CN1725692A - Method and system for providing LAN access user with network TV service - Google Patents
Method and system for providing LAN access user with network TV service Download PDFInfo
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Abstract
A system providing LAN access user with network TV service which includes wideband insertion server, multicast exchanging device, set - top box and playing device. The wideband insertion server is down - sending channel right and video data of multicast to multicast exchanging device, the set - top box for sending channel request message to said exchanging device and for sending video data to playing device , multicast exchanging device for copying video data of the channel and for sending it to set - top box after verifying that set - top box has access right of destination channel in multicast channel request message . The service method is also disclosed.
Description
Technical field
The present invention relates to network TV business, relate in particular to the network television system of serving LAN access user.
Background technology
The scale of broadband metropolitan area network has had sizable development at present, has also possessed a considerable amount of access users simultaneously.For operator, how to improve the per capita consuming level that inserts the user, improving profitability is the current problem that needs solution, generally use the user under the situation of single business of networking, press for and find new business growth point, provide by abundant content to attract the user, bandwidth is used fully.In this case, IPTV (Internet Protocol Television, IPTV) becomes the generally good business development direction of each big operator.
IPTV is a kind of broadband cable network that utilizes, and integrates multiple technologies such as the Internet, multimedia, communication, and the brand-new technology of the multiple interactive services that comprises Digital Television is provided to the user.The user can enjoy the IPTV service by the mode of computer or " set-top box+television set ".The class of business that IPTV can provide is a lot, mainly comprises TV class business, communication class business and various value-added services.Specifically, the service of TV class is meant the service relevant with television services, as radio and television, video on demand, personal video recording etc.; The communication class service mainly refers to IP-based speech business, instant messaging service, television short message etc.; Value-added service then is meant TV shopping, interactive advertisement, game on line etc.
In the broadband IP metropolitan area network, realize above-mentioned business, require to support clean culture and multicast simultaneously in the networking of broadband network.Because clean culture is the most basic transmission means of IP network, and relate to the application such as the existing mature technique scheme in IP network such as video request program, game on line of clean culture, be to solve the multicast problem of broadband network so realize the key of IPTV business.
Present broadband access method mainly adopts ADSL (Asymmetrical Digital SubscriberLoop, the ADSL (Asymmetric Digital Subscriber Line) loop) access and LAN (Local Area Network, local area network (LAN)) inserts two kinds, wherein LAN inserts and is mainly used in short distance, as a plurality of access user situations are arranged in the building.
In the prior art, serve IPTV system configuration that LAN inserts the user as shown in Figure 1.User's playing device 50 is connected with set-top box 40 as television set, and set-top box 40 is connected to access switch 120, and access switch 120 is connected to BAS Broadband Access Server 10 by convergence switch 130, and BAS Broadband Access Server 10 is connected with the broadband backbone network.
Wherein, BAS Broadband Access Server 10 removes and carries out user's access, finish network access authentication, address assignment, user and insert control of authority, QoS (Quality of Service, service quality) outside the function such as Bandwidth Management, still hang all users' gateway device down, each user's VLAN (Virtual Local AreaNetwork, VLAN) information terminates on this BAS Broadband Access Server 10.
Access switch 120 and convergence switch 130 are Layer 2 switch, and convergence switch 130 only runs up to show effect between BAS Broadband Access Server 10 and access switch 120 and uses.Since the set-top box quantity that BAS Broadband Access Server 10 is supported usually 1,000 or more until tens thousand of, its port number is not enough to connect the required access switch of these set-top box of access, so introduced convergence switch 130 in networking.This network model is the prevailing model that current broadband metropolitan area network is built, and is widely used at numerous operator places.
When the multicast service of above-mentioned network model operation IPTV, because BRAS (Broadband RemoteAccess Server, BAS Broadband Access Server) the set-top box quantity of Zhi Chiing is considerably beyond its replication capacity to the group broadcasting video frequency data, and the downlink bandwidth of BRAS also can't meet the demands, and therefore must hang at BRAS following the management of multicast and carry out in being equipped with.
