WO2009155821A1 - 点播业务中内容切换的方法、装置和系统 - Google Patents

点播业务中内容切换的方法、装置和系统 Download PDF

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Publication number
WO2009155821A1
WO2009155821A1 PCT/CN2009/072114 CN2009072114W WO2009155821A1 WO 2009155821 A1 WO2009155821 A1 WO 2009155821A1 CN 2009072114 W CN2009072114 W CN 2009072114W WO 2009155821 A1 WO2009155821 A1 WO 2009155821A1
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WO
WIPO (PCT)
Prior art keywords
content
content identifier
demand
switching
user equipment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2009/072114
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English (en)
French (fr)
Inventor
王丰
和晓艳
黄灵芝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to EP09768746A priority Critical patent/EP2296377A4/en
Publication of WO2009155821A1 publication Critical patent/WO2009155821A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00Television systems
    • H04N7/16Analogue secrecy systems; Analogue subscription systems
    • H04N7/173Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309Transmission or handling of upstream communications
    • H04N7/17318Direct or substantially direct transmission and handling of requests
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47End-user applications
    • H04N21/472End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/835Generation of protective data, e.g. certificates
    • H04N21/8352Generation of protective data, e.g. certificates involving content or source identification data, e.g. Unique Material Identifier [UMID]

Definitions

  • the present invention relates to the field of network technologies, and in particular, to a method, device and system for content switching in an on-demand service.
  • IPTV Internet Protocol Television
  • the streaming media service is the core service of the IPTV.
  • the user equipment User Equipment, UE
  • the content on demand is a unicast mode on the network side.
  • the network device and the UE-to-one transmission channel are established, and the streaming media is transmitted to the UE.
  • the network bandwidth requirement is relatively large.
  • the switching of the on-demand content needs to re-initiate the session request, and re-establish the channel between the network device and the UE.
  • the inventor has found that at least the following problems exist in the prior art: in the prior art, after the content is switched, the channel needs to be re-established, but it is likely that the user has established the same channel in the previous on-demand service, thereby causing The waste of network resources consumes bandwidth of the backbone network, and at the same time, the content switching time is slow, which affects the user experience. Summary of the invention
  • the embodiments of the present invention provide a method, an apparatus, and a system for content switching in an on-demand service, which can effectively utilize network resources and speed up content switching.
  • An embodiment of the present invention provides a method for content switching in an on-demand service, including: receiving a current on-demand content identifier sent by a user equipment; determining, by using a content identifier list of a media channel corresponding to the current on-demand content identifier; Content identification list for content switching.
  • the embodiment of the present invention further provides an apparatus for content switching in an on-demand service, including: a receiving module, configured to receive a current on-demand content identifier sent by a user equipment; and a determining module, configured to determine that the re-use can correspond to the current on-demand content identifier a content identification list of the media channel; a switching module, configured to perform content switching according to the content identification list.
  • the embodiment of the present invention further provides a system for content switching in an on-demand service, including: a first service control function entity, configured to receive a current on-demand content identifier sent by a user equipment; and a first media function entity, configured to determine that the device can be reused
  • the content identification list of the media channel corresponding to the current on-demand content identifier configured to perform content switching according to the content identification list.
  • the embodiment of the present invention further provides a system for content switching in an on-demand service, including: a second service control function entity, configured to receive a current on-demand content identifier sent by the user equipment; and configured to determine that the current on-demand and the current on-demand The content identifier list of the media channel corresponding to the content identifier; the second media function entity, configured to perform content switching according to the content identifier list.
  • a second service control function entity configured to receive a current on-demand content identifier sent by the user equipment; and configured to determine that the current on-demand and the current on-demand The content identifier list of the media channel corresponding to the content identifier
  • the second media function entity configured to perform content switching according to the content identifier list.
  • the embodiment of the present invention determines that the content identifier list of the media channel corresponding to the current on-demand content identifier can be reused, and when the content identifier in the content identifier list that is carried in the handover request is initiated, the previously established media is used.
  • the channel sends the corresponding content instead of re-establishing a new media channel to send the corresponding content, which has the following beneficial effects:
  • Reusing the media channel in the network can save network resources
  • FIG. 1 is a schematic flowchart of Embodiment 1 of a method for content switching in an on-demand service according to the present invention
  • FIG. 2 is a schematic flowchart of a method for switching content in an on-demand service according to Embodiment 2 of the present invention
  • FIG. 4 is a schematic flowchart of Embodiment 4 of a method for content switching in an on-demand service according to the present invention
  • FIG. 5 is a schematic flowchart of Embodiment 5 of a method for content switching in an on-demand service according to the present invention
  • FIG. 7 is a schematic flowchart of Embodiment 7 of a method for content switching in an on-demand service according to the present invention
  • FIG. 1 is a schematic flowchart of Embodiment 1 of a method for content switching in an on-demand service according to the present invention
  • FIG. 2 is a schematic flowchart of a method for switching content in an on-demand service according to Embodiment 2 of the present invention
  • FIG. 8 is a schematic structural diagram of Embodiment 1 of a device for content switching in an on-demand service according to the present invention
  • FIG. 9 is a schematic structural diagram of Embodiment 2 of a device for switching content in an on-demand service according to the present invention
  • FIG. 10 is a schematic structural diagram of Embodiment 3 of a device for content switching in an on-demand service according to the present invention
  • Schematic diagram of the fourth embodiment of the apparatus
  • FIG. 12 is the content of the on-demand service of the present invention. Changing a system configuration diagram of a schematic embodiment; FIG. 13-demand service system for content switching schematic structural diagram of a second embodiment of the present invention.
  • FIG. 1 is a schematic flowchart of Embodiment 1 of a method for content switching in an on-demand service according to the present invention.
  • the embodiment includes:
  • Step 11 The network side device receives the current on-demand content identifier sent by the UE.
  • the current on-demand content identifier may be carried in an on-demand message, and the current on-demand content identifier is used to enable the UE to obtain the currently on-demand content.
  • Step 12 The network side device determines that the content identifier list of the media channel corresponding to the current on-demand content identifier can be reused. First, determine that the media corresponding to the current on-demand content identifier can be reused.
  • the switching content identifier of the channel, the content corresponding to the switching content identifier needs to be located in the same media function entity (Media Function, MF) as the current on-demand content corresponding to the current on-demand content identifier, and/or the bandwidth of the media channel transmitting the switching content is not greater than the transmission
  • Media Function Media Function
  • the content identification list is formed by the switching content identifiers.
  • Step 13 The network side device performs content switching according to the content identification list.
  • the network side device may send the content identifier list to the UE, and the UE sends a handover message carrying the handover content identifier in the content identifier list to the network side device, so that the network side device performs content switching according to the handover content identifier.
  • the network side device may send the content identifier list to the UE, and the UE sends a handover message carrying the handover content identifier in the content identifier list to the network side device, so that the network side device performs content switching according to the handover content identifier.
  • the network side device determines the content identifier list according to the playlist configured by the user equipment, the network side device does not send the content to the UE, and the network side device senses the switchover, and the network side device senses the switchover, including the end of the current on-demand content playback or The network side needs to actively deliver new content.
  • the network side may perform content switching without directly notifying the UE before automatically switching the content, or notify the UE before automatically switching the content, and then perform content switching after receiving the handover message of the UE. For details, please refer to the following embodiments five-six.
  • the UE can initiate the handover according to the obtained content identifier, without re-establishing the media channel, saving network resources, and speeding up the content switching speed.
  • Embodiment 2 is a schematic flowchart of Embodiment 2 of a method for content switching in an on-demand service according to the present invention.
  • This embodiment takes an IPTV service based on an IP Multimedia Subsystem (IMS) as an example, and the UE passes an IMS core network (IMS Core).
  • IMS Core IP Multimedia Subsystem
  • the device on the network side includes a service control function (SCF) and a media function entity (MF).
  • SCF service control function
  • MF media function entity
  • Step 201 The UE sends an on-demand message to the IMS Core.
  • the on-demand message carries the current on-demand content identifier: the current CID; and may also carry the content identifier that is desired to be subsequently clicked: the desired on-demand content identifier (desired on-demand CID), and the desired on-demand content identifier may be one or more.
  • Session Initiation Protocol Ses Sion Initial Protocol (SIP) header field
  • Session Description Protocol SDP
  • XML eXtensi ble Makeup Language
  • Method 2 Adopt the newly extended header field, for example, Switch: first expected on-demand CID, second-order on-demand CID, ....
  • Step 202 The IMS Core routes the on-demand message to the SCF.
  • Step 203 The SCF obtains the subscription data of the UE according to the on-demand message, performs access authority verification on the content identifier carried in the on-demand message according to the subscription data, and deletes the content identifier that does not have the access authority. Or the SCF obtains all content identifiers that the UE has access rights according to the subscription data.
  • Step 204 The SCF routes the on-demand message to the MF corresponding to the current on-demand content identifier (the current on-demand content identifier), where the content identifier after the access authority verification is carried.
