CN100440784C - Digital Subscriber Line Access Multiplexer and Streaming Media Data Transmission System and Method - Google Patents

Abstract

The invention relates to a digital subscriber line access multiplexer, which includes a main control module, an equipment management interface module connected with the main control module, and a media server connected with the equipment management interface module. It also relates to a streaming media transmission system, including: several streaming media servers; several digital subscriber line access multiplexers connected to the several streaming media servers through a backbone network; several streaming media receiving terminals connected through An access network is connected to the digital subscriber line input multiplexer. It also relates to a streaming media transmission method, comprising: the digital subscriber line access multiplexer receives the streaming media data sent by the streaming media server through the backbone network; the digital subscriber line access multiplexer processes the received streaming media data Send it to the streaming media receiving terminal through the access network. Therefore, the digital subscriber line access multiplexer of the present invention realizes the monitoring of streaming media data, the streaming media transmission system and transmission method, and realizes live broadcasting through a simple structure.

Description

Digital Subscriber Line Access Multiplexer and Streaming Media Data Transmission System and Method

technical field

The invention relates to a digital subscriber line access multiplexer and streaming media data transmission system and method, in particular to a digital subscriber line access multiplexer and streaming media data transmission system and method capable of providing streaming media data processing.

Background technique

Streaming media technology is a technology for transmitting and implementing multimedia. The receiving terminal can play it after obtaining part of the media content. It does not need to receive all the media data completely, but only needs to continue to obtain media data through the network during the playback process. , continue playing. Asymmetrical Digital Subscriber Line (ADSL) is a technology that can provide broadband data services through ordinary telephone lines.

With the development of the times, there has emerged a service based on IP broadband network for multimedia transmission - IPTV, also known as "broadband TV", and the IPTV service is realized based on streaming media technology. The characteristics of streaming media technology make it possible to transmit real-time multimedia on the network. The transmission of streaming media involves servers, transmission equipment and terminals. Because the technical feature of ADSL is that the upstream traffic is small, while the downstream traffic is large, it is very suitable for IPTV services. In addition, ADSL access is also the most common access method. At the central office, the Digital Subscriber Line Access Multiplexer (Digital Subscriber Line Access Multiplexer, DSLAM) is the main transmission device for ADSL user aggregation. It forwards data between ADSL users and the backbone network. The current DSLAM capacity It is getting bigger and bigger, and its functions are getting stronger and stronger, and it even has the function of some switches. Video over ADSL has become a common networking configuration requirement. The main business mode of IPTV is live video broadcast, supplemented by on-demand mode.

The existing DSLAM cannot monitor streaming media data. The existing streaming media transmission system is composed of multiple streaming media servers into a cluster, which is placed in the data center to provide services for users in different network topologies. The existing networking method The disadvantage is that because the streaming media server is located in the data center, all network devices in the entire network must support the multicast function, so the network structure is relatively complicated, and there must be a large number of streaming media servers in the network center, and the pressure of data processing is very high. Caused the existing streaming media transmission method to be more loaded down with trivial details. Moreover, in the existing streaming media transmission system and transmission method, due to the centralized deployment of servers, user access may need to be extended to multi-pole networks, the quality of service cannot be guaranteed, and the video-on-demand mode is the main mode, and the live mode is supplemented. Therefore, the structure is very It is complicated, and live broadcasting cannot be realized easily, and there is no networking method that is particularly suitable for live broadcasting.

Contents of the invention

The first object of the present invention is to provide a digital subscriber line access multiplexer to monitor the streaming media data, aiming at the above-mentioned deficiencies in the prior art.

The second purpose of the present invention is to provide a streaming media transmission system and transmission method for the deficiencies of the existing streaming media transmission system and transmission method, and realize live broadcasting through a simple system structure.

In order to achieve the above-mentioned first purpose, the present invention provides a digital subscriber line access multiplexer, including a main control module, which also includes:

The interface module is connected with the main control module, and is used for interacting with the upper layer equipment and the streaming media receiving terminal through the backbone network and the access network, and setting the channel of the digital subscriber line access multiplexer;

The streaming media server is connected with the main control module and the interface module, and is used to receive external media streams, and perform forwarding, storage, time shifting, shaping, and unicast/multicast conversion processing according to settings to obtain processed media streams information.

The streaming media server of the above technical solution includes: a device management interface module, connected to the main control module; a live forwarding module, connected to the interface module and the device management interface module, for receiving external media streams, and according to the set Customized forwarding, storage, time shifting, shaping, and unicast/multicast conversion processing; the media stream service module is connected with the live forwarding module, the device management interface module and the interface module, and is used to obtain media streams through the live forwarding module; The user connection management module is connected with the live forwarding module and the device management interface module, and is used for receiving commands from terminal devices.

