WO2010066082A1 - 移动电视网络间切换方法及装置 - Google Patents

移动电视网络间切换方法及装置 Download PDF

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Publication number
WO2010066082A1
WO2010066082A1 PCT/CN2008/073477 CN2008073477W WO2010066082A1 WO 2010066082 A1 WO2010066082 A1 WO 2010066082A1 CN 2008073477 W CN2008073477 W CN 2008073477W WO 2010066082 A1 WO2010066082 A1 WO 2010066082A1
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WO
WIPO (PCT)
Prior art keywords
service
mobile
network
propagation network
propagation
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/CN2008/073477
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English (en)
French (fr)
Inventor
朱庆
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.)
Nokia Shanghai Bell Co Ltd
Alcatel Lucent SAS
Original Assignee
Alcatel Lucent Shanghai Bell Co Ltd
Alcatel Lucent SAS
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Publication date
Application filed by Alcatel Lucent Shanghai Bell Co Ltd, Alcatel Lucent SAS filed Critical Alcatel Lucent Shanghai Bell Co Ltd
Priority to PCT/CN2008/073477 priority Critical patent/WO2010066082A1/zh
Priority to US13/145,022 priority patent/US20110283327A1/en
Priority to CN200880130194XA priority patent/CN102084713A/zh
Priority to EP08878682A priority patent/EP2378830A4/en
Priority to KR1020117016176A priority patent/KR20110096069A/ko
Publication of WO2010066082A1 publication Critical patent/WO2010066082A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/26—Arrangements for switching distribution systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management e.g. creating a master electronic programme guide from data received from the Internet and a Head-end or controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4622—Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6131—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a mobile phone network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/631—Multimode Transmission, e.g. transmitting basic layers and enhancement layers of the content over different transmission paths or transmitting with different error corrections, different keys or with different transmission protocols

Definitions

  • the present invention relates to a mobile television technology, and more particularly to a method and apparatus for switching a mobile television terminal between different propagation networks. Background technique
  • Mobile TV combines two products, mobile terminals such as TVs and mobile phones.
  • the TV business is expected to be one of the main drivers of the demand for a new generation of mobile phones, as many consumers want to integrate all communication and entertainment functions into the same device.
  • Sending small video files or streaming content (such as TV shows) to a single or multiple mobile phone users via a mobile cellular network can achieve higher average user revenue, but if there are too many users in a certain area, it may cause mobile Cellular networks degrade when unicast traffic demand is high.
  • the broadcast service uses an independent radio broadcast network to transmit television content. Each user can receive and play the same content through a mobile phone that supports the broadcast function without affecting the operator's network capacity.
  • Each method has its own advantages and disadvantages. Integrating different ways can bring the best experience to consumers and bring more revenue opportunities to operators. Therefore, mobile TV terminals that are compatible with multiple wireless networks will also be A future direction of development.
  • the advantage of a dedicated broadcast network is that the outdoor coverage area is large and the cost is low, and the mobile cellular network has advantages in indoor environments, especially in places such as subways, tunnels or elevators.
  • the usage environment of the mobile TV terminal user changes, for example, when the user moves from the dedicated broadcast network coverage area to a place other than the area, the program content being received will be interrupted. Therefore, it is not enough to make the mobile TV terminal have a function compatible with a plurality of wireless networks.
  • One of the objects of the present invention is to provide a method and apparatus for enabling a mobile television terminal to achieve approximately seamless handover between different wireless networks.
  • a method for causing a mobile television terminal to switch between a first and a second propagation network in accordance with the present invention includes the steps of:
  • the first propagation network After receiving the play request of the mobile TV terminal, allowing the first propagation network to send corresponding service key information to the mobile TV terminal, so that the service can be received and played through the first propagation network.
  • An apparatus for a mobile television terminal to switch between a first and a second propagation network includes:
  • a real-time encoder configured to synchronously transmit the same content service to the first and second propagation networks, so that the service can be synchronously propagated
  • a central service ordering unit configured to allow the first propagation network to send corresponding service key information to the mobile television terminal after receiving the play request of the mobile television terminal, so that the first mobile network can pass the first propagation network Receiving and playing the service, and allowing the second propagation network to transmit corresponding business critical information to the mobile
  • the television terminal is operative to continue to receive and play the service through the second propagation network.
  • a method for a mobile television terminal to switch between a first and a second propagation network includes the steps of:
  • step b receiving and playing the corresponding service transmitted by the first propagation network according to the service key information described in step a;
  • the mobile TV network switching method and device of the present invention can synchronously play the same content service on different networks, and in the process of receiving and playing the mobile TV terminal, if the movement between the networks occurs, Triggering it to switch to the current network to continue receiving and playing the service, so that the user can obtain the pseudo seamless handover experience, thereby providing more flexible multi-network compatibility and expanding the application range of the mobile TV service.