  • Step 205 The MF parses the on-demand message, determines whether the desired on-demand content identifier carried in the identifier can be reused with the current on-demand content identifier, and forms the content identification list by re-using the desired on-demand content identifier. Or determining, in all the content identifiers that the UE has the access right, that the content identifier of the media channel that can be used by the current on-demand content identifier is used to form a content identifier list.
  • the content identifier in the content identifier list is determined in all content identifiers in which the UE has the access right; or, if the content identifier carried in the on-demand message includes the current on-demand content identifier
  • the content identification in the content identification list may be determined in all content identifiers in which the UE has access rights, or only in the desired on-demand content identification.
  • the manner of the content identifier in the content identifier list carried in the response may be in the SIP header mode, the SDP description mode, or the XML description mode. For details, refer to the carrying mode described in step 21.
  • the content identifier in the content identifier list can be in the format of: SIP URL format or RTS P URL format or ContentID format.
  • Step 209 The UE acquires the content identifier list.
  • Step 210 The UE and the MF establish a media channel, and the current on-demand content corresponding to the current on-demand content identifier is transmitted through the media channel.
  • the media channel can be a media control channel and/or a media delivery channel.
  • Step 211 When the UE needs to perform fast content switching, the UE selects a switching content identifier located in the content identifier list, and sends a handover message carrying the switching content identifier to the MF.
  • the handover message may be a Real Time Streaming Protocol (RTSP) message or a SIP message.
  • RTSP Real Time Streaming Protocol
  • Step 212 The MF acquires a handover content identifier, returns a corresponding response (200 0K) to the UE, and locates a new media location according to the handover content identifier, to obtain content corresponding to the handover content identifier.
  • Step 213 The MF reuses the media channel established according to the current on-demand content identifier, and sends the switched content to the UE through the media channel.
  • the on-demand message may only carry the content identifier of the current on-demand, and may also carry the current on-demand content identifier and one or more subsequent desired on-demand content identifiers; the MF determines the content identifier of the reusable media channel, and the content identifier Can be determined in the content identification that is desired to be on-demand, and It is determined in all the content identifiers that the UE has the access right, and is delivered by the response corresponding to the on-demand message, and the carrying manner and the adopted format of the content identifier are diversified.
  • the media channel can be reused in this embodiment, which saves network resources and speeds up the switching speed, and can be applied to different scenarios.
  • FIG. 3 is a schematic flowchart of a method for performing content switching in an on-demand service according to a third embodiment of the present invention.
  • the second embodiment is different from the second embodiment.
  • the execution entity of the reused media channel is determined to be an SCF, that is, the following step 303- 305 replaces steps 203-205, and the remaining steps are the same as in the second embodiment:
  • Step 303 The SCF acquires subscription data of the UE according to the on-demand message, and acquires, according to the subscription data, all content identifiers that the UE has access rights. Then, the content identifier of the media channel corresponding to the current on-demand content identifier is determined to be re-used according to the content identifiers having the access rights, and the content identifier list is formed; or the access-on-demand content identifier carried in the on-demand message is determined to have access rights. And the content identifier of the media channel corresponding to the current on-demand content identifier may be reused to form a content identifier list.
  • Step 304 The SCF routes the on-demand message to the MF corresponding to the current on-demand content identifier, where the content identifier list is carried.
  • Step 305 The MF parses the on-demand message, sends the content identifier list to the UE, or verifies the content identifier in the content identifier list, and verifies whether the media channel corresponding to the current on-demand content identifier can be reused, and the verification is passed.
  • the SMF after the SCF determines the content identifier list, the SMF sends the MF to the MF, and the MF forwards the MF to the UE.
  • the SCF determines the content identifier list and sends the content identifier to the UE directly, without MF forwarding.
  • the on-demand message may carry only the current on-demand content identifier, and may also carry the current on-demand content identifier and one or more subsequent desired on-demand content identifiers; the SCF determines the content identifier of the reusable media channel, and the content identifier It may be determined in the content identifier that is desired to be on-demand, and may also be determined in all the content identifiers that the UE has the access right; and the content identifier list is delivered by the response corresponding to the on-demand request, and the content identifier is carried in a format and has a format. diversification.
  • the media channel can be reused in this embodiment, which saves network resources and speeds up the switching speed, and can be applied to different scenarios.
  • the second embodiment of the present invention is different from the content identifier list by using a response corresponding to the on-demand message.
  • the message carries a list of content identifiers that are returned to the UE.
  • the embodiment includes: Step 41: The network side device acquires a content identifier list, where the content identifier in the content identifier list can reuse a media channel corresponding to the current on-demand content identifier.
  • the content identifier list may be determined by the MF as shown in the second embodiment, or may be determined by the SCF as shown in the third embodiment, or may be determined by using the MF and the SCF. For the specific process, refer to the second or third embodiment, and details are not described herein again.
  • Step 42 The network side sends the content identification list by using a newly initiated message.
  • the newly-initiated message may be a SIP Notify message or an Info message or a message message, and may be carried in the SIP header field mode or the SDP description mode or the XML mode as shown in the second embodiment.
  • the content identifier in the content identifier list may be in the format of the ContentID format or the SIP URL format or the RTSP URL format as shown in the second embodiment.
  • the entity that sends the content identifier list on the network side may be an SCF or an MF.
  • Step 43 The UE obtains the content identifier list.
  • Step 44 The UE and the network side device establish a media channel according to the current on-demand content identifier, and transmit content corresponding to the current on-demand content identifier through the media channel.
  • the step and the foregoing steps 41, 42, and 43 have no sequence, and the UE may first obtain the content identification list, establish a media channel, or establish a media channel first, and then the UE obtains the content identifier, or both.
  • Step 45 The UE initiates a handover message, and carries a handover content identifier located in the content identifier list.
  • Step 46 The UE receives the corresponding response 200 OK o
  • Step 47 The UE receives content corresponding to the switched content identifier, and the switched content is transmitted through the media channel.
  • the on-demand request may only carry the content identifier of the current on-demand, and may also carry the current on-demand content identifier and the content identifier of the subsequent desired on-demand; the network-side device determines the reusable medium.
  • a content identifier of the volume channel the content identifier may be determined in a content identifier that is desired to be clicked, and may also be determined in all content identifiers in which the UE has access rights; the content identifier list is carried by the newly initiated message, and the content identifier is carried
  • the format adopted is diversified.
  • the media channel can be reused in this embodiment, which saves network resources and speeds up the switching speed, and can be applied to different scenarios.
  • FIG. 5 is a schematic flowchart of Embodiment 5 of a method for content switching in an on-demand service according to the present invention, where the embodiment includes:
  • Step 51 The UE establishes a media channel corresponding to the current on-demand content identifier with the MF, and sends the current on-demand content to the UE.
  • the UE sends an on-demand message carrying the current on-demand content identifier to the SCF, and the SCF forwards the on-demand message to the MF corresponding to the current on-demand content identifier, and negotiates the establishment and current
  • the on-demand content identifier corresponds to the media channel
  • the MF sends the current on-demand content corresponding to the current on-demand content identifier to the UE through the media channel.
  • Step 52 The UE sends a playlist configured by the UE to the SCF.
  • the playlist includes one or more desired on-demand content identifiers, and the playlists can be configured outside the session via an HTTP message or a SIP message or a Ut interface.
  • the steps 51 and 52 are not limited in time, and the current on-demand content can be played first, and then the playlist is obtained, or the playlist is obtained first, and then the current on-demand content is played, or when the UE sends the on-demand message to the SCF.
  • the playlist is not limited in time, and the current on-demand content can be played first, and then the playlist is obtained, or the playlist is obtained first, and then the current on-demand content is played, or when the UE sends the on-demand message to the SCF.
  • the playlist is not limited in time, and the current on-demand content can be played first, and then the playlist is obtained, or the playlist is obtained first, and then the current on-demand content is played, or when the UE sends the on-demand message to the SCF.
  • Step 53 SCF returns 200 OKo
  • Step 54 The network side device determines, in the playlist, a handover content identifier that can reuse a media channel corresponding to the current on-demand content identifier, where the handover content identifier constitutes a content identifier list.
  • the network side device that determines the content identifier list may be an SCF or an MF. For details, refer to the foregoing embodiment.
  • Step 55 The network side device senses the handover, such as the current on-demand content is played or the network side needs to actively send new content.
  • Step 56 The MF sends and switches the content to the UE through the media channel established above.
  • the corresponding content is identified, and the switched content identifier is obtained according to a pre-stored playlist, and the content switching is implemented.
  • the UE stores the playlist in the network side in advance, and the network side device determines that the content identifier list of the media channel can be reused according to the playlist, and does not send the content identifier list to the UE, but is perceived by the network side device. Switch to content after switching.
  • FIG. 6 is a schematic flowchart of Embodiment 6 of a method for content switching in an on-demand service according to the present invention, and different from Embodiment 2, 3, and 4 by directly returning a content identifier list to a UE by using a message, in this embodiment, by providing service selection
  • the server SSF (Sevice Select Function) provides a playlist to the UE, where the playlist may be delivered to the UE at one time, or may be provided to the UE in batches.
  • This embodiment includes:
  • Step 61 The network side device obtains a content identification list.
  • the content identifier in the content identifier list may reuse the media channel corresponding to the current on-demand content identifier.
