CN101326826B - Method, system and apparatus for controlling service of network TV - Google Patents

Abstract

The IPTV, especially a method, system and apparatus of IPTV service controlling are provided, for resolving the problem that the user terminal cannot obtain the information of the designated channel in the prior art. In the method, system and apparatus, the terminal side transfers the channel identification information of user designated channel to the network side, designates the channel of request; the network side returns the channel information corresponding to the channel identification information of user designated channel. The terminal side may obtain the designated channel information by using the technical proposals above, and reduce the required storage space of the terminal side for storing the channel information.

Description

The service control method of Web TV, system and device

Technical field

The present invention relates to the IPTV technical field, relate in particular to a kind of service control method, system and device of Web TV.

Background of invention

Internet protocol TV (IPTV, Interrnet Protocol Tele Vision) perhaps claims Web TV again, and the structural representation of its system can be as shown in Figure 1.This system comprises user terminal and network side, and network side comprises session processing module and application processing module, wherein:

The session processing module is used to the user terminal of access network that functions such as calling control, route continue are provided, and it both can route the call to called user terminal, also can route the call to application processing module;

Application processing module is used for the request of process user.

E1 shown in Fig. 1 is the interface of user terminal and session processing module, and E2 is the interface of session processing module and application processing module.

At present, when realizing that IPTV is professional, the user uses the relevant information that needs to obtain channel before the IPTV business, i.e. channel information.Channel information may comprise information such as channel multicast address, port, channel encryption key.The user obtains just can add corresponding multicast group behind the channel information, carries out the reception of different channel program.Certainly, comprise actually that as for channel information which concrete information then can be defined voluntarily by the user, as long as user terminal can be watched program according to channel information.

In the prior art, when the IPTV of user terminal software startup, user terminal can use HTTP (HTTP automatically, Hypertext Transfer Protocol) or file transfer protocol (FTP) (FTP, File Transfer Protocol) obtain the text of channel information from assigned address.Specifically can disposablely obtain the channel information of whole channel identication information correspondences, perhaps obtain the channel information of whole channel identication information correspondences several times, in the request of terminal, do not spell out the channel of being asked, but specify filename that comprises descriptor or the script file name of handling request, as:

http://iptv.example.com/ch/ch-des.txt

Expression visit specified channel tabulation description document provides channel information in this document.

Perhaps

http://epg.example.com/epg/jsp/getChannelList.jsp？lang＝en

After script is specified in expression visit, its return information be exactly channel information.

The channel information coding and the form that adopt said method to obtain are generally defined by the developer of Application and Development, belong to privately owned definition; The channel information of Huo Deing is resolved by terminal software and relevant information is kept at end side in end side in this way, the user can carry out channel selection by terminal interface, and terminal is then initiated multicast according to user's selection situation automatically according to the information that is obtained and joined request.

Clearly, when adopting said method, if the user only selects several channels to watch behind starting up of terminal at every turn, then disposable all channel informations that issue have proposed the demand of memory space for terminal, and this is a kind of apparent in view wasting of resources for the less terminal of memory spaces such as mobile phone.Therefore, only to obtain the channel of user's appointment be very significant to user terminal.

Summary of the invention

The embodiment of the invention provides a kind of service control method of Web TV, exists user terminal can't obtain the problem of specified channel information in order to solve in the prior art.

At above-mentioned purpose, the technical scheme that the embodiment of the invention proposes is:

A kind of service control method of Web TV may further comprise the steps:

End side sends the channel identication information of user's specified channel to network side, and receives the channel information that network side returns described identification information correspondence; The method that wherein said end side sends channel identication information is: described end side is carried at channel identication information in the business request information and sends; The method of described end side receiving channels information is: described end side is receiving channels information from the service request response message that network side returns.

The embodiment of the invention also proposes to provide in a kind of SIP network the method for television services, can identify television channel in the SIP network, thereby television services is provided.

At above-mentioned purpose, the technical scheme that the embodiment of the invention proposes is:

The method of television services is provided in a kind of SIP network, and this method comprises:

The Web TV application server receives the SIP conversation request of being initiated by the network TV terminal function, comprises the SIPURI of indication channel identication information in described SIP conversation request;

The described SIP URI of Web TV application server parses to be obtaining described channel identication information, and determines the television channel play to the network TV terminal function according to this channel information.

The embodiment of the invention also proposes to provide in another SIP network the method for television services, can identify television channel in the SIP network, thereby television services is provided.

At above-mentioned purpose, the technical scheme that the embodiment of the invention proposes is:

The method of television services is provided in a kind of SIP network, and this method comprises:

The television channel identification server receives the SIP URI query requests that comprises TV URI from end side, the television channel identification server is according to the corresponding relation of TV URI and SIP URI, to send to end side corresponding to the SIP URI of TV URI, wherein in described SIP URI, comprise channel identication information;

The Web TV application server receives the SIP conversation request of being initiated by end side, comprises described SIP URI in described SIP conversation request;

The described SIP URI of Web TV application server parses to be obtaining described channel identication information, and determines channel information according to this channel identication information.

The embodiment of the invention also proposes to provide in another SIP network the method for television services, can identify television channel in the SIP network, thereby television services is provided.

At above-mentioned purpose, the technical scheme that the embodiment of the invention proposes is:

The method of television services is provided in a kind of SIP network, and this method comprises:

Core IMS receives the SIP conversation request that is sent by end side, comprises TV URI in described SIP conversation request; Core IMS sends SIP URI query requests according to the TV URI that is resolved to the television channel identification server;

The television channel identification server will send to Core IMS corresponding to the SIP URI of TV URI according to the corresponding relation of TV URI and SIP URI, comprise channel identication information in described SIP URI;

Core IMS is routed to the Web TV application server according to the SIP URI that receives with described SIP conversation request, the described SIP URI of Web TV application server parses to be obtaining described channel identication information, and determines the channel information that sends to end side according to this channel identication information.

The embodiment of the invention also provides a kind of network television system, exists user terminal can't obtain the problem of specified channel information in order to solve in the prior art.

At above-mentioned purpose, the technical scheme that present embodiment proposes is:

A kind of network television system comprises end side and network side,

Described end side comprises the module that sends the channel identication information of user's specified channel to network side, and wherein said end side is carried at channel identication information in the business request information and sends;

Described network side comprises module from the channel information of described identification information correspondence to end side that return, and wherein said end side is receiving channels information from the service request response message that network side returns.

The embodiment of the invention also proposes a kind of system that television services is provided in session initiation protocol SIP network, can identify television channel in the SIP network, thereby television services is provided.

At above-mentioned purpose, the technical scheme of the embodiment of the invention is:

A kind of system that television services is provided in session initiation protocol SIP network comprises:

The network TV terminal function is used for initiating the SIP conversation request to the Web TV application server, comprises the SIP unified resource designator URI that indicates channel information in described SIP conversation request;

The Web TV application server is used to resolve described SIP URI obtaining described channel information, and determines the television channel play to the network TV terminal function according to this channel information.

The embodiment of the invention also proposes a kind of network TV terminal function, can identify television channel in the SIP network, thus the television services that realization provides.

At above-mentioned purpose, the scheme that present embodiment proposes is:

A kind of network TV terminal function comprises that the SIP conversation request is initiated the unit and TV information represents the unit, wherein:

The SIP conversation request is initiated the unit, is used for initiating the SIP conversation request to the Web TV application server, comprises the SIP URI that indicates channel information in described SIP conversation request;

TV information represents the unit, is used to receive the television channel information of being determined according to this channel information by the Web TV application server, and represents described television channel information.

The embodiment of the invention also proposes a kind of network TV terminal function, can identify television channel in the SIP network, thus the television services that realization provides.

At above-mentioned purpose, the scheme that present embodiment proposes is:

A kind of network TV terminal function comprises that the SIP conversation request is initiated the unit and TV information represents the unit, wherein:

The SIP conversation request is initiated the unit, be used for sending the SIP URI query requests that comprises TVURI to the television channel identification server, the SIP URI that reception is returned by the television channel identification server corresponding to this TV URI, and initiate to comprise the SIP conversation request of SIP URI to the Web TV application server, in described SIP URI, comprise channel information;

TV information represents the unit, is used to receive the television channel information of being determined according to this channel information by the Web TV application server, and represents described television channel information.

The embodiment of the invention also provides a kind of Web TV application server, can be according to the channel identication information in the SIP network, thus the television services that provides is provided.

At above-mentioned purpose, the scheme that present embodiment proposes is:

A kind of Web TV application server comprises that channel information acquiring unit and TV information provide the unit, wherein:

The channel information acquiring unit is used to receive the SIP conversation request, and resolves described SIP URI to obtain described channel information, wherein at the described SIP URI that indicates channel information that comprises in the SIP conversation request;

TV information provides the unit, is used for according to the definite television channel of playing to the network TV terminal function of this channel information, and sends described television channel information to described network TV terminal function.

The embodiment of the invention also proposes a kind of television channel identification server, and its technical scheme is:

A kind of television channel identification server comprises corresponding relation preservation unit and SIP URI query unit, wherein

Corresponding relation is preserved the unit, preserves the corresponding relation of TV URI and SIP URI;

SIP URI query unit, be used to receive the SIP URI query requests that comprises TV URI that network TV terminal function or Core IMS are sent, and, will send to described network TV terminal function or Core IMS corresponding to the SIP URI of this TV URI according to the corresponding relation of TV URI and SIP URI.

