EP2016792A1 - Procédé et système pour garantir la continuité de services dans un système de radiodiffusion numérique - Google Patents

Procédé et système pour garantir la continuité de services dans un système de radiodiffusion numérique

Info

Publication number
EP2016792A1
EP2016792A1 EP07746427A EP07746427A EP2016792A1 EP 2016792 A1 EP2016792 A1 EP 2016792A1 EP 07746427 A EP07746427 A EP 07746427A EP 07746427 A EP07746427 A EP 07746427A EP 2016792 A1 EP2016792 A1 EP 2016792A1
Authority
EP
European Patent Office
Prior art keywords
service
network
mapping information
information
terminal
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.)
Withdrawn
Application number
EP07746427A
Other languages
German (de)
English (en)
Other versions
EP2016792A4 (fr
Inventor
Yiling c/o Samsung Electronics Co. LTD XU
Jae-Yeon c/o Samsung Electronics Co. LTD SONG
Kook-Heui c/o Samsung Electronics Co. LTD LEE
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.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics 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 Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP2016792A1 publication Critical patent/EP2016792A1/fr
Publication of EP2016