  • the content identifier list may be determined by the MF as shown in the second embodiment, or may be determined by the SCF as shown in the third embodiment, or may be determined by using the MF and the SCF.
  • the MF may be determined by the MF as shown in the second embodiment, or may be determined by the SCF as shown in the third embodiment, or may be determined by using the MF and the SCF.
  • Step 62 Transfer the content identification list obtained in step 61 to the SSF.
  • the delivery mode can be carried by a new message or a response of the message, and can be, but is not limited to, a header field or a message body.
  • the format of the content identifier in the content identifier list may be a ContentID format or a SIP URL format or an RTSP URL format as shown in Embodiment 2.
  • Step 63 The UE interacts with the SSF to obtain the content identifier list, and may use other messages such as HTTP.
  • the manner in which the EPG is displayed is taken as an example, that is, the SSF presents the foregoing content list to the UE in the form of an EP G, and may be all provided at one time, or may be queried by the UE in batches from the SSF.
  • Step 64 The UE initiates an on-demand request, where the on-demand request carries the current on-demand content identifier, establishes a media channel with the network-side device according to the current on-demand content identifier, and transmits the program content corresponding to the current on-demand content identifier through the media channel.
  • the step and the foregoing steps 61, 62, and 63 have no sequence, and the UE may first obtain the content identifier list, initiate the on-demand request, establish a media channel of the content corresponding to the current on-demand content identifier, or initiate an on-demand request to establish the current
  • the on-demand content identifies the media channel of the corresponding content, and then the UE acquires the content identifier; or the two processes are performed simultaneously.
  • Step 65 The UE initiates a handover message carrying the handover content identifier.
  • the switching content identifier is from E
  • the handover message can be a SIP message or an RTSP message.
  • Step 66 The UE receives the corresponding response 200 OKo
  • Step 67 The UE receives the content corresponding to the switched content identifier, and the switched content is transmitted through the media channel.
  • the on-demand request of step 64 may only carry the content identifier of the current on-demand, and may also carry the content identifier of the current on-demand and the content identifier of the subsequent desired on-demand; the network side device determines the content identifier of the reusable media channel, The content identifier may be determined in the content identifier that is desired to be on-demand, and may also be determined in all content identifiers in which the UE has the access right; the content identifier list is carried by the newly initiated message or the response of the previous message, and the content identifier is carried, The format adopted is diversified.
  • the media channel can be reused in this embodiment, which saves network resources and speeds up the switching speed, and can be applied to different scenarios.
  • FIG. 7 is a schematic flowchart of Embodiment 7 of a method for content switching in an on-demand service according to the present invention. The difference from Embodiment 5 is to add the following steps 71-74 in steps 55 and 56.
  • Step 71 The MF sends a notification message to the UE, and notifies the UE to perform content switching, where the notification message carries the handover content identifier.
  • Step 72 The UE returns 200 0 ⁇ to the MF.
  • Step 73 The UE sends a handover message to the MF.
  • Step 74 The MF returns 200 0 ⁇ to the UE.
  • the UE stores the playlist in the network side in advance, and the network side device does not send the content identifier list to the UE after the content identifier list of the media channel can be reused according to the playlist, but the network side device senses After switching, notification The UE performs content switching, and performs content switching after receiving the handover message of the UE.
  • FIG. 8 is a schematic structural diagram of Embodiment 1 of an apparatus for switching content in an on-demand service according to the present invention.
  • the embodiment includes a receiving module 81, a determining module 82, and a switching module 83.
  • the receiving module 81 is configured to receive the current content-on-demand identifier sent by the UE
  • the determining module 82 is configured to determine, by using the content identifier list, the content identifier list of the media channel corresponding to the current on-demand content identifier. Content switching.
  • the current on-demand content identifier may be carried by the on-demand message, and the content identifier that can be carried in the on-demand message may be the current on-demand content identifier or the current on-demand content identifier and the content identifier that is desired to be on-demand.
  • the content identification in the content identification list may be determined in the desired on-demand content identification or in all of the content identifications having access rights.
  • the content identification list can be delivered by a response corresponding to the on-demand message or a newly initiated message.
  • the method of carrying the content identifier in the on-demand message or in the content identifier list may be a SIP header field mode or an SDP description mode or an XML description mode, and the content identifier format may be a SIP URL format or an RTSP URL format or a Content ID format.
  • the embodiment may further include an establishing module, where the switching module 83 may specifically include an information module; the establishing module is configured to establish, according to the current on-demand content identifier, a media channel with the user equipment, by using the media channel The user equipment sends the content corresponding to the current on-demand content identifier; the information module is configured to receive the handover information of the user equipment, determine a handover content identifier, where the handover content identifier is located in the content identifier list; And transmitting, by using the media channel, content corresponding to the switched content identifier to the user equipment.
  • the switching module 83 may specifically include an information module
  • the establishing module is configured to establish, according to the current on-demand content identifier, a media channel with the user equipment, by using the media channel
  • the user equipment sends the content corresponding to the current on-demand content identifier
  • the information module is configured to receive the handover information of the user equipment, determine a handover content identifier, where the handover content identifier
  • FIG. 9 is a schematic structural diagram of Embodiment 2 of an apparatus for switching content in an on-demand service according to the present invention.
  • the embodiment includes a receiving module 91, a determining module 92, a switching module 93, and an establishing module 94.
  • the switching module 93 includes an information module 931.
  • a sending module 932 is included.
  • the receiving module 91 is configured to receive an on-demand message sent by the UE, where the on-demand message carries the current on-demand content identifier; the determining module 92 is configured to determine that the content identifier list of the media channel corresponding to the current on-demand content identifier can be reused; And the establishing module 94 is configured to establish, according to the current on-demand content identifier, a media channel with the user equipment, and send, by using the media channel, the user equipment
  • the information module 931 is configured to receive the handover message sent by the user equipment, where the handover message carries the handover content identifier; the establishing module 94 is further configured to use the media channel to the user The device sends content corresponding to the switched content identifier.
  • the determining module determines that the content identifier of the media channel can be reused, so that after the UE initiates a new switching message carrying the content identifier in the content identifier list, the media channel can be directly reused, thereby saving network resources and speeding up switching. speed.
  • the embodiment includes a receiving module 101, a determining module 102, a switching module 103, and an establishing module 104.
  • the switching module 103 includes an information module 1031.
  • the receiving module 101 is configured to receive an on-demand message sent by the UE, where the on-demand message carries the current on-demand content identifier.
  • the information module 1031 is configured to acquire a playlist configured by the user equipment, where the determining module 102 is specifically configured to determine, in the playlist, a handover content identifier that can reuse a media channel corresponding to the current on-demand content identifier, where the content identifier is The list includes the switching content identification.
  • the establishing module 104 is configured to establish a media channel with the user equipment according to the current on-demand content identifier, and send content corresponding to the current on-demand content identifier to the user equipment by using the media channel; And sending, by the media channel, content corresponding to the switched content identifier to the user equipment.
  • the UE stores a playlist in advance to the network side, and the network side device determines, in the playlist, a content identifier list that can reuse the media channel. And, the network side device does not send to the UE.
  • the content identification list but the content is directly switched after the network side senses the switch. Therefore, not only can the media channel be directly reused, network resources are saved, the switching speed is accelerated, and the process can be saved.
  • FIG. 11 is a schematic structural diagram of Embodiment 4 of an apparatus for switching content in an on-demand service according to the present invention.
  • the embodiment includes a receiving module 111, a determining module 112, a switching module 113, and an establishing module 114.
  • the switching module includes an information module 1131, and further includes a notification. Module 1132.
  • the receiving module 111 is configured to receive an on-demand message sent by the UE, where the on-demand message carries the current on-demand content identifier, and the information module 1131 is configured to acquire the playlist configured by the user equipment.
  • the determining module 112 is specifically configured to determine, in the playlist, a switching content identifier that is capable of reusing a media channel corresponding to the current on-demand content identifier, where the content identifier list includes the switching content identifier.
  • the notification module 1132 is configured to send a notification message carrying the handover content identifier to the UE when the network side senses the handover, and notify the UE to perform content switching.
  • the establishing module 114 is configured to establish a media channel with the user equipment according to the current on-demand content identifier, and send content corresponding to the current on-demand content identifier to the user equipment by using the media channel; and configured to receive at the information module 1131 After the switching message sent by the user equipment, the content corresponding to the switching content identifier is sent to the user equipment by using the media channel.
  • the UE stores a playlist in advance to the network side, and the network side device determines, in the playlist, a content identifier list that can reuse the media channel. Moreover, the network side device does not send the content identifier list to the UE, but notifies the UE to perform content switching after the network side senses the handover, and directly switches the content after receiving the handover request of the U E to agree to the handover. Therefore, not only can the media channel be directly reused, network resources are saved, the switching speed is accelerated, and the process can be saved.
  • FIG. 12 is a schematic structural diagram of Embodiment 1 of a system for switching content in an on-demand service according to the present invention.
  • the embodiment includes: a first SCF 121 and a first MF 122.