The embodiment of the invention also proposes a kind of Core IMS, comprises TV URI resolution unit and routing unit, wherein

TV URI resolution unit is used for receiving the SIP conversation request that includes TV URI from the network TV terminal function, parses TV URI from described SIP conversation request, and sends SIP URI query requests to the television channel identification server;

Routing unit is used for described SIP conversation request is routed to the Web TV application server, wherein comprises the SIP URI that is returned in response to described SIPURI query requests by the television channel identification server in described SIP conversation request.

The embodiment of the invention also proposes a kind of terminal, comprise the command reception module that is used to receive user's operational order, described terminal also comprises the module of the channel identication information that sends described command reception module specified channel, wherein channel identication information is carried in the business request information to send.

In embodiments of the present invention, end side is specified the channel of being asked to the channel identication information of network side transmission user specified channel; Network side returns the channel information of the channel identication information correspondence of user's specified channel to end side.Adopt technical solution of the present invention, end side can be obtained the channel information of the channel of its appointment, the channel that makes the user specify its needs to obtain according to its needs; And, need obtain all channel informations of network side with respect to end side in the prior art, significantly, adopt technical solution of the present invention to save the required memory space of end side storage of channel information, this is very significant for the less terminal of memory spaces such as mobile phone.

In addition, the network TV terminal function comprises the SIP URI that indicates channel information in the SIP conversation request that Core IMS sends; Core IMS sends SIP URI query requests according to the TV URI that is resolved to the television channel identification server, and the television channel identification server can be determined television channel according to channel information.As seen, channel identication of the present invention carries channel information based on SIP URI mechanism in SIP URI, therefore can identify television channel uniquely in the SIP network, can be implemented in the SIP network television services is provided.

Brief Description Of Drawings

Fig. 1 is an IPTV system block diagram of the prior art;

Fig. 2 be according to the present invention in the preferred embodiment user terminal obtain the flow chart of channel information from application processing module;

Fig. 3 is for providing the method flow schematic diagram of television services in the SIP network according to the embodiment of the invention;

Fig. 4 for according in the SIP network of the embodiment of the invention request watch default live or the time mobile television channel schematic flow sheet;

Fig. 5 is for watching the schematic flow sheet of specific channel according to request in the SIP network of the embodiment of the invention;

Fig. 6 is for watching the schematic flow sheet of specific channel-group according to request in the SIP network of the embodiment of the invention;

Fig. 7 is the IPTV system block diagram in the embodiment of the invention;

Fig. 8 is for providing the system configuration schematic diagram of television services in the SIP network according to the embodiment of the invention;

The system configuration schematic diagram of television services is provided in the SIP network of Fig. 9 for the preferred embodiment according to the present invention;

Figure 10 is the network TV terminal structural representation according to the embodiment of the invention;

Figure 11 is the Web TV application server structural representation according to the embodiment of the invention;

Figure 12 is the television channel identification server structural representation according to the embodiment of the invention;

Figure 13 is the Core IMS structural representation according to the embodiment of the invention.

Implement mode of the present invention

Core concept of the present invention is: end side sends the channel identication information of user's specified channel to network side; Network side returns the channel information of the channel identication information correspondence of user's specified channel to end side.

Below in conjunction with drawings and Examples the present invention is further described.

In the present embodiment, the interface E1 of user terminal and session processing module and the interface E2 of session processing module and application processing module can be Session initiation Protocol (SIP, Session InitialProtocol), HTTP, transmit the interface of stream media protocol (RTSP, Real-Time StreamingProtocol) in real time.

In order to realize the IPTV business, user terminal need obtain necessary channel information from application processing module.In one embodiment of the invention, the flow process that user terminal obtains channel information from application processing module may further comprise the steps as shown in Figure 2:

Step S101, user terminal send the channel identication information of specified channel to the session processing module.

Here, channel identication information can be the channel identication of determining, also can be the pairing numbering of channel identication or other information of determining.Such as: CCTV1 is a channel identication, and 111 be the numbering of this channel identication correspondence, and so, the channel identication information among the step S101 both can be CCTV1, also can be 111.

Step S102, session processing module route or transmit this channel identication information to application processing module.

After step S103, application processing module receive this channel identication information, obtain its corresponding channel information, and return channel identication information and corresponding channel information thereof to the session processing module according to this channel identication information;

Step S104, the channel information of session processing module route or forwarding channel identication information and correspondence thereof is to user terminal.

In above-mentioned flow process, user terminal can obtain the channel information of specified channel by above-mentioned flow process when initiating service request.That is to say, can utilize business request information to carry the channel identication information of specified channel, utilize the service request response message to carry channel identication information and corresponding channel information thereof.

Business request information can be carried one or more channel identication information.Carry in business request information under the situation of a channel identication information, the service request response message that application processing module returns can not comprise this channel identication information, and only comprises the channel information of this channel identication information correspondence.Like this, user terminal is after receiving this channel information, and clearly this channel information is the channel information of the specified channel of user terminal.And in business request information, carry under the situation of a plurality of channel identication information, in the service request response message, can carry one or more groups channel identication information and channel information, thereby support, the realization of many pictures broadcast etc. as picture-in-picture.

Channel information can be carried in the service request response message and return to user terminal, such as being carried in the existing Session Description Protocol (SDP, Session Description Protocol).And return in this process of channel information at user terminal requests channel information, network; Perhaps, further, switch, in the process that the user terminal requests channel switches, in business request information and service request response message, all may need to carry channel identication information if the user need carry out channel.Present embodiment provides following several method to realize the transmission of channel identication information:

Method one, the attribute of expansion SDP defines a new SDP property column, and carries channel identication information by the SDP property column of this redetermination.

That adopt as the interface E2 of the interface E1 of user terminal and session processing module and session processing module and application processing module is SIP, and RTSP when HTTP etc. can carry the agreement of SDP, can carry channel identication information by the SDP property column of redetermination.

In an example of present embodiment, adopt following language to define a new SDP property column:

A=chid: channel identication information

In a concrete service request response message, use this new SDP property column to carry channel identication information and also simultaneously carry channel information and other information at other property columns, describing mode A is as follows:

v＝0

o＝ue?2890844730?2890844732?IN?IP4?client.example.com

c＝IN?IP4?client.example.com

m＝audio?65421RTP/AVP?0

a＝rtpmap:0PCMU/8000

a＝chid:TV1

m＝video?65113RTP/AVP?31

a＝rtpmap:31MPV/90000

a＝chid:TV1

Above-mentioned language the 6th specified channel attribute that worked is limited the media audio of the 4th, 5 line descriptions, the 9th specified channel attribute that worked is limited the media video of the 7th, 8 line descriptions, the media audio of expression as the 4th row, the 5th row is relevant with TV1, and the media video of the 7th row, eighth row is also relevant with the TV1 channel.The 4th row described here, the 5th row, the 7th row, eighth row etc. just can be thought the channel information that network side returns.Certainly, also can adopt describing mode A to carry channel information in the business request information, just not carry channel information and get final product.

The service request response message can also adopt describing mode B, and is specific as follows:

v＝0

o＝ue?2890844730?2890844732?IN?IP4?client.example.com

c＝IN?IP4?client.example.com

a＝chid:TV1

m＝audio?65421?RTP/AVP?0

a＝rtpmap:0PCMU/8000

m＝video?65113RTP/AVP?31

a＝rtpmap:31MPV/90000

Above-mentioned language the 4th specified session level channel attribute that worked is limited the Voice ﹠ Video of medium, represents that the 5th row～eighth row property column is relevant with the TV1 channel.Equally, the 5th row～eighth row described here etc. also can be thought the channel information that network side returns.Certainly, also can adopt describing mode B to carry channel information in the business request information, just not carry channel information and get final product.

Realizing IPTV class business, as LiveTV,, when TsTV etc. is professional, terminal is at SIP, RTSP carries the SDP that comprises this attribute expansion the request channel is identified in the business request information of agreements such as HTTP; Application processing module carries the channel that the SDP that comprises the expansion of this attribute asks terminal equally and identifies in the service request response message, simultaneously, also the channel information of channel identication information correspondence is described, thereby in conjunction with the channel information of SDP media description a channel is carried out complete description by channel identication information by SDP.

Because SDP can be carried in the agreements such as SIP, RTSP, HTTP, so method one is not limited to a certain specific protocol use.

Because in a session, the property column of SDP can only increase or revise, when therefore employing method one is carried out carrying of channel identication information, if requiring to carry out channel in watching the process of a certain channel, the user switches, then can send a business request information to application processing module, and, realize that channel switches by increasing or revising the SDP that carries in this service request and notify application processing module, describe below two kinds and realize channel switching way:

Mode one, user terminal add the capable target channel of indicating of channel identication information attribute of target channel in the SDP that business request information is carried, and indicate that in SDP the channel that is switched closes, the SDP media receiving end mouth of the channel correspondence that is switched as setting is 0 to indicate that it closes; Application processing module newly-increased SDP property column in the SDP that this business request information corresponding business request response is carried is described the channel information of target channel.

