CN101095353A - A system and method for grouping program identifiers into multicast groups - Google Patents

A system and method for grouping program identifiers into multicast groups Download PDF

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Publication number
CN101095353A
CN101095353A CNA2005800458362A CN200580045836A CN101095353A CN 101095353 A CN101095353 A CN 101095353A CN A2005800458362 A CNA2005800458362 A CN A2005800458362A CN 200580045836 A CN200580045836 A CN 200580045836A CN 101095353 A CN101095353 A CN 101095353A
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program identifier
satellite
identifier group
request
group
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CN101095353B (en
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加里·罗伯特·古特克内希特
巴里·杰伊·韦伯
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Thomson Licensing SAS
International Digital Madison Patent Holding SAS
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Thomson Licensing SAS
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/20—Adaptations for transmission via a GHz frequency band, e.g. via satellite
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2408—Monitoring of the upstream path of the transmission network, e.g. client requests
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/2668—Creating a channel for a dedicated end-user group, e.g. insertion of targeted commercials based on end-user profiles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6143—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a satellite
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/64—Addressing
    • H04N21/6405—Multicasting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64322—IP

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Radio Relay Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The disclosed embodiment relates to a system and method used for grouping program identifiers into multicast groups, in particular to a method that includes the steps of receiving a request which comes from a mechanism (22) in the requesting side aiming at satellite services and includes at least a program identifier; establishing a second program identifier group; comparing the requested program identifier with the first program identifier group which is stored at a satellite service providing mechanism (14) and is requested previously; and transferring the matched program identifier to a second program identifier group from the first program identifier group if the requested program identifier is matched with one of that in the first program identifier group, wherein the multicast of the second program identifier group is suitable to be shared by the mechanism (22) in the requesting side and the other mechanism.

Description

Be used for program identifier is grouped into the system and method for multicast group
Technical field
The present invention relates generally to and send video or other numerical data on network.More specifically, the present invention relates to a kind of system, be used for program identifier (" PID ") is grouped into multicast group (multicast group) to be used for Internet protocol (" IP ") transmission, so that provide unbroken service to the client.
Background technology
These chapters and sections are intended to introduce and describe below and/or the claimed relevant various prior aries of many aspects of the present invention to the reader.Believe that this discussion helps to provide background technology so that understand many aspects of the present invention better to the reader.Therefore, should be understood that, read these statements from this angle, and should be with its statement as prior art.
In the past few years, most of people recognize, and are more and more general such as the satellite TV system of DirecTV.In fact, because the introducing of DirecTV in 1994, more than 1,200 ten thousand American families begin to become satellite TV subscribers.Live in the place of relatively easy installation and clutch disk formula satellite tv antenna most of houses not sharing an entrance with others among these subscribers.For example, satellite dish can be installed on the roof.
Yet, a lot of potential subscribers lives or tent in multitenant unit (" MDU "), for example hotel or the high-rise block of flats.Unfortunately, the flat of each in MDU provides satellite TV can relate to extra challenge.It is unpractical providing and connect a satellite dish for each resident family, and/or extremely expensive.For example, in the high-rise block of flats that has 1,000 apartments, it is unpractical at the building roof 1,000 satellite dish being installed.Some traditional systems have avoided these problems by being the analog signal that can be sent to a plurality of resident families by single coaxial cable with the digital satellite television conversion of signals.Yet these systems provide limited channel, compare with all-digital signal, and quality descends, and the satellite television that the user was accustomed to that can't provide house not sharing an entrance with others to live is experienced.
Need a kind of improved system and/or method, be used for providing satellite television to multitenant unit.
Summary of the invention
Aspect some that proposes below on scope to be consistent with at first claimed the present invention.Should be appreciated that these aspects only propose to be used for to provide the brief description of some form that perhaps the present invention adopt to the reader, and these aspects and be not intended to limit the scope of the invention.In fact, the many aspects that do not provide below the present invention can comprise.
The disclosed embodiments relate to the system and method that is used for program identifier is grouped into multicast group.More specifically, provide a kind of method, having comprised: receive the request at satellite service from requesting party's device (22), wherein this request comprises at least one program identifier; Create the second program identifier group; The program identifier of being asked is compared with the first program identifier group of previous request on being stored in satellite service generator (14); And if one of the program identifier in the program identifier of being asked and the first program identifier group is complementary, then the program identifier that is mated is moved to the second program identifier group from the first program identifier group, wherein the multicast of the second program identifier group is suitable for being shared by requesting party's device (22) and another device.