  • the first SCF 121 is configured to receive a current on-demand content identifier sent by the UE. Determining that the content identification list of the media channel corresponding to the current on-demand content identifier can be reused; and performing content switching according to the content identification list.
  • the first MF 122 is further configured to establish, by the UE, a media channel corresponding to the current on-demand content identifier, and send, by using the media channel, content corresponding to the current on-demand content identifier; Determining a switching content identifier, where the switching content identifier is located The content identifier list is further configured to send content corresponding to the switched content identifier through the media channel.
  • the first MF 122 is configured to send the content identifier list to the UE, and is configured to receive a handover message that is sent by the UE and that carries the handover content identifier, where the handover content identifier is located in the content identifier list. Therefore, the first MF may use the media channel to send the UE corresponding to the handover content identifier or, in particular, the first SCF 121 is configured to receive the playlist of the UE; the first MF 122 is configured to determine the handover content identifier in the playlist. These switching content identifiers form a list of content identifiers.
  • the MF 122 may reuse the media channel to send the content corresponding to the handover content identifier to the UE.
  • the first MF 122 is further configured to send, to the UE, a notification message that carries the handover content identifier, and is specifically configured to: after receiving the handover message sent by the UE, send the content corresponding to the handover content identifier by using the media channel. That is, when the first MF 122 senses the handover, the UE is notified to perform the handover, and the content switching is performed after receiving the handover message of the UE.
  • the content identifier may be carried by the on-demand message, and the content identifier may be the current on-demand content identifier or the current on-demand content identifier and the content identifier that is desired to be on-demand.
  • the content identification in the content identification list can be determined in the desired on-demand content identification or in all content identifications with access rights.
  • the content identification list can be carried by a response corresponding to the on-demand message or a new message.
  • the method of carrying the content identifier in the on-demand message or in the content identifier list may be a SIP header domain mode or an SDP description mode or an XML description mode, and the content identifier format may be a SIP URL format or an RTSP URL format or a Content ID format.
  • the content identifier list is determined by the MF, and the content identifier in the content identifier list can reuse the media channel corresponding to the current on-demand content identifier, so that the network side device can directly reuse the media channel when the corresponding content is sent according to the switching content identifier. , save network resources and speed up switching.
  • the content identifier list may be sent to the UE, and the content switching may be performed after the UE sends the handover message.
  • the content identifier list may not be sent to the UE.
  • the switching is performed, the content switching is performed, and the content identification list is not sent to the UE.
  • the UE is notified to perform the handover, and after receiving the handover message of the UE, the content switching is performed.
  • FIG. 13 is a schematic structural diagram of Embodiment 2 of a system for switching content in an on-demand service according to the present invention.
  • the embodiment includes a second SCF 131 and a second MF 132.
  • the second SCF 131 is configured to receive a current on-demand content identifier sent by the UE. Reusing the content identification list of the media channel corresponding to the current on-demand content identifier; the second MF 132 is configured to perform content switching according to the content identification list.
  • the second MF 132 is further configured to establish, by the UE, a media channel corresponding to the current on-demand content identifier, and send, by using the media channel, content corresponding to the current on-demand content identifier; And switching the content identifier, where the switching content identifier is located in the content identifier list; and is further configured to send, by using the media channel, content corresponding to the switching content identifier.