With above-mentioned describing mode A is example, and when the user will be with channel when TV1 switches to TV2, the specific descriptions of SDP that user terminal sends to application processing module are as follows:

v＝0

o＝ue?2890844730?2890844732?IN?IP4client.example.com

c＝IN?IP4?client.example.com

m＝audio?0?RTP/AVP?0

a＝rtpmap:0PCMU/8000

a＝chid:TV1

m＝video?0RTP/AVP?31

a＝rtpmap:31MPV/90000

a＝chid:TV1

m＝audio?40001RTP/AVP?0

a＝rtpmap:0PCMU/8000

a＝chid:TV2

m＝video?40005RTP/AVP?31

a＝rtpmap:31MPV/90000

a＝chid:TV2

It is as follows that application processing module returns to user terminal SDP:

v＝0

o＝ue?2890844730?2890844732IN?IP4?client.example.com

m＝audio?0RTP/AVP?0

c＝IN?IP4?TV1.example.com

a＝rtpmap:0PCMU/8000

a＝chid:TV1

m＝video?0?RTP/AVP?31

c＝IN?IP4?TV1.example.com

a＝rtpmap:31MPV/90000

a＝chid:TV1

m＝audio?65425?RTP/AVP?0

c＝IN?IP4TV2.example.com

a＝rtpmap:0PCMU/8000

a＝chid:TV2

m＝video?65115RTP/AVP?31

c＝IN?IP4TV2.example.com

a＝rtpmap:31MPV/90000

a＝chid:TV2

Realize under the situation of channel switching in employing mode one, the situation that the target channel that may exist the user to switch has been described in SDP, for example, after channel is switched to TV2 from TV1, again channel is switched back TV1 from TV2, then user terminal can directly be revised as above-mentioned SDP:

v＝0

o＝ue?2890844730?2890844732INIP4client.example.com

c＝IN?IP4client.example.com

m＝audio?65421RTP/AVP?0

a＝rtpmap:0PCMU/8000

a＝chid:TV1

m＝video?65113?RTP/AVP?31

a＝rtpmap:31MPV/90000

a＝chid:TV1

m＝audio?0RTP/AVP?0

a＝rtpmap:0PCMU/8000

a＝chid:TV2

m＝video?0RTP/AVP?31

a＝rtpmap:31MPV/90000

a＝chid:TV2

And this SDP sent to application processing module, then application processing module can send the content of TV1 and stop to send the content of TV2 to user terminal according to the description of this SDP, realizes the switching of channel.

Mode two, user terminal are by the capable modification of indicating channel of existing channel identication information attribute among the SDP that revises business request information and carry, indicate that as can in business request information, existing a=chid:TV 1 being revised as a=chid:TV 2 hope switches to TV2 from TV1, application processing module is revised the capable correspondence of channel identication information attribute in the SDP that the service request response message carries channel information property column is indicated the channel information of target channel, is revised as the channel information of TV2 as the channel information with TV 1.

Be example still with above-mentioned describing mode A, when the user will specifically describe as follows with channel when TV1 switches to TV2:

v＝0

o＝ue?2890844730?2890844732IN?IP4client.example.com

c＝IN?IP4?client.example.com

m＝audio?65421?RTP/AVP?0

a＝rtpmap:0PCMU/8000

a＝chid:TV2

m＝video?65113RTP/AVP?31

a＝rtpmap:31MPV/90000

a＝chid:TV2

Realize under the situation of channel switching in employing mode two, the also target channel that may exist the user to switch situation about in SDP, being described, for example, user terminal is when asking channel identication information for the first time, asked the channel identication information of TV1 and TV2, closed TV2 afterwards, promptly only remaining TV1 carries out the switching of TV1 to TV2 then again.At this moment, user terminal only need according to circumstances be revised SDP and send to application processing module, and then application processing module can send the content of TV2 and stop to send the content of TV1 to user terminal according to the description of this SDP, realizes the switching of channel.

When receiving the program of a plurality of channels at the same time, if the user wishes to close specified channel, then terminal can be closed by indicating specified channel among the SDP that carries in business request information, as the SDP media receiving end mouth that the specified channel correspondence is set is 0 to indicate that it closes.Application processing module stops to send to user terminal the content of specified channel after receiving this business request information, thereby realizes closing of specified channel.

Method two defines new SIP header field, and carries channel identication information by the SIP header field of this redetermination;

When the interface E2 of the interface E1 of user terminal and session processing module and session processing module and application processing module adopts Session Initiation Protocol to realize, can define new SIP header field, and carry channel identication information by the SIP header field of this redetermination.

In an example of present embodiment, adopt the following SIP header field of BNF grammer redetermination:

Channel ＝″Channel″HCOLON 1*(chId)*(SEMI?chid_parm)

chId ＝[″chId″EQUAL]ch-value

ch-value ＝token?/quoted-string

chid_parm ＝generic-param

Realizing IPTV class business, during as business such as LiveTV, TsTV, terminal identifies the request channel by carry this header field in the business request information that adopts Session Initiation Protocol; Carry this header field equally in the service request response message of application processing module, and also simultaneously carry SDP in SIP in this service request response message channel information is described, both are in conjunction with a channel is carried out complete description.

When the SIP header field that specifically uses this redetermination in business request information and service request response message carries channel identication information, can adopt following form:

Channel:chId＝cctv1

Perhaps

Channel:cctv1

Perhaps

Channel:“ccty1”

Above-mentioned various forms may be used to the indicating services request message or the service request response message relevant with channel ccty1.

In the service request response message, the SIP header field of redetermination can be used with the SDP that attribute in the method one has been expanded in the method two, also can with the SDP of non-expansion, do not have the capable SDP of extended attribute to be used before promptly, wherein:

When the SDP of the SIP of redetermination in method two header field and non-expansion is used, user terminal is after receiving this service request response message, and whole media description contents that the SDP of this non-expansion is included are all as the indicated relevant media description content of channel of this SIP header field;

When the SDP that has expanded when attribute in the SIP of redetermination in method two header field and the method one is used, user terminal is after receiving this service request response message, channel identication information that the SIP header field is included and the included media description content of SDP are mated, the capable pairing channel information of extended attribute that is complementary with the included channel identication information of SIP header field among the SDP channel information that is appointment then, other descriptor can be independent of channel information and exist.In this case, user terminal need carry out channel when switching, and can not indicate that in SDP the channel that is switched closes, and only need make not comprising in the SIP header field that the channel that is switched or the identification information of pent channel get final product.That is to say that if end side needs channel to switch, end side sends to network side with business request information, the SIP header field of new expansion does not comprise the channel identication information that is switched channel in the business request information; Network side mates the parameter of new expansion in the SIP header field of the SDP property column of the redetermination in the message that receives and described new expansion or the SIP header field, and the channel identication information that will be complementary is as the channel identication information of the switching target channel of user's appointment.

With the channel identication information of carrying in the SIP header field is TV2, and being described below among the SDP that SIP carries describes:

v＝0

o＝ue?2890844730?2890844732?IN?IP4?client.example.com

c＝IN?IP4client.example.com

m＝audio?65422RTP/AVP?0

a＝rtpmap:0PCMU/8000

a＝chid:TV1

m＝video?65113RTP/AVP?31

a＝rtpmap:32MPV/90000

a＝chid:TV1

m＝audio?65425RTP/AVP?0

a＝rtpmap:0PCMU/8000

a＝chid:TV2

m＝video?65115?RTP/AVP31

a＝rtpmap:31MPV/90000

a＝chid:TV2

At this moment, mate according to channel identication information TV2 that carries in the SIP header field and the included media description content of SDP, then the descriptor of TV2 appointment is as can be known:

m＝audio?65425RTP/AVP0

a＝rtpmap:0PCMU/8000

m＝video?65115RTP/AVP?31

a＝rtpmap:31MPV/90000

Method three is carried channel identication information by the parameter in the expansion SIP header field;

When the interface E2 of the interface E1 of user terminal and session processing module and session processing module and application processing module adopts Session Initiation Protocol to realize, can carry channel identication information by the parameter in the expansion SIP header field.

In an example of present embodiment, the general parameter generic-param in the Accept-Contact header field of expansion Session Initiation Protocol carries out channel identication information.

Existing BNF syntactic definition to the generic-param parameter is as follows:

generic-param ＝token[EQUAL?gen-value]

gen-value ＝token?/host?/quoted-string

In this example, according to generic-param parameter grammer, increase the definition of channel identication information in the generic-param parameter, channel identication information can adopt form as follows:

chId＝TV?1，chId＝TV2，...，chId＝TVn

Perhaps

chId＝“TV1”，chId＝“TV2”，...，chId＝“TVn”

Perhaps

TV1，TV2，...，TVn

Perhaps

“TV1”，“TV2”，...，“TVn”

Realizing IPTV class business, during as business such as LiveTV, TsTV, terminal identifies the request channel by the general parameter generic-param that carries in the Accept-Contact header field in the business request information that adopts Session Initiation Protocol; In the service request response message of application processing module, carry the general parameter generic-param in this Accept-Contact header field equally, and also simultaneously carry SDP in SIP in this service request response message channel information is described, both are in conjunction with a channel is carried out complete description.

When specifically in business request information and service request response message, utilizing general parameter generic-param in the Accept-Contact header field to carry channel identication information, can adopt following form:

Accept-Contact:*；chId＝“TV1”

Perhaps

Accept-Contact:*；TV1；

Above-mentioned various forms may be used to the indicating services request message or the service request response message relevant with channel TV1.

