CN101282263B - Broadband access equipment and uses thereof - Google Patents
Broadband access equipment and uses thereof Download PDFInfo
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- CN101282263B CN101282263B CN2007101807906A CN200710180790A CN101282263B CN 101282263 B CN101282263 B CN 101282263B CN 2007101807906 A CN2007101807906 A CN 2007101807906A CN 200710180790 A CN200710180790 A CN 200710180790A CN 101282263 B CN101282263 B CN 101282263B
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Abstract
The invention provides a digital subscriber line access multiplexer and application thereof. The core of the digital subscriber line access multiplexer comprises: arranging a video service unit in the digital subscriber line access multiplexer, and the inner-arranged video service unit transmitting the stored video service to a subscriber terminal through the digital subscriber line access multiplexer where the video service unit is according to the request of the subscriber terminal. The invention reduces the bandwidth requirement of the video service to the access network and convergence network, and solves efficiently the bottleneck problem of bandwidth of a backbone network and the convergence network; the invention does not have influence on design principles that the current bandwidth access network and the convergence network do not realize exchange for video services, simplifies resource management mechanism for entire access network and the convergence network and complexity for managing the resources of the access network, thereby enhancing utilization rate of the network bandwidth, reducing complexity for managing the network resources and eliminating bottleneck of the video server.
Description
Technical field
The present invention relates to the network communications technology field, be specifically related to a kind of broadband access equipment and application thereof.
Background technology
Along with various broadband access technologys as based on the DSL (Digital Subscriber Loop) of twisted-pair feeder, popularizing based on technology such as optical fiber and wireless access, operator is desirably in and carries out more business in the network, and wherein Video (video) is professional is an emphasis as video broadcasting, VoD (video request program) etc.
Professional main multicast and the two kinds of basic transmission patterns of clean culture of relying on of Video, the application of some complexity also needs clean culture and multicast mixed and alternate to realize.Bearer network need provide reliable video flowing distribution and corresponding QoS to guarantee according to the video traffic demand.
At present the network architecture that provides video traffic based on broadband access network as shown in Figure 1.
Among Fig. 1, NT (Network Terminal, the network terminal) is the terminal with end user's access network, as DSL Modem etc.CPE (subscriber terminal equipment) is the terminal that the end user is professional and use, as STB (set-top box) etc.CPE and NT are notions in logic, belong to the user or the subscriber household network equipment, can be mapped in practice on the terminal, provide network insertion and Video Applications simultaneously as 3G mobile; Also can be the equipment that separates, as RG (home gateway, Residential Gateway) and STB (set-top box) etc.Access Node (access node) provides the equipment that broadband access is converged, as the CMTS (cable is adjusted the demodulator ending system) in inserting based on the DSLAM in the DSL access network (digital subscriber line access multiplex), based on BS (base station), Cable in the Radio Access Networks such as WiMax, Wi-Fi, UMTS.Service Gateway (gateway) provides the equipment of networking and application controls, as BRAS, and ER (edge router, Edge Router), GGSN/SGSN (GGSN/GPRS serving GPRS support node) etc.Edge video server (edge video server) is a video server, can show as a main frame in the network.Video server provides video traffic for video terminal, has only legal users just can visit in principle, and therefore, the general network level of placing of video server is on BRAS.Like this, have only by realizing after the BRAS authentication, guaranteed the safety of Video service parts for the visit of video server.
At present, the method for realization Video business is:
For the Video business of multicast type, multicast video streams is distributed to end user through core net along tree topology from Video Headend (video headend shall).For the clean culture video traffic, video flowing is pushed directly to the end user from video server.For some special business demand, need clean culture and multicast alternately to realize, such as time-moving television (Time Shift TV) etc.
Multicasting technology has well been alleviated the consumption of video traffic to the network bandwidth.The foundation of multicast tree is generally based on multicast routing protocol IGMP/PIM/DVMRP (IGMP/independent multicast agreement/distance vector multicast routing protocol) etc.
Following two comparison distinct issues are arranged in above-mentioned realization Video business procedure:
Problem one, along with the increase of video user and video traffic problem to network bandwidth consumption.
The problem that the error rate of problem two, access technology such as DSL access technology, WiMAX access technology etc. causes video quality to descend.
At problem one, in order to solve problems such as the consumption of video traffic to the network bandwidth, video server bottleneck, general solution is at present: adopt level distributed video server, provide Video service by the distributed video server partition.For safety and the manageable purpose of Internet resources, the access network of present broad band bearing under service provision point such as BRAS/ER is user and professional the isolation, therefore, distributed video server can only be placed on service provision point such as the BRAS/ER etc.