  • the second SCF 131 is configured to send the content identifier list to the UE directly; or the second SCF 131 is configured to send the content identifier list to the second MF 132, where the second MF 132 is configured to forward the content identifier list to the The second MF 132 is further configured to receive a handover message that is sent by the UE and that carries the handover content identifier, where the handover content identifier is located in the content identifier list.
  • the second SCF 131 is configured to determine, in the playlist of the received UE, a handover content identifier, where the handover content identifier is located in the content identifier list.
  • the second MF 132 is further configured to send, to the UE, a notification message that carries the handover content identifier, and is specifically configured to: after receiving the handover message sent by the UE, send the content corresponding to the handover content identifier by using the media channel.
  • the content identifier list is determined by the SCF, and the switching content identifier in the content identifier list can reuse the media channel corresponding to the current on-demand content identifier, so that the network side device can directly reuse the media when the corresponding content is sent according to the switching content identifier. Channels, saving network resources and speeding up switching.
  • the SCF may send the content identifier list to the UE, and after the UE sends the handover message, the content is switched.
  • the SCF may be directly sent to the UE by the SCF, or may be sent by the SCF to the MF.
  • the content identification list may not be sent to the UE, and the content switching may be performed after the sensing is switched, and the content identification column may not be
  • the table is sent to the UE, and after the handover is notified, the UE is notified to perform handover, and after receiving the handover message of the UE, the content is switched.

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Description

点播业务中内容切换的方法、 装置和系统
本申请要求 2008年 6月 25日递交的申请号为 200810115608. 3、 发明名 称为 "点播业务中内容切换的方法、 装置和系统" 以及 2008年 12月 9 日递 交的申请号为 200810186978. 6、 发明名称为 "点播业务中内容切换的方法、 装置和系统" 的中国专利申请的优先权, 其全部内容通过引用结合在本申请 中。
技术领域
本发明涉及网络技术领域, 尤其是一种点播业务中内容切换的方法、 装 置和系统。
背景技术
基于 IP互联网络的电视 ( Internet Protocol Television, IPTV) 是一 种将电视机或个人计算机作为显示设备, 基于 IP网络传输, 向用户提供数字 电视、 视频服务、 信息服务、 互动休闲服务、 电子商务等多种宽带业务的技 术。 流媒体业务是 IPTV的核心业务, 用户设备 (User Equipment, UE) 可以 通过点播方式或广播方式接收流媒体。其中, 点播业务(Content On Demand, COD) 是由网络侧采用单播的方式, 建立网络设备和 UE—对一的传输通道, 向 UE传送流媒体, 对网络带宽的需求相对较大。 目前点播内容的切换需要重 新发起会话请求, 重新建立网络设备和 UE之间的通道。 发明人在实现本发明 的过程中发现现有技术至少存在如下问题: 现有技术中内容切换后, 需要重 新建立通道, 但是很可能用户在之前的点播业务中已经建立了相同的通道, 从而造成网络资源的浪费, 消耗骨干网络带宽, 同时使内容切换时间较慢, 影响用户体验。 发明内容
本发明实施例是提供一种点播业务中内容切换的方法、 装置和系统, 实 现有效利用网络资源、 加快内容切换速度。
本发明实施例提供了一种点播业务中内容切换的方法, 包括: 接收用户 设备发送的当前点播内容标识; 确定能够重用与所述当前点播内容标识对应 的媒体通道的内容标识列表; 根据所述内容标识列表进行内容切换。
本发明实施例还提供了一种点播业务中内容切换的装置, 包括: 接收模 块, 用于接收用户设备发送的当前点播内容标识; 确定模块, 用于确定能够 重用与所述当前点播内容标识对应的媒体通道的内容标识列表; 切换模块, 用于根据所述内容标识列表进行内容切换。
本发明实施例还提供了一种点播业务中内容切换的系统, 包括:第一业务 控制功能实体, 用于接收用户设备发送的当前点播内容标识; 第一媒体功能 实体, 用于确定能够重用与所述当前点播内容标识对应的媒体通道的内容标 识列表; 用于根据所述内容标识列表进行内容切换。
本发明实施例还提供了另一种点播业务中内容切换的系统, 包括: 第二 业务控制功能实体, 用于接收用户设备发送的当前点播内容标识; 还用于确 定能够重用与所述当前点播内容标识对应的媒体通道的内容标识列表; 第二 媒体功能实体, 用于根据所述内容标识列表进行内容切换。
由上述技术方案可知, 本发明实施例通过确定能够重用与当前点播内容 标识对应的媒体通道的内容标识列表, 当携带的所述内容标识列表中的内容 标识发起切换请求时, 采用先前建立的媒体通道发送相应内容, 而不是重新 建立新的媒体通道发送相应内容, 具有以下有益效果:
1、 重用网络中的媒体通道, 可以节约网络资源;
2、不必重新建立媒体通道,直接重用媒体通道,可以加快内容切换速度。 附图说明 此处所说明的附图用来提供对本发明的进一歩理解, 构成本申请的一部 分, 并不构成对本发明的限定。 在附图中:
图 1为本发明点播业务中内容切换的方法实施例一的流程示意图; 图 2为本发明点播业务中内容切换的方法实施例二的流程示意图; 图 3为本发明点播业务中内容切换的方法实施例三的流程示意图; 图 4为本发明点播业务中内容切换的方法实施例四的流程示意图; 图 5为本发明点播业务中内容切换的方法实施例五的流程示意图; 图 6为本发明点播业务中内容切换的方法实施例六的流程示意图; 图 7为本发明点播业务中内容切换的方法实施例七的流程示意图; 图 8为本发明点播业务中内容切换的装置实施例一的结构示意图; 图 9为本发明点播业务中内容切换的装置实施例二的结构示意图; 图 10为本发明点播业务中内容切换的装置实施例三的结构示意图; 图 11为本发明点播业务中内容切换的装置实施例四的结构示意图; 图 12为本发明点播业务中内容切换的系统实施例一的结构示意图; 图 13为本发明点播业务中内容切换的系统实施例二的结构示意图。
具体实施方式
下面通过附图和实施例, 对本发明的技术方案做进一歩的详细描述。 图 1 为本发明点播业务中内容切换的方法实施例一的流程示意图, 该实 施例包括:
歩骤 11 : 网络侧设备接收 UE发送的当前点播内容标识。其中, 当前点播 内容标识可以携带在点播消息中, 当前点播内容标识用于使 UE获取当前点播 的内容。
歩骤 12 : 网络侧设备确定能够重用与所述当前点播内容标识对应的媒体 通道的内容标识列表。 首先, 确定能够重用与当前点播内容标识对应的媒体 通道的切换内容标识, 切换内容标识对应的内容需要和当前点播内容标识对 应的当前点播内容位于相同的媒体功能实体(Media Function, MF) , 和 /或 传输切换内容的媒体通道的带宽不大于传输当前点播内容的媒体通道的带 宽; 其次, 由这些切换内容标识形成内容标识列表。
歩骤 13: 网络侧设备根据该内容标识列表进行内容切换。
其中, 网络侧设备可以将该内容标识列表发送给 UE, 由 UE向网络侧设备 发送携带位于内容标识列表中的切换内容标识的切换消息, 使网络侧设备根 据切换内容标识进行内容切换。 具体可以参见下面的实施例二-四。
或者, 网络侧设备根据用户设备配置的播放列表确定出内容标识列表后 不发送给 UE, 在网络侧设备感知切换后自动进行内容切换, 其中, 网络侧设 备感知切换包括当前点播的内容播放结束或者网络侧需要主动下发新的内 容。 并且, 网络侧在自动进行内容切换之前可以不通知 UE, 直接进行内容切 换, 或者在自动进行内容切换之前通知 UE, 在接收到 UE的切换消息后再进行 内容切换。 具体可以参见下面的实施例五 -六。
本实施例通过确定可以重用媒体通道的内容标识列表, 可以使 UE根据所 获取的内容标识发起切换, 而无需重新建立媒体通道, 节约网络资源, 加快 内容切换速度。
