WO2011017982A1

WO2011017982A1 - System, method and terminal for processing media services

Info

Publication number: WO2011017982A1
Application number: PCT/CN2010/074249
Authority: WO
Inventors: 熊勤
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-08-12
Filing date: 2010-06-22
Publication date: 2011-02-17
Also published as: CN101626387B; CN101626387A

Abstract

The present invention discloses a system, method and terminal for processing media services. The system includes: a relay module (12), used for receiving a code stream of media content, and transmitting the code stream to one or multiple media service modules (14) in a multicast mode; and one or multiple media service modules (14), used for receiving a media service request from the terminal (1), converting the code stream transmitted in the multicast mode from the relay module (12), and transmitting the code stream to the terminal (1) in a unicast mode. With the present invention, providing media services for large-scale user terminals is realized.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a media service processing system, method, and terminal. BACKGROUND OF THE INVENTION Streaming media technology provides a way to transmit media content such as video, audio, and pictures in a network. Therefore, it is widely used in multimedia service systems, especially mobile multimedia service systems. At the same time, with the development of telecommunication network technology, multimedia services are carried out in telecommunication networks. For example, Internet Protocol TV (IPTV) network television, video surveillance, mobile TV, mobile phone download and other multimedia services have gradually become a kind of trend. In a mobile streaming service system, generally, a central streaming media platform and a plurality of edge streaming media platforms are deployed. The central streaming media platform includes all content and media live stream, and the edge streaming platform needs to stream the media content. The central streaming media platform relays, and then provides on-demand and live broadcast services to users of the edge streaming media platform. When the physical span of the central streaming media platform and the edge streaming media platform is relatively large, the media stream of the central streaming media platform can only be sent to the edge streaming media platform through unicast. In the related art, the user terminal device accesses the service system through the wireless network. Due to the limitation of the capability of the user terminal device, the packet transmission of the user terminal and the core network device is not suitable for the multicast 4 message transmission mode, or If the user terminal is in a network environment that cannot receive multicast, the unicast mode is usually used when the user needs to receive the media code stream of the core network device. However, in the related art, the edge streaming media platform cannot relay and amplify the media code stream, and sends the code stream to the terminal in a unicast manner, thereby providing services to large-scale users. SUMMARY OF THE INVENTION In the related art, in the environment where the system networking span is relatively large and the user access network transmission capacity is limited, the problem of solving the problem of relaying and amplifying the media code stream to provide a large-scale user with a monthly service is proposed. The present invention, for this reason, is a main object of the present invention to provide a media service processing solution to solve at least one of the above problems. In order to achieve the above object, according to an aspect of the present invention, a media service processing system is provided. The media service processing system according to the present invention includes: a relay module, configured to receive a code stream of the media content, and send the code stream to one or more media monthly service modules by multicast; one or more media services And a module, configured to receive a media service request from the terminal, and convert the multicast stream sent from the relay module in a multicast manner and send the code stream to the terminal in a unicast manner. Preferably, the system further includes: a user access control module, configured to receive a redirect request from the terminal, select a media service module for providing a code stream to the terminal from one or more media service modules, and select The information of the media service module is sent to the terminal. Preferably, the user access control module is specifically configured to select a media service module for providing a code stream to the terminal according to the capabilities of the media service modules in the one or more media service modules, where the capabilities include: a load condition of the media service module . Preferably, the system further includes: a media content unicast source module, configured to send the code stream of the media content to the relay module in a unicast manner. Preferably, the relay module comprises two network planes, one network plane is connected with the media content unicast source module, and the other network plane is connected with one or more media service modules. In order to achieve the above object, according to another aspect of the present invention, a terminal is provided. The terminal according to the present invention includes: a sending module, configured to send a redirection request to the user access control module, to obtain information of a media service module selected by the user access control module from one or more media service modules; And a second sending module, configured to send a media service request to the media service module indicated by the information, to establish a media communication session, and a second receiving module, configured to receive The code stream from the media service module of the information indication. In order to achieve the above object, according to still another aspect of the present invention, a media service processing method is provided. The media service processing method according to the present invention includes: the relay module receives a code stream of the media content transmitted in a unicast manner; the relay module converts the code stream and multicasts the code stream to one or more media by means of multicast The service module receives the media service request from the terminal, and sends the code stream to the terminal by means of unicast. Preferably, before the media service module receives the media service request, the method further includes: after receiving the redirect request from the terminal, the user access control module selects one of the one or more media service modules for providing the terminal to the terminal. The media service module of the code stream sends the information of the selected media server to the terminal. Preferably, selecting a media service module for providing a code stream to the terminal comprises: the user access control module selecting, according to the capability of the media service module, a media service for providing a code stream to the terminal from one or more media service modules. The module, where the capabilities include: The load condition of the media service module. Preferably, after the information of the selected media server is sent to the terminal, the method further includes: after receiving the information about the media service module selected by the access control module, the terminal sends the media service to the media service module indicated by the information. Requesting, and receiving a stream of code from the media service module indicated by the information. Through the invention, the media code stream is sent to the media service module through the multicast by using the relay module, and the media service module is sent to the terminal through the unicast mode, which solves the problem that the system span is relatively large, and the user access network transmission capability is affected by The problem of relaying and amplifying the unicast media code stream in a limited environment, thereby achieving the effect of providing media services to large-scale user terminals. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a structure of a media service processing system according to an embodiment of the present invention; FIG. 2 is a block diagram showing a specific structure of a media service processing system according to an embodiment of the present invention; FIG. 4 is a block diagram of a media service processing system according to an embodiment of the present invention; FIG. 5 is a block diagram showing a specific structure of a media service processing system according to an embodiment of the present invention; FIG. 7 is a flowchart of performance reporting of a streaming media server according to an embodiment of the present invention; FIG. FIG. 8 is a flow chart of user-on-demand according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention provide that a unicast source of content sends a content code stream to a relay module in a unicast manner; the relay module multicasts on a restricted multicast address in the core network. The content code stream, the code stream is pushed to all the streaming media servers; the user terminal module sends a service request to the user access control module; the user access control module assigns a media service module to the user, and redirects the user request to the media The service module; the user terminal module interacts with one of the media service modules, and receives the content unicast code stream sent by the media service module. 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 shown in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some In this case, the steps shown or described may be performed in a different order than the ones described herein. System Embodiments According to an embodiment of the present invention, a media service processing system is provided. FIG. 1 is a structural block diagram of a media service processing system according to an embodiment of the present invention. As shown in FIG. 1, the system includes: a relay module 12 One or more media service modules 14, which are described in detail below. The relay module 12 is configured to receive a code stream of the media content of the media service, and send the code stream to one or more media service modules by using a multicast manner. The module will be described in detail below. The relay module 12 provides a relay forwarding function of the unicast code stream, and the relay module receives the content unicast code stream of the media, and converts the unicast code stream of the media content into the multicast code stream, and is limited in the core network. The multicast mode sends the multicast code stream of the content to all media service modules, and the relay module 12 is distributed on the core network plane. One or more media service modules 14 are connected to the relay module 12 for receiving a media service request from the terminal, and transmitting the code stream from the relay module to the terminal by means of unicast. The module will be described in detail below. The media service module 14 may receive the content multicast code stream forwarded by the relay module 12 in a multicast manner, and use a buffer of a certain size to save the multicast code stream of the content; for the terminal, the media monthly service module is used for processing The media service request of the terminal, and the media service function can be provided to the terminal in a unicast manner, and the form of the media service function may include but is not limited to the following: media video on demand, media video live broadcast, file download, personal recording, real-time data transmission When a plurality of media service modules are included in the system, each media service module is used as a managed device, and is also used to report the capability of the user to the control module, and the capability may include a load condition of the media service module, where The load situation may include, but is not limited to, the number of user terminals currently serving, network bandwidth, and the like. The media monthly service module is at the edge of the core network plane and interacts with the terminal. The foregoing relay module 12 and one or more media server modules 14 constitute an edge streaming media platform. FIG. 2 is a structural block diagram of a media service processing system according to an embodiment of the present invention. As shown in FIG. 2, the system further includes : a media content unicast source module (also referred to as a content unicast source module) 22 , the module is a source of a content unicast stream, and the function is to encode the media content into a code stream that can be transmitted using a real-time transport protocol, and The code stream is sent to the relay module, and the unicast source module is distributed on the core network plane. The user access control module 24, the terminal and the media service module 24 are connected to the user access control module 24, for receiving a redirect request from the terminal, and selecting one of the one or more media service modules for providing the code stream to the terminal The media service module sends the information of the selected media service module to the terminal. The module will be described in detail below. The user access control module 24 performs access control on the terminal in the system, is used to receive a service redirection request of the terminal, and allocates a media service module for providing the service to the terminal; for multiple media service modules in the core network The user access control module is configured to receive the capability of the media service module, and perform load balancing according to the capabilities of the media service modules. The user access control module is at the edge of the core network plane and interacts with the user terminal module. The device embodiment provides a terminal according to an embodiment of the present invention. FIG. 3 is a structural block diagram of a terminal according to an embodiment of the present invention. As shown in FIG. 3, the terminal includes: a sending module 32, a receiving module 34, and a second The transmitting module 36 and the second receiving module 38 will be described in detail below. The sending module 32 is configured to send a redirection request to the user access control module 24 to obtain information of a media service module selected by the user access control module 24 from the one or more media service modules 14; the receiving module 34 is connected to The sending module 32 is configured to receive information from the media service module selected by the user access control module 24; the second sending module 36 is connected to the receiving module 34, configured to send a media service request to the media service module 14 indicated by the information; The receiving module 38 is coupled to the second transmitting module 36 for receiving the code stream