  • Figure 1 shows a basic network structure of an embodiment of the present invention
  • Figure 2 illustrates a data model of the present invention for switching services
  • Figure 3 illustrates an embodiment of a mobile terminal moving between different network coverage areas in the basic network structure of Figure 1.
  • FIG. 1 The basic network structure of an embodiment of the present invention can be referred to FIG.
  • the real-time encoder 301 is mainly used to encode the content of the program to be played, and send the same real-time data stream to different networks and ensure that the data stream is synchronized on different networks.
  • the real-time encoder 301 simultaneously transmits the same data stream to the dedicated broadcast service center 210, the mobile broadcast service center 220, and the mobile interactive service center 230, and then through the broadcast channel of the private broadcast network 201 or the mobile broadcast network 202. Or the unicast channel of the mobile interactive network 203 is sent to the mobile terminal 100.
  • the data stream can be encrypted by the corresponding network before being sent to the mobile terminal 100.
  • the central service navigation unit 302 is configured to generate unified service navigation metadata including all access information related to a certain service, and the service can support the mobile terminal 100 to receive and switch in real time between different networks.
  • the central service navigation unit 302 transmits the unified service navigation information to the dedicated broadcast service center 210, the mobile broadcast service center 220, and the mobile interactive service center 230, and then transmits the data to the mobile terminal 100 via a broadcast or unicast channel.
  • the data model used to support seamless switching services can be represented by Figure 2, which is also an integral part of the business navigation data model.
  • the service fragment describes the information that contains a video service from a collective level.
  • the video service can be sent to users through multiple access methods, such as a dedicated broadcast channel, a mobile broadcast channel, and a mobile interactive channel. All access methods are capable of transmitting the same data stream synchronously, so that when the mobile terminal 100 switches between the two network coverage areas, its users can view the corresponding program content approximately seamlessly (without interruption).
  • the dedicated broadcast access segment in the data model of Figure 2 describes how the service is accessed through the private broadcast network 201 during the duration of the service.
  • This data segment contains the corresponding session description information or access parameters and indicates Distributed party Law.
  • the mobile broadcast access segment describes how the service is accessed through the mobile broadcast network 202 during the duration of the service.
  • This data segment also contains corresponding session description information or access parameters and indicates the method of distribution.
  • the mobile interactive access segment describes how the service is accessed through the mobile interactive network 203 during the duration of the service. This data segment also contains corresponding session description information or access parameters, and indicates the method of distribution.
  • the three types of access segment data provide relevant information for the performance of receiving and playing the corresponding service, and provide related information.
  • the above data model can also use appropriate priority parameters to guide the mobile terminal when the two network coverage overlapping areas are selected.
  • the central service ordering unit 303 in the basic network structure of Fig. 1 is used to maintain subscribers' subscription information for various services, and provides centralized authentication and authorization to each network's service center. The user can then subscribe to the corresponding service via an interactive network or other user management system and synchronize the order information to the central service ordering unit 303.
  • the dedicated broadcast service center 210 includes a content broadcast unit 211, a service navigation broadcast unit 212, and an access control unit 213.
  • the content broadcast unit 211 receives the real-time data stream from the real-time encoder 301, encrypts and multiplexes it, and transmits the mixed data stream to the private broadcast network 201 for data distribution.
  • the service navigation broadcast unit 212 receives the service navigation information from the central service navigation unit 302 and configures the distribution of the service navigation information on the dedicated broadcast channel.
  • the access control unit 213 checks the subscriber's subscription information with the central service subscription unit 303 and can transmit the service key information to the target user over the broadcast channel.
  • the mobile broadcast service center 220 includes a content broadcast unit 221, a service navigation broadcast unit 222, and an access control unit 223.
  • the content broadcast unit 221 also receives the real-time data stream from the real-time encoder 301, allocates the radio resources, encrypts them, and transmits them to the mobile broadcast network 202 for data distribution.
  • the service navigation broadcast unit 222 receives the service navigation information from the central service navigation unit 302 and is in the mobile broadcast. The distribution of service navigation information is configured on the multicast channel.
  • the access control unit 223 checks the subscription information of the user with the central service subscription unit 303 and can transmit the service key information to the target user through the mobile interaction channel.
  • the mobile interactive service center 230 includes a streaming server 231, a service navigation portal 232, and an access control unit 233.
  • the stream server 231 receives the real-time data stream from the real-time encoder 301 and transmits the data to the user in a unicast manner via the interactive channel based on user requirements.
  • the mobile interactive service center 230 receives the service navigation information from the central service navigation unit 302 and integrates the information into the service navigation portal 232.
  • the service navigation portal 232 feeds back its service navigation information according to the request of the mobile terminal 100.