In the service request response message, parameter in the SIP header field of having expanded in the method three can be used with the SDP that attribute in the method one has been expanded, also can be used with the SDP of non-expansion, wherein:

When the SDP of parameter of having expanded in the SIP header field in the method three and non-expansion is used, user terminal is after receiving this service request response message, and whole media description contents that the SDP of this non-expansion is included are all as the indicated relevant media description content of channel of the parameter of expanding in this SIP header field;

When the SDP that has expanded when attribute in parameter of having expanded in the SIP header field in the method three and the method one is used, user terminal is after receiving this service request response message, parameter included channel identication information and the included media description content of having expanded in the SIP header field of SDP mated, then among the SDP with the SIP header field in the extended attribute capable pairing channel information that is complementary of the included channel identication information of the parameter the expanded channel information that is appointment, other descriptor can be independent of channel information and exist.Similar with method two, in this case, when user terminal need switch, can not indicate that in SDP the channel that is switched closes, only need make not comprising in the parameter of expanding in the SIP header field that the channel that is switched or the identification information of pent channel get final product.That is to say that if end side needs channel to switch, end side sends to network side with business request information, the parameter of new expansion does not comprise the channel identication information that is switched channel in the business request information SIP header field; Network side mates the parameter of new expansion in the SDP property column of the redetermination in the message that receives and the described SIP header field, and the channel identication information that will be complementary is as the channel identication information of the switching target channel of user's appointment.

Method four is carried channel identication information by message body;

That adopt as the interface E2 of the interface E1 of user terminal and session processing module and session processing module and application processing module is SIP, RTSP, during agreements such as HTTP, in business request information and service request response message thereof, can pass through SIP, RTSP, message bodies such as HTTP are carried channel identication information, message body can be adopted text mode, XML (eXtensible MarkupLanguage, expansion identifiable language) coded system or other coded system.

In an example of present embodiment, in business request information and service request response message thereof, adopt XML Schema (pattern) definition channel identication information, provide wherein a kind of language of concrete definition channel identication information below, when concrete definition, may have multiple variation:

<？xml?version＝″1.0″encoding＝″UTF-8″？>

<xs:schema?targetNamespace＝″urn:ietf:params:xml:ns:chid″

xmlns＝″urn:ietf:params:xml:ns:chid″

xmlns:xs＝″http://www.w3.org/2001/XMLSchema″

elementFormDefault＝″qualified″>

<xs:element?name＝″chidlist″>

<xs:complexType>

<xs:sequence>

<xs:element?name＝″chid″

minOccurs＝″1″maxOccurs＝″unbounded″/>

<xs:attribute?name＝″id″type＝″xs:string″use＝″required″/>

</xs:sequence>

</xs:complexType>

</xs:scnema>

Realizing IPTV class business, during as business such as LiveTV, TsTV, terminal is by adopting SIP, and RTSP passes through text mode in the message body of the business request information of agreements such as HTTP, and XML coded system or other coded system identify the request channel; Similarly, in the message body of the service request response message of application processing module, pass through text mode, XML coded system or other coded system identify the request channel, and go back simultaneously in this service request response message at SIP, RTSP, carry SDP among the HTTP etc. channel information is described, both are in conjunction with a channel is carried out complete description.

Below providing one adopts the XML coded system to carry the example of channel identication information at the sip message body.The body (Body) of XML coding uses above-mentioned definition rule, and the indicating services request is relevant with the TV1 channel.

<？xml?version＝″1.0″encoding＝″UTF-8″？>

<chidlist?xmlns＝″urn:ietf:params:xml:ns:chid″

xmlns:xsi＝″http://www.w3.org/2001/XMLSchema-instance″>

<chid?id＝TV1/>

</chidlist>

In the service request response message, the message body of carrying channel identication information in the method four can be used with the SDP that attribute in the method one has been expanded, also can be used with the SDP of non-expansion, wherein:

When the SDP of message body of carrying channel identication information in the method four and non-expansion is used, user terminal is after receiving this service request response message, and whole media description contents that the SDP of this non-expansion is included are all as the indicated relevant media description content of channel of this message body;

When the SDP that has expanded when attribute in message body of carrying channel identication information in the method four and the method one is used, user terminal is after receiving this service request response message, channel identication information that message body is included and the included media description content of SDP are mated, the capable pairing channel information of extended attribute that is complementary with the included channel identication information of message body among the SDP channel information that is appointment then, other descriptor can be independent of channel information and exist.Similar with method two, in this case, when user terminal need switch, can not indicate that in SDP the channel that is switched closes, only need make not comprising in the message body that the channel that is switched or the identification information of pent channel get final product.

Method five, the incident bag by sip message carries channel identication information.

When the interface E2 of the interface E1 of user terminal and session processing module and session processing module and application processing module adopts Session Initiation Protocol to realize, can in the incident bag of sip message, define a channel descriptor incident bag, and carry channel identication information by this incident bag.

In an example of present embodiment, channel descriptor incident bag of definition in the incident bag of sip message, called after incident bag type is " channel information ", and carry channel identication information and/or multicast address and port, and/or other channel parameters by the parameter of incident bag.

Realizing IPTV class business, during as business such as LiveTV, TsTV, terminal can be by identifying the request channel in subscribing to (subscribe) request, and the request network side sends the channel information of specified channel in notice (notify) mode; Return specific channel information for the indication network side in this request, wherein need to carry by channel identication information chId and carry out the filtercondition that the incident package informatin filters, this can strengthen by existing filtercondition indication technology or to it and is satisfied.Application processing module then responds user's request in notice (notify) mode, carries this incident bag therein the channel that the user asked is described, and comprises clear and definite channel indication in the events corresponding bag.

When adopting this method to realize the transmission of channel identication information, when user terminal need be closed channel, identify by the channel of in quitting the subscription of (unsubscribe) request, needs being closed and to close corresponding channel; When user terminal needs switching channels, close the channel that is switched by in the request of quitting the subscription of, the channel that is switched being identified, and in subscribe request, the switching target channel is identified the switching that realizes channel.

In summary, when adopting Session Initiation Protocol, use INVITE, reInvite, INFO, SUBSCRIBER, NOTIFY, MES SAGE, ACK (Acknowledgement, confirm to reply) wait and in business procedure, carry out professional change or carry out the transmission of average information, can adopt said method one to method four to carry out channel identication information, carrying out service request with employing INVITE is example, in INVITE, carry channel identication information, and the service request response message can be 183 intermediate response to INVITE, also can be 200Ok, but wherein all carries channel identication information and corresponding channel information thereof.

And service request also can adopt RTSP or http protocol, when adopting RTSP or http protocol, that can use description (DESCRIBE) message of RTSP or HTTP obtains (GET) message to application processing module request channel information, can adopt said method one or method four to carry out channel identication information in the GET of the DESCRIBE of RTSP message or HTTP message.Application processing module then can as returning channel information and channel identication information to the user among the 200ok, wherein can adopt said method one or method four to carry out channel identication information in RTSP or http response message equally.

Method six is carried channel identication information by SIP unified resource designator (URI).

In the practical application, can in SIP URI, comprise indication channel identication information by expansion URI parameter or user type.Indication channel identication information can comprise: information such as member's channel information of the title of channel/channel-group and/or channel number, channel type, channel-group and service provider.

Such as, can increase a URI parameter newly, such as " tv ", and this URI parametric form that increases newly do not limit, and being used to identify this SIP URI is the television channel sign, parameter format (1):

Form (1): sip:user@host:port; Tv;

Perhaps, also can increase a user type newly, by the user type, the SIP entity can be determined the broadcast television channel that the network TV terminal function is just being asked, parameter format (2):

Form (2): sip:user@host:port; User=tv.

Based on the form of above-mentioned definition, can adopt no channel information to represent default channel, promptly determine specific channel by network.The channel that the Web TV application server 102 that the TV business is provided decides the user to ask according to local policy or user related data.

Definite method of default channel is including but not limited to following mode:

A, the default channel that adopts Web TV application server 102 or main channel (being TV service provider's main channel) are as default channel;

The startup channel that channel that the user of B, employing record last time watched or user are provided with (being that the each start of user all begins to watch from this channel) is as default channel.

Based on above-mentioned form (1) and form (2), the sign of default channel is exemplified below:

Sip:wqed.org; Tv or

sip:wqed.org；user＝tv

Based on (1) and the form (2) of above-mentioned definition, the identification method of specific channel or channel-group can be as follows:

The specific channel identification information that is comprised among the SIP URI can comprise specific channel designation or specific channel number, specific channel group name claims or specific channel group #.May be including but not limited to following several situations:

(1), comprises specific channel identification information (containing specific channel number and/or specific channel designation);

(2), comprise specific channel identification information (containing specific channel number and/or specific channel designation), the URI parameter comprises the channel-group information of this specific channel ownership;

(3), comprise specific channel group identity information (comprise specific channel group name claims and/or specific channel group #).

Such as: the channel number that Web TV application server 102 provides is 1023 television channel or channel-group, is exemplified below::

Sip:1023@wqed.org; Tv or

sip:1023@wqed.org；user＝tv

Though more than specifically described the mode that identifies television channel by expansion URI parameter and user type, can also carry other parameters of channel by expanding other URI parameter.Other parameters of described channel wait other parameter including but not limited to service provider's information, channel type (as direct broadcast band or time shift channel) and channel attribute (as whether supporting the TrickMode attribute).The method of using user partly to describe default channel, specific channel and channel-group can have a lot, and the embodiment of the invention is not done any restriction to specific implementation method.