In the prior art, the management of multicast is carried out in access switch.Move MVR (Multicast VLAN Registration on the access switch, multicast virtual local area network registration) agreement, the multicast message of set-top box all is placed among the special VLAN and handles on all these access switch, like this, being replicated on the access switch of group broadcasting video frequency data carried out.For BRAS, have only a VLAN carrying out multicast on demand on this access switch, can save BRAS preferably to the network bandwidth between the L2 equipment.Correspondingly, the multicast channel control of authority of set-top box is also finished by access switch simultaneously.
Detailed process is as follows: BRAS is handed down to access switch by network management protocol with the multicast channel authority; STB (Set Top Box, set-top box) sends IGMP (Internet GroupManagement Protocol, multicast management protocol) Join/Leave (adding/leave) message to access switch and carries out the channel switching; After access switch is received IGMP Join/Leave message, if this set-top box can be visited the purpose channel in the message in the multicast channel authority, then this set-top box is joined among the corresponding VLAN, duplicate the group broadcasting video frequency transfer of data of this purpose channel and give this set-top box, play by playing device.
For unicast message, convergence switch and access switch only run up to show effect between set-top box and BAS Broadband Access Server and use.
As seen, such scheme has proposed very high requirement to access switch: access switch must be supported the MVR agreement; Access switch must be supported multicast IGMP snooping (multicast listener), to distinguish IGMP Join/Leave message; Access switch must be supported the control to the multicast channel authority.
In fact, the access server of the LAN of operator access network part is more outmoded at present, most VLAN that only support the 802.1Q standard, but do not have above-mentioned every and multicast function associated.In other words, adopt existing scheme to realize the IPTV business, must change the enormous amount access switch, cost is high.Simultaneously, because the set-top box number that access switch is hung down is limited, the distribution control of its multicast channel authority disperses very much, and the access switch that uses of operator comprises the different product of different manufacturers, is difficult to multicast is carried out effective unified management.
Summary of the invention
The technical problem to be solved in the present invention is that prior art multicast functionality to access switch when realizing that IPTV is professional requires too high.
Of the present inventionly, LAN access user comprises BAS Broadband Access Server, multicast switching equipment, set-top box and playing device for providing the system of Web TV service, wherein:
Described BAS Broadband Access Server comprises the multicast access module, is used for issuing the multicast channel authority and according to the request of described multicast switching equipment, issuing at least one cover group broadcasting video frequency data to described multicast switching equipment;
Described set-top box comprises the multicast module, is used for sending the multicast channel request message to described multicast switching equipment, and the group broadcasting video frequency data that described multicast switching equipment transmits are sent to described playing device broadcast;
Described multicast switching equipment comprises control of authority module and request of data replication module, after the described set-top box of multicast channel Authority Verification that wherein control of authority module issues according to described BAS Broadband Access Server has the access rights of purpose channel in the described multicast channel request message, send instruction to the request of data replication module; The request of data replication module is received instruction, asks the group broadcasting video frequency data of the described purpose channel that described BAS Broadband Access Server sends, and transfers to described set-top box after it is duplicated.
Preferably, described system also comprises the access switching equipment, is connected between described multicast switching equipment and the described set-top box; Described access device comprises the transparent transmission module, is used for E-Packeting and data.
Preferably, described multicast switching equipment also comprises the VLAN module, be connected between request of data replication module and the described access switching equipment, being used for that described set-top box is carried out VLAN divides, control data request replication module carries out duplicating of group broadcasting video frequency data between described VLAN, control group broadcasting video frequency data are transmitted in described VLAN;
Described access switching equipment also comprises the VLAN control module, is connected between described multicast switching equipment and the described transparent transmission module, is used for controlling described transparent transmission module and transmits data and message in described VLAN.