  • the access control unit 233 checks the subscription information of the user with the central service ordering unit 303, and if the user subscribes to a certain service, allows the streaming server 231 to play the corresponding data.
  • the private broadcast network 201 provides a dedicated broadcast channel for service transmission, which can use existing DVB-H (Digital Video Broadcasting - Handheld), DVB-SH (Digital Video Broadcasting - Satellite to Handheld), T-DMB (Terrestrial Digital) Technical standards such as multimedia broadcasting), MediaFLO (media forward link) or CMMB (China Mobile Digital Multimedia Broadcasting).
  • DVB-H Digital Video Broadcasting - Handheld
  • DVB-SH Digital Video Broadcasting - Satellite to Handheld
  • T-DMB Transmissionrestrial Digital
  • multimedia broadcasting MediaFLO (media forward link)
  • CMMB China Mobile Digital Multimedia Broadcasting
  • the mobile broadcast network 202 provides a broadcast channel within the mobile cellular network, which may use 3GPP MBMS (3rd Generation Partnership Project - Multimedia Broadcast Multicast Service) or 3GPP2 BCMCS (3rd Generation Partnership Project 2 - Broadcast Multicast Service), etc. technical standard.
  • 3GPP MBMS 3rd Generation Partnership Project - Multimedia Broadcast Multicast Service
  • 3GPP2 BCMCS 3rd Generation Partnership Project 2 - Broadcast Multicast Service
  • the mobile interactive network 203 provides a two-way channel that can use technologies such as 3GPP (3rd Generation Partnership Project), 3GPP2 (3rd Generation Partnership Project 2), WiFi (or WLAN) or WiMAX (Worldwide Interoperability for Microwave Access) standard.
  • 3GPP 3rd Generation Partnership Project
  • 3GPP2 3rd Generation Partnership Project 2
  • WiFi or WLAN
  • WiMAX Worldwide Interoperability for Microwave Access
  • the mobile terminal 100 has the compatibility of multiple mobile TV networks, and can receive the service content played by the dedicated broadcast network 201, and can also receive the service content played by the mobile broadcast network 202 or the mobile interactive network 203. In addition, the mobile terminal 100 receives service navigation information from a broadcast or unicast network, depending on signal strength or network.
  • the specified rule selects the corresponding service network and triggers service switching between several different networks and application systems to provide the user with an approximately seamless or pseudo-seamless handover experience.
  • the elliptical area I shown in Fig. 3 represents the coverage of the private broadcast network 201
  • the elliptical area II represents the coverage of the mobile broadcast network 202
  • the elliptical area III represents the coverage of the mobile interactive network 203.
  • the mobile terminal 100 is initially within the coverage of the private broadcast network 201 and has obtained service navigation information.
  • the corresponding program content is output by the real-time encoder 301 and transmitted through the dedicated broadcast channel and the mobile broadcast channel, respectively.
  • the access control unit 213 in the dedicated broadcast service center 210 checks the subscriber's subscription information with the central service subscription unit 303. After receiving the confirmation from the central service ordering unit 303, the access control unit 213 will generate corresponding service key information and transmit it to the target user (i.e., the mobile terminal 100) through the broadcast channel.
  • the mobile terminal 100 decrypts and plays the program after receiving the broadcasted program and corresponding business key information within the coverage of the private broadcast network 201.
  • the mobile terminal 100 moves, and enters the dedicated broadcast network 201, the mobile broadcast network 202, and the mobile interactive network 203 to cover the overlapping areas, that is, the ellipse area I, the ellipse area II in FIG. The overlapping portion of the elliptical region III. During this process, the mobile terminal 100 continuously monitors the signal strength.
  • the signal strength of the mobile broadcast network 202 may be higher than the signal strength of the private broadcast network 201 for a period of time.
  • the mobile terminal 100 will check whether the previously obtained service navigation information includes the mobile broadcast network 202, and if so, the mobile terminal 100 will pass the interactive channel to the access control unit 223 in the mobile broadcast service center 220.
  • Request corresponding business critical information (such as business key information).
  • the incoming control unit 223 checks the subscription information of the user with the central service ordering unit 303. After obtaining the confirmation from the central service ordering unit 303, the access control unit 223 returns the corresponding service key information to the mobile terminal 100 through the interactive channel.
  • the mobile terminal 100 switches to receive the data stream from the mobile broadcast network 202 based on the service navigation information, and decrypts and plays it with the corresponding service key information. Since the content of the data stream played on different broadcast networks is synchronized, the user does not lose or interrupt the program being watched, and a similar seamless switching effect can be achieved in the use experience.