from the media service module 14 indicated by the information. The sending module 32, the receiving module 34, the second sending module 36, and the second receiving module 38 may be collectively referred to as a user terminal module, and the module sends a media redirection request to the user access control module to obtain the media allocated by the user access control module. After the information of the service module, the user terminal module sends a media service request to the media service module, and can receive the unicast code stream sent by the media service module, where the user terminal module belongs to the user network plane, and performs the user access control module and the media service module. Interaction. Method Embodiments According to an embodiment of the present invention, a media service processing method is provided. FIG. 4 is a flowchart of a media service processing method according to an embodiment of the present invention. As shown in FIG. 4, the method includes the following step S402. Step S404: Step S402: The media service module receives a code stream of the media content sent by the relay module by means of multicast. Step S404: The media service module receives the media service request from the terminal, and sends the code stream to the terminal by means of unicast. Before the step S402, the relay module receives the code stream of the media content that is sent in a unicast manner, and converts the code stream to the one or more media service modules by means of multicast. Before the media service module receives the media service request from the terminal, the user access control module selects a media service module for providing a code stream to the terminal from one or more media service modules after receiving the redirect request from the terminal. And send the information of the selected media server to the terminal. The user access control module selects a media service module for providing a code stream to the terminal from the media service module according to the capability of the media service module. That is, the media service module sends the capability of the media service module to the user access control module, where the capability may include a load condition of the media server, where the load situation may include but is not limited to one of the following: Number of user terminals, network bandwidth, etc. After the terminal obtains the information of the selected media server, the terminal sends a redirect request to the user access control module to obtain information of the media service module selected by the user access control module; the terminal receives the media selected by the access control module. After the information of the service module, the media service request is sent to the media service module indicated by the information, and the code stream of the media service module indicated by the information is received. The present embodiment will be described in detail below in conjunction with the media service processing system of FIG. 2. Step S201: The content unicast source module 22, as a source of the media content unicast code stream, encodes the media content into a code stream that can be transmitted using a real-time transmission protocol, and sends the code stream to the relay module 12. Step S202, the relay module 12 receives the content unicast code stream sent from the unicast source module, and converts the unicast code stream of the media content into a multicast code stream, and places the content in a restricted multicast manner in the core network. The multicast stream is sent to all media service modules 14, and the feature of restricted multicast is that network packets are only sent in the core network plane. All media service modules 14 in the system join the restricted multicast, receive the content multicast stream sent by the relay module 12, and use a certain size of the cache to save the multicast stream of the content. In step S203, all the media service modules 14 in the system periodically report their performance parameters to the user access control module 24, and the performance parameters are used to indicate to the user access control module 24 the current performance consumption level of each media service module 14. As the basis for user access load balancing. Step S204: The user access control module 24 collects media performance parameters reported by all media modules and saves them. Step S205, the user access control module 24 waits to receive the redirect request from the user, and at the same time, all the media service modules 14 in the system wait to receive the user media service request. The following step 4 is a process of obtaining a media code stream for the terminal. Step S206, the user terminal module sends a media service redirection request to the user access control module 24. Step S207, the user access control module 24 selects a media service module 14 with the best performance according to the performance parameters of all the media service modules 14 in the current system, and provides the user terminal module. Returning the redirect response, the redirect response returns the information of the media service module 14 to the user terminal module. Step S208, the user terminal module receives the redirect response returned by the user access control module 24, and obtains information of the media service module 14 in the redirect response. Step S209: The user terminal module sends a media service request to the media service module 14, performs message interaction with the media service, and establishes a communication link and a control session of the unicast code stream. Step S210, the media monthly service module 14 converts the multicast content code stream saved in the buffer into a unicast mode code stream, and sends the unicast code stream of the content to the user terminal module. Step S211, the user terminal module receives the unicast code stream of the content sent by the media service module 14, and performs certain processing on the code stream of the content. The processing manner may include, but is not limited to: decoding and decompressing the code stream and converting the video stream into a video. The signal, the saved code stream is a local file, etc., and the user terminal module processes the code stream and displays it as a different media service. Step S212, the user terminal sends a media service end request to the media service module 14, interacts with the media service module 14, and closes the unicast code stream communication link and the control session of the content. Step S213, the media service module 14 stops transmitting the unicast code stream of the content, and the media service ends. Through the above steps, in the core network plane, only the unicast code stream of one content is introduced, and after the relay module 12 forwards to the media service module 14 at the edge of the network, all the media service modules 14 can provide the user terminal module. The media service, at the same time, introduces the user access control module 24 to load balance the media service requests of the user terminals, thereby providing the capability of providing media services to large-scale users; the system can deploy different numbers of media according to the size of the users. Service module 14, so the system has good capacity expansion; the user terminal module in the user network plane and the media service module 14 at the edge of the core network establish a media communication link of the unicast code stream, and receive the media in a