And the live forwarding module can include: a media data interface submodule, connected with the interface module and the device management interface module, for requesting media streams from an external streaming media server according to configuration, and receiving streaming media data; module, connected with the media data interface sub-module, the device management interface module and the user connection management module, and used to transmit the media data to the corresponding user group according to the user data sent by the user connection management module, and send the media data to the corresponding user group The user connection management module sends information.

In addition, the media data interface sub-module and the data packet conversion sub-module are connected through the media cache sub-module, and are connected to the device management interface module, and are connected to a content storage interface module, and the content storage interface module is also connected to the There is a memory, and the media caching sub-module is used for temporarily storing and classifying the received original media stream data, and can store the media data in the memory as a specified time interval through the content storage interface module according to a given time interval Format. The media data interface sub-module is also connected with a monitoring terminal interface module, which is used to transmit the original media content to the monitoring equipment. The device management interface module, user connection management module and media stream service module are also connected to an on-demand service module for processing requests in the form of on-demand.

In order to achieve the above-mentioned second purpose, the present invention provides a streaming media data transmission system, comprising:

Several streaming media servers are used to provide streaming media data;

Several digital subscriber line access multiplexers are connected to the several streaming media servers through the backbone network for processing streaming media request information and processing streaming media data;

Several streaming media receiving terminals are connected to the digital subscriber line input multiplexer through the access network, and are used to send streaming media request information and receive the streaming media data processed by the digital subscriber line access multiplexer .

The DSL access multiplexer in the solution above is connected to the backbone network through a broadband access server. The streaming media receiving terminal is a PC or a TV set. The access network is an ADSL network.

In order to achieve the above-mentioned second purpose, the present invention also provides a streaming media data transmission method, comprising the following steps:

Step 1, the digital subscriber line access multiplexer receives the streaming media request information sent by the streaming media receiving terminal through the access network;

Step 2, the digital subscriber line access multiplexer sends the streaming media data sent by the streaming media server received through the backbone network or the streaming media data saved by itself to the streaming media receiving terminal, specifically for digital subscriber line access multiplexing The device management interface module of the streaming media server in the device sends the received streaming media request information to the user connection management module, and the user connection management module performs corresponding live broadcast request processing or on-demand processing according to the streaming media request information.

Step 1 in the above technical solution specifically includes: the interface module in the digital subscriber line access multiplexer receives the streaming media request information sent by the streaming media receiving terminal through the access network. The step 2 is specifically, step 20, the interface module sends the streaming media request information to the main control module in the digital subscriber line access multiplexer; step 21, the main control module accesses the multiplexer through the digital subscriber line The device management interface module in the device sends the streaming media request information to the user connection management module; Step 22, the user connection management module judges the streaming media request information, if it is a live broadcast request, then execute step 23; if it is an on-demand request, then execute Step 24; Step 23, the user connection management module judges the channel of the live broadcast request of the streaming media receiving terminal, and then sends the streaming media request information to the main control module through the device management interface module, and the main control module joins the streaming media receiving terminal The channel group controls the digital subscriber line to access the media stream service module of the multiplexer through the equipment management interface, and sends the stream media data of the channel received by the live forwarding module to the receiving terminal; step 24, the user connection management module will The on-demand request of the streaming media receiving terminal is sent to the on-demand service module of the digital subscriber line access multiplexer, and the on-demand service module parses the on-demand request information, and then through the content storage interface of the digital subscriber line The device invokes the streaming media data required by the receiving terminal, and sends the streaming media data to the streaming media receiving terminal through the media streaming service module.

And, the media stream service module of controlling the DSL access multiplexer through the device management interface in the step 23 sends to the receiving terminal the stream media data of the channel received by the live forwarding module, specifically: step 231 , the media data interface sub-module of the live forwarding module accesses the interface module of the multiplexer through the digital subscriber line, receives the streaming media data sent by the streaming media server through the backbone network, and then sends the streaming media data to the The packet conversion submodule of the live forwarding module; step 232, the packet conversion submodule processes the streaming media data according to the user data sent by the user connection management module; step 233, the streaming media data after processing is sent to the media Streaming service module, and then send to the streaming media receiving terminal. Wherein the streaming media data in the step 232 is processed and specifically includes: according to the configuration of the main control module, the streaming media data is divided by channels; the streaming media data packets belonging to each channel are converted to IP addresses, so that the streaming media data packets The multicast address and the channel information in the main control module are kept corresponding. Wherein said step 231 also includes, the media data interface sub-module of said live forwarding module sends the streaming media data received to the packet conversion sub-module through the media cache sub-module, and streams the data according to the control information of the device management interface module The media data is sent to the memory through the content storage interface for storage.