  • the mobile terminal 100 when the mobile terminal 100 continues to move and gradually leaves the coverage area of the mobile broadcast network 202, the mobile terminal 100 detects that the signal strength of the mobile broadcast network 202 becomes weaker and weaker, and Outside the mobile interactive network 203, there are no signals from other broadcast networks. At this time, the mobile terminal 100 transmits a service request to the access control unit 233 in the mobile interactive service center 230 via the interactive channel based on the service navigation information.
  • the access control unit 233 upon receiving the request from the mobile terminal 100, checks the subscription information of the user with the central service ordering unit 303. Upon receipt of the confirmation by the central service subscription unit 303, the access control unit 233 will return a service response and allow the mobile terminal 100 to play the corresponding data stream.
  • the mobile terminal 100 thereby establishes a connection with the mobile interactive service center 230 and switches to a video service based on the user request, i.e., an interactive service, to continue the playback of the program.
  • the mobile terminal 100 triggers network switching by monitoring the strength of the network signal, and therefore has the ability to monitor multiple network signals, such as the priority set by the system or the user. Choose which network to switch to first.
  • the manner of movement of the mobile terminal 100 is not limited to the situation shown in FIG. 3, such as when the mobile terminal 100 moves from the mobile interactive network 203 to the mobile broadcast network 202 or the private broadcast network 201, the mobile broadcast network 202 or a dedicated broadcast network. 201 may have previously learned the subscription status of the mobile terminal 100 and is in the broadcast channel. The key information to which the mobile terminal 100 is applied is transmitted. Therefore, when the mobile terminal 100 detects that the corresponding broadcast network signal reaches a certain strength, it can directly switch to the corresponding broadcast network to receive the service according to the preset priority rule, and no longer needs to be sent by the mobile terminal 100 to the corresponding broadcast network. Issue a switch request. Other specific switching procedures and principles are similar to the embodiment of FIG. 3 and therefore will not be described again.