Such as: identify certain channel and whether have " whether supporting the TrickMode operation " attribute, identification method is exemplified below:

Sip:1023@wqed.org; Tv; TrickMode; Or

sip:1023@wqed.org；user＝tv；trickMode

In the current television system, often adopt the channel identication method of TV URI form, in the electronic program list (EPG) or the Web page, comprise the television channel (direct broadcast band or time shift channel) of TV URI sign based on the IP the Internet.

In the TV URI mechanism based on the RFC2838 definition, " broadcast " part is the identifier of DNS domain name type, does not have routing function.When tv URI was default channel descriptor format, the SIPURI of the sign TV channel after the conversion did not comprise channel information.Be exemplified below:

Tv URI is:＜tv:wqed.org〉(describing the WQED television channel)

Transforming back SIP URI is:

SIP URI:＜sip:wqed.org@example.com; User=tv; Or

<sip: wqed.org@example.com；tv；>

Perhaps, in the SIP signaling, directly use tv URI.When ITF initiates the SIP session, in the Request-URI/To header field, directly comprise TV URI.After Core IMS receives the SIP conversation request, to the SIPURI of television channel identification server inquiry TV URI corresponding identification television channel, then IMS Core according to SIP URI route SIP signaling to the IPTVAS that television services is provided.

In addition, can also adopt existing header field of Session Initiation Protocol or header field parameter (or expansion header field or header field parameter) to carry default (or current) channel identication information.Also can adopt the mode of XML message to carry channel-group and information about firms, as define a kind of content type:

Content-Type:application/tv-package-list

XML message body is exemplified as:

<package?package-id＝”sip:package1@tvserver.com”；

<entry?channel＝”sip:channel1@tvserver.com”/>

<entry?channel＝”sip:channel2@tvserver.com”/>

</package>

Carry the scheme of channel identication information at method six, suppose that user terminal is that (IPTV Terminal Function, ITF), the application processing module of network side is Web TV application server (IPTVAS) to the network TV terminal function.In this case, further be described in detail with several preferred embodiments below.

Fig. 3 is for providing the method flow schematic diagram of television services in the SIP network according to the embodiment of the invention.As shown in Figure 3, this method comprises:

Step 301: the network TV terminal function is initiated the SIP conversation request to the Web TV application server, comprises the SIP URI of indication channel identication information in described SIP conversation request;

Step 302: the described SIP URI of Web TV application server parses to be obtaining described channel identication information, and determines the television channel play to the network TV terminal function according to this channel identication information.

Definite television channel described here is exactly to have determined channel information in fact.Certainly, after the Web TV application server has been determined channel information, channel information can also be returned to the network TV terminal function.

Based on above-mentioned flow process, in a kind of specific implementation, the network TV terminal function sends SIP URI query requests to the television channel identification server, the television channel identification server is according to the corresponding relation of TV URI and SIP URI, to send to the network TV terminal function corresponding to the SIP URI of TV URI, wherein in described SIP URI, comprise channel identication information; The network TV terminal function is initiated the SIP conversation request to the Web TV application server then, comprises described SIP URI in described SIP conversation request; The described SIPURI of Web TV application server parses to be obtaining described channel identication information, and determines the television channel play to the network TV terminal function according to this channel identication information.

In another specific implementation, the network TV terminal function sends the SIP conversation request to Core IMS, comprises TV URI in described SIP conversation request; Core IMS sends SIP URI query requests according to the TV URI that is resolved to the television channel identification server; The television channel identification server will send to Core IMS corresponding to the SIP URI of TV URI according to the corresponding relation of TV URI and SIP URI; Core IMS is routed to the Web TV application server according to the SIP URI that receives with described SIP conversation request, the described SIP URI of Web TV application server parses to be obtaining described channel identication information, and determines the television channel play to the network TV terminal function according to this channel identication information.

Fig. 4 for according in the SIP network of the embodiment of the invention request watch default live or the time mobile television channel schematic flow sheet.

As shown in Figure 4, this method comprises:

Step 401: network TV terminal sends the INVITE request to Core IMS entity, and Request-URI is the SIP URI information of IPTV application server entity that the TV business is provided, and parameter User is for " tv " type or comprise " tv " parameter.

Core IMS entity described here is exactly the session processing module.

Step 402:Core IMS entity is routed to the IPTV application server according to the routing rule of existing Session Initiation Protocol with the INVITE request.

Step 403:IPTV application server is received INVITE request back parsing Request-URI, be judged as the conversation request of default channel identication, service authorization is by (200OK message), the IPTV application server is determined the current channel of watching of user according to local policy and/or user data then, and returns the channel-group information of the media description information (SDP offer) of this current channel, default channel information, default channel correspondence and the relevant information of other member's channels to the user.

Step 404:Core IMS is forwarded to network TV terminal with the response message of IPTV application server.

Step 405: after network TV terminal is received response message, preserve the information that comprises in the response message, and reply (SDPAnswer) message to the media description that Core IMS returns current channel according to terminal capability.

The media description response message of step 406:Core IMS transmission network television terminal is to the IPTV application server.

Step 407: network TV terminal sends to the multicast control point according to the media negotiation result and adds the report of multicast group.

Step 408: the multicast control point sends the multicast Media Stream to network TV terminal.

Fig. 5 is for watching the schematic flow sheet of specific channel according to request in the SIP network of the embodiment of the invention.As shown in Figure 5, this method comprises:

Step 501: the network TV terminal entity sends INVITE and asks Core IMS entity, Request-URI is the SIP URI information of IPTV application server entity that the TV business is provided, parameter User is for " tv " type or comprise " tv " parameter, partly comprise concrete specific channel information at User, as specific channel coding or channel designation.

Step 502:Core IMS entity is routed to the IPTV application server according to the routing rule of existing Session Initiation Protocol with the INVITE request.

Step 503:IPTV application server is resolved Request-URI after receiving the INVITE request, is judged as the conversation request of specific channel identication, and service authorization passes through, and the IPTV application server is determined the current channel of watching of user then.The IPTV application server returns the channel-group identification information of the media description information (SDP offer) of current channel, specific channel identification information, specific channel correspondence and the relevant information of other member's channels to the user.

Step 504:Core IMS transmits the response message of IPTV application server to network TV terminal.

Step 505: after network TV terminal is received response, preserve the information that comprises in the response, and return to the media description of Core IMS current channel according to terminal capability and to reply (SDP Answer) message.

The media description response message of step 506:Core IMS transmission network television terminal is to the IPTV application server.

Fig. 6 is for watching the schematic flow sheet of specific channel-group according to request in the SIP network of the embodiment of the invention.

As shown in Figure 6, this method flow comprises:

Step 601: the network TV terminal entity sends INVITE and asks Core IMS entity, Request-URI is the SIP URI information of IPTV application server entity that the TV business is provided, parameter User is for " tv " type or comprise " tv " parameter, partly comprise specific channel group identity information at User, as specific channel group coding or channel-group title;

Step 602:Core IMS entity is routed to the IPTV application server according to the routing rule of existing Session Initiation Protocol with the INVITE request.

Step 603:IPTV application server is resolved Request-URI after receiving the INVITE request, is judged as the conversation request of specific channel group id, and service authorization passes through, and the IPTV application server is determined the current channel-group of watching of user then.The IPTV application server can adopt in the following manner any to determine current channel: adopt that default channel is a current channel in the channel-group of Web TV application server setting; Or the interior channel of this channel-group that adopts the user last time to watch is a current channel; Or the interior default channel of the channel-group that adopts the user to be provided with is a current channel.The IPTV application server returns the relevant information of the media description information (SDP offer) of current channel, specific channel-group information and other member's channels to the user.

Another kind of optional mode is the television channel that the uncertain user of IPTV application server initially watches, and is selected the television channel of initially watching according to member's channel information by the user.

Step 604:Core IMS transmits the response message of IPTV application server to network TV terminal.

Step 605: after network TV terminal is received response, preserve the information that comprises in the response, and return to the media description of Core IMS current channel according to terminal capability and to reply (SDP Answer) message.

The media description response message of step 606:Core IMS transmission network television terminal is to the IPTV application server.

Fig. 2～Fig. 6 is the method embodiment of IPTV business.At these methods embodiment, the embodiment of the invention also provides a kind of IPTV system.As shown in Figure 7, the IPTV system can comprise end side and network side, wherein:

End side comprises the module that sends the channel identication information of user's specified channel to network side;

Network side comprises the module of channel information from the channel identication information correspondence of user's specified channel to end side that return.

Wherein, comprise the command reception module that is used to receive user's operational order, also comprise following three modules as the user terminal of end side:

Send the module of the channel identication information of command reception module specified channel;

Send the command reception module and specify the module of the channel identication information of the channel correspondence of closing;

The module of the channel identication information of the switching target channel correspondence of transmission command reception module appointment.

The function of above-mentioned three modules can be to be realized by as shown in Figure 7 control module.Certainly above-mentioned three modules also can be three independently module or other combining forms.

As shown in Figure 7, network side comprises application processing module and session processing module, wherein:

The session processing module is transmitted channel identication information and channel information between end side and application processing module;

Application processing module comprises the receiver module that is used to the information that receives, and also comprises following two modules:

The channel identication information that receives according to receiver module sends the module of the channel information of this identification information correspondence;

The channel identication information of the switching target channel correspondence that receives according to receiver module sends the module of the channel information of corresponding switching target channel.