Preferably, described multicast switching equipment also comprises the address memory module, and the multicast path of each VLAN that is used for storing setting is by interface IP address; And described multicast path offered described VLAN module to control duplicating and transmitting of described group broadcasting video frequency data by interface IP address.
Preferably, described multicast switching equipment also comprises the service quality module, be connected between request of data replication module and the VLAN module, be used for safeguarding of the use of described group broadcasting video frequency data the network bandwidth between described multicast switching equipment and the described access switching equipment;
Required bandwidth when described multicast switching equipment and the network bandwidth between the described access switching equipment are not less than the described group broadcasting video frequency data of the concurrent reception of described set-top box that is connected with described access switching equipment.
Preferably, described BAS Broadband Access Server also comprises the clean culture access module, is used for carrying out the access of unicast message;
Described multicast switching equipment also comprises single multicast identification module and clean culture forwarding module, wherein the single multicast identification module is used for forwarding multicasting message and multicast packet between service quality module and request of data replication module, transmits unicast message between service quality module and clean culture forwarding module; The clean culture forwarding module is used for transmitting unicast message between the clean culture access module of single multicast identification module and described BAS Broadband Access Server;
Described set-top box also comprises the clean culture module, is connected to described access switching equipment, is used for carrying out the generation, transmission, reception of unicast message and in the demonstration of playing device.
The present invention also provide a kind of be used for said system for LAN access user provides the Web TV service method, may further comprise the steps:
BAS Broadband Access Server is issued to the multicast switching equipment with the multicast channel authority;
Set-top box sends the multicast channel request message to described multicast switching equipment by inserting switching equipment;
The multicast switching equipment judges that according to described multicast frequency range authority whether described set-top box has the authority of purpose channel in the described multicast channel request message of visit, if not, does not process; If continue;
Described multicast switching equipment duplicates the group broadcasting video frequency data of the described purpose channel that transmits from BAS Broadband Access Server, sends to described set-top box by described access switching equipment;
Described set-top box is play group broadcasting video frequency transfer of data to the playing device of described purpose channel.
Preferably, further comprising the steps of: described multicast switching equipment is divided into a VLAN with each described set-top box.
Preferably, described multicast switching equipment sends the group broadcasting video frequency data of described purpose channel to described set-top box, the multicast path that is specially each VLAN of setting on described multicast switching equipment is sent the group broadcasting video frequency data of described purpose channel by interface IP address to the VLAN at described set-top box place by interface IP address by described multicast path.
Preferably, further comprising the steps of: described multicast switching equipment and described BAS Broadband Access Server move multicast routing protocol, obtain the group broadcasting video frequency data of described purpose channel from described BAS Broadband Access Server.
Preferably, further comprising the steps of: as to carry out the unicast message transmission by described access switching equipment and described multicast switching equipment between described set-top box and the described BAS Broadband Access Server.
Another kind of the present invention provides the system of Web TV service for LAN access user, comprise BAS Broadband Access Server, insert switching equipment, user terminal, with at the multicast switching equipment that inserts between switching equipment and the BAS Broadband Access Server, described multicast switching equipment sends user terminal and verifies via the multicast channel request that access switching equipment transparent transmission is come whether with decision be the group broadcasting video frequency data that described user terminal duplicates its request, if checking is passed through, described multicast switching equipment will switching equipment is transparent to send to described user terminal via inserting the group broadcasting video frequency data of duplicating.
Preferably, described user terminal directly exchanges unicast message with BAS Broadband Access Server via the transparent transmission that inserts switching equipment and multicast switching equipment.
Preferably, described multicast switching equipment is divided into a VLAN with each user terminal.
By the increase multicast switching equipment between BAS Broadband Access Server and access switching equipment, focus on the every function relevant with multicast, make only need that existing broadband metropolitan area network is carried out simple cheaply just transform can the developing interactive network TV business, no longer need to change the access switching equipment; The distribution of multicast channel authority simultaneously terminates in the multicast switching equipment, helps the centralized management to multicast authority.