Description of drawings
During detailed explanation, advantage of the present invention will become apparent below reading in conjunction with the accompanying drawings, in the accompanying drawing:
Fig. 1 is the block diagram of exemplary according to an embodiment of the invention satellite Internet Protocol Television system;
Fig. 2 is another embodiment of exemplary satellite Internet Protocol Television system shown in Figure 1;
Fig. 3 is the block diagram of exemplary satellite gateway of the present invention; And
Fig. 4 shows the flow chart that is used for program identifier is grouped into multicast group according to the embodiment of the invention.
Embodiment
The one or more specific embodiments of various details.For the concise and to the point description of these embodiment is provided, all features of actual execution mode are not described in specification.Should be realized that, as in any engineering or the design object, in the exploitation of any actual execution mode, must make the specific decision-making of a plurality of execution modes, to realize developer's specific purpose, the compatibility of for example relevant and commercial relative restrictions with system, and this is different for different execution modes.In addition, should be realized that perhaps this exploitation is complicated and consuming time, but for benefiting from those of ordinary skill of the present disclosure, be the regular works of design, making and manufacturing.
Turn to Fig. 1, Reference numeral 10 is represented generally and is shown block diagram according to the exemplary satellite Internet Protocol Television system of an embodiment.As shown in the figure, in one embodiment, system 10 can comprise head end (head-end) unit, IP distributing network (IP distribution network) 20 and one or more set-top box (" STB ") 22a to 22n of one or more satellite dish 12a to 12m, for example satellite gateway 14.Yet those of ordinary skill in the art can recognize that the embodiment of system 10 shown in Figure 1 only is that of system 10 may embodiment.Similarly, in optional embodiment, assembly shown in the reconfigurable or omission system 10 perhaps can add add-on assemble to system 10.For example, under the situation of small modification, system 10 can be configured to distributed non-satellite video and audio service.
Satellite dish 12a-12m can be configured to receiver, video, audio frequency or from other categorical data earth-circling satellite transmission and TV-related.To describe below, in one embodiment, satellite dish 12a-12m configuration is used to be received in the DirecTV that the KU wave band of from 10.7 to 12.75 Gigahertzs (" GHz ") is worked out.Yet, in optional embodiment, configurable direct broadcasting satellite (" DBS ") or TVRO television receive-only (" TVRO ") signal, for example Dish network signal, ExpressVu signal, the StarChoice signal etc. that are used to receive other type of satellite dish 12a-12m.In other not satellite-based system, can omit satellite dish 12a-12m in the system 10.
In one embodiment, the low noise block transducer among the satellite dish 12a-12m (" LNC ") is from around ground satellite receiving inputted signal, and these input signals is converted to the frequency of the L-band of 950 and 2150 megahertzes (" MHz ").To describe in further detail below in conjunction with Fig. 2, the configurable one or more input satellite TV signals that are used to be received on the characteristic frequency and have particular polarization of among the satellite 12a-12m each (being called transponder (transponder)), and be used for these satellite-signals are converted to the L-band signal, each L-band signal can comprise a plurality of videos or audio signal.
Satellite dish 12a-12m configurable being used for sends to head-end unit or gateway server with the L-band signal, and for example satellite gateway 14.In optional non-satellite embodiment, head-end unit can be wired television receiver, high definition television receiver or other video distribution system.
Satellite gateway 14 comprises that satellite is tuning, demodulation Multiplexing module 16 and IP wrapper (wrapper) module 18.Module 16 can comprise a plurality of tuners, demodulator and demodulation multiplexer, with will from satellite 12a-12m send through the modulation and multiplexing L-band conversion of signals be a plurality of single programs transport stream (" SPTS "), each SPTS all is loaded with service (for example television channel video, television channel audio frequency, program guide etc.).In one embodiment, module 16 configuration is used for all services of being received at satellite dish 12a-12m, produces the single programs transport stream.Yet in optional embodiment, the subclass of the service that module 16 can be only received at satellite dish 12a-12m produces transport stream.
