, connection establishment, content playback, and connection suspension. The process includes the following processing: Content discovery step S302, the user operation triggers the network card to complete the establishment of the wireless load. For example, browse the web. Step S304, the user clicks on a certain streaming media content on the portal through the PC, and the browser sends the content to the portal. From the HTTP Get command (including user agent, User Agent). The mouth-of-mouth browser obtains the RTSP link of the streaming media content from the web server through the HTTP 200 OK response message, and the user clicks the link, and the PC software of the network card activates the streaming media player. If the browser obtains the HTTP link of the SDP file from the web server through the HTTP 200 OK response message, and the user clicks the link, the PC software of the network card requests the SDP file from the streaming server. The server returns the SDP file, obtains the RTSP link of the streaming media content, and the PC software of the network card activates the streaming media player. The connection establishment step S306 acquires session description information (DESCRIBE).

The player on the PC software side requests the SDP through the DESCRIBE command of the RTSP protocol. The server provides the description information of the streaming media content in the response. The SDP text message tells the player the multimedia session information, which mainly includes: the protocol version. Creator and session ID, session name, session activation time, media name transfer address, and other information. If the server has returned an SDP file via an HTTP response, the player no longer sends a DESCRIBE request. Step S308, establishing a streaming media connection (SETUP).

The player on the PC software side establishes an RTSP connection with the media server according to the information of the SDP. The SETUP message must include the session identifier and the transport protocol (RTP) port number of the player. After receiving the information, the media server provides the RTP port number of the response server, and finally completes the dynamic 1" business of the RTP port. Content Play (PLAY) Step S310, the player on the PC software side issues a play command in the RTSP to the server side. The PLAY message must include a session identifier, a time start point, a media server session identifier, and a media play time. Step S312: The media server transmits the media content to the player of the PC software through the RTP. The network card is only a wireless bearer function. All the received RTP data is forwarded to the streaming media player of the PC software. After receiving the RTP data of the streaming media, the PC software decodes and plays the RTP data. The connection is aborted (TEARDOWN) Step S314, after the normal playing of the media is completed, or when the user actively suspends playing or actively closes the player (excluding the user to pause playing), the streaming media player on the PC software side must issue an abort command in the RTSP protocol to the server. Including the session ID and other information, the server receives a 200 OK response after receiving it. With the above embodiments, the streaming media service is implemented by using the wireless data card as an implementation tool of the wireless bearer, and the streaming media service can be implemented on the PC. Apparatus Embodiments According to an embodiment of the present invention, a streaming media service implementing apparatus is also provided. 4 is a block diagram of a streaming media service implementation apparatus according to an embodiment of the present invention. As shown in FIG. 4, the streaming media service implementation apparatus according to the embodiment of the present invention includes: a radio bearer establishing module 10, configured to The data card establishes a radio bearer with the core network; the connection establishing module 20 is connected to the radio bearer establishing module 10, and is configured to establish a connection between the user equipment and the streaming media server according to the established radio bearer; and the receiving and playing module 30 is connected to the connection establishing module 20 And for the user equipment to receive the streaming media data stream from the streaming server, and play the streaming media data stream. In a specific implementation process, the connection establishing module 20 may include: a session description protocol file receiving module (not shown), a session description protocol file for receiving a streaming media data stream from the streaming media server; a real-time streaming media protocol connection establishing module (not shown), configured to establish a real-time streaming protocol connection with the streaming server according to the session description protocol file received by the receiving module. The receiving and playing module 30 specifically includes: a port negotiation module (not shown) for performing real-time transmission protocol port negotiation with the streaming server; and a data receiving module (not shown) for receiving real-time from the streaming server Transmission protocol data; a playback module (not shown) for playing real-time transport protocol data. The deployment scheme of each of the above modules in the PC terminal will be described in detail below. FIG. 5 is a structural block diagram of a streaming media function protocol stack implemented by a wireless network card according to an embodiment of the present invention. As shown in FIG. 5, in this implementation, the implementation of the streaming media is divided into four parts according to the module. Part A is a multimedia function that is ported from the terminal side supporting streaming media to the PC side, part In principle, B can be implemented by using the protocol stack on the network card. Considering the processing efficiency in the application process, it is recommended that this part be also implemented on the PC side. Part C is a control interface module on the same PC side that is added to the network card in order to implement the streaming function. Part D establishes a ten-party part for the wireless bearer of the network card itself. Part A includes: Module 1 (Video, Audio, Speech Resolution Playback and Corresponding Link Status Reporting), Module 2 (Implementing Capabilities Exchange, Scene Description, Still Images, Bitmaps, Vectors, Text, Synchronized Text, Composite Audio) ), Module 3 (Complete Control Message, Session Description (SDP)). This part needs to be implemented on the PC software side corresponding to the wireless network card. Part B is the ten-party part of streaming media, including RTP/RTCP, HTTP and RTSP. The content of this part of the protocol can be implemented on the PC software side or on the network card. Considering the processing efficiency in the application process, it is implemented in the PC software in this solution. Part C is the transport protocol part, including the UDP, TCP and IP protocol parts. This part can take advantage of the existing protocol stack of the network card, or use a separate protocol stack in the PC software. Considering the processing efficiency in the application process, separate UDP, TCP and IP protocols are used on the PC software side. Part D is mainly a network card control interface module for analyzing the control commands sent by the PC side to increase the streaming media function on the PC side. Part E is the functional module of the network card itself. In summary, according to the above technical solution of the present invention, the streaming media service is implemented by using the wireless data card as an implementation tool of the wireless bearer, and the streaming media data received from the wireless data card can be streamed in the playing area of the computer PC software. Play, which improves the user experience and saves the user's expense. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or they may be Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Various modifications and variations of the present invention are possible in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A method for implementing a streaming media service, comprising:

The user equipment establishes a radio bearer with the core network through the wireless data card;

And the user equipment establishes a connection with the streaming media server according to the established radio bearer; the user equipment receives the streaming media data stream from the streaming media server, and plays the streaming media data stream.

The method according to claim 1, wherein before the processing of the connection between the user equipment and the streaming server according to the established wireless device, the method further includes:

The user equipment receives a session description protocol file of the streaming media data stream from the streaming media server.

The method according to claim 2, wherein the processing of the user equipment establishing a connection with the streaming media server according to the established radio bearer specifically includes:

And the user equipment establishes a real-time streaming protocol connection with the streaming media server according to the session description protocol file.

The method according to claim 3, wherein the processing by the user equipment to receive the streaming media data stream from the streaming media server comprises:

The user equipment establishes a real-time streaming protocol connection with the streaming media server, and performs real-time transmission protocol port negotiation with the streaming media server;

The user equipment receives real-time transport protocol data from the streaming server.

A device for implementing a streaming media service, comprising:

a wireless device establishing module, configured to establish a wireless connection with the core network by using a wireless data card; and a connection establishing module, configured to establish, by the user equipment, the connection between the wireless bearer and the streaming media server according to the established wireless bearer;

And a receiving and playing module, configured to receive, by the user equipment, a streaming media data stream from the streaming media server, and play the streaming media data stream.

The device according to claim 5, wherein the connection establishing module further comprises:

a session description protocol file receiving module, configured to receive a session description protocol file of the streaming media data stream from the streaming media server;

And a real-time streaming media protocol connection establishing module, configured to establish a real-time streaming media protocol connection with the streaming media according to the session description protocol file received by the receiving module.

The device according to claim 6, wherein the receiving and playing module specifically comprises:

a port negotiation module, configured to perform real-time transmission protocol port negotiation with the streaming media server;

a data receiving module, configured to receive real-time transport protocol data from the streaming media server;

a playing module, configured to play the real-time transport protocol data.