Therefore, the digital subscriber line access multiplexer of the present invention can monitor streaming media data. The streaming media transmission system and transmission method realize live broadcast through a simple structure.

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a schematic structural diagram of a digital subscriber line access multiplexer of the present invention.

FIG. 2 is a schematic structural diagram of the streaming media data transmission system of the present invention.

Fig. 3 is a flow chart of the streaming media data transmission method of the present invention.

FIG. 4 is a flow chart of live forwarding of the streaming media data transmission method of the present invention.

Detailed ways

In the present invention, an existing digital subscriber line access multiplexer (Digital Subscriber Line Access Multiplexer, DSLAM) is implanted into a streaming media server, so that the DSLAM can conveniently realize on-demand and live broadcasting, so the streaming media transmission system utilizing the DSLAM The structure is simple, and it is very suitable for live broadcast, and the data processing pressure of the streaming media server in the service center is reduced.

As shown in Figure 1, it is the structure schematic diagram of DSLAM of the present invention, comprises interconnected main control module 1, interface module 2 and streaming media server 3, and this streaming media server 3 comprises equipment management interface module 30, and described main control module 1 is connected; the live forwarding module 31 is connected with the interface module 2 and the device management interface module 30, and is used to receive external media streams, and perform forwarding, storage, time shifting, shaping, and single/multicast conversion according to settings Processing; Media stream service module 32, is connected with described live forwarding module 31, device management interface module 30 and interface module 2, is used to obtain media flow according to live forwarding module 31; User connection management module 33, with described live forwarding The module 31 is connected with the device management interface module 30, and is used for receiving commands from the terminal device.

Described live forwarding module 31 comprises media data interface sub-module 311, is connected with described interface module 2 and equipment management interface module 30, is used for requesting media flow according to configuration external streaming media server, and receives streaming media data; Packet conversion The sub-module 312 is connected with the media data interface sub-module 311, the device management interface module 30 and the user connection management module 33, and is used to transmit the media data to the corresponding user data according to the user data sent by the user connection management module 33. In the user group, and send information to the user connection management module 33.

Moreover, the media data interface submodule 311 and the data packet conversion submodule 312 are connected through the media cache submodule 313, and are connected with the device management interface module 30, and are connected with a content storage interface module 314, and the content storage The interface module 314 is also connected with a memory 315, and the media caching submodule 313 is used for temporarily saving and classifying the received original media stream data, and can store data in the memory through the content storage interface module 314 according to a given time interval. At 315, the media data is stored in a specified format.

The media data interface sub-module 311 is also connected with a monitoring terminal interface module 316, which is used to transmit the original media content to the monitoring equipment, and the device management interface module 30, the user connection management module 33 and the media stream service module 32 are also connected with The on-demand service module 34 is configured to process requests in the form of on-demand.

In this way, the processing and monitoring of the on-demand request and the live broadcast request of the streaming media receiving terminal are realized.

As shown in Figure 2, it is the structural representation of streaming media transmission system of the present invention, comprises, several streaming media servers 4, several DSLAM5, are connected with described several streaming media servers 4 by backbone network 6, are used for processing flow Media request information and processing streaming data; several streaming media receiving terminals 7 are connected with the DSLAM5 through an access network (usually an ADSL network) 8, and are used to send streaming media clear information and receive after processing by the DSLAM5 streaming media data, and broadband access server (BAS) 9 can be used to provide user authentication, and it can be applied in a network where DSLAM cannot perform this function. The streaming media receiving terminal 7 can be a PC or a TV set.

Utilize the streaming media transmission system of DSLAM of the present invention, the network equipment in the system needn't all support the multicast function, and can reduce the streaming media server of data center, the network structure is simple like this, so the pressure of the data processing of streaming media reduces a lot.