The function of above-mentioned two modules can be the processing modules implement by as shown in Figure 7.Certainly above-mentioned two modules also can be two independently module or other combining forms.

In the practical application, described user terminal can (IPTV TerminalFunction, ITF), the application processing module of network side can be Web TV application server (IPTV AS) for the network TV terminal function.In this case, this system configuration schematic diagram can be represented with Fig. 8.

As shown in Figure 8, this system comprises network TV terminal function (IPTV TerminalFunction, ITF) 101 and Web TV application server (IPTV AS) 102.

Network TV terminal function 101 is used for initiating the SIP conversation request to Web TV application server 102, comprises the SIP URI that indicates channel information in described SIP conversation request;

Web TV application server 102 is used to resolve described SIP URI obtaining described channel information, and determines the television channel play to network TV terminal function 101 according to this channel information.

Certainly, in Fig. 8, also should comprise the entity that is equivalent to the session processing module, not draw here.If the session processing module is IMS core (Core IMS), and further increases a television channel identification server, the structural representation of this system can be represented with Fig. 9.

As shown in Figure 9, this system comprises IPTV terminal 201, IPTV application server 202, IMS core (Core IMS) 203 and television channel identification server 204.

The IPTV terminal that IPTV terminal 201 is watched television services for the user, it supports Session Initiation Protocol, serves as the sip user device role, asks television services by the route of IMS core 203 to the IPTV application server 202 that television services is provided.

Generally, the user can be provided with IPTV terminal 201, after each start, watches default channel or the last channel of watching automatically.In this case, after user's start, IPTV terminal 201 is initiated the SIP session automatically, comprises the SIP URI of the default channel formula of indication request in the Request-URI header field of the INVITE request of transmission.

When the user watches live television programming (LTV), select specific direct broadcast band or direct broadcast band group and click by electronic program list (EPG), IPTV terminal 201 is initiated the SIP session, comprises the SIP URI of specific channel identication of indication or channel-group sign in the Request-URI header field of the INVITE request of transmission.

After IPTV terminal 201 is received the reliable Temporary Response or success response of initial INVITE request, can add the ip multicast group of current channel correspondence.

In television channel identification server 204, preserve the corresponding relation of TV URI and SIP URI.In conversation procedure, IPTV terminal 201 can by with the Q1 interface of television channel identification server 204 directly to the SIP URI of television channel identification server 204 inquiries with TV URI corresponding identification channel.

The process that IPTV terminal 201 is directly inquired about SIPURI by the Q1 interface specifically comprises: IPTV terminal 201 sends SIP URI query requests to television channel identification server 204, television channel identification server 204 is according to the corresponding relation of TV URI and SIP URI, to send to IPTV terminal 201 corresponding to the SIP URI of TV URI, the route of IPTV terminal 201 by IMS core 203 sends the SIP conversation request that includes the SIP URI that television channel identification server 204 returned to IPTV application server 202 then, IPTV application server 202 is resolved these SIP URI obtaining described channel identication information, and determines the television channel play to IPTV terminal 201 according to this channel identication information.After this, IPTV application server 202 can return to IPTV terminal 201 with the channel information of determining.

Television channel identification server 204 can also by and IMS core 203 between the Q2 interface query interface of TV URI is provided to IMS core 203 or other entities.IMS core 203 provides functions such as signalling route, session control and professional triggering.If IMS core 203 is received the SIP conversation request that comprises TV URI from IPTV terminal 201, then IMS core 203 is inquired about the SIP URI of this TV URI correspondence by the Q2 interface, and the SIP conversation request of IPTV terminal 201 being initiated according to the SIP URI that inquires about acquisition is routed to IPTV application server 202 then.

IPTV application server 202 is for providing the application server of television services, as live television service (LTV) is provided, content service (Content On Demand) etc. is professional as required.IPTV application server 202 is resolved the channel information that carries in the Request-URI header field after receiving the INVITE request.

In SIP network embodiment illustrated in fig. 9, specifically adopt IMS core 203 to come route SIP conversation request to IPTV application server 202.In fact, the present invention is not limited thereto.It will be appreciated by those of skill in the art that so long as in the SIP network, have the entity of SIP conversation request routing function all to be applicable to the present invention, and IPTV terminal 201 can also be passed through the direct and IPTV application server 202 execution interactive functions of Session Initiation Protocol.

If the Request-URI header field does not comprise channel identication information, then think the default channel of IPTV terminal 201 request.IPTV application server 202 is determined the current channel of playing to the user according to local service rule or strategy.After IPTV application server 202 is determined default channel, the media description information (SDP Offer) that in sip response message SDP message body, comprises the channel correspondence, and can in reliable Temporary Response of SIP or success response message, comprise channel-group information, the channel-group sign of this default channel correspondence and the information of other member's channel.

If the Request-URI header field comprises specific channel identification information or channel-group identification information, IPTV application server 202 is resolved channel identication information according to local policy or service logic, determines the specific channel or the channel-group of IPTV terminal 201 requests.If channel-group sign then determines that according to above-mentioned default channel method determines current channel.IPTV application server 202 can comprise media description information, channel-group sign and other member's channel information of current channel in reliable Temporary Response of SIP or success response message.

Use after the embodiment of the invention, channel identication information can identify default television channel, specific TV channel and television channel group in the SIP network.Described SIP network includes but not limited to networks such as NGN/IMS/IMS Based IPTV.

Based on above-mentioned analysis, the embodiment of the invention has also proposed a kind of network TV terminal and Web TV application server.

Figure 10 is the network TV terminal structural representation according to the embodiment of the invention.

As shown in figure 10, this network TV terminal comprises that the SIP conversation request is initiated unit 701 and TV information represents unit 702.Wherein:

The SIP conversation request is initiated unit 701, is used for initiating the SIP conversation request to the Web TV application server, comprises the SIP URI of indication channel identication information in described SIP conversation request;

TV information represents unit 701, is used to receive the television channel information of being determined according to this channel identication information by the Web TV application server, and represents described television channel information.

Alternatively, the SIP conversation request is initiated unit 701, be used for sending the SIP URI query requests that comprises TV URI to the television channel identification server, the SIP URI that reception is returned by the television channel identification server corresponding to this TV URI, and initiate to comprise the SIP conversation request of SIP URI to the Web TV application server, in described SIP URI, comprise channel identication information; At this moment

TV information represents unit 701, is used to receive the television channel information of being determined according to this channel identication information by the Web TV application server, and represents described television channel information.

Figure 11 is the Web TV application server structural representation according to the embodiment of the invention.

As shown in figure 11, this Web TV application server comprises that channel identication information acquisition unit 801 and TV information provide unit 802, wherein:

Channel identication information acquisition unit 801 is used to receive the SIP conversation request of the SIPURI that comprises indication channel identication information, and resolves described SIP URI to obtain described channel identication information;

TV information provides unit 802, is used for according to the definite television channel of playing to the network TV terminal function of this channel identication information, and sends described television channel information to described network TV terminal.

The embodiment of the invention has also proposed a kind of television channel identification server.

Figure 12 is the television channel identification server structural representation according to the embodiment of the invention.As shown in figure 12, the television channel identification server comprises corresponding relation preservation unit 901 and SIP URI query unit 902, wherein

Corresponding relation is preserved unit 901, preserves the corresponding relation of TV URI and SIP URI;

SIP URI query unit 902, be used to receive the SIP URI query requests that comprises TV URI that network TV terminal function or Core IMS are sent, and, will send to described network TV terminal function or Core IMS corresponding to the SIP URI of this TV URI according to the corresponding relation of TV URI and SIP URI.

The embodiment of the invention has also proposed a kind of Core IMS.Figure 10 is the Core IMS structural representation according to the embodiment of the invention.

As shown in figure 13, this Core IMS comprises TV URI resolution unit 1001 and routing unit 1002, wherein

TV URI resolution unit 1001 is used for receiving the SIP conversation request that includes TVURI from the network TV terminal function, parses TV URI from described SIP conversation request, and sends SIP URI query requests to the television channel identification server;

Routing unit 1002 is used for described SIP conversation request is routed to the Web TV application server, wherein comprises the SIP URI that is returned in response to described SIP URI query requests by the television channel identification server in described SIP conversation request.

In sum, because the network TV terminal function comprises the SIP URI of indication channel identication information in the SIP conversation request that application server sends, application server can be determined channel identication information according to this SIP URI, so the channel identication of the embodiment of the invention can identify default television channel, specific TV channel and television channel group in the SIP network.And the channel identication of the embodiment of the invention can identify a television channel or a television channel collection in the SIP network widely uniquely.And the SIP entity can be according to channel identication route SIP signaling to other specific SIP entities.

The present invention simultaneously can also be applied in the following live television service in IMS Based IPTV system:

Sign to live broadcast service in the IMS based IPTV system of TISPAN definition at present adopts the notion of business packet to be described, be the user subscribe to or subscribe to when contracting live broadcast service/signatory is a business packet, also be to initiate request during the request live broadcast service to this business packet, because a business packet can comprise several channels, the user that might IMS based IPTV network side can't know for sure this moment is current or initially want the channel watched, and can't network bandwidth resources be reserved, perhaps the needed Internet resources of channel watched of the network bandwidth resources that might be reserved and user do not match, the result causes or user's bandwidth demand can not satisfy, influence customer experience, perhaps bandwidth reserved is too much, the waste network bandwidth resources.