图 2 为本发明点播业务中内容切换的方法实施例二的流程示意图, 该实 施例以基于 IP多媒体子系统 ( IP Multimedia Subsystem, IMS) 的 IPTV业 务为例, UE通过 IMS核心网 (IMS Core) 与网络侧设备交互, 网络侧设备包 括业务控制功能实体(Service Control Function, SCF)和媒体功能实体(M edia Function, MF) 。 该实施例包括:
歩骤 201: UE向 IMS Core发送点播消息。 点播消息中携带当前点播内容 标识:当前 CID;还可以携带期望后续点播的内容标识:期望点播内容标识(期 望点播 CID) , 该期望点播内容标识可以为一个或是多个。
其中, 这些内容标识可以通过点播消息的消息头: 会话初始化协议 (Ses sion Initial Protocol, SIP) 头域, 点播消息的消息体: 会话描述协议 (S ession Description Protocol, SDP) 描述方式或扩展可标识语言 ( eXtensi ble Makeup Language, XML) 描述方式携带。 具体的:
1 ) 若通过 SIP头域方式:
方式一: TO: 当前 CID: 第一期望点播 CID: 第二期望点播 CI domain. com;
方式二: 采用新扩展的头域, 例如, Switch: 第一期望点播 CID, 第二期 望点播 CID, ……。
2) 若通过 SDP描述方式: 在 SDP描述的 a行携带期望点播 CID, 如 a=sw itch-list :第一期望点播 CID, 第二期望点播 CID, ……。
3) 若通过 XML描述方式:
歩骤 202: IMS Core将该点播消息路由给 SCF。
歩骤 203: SCF根据点播消息获取 UE的签约数据, 根据签约数据对点播 消息中携带的内容标识进行访问权限验证, 删除不具有访问权限的内容标识。 或者 SCF根据签约数据获取 UE具有访问权限的所有内容标识。
歩骤 204: SCF将点播消息路由至与当前点播内容标识 (当前点播的内容 标识) 对应的 MF, 其中携带访问权限验证后的内容标识。
歩骤 205: MF解析该点播消息, 判断其中携带的期望点播内容标识是否 可以与当前点播内容标识重用媒体通道, 将可以重用的期望点播内容标识形 成内容标识列表。 或者在 UE具有访问权限的所有内容标识中确定可以重用当 前点播内容标识的媒体通道的内容标识, 形成内容标识列表。 即若点播消息 中仅携带当前点播内容标识, 则该内容标识列表中的内容标识是在 UE具有访 问权限的所有内容标识中确定的; 或者, 若点播消息中携带的内容标识包括 当前点播内容标识和期望点播内容标识, 则该内容标识列表中的内容标识可 以是在 UE具有访问权限的所有内容标识中确定的, 或者, 只在期望点播内容 标识中确定的。 歩骤 206-208: MF通过与点播请求对应的响应 (200 0K) 向 UE返回该内 容标识列表。
其中该响应中携带的内容标识列表中的内容标识的方式可以通过 SIP头 域方式、 SDP描述方式、 XML描述方式, 具体可参见歩骤 21中描述的携带方 式。
该内容标识列表中的内容标识可以采用的格式为: SIP URL格式或者 RTS P URL格式或者 ContentID格式。
歩骤 209: UE获取该内容标识列表。
歩骤 210: UE和 MF建立媒体通道, 通过该媒体通道传输与当前点播内容 标识对应的当前点播内容。 该媒体通道可以为媒体控制通道和 /或媒体交付通 道。
歩骤 211: UE需要进行快速内容切换时, 选取位于内容标识列表中的切 换内容标识, 向 MF发送携带该切换内容标识的切换消息。
其中, 切换消息可以为实时流协议(Real Time Streaming Protocol, R TSP) 消息或 SIP消息。 对于 RTSP消息, 切换内容标识可以通过 Request UR I或 RTSP头域携带; 若切换内容标识通过 Request URI携带, 具体为: RTSP URL/?switch=ContentID, 或者, RTSP URL /?switch=SIP URI , 或者, 直接 在 Request URI中填入 RTSP URL; 或者, 切换内容标识通过扩展的 RTSP头域 携带。
歩骤 212: MF获取切换内容标识, 向 UE返回相应的响应 (200 0K) , 并 根据切换内容标识定位新的媒体位置, 以获取与切换内容标识对应的内容。
歩骤 213: MF重用根据当前点播内容标识建立的媒体通道, 通过该媒体 通道向 UE发送切换后的内容。
本实施例中点播消息中可以只携带当前点播的内容标识, 还可以携带当 前点播的内容标识及一个或多个后续期望点播的内容标识; 由 MF确定可重用 媒体通道的内容标识, 该内容标识可以在期望点播的内容标识中确定, 还可 以在 UE具有访问权限的所有内容标识中确定; 并通过与点播消息对应的响应 下发, 并且内容标识的携带方式、 采用格式具有多样化。 通过本实施例可以 重用媒体通道, 节约网络资源, 加快切换速度, 同时可以应用到不同场景。
图 3 为本发明点播业务中内容切换的方法实施例三的流程示意图, 与实 施例二不同的是, 本实施例中确定重用媒体通道的执行主体为 SCF, 即用下述 的歩骤 303-305替代歩骤 203-205, 其余歩骤与实施例二相同:
歩骤 303 : SCF根据点播消息获取 UE的签约数据, 根据签约数据获取 UE 具有访问权限的所有内容标识。 然后, 根据具有访问权限的所有内容标识中 确定出可以重用与当前点播内容标识对应的媒体通道的内容标识, 形成内容 标识列表; 或者, 在点播消息中携带的期望点播内容标识中确定具有访问权 限且可以重用与当前点播内容标识对应的媒体通道的内容标识, 形成内容标 识列表。
歩骤 304: SCF将点播消息路由至与当前点播内容标识对应的 MF, 其中携 带内容标识列表。
歩骤 305 : MF解析该点播消息, 将该内容标识列表发送给 UE, 或者对该 内容标识列表中的内容标识进行验证, 验证其是否可以重用与当前点播内容 标识对应的媒体通道, 得到验证通过的内容标识列表。
本实施例是 SCF确定出内容标识列表后发送给 MF, 由 MF转发给 UE, 可 替代的是 SCF确定出内容标识列表后直接发送给 UE, 无需 MF转发。
本实施例中点播消息中可以只携带当前点播的内容标识, 还可以携带当 前点播的内容标识及一个或多个后续期望点播的内容标识; 由 SCF确定可重 用媒体通道的内容标识, 该内容标识可以在期望点播的内容标识中确定, 还 可以在 UE具有访问权限的所有内容标识中确定; 并通过与点播请求对应的响 应携带该内容标识列表下发, 并且内容标识的携带方式、 采用格式具有多样 化。 通过本实施例可以重用媒体通道, 节约网络资源, 加快切换速度, 同时 可以应用到不同场景。 图 4为本发明点播业务中内容切换的方法实施例四的流程示意图, 与实 施例二、 三通过与点播消息对应的响应返回内容标识列表不同的是, 本实施 例中是通过该新发起的消息携带内容标识列表向 UE返回。 该实施例包括: 歩骤 41 : 网络侧设备获取内容标识列表, 该内容标识列表中的内容标识 可以重用与当前点播内容标识对应的媒体通道。 该内容标识列表的获取可以 采用实施例二所示的由 MF确定, 或者可以采用实施例三所示的由 SCF确定, 或者可以采用 MF、 SCF共同确定的方式。 具体流程可以参照实施例二或三, 在此不再赘述。
歩骤 42: 网络侧通过新发起的消息发送该内容标识列表。 新发起的消息 可以为 SIP Notify消息或 Info消息或 Message消息, 携带的方式可以为如 实施例二所示的 SIP头域方式或 SDP描述方式或 XML方式。 内容标识列表中 的内容标识采用的格式可以为如实施例二所示的 ContentID格式或 SIP URL 格式或 RTSP URL格式。 网络侧下发该内容标识列表的实体可以为 SCF也可以 为 MF。
歩骤 43: UE获取该内容标识列表。
歩骤 44: UE与网络侧设备根据当前点播内容标识建立媒体通道, 通过该 媒体通道传输与当前点播内容标识对应的内容。
该歩骤与前述的歩骤 41、 42、 43无先后顺序, 可以先 UE获取内容标识 列表、 再建立媒体通道, 或者先建立媒体通道, 后 UE获取内容标识, 或者两 者同时进行。
歩骤 45: UE发起切换消息,携带位于该内容标识列表中的切换内容标识。 歩骤 46: UE接收相应的响应 200 OK o
歩骤 47: UE接收与切换内容标识对应的内容, 切换后的内容通过上述的 媒体通道传输。
本实施例中点播请求中可以只携带当前点播的内容标识, 还可以携带当 前点播的内容标识及后续期望点播的内容标识; 由网络侧设备确定可重用媒 体通道的内容标识, 该内容标识可以在期望点播的内容标识中确定, 还可以 在 UE具有访问权限的所有内容标识中确定; 通过新发起的消息携带该内容标 识列表, 并且内容标识的携带方式、 采用格式具有多样化。 通过本实施例可 以重用媒体通道, 节约网络资源, 加快切换速度, 同时可以应用到不同场景。
图 5 为本发明点播业务中内容切换的方法实施例五的流程示意图, 该实 施例包括:
歩骤 51 : UE与 MF建立与当前点播内容标识对应的媒体通道, 向 UE发送 当前点播内容。 具体实现可参照上述实施例中播放当前点播内容的实现流程: UE向 SCF发送携带当前点播内容标识的点播消息, SCF将该点播消息转发给 与该当前点播内容标识对应的 MF, 协商建立与当前点播内容标识对应的媒体 通道, 由 MF通过该媒体通道向 UE发送与当前点播内容标识对应的当前点播 内容。
歩骤 52 : UE向 SCF发送 UE配置的播放列表。 该播放列表中包括一个或 多个期望点播内容标识, 播放列表可以通过 HTTP消息或 SIP消息或 Ut接口 会话外配置。
其中, 歩骤 51、 52没有时间先后限制, 可以先实现播放当前点播内容, 后获取播放列表, 或者, 先获取播放列表, 后播放当前点播内容, 或者, 在 U E向 SCF发送点播消息时同时携带该播放列表。
歩骤 53 : SCF返回 200 OKo
歩骤 54: 网络侧设备在所述播放列表中确定能够重用与所述当前点播内 容标识对应的媒体通道的切换内容标识, 由所述切换内容标识组成内容标识 列表。 其中确定内容标识列表的网络侧设备可以为 SCF或者 MF, 具体可参见 上述实施例。
歩骤 55 : 网络侧设备感知到切换, 如当前点播内容播放完毕或者网络侧 需要主动发送新的内容。
歩骤 56: MF 自行通过与上述已经建立的媒体通道向 UE发送与切换内容 标识对应的内容, 该切换内容标识根据预先存储的播放列表得到的, 实现内 容切换。
本实施例中, UE预先向网络侧存储播放列表, 网络侧设备根据该播放列 表确定出可以重用媒体通道的内容标识列表后,不将该内容标识列表发送给 U E, 而是在网络侧设备感知到切换后自行进行内容切换。