Description of drawings
Figure 1 shows that in the prior art and provide IPTV the network architecture figure of service for LAN inserts the user;
Figure 2 shows that the present invention provides IPTV the network architecture figure of service for LAN inserts the user;
The module that Figure 3 shows that network system of the present invention is formed structure chart;
Figure 4 shows that the present invention inserts the flow chart that the user provides the IPTV service method for LAN.
Embodiment
Core thinking of the present invention is by increasing one-level multicast switching equipment between switching equipment and the BRAS and finish to the processing of all multicast messages with to the control of multicast channel authority inserting, directly mask the IPTV service interfacing and go into the requirement of switching equipment, so that carry out the IPTV business more easily.
For LAN inserts network architecture that the user provides the IPTV service as shown in Figure 2, user's playing device 50 is connected with set-top box 40 among the present invention; Set-top box 40 is connected to multicast switching equipment 220 by inserting switching equipment 230, and when multicast switching equipment 220 had enough ports, set-top box 40 also can be directly connected to multicast switching equipment 220; Multicast switching equipment 220 is connected to BRAS 10, and BRAS10 is connected with the broadband backbone network.
Set-top box 40 and playing device 50 can be called user terminal together.Multicast switching equipment 220 can send and verifies the group broadcasting video frequency data of whether duplicating its request with decision for this user terminal via inserting multicast channel request that switching equipment 230 transparent transmission come user terminal, if checking is passed through, multicast switching equipment 220 will be the group broadcasting video frequency data of duplicating via inserting the switching equipment 230 transparent user terminals that send to.Can each user terminal be divided into a VLAN by multicast switching equipment 220.
Subscriber terminal equipment also can directly exchange unicast messages with BAS Broadband Access Server 10 via the transparent transmission that inserts switching equipment 230 and multicast switching equipment 220.
Describe the modular structure of system of the present invention in detail below in conjunction with Fig. 3.
BRAS 10 comprises multicast access module 101, multicast access module 101 is handed down to multicast switching equipment 220 by NMP with the multicast channel authority, and according to the request of multicast switching equipment 220, issue at least one cover group broadcasting video frequency data to multicast switching equipment 220, to provide IPTV business to the user.
Carry out the request and the transmission of group broadcasting video frequency data between the multicast access module 101 of multicast switching equipment 220 and BRAS 10 by multicast routing protocol, multicast routing protocol comprises DVMRP (DistanceVector Multicast Routing Protocol, open multicast OSPF) and PIM (ProtocolIndependent Multicast, Protocol Independent Multicast) agreement etc. the distance vector multicast routing protocol), MOSPF (MulticastOpen Shortest Path First:.
Set-top box 40 comprises multicast module 401, multicast module 401 is sent to multicast switching equipment 220 according to the IPTV program of user's program request with the multicast channel request message, and the group broadcasting video frequency data of this channel that multicast switching equipment 220 is returned are sent to playing device 50 and play.
The multicast channel request message comprises IGMP Join/Leave (multicast management protocol adds/leaves) message and IGMP Report (multicast management protocol report) message, send request to multicast switching equipment 220 when wherein IGMP Report message is used for selecting channel for the first time behind set-top-box opening, IGMP Join/Leave message is used for sending request to multicast switching equipment 220 when users with channel switches.
Need also have identical VLAN configuration this moment on access switching equipment 230, therefore on access switching equipment 230, also increase VLAN control module 232, be used for dividing according to the VLAN of 225 pairs of set-top box 40 of VLAN module, the control forwarding module is transmitted in VLAN.VLAN control module 232 is connected between the VLAN module 223 and transparent transmission module 231 of multicast switching equipment 220.
Operator can be according to the set-top box 40 planning different VLAN scheme of concrete needs to inserting, to implement security strategy control.The present invention recommends to adopt PUPV (per user per VLAN, VLAN of each set-top box) pattern, and a unique set-top box of such VLAN sign can realize better fail safe.