The streaming media transmission method of the present invention is that the digital subscriber line access multiplexer receives the streaming media request information sent by the streaming media receiving terminal through the access network; the digital subscriber line access multiplexer receives the streaming media server through the backbone network The streaming media data sent or the streaming media data saved by itself is sent to the streaming media receiving terminal; the streaming media receiving terminal receives the streaming media data and plays it. As shown in Figure 3, it is a flowchart of a specific method, and the detailed steps are as follows:

Step 101, the interface module in the digital subscriber line access multiplexer receives the streaming media request information sent by the streaming media receiving terminal through the access network;

Step 102, the interface module sends the streaming media request information to the main control module in the digital subscriber line access multiplexer;

Step 103, the main control module sends to the user connection management module through the digital subscriber line access device management interface module in the multiplexer;

Step 104, the user connection management module judges the streaming media request information, if it is a live broadcast request, execute step 110; if it is an on-demand request, execute step 120;

Step 110, the user connection management module judges the channel of the live broadcast request of the streaming media receiving terminal, and then sends it to the main control module through the device management interface module, and the main control module adds the streaming media receiving terminal to the channel group, and controls the streaming media receiving terminal through the device management interface. The digital subscriber line is connected to the media streaming service module of the multiplexer, and the streaming media data of the channel received by the live forwarding module is sent to the receiving terminal;

Step 120, the user connection management module sends the on-demand request of the streaming media receiving terminal to the on-demand service module of the digital subscriber line access multiplexer, and the on-demand service module parses the on-demand request information, and then multiplexes it through the digital subscriber line The content storage interface of the device, calls the streaming media data required by the receiving terminal from the storage device, and sends the streaming media data to the streaming media receiving terminal through the media streaming service module.

As shown in Figure 4, in step 110, wherein the media stream service module of the digital subscriber line access multiplexer is controlled through the device management interface, and the streaming media of the channel received by the live forwarding module is sent to the receiving terminal The data is specifically:

Step 201, the media data interface sub-module of the live forwarding module accesses the interface module of the multiplexer through the digital subscriber line, receives the streaming media data sent by the streaming media server through the backbone network, and then sends the streaming media data to The packet conversion sub-module of the live forwarding module;

Step 202, the packet conversion submodule processes the streaming media data according to the user data sent by the user connection management module;

These processes all include: according to the configuration of the main control module, the streaming media data is divided into channels; for the streaming media data packets belonging to each channel, IP address conversion is carried out, so that the multicast address of the streaming media data packets is the same as that in the main control module. The channel information remains corresponding; in addition, for some special user requests, the main control module will establish independent channels for them, and the data packet conversion sub-module performs corresponding IP address conversion for these independent channels, etc.;

Step 203, the processed streaming media data is sent to the media streaming service module, and then sent to the streaming media receiving terminal.

And it also includes in step 201 that the media data interface submodule of the live forwarding module sends the received streaming media data to the packet conversion submodule through the media cache submodule, and sends the received streaming media data according to the control information of the device management interface module The streaming media data is sent to the storage through the content storage interface for storage in a certain format.

Therefore, the streaming media data transmission method of the present invention is very simple and practical to realize the processing of the live broadcast request and the on-demand request of the receiving terminal.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention without limitation. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be The scheme shall be modified or equivalently replaced without departing from the spirit and scope of the technical scheme of the present invention.

Claims (16)