图 6 为本发明点播业务中内容切换的方法实施例六的流程示意图, 与实 施例二、 三, 四通过与消息直接返回内容标识列表至 UE不同的是, 本实施例 中是通过提供业务选择的服务器 SSF (Sevice Select Function, 业务选择功 能实体)向 UE提供播放列表, 其中所述的播放列表可以一次全部下发给 UE, 也可以分批分次提供给 UE。 该实施例包括:
歩骤 61 : 网络侧设备获取内容标识列表。 其中, 该内容标识列表中的内 容标识可以重用与当前点播内容标识对应的媒体通道。 该内容标识列表的获 取可以采用实施例二所示的由 MF确定, 或者可以采用实施例三所示的由 SCF 确定, 或者可以采用 MF、 SCF共同确定的方式。 具体流程可以参照实施例二 或三, 在此不再赘述。
歩骤 62: 将歩骤 61中所获取的内容标识列表传送至 SSF。 该下发方式可 以通过新起的消息或是消息的响应携带, 可以但不限于为头域或是消息体。 内容标识列表中的内容标识采用的格式可以为如实施例二所示的 ContentID 格式或 SIP URL格式或 RTSP URL格式。
歩骤 63: UE与 SSF交互获取所述的内容标识列表, 可以使用 HTTP等其 它的消息。 本实施例以 EPG展示的方式为例, 即 SSF将上述的内容列表以 EP G的形式呈现至 UE, 可以一次全部提供, 也可以 UE分次分批地从 SSF上查询 获取。
歩骤 64: UE发起点播请求, 该点播请求中携带当前点播的内容标识, 根 据当前点播内容标识与网络侧设备建立媒体通道, 并通过该媒体通道传送与 当前点播内容标识所对应的节目内容。 该歩骤与前述的歩骤 61、 62、 63无先后顺序, 可以先 UE获取内容标识 列表、 再发起点播请求, 建立当前点播内容标识对应的内容的媒体通道, 或 者先发起点播请求, 建立当前点播内容标识对应的内容的媒体通道, 而后 UE 再获取内容标识; 或者两个流程同时进行。
歩骤 65 : UE发起携带切换内容标识的切换消息。 该切换内容标识是从 E
PG中获得的内容标识列表中的支持重用通道的切换内容标识。 该切换消息可 以为 SIP消息或是 RTSP消息。
歩骤 66: UE接收相应的响应 200 OKo
歩骤 67: UE接收与切换内容标识对应的内容, 切换后的内容通过上述的 媒体通道传输。
本实施例中歩骤 64的点播请求中可以只携带当前点播的内容标识, 还可 以携带当前点播的内容标识及后续期望点播的内容标识; 由网络侧设备确定 可重用媒体通道的内容标识, 该内容标识可以在期望点播的内容标识中确定, 还可以在 UE具有访问权限的所有内容标识中确定; 通过新发起的消息或之前 消息的响应来携带该内容标识列表, 并且内容标识的携带方式、 采用格式具 有多样化。 通过本实施例可以重用媒体通道, 节约网络资源, 加快切换速度, 同时可以应用到不同场景。
图 7 为本发明点播业务中内容切换的方法实施例七的流程示意图, 与实 施例五不同的是在歩骤 55和歩骤 56增加下面的歩骤 71-74。
歩骤 71 : MF向 UE发送通知消息, 通知 UE进行内容切换, 该通知消息中 携带切换内容标识。
歩骤 72 : UE向 MF返回 200 0Κ。
歩骤 73 : UE向 MF发送切换消息。
歩骤 74: MF向 UE返回 200 0Κ。 本实施例中, UE预先向网络侧存储播放 列表, 网络侧设备根据该播放列表确定出可以重用媒体通道的内容标识列表 后, 不将该内容标识列表发送给 UE, 而是在网络侧设备感知到切换后, 通知 UE进行内容切换, 在接收到 UE的切换消息后进行内容切换。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分歩骤 可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读 取存储介质中, 该程序在执行时, 执行包括上述方法实施例的歩骤; 而前述 的存储介质包括: R0M、 RAM, 磁碟或者光盘等各种可以存储程序代码的介质。
图 8 为本发明点播业务中切换内容的装置实施例一的结构示意图, 该实 施例包括接收模块 81、 确定模块 82和切换模块 83。 接收模块 81用于接收 U E发送的当前点播内容标识; 确定模块 82用于确定能够重用与所述当前点播 内容标识对应的媒体通道的内容标识列表; 切换模块 83用于根据所述内容标 识列表进行内容切换。
其中, 当前点播内容标识可以通过点播消息携带, 该点播消息中可以携 带的内容标识可以为当前点播的内容标识或当前点播的内容标识和期望点播 的内容标识。 内容标识列表中的内容标识可以为在期望点播内容标识中确定 的, 或者为在所有具有访问权限的内容标识中确定的。 内容标识列表可以通 过与点播消息对应的响应或新发起的消息携带下发。 点播消息中或内容标识 列表中携带内容标识的方式可以为 SIP头域方式或 SDP描述方式或 XML描述 方式, 内容标识的格式可以为 SIP URL格式或者 RTSP URL格式或者 Content ID格式。
其中, 该实施例中还可以包括建立模块, 切换模块 83可以具体包括信息 模块; 建立模块用于根据所述当前点播内容标识建立与所述用户设备之间的 媒体通道, 通过所述媒体通道向所述用户设备发送与所述当前点播内容标识 对应的内容; 信息模块用于接收所述用户设备的切换信息, 确定切换内容标 识, 所述切换内容标识位于所述内容标识列表中; 建立模块还用于通过所述 媒体通道向所述用户设备发送与所述切换内容标识对应的内容。
本实施例通过确定内容标识列表, 可以直接重用该媒体通道, 节约网络 资源、 加快切换速度。 图 9 为本发明点播业务中切换内容的装置实施例二的结构示意图, 该实 施例包括接收模块 91、 确定模块 92、 切换模块 93和建立模块 94, 其中, 切 换模块 93包括信息模块 931, 还包括发送模块 932。 接收模块 91用于接收 U E发送的点播消息, 所述点播消息中携带当前点播内容标识; 确定模块 92用 于确定能够重用与所述当前点播内容标识对应的媒体通道的内容标识列表; 发送模块 932用于将所述内容标识列表发送给 UE;建立模块 94用于根据所述 当前点播内容标识建立与所述用户设备之间的媒体通道, 通过所述媒体通道 向所述用户设备发送与所述当前点播内容标识对应的内容; 信息模块 931用 于接收所述用户设备发送的切换消息, 所述切换消息中携带所述切换内容标 识; 建立模块 94还用于通过所述媒体通道向所述用户设备发送与所述切换内 容标识对应的内容。
本实施例通过确定模块确定出可以重用媒体通道的内容标识, 使得在 UE 发起新的携带位于该内容标识列表中的内容标识的切换消息后, 可以直接重 用该媒体通道, 节约网络资源、 加快切换速度。
图 10为本发明点播业务中切换内容的装置实施例三的结构示意图, 该实 施例包括接收模块 101、 确定模块 102、 切换模块 103和建立模块 104, 其中, 切换模块 103包括信息模块 1031。接收模块 101用于接收 UE发送的点播消息, 所述点播消息中携带当前点播内容标识。 信息模块 1031用于获取所述用户设 备配置的播放列表; 确定模块 102 具体用于在所述播放列表中确定能够重用 与所述当前点播内容标识对应的媒体通道的切换内容标识, 所述内容标识列 表包括所述切换内容标识。 建立模块 104用于根据所述当前点播内容标识与 所述用户设备建立媒体通道, 通过所述媒体通道向所述用户设备发送与所述 当前点播内容标识对应的内容; 并在网络侧感知切换后, 用于通过所述媒体 通道向所述用户设备发送与所述切换内容标识对应的内容。
本实施例中, UE 向网络侧预先存储播放列表, 网络侧设备在该播放列表 中确定出可以重用媒体通道的内容标识列表。 并且, 网络侧设备不向 UE发送 内容标识列表, 而是在网络侧感知切换后直接切换内容。 因此不仅可以直接 重用该媒体通道, 节约网络资源、 加快切换速度, 还可以节省流程。
图 11为本发明点播业务中切换内容的装置实施例四的结构示意图, 该实 施例包括接收模块 111、 确定模块 112、 切换模块 113和建立模块 114, 其中 切换模块包括信息模块 1131, 还包括通知模块 1132。 接收模块 111用于接收 UE发送的点播消息, 所述点播消息中携带当前点播内容标识; 信息模块 1131 用于获取所述用户设备配置的播放列表。 确定模块 112 具体用于在所述播放 列表中确定能够重用与所述当前点播内容标识对应的媒体通道的切换内容标 识, 所述内容标识列表包括所述切换内容标识。 通知模块 1132用于在网络侧 感知切换时, 向 UE发送携带切换内容标识的通知消息, 通知 UE进行内容切 换。 建立模块 114用于根据所述当前点播内容标识与所述用户设备建立媒体 通道, 通过所述媒体通道向所述用户设备发送与所述当前点播内容标识对应 的内容; 并用于在信息模块 1131接收到用户设备发送的切换消息后, 通过所 述媒体通道向所述用户设备发送与所述切换内容标识对应的内容。
本实施例中, UE 向网络侧预先存储播放列表, 网络侧设备在该播放列表 中确定出可以重用媒体通道的内容标识列表。 并且, 网络侧设备不向 UE发送 内容标识列表, 而是在网络侧感知切换后通知 UE进行内容切换, 在接收到 U E同意切换的切换请求后直接切换内容。 因此不仅可以直接重用该媒体通道, 节约网络资源、 加快切换速度, 还可以节省流程。
图 12为本发明点播业务中内容切换的系统实施例一的结构示意图, 该实 施例包括: 第一 SCF121和第一 MF122; 第一 SCF121用于接收 UE发送的当前 点播内容标识; 第一 MF122用于确定能够重用与所述当前点播内容标识对应 的媒体通道的内容标识列表; 并根据所述内容标识列表进行内容切换。
其中, 第一 MF122还用于与 UE建立与所述当前点播内容标识对应的媒体 通道, 通过所述媒体通道发送与所述当前点播内容标识对应的内容; 还用于 接收用户设备的切换信息, 确定切换内容标识, 所述切换内容标识位于所述 内容标识列表中; 还用于通过所述媒体通道发送与所述切换内容标识对应的 内容。
具体的, 第一 MF122用于将所述内容标识列表发送给 UE, 用于接收 UE发 送的携带切换内容标识的切换消息, 所述切换内容标识位于所述内容标识列 表中。 因此, 第一 MF可以重用媒体通道向 UE发送与切换内容标识对应的内 或者, 具体的, 第一 SCF121用于接收 UE的播放列表; 第一 MF122用于 在所述播放列表中确定切换内容标识, 这些切换内容标识组成内容标识列表。 因此, 第一 MF122在感知切换时, 如当前点播的内容结束或需要主动发送新 的内容, 可以自行重用媒体通道向 UE发送与切换内容标识对应的内容。
或者, 第一 MF122还用于向 UE发送携带切换内容标识的通知消息, 具体 用于在接收到 UE发送的切换消息后, 通过所述媒体通道发送与所述切换内容 标识对应的内容。 即第一 MF122在感知切换时, 通知 UE进行切换, 在接收到 UE的切换消息后进行内容切换。