  • the mobile TV network switching method and device of the present invention synchronizes the services of the same content on different networks, and when the mobile terminal receives and plays the service, if the movement between the networks occurs, no matter Whether moving from a broadcast network to a unicast network or from a unicast network to a broadcast network can trigger a switch to the current network to continue receiving and playing the service, so that the user can obtain a pseudo seamless handover experience, thereby providing more flexibility.
  • Multi-network compatibility expands the range of applications for mobile TV services.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Engineering & Computer Science (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Description

移动电视网络间切换方法及装置
技术领域
本发明涉及一种移动电视技术， 尤其涉及一种使移动电视终 端在不同传播网络之间进行切换的方法及装置。 背景技术
自 20世纪 40年代黑白广播电视问世以来， 电视已走过了一 个漫长的发展历程。 目前， 电视正在迎来它的另一个全新的发展 阶段： 移动电视。 移动电视将两种产品， 即电视与手机等移动终 端， 结合在一起。 电视业务将有望成为新一代移动电话需求的主 要推动因素之一， 因为许多消费者希望将通信和娱乐功能全部整 合在同一个设备中。
目前世界上存在多种移动电视标准， 通过不同的无线电网络 传播信号， 并以不同的业务传输方式进行内容发送， 比如可提供 单播或组播业务的移动蜂窝网络和提供广播业务的专用广播网 络。
通过移动蜂窝网络向单个或多个手机用户发送小型的视频文 件或流媒体内容 （如电视节目 ） ， 可实现更高的平均用户收入， 但若某一地区的用户过多时， 则有可能导致移动蜂窝网络在单播 业务需求量较高时性能下降。 而广播业务采用独立的无线电广播 网络来传输电视内容。 每个用户都能够通过支持广播功能的手机 接收并播放同样的内容， 而不会对运营商的网络容量造成影响。 每种方式各有其优点和缺点， 整合不同的方式能为消费者带来最 佳体验， 并为运营商带来更多创收机遇， 因此能够兼容多种无线 网络的移动电视终端也将会是未来的一个发展方向。
但是目前对于单一网络来说， 很难做到全面完整的网络覆盖， 比如专用广播网络的优势在于室外覆盖面积较大、 成本较低， 而 移动蜂窝网络在室内环境， 特别是像地铁、 隧道或电梯等场所的 覆盖更有优势。 当移动电视终端用户的使用环境发生变化时， 例 如当用户从专用广播网络覆盖区域移动到该区域以外的地方时， 正在接收的节目 内容将会被中断。 因此仅仅使移动电视终端具有 兼容多种无线网络的功能是不够的。 发明内容
本发明的目的之一是提出一种能够使移动电视终端在不同的 无线网络间实现近似无缝切换的方法及装置。
按照本发明的一种使移动电视终端在第一和第二传播网络间 进行切换的方法， 包括步骤：
a、 向所述第一和第二传播网络同步发送同一内容的业务， 使 其能够同步传播该业务；
b、 在收到所述移动电视终端的播放请求后， 允许所述第一传 播网络发送相应的业务关键信息给所述移动电视终端， 使其可通 过所述第一传播网络接收和播放该业务； 以及
c、 允许所述第二传播网络发送相应的业务关键信息给所述移 动电视终端， 使其可通过所述第二传播网络继续接收和播放该业 务。
按照本发明的一种用于移动电视终端在第一和第二传播网络 间进行切换的装置， 包括：
实时编码器， 用于向所述第一和第二传播网络同步发送同一 内容的业务， 使其能够同步传播该业务； 以及
中央业务订购单元， 用于在收到所述移动电视终端的播放请 求后， 允许所述第一传播网络发送相应的业务关键信息给所述移 动电视终端， 使其可通过所述第一传播网络接收和播放该业务， 以及允许所述第二传播网络发送相应的业务关键信息给所述移动 电视终端， 使其可通过所述第二传播网络继续接收和播放该业务。 按照本发明的又一种用于移动电视终端在第一和第二传播网 络间进行切换的方法， 包括步骤：
a、 通过所述第一传播网络发送一个业务播放请求， 并接收来 自该第一传播网络反馈的相应的业务关键信息；
b、 根据步骤 a中所述的业务关键信息， 接收和播放所述第一 传播网络所传播的相应业务；
c、 在该业务播放过程中， 监测第一和第二传播网络环境； d、 当第一和第二传播网络环境符合预定条件时， 接收来自该 第二传播网络反馈的相应的业务关键信息； 以及
e、 根据步骤 d中所述的业务关键信息， 接收和播放所述第二 传播网络所同步传播的同一业务。