At problem two, existing solution is mainly: rely on the retransmission mechanism of application layer, promptly be directed to unicast video stream, when portable terminal detected message dropping, Xiang Yuanduan sent application and requires to retransmit, but does not have retransmission mechanism for multicast service.
Distributed video server is placed on the service provision point, though can guarantee to have only terminal ability accessing video server by network authentication, make the network bandwidth between Access Network and the service provision point controlled fully, but, service provision point is when managing the Internet resources between itself and the Access Network, the video flowing that needs dynamic perception video server, make the network resource management complexity at service provision point place, and, along with broadband access network user's the increase and the quick expansion of video traffic demand, the bandwidth bottleneck between service provision point and the Access Network is outstanding all the more.
For group business stream, because multicast itself does not define retransmission mechanism, can not retransmit at certain multicast node, make video quality impaired, and, because the losing of message mainly occurs in the access medium section, video server is deployed in convergence-level or more high-rise, the message of the re-transmission of unicast video stream need consume access network to convergence-level in addition more high-rise between the network bandwidth.
Summary of the invention
The objective of the invention is to, a kind of broadband access equipment and application thereof are provided,,, reduce the network resource management complexity, eliminate the purpose of video server bottleneck to realize improving network bandwidth utilance by the Video service unit is built in the broadband access equipment.
For achieving the above object, a kind of digital subscriber line access multiplex provided by the invention, it is characterized in that, be built-in with the Video service unit in the described digital subscriber line access multiplex, described built-in Video service unit transfers to user terminal according to the request of user terminal with the video traffic of its storage digital subscriber line access multiplex by its place, in the access control module of Video service unit, store the access right limit information, when user terminal access Video service unit, Video service unit access control module is determined the switch-in attribute information of user terminal, and the access authority of definite this user terminal access Video service unit, carry out the access control of Video service unit then according to the access authority of this user terminal correspondence.
A kind of network system that video traffic is provided based on broadband access equipment, it is characterized in that, comprise: user terminal and the broadband access equipment that is built-in with the Video service unit, in the access control module of Video service unit, store the access right limit information, when user terminal access Video service unit, Video service unit access control module is determined the switch-in attribute information of user terminal, and the access authority of definite this user terminal access Video service unit, carry out the access control of Video service unit then according to the access authority of this user terminal correspondence.
A kind of video traffic implementation method is characterized in that, comprising:
A, in broadband access equipment built-in Video service unit;
B, described Video service unit are according to the request of user terminal, and the access right limit information arranged according to what in the access control module of Video service unit, store, when user terminal access Video service unit, Video service unit access control module is determined the switch-in attribute information of user terminal, and determine the access authority of this user terminal access Video service unit, the video traffic of its storage broadband access equipment by its place is transferred to user terminal.
Description by technique scheme as can be known, the present invention is by being built in broadband access equipment inside with the Video service unit, make the Video service unit directly provide the clean culture video traffic to user terminal, alleviated the bandwidth demand of video traffic to access network and aggregation networks, make backbone network that some novel video traffics bring with converge the wide bottleneck problem of guipure and obtained effective solution; Be built in the realization unicast service that Video service unit in the broadband access equipment can be convenient and the switching of multicast service, accelerated the speed that channel switches, thereby brought better customer experience; Because the Video service unit is built in the access device, the Video service unit can be considered as the broadband access equipment own resources, to existing broadband access network and aggregation networks aspect user and the not influence of professional design principle of isolating, simultaneously, simplify the resource management mechanism of whole access network and aggregation networks; Be built in Video service unit in the broadband access equipment and the network of relation bandwidth resources between other network equipments and become the device interior resource, reduce video traffic bandwidth demand to access layer network and convergence-level network is provided a little, and need not the management control of network level, simplified the complexity of access network resource management; The re-transmission flow of unicast video stream message of the present invention does not take the convergence-level network bandwidth, and the re-transmission that the multicast video flowing is lost message has effectively been supported in the Video service unit, the video quality of user terminal is effectively improved, and the re-transmission of multicast video flowing message does not take the consumption of the access layer network and the convergence-level network bandwidth equally.Broadband access equipment of the present invention can be realized the access control of user terminal to the Video service unit, do not influencing existing network under the situation of the design principle that the Access Layer business does not exchange, guarantee the safety of access network, simplified the rights management of access network access control; Thereby realized raising network bandwidth utilance by technical scheme provided by the invention, reduced the network resource management complexity, eliminated the purpose of video server bottleneck.