Satellite is tuning, demodulation Multiplexing module 16 can send to SPTS IP wrapper module 18.In one embodiment, IP wrapper module 18 is grouped into the data among the SPTS a plurality of Internet protocols (" the IP ") grouping that is adapted at transmission on the IP distributing network 20 again.For example, IP wrapper module 18 can be converted to the DirectTV protocol packet among the SPTS IP grouping.In addition, 18 configurable being used for of IP wrapper from the request of STB 22a-22n reception server, and with IP SPTS multicast (that is, broadcasting to one or more STB 22a-22n by the IP address) these STB 22a-22n to the request special services.
In optional embodiment, the also configurable not IP agreement SPTS of requested service of one of multicast STB22a-22n that is used for of IP wrapper module 18.Should be noted that module 16 and 18 only is an one exemplary embodiment of satellite gateway 14.In optional embodiment, for example below in conjunction with Fig. 2 and 3 described embodiment, module 16 and 18 function can be redistributed or make up in multiple suitable assembly or module.
IP distributing network 20 can comprise one or more routers, switch, modulator-demodulator, splitter or bridge.For example, in one embodiment, satellite gateway 14 can with main-frame (distribution frame, " MDF ") link to each other, MDF links to each other with intermediate distrubuting frame (" IDF "), IDF links to each other with the coaxial cable of Ethernet bridge, and Ethernet bridge links to each other with router, one or more the linking to each other among router and the STB 22a-22n.In another embodiment, IP distributing network 20 can be the MDF that links to each other with Digital Subscriber Line Access Multiplexer (" DSLAM "), and DSLAM links to each other with the DSL modulator-demodulator, and the DSL modulator-demodulator links to each other with router.In another embodiment, the IP distributing network can comprise wireless network, for example 802.11 or the WiMax network.In such an embodiment, STB 2a-22n can comprise that configuration is used for the wireless receiver of receiving group IP grouping.Those of ordinary skill in the art will appreciate that the foregoing description only is exemplary.Equally, in optional embodiment, can in system 10, adopt the IP distributing network of a large amount of appropriate formats.
IP distributing network 20 can link to each other with one or more STB 22a-22n.STB 22a-22n can be video, audio frequency or other data receiver that can receive for example IP grouping of IP SPTS on IP distributing network 20 of arbitrarily suitable type.Can recognize that term set-top box used herein (" STB ") not only can comprise the equipment that is positioned on the television set.But STB22a-22n can be at television set, display or computer-internal or outside any apparatus or device, is described as can be configured to video recorder including, but not limited to video component, computer, radio telephone or other form at this.In certain embodiments, STB 22a-22n also can be called as integrated receiver decoder (" IRD ").
In one embodiment, STB 22a-22n can be that configuration is used for receiving for example DirectTV receiver of the service of video and/or audio by (other input) ethernet port.Yet in optional embodiment, STB 22a-22n can design and/or dispose the multicast transmission that is used to receive on coaxial cable, twisted-pair feeder, the copper cash, perhaps via for example wireless transmission of the wireless standard of IEEE 802.11 standards.
As mentioned above, system 10 can receive video, audio frequency and/or other data that satellite sends in the space, and these data of processing/conversion are so that distribution on IP distributing network 20.Therefore, Fig. 2 is another embodiment according to the exemplary satellite Internet Protocol Television system 10 of an embodiment.Fig. 2 shows three exemplary satellite dish 12a-12c.Each satellite dish 12a-12c is configurable to be used to receive from one or more signals around the ground satellite.Those of ordinary skill in the art can recognize, mentions satellite and the signal that comes from satellite transmission with the rail groove (orbital slot) at satellite place usually.For example, satellite dish 12a configuration is used to receive the signal from the DirecTV satellite of the rail groove that is positioned at 101 degree.Similarly, satellite dish 12b receives the signal from the satellite that is positioned at 119 degree, and satellite dish 12c receives the signal from the satellite of the rail groove that is positioned at 110 degree.Can recognize that in optional embodiment, satellite dish 12a-12c can receive from being positioned at for example signal of a plurality of other satellites of a plurality of rail grooves of 95 degree rail grooves.In addition, satellite dish 12a-12c can also dispose the satellite-signal that is used to receive polarization.For example, in Fig. 2, satellite dish 12a configuration is used to receive the signal of left side polarization (being " 101L " shown in the figure) and right polarization (being depicted as " 101R ").