Existing broadband metropolitan area network also is that PC (Personal Computer, PC) provides Internet (the Internet) access service simultaneously, set-top box 40 and PC terminal access band metropolitan area network in same network.Therefore, the LAN access service must at first guarantee the safety of set-top box 40, comprise distribute special-purpose address, prevent address embezzlement, the controller top box to the access rights of Internet resources, prevent between IPTV business and the Internet business usurp, control external network to the visit of set-top box 40, other terminal that control comprises PC to the visit of set-top box 40 etc.
Set-top box 40 and PC can pass through PPPoE (Point to Point Protocol over Ethernet is based on the point-to-point protocol of Ethernet) and finish network access authentication by BRAS 10, but adopt different domain names.BRAS is the different address of inserting of devices allocation according to the domain name difference, is generally PC and distributes public network address, distributes private net address for set-top box 40, makes the address space of video traffic and Internet business logically relatively independent.
About to the assurance of set-top box 40 and the address assignment of set-top box 40 and PC, adopt the scheme of prior art to get final product, repeat no more herein.
After making division VLAN, still can adopt original address allocation plan, multicast switching equipment 220 also comprises address memory module 224, be used for storing the multicast path of each VLAN by interface IP address, as the gateway address of this VLAN, VLAN module 223 is controlled multicast replication between VLAN and the group broadcasting video frequency data forwarding in the VLAN by interface IP address according to multicast path.The multicast path of VLAN is independently set by operator by interface IP address.
Be guaranteed qos, need dispose bandwidth according to the concurrent connection number amount of set-top box 40.Because the bandwidth of access network successively restrains, in general the bandwidth bottleneck of downlink traffic is in higher position, end-equipment is supported relatively poor to QoS simultaneously, therefore on multicast switching equipment 220, increase service quality module 225, be connected between request of data replication module 222 and the VLAN module 223, being used for according to the 802.1p agreement is group broadcasting video frequency data maintenance QoS formation, is IPTV flow bandwidth reserved at multicast switching equipment 220 with inserting that network between the switching equipment 230 is connected; Simultaneously, multicast switching equipment 220 with insert network is connected between the switching equipment 230 bandwidth and should be not less than bandwidth required when inserting the concurrent receiving group video data of set-top box that switching equipment 230 is connected 40.
The video traffic of IPTV adopts VOD (Vedio onDemand, the video request program) business of mode of unicast in addition except multicast service.Simultaneously, other of IPTV Internet business professional and PC is also all taked the transmission means of clean culture basically.
In order to make the system of the present invention can compatible clean culture transmission means, in BRAS 10, increase clean culture access module 102, be used for finishing access to unicast message; In multicast switching equipment 220, increase single multicast identification module 226 and clean culture forwarding module 227, wherein single multicast identification module 226 is connected between request of data replication module 222 and the service quality module 225, clean culture forwarding module 227 connects between the clean culture access module 102 of single multicast identification module 226 and BRAS 10, is used for transmitting between the two unicast message; Single multicast identification module 226 will be sent to request of data replication module 222 from multicast packet and the multicast message that service quality module 225 receives, to be sent to clean culture forwarding module 227 from the unicast message that service quality module 225 receives, will be sent to service quality module 225 from the unicast message of clean culture forwarding module 227 receptions and multicast message and the multicast packet that receives from request of data replication module 222; In set-top box 40, increase clean culture module 402, be connected to the transparent transmission module 231 that inserts switching equipment 230, be used for carrying out the generation, transmission, reception of unicast message and in the demonstration of playing device 50.
As seen, to unicast message, multicast switching equipment 220 and access switching equipment 230 direct transparent transmissions are transmitted, and do not do any processing, therefore can not exert an influence for original business.