Description of drawings
Fig. 1 be prior art provide the network architecture schematic diagram of video traffic based on broadband access network;
Fig. 2 is the network architecture schematic diagram that video traffic is provided based on broadband access network of the present invention;
Fig. 3 is the flow chart that realization multicast video message of the present invention retransmits.
Embodiment
Video server is placed on the service provision point, can make the network resource management complexity at service provision point place, and, can make the bandwidth bottleneck phenomenon between service provision point and the Access Network, the video server bottleneck is outstanding all the more, if in order to address the above problem, only simply video server is placed into Access Layer, so, will certainly require the access under the service provision point and the exchange capacity of convergence-level network support video traffic, network security is brought hidden danger, and, if video server is deployed in converging on the net between broadband access node and the service provision point, the Business Stream logical topology will not be simple tree in the Access Network so, thereby, cause the complexity of access layer network resource management.
For addressing the above problem, the invention provides a kind of broadband access equipment, the network system and the video traffic implementation method of video traffic are provided based on broadband access equipment, by the Video service unit is built in the broadband access equipment, provide video traffic by the broadband access equipment of built-in Video service unit and the network at place thereof for user terminal, efficiently solve the problems referred to above.
Below in conjunction with accompanying drawing technical scheme provided by the invention is further described.
The present invention be built-in with the Video service unit broadband access equipment can for: DSLAM etc., the Video service unit that is built in the broadband access equipment mainly comprises: clean culture memory module, clean culture forwarding module, unicast retransmission module, multicast memory module and multicast retransmission module.For guaranteeing the safety of access network, simplify the rights management of access network access control, also be provided with Video service unit access control module in the broadband access equipment of the present invention.
Video service unit access control module is mainly used in the access control of user terminal being carried out the Video service unit according to the access right limit information.The access right limit information can be stored in the Video service unit access control module, when user terminal access Video service unit, Video service unit access control module is determined the switch-in attribute information of user terminal, as PVC, port etc., and the access authority of definite this user terminal access Video service unit, and carry out the access control of Video service unit according to the access authority of this user terminal correspondence.
The clean culture memory module is mainly used in storage clean culture video traffic, the clean culture video traffic of clean culture memory module storage can obtain from video source, as the unicast video stream that the clean culture memory module receives and storage networking side such as video source are come by the gateway transmission.
The clean culture forwarding module is mainly used in the clean culture video traffic request according to user terminal, and with the corresponding clean culture video traffic of storing in the clean culture memory module, the broadband access equipment by its place transfers to corresponding user terminal.This user terminal should be the user terminal that allows the accessing video service unit.
The unicast retransmission module is mainly used in after the retransmission of lost clean culture video message request that receives user terminal, according to the unicast data message of storing in the information of user terminal unicast video stream message dropping, the clean culture memory module, the broadband access equipment by its place is the clean culture video message of this user terminal retransmission of lost.
The multicast memory module is mainly used in and obtains multicast video flowing and the storage that the network side transmission comes in real time.
The multicast retransmission module is mainly used in after the retransmission of lost multicast video message request that receives user terminal, multicast video message according to the correspondence of storing in the information of losing, the multicast memory module, with the broadband access equipment of mode of unicast, be the multicast video message of this user terminal retransmission of lost by its place.This user terminal should be the user terminal that allows the accessing video service unit.
Multicast video flowing among the present invention comprises: broadcast video stream and multicast video streams.
The network system that provides video traffic based on broadband access equipment of the present invention as shown in Figure 2.
Network system among Fig. 2 mainly comprises: video source, gateway and be built-in with the broadband access equipment of Video service unit.Video source transfers to gateway with unicast video stream, multicast video flowing, gateway transfers to the broadband access equipment that is built-in with the Video service unit with unicast video stream, multicast video flowing, this unicast video stream is stored in Video service unit built-in in the broadband access equipment, and, the corresponding clean culture video message of its storage is transferred to corresponding user terminal by broadband access equipment according to the clean culture video message request of user terminal.When broadband access equipment transferred to user terminal with multicast video streams, built-in Video service unit obtained and stores the multicast video flowing; The Video service unit is after the retransmission of lost multicast video message request that receives user terminal, multicast video message according to the correspondence of storing in the information of losing, the Video service unit, with the broadband access equipment of mode of unicast, be the multicast video message of this user terminal retransmission of lost by its place.