As above in conjunction with Figure 1, satellite dish 12a-12c can receive the satellite-signal of KU wave band, and these conversion of signals are the L-band signal that will send to satellite gateway 14.Yet, in certain embodiments, can before arrive satellite gateway 14, the L-band signal that satellite dish 12a-12c is produced be merged into signal still less or be split into more signal.For example, as shown in Figure 2, can will merge into single L-band signal from the L-band signal of disc type satellite tv antenna 12b and 12c by switch 24, this single L-band signal comprises the L-band signal from the satellite of the satellite of 110 degree and 119 degree.
As shown in the figure, system 10 also can comprise a plurality of 1:2 splitter 26a, 26b, 26c and 26d, be used for being divided into two L-band signals from the L-band signal that satellite dish 12a-12c sends, each L-band signal comprises half of service of the L-band signal before the division.In optional embodiment, 1:2 splitter 26a-26b can omit or be integrated among satellite gateway 14a and the 14b.
The L-band signal that newly divides can be sent to satellite gateway 14a and 14b from 1:2 splitter 26a-26d.The embodiment of system 10 shown in Figure 2 comprises two satellite gateway 14a and 14b.Yet in optional embodiment, system 10 can comprise the satellite gateway 14 of any proper number.For example, in one embodiment, system can comprise three satellite gateways 14.
Satellite gateway 14a and 14b also can further segment the L-band signal, then be tuned to one or more services on the L-band signal, can be grouped into the IP grouping again and one or more SPTS of multicast on IP distributing network 20 to produce.In addition, one or more satellite gateway 14a, 14b also can link to each other with PSTN (" PSTN ") 28.Because satellite gateway 14a, b link to each other with PSTN 28, so STB 22a-22n can pass through IP distributing network 20 and satellite gateway 14a, b, provider communicates with satellite service.This function has advantageously been eliminated the needs that directly link to each other with PSTN 28 for each independent STB22a-22n.
IP distributing network 20 also can link to each other with ISP (" ISP ") 30.In one embodiment, other suitable equipment (not shown) that IP distributing network 20 can be used for linking to each other to STB 22a-22n and/or with IP distributing network 20 provides Internet service, and for example high-speed data inserts.
As mentioned above, satellite gateway 14a, b can dispose and be used to receive a plurality of L-band signals, producing a plurality of SPTS, and the SPTS that multicast is asked on IP distributing network 20.Referring now to Fig. 3, Fig. 3 shows the block diagram of exemplary satellite gateway 14.As shown in the figure, satellite gateway 14a, b comprise power supply 40, two front end 41a and 41b and rear ends 52.Power supply 40 can be any one in a plurality of industrial standard AC or the DC power supply, configurablely is used to make front end 41a, b and rear end 52 can carry out following described function.
Satellite gateway 14a, b also can comprise two front end 41a, b.In one embodiment, all configurable two the L-band signal inputs that are used to receive from reference to figure 2 described 1:2 splitter 26a-26d of each front end 41a, b.For example, front end 41a can receive two L-band signals from 1:2 splitter 26a, and front end 41b can receive two L-band signals from 1:2 splitter 26b.In one embodiment, each L-band of input front end 41a, b includes eight or service still less.
Front end 41a, b can use 1:4 L- band splitter 42a, 42b, 42c and 42d further to segment the L-band input then.In case segmented, then the L-band signal can be by entering four groups (bank) 44a, 44b, 44c and the 44d of dual tuner links.Among the group 44a-44d each dual tuner links all configurable be used for be tuned to two services in the L-band signal that receives by independent dual tuner links, to produce SPTS.Each dual tuner links can send to SPTS one of Low Voltage Differential Signal (" LVDS ") driver 48a, 48b, 48c and 48d then.Lvds driver 48a-48d is configurable to be used to amplify transmission signals to send to rear end 52.In optional embodiment, replace lvds driver 48a-48d, can adopt multi-form differential driver and/or amplifier.Other embodiment can adopt all transmission signals serializations, to be routed to rear end 52 in the lump.
As shown in the figure, front end 41a, b also can comprise microprocessor 46a and 46b.In one embodiment, microprocessor 46a, 46b may command and/or relay commands are to the group 44a-44d and the 1:4L wave band splitter 42a-42d of dual tuner links.Microprocessor 46a, b can comprise the ST10 microprocessor that adopts ST microelectric technique to produce.Microprocessor 46a, b can link to each other with 50b with sender module 50a with the LVDS receiver.LVDS receiver/sender module 50a, b can make things convenient for the communication between components on microprocessor 46a, b and the rear end 52, and be as described below.