At the problems referred to above, following several solution can be arranged:

1) user watches live telecast to the IPTV system request, in request message, indicate in the business packet of request, carry concrete television channel information simultaneously, this concrete television channel information can be that the user obtains from service selection functional (SSF), it also can be the channel information of watching when withdrawing from last time of user terminal initial setting or record, or alternate manner obtains, also can be when carrying concrete television channel service identification information, and/or indicate channel-group (being business packet) sign simultaneously, business is set up in the process, the CAMEL-Subscription-Information of the network based business packet of IPTV is authorized user's visit, carry out resource reservation according to entrained concrete channel service identification information, after business was set up successfully, terminal added the television channel of access customer appointment.The described method of Fig. 5 can provide this scene of live television service.

2) user watches live telecast to the IPTV system request, if in request message, do not indicate concrete television channel but comprise channel-group information, or do not indicate concrete channel and television channel group, then determine the television channel that the user initially watches by the IPTV system, determine that mode can be the program preferences that is provided with according to the user in subscription data, or the user who derives according to user's program viewing statistics in earlier stage watches custom etc., determine that a suitable channel watches the initial channel of live broadcast service as the user, initial television channel information carries in the IPTV system in request response then, and/or channel-group information, and/or other member's channel information in the channel-group, and carry out resource reservation according to entrained initial channel information, after business was set up successfully, terminal added initial television channel.The described method of Fig. 4 can provide the live television service scene that does not indicate concrete channel and channel-group information in the request message.The described method of Fig. 6 can provide request message middle finger prescribed channel group but not indicate the live television service scene of concrete channel information.

3) user watches live telecast to the IPTV system request, if only carry television channel group information in the request message, do not indicate concrete television channel, and the IPTV system can't determine the interior television channel of this channel-group that the user initially watches, then the member's channel information in the IPTV notifications terminal channel-group (can be to carry in request response, also can be by other message or mode, as issue chained address of this channel-group etc.), at this moment, set up in the process in business, also can't accurately finish the reservation of Internet resources, the mandate that can only finish service request (can be accepted to join request from user's multicast as bearer network, and obtain the network parameter information of each channel in this channel-group, multicast address, bandwidth demands etc.), terminal selects to add the television channel of initially watching according to the channel-group information about firms that obtains, and this moment, bearer network equipment ECF/EFF was after receiving user's Join message, trigger network (RACS) beginning reserved resource is finished the reservation of this initial channel resource.The described method of Fig. 6 can provide this scene of live television service.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (54)

1. the service control method of a Web TV is characterized in that, may further comprise the steps:

End side sends the channel identication information of user's specified channel to network side, and receives the channel information that network side returns described identification information correspondence; The method that wherein said end side sends channel identication information is: described end side is carried at channel identication information in the business request information and sends; The method of described end side receiving channels information is: described end side is receiving channels information from the service request response message that network side returns.

2. the method for claim 1, it is characterized in that, also comprise the channel identication information that described and described channel information is corresponding in the service request response message that described network side returns, described end side is when the channel information that reception is returned, and this method also further comprises: described end side receives described channel identication information from the service response message of returning.

3. method as claimed in claim 2 is characterized in that, channel identication information and channel information that described service response message is carried are: a group or more channel identication information and channel information.

4. as each described method of claim 1 to 3, it is characterized in that described end side with the method that channel identication information is carried in the business request information is:

Described end side is carried at described channel identication information in the business request information by the Session Description Protocol SDP property column of redetermination.

5. as claim 2 or 3 described methods, it is characterized in that the method that described network side carries channel identication information is:

Described network side is carried at described channel identication information in the service request response message by the Session Description Protocol SDP property column of redetermination.

6. as each described method of claim 1 to 3, it is characterized in that after described end side receiving channels information, if end side need be closed specified channel, then this method further comprises:

Described end side closes the informing network side by indicating described specified channel among the SDP that carries in business request information.

7. as each described method of claim 1 to 3, it is characterized in that after described end side receiving channels information, switch if end side need be carried out channel, this method further comprises:

The channel identication information attribute of described end side by adding the switching target channel among the SDP that carries in business request information is capable indicates the switching target channel, and indicates that the channel that is switched closes;

Described network side newly-increased SDP channel information property column in the SDP that the service request response message carries is described the channel information of described switching target channel.

8. as each described method of claim 1 to 3, it is characterized in that after described end side receiving channels information, switch if end side need be carried out channel, this method further comprises:

Described end side is by revising the capable switching of indicating channel of existing channel identication information attribute among the SDP that carries in business request information;

Described network side is revised the capable correspondence of described channel identication information attribute in the SDP that the service request response message carries channel information property column is indicated the channel information of switching target channel.

9. as each described method of claim 1 to 3, it is characterized in that described end side and network side adopt Session initiation Protocol SIP to carry out alternately, described end side with the method that channel identication information is carried in the business request information is:

Described end side by new expansion the SIP header field or the SIP header field in the parameter of new expansion described channel identication information is carried in the business request information.

10. as claim 2 or 3 described methods, it is characterized in that the method that described network side carries channel identication information is:

Described network side by new expansion the SIP header field or the SIP header field in the parameter of new expansion described channel identication information is carried in the business request information.

11., it is characterized in that after the described end side receiving channels information, if end side needs channel to switch, this method further comprises as each described method of claim 1 to 3:

Described end side sends to network side with business request information, and the parameter of newly expanding in the SIP header field of new expansion or the SIP header field in the described business request information does not comprise the channel identication information that is switched channel;

Described network side mates the parameter of new expansion in the SIP header field of the SDP property column of the redetermination in the message that receives and described new expansion or the SIP header field, and the channel identication information that will be complementary is as the channel identication information of the switching target channel of user's appointment.

12., it is characterized in that described end side with the method that channel identication information is carried in the business request information is as each described method of claim 1 to 3: described end side is carried at described channel identication information in the business request information by message body.

13., it is characterized in that the method that described network side carries channel identication information is as claim 2 or 3 described methods:

Described network side is carried at described channel identication information in the service request response message by message body.

14., it is characterized in that after the described end side receiving channels information, if end side needs channel to switch, this method further comprises as each described method of claim 1 to 3:

Described end side sends to network side with business request information, and message body does not comprise the channel identication information that is switched channel in the described business request information;

Described network side mates the SDP property column and the described message body of redetermination in the message that receives, and the channel identication information that will be complementary is as the channel identication information of the switching target channel of user's appointment.

15., it is characterized in that described end side with the method that channel identication information is carried in the business request information is as each described method of claim 1 to 3:

Described end side is carried at described channel identication information in the business request information by the incident bag of sip message.

16., it is characterized in that the method that described network side carries channel identication information is as claim 2 or 3 described methods:

Described network side is carried at described channel identication information in the service request response message by the incident bag of sip message.

17. method as claimed in claim 15 is characterized in that, after the described end side receiving channels information, if end side need be closed specified channel, this method further comprises:

Described terminal closes the informing network side by indicate described specified channel in the request of quitting the subscription of.

18. method as claimed in claim 15 is characterized in that, after the described end side receiving channels information, switches if end side need be carried out channel, this method further comprises:

Described end side closes the informing network side by indicate the channel that is switched in the request of quitting the subscription of, and indicates that in subscribe request the switching target channel comes the informing network side.

19. the method for claim 1 is characterized in that, described channel information comprises at least: channel multicast address and port.

20. the method for television services is provided in the SIP network, it is characterized in that this method comprises:

The Web TV application server receives the SIP conversation request of being initiated by the network TV terminal function, comprises the SIP unified resource designator URI of indication channel identication information in described SIP conversation request;

The described SIP URI of Web TV application server parses to be obtaining described channel identication information, and determines the television channel play to the network TV terminal function according to this channel information.

21. method as claimed in claim 20 is characterized in that, comprises the SIP URI that indicates default channel in the described SIP conversation request;

Described Web TV application server is determined described default channel according to local policy and/or user data.

22. method as claimed in claim 21 is characterized in that, definite mode of described default channel comprises:

Adopting the default or main channel of Web TV application server is described default channel; Or

The channel that adopts the user last time to watch is default channel; Or

The startup channel that adopts the user to be provided with is default channel.

23. method as claimed in claim 22 is characterized in that, this method further comprises:

Described Web TV application server utilizes sip response message to return definite default channel information to end side; Perhaps

Described Web TV application server utilizes sip response message to return definite default channel information and channel-group sign to end side; Perhaps

Described Web TV application server utilizes sip response message to return definite default channel information, channel-group sign and channel-group information about firms to end side.

24. method as claimed in claim 20 is characterized in that, comprises the SIP URI of specific channel of indication or channel-group in the described SIP conversation request; Described Web TV application server is resolved channel information according to local policy and/or service logic, determines specific channel or channel-group that end side is asked.

25. method as claimed in claim 20 is characterized in that, comprises the SIP URI that indicates specific channel-group in the described SIP conversation request; Described Web TV application server is resolved channel information according to local policy and/or service logic, determines the specific channel-group that end side is asked, and adopts in the following manner any to determine initial channel:

Adopting the interior default channel of channel-group of Web TV application server setting is initial channel; Or

The interior channel of this channel-group that adopts the user last time to watch is an initial channel; Or

The interior default channel of the channel-group that adopts the user to be provided with is an initial channel.