Particularly, the message that PC carries out broadband access network still follows original path, the distribution of its IP address and the control of other authorities are all carried out on BRAS 10, set-top box 40 is carried out after the PPPoE authentication, it can be assigned to the IP address of public network or private network according to original strategy, this address will be used for and BRAS10 between carry out the VOD business clean culture transmit.Since among the present invention on multicast switching equipment 220 for VLAN has set multicast path by interface IP address, finish the forwarding of multicast packet by the multicast path of VLAN by interface IP address, thereby can not have any impact original IP address assignment strategy.
Of the present inventionly insert flow process that the user provides the IPTV service method as shown in Figure 4 for LAN.At step S10, set-top box is divided into more than one VLAN, as previously mentioned, operator can determine set-top box is divided into the method for VLAN as the case may be, makes each set-top box be in and has better fail safe among the different VLAN.The present invention recommends to adopt the pattern of a VLAN of each set-top box, can realize better fail safe.
At step S20, on the multicast switching equipment, set the multicast path of each VLAN by interface IP address.This multicast path is duplicated and is transmitted by the group broadcasting video frequency data that interface IP address is used for carrying out between the VLAN, and concrete address can independently be set by operator.
At step S30, set-top-box opening, it sends PPPoE information by after inserting switching equipment and multicast switching equipment, is received and is carried out authentication by BRAS, by after the authentication being this set-top box distributing IP address.
At step S40, BRAS is handed down to the multicast switching equipment with the multicast channel authority.
At step S50, user's demanding channel, set-top box sends the multicast channel request message, inserts switching equipment this message is forwarded to the multicast switching equipment; The multicast channel request message comprises IGMP Join/Leave message and IGMP Report message.
At step S60, the multicast switching equipment extracts the purpose channel from the multicast channel request message, judges that according to the multicast frequency range authority that BRAS issues whether this set-top box has the authority of this purpose channel of visit, if not, abandons this multicast channel request message; If, execution in step S70.
At step S70, move multicast routing protocol between multicast switching equipment and the BRAS, obtain the group broadcasting video frequency data of this set-top box demanding channel from BRAS.Multicast routing protocol makes BRAS can issue the group broadcasting video frequency data of its request to the multicast switching equipment, and assurance will be incorporated in the multicast switch by the group broadcasting program stream of set-top box program request.The multicast switching equipment carries out the interpolation of multicast list according to the source address of the channel program of set-top box program request, receives the group broadcasting video frequency data of program request from BRAS by multicast routing protocol.
At step S80, the multicast switching equipment is the VLAN duplicated multicast video data at this set-top box place, and sends the group broadcasting video frequency data to this VLAN; Insert switching equipment the group broadcasting video frequency data are transmitted to set-top box by VLAN.
If a channel has the set-top box program request in a plurality of different VLAN simultaneously, then the multicast switching equipment carries out duplicating between the VLAN of flux of multicast, promptly on the port that the VLAN with this program of program request is connected, carry out multicast replication, give in the VLAN of each this channel of program request and all duplicate a group broadcasting video frequency data, guarantee that the group broadcasting video frequency data propagate into the set-top box of this channel of program request point-to-pointly.
At step S90, set-top box sends the group broadcasting video frequency data to playing device, and playing device is play the program of user's demanding channel, and the user watches program.
As previously mentioned, for unicast message, access switching equipment and multicast switching equipment only run up to show effect between set-top box and BRAS and use.
It is as follows that the present invention carries out the handling process that group broadcasting program selects after to a set-top-box opening:
Set-top-box opening carries out authentication by the mode of PPPoE by BRAS, and BRAS is its distributing IP address simultaneously;
The user selects certain channel, and set-top box sends IGMP Report message, requires to add corresponding multicast group;
IGMP Report is forwarded to the multicast switching equipment, and access switching equipment is not on the way handled the IGMPReport message, only transmits according to common message;
The multicast switching equipment is resolved this message after listening to IGMP Report message, and whether discern this set-top box by VLAN has the authority that adds this multicast group, if having, then by the group broadcasting video frequency data of multicast routing protocol to the program request of BRAS request set-top box; If no, then abandon this message;
The group broadcasting video frequency data distributing is to the multicast switching equipment, and the multicast switching equipment carries out the group broadcasting video frequency data according to VLAN and duplicates;
Insert switching equipment the group broadcasting video frequency data are sent to set-top box by VLAN, the user watches the program of program request.