unicast manner. The code stream, so in the network environment where the user network is limited and the user terminal module cannot receive the multicast, the user terminal can also use the media service; the multicast message sent by the relay module 12 is only forwarded in the core network plane. User terminal module of user network plane cannot receive multicast Wen, therefore, even the issue of access to user Pirates of the multicast stream does not exist. The implementation process of the embodiment of the present invention will be described in detail below with reference to examples. FIG. 5 is a structural block diagram of a media service processing system according to an embodiment of the present invention. As shown in FIG. 5, the system includes: a content unicast source server (Content Unicast Server, simple ^ CUS) (the above-mentioned media content unicast source module), a relay server (Relay Server, abbreviated as RS) (that is, the above-mentioned relay module), and a streaming server (Stream Server, abbreviated as SS) 1, SS2 SS3, a User Access Control Server (UACS) (ie, the user access control module described above), and a User Equipment (UE). The content unicast source server includes a Real Transfer Stream Protocol (RTSP) sub-module and a unicast sending module. The relay server includes: an RTSP sub-module, a code stream receiving module, and a code stream. The conversion module and the multicast sending module; the streaming media server (that is, the media service module described above) includes: a multicast stream receiving module, a code stream converting module, a performance reporting module, a code stream sending module, and an RTSP submodule; user access control The server includes: a performance collection module and an RTSP sub-module; the user terminal includes an RTSP sub-module, a code stream receiving module, and a code stream processing module. For a more detailed description, in the present embodiment, the content unicast source uses the User Datagram Protocol (UDP)/Real-time Transport Protocol (RTP) protocol to send content. The unicast code stream, the code stream encoding format uses the 3GP format; the relay server interacts with the content unicast source through the RTSP protocol, establishes a channel for unicast code stream transmission, and receives the UDP/RTP unicast code of the content unicast source. After the stream, the unicast stream is converted into a UDP/RTP multicast stream and sent to all streaming servers; the streaming server receives the content stream in multicast UDP/RTP mode, and the multicast stream is restored to UDP. /RTP unicast mode; the user terminal interacts with the streaming server through the RTSP protocol to establish a unicast code stream sending channel, and the streaming media sends the content code stream to the user terminal through the UDP/RTP unicast mode to provide the streaming media service. The media service processing method (also referred to as unicast stream amplification) provided by the foregoing implementation includes the following three aspects: a code stream relay forwarding process, a streaming media server performance process, a user on-demand process, and the following These three aspects are explained separately. FIG. 6 is a flowchart of code stream relay forwarding according to an embodiment of the present invention. As shown in FIG. 6, the process includes the following steps: Step S601: The relay server sends an RTSP to the content stream source server CUS. The processing module sends an RTSP Description (DESCRIBE) message. Step S602, the content code stream source server returns an RTSP 200 response to the relay server. Step S603: The relay server sends an RTSP establishment (SETUP) message to the content code stream source server. Step S604, the content code stream source server sends an RTSP 200 response to the relay server. Step S605: The relay server sends an RTSP play (PLAY) message to the content source. Step S606, the content code stream source server sends an RTSP 200 response to the relay server. Step S607, the content code stream source server encodes the content into a 3GP code stream format, and sends the content to the relay server in a unicast UDP/RTP manner. Step S608, the code stream receiving submodule of the relay server receives the unicast UDP/RTP code stream sent by the content code stream source server, and then converts the unicast UDP/RTP code stream into multicast by the code stream conversion module of the relay server. In the UDP/RTP stream mode, the multicast stream sending module of the trunk server transmits the multicast UDP/RTP text in the multicast address IP. Step S609, the code stream receiving modules of all the streaming media servers SS1, SS2, SS3 join the multicast group with the same IP in step S607, receive the multicast UDP/RTP code stream, and then the code stream conversion module will multicast UDP. The /RTP stream is converted to a unicast UDP/RTP stream format. FIG. 7 is a flowchart of performance reporting of a streaming media server according to an embodiment of the present invention. As shown in FIG. 7, the process includes the following steps: Step S701: Performance reporting modules of all streaming media servers SS1, SS2, SS3 and The user access control server UACS performance set establishes a TCP link. Step S702, all the streaming media servers SS1, SS2, SS3 periodically send the user access control server the performance parameters C1, C2, C3 of the streaming media server, and the information necessary for providing the media service of the current streaming media, for example, IP address and RTSP listening port. Step S703, the user access control servers SS1, SS2, and SS3 receive the performance parameters of the respective streaming media servers, and save the performance parameters of the streaming media servers SS1, SS2, and SS3, and select the lightest-loaded streaming media as the step S801. in accordance with. FIG. 8 is a flowchart of user on-demand according to an embodiment of the present invention. As shown in FIG. 8, the process includes the following steps: Step S801: The user access control server UACS starts RTSP interception, and waits for receiving RTSP redirection of the UE. request. Step S802, the RTSP interception of the streaming media server SS 1, SS2, and SS3 is waited for. The RTSP media request for the user terminal. Step S803: The UE sends a media service redirection request to the user access control server UACS, and the request is a DESCRIBE message of the RTSP protocol. Step S804, the user access control server UACS saves the performance parameters C1, C2, and C3 of each streaming media server according to step 303. Here, it is assumed that the performance parameter C2 of the streaming media SS2 is the lightest load when the user terminal UE requests the service, and the UACS is The user terminal UE selects the streaming server with the lightest SS2 load. Step S805, the user access control server UACS returns a media service redirection response to the user terminal UE, and the RTSP state code is 302 in the response, and the Location field in the response includes the streaming server SS2 that selects the lightest load in the step S400 to provide the media service. Information. Step S806, the user terminal UE sends an RTSP DESCRIBE message to the RTSP sub-module of the streaming server SS2. Step S807, the RTSP sub-module of the streaming media server SS2 returns an RTSP 200 response to the RTSP sub-module of the user terminal UE. Step S808, the user terminal UE sends an RTSP to the RTSP submodule of the streaming media server SS2.