1. A digital subscriber line access multiplexer, comprising a main control module, characterized in that it also includes: The interface module is connected with the main control module, and is used for interacting with the upper-layer equipment and the streaming media receiving terminal through the backbone network and the access network, and setting the channel for accessing the digital subscriber line to the multiplexer; The streaming media server is connected with the main control module and the interface module, and is used to receive external media streams, and perform forwarding, storage, time shifting, shaping, and unicast/multicast conversion processing according to settings to obtain processed media streams information. 2. The digital subscriber line access multiplexer according to claim 1, characterized in that the streaming media server includes: a device management interface module connected to the main control module; The live forwarding module is connected with the interface module and the device management interface module, and is used to receive external media streams, and perform forwarding, storage, time shifting, shaping, and unicast/multicast conversion processing according to settings; The media stream service module is connected with the live forwarding module, the device management interface module and the interface module, and is used to obtain the media stream through the live forwarding module; The user connection management module is connected with the live forwarding module and the device management interface module, and is used for receiving commands from terminal devices. 3. The digital subscriber line access multiplexer according to claim 2, characterized in that the live forwarding module includes: The media data interface sub-module is connected with the interface module and the device management interface module, and is used to request a media stream according to configuration of an external streaming media server and receive streaming media data; The data packet conversion sub-module is connected with the media data interface sub-module, the device management interface module and the user connection management module, and is used to transmit the media data to the corresponding user group according to the user data sent by the user connection management module and send information to the user connection management module. 4. The digital subscriber line access multiplexer according to claim 3, characterized in that the media data interface submodule and the data packet conversion submodule are connected through a media cache submodule, and are connected with the device management interface module connected, and connected with a content storage interface module, the content storage interface module is also connected with a memory, and the media cache sub-module is used for temporarily storing and classifying the received original media stream data, and can according to the given Store the media data in a specified format on the memory through the content storage interface module at a fixed time interval. 5. The digital subscriber line access multiplexer according to claim 3, characterized in that said media data interface sub-module is also connected with a monitoring terminal interface module for transmitting original media content to monitoring equipment. 6. The digital subscriber line access multiplexer according to claim 2, 3 or 4, characterized in that the device management interface module, user connection management module and media streaming service module are also connected to an on-demand service module for Handles requests for on-demand forms. 7. A streaming media data transmission system using the digital subscriber line access multiplexer according to any one of the preceding claims, characterized in that it comprises: Several streaming media servers are used to provide streaming media data; Several of the digital subscriber line access multiplexers are connected to the several streaming media servers through the backbone network for processing streaming media request information and processing streaming media data; Several streaming media receiving terminals are connected to the digital subscriber line input multiplexer through the access network, and are used to send streaming media request information and receive the streaming media data processed by the digital subscriber line access multiplexer . 8. The streaming media data transmission system according to claim 7, characterized in that the digital subscriber line access multiplexer is connected to the backbone network through a broadband access server. 9. The streaming media data transmission system according to claim 7 or 8, characterized in that the streaming media receiving terminal is a PC or a TV. 10. The streaming media data transmission system according to claim 7 or 8, characterized in that said access network is an ADSL network. 11. A streaming media data transmission method, comprising the steps of: Step 1, the digital subscriber line access multiplexer receives the streaming media request information sent by the streaming media receiving terminal through the access network; Step 2, the digital subscriber line access multiplexer sends the streaming media data sent by the streaming media server received through the backbone network or the streaming media data saved by itself to the streaming media receiving terminal, specifically for digital subscriber line access multiplexing The device management interface module of the streaming media server in the device sends the received streaming media request information to the user connection management module, and the user connection management module performs corresponding live broadcast request processing or on-demand processing according to the streaming media request information. 12. The streaming media data transmission method according to claim 11, wherein said step 1 is specifically: the interface module in the digital subscriber line access multiplexer receives the streaming media request sent by the streaming media receiving terminal through the access network information. 13. The streaming media data transmission method according to claim 12, wherein said step 2 is specifically, Step 20, the interface module sends the streaming media request information to the main control module in the DSL access multiplexer; Step 21, the main control module sends the streaming media request information to the user connection management module through the digital subscriber line access device management interface module in the multiplexer; Step 22, the user connection management module judges the streaming media request information, if it is a live broadcast request, then perform step 23; if it is an on-demand request, then perform step 24; Step 23, the user connection management module judges the channel of the live broadcast request of the streaming media receiving terminal, and then sends the streaming media request information to the main control module through the device management interface module, and the main control module adds the streaming media receiving terminal to the channel group , controlling the digital subscriber line to access the media stream service module of the multiplexer through the device management interface, and sending the streaming media data of the channel received by the live forwarding module to the receiving terminal; Step 24, the user connection management module sends the on-demand request of the streaming media receiving terminal to the on-demand service module of the digital subscriber line access multiplexer, and the on-demand service module parses the on-demand request information, and then multiplexes through the digital subscriber line The content storage interface of the device, calls the streaming media data required by the receiving terminal from the storage device, and sends the streaming media data to the streaming media receiving terminal through the media streaming service module. 14. The streaming media data transmission method according to claim 13, wherein in said step 23, the media stream service module of the digital subscriber line access multiplexer is controlled through the device management interface, and the forwarding through the live broadcast is sent to the receiving terminal. The streaming media data of the channel received by the module is as follows: Step 231, the media data interface sub-module of the live forwarding module accesses the interface module of the multiplexer through the digital subscriber line, receives the streaming media data sent by the streaming media server through the backbone network, and then sends the streaming media data to The packet conversion sub-module of the live forwarding module; Step 232, the data packet conversion submodule processes the streaming media data according to the user data sent by the user connection management module; Step 233, the processed streaming media data is sent to the media streaming service module, and then sent to the streaming media receiving terminal. 15. The streaming media data transmission method according to claim 14, wherein the processing of the streaming media data in the step 232 specifically comprises: dividing the streaming media data by channels according to the configuration of the main control module; The streaming media data packet performs IP address conversion, so that the multicast address of the streaming media data packet is kept corresponding to the channel information in the main control module. 16. The streaming media data transmission method according to claim 14 or 15, wherein said step 231 further comprises that the media data interface sub-module of the live forwarding module sends the received streaming media data to the The data packet conversion sub-module sends the streaming media data to the memory through the content storage interface for storage according to the control information of the device management interface module.

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