As seen, in order to insert the otherness of switching equipment in the better original broadband metropolitan area network of shielding, the present invention is at the BRAS of existing network and insert and increased one-level between the switching equipment and be specifically designed to the multicast switching equipment that carries out multicast replication.The multicast switching equipment carries out two layers of transparent transmission to the unicast message that comprises ordinary Internet message and VOD message, carry out the multicast authority control of set-top box simultaneously and between different VLAN, carry out multicast replication, needn't change the purpose that existing access switching equipment also can be carried out the IPTV business thereby reach, thereby provide better choice for the transformation of existing broadband metropolitan area network.
Above-described embodiment of the present invention does not constitute the qualification to protection range of the present invention.Any any modification of being done within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within the claim protection range of the present invention.
Claims (14)
1. one kind for LAN access user provides the system of Web TV service, it is characterized in that, comprises BAS Broadband Access Server, multicast switching equipment, set-top box and playing device, wherein:
Described BAS Broadband Access Server comprises the multicast access module, is used for issuing the multicast channel authority and according to the request of described multicast switching equipment, issuing at least one cover group broadcasting video frequency data to described multicast switching equipment;
Described set-top box comprises the multicast module, is used for sending the multicast channel request message to described multicast switching equipment, and the group broadcasting video frequency data that described multicast switching equipment transmits are sent to described playing device broadcast;
Described multicast switching equipment comprises control of authority module and request of data replication module, after the described set-top box of multicast channel Authority Verification that wherein control of authority module issues according to described BAS Broadband Access Server has the access rights of purpose channel in the described multicast channel request message, send instruction to the request of data replication module; The request of data replication module is received instruction, asks the group broadcasting video frequency data of the described purpose channel that described BAS Broadband Access Server sends, and transfers to described set-top box after it is duplicated.
2. described for LAN access user provides the system of Web TV service according to claim 1, it is characterized in that: described system also comprises the access switching equipment, is connected between described multicast switching equipment and the described set-top box; Described access device comprises the transparent transmission module, is used for E-Packeting and data.
3. according to the described system that the Web TV service is provided for LAN access user of claim 2, it is characterized in that: described multicast switching equipment also comprises the VLAN module, be connected between request of data replication module and the described access switching equipment, being used for that described set-top box is carried out VLAN divides, control data request replication module carries out duplicating of group broadcasting video frequency data between described VLAN, control group broadcasting video frequency data are transmitted in described VLAN;
Described access switching equipment also comprises the VLAN control module, is connected between described multicast switching equipment and the described transparent transmission module, is used for controlling described transparent transmission module and transmits data and message in described VLAN.
4. described it is characterized in that: described multicast switching equipment also comprises the address memory module for LAN access user provides the system of Web TV service according to claim 3, and the multicast path of each VLAN that is used for storing setting is by interface IP address; And described multicast path offered described VLAN module to control duplicating and transmitting of described group broadcasting video frequency data by interface IP address.
5. according to the described system that the Web TV service is provided for LAN access user of claim 4, it is characterized in that: described multicast switching equipment also comprises the service quality module, be connected between request of data replication module and the VLAN module, be used for safeguarding of the use of described group broadcasting video frequency data the network bandwidth between described multicast switching equipment and the described access switching equipment;
Required bandwidth when described multicast switching equipment and the network bandwidth between the described access switching equipment are not less than the described group broadcasting video frequency data of the concurrent reception of described set-top box that is connected with described access switching equipment.