其中, 可以通过点播消息携带内容标识, 内容标识可以为当前点播的内 容标识或当前点播的内容标识和期望点播的内容标识。 内容标识列表中的内 容标识可以为在期望点播内容标识中确定的, 或者为在所有具有访问权限的 内容标识中确定的。 内容标识列表可以通过与点播消息对应的响应或新的消 息携带。 点播消息中或内容标识列表中携带内容标识的方式可以为 SIP头域 方式或 SDP描述方式或 XML描述方式, 内容标识的格式可以为 SIP URL格式 或者 RTSP URL格式或者 Content ID格式。
本实施例通过 MF确定内容标识列表, 该内容标识列表中的内容标识可以 重用与当前点播内容标识对应的媒体通道, 使得网络侧设备根据切换内容标 识发送相应的内容时, 可以直接重用该媒体通道, 节约网络资源、 加快切换 速度。 同时 MF确定出内容标识列表后, 可以将该内容标识列表发送给 UE, 在 UE发送切换消息后进行内容切换; 还可以不将内容标识列表发送给 UE, 在感 知切换后自行进行内容切换, 还可以不将内容标识列表发送给 UE , 在感知切 换后通知 UE进行切换, 接收到 UE的切换消息后进行内容切换。
图 13为本发明点播业务中内容切换的系统实施例二的结构示意图, 该实 施例包括第二 SCF131和第二 MF132 , 第二 SCF131用于接收 UE发送的当前点 播内容标识; 还用于确定能够重用与所述当前点播内容标识对应的媒体通道 的内容标识列表; 第二 MF132用于根据所述内容标识列表进行内容切换。
其中, 第二 MF132还用于与 UE建立与所述当前点播内容标识对应的媒体 通道, 通过所述媒体通道发送与所述当前点播内容标识对应的内容; 还用于 接收 UE的切换信息, 确定切换内容标识, 所述切换内容标识位于所述内容标 识列表中; 还用于通过所述媒体通道发送与所述切换内容标识对应的内容。
具体的, 第二 SCF131用于将所述内容标识列表直接发送给 UE; 或者第二 SCF131用于将所述内容标识列表发送给第二 MF132 , 第二 MF132用于将所述 内容标识列表转发给 UE;第二 MF132还用于接收 UE发送的携带切换内容标识 的切换消息, 所述切换内容标识位于所述内容标识列表中。
或者, 具体的, 第二 SCF131用于在接收的 UE的播放列表中确定切换内 容标识, 该切换内容标识位于内容标识列表中。
或者, 第二 MF132还用于向 UE发送携带切换内容标识的通知消息, 具体 用于在接收到 UE发送的切换消息后, 通过所述媒体通道发送与所述切换内容 标识对应的内容。
本实施例通过 SCF确定内容标识列表, 该内容标识列表中的切换内容标 识可以重用与当前点播内容标识对应的媒体通道, 使得网络侧设备根据切换 内容标识发送相应的内容时, 可以直接重用该媒体通道, 节约网络资源、 加 快切换速度。 同时 SCF确定出内容标识列表后, 可以将该内容标识列表发送 给 UE, 在 UE发送切换消息后进行内容切换, 发送给 UE时, 可以由 SCF直接 发送给 UE, 还可以由 SCF发送给 MF, 再经 MF转发给 UE; 还可以不将内容标 识列表发送给 UE, 在感知切换后自行进行内容切换, 还可以不将内容标识列 表发送给 UE, 在感知切换后通知 UE进行切换, 接收到 UE的切换消息后进行 内容切换。
最后应说明的是: 以上实施例仅用以说明本发明的技术方案而非对其进 行限制, 尽管参照较佳实施例对本发明进行了详细的说明, 本领域的普通技 术人员应当理解: 其依然可以对本发明的技术方案进行修改或者等同替换, 而这些修改或者等同替换亦不能使修改后的技术方案脱离本发明技术方案的 精神和范围。

Claims

权 利 要 求 书
1、 一种点播业务中内容切换的方法, 其特征在于, 包括:
接收用户设备发送的当前点播内容标识;
确定能够重用与所述当前点播内容标识对应的媒体通道的内容标识列 表;
根据所述内容标识列表进行内容切换。
2、 根据权利要求 1所述的方法, 其特征在于, 还包括: 根据所述当前点 播内容标识与所述用户设备建立媒体通道, 通过所述媒体通道向所述用户设 备发送与所述当前点播内容标识对应的内容。
3、 根据权利要求 1所述的方法, 其特征在于, 根据所述内容标识列表进 行内容切换包括:
接收所述用户设备的切换信息, 确定切换内容标识, 所述切换内容标识 位于所述内容标识列表中;
通过所述媒体通道向所述用户设备发送与所述切换内容标识对应的内
4、 根据权利要求 1所述的方法, 其特征在于, 根据所述内容标识列表进 行内容切换之前还包括:
将所述内容标识列表发送给所述用户设备。
5、 根据权利要求 4所述的方法, 其特征在于, 将所述内容标识列表发送 给所述用户设备进一歩包括:
通过业务选择功能实体下发所述的内容标识列表至所述用户设备。
6、 根据权利要求 1或 3所述的方法, 其特征在于, 所述确定能够重用与 所述当前点播内容标识对应的媒体通道的内容标识列表包括:
获取用户设备的播放列表 ·'
在所述播放列表中确定能够重用与所述当前点播内容标识对应的媒体通 道的切换内容标识, 由所述切换内容标识组成内容标识列表。
7、 根据权利要求 6所述的方法, 其特征在于, 根据所述内容标识列表进 行内容切换之前还包括:
向所述用户设备发送消息, 所述消息携带所述切换内容标识, 用于通知 用户进行内容切换。
8、 根据权利要求 1所述的方法, 其特征在于, 所述内容标识列表中的切 换内容标识对应的内容与当前点播内容标识对应的内容位于同一个媒体功能 实体, 所述内容标识列表中的切换内容标识对应的内容与当前点播内容标识 对应的内容占用相同的带宽, 或所述内容标识列表中的切换内容标识对应的 内容占用的带宽小于当前点播内容占用的带宽中的一项或多项。
9、 根据权利要求 1所述的方法, 其特征在于: 所述当前点播内容标识携 带在点播消息中, 所述点播消息中还携带有期望点播内容标识。
10、 根据权利要求 9所述的方法, 其特征在于: 所述内容标识列表中的 内容标识为所述期望点播内容标识中支持重用媒体通道的内容标识。
11、 根据权利要求 4或 7所述的方法, 其特征在于: 所述当前点播内容 标识携带在点播消息中, 通过与所述点播消息对应的响应消息携带所述内容 标识列表发送给所述用户设备, 或者通过发起消息携带所述内容标识列表发 送给所述用户设备。
12、 根据权利要求 11所述的方法, 其特征在于: 所述携带内容标识列表 的方式包括: SIP头域方式或会话描述协议 SDP描述方式或扩展可标识语言 X
ML消息体方式。
13、 一种点播业务中内容切换的装置, 其特征在于, 包括:
接收模块, 用于接收用户设备发送的当前点播内容标识;
确定模块, 用于确定能够重用与所述当前点播内容标识对应的媒体通道 的内容标识列表;
切换模块, 用于根据所述内容标识列表进行内容切换。
14、 根据权利要求 13所述的装置, 其特征在于, 还包括: 建立模块, 用 于根据所述当前点播内容标识建立与所述用户设备之间的媒体通道, 通过所 述媒体通道向所述用户设备发送与所述当前点播内容标识对应的内容。
15、 根据权利要求 14所述的装置, 其特征在于:
所述切换模块包括信息模块, 所述信息模块用于接收所述用户设备的切 换信息, 确定切换内容标识, 所述切换内容标识位于所述内容标识列表中; 所述建立模块还用于通过所述媒体通道向所述用户设备发送与所述切换 内容标识对应的内容。
16、 根据权利要求 15所述的装置, 其特征在于:
所述切换模块还包括发送模块, 所述发送模块用于将所述内容标识列表 发送给所述用户设备;
所述信息模块具体用于接收所述用户设备发送的携带切换内容标识的切 换消息, 所述切换内容标识位于所述内容标识列表中。
17、 根据权利要求 15所述的装置, 其特征在于:
所述信息模块具体用于获取所述用户设备配置的播放列表;
所述确定模块具体用于在所述播放列表中确定能够重用与所述当前点播 内容标识对应的媒体通道的切换内容标识, 所述切换内容标识位于所述内容 标识列表中。
18、 根据权利要求 17所述的装置, 其特征在于:
所述切换模块还包括通知模块, 用于向所述用户设备发送通知用户进行 内容切换的通知消息, 所述通知消息携带所述切换内容标识;
所述信息模块还用于接收所述用户设备发送的切换消息。
19、 一种点播业务中内容切换的系统, 其特征在于, 包括:
第一业务控制功能实体, 用于接收用户设备发送的当前点播内容标识; 第一媒体功能实体, 用于确定能够重用与所述当前点播内容标识对应的 媒体通道的内容标识列表; 用于根据所述内容标识列表进行内容切换。
20、 根据权利要求 19所述的系统, 其特征在于: 所述第一媒体功能实体 还用于与所述用户设备建立与所述当前点播内容标识对应的媒体通道, 通过 所述媒体通道发送与所述当前点播内容标识对应的内容; 还用于接收用户设 备的切换信息, 确定切换内容标识, 所述切换内容标识位于所述内容标识列 表中; 还用于通过所述媒体通道发送与所述切换内容标识对应的内容。
21、 根据权利要求 20所述的系统, 其特征在于: 所述第一媒体功能实体 用于将所述内容标识列表发送给用户设备, 用于接收用户设备发送的携带切 换内容标识的切换消息。
22、 根据权利要求 20所述的系统, 其特征在于: 所述第一业务控制功能 实体用于接收用户设备的播放列表; 所述第一媒体功能实体用于在所述播放 列表中确定切换内容标识。
23、 根据权利要求 22所述的系统, 其特征在于: 所述第一媒体功能实体 还用于向用户设备发送携带切换内容标识的通知消息, 具体用于在接收到用 户设备发送的切换消息后, 通过所述媒体通道发送与所述切换内容标识对应 的内容。
24、 一种点播业务中内容切换的系统, 其特征在于, 包括:
第二业务控制功能实体, 用于接收用户设备发送的当前点播内容标识; 还用于确定能够重用与所述当前点播内容标识对应的媒体通道的内容标识列 表;
第二媒体功能实体, 用于根据所述内容标识列表进行内容切换。
25、 根据权利要求 24所述的系统, 其特征在于: 所述第二媒体功能实体 还用于与所述用户设备建立与所述当前点播内容标识对应的媒体通道, 通过 所述媒体通道发送与所述当前点播内容标识对应的内容; 还用于接收用户设 备的切换信息, 确定切换内容标识, 所述切换内容标识位于所述内容标识列 表中; 还用于通过所述媒体通道发送与所述切换内容标识对应的内容。
26、 根据权利要求 25所述的系统, 其特征在于: 所述第二业务控制功能 实体用于将所述内容标识列表直接发送给所述用户设备; 或者所述第二业务 控制功能实体用于将所述内容标识列表发送给所述第二媒体功能实体, 所述 第二媒体功能实体用于将所述内容标识列表转发给所述用户设备; 所述第二 媒体功能实体还用于接收用户设备发送的携带切换内容标识的切换消息。
27、 根据权利要求 25所述的系统, 其特征在于: 所述第二业务控制功能 实体用于在接收的用户设备的播放列表中确定切换内容标识。
28、 根据权利要求 27所述的系统, 其特征在于: 所述第二媒体功能实体 还用于向用户设备发送携带切换内容标识的通知消息, 具体用于在接收到用 户设备发送的切换消息后, 通过所述媒体通道发送与所述切换内容标识对应 的内容。
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