由上可以看出， 本发明移动电视网络间切换方法和装置是通 过在不同网络上同步播放相同内容的业务， 在移动电视终端接收 和播放该业务过程中， 若发生网络间的移动时， 能够触发其切换 到当前网络继续接收和播放该业务， 使用户获得伪无缝切换的体 验， 从而提供了更加灵活的多网络兼容性， 扩大了移动电视业务 的应用范围。
通过参考以下结合附图的说明以及权利要求书中的内容， 并 且随着对本发明的更全面的理解， 本发明的其他目的及效果将变 得更加清楚和易于理解。 附图说明
现在结合附图对本发明进行更详细的描述， 其中：
图 1示出了本发明一个实施例的基本网络结构；
图 2示出了本发明用于切换业务的一种数据模型； 以及
图 3示出了在图 1 的基本网络结构中， 移动终端在不同网络 覆盖区域间发生移动时的一种实施例。 具体实施方式
本发明一个实施例的基本网络结构可以参照图 1所示。
其中， 实时编码器 301 主要用于对要播放的节目 内容进行编 码， 并将同样的实时数据流分别发送给不同的网络并保证该数据 流在不同网络上的传播保持同步。 在本实施例中， 实时编码器 301 把同一个数据流同时发送给专用广播业务中心 210、移动广播业务 中心 220和移动互动业务中心 230，再经过专用广播网络 201或者 移动广播网络 202的广播信道， 或者移动互动网络 203的单播信 道发送给移动终端 100。该数据流在发送给移动终端 100之前可由 相应的网络进行加密。
中央业务导航单元 302 用于生成统一的业务导航元数据， 其 中包括与某个业务有关的所有接入信息， 而且该业务可以支持移 动终端 100 在不同网络间实时切换地进行接收。 在本实施例中， 中央业务导航单元 302 将统一的业务导航信息发送给专用广播业 务中心 210、 移动广播业务中心 220和移动互动业务中心 230， 再 经过广播或者单播信道发送给移动终端 100。
用于支持无缝切换业务的数据模型可以通过图 2 来表示， 该 数据模型也是业务导航数据模型中的一个组成部分。
如图 2 所示， 其中业务片段是从集体层次上描述包含一个视 频业务的信息。 该视频业务可以通过多种接入方式发送给用户， 例如专用广播信道、 移动广播信道和移动互动信道。 而所有的接 入方式能够同步地发送相同的数据流， 以使得当移动终端 100 在 两个网络覆盖区域间切换时， 其用户可近似无缝地 （无间断地） 收看相应的节目 内容。
图 2 数据模型中的专用广播接入片段描述的是在业务持续期 间， 该业务如何通过专用广播网络 201 进行接入， 这个数据片段 中包含了相应的会话描述信息或者接入参数， 并指明了分发的方 法。 移动广播接入片段描述的是在业务持续期间， 该业务如何通 过移动广播网络 202 进行接入， 这个数据片段中同样包含了相应 的会话描述信息或者接入参数， 并指明了分发的方法。 移动互动 接入片段描述的是在业务持续期间， 该业务如何通过移动互动网 络 203 进行接入， 这个数据片段中也包含了相应的会话描述信息 或者接入参数， 并指明了分发的方法。
对于移动终端 100 来说， 这三种类型的接入片段数据为其接 收并播放相应的业务所需要具备哪些性能， 提供了相关的信息。 为了帮助更好地对接入网络进行选择， 前述数据模型中还可以使 用适当的优先级参数来对处于两个网络覆盖重叠区域时的移动终 端如何选择网络进行引导。
图 1基本网络结构中的中央业务订购单元 303是用来维护用 户对各种业务的订购信息， 并提供集中的鉴定和授权给每个网络 的业务中心。 用户则可以通过互动网络或者其他用户管理系统订 购相应的业务， 并将订购信息同步至中央业务订购单元 303。
专用广播业务中心 210包括内容广播单元 211、业务导航广播 单元 212和接入控制单元 213。 其中， 内容广播单元 211接收来自 实时编码器 301 的实时数据流， 对其进行加密、 多路复用处理并 将混合后的数据流发送给专用广播网络 201 进行数据分发。 业务 导航广播单元 212接收来自中央业务导航单元 302的业务导航信 息， 并在专用广播信道上配置业务导航信息的分发。 接入控制单 元 213向中央业务订购单元 303核对用户的订购信息并可通过广 播信道发送业务关键信息给目标用户。
移动广播业务中心 220包括内容广播单元 221、业务导航广播 单元 222和接入控制单元 223。 其中， 内容广播单元 221也接收来 自实时编码器 301 的实时数据流， 配置无线资源并进行加密后将 其发送给移动广播网络 202进行数据分发。业务导航广播单元 222 接收来自中央业务导航单元 302 的业务导航信息， 并在移动广播 多播信道上配置业务导航信息的分发。 接入控制单元 223 向中央 业务订购单元 303 核对用户的订购信息并可通过移动互动信道发 送业务关键信息给目标用户。
移动互动业务中心 230包括流服务器 231、 业务导航门户 232 和接入控制单元 233。 其中， 流服务器 231 接收来自实时编码器 301的实时数据流， 并基于用户要求、 经由互动信道以单播方式将 数据发送给用户。 移动互动业务中心 230接收来自中央业务导航 单元 302 的业务导航信息， 并将该信息集成到业务导航门户 232 中。 业务导航门户 232根据移动终端 100的请求反馈其业务导航 信息。 接入控制单元 233向中央业务订购单元 303核对用户的订 购信息， 如该用户订购了某项业务， 则允许流服务器 231 播放相 应数据。
专用广播网络 201 提供用于业务发送的专用广播信道， 其可 以使用现有的 DVB-H (数字视频广播-手持） 、 DVB-SH (数字视 频广播-卫星对手持）、 T-DMB(地面数字多媒体广播）、 MediaFLO (媒体前向链路） 或 CMMB (中国移动数字多媒体广播） 等技术 标准。