Next turn to rear end 52, rear end 52 comprises LVDS receiver 54a, 54b, 54c and 54d, and LVDS receiver 54a, 54b, 54c and 54d configuration are used to receive the transmission stream signal that lvds driver 48a-48d is sent.Rear end 52 also comprises LVDS receiver/sender module 56a and 56b, and LVDS receiver/sender module 56a and 56b configuration are used for communicating with LVDS receiver/sender module 50a, b.
As shown in the figure, LVDS receiver 54a-54d and LVDS receiver/transmitter 56a, b configuration is used for communicating with transmission processor 58a and 58b.In one embodiment, transmission processor 58a, b configuration is used for being received in front end 41a, b by SPTS that dual tuner links produced.For example, in one embodiment, transmission processor 58a, 58b be configurable to be used to produce 16 SPTS.Transmission processor 58a, b be configurable be used for SPTS be grouped into again can be on IP distributing network 20 the IP grouping of multicast.For example, transmission processor 58a, b can be grouped into the IP protocol packet again with the DirecTV protocol packet, these IP are multicast to one or more STB 22a-22n then on the IP address.
Transmission processor 58a, b can also link to each other with for example 32, the bus 62 of 66Mz peripheral component interconnect (" PCI ") bus.By bus 62, transmission processor 58a, b can communicate with network processing unit 70, Ethernet interface 84 and/or expansion slot 66.The configurable requests that are used to receive from STB 22a-22n of network processes 70, and command transfer processor 58a, b multicast institute requested service at service.In one embodiment, network processing unit is the IXP425 network processing unit that intel produces.Although not shown, network processing unit 70 can also dispose the panel (front panel) that is used for status data is sent to satellite gateway 14a, b, or supports debugging or supervision to satellite gateway 14a, b by debug port.
As shown in the figure, transmission processor 58a, b also can link to each other with Ethernet interface 68 via bus 62.In one embodiment, Ethernet interface 68 provides towards the copper cash of IP distributing network 20 or the gigabit ethernet interface of optical fiber interface.In addition, bus 62 also can link to each other with the expansion slot of for example pci expansion slot, so that can upgrade or expand satellite gateway 14a, b.
Transmission processor 58a, b also can link to each other with contour (host bus) 64.In one embodiment, contour 64 is 16 bit data bus that transmission processor 58a, b are connected to modulator-demodulator 72, and wherein 72 configurable being used for of modulator-demodulator communicate by aforesaid PSTN 28.In optional embodiment, modulator-demodulator 72 also can link to each other with bus 62.
As mentioned above, satellite gateway 14 is configurable with the service that receives such as video, audio frequency or other data, and by IP distributing network 20 these service multicast is arrived STB 22a-22n.In one embodiment, satellite gateway 14 comes multicast services by related service being grouped into single multicast.For example, if the video and the audio frequency of one of STB 22a-22n request ABC television broadcasting, then one of satellite gateway 14 program identifier of the video section of ABC broadcasting can be grouped into satellite gateway 14 together with the program identifier of the audio-frequency unit of ABC broadcasting can be in the multicast group of particular ip address multicast.If the identical ABC broadcasting with identical audio frequency is watched in another hope among the STB 22a-22n, then satellite gateway 14 can be ordered STB 22a-22n visit and the previous relevant IP address of multicast group of creating.
Above-mentioned technology can be created multicast group well when program identifier has static relation.Yet as described below, complicated more if the program identifier relation becomes, perhaps supplementary technology is favourable.For example, above-mentioned ABC broadcasting is perhaps by another request with the CBS of ABC broadcasting split screen of request among of the NBC broadcasting of only asking request and ABC broadcasting split screen (split-screened) among one of ABC broadcasting, STB 22a-22n among the STB 22a-22n and the STB 22a-22n.In this case, create a multicast group including only ABC broadcasting, comprise another multicast group of NBC broadcasting and ABC broadcasting and comprise ABC broadcasting and another multicast group of CBS broadcasting utilized bandwidth effectively perhaps.
Therefore, Fig. 4 shows the flow chart that program identifier is grouped into the exemplary technique scheme 80 of multicast group according to an embodiment.Shown in Figure 82, technical scheme 80 can start from counter SPTSNum and be set to equal zero, and empties the set of the system's program identifier (" PID ") that is called as the PIDset of system.System PISset can be that satellite gateway 14 is current just in the PIDset array of multicast multicast or previous.Next, shown in piece 83, satellite gateway can be created conflict PIDset.In one embodiment, each transponder that satellite gateway 14 can receive at satellite gateway 14 is created a conflict PIDset.Yet, in optional embodiment, can use various criterion to create conflict PIDset.