6. described for LAN access user provides the system of Web TV service according to claim 5, it is characterized in that: described BAS Broadband Access Server also comprises the clean culture access module, is used for carrying out the access of unicast message;
Described multicast switching equipment also comprises single multicast identification module and clean culture forwarding module, wherein the single multicast identification module is used for forwarding multicasting message and multicast packet between service quality module and request of data replication module, transmits unicast message between service quality module and clean culture forwarding module; The clean culture forwarding module is used for transmitting unicast message between the clean culture access module of single multicast identification module and described BAS Broadband Access Server;
Described set-top box also comprises the clean culture module, is connected to described access switching equipment, is used for carrying out the generation, transmission, reception of unicast message and in the demonstration of playing device.
One kind be used for the described system of claim 1 for LAN access user provides the Web TV service method, it is characterized in that, may further comprise the steps:
BAS Broadband Access Server is issued to the multicast switching equipment with the multicast channel authority;
Set-top box sends the multicast channel request message to described multicast switching equipment by inserting switching equipment;
The multicast switching equipment judges that according to described multicast frequency range authority whether described set-top box has the authority of purpose channel in the described multicast channel request message of visit, if not, does not process; If continue;
Described multicast switching equipment duplicates the group broadcasting video frequency data of the described purpose channel that transmits from BAS Broadband Access Server, sends to described set-top box by described access switching equipment;
Described set-top box is play group broadcasting video frequency transfer of data to the playing device of described purpose channel.
8. for providing the Web TV service method, LAN access user it is characterized in that according to claim 7 is described that further comprising the steps of: described multicast switching equipment is divided into a VLAN with each described set-top box.
9. describedly according to Claim 8 provide the Web TV service method for LAN access user, it is characterized in that: described multicast switching equipment sends the group broadcasting video frequency data of described purpose channel to described set-top box, the multicast path that is specially each VLAN of setting on described multicast switching equipment is sent the group broadcasting video frequency data of described purpose channel by interface IP address to the VLAN at described set-top box place by interface IP address by described multicast path.
10. describedly provide the Web TV service method for LAN access user according to any one of claim 7 to 9, it is characterized in that, further comprising the steps of: described multicast switching equipment and described BAS Broadband Access Server move multicast routing protocol, obtain the group broadcasting video frequency data of described purpose channel from described BAS Broadband Access Server.
11. provide the Web TV service method for LAN access user according to claim 10 is described, it is characterized in that, further comprising the steps of: as to carry out the unicast message transmission by described access switching equipment and described multicast switching equipment between described set-top box and the described BAS Broadband Access Server.
12. system that the Web TV service is provided for LAN access user, it comprises BAS Broadband Access Server, insert switching equipment, user terminal, it is characterized in that: this system also comprises at the multicast switching equipment that inserts between switching equipment and the BAS Broadband Access Server, described multicast switching equipment sends user terminal and verifies via the multicast channel request that access switching equipment transparent transmission is come whether with decision be the group broadcasting video frequency data that described user terminal duplicates its request, if checking is passed through, described multicast switching equipment will switching equipment is transparent to send to described user terminal via inserting the group broadcasting video frequency data of duplicating.
13. according to claim 12 for LAN access user provides the system of Web TV service, it is characterized in that: described user terminal directly exchanges unicast message with BAS Broadband Access Server via the transparent transmission that inserts switching equipment and multicast switching equipment.
14. according to claim 13 for LAN access user provides the system of Web TV service, it is characterized in that: described multicast switching equipment is divided into a VLAN with each user terminal.
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Address after: 310052 Binjiang District Changhe Road, Zhejiang, China, No. 466, No. Patentee after: Xinhua three Technology Co., Ltd. Address before: 310053 Hangzhou hi tech Industrial Development Zone, Zhejiang province science and Technology Industrial Park, No. 310 and No. six road, HUAWEI, Hangzhou production base Patentee before: Huasan Communication Technology Co., Ltd. |