移动广播网络 202 在移动蜂窝网络内提供广播信道， 其可以 使用 3GPP MBMS (第三代合作伙伴计划-多媒体广播组播业务） 或 3GPP2 BCMCS (第三代合作伙伴计划 2-广播组播业务） 等技 术标准。
移动互动网络 203提供双向的信道， 其可以使用 3GPP (第三 代合作伙伴计划） 、 3GPP2 (第三代合作伙伴计划 2 ) 、 WiFi (或 无线局域网） 或 WiMAX (微波存取全球互通） 等技术标准。
移动终端 100 具有多移动电视网络的兼容性， 既可接收专用 广播网络 201所播放的业务内容，也可接收来自移动广播网络 202 或者移动互动网络 203 所播放的业务内容。 另外， 移动终端 100 从广播或者单播网络接收业务导航信息， 根据信号强度或者网络 指定的规则选择相应的服务网络， 并触发在几个不同的网络和应 用系统之间进行业务切换， 以便给用户提供一个近似无缝切换或 伪无缝切换的使用体验。
下面以图 3所示情形为例， 具体说明当移动终端 100在不同 的网络覆盖区域之间发生移动时， 本发明的切换方法及装置是如 何运作的。 图 3 中所示的椭圓区域 I表示专用广播网络 201 的覆 盖范围， 椭圓区域 II表示移动广播网络 202的覆盖范围， 而椭圓 区域 III表示移动互动网络 203的覆盖范围。
假设移动终端 100开始时处于专用广播网络 201 的覆盖范围 内， 并已经获得了业务导航信息。 相应的节目 内容由实时编码器 301输出后， 分别经过专用广播信道和移动广播信道进行发送。 专 用广播业务中心 210 中的接入控制单元 213向中央业务订购单元 303 核对用户的订购信息。 在得到中央业务订购单元 303 的确认 后， 接入控制单元 213 将生成相应的业务关键信息并通过广播信 道发送给目标用户 （即移动终端 100 )。 移动终端 100在专用广播 网络 201的覆盖范围内收到广播的节目和相应的业务关键信息后， 对节目进行解密和播放。
在接收和播放广播节目的过程中， 移动终端 100发生移动， 进入专用广播网络 201、 移动广播网络 202 和移动互动网络 203 覆盖重叠的区域， 即图 3 中椭圓区域 I、 椭圓区域 II和椭圓区域 III的重叠部分。 在此过程中， 移动终端 100会持续对信号强度进 行监测。
当移动终端 100逐渐靠近移动广播网络 202的基站时， 移动 广播网络 202 的信号强度会在一段时间内高于专用广播网络 201 的信号强度。 这时移动终端 100 将检查之前获得的业务导航信息 中是否包含移动广播网络 202 这种接入方式， 如果包含， 则移动 终端 100将通过互动信道向移动广播业务中心 220 中的接入控制 单元 223 请求相应的业务关键信息 （比如业务密钥信息） 。 而接 入控制单元 223在收到移动终端 100的请求后， 会向中央业务订 购单元 303核对该用户的订购信息。在得到中央业务订购单元 303 的确认后， 接入控制单元 223 将相应的业务关键信息通过互动信 道返回给移动终端 100。 随后， 移动终端 100根据业务导航信息， 切换到接收来自移动广播网络 202 的数据流， 并用相应的业务关 键信息对其进行解密和播放。 由于不同的广播网络上播放的数据 流内容是同步的， 因此对于用户来说不会丢失或中断正在收看的 节目， 在使用体验上可以达到类似无缝切换的效果。
参照图 3 中的箭头所示， 当移动终端 100继续进行移动并逐 渐离开移动广播网络 202的覆盖区域时， 移动终端 100监测到移 动广播网络 202 的信号强度变得越来越弱， 而且附近除了移动互 动网络 203外， 也无其他广播网络的信号。 这时移动终端 100将 根据业务导航信息通过互动信道向移动互动业务中心 230 中的接 入控制单元 233发送业务请求。 而接入控制单元 233在收到移动 终端 100的请求后， 会向中央业务订购单元 303核对该用户的订 购信息。 在得到中央业务订购单元 303 的确认后， 接入控制单元 233将返回业务响应并允许移动终端 100播放相应的数据流。移动 终端 100从而得以与移动互动业务中心 230建立连接， 并切换到 基于用户请求的视频业务， 即互动业务， 以继续节目的播放。
在图 3的实施例中， 移动终端 100是通过对网络信号强弱的 监测来触发网络切换的， 因此要具有监测多个网络信号的能力， 如可以通过系统或者用户预先设定的优先级来选择优先切换到哪 个网络。
另外， 移动终端 100的移动方式也不限于图 3 中所示情形， 比如当移动终端 100是从移动互动网络 203 向移动广播网络 202 或专用广播网络 201移动时， 移动广播网络 202或专用广播网络 201可能之前已经获知移动终端 100的订购情况，并在广播信道中 发送移动终端 100所适用的密钥信息。 因此当移动终端 100监测 到相应的广播网络信号达到一定强度时， 可以跟据预设的优先级 规则， 直接切换到相应的广播网络进行业务的接收， 不必再由移 动终端 100 向相应的广播网络发出切换请求。 其他具体的切换过 程和原理与图 3的实施例类似， 因此不再赘述。
从上述描述可以看出， 本发明移动电视网络间切换方法和装 置是通过在不同网络上同步播放相同内容的业务， 在移动终端接 收和播放该业务过程中， 若发生网络间的移动时， 无论是从广播 网络移动到单播网络还是从单播网络移动到广播网络， 都能够触 发其切换到当前网络继续接收和播放该业务， 使用户获得伪无缝 切换的体验， 从而提供了更加灵活的多网络兼容性， 扩大了移动 电视业务的应用范围。