26. method as claimed in claim 24 is characterized in that,

Described SIP URI comprises:

Specific channel number and/or specific channel designation; Or

Specific channel number and/or specific channel designation, or and the channel-group information that comprises this specific channel ownership;

Specific channel group name claims and/or specific channel group #.

27. method as claimed in claim 24 is characterized in that, this method further comprises:

Described Web TV application server utilizes sip response message to return definite specific channel information to end side; Perhaps

Described Web TV application server utilizes sip response message to return definite specific channel information and channel-group sign to end side; Perhaps

Described Web TV application server utilizes sip response message to return definite specific channel information, channel-group sign and channel-group information about firms to end side; Perhaps

The Web TV application server utilizes sip response message to return channel-group sign and channel-group information about firms to the network TV terminal function.

28. the method for television services is provided in the SIP network, it is characterized in that this method comprises:

The television channel identification server receives the SIP URI query requests that comprises TV unified resource designator URI from end side, the television channel identification server is according to the corresponding relation of TV URI and SIP URI, to send to end side corresponding to the SIP URI of TV URI, wherein in described SIP URI, comprise channel identication information;

The Web TV application server receives the SIP conversation request of being initiated by end side, comprises described SIP URI in described SIP conversation request;

The described SIP URI of Web TV application server parses to be obtaining described channel identication information, and determines channel information according to this channel identication information.

29. method as claimed in claim 28 is characterized in that, carries described channel information by spreading parameter or extending user type in SIP URI.

30., it is characterized in that described channel information comprises: at least one combination in any among member's channel information of the title of channel and/or channel-group, channel number, channel type, channel-group or the service provider as claim 28 or 29 described methods.

31. the method for television services is provided in the SIP network, it is characterized in that this method comprises:

IP Multimedia System core Core IMS receives the SIP conversation request that is sent by end side, comprises TV URI in described SIP conversation request; Core IMS sends SIP URI query requests according to the TV URI that is resolved to the television channel identification server;

The television channel identification server will send to Core IMS corresponding to the SIP URI of TV URI according to the corresponding relation of TV URI and SIP URI, comprise channel identication information in described SIP URI;

Core IMS is routed to the Web TV application server according to the SIP URI that receives with described SIP conversation request, the described SIP URI of Web TV application server parses to be obtaining described channel identication information, and determines the channel information that sends to end side according to this channel identication information.

32. method as claimed in claim 31 is characterized in that, comprises the SIP URI that indicates default channel in the described SIP conversation request;

Described Web TV application server is determined described default channel according to local policy and/or user data.

33. method as claimed in claim 31 is characterized in that, definite mode of described default channel comprises:

Adopting the default or main channel of Web TV application server is default channel; Or

The channel that adopts the user last time to watch is default channel; Or

The startup channel that adopts the user to be provided with is default channel.

34. as claim 31,32 or 33 described methods, it is characterized in that, comprise the SIP URI that indicates specific channel in the described SIP conversation request; Described SIP URI comprises:

Specific channel number and/or specific channel designation; Or

Specific channel number and/or specific channel designation, and the channel-group information that comprises this specific channel ownership; Or

Specific channel group name claims and/or specific channel group #.

35. a network television system comprises end side and network side, it is characterized in that,

Described end side comprises the module that sends the channel identication information of user's specified channel to network side, and wherein said end side is carried at channel identication information in the business request information and sends;

Described network side comprises module from the channel information of described identification information correspondence to end side that return, and wherein said end side is receiving channels information from the service request response message that network side returns.

36. system as claimed in claim 35 is characterized in that, described module from the channel information of described identification information correspondence to end side that return is the application processing module of network side.

37. system as claimed in claim 36 is characterized in that, described end side also comprises specifies the channel identication information of the channel correspondence of closing to notify the module of described application processing module the user.

38. system as claimed in claim 36 is characterized in that, described end side comprises that also the channel identication information with the switching target channel correspondence of user's appointment sends to the module of described application processing module; Described application processing module is according to the channel identication information of switching target channel correspondence, and the channel information of the switching target channel of correspondence is sent to end side.

39. as claim 36,37 or 38 described systems, it is characterized in that described network side also comprises the session processing module, between described end side and described application processing module, transmit described channel identication information and described channel information.

40. the system that television services is provided in session initiation protocol SIP network is characterized in that, comprising:

The network TV terminal function is used for initiating the SIP conversation request to the Web TV application server, comprises the SIP unified resource designator URI that indicates channel information in described SIP conversation request;

The Web TV application server is used to resolve described SIP URI obtaining described channel information, and determines the television channel play to the network TV terminal function according to this channel information.

41. the system of television services is provided in the SIP network as claimed in claim 40, it is characterized in that this system further comprises the television channel identification server of preserving TV unified resource identifier TV URI and SIP URI corresponding relation,

The network TV terminal function is used for sending the SIP URI query requests comprise TV URI to the television channel identification server, and sends the SIP conversation request that includes the SIP URI that the television channel identification server returned to the Web TV application server;

The television channel identification server is used for the corresponding relation according to TV URI and SIP URI, will send to the network TV terminal function corresponding to the SIP URI of this TV URI.

42. the system of television services is provided in the SIP network as claimed in claim 41, it is characterized in that, this system further comprises IP Multimedia System core Core IMS, and Core IMS is used for described SIP conversation request is routed to the Web TV application server from the network TV terminal function.

43. the system of television services is provided in the SIP network as claimed in claim 40, it is characterized in that, this system further comprises Core IMS and television channel identification server, and wherein the television channel identification server is preserved the corresponding relation of TV URI and SIP URI;

The network TV terminal function is used for sending the SIP conversation request to Core IMS, comprises TV URI in described SIP conversation request;

Core IMS is used for sending SIP URI query requests according to the TV URI that is resolved to the television channel identification server, and according to the SIP URI that receives described SIP conversation request is routed to the Web TV application server;

The television channel identification server is used for the corresponding relation according to TV URI and SIP URI, will send to Core IMS corresponding to the SIP URI of TV URI.

44., it is characterized in that described SIP network comprises one of following network: next generation network NGN, IMS network or based on the IPTV network of IMS as the system of television services is provided in each described SIP network among the claim 40-43.

45. a network TV terminal function is characterized in that, comprises that the SIP conversation request is initiated the unit and TV information represents the unit, wherein:

The SIP conversation request is initiated the unit, is used for initiating the SIP conversation request to the Web TV application server, comprises the SIP URI that indicates channel information in described SIP conversation request;

TV information represents the unit, is used to receive the television channel information of being determined according to this channel information by the Web TV application server, and represents described television channel information.

46. a network TV terminal function is characterized in that, comprises that the SIP conversation request is initiated the unit and TV information represents the unit, wherein:

The SIP conversation request is initiated the unit, be used for sending the SIP URI query requests that comprises TVURI to the television channel identification server, the SIP URI that reception is returned by the television channel identification server corresponding to this TV URI, and initiate to comprise the SIP conversation request of SIP URI to the Web TV application server, in described SIP URI, comprise channel information;

TV information represents the unit, is used to receive the television channel information of being determined according to this channel information by the Web TV application server, and represents described television channel information.

47. a Web TV application server is characterized in that, comprises that channel information acquiring unit and TV information provide the unit, wherein:

The channel information acquiring unit is used to receive the SIP conversation request, and resolves described SIP URI to obtain described channel information, wherein at the described SIP URI that indicates channel information that comprises in the SIP conversation request;

TV information provides the unit, is used for according to the definite television channel of playing to the network TV terminal function of this channel information, and sends described television channel information to described network TV terminal function.

48. a television channel identification server is characterized in that, comprises corresponding relation preservation unit and SIP URI query unit, wherein

Corresponding relation is preserved the unit, preserves the corresponding relation of TV URI and SIP URI;

SIP URI query unit, be used to receive the SIP URI query requests that comprises TV URI that network TV terminal function or Core IMS are sent, and, will send to described network TV terminal function or Core IMS corresponding to the SIP URI of this TV URI according to the corresponding relation of TV URI and SIP URI.

49. a Core IMS is characterized in that, comprises TV URI resolution unit and routing unit, wherein

TV URI resolution unit is used for receiving the SIP conversation request that includes TV URI from the network TV terminal function, parses TV URI from described SIP conversation request, and sends SIP URI query requests to the television channel identification server;

Routing unit is used for described SIP conversation request is routed to the Web TV application server, wherein comprises the SIP URI that is returned in response to described SIPURI query requests by the television channel identification server in described SIP conversation request.

50. terminal, comprise the command reception module that is used to receive user's operational order, it is characterized in that described terminal also comprises the module of the channel identication information that sends described command reception module specified channel, wherein channel identication information is carried in the business request information and sends.

51. terminal as claimed in claim 50 is characterized in that, described terminal also comprises the module of the channel identication information of the channel correspondence that the described command reception module appointment of transmission is closed.

52. terminal as claimed in claim 50 is characterized in that, described terminal also comprises the module of the channel identication information of the switching target channel correspondence that sends the appointment of described command reception module.

53. application processing module, comprise the receiver module that is used to the information that receives, it is characterized in that described application processing module also comprises the channel identication information that receives according to described receiver module, send the module of the channel information of described identification information correspondence by the service request response message.

54. application processing module as claimed in claim 53, it is characterized in that, described application processing module also comprises the channel identication information of the switching target channel correspondence that receives according to described receiver module, sends the module of the channel information of corresponding switching target channel.

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