Is that example provides the network system of video traffic and video traffic implementation method to be elaborated to of the present invention based on broadband access equipment below in conjunction with accompanying drawing 3 with the professional implementation method that retransmits of group broadcasting video frequency.
Among Fig. 3, directly be sent to user terminal from video source, gateway, broadband access equipment in step 1-1, multicast video streams, the multicast access rights control of user terminal is by other mechanism realizations, not within the scope of the present invention.
To step 1-2, the real-time buffer memory in Video service unit (Cache) flux of multicast, the capacity of buffer memory is the maximum transmitted time delay that video traffic allows.
To step 2, transfer in the process of user terminal because the multicast video flowing message that the circuit transmission error code causes user terminal to receive is lost in multicast video streams.
Detect the group broadcasting video frequency stream packet to step 3, user terminal and lose phenomenon, send the request of retransmission of lost multicast video message to the Video service unit.
After receiving the request of retransmission of lost multicast video message to step 4, Video service unit, at first judge the legitimacy of this user terminal based on the access right limit information that sends the requesting users terminal, after judging by legitimacy, the group broadcasting video frequency message of losing of user's request retransmission is sent to user terminal by mode of unicast
The present invention is by being built in broadband access equipment inside with the Video service unit, make the Video service unit that video traffics such as clean culture can directly be provided to user terminal, alleviated the bandwidth demand of video traffic to access network and aggregation networks, make backbone network that some novel video traffics such as PVR (Personal Video Record personal video recorder), Time Shift TV (time-moving television), many pictures etc. bring with converge the wide bottleneck problem of guipure and obtained effective solution; Be built in the realization unicast service that Video service unit in the broadband access equipment can be convenient and the switching of multicast service, accelerated the speed that channel switches, thereby brought better customer experience; Because the Video service unit is built in the access device, the Video service unit can be considered as the broadband access equipment own resources, existing broadband access network and aggregation networks are not realized that the design principle of video traffic exchange does not influence, simultaneously, simplify the resource management mechanism of whole access network and aggregation networks; Be built in Video service unit in the broadband access equipment and the network of relation bandwidth resources between other network equipments and become the device interior resource, reduce video traffic bandwidth demand to access layer network and convergence-level network is provided a little, and need not the management control of network level, simplified the complexity of access network resource management; Because the re-transmission flow of unicast video stream message does not take the convergence-level network bandwidth, has improved network bandwidth utilance; Because the re-transmission that the multicast video flowing is lost message has effectively been supported in the built-in Video service unit of access device, the video quality of user terminal is effectively improved, and the re-transmission of multicast video flowing message does not take the consumption of the access layer network and the convergence-level network bandwidth equally.The present invention need not characteristics such as BRAS are transplanted in the access device, access device can simply insert according to user terminal and connect as PVC, the authority information of attribute correspondences such as port, realize the access control of user terminal to the Video service unit, like this, not influencing existing network under the situation of the professional design principle of isolating of Access Layer, guaranteed the safety of access network, simplified the rights management of access network access control.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, and the claim of application documents of the present invention comprises these distortion and variation.
Claims (11)
1. digital subscriber line access multiplex, it is characterized in that, be built-in with the Video service unit in the described digital subscriber line access multiplex, described built-in Video service unit transfers to user terminal according to the request of user terminal with the video traffic of its storage digital subscriber line access multiplex by its place, in the access control module of Video service unit, store the access right limit information, when user terminal access Video service unit, the access control module of Video service unit is determined the switch-in attribute information of user terminal, and the access authority of definite this user terminal access Video service unit, carry out the access control of Video service unit then according to the access authority of this user terminal correspondence.
2. digital subscriber line access multiplex as claimed in claim 1 is characterized in that, described Video service unit comprises: clean culture memory module and clean culture forwarding module;
Clean culture memory module: store the clean culture video traffic;
Clean culture forwarding module: the corresponding clean culture video traffic stored in the clean culture memory module digital subscriber line access multiplex by its place is transferred to user terminal according to the clean culture video traffic request of user terminal.
3. digital subscriber line access multiplex as claimed in claim 2 is characterized in that, described Video service also is provided with in the unit: the unicast retransmission module;
Unicast retransmission module: after the retransmission of lost clean culture video message request that receives user terminal, the corresponding clean culture video message stored in the clean culture memory module digital subscriber line access multiplex by its place is transferred to user terminal according to described information of losing.