SETUP message. Step S809, the RTSP sub-module of the streaming media server SS2 sends an RTSP 200 response to the user terminal UE. Step S810, the user terminal UE sends an RTSP PLAY message to the RTSP sub-module of the streaming media server SS2. Step S811, the RTSP sub-module of the streaming media server SS2 sends an RTSP 200 response to the user terminal UE. In step S812, the code stream sending module of the streaming media server SS2 sends the unicast UDP/RTP code stream message generated by the code stream converting module in step 208 to the code stream receiving module of the user terminal UE. Step 4: S813, the code stream processing module of the user terminal UE processes the unicast code stream, and the processing manner may include decoding, decompressing, and performing analog-to-digital conversion to convert the code stream of the UDP/RTP packet format into a video signal. display. Step S814, the RTSP sub-module of the user terminal UE sends an RTSP teardown (TEARDOWN) message to the RTSP sub-module of the streaming media server SS2. Step S815, the code stream sending module of the streaming server SS2 stops sending the unicast code stream to the user terminal UE, and the RTSP sub-module of the streaming media server SS2 returns the RTSP 200 response to the user terminal UE. It should be noted that, in this embodiment, the user access control server not only receives and processes the performance report message of the streaming media server, but also provides the access control load balancing service for the user. In practical applications, the user accesses the controller. It can be divided into two modules to be deployed separately, one for the load balancing server of the streaming media, one for the user access gateway, the user terminal only interacts with the user access gateway, and the media redirection message is forwarded by the user access gateway to the load balancing server of the streaming media. . Modifications and variations are also within the scope of the invention. It should be noted that, in this embodiment, the protocol for performing media signaling interaction between the RSCUS, the UE, the user access control server UACS, and the user terminal and the streaming media server is RTSP, but is not limited thereto. The protocol is an IETF standard protocol. , you can also use other media interaction protocols. It should be noted that, in this embodiment, the encoding format of the multicast channel is 3GP format, but is not limited thereto. In practical applications, an alternative media encoding format may also be used, for example, MPEG-4, 3GPP2, H. 264 and so on. Preferably, on the basis of the solution provided by the embodiment of the present invention, the following extensions can be made: the relay module is set up with two network planes, one network plane is connected with the media content unicast source module, and the other one is a network plane and multiple The media service modules are connected, so that the content unicast source module can be transmitted through the VPN (Virtual Private Network) network, and the media code stream of the content unicast source module can be more securely protected from being stolen. In summary, according to the foregoing embodiment, the media service can be provided to a large-scale user terminal, and the user terminal with limited access capability of the access network and unable to receive the multicast code stream can also access the media service network and use the service. There is no multicast packet when the user accesses the network plane, and there is no problem that the user steals the multicast stream. 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 for execution by the computing device, or They are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A media service processing system, comprising:

a relay module, configured to receive a code stream of the media content, and send the code stream to one or more media service modules by multicasting;

The one or more media service modules are configured to receive a media service request from the terminal, and convert the multicast stream sent from the relay module in a multicast manner and send the code stream to the terminal in a unicast manner. .

2. The system according to claim 1, further comprising:

a user access control module, configured to receive a redirect request from the terminal, select a media service module for providing the code stream to the terminal from the one or more media service modules, and select The information of the media service module is sent to the terminal.

The system according to claim 2, wherein the user access control module is specifically configured to select, according to the capabilities of each media service module in the one or more media service modules, to provide the terminal The media service module of the code stream, where the capability includes: a load condition of a media service module.

The system according to any one of claims 1 to 3, further comprising:

And a media content unicast source module, configured to send the code stream of the media content to the relay module in a unicast manner.

The system according to claim 4, wherein the relay module comprises two network planes, one network plane is connected to the media content unicast source module, another network plane and the one or Multiple media monthly service modules are connected.

6. A terminal, characterized in that it comprises:

a sending module, configured to send a redirect request to the user access control module, to obtain information about a media service module selected by the user access control module from one or more media service modules;

a receiving module, configured to receive information from the media service module selected by the user access control module; a second sending module, configured to send a media service request to the media service module indicated by the information, to establish a media communication session;

And a second receiving module, configured to receive a code stream from the media service module indicated by the information. A media service processing method, comprising: a relay module receiving a code stream of media content sent in a unicast manner;

The relay module converts the code stream and sends the code stream to one or more media service modules in a multicast manner;

The media processing module receives a media service request from the terminal, and sends the code to the terminal in a unicast manner. The method according to claim 7, wherein before the media service module receives the media service request, the method further includes:

After receiving the redirection request from the terminal, the user access control module selects, from the one or more media monthly service modules, a media service module for providing the code stream to the terminal, and Sending the selected information of the media server to the terminal. The method according to claim 8, wherein selecting a media service module for providing the code stream to the terminal comprises:

The user access control module selects, according to the capability of the media service module, a media service module for providing the code stream to the terminal from the one or more media service modules, where the capability includes : The load situation of the media service module. The method according to claim 9, wherein after the information of the selected media server is sent to the terminal, the method further includes:

After receiving the information about the media service module selected by the access control module, the terminal sends a media service request to the media service module indicated by the information, and receives a media service module from the information indication. The code stream.