After having created conflict PIDset, shown in piece 84, satellite gateway 14 can receive from one of STB 22a-22n (referring to Fig. 1), comprise the request at the PID of one or more services.In case satellite gateway 14 receives the PID request, then shown in piece 86, satellite gateway 14 can be grouped into the PID that is asked the interim PIDset of the STB of the request of sending, and this PIDset is called as client PIDset.
After the PID that grouping is asked, shown in piece 88, satellite gateway 14 can determine that whether the number of SPTS is greater than zero.If the number of SPTS equals zero (promptly being not more than zero), then as described below, technical scheme 80 will advance to piece 102.Yet, if the number of SPTS greater than zero, shown in piece 90, satellite gateway 14 determines whether client PIDset and the PIDset of system have common factor (being whether to have among the client PIDset among the PIDset of PID in the PIDset of system array).If client PIDset and the PIDset of system do not have common factor, then as following further described, technical scheme 80 will advance to piece 102.
Yet if client PIDset really has common factor with the PIDset of system, shown in piece 92, satellite gateway 14 determines that whether client PIDset are having common factor more than a PID place and more than one system PIDset.If client PIDset only has common factor at a PID place, then shown in piece 94, satellite gateway 14 can with among the client PIDset as yet not the PID in the system PIDset that occurs simultaneously add among the system PIDset of common factor.In optional embodiment, can omit piece 92 in the technical scheme 80, and satellite gateway 14 can advance to piece 98, and no matter the number that occurs simultaneously.Get back to piece 96, in case added common factor PID to system PIDset that common factor is arranged, then satellite gateway 14 can respond the STB 22a-22n of the request of sending with the IP address of the multicast group of the system PIDset (comprising an extra PID among the client PIDset now) that comprises common factor.In addition, conflict after a while includes under the situation of a PID among the system PIDset of common factor, even conflict PIDset is empty, satellite gateway 14 also can respond with the multicast of the conflict PIDset of the transponder relevant with client PIDset, so that STB 22a-22n can monitor the conflict multicast.After response, when another request service among the STB 22a-22n, this technical scheme piece 84 of getting back to capable of circulation.
Steering block 92, if client PIDset is having common factor more than a PID place and the PIDset of system, then shown in piece 98, satellite gateway 14 can have the crossing PID of system PIDset that removes client PIDset and common factor is arranged the system PIDset of common factor from each.Next, shown in piece 100, satellite gateway 14 can add common factor PID among the conflict PIDset.After having created conflict PIDset, shown in piece 102, satellite gateway 14 can add client PIDset in the PIDset of the system array, and shown in piece 104, counter SPTSNum is increased progressively.
After carrying out these tasks, satellite gateway 14 can and comprise the STB 22a-22n that responds the request of sending from the multicast group of the PID of the PIDset that conflicts with the multicast group that comprises the PID (being that aforementioned client PIDset deducts the PID among the conflict PIDset) from the PIDset of system array at SPTSNum-1 place, array position.As mentioned above, conflict after a while relates under the situation of a PID among the client PIDset, even conflict PIDset is empty (being that SPTSNum equals zero), satellite gateway 14 also can respond with the multicast group of the relevant conflict PIDset of the transponder relevant with client PIDset, so that STB can monitor the conflict multicast.At last, as shown in the figure, when another request in STB 22a-22n is served, technical scheme 80 pieces 84 of getting back to capable of circulation.
Can be easily carry out multiple modification and adopt the plurality of optional form the present invention, the accompanying drawing example of passing the imperial examinations at the provincial level shows specific embodiment simultaneously, and is described in detail at this.Yet, should be appreciated that the present invention also is not intended to be subject to particular forms disclosed.But the present invention covers all modifications, equivalent and the optional thing that falls in the spirit and scope of the invention that is defined by the following claims.

Claims (20)

1. method comprises:
Reception is from the request at satellite service of requesting party's device (22), and wherein said request comprises at least one program identifier;
Create the second program identifier group;
The program identifier of being asked is compared with the first program identifier group of previous request on being stored in satellite service generator (14); And
If one of program identifier in the program identifier of being asked and the first program identifier group is complementary, then the program identifier that is mated is moved to the second program identifier group from the first program identifier group, wherein the multicast of the second program identifier group is suitable for being shared by requesting party's device (22) and another device.