4. digital subscriber line access multiplex as claimed in claim 1 is characterized in that, described Video service is provided with in the unit: multicast memory module and multicast retransmission module;
Multicast memory module: obtain multicast video flowing and storage that the network side transmission comes in real time;
Multicast retransmission module: after the retransmission of lost multicast video message request that receives user terminal, the corresponding multicast video message stored in the multicast memory module is transferred to user terminal with the digital subscriber line access multiplex of mode of unicast by its place according to described information of losing.
5. as the described digital subscriber line access multiplex of the arbitrary claim of claim 1 to 4, it is characterized in that described switch-in attribute information is specially: PVC or port information.
6. network system that video traffic is provided based on broadband access equipment, it is characterized in that, comprise: user terminal and the broadband access equipment that is built-in with the Video service unit, in the access control module of Video service unit, store the access right limit information, when user terminal access Video service unit, Video service unit access control module is determined the switch-in attribute information of user terminal, and the access authority of definite this user terminal access Video service unit, carry out the access control of Video service unit then according to the access authority of this user terminal correspondence.
7. system as claimed in claim 5 is characterized in that, described switch-in attribute information is specially: PVC or port information.
8. a video traffic implementation method is characterized in that, comprising:
A, in broadband access equipment built-in Video service unit;
B, described Video service unit are according to the request of user terminal, and the access right limit information arranged according to what in the access control module of Video service unit, store, when user terminal access Video service unit, Video service unit access control module is determined the switch-in attribute information of user terminal, and determine the access authority of this user terminal access Video service unit, the video traffic of its storage broadband access equipment by its place is transferred to user terminal.
9. a kind of video traffic implementation method as claimed in claim 8 is characterized in that described broadband access equipment comprises: Digital Subscriber Line Access Multiplexer.
10. a kind of video traffic implementation method as claimed in claim 8 is characterized in that the video traffic among the described step b comprises: clean culture video traffic and/or multicast video traffic;
And described step b specifically comprises:
Described Video service unit transfers to user terminal according to the clean culture video traffic request of user terminal with the clean culture video traffic of the correspondence of its storage broadband access equipment by its place; And/or
Described Video service unit obtains multicast video flowing and the storage that the network side transmission comes in real time;
Described Video service unit transfers to user terminal with the multicast video message of the correspondence of its storage with the broadband access equipment of mode of unicast by its place according to described information of losing when the retransmission of lost multicast video message request that receives user terminal.
11. a kind of video traffic implementation method as claimed in claim 8 is characterized in that described step b also comprises:
The Video service unit transfers to user terminal according to described information of losing with the clean culture video message of the correspondence of its storage broadband access equipment by its place when the retransmission of lost multicast video message request that receives user terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101807906A CN101282263B (en) | 2005-07-29 | 2005-07-29 | Broadband access equipment and uses thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007101807906A CN101282263B (en) | 2005-07-29 | 2005-07-29 | Broadband access equipment and uses thereof |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100886367A Division CN100525192C (en) | 2005-07-29 | 2005-07-29 | Broadband access device, system and method |
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| Publication Number | Publication Date |
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| CN101282263A CN101282263A (en) | 2008-10-08 |
| CN101282263B true CN101282263B (en) | 2011-07-20 |
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| CN2007101807906A Expired - Fee Related CN101282263B (en) | 2005-07-29 | 2005-07-29 | Broadband access equipment and uses thereof |
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| WO2019095382A1 (en) * | 2017-11-20 | 2019-05-23 | 深圳市大疆创新科技有限公司 | Image transmission method and apparatus for unmanned aerial vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1368811A (en) * | 2001-02-06 | 2002-09-11 | 北京华诺信息技术有限公司 | Device and method for sharing information communication and storage space in broadband network system |
| CN1617524A (en) * | 2003-11-11 | 2005-05-18 | 华为技术有限公司 | Terminal cut-in device in broadband network and its method for cut-in network |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1368811A (en) * | 2001-02-06 | 2002-09-11 | 北京华诺信息技术有限公司 | Device and method for sharing information communication and storage space in broadband network system |
| CN1617524A (en) * | 2003-11-11 | 2005-05-18 | 华为技术有限公司 | Terminal cut-in device in broadband network and its method for cut-in network |
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| CN101282263A (en) | 2008-10-08 |
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