应当注意的是， 上述实施例用于说明、 而非限制本发明， 并 且， 在不脱离所附权利要求的保护范围的前提下， 本领域技术人 员应当理解， 对上述本发明所公开的移动电视网络间无缝切换方 法及其装置， 还可以在不脱离本发明内容的基础上做出各种改进。 因此， 本发明的保护范围应当由所附的权利要求书的内容确定。 此外， 不应当将权利要求中的任何参考标记解释为限制权利要求 的保护范围。

Claims

权 利 要 求
1、 一种使移动电视终端在第一和第二传播网络间进行切换的 方法， 包括步骤：
a、 向所述第一和第二传播网络同步发送同一内容的业务， 使 其能够同步传播该业务；
b、 在收到所述移动电视终端的播放请求后， 允许所述第一传 播网络发送相应的业务关键信息给所述移动电视终端， 使其可通 过所述第一传播网络接收和播放该业务； 以及
c、 允许所述第二传播网络发送相应的业务关键信息给所述移 动电视终端， 使其可通过所述第二传播网络继续接收和播放该业 务。
2、如权利要求 1所述的方法，其中在步骤 b之前还包括步骤： 通过所述第一传播网络发送业务导航信息给所述移动电视终端， 该业务导航信息用于引导所述移动电视终端接入第一和第二传播 网络。
3、 如权利要求 1或 2所述的方法， 其中在步骤 b之前还包括 步骤： 集中保存用户的业务订购信息， 用于在步骤 b和 c中分别 针对所述移动电视终端的播放和切换请求进行集中鉴权和业务授 权。
4、 如权利要求 3所述的方法， 其中步骤 b和 c中所述移动电 视终端根据相应的业务关键信息对所接收到的业务进行解密和播 放。
5、 如权利要求 3所述的方法， 其中在步骤 c中还包括步骤： 通过第二传播网络接收来自所述移动电视终端的切换请求。
6、 一种用于移动电视终端在第一和第二传播网络间进行切换 的装置， 包括：
实时编码器， 用于向所述第一和第二传播网络同步发送同一 内容的业务， 使其能够同步传播该业务； 以及
中央业务订购单元， 用于在收到所述移动电视终端的播放请 求后， 允许所述第一传播网络发送相应的业务关键信息给所述移 动电视终端， 使其可通过所述第一传播网络接收和播放该业务， 以及允许所述第二传播网络发送相应的业务关键信息给所述移动 电视终端， 使其可通过所述笫二传播网络继续接收和播放该业务。
7、 如权利要求 6所述的装置， 还包括中央业务导航单元， 用 于生成业务导航信息， 并通过所述第一传播网络发送该业务导航 信息给所述移动电视终端， 该业务导航信息用于引导所述移动电 视终端接入第一和第二传播网络。
8、 如权利要求 6或 7所述的装置， 所述中央业务订购单元还 用于集中保存所述移动电视终端的用户的业务订购信息， 并根据 该业务订购信息中分别针对所述移动电视终端的播放和切换请求 进行集中鉴权和业务授权。
9、 如权利要求 6或 7所述的装置， 所述中央业务订购单元还 用于通过第二传播网络接收来自所述移动电视终端的切换请求。
10、 一种用于移动电视终端在第一和第二传播网络间进行切 换的方法， 包括步骤：
a、 通过所述第一传播网络发送一个业务播放请求， 并接收来 自该第一传播网络反馈的相应的业务关键信息；
b、 根据步驟 a中所述的业务关键信息， 接收和播放所述第一 传播网络所传播的相应业务；
c、 在该业务播放过程中， 监测第一和第二传播网络环境； d、 当第一和第二传播网络环境符合预定条件时， 接收来自该 第二传播网络反馈的相应的业务关键信息； 以及
e、 根据步驟 d中所述的业务关键信息， 接收和播放所述第二 传播网络所同步传播的同一业务。
11、 如权利要求 10所述的方法， 其中在步骤 a之前还包括步
11
更正页 (细则第 91条） 骤： 通过所述第一传播网络接收一个业务导航信息， 该业务导航 信息用于引导所述移动电视终端接入第一和笫二传播网络。
12、 如权利要求 10或 11所述的方法， 其中在步骤 c 中监测 第一和第二传播网络环境包括监测来自所述第二传播网絡的信号 强度。
13、如权利要求 12所述的方法，其中在步骤 d中还包括步驟： 通过所述第二传播网络发送一个切换请求。
14、 如权利要求 13所述的方法， 其中在步骤 d中所述预定条 件包括来自所述笫二传播网络的信号强度大于一个预定阈值。
15、 如权利要求 10或 11所述的方法， 其中在步骤 d中还包 括步骤： 当第一和第二传播网络环境符合预定条件时， 根据预定 优先级规则， 决定是否通过所述第二传播网络接收和播放所述业 务。
16、 如权利要求 15所述的方法， 其中所述预定条件是指同时 存在笫一和第二传播网絡信号。
17、 如权利要求 10或 11所述的方法， 其中步骤 b和 e 中是 根据相应的业务关键信息对所接收到的业务进行解密和播放。
12
更正页 (细则第 91 ' )
PCT/CN2008/073477 2008-12-12 2008-12-12 移动电视网络间切换方法及装置 Ceased WO2010066082A1 (zh)

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CN200880130194XA CN102084713A (zh) 2008-12-12 2008-12-12 移动电视网络间切换方法及装置
EP08878682A EP2378830A4 (en) 2008-12-12 2008-12-12 METHOD AND DEVICE FOR HANDLING BETWEEN MOBILE TV NETWORKS
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