2. method according to claim 1 comprises: will send to requesting party's device (22) with the service that the second program identifier group is associated.
3. method according to claim 2, wherein, the service of transmission comprises: by the described service of IP distributing network (20) multicast.
4. method according to claim 1 comprises:
Create the 3rd program identifier group, the 3rd program identifier group comprise not with the first program identifier group in the program identifier of being asked of one of program identifier coupling; And
The service that will be associated with the program identifier in the 3rd program identifier group sends to requesting party's device (22).
5. method according to claim 4 comprises: the 3rd program identifier group is stored on the satellite service generator (14).
6. method according to claim 1, wherein, the request at satellite service that receives from requesting party's device (22) comprises: receive the request at the DirecTV satellite programming.
7. method according to claim 1, wherein, the request at satellite service that receives from requesting party's device comprises: receive the satellite television request from set-top box.
8. system comprises:
Head-end unit (14), configuration is used for:
Reception is from the request at satellite service of requesting party's device (22), and wherein said request comprises at least one program identifier;
Create the second program identifier group;
The program identifier of being asked is compared with the first program identifier group of previous request on being stored in satellite service generator (14); And
If one of program identifier in the program identifier of being asked and the first program identifier group is complementary, then the program identifier that is mated is moved to the second program identifier group from the first program identifier group, wherein the multicast of the second program identifier group is suitable for being shared by requesting party's device (22) and another device.
9. system according to claim 8, wherein, head-end unit (14) configuration is used for the service that the program identifier with the second program identifier group is associated is sent to requesting party's device (22).
10. system according to claim 8, wherein, head-end unit (14) configuration is used for the service that the program identifier with the second program identifier group is associated is sent to set-top box (22).
11. system according to claim 8, wherein, head-end unit (14) configuration is used for by IP distributing network (20) service multicast being arrived set-top box (22).
12. system according to claim 8, wherein, head-end unit (14) configuration is used for:
Create the 3rd program identifier group, the 3rd program identifier group comprise not with the first program identifier group in the program identifier of being asked of one of program identifier coupling; And
The service that will be associated with the program identifier in the 3rd program identifier group sends to requesting party's device (22).
13. system according to claim 8, wherein, the head-end unit configuration is used to receive the request at the DirecTV satellite programming.
14. a head-end unit (14) comprising:
Be used for receiving the device at the request of satellite service from requesting party's device (22), wherein said request comprises at least one program identifier;
Be used to create the device of the second program identifier group;
The device that the first program identifier group of the previous request on being used for the program identifier of will be asked and being stored in satellite service generator (14) is compared; And
Be used for when one of program identifier of the program identifier of being asked and the first program identifier group is complementary the program identifier that will be mated and move to the device of the second program identifier group from the first program identifier group, wherein the multicast of the second program identifier group is suitable for being shared by requesting party's device (22) and another device.
15. head-end unit according to claim 14 (14) comprising: the device that is used for the service that the program identifier with the second program identifier group is associated is sent to requesting party's device (22).
16. head-end unit according to claim 14 (14) comprising: be used for by IP distributing network (20) with the device of service multicast to set-top box (22)
17. head-end unit according to claim 14 (14) comprising:
Be used to create the device of the 3rd program identifier group, the 3rd program identifier group comprise not with the first program identifier group in the program identifier of being asked of one of program identifier coupling; And
The service that is used for being associated with the program identifier of the 3rd program identifier group sends to the device of requesting party's device (22).
18. head-end unit according to claim 14 (14) comprising: be used for the 3rd program identifier group is stored in device on the head-end unit (14).
19. head-end unit according to claim 14 (14), wherein, the device at the request of satellite service that is used for receiving from requesting party's device (22) comprises the request of reception at the DirecTV satellite programming.
20. head-end unit according to claim 14 (14), wherein, the device at the request of satellite service that is used to receive from requesting party's device comprises receiver, and described receiver configuration is used to receive the request from set-top box.
CN2005800458362A 2005-10-26 2005-10-26 A system and method for grouping program identifiers into multicast groups Expired - Fee Related CN101095353B (en)

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CN101095353B (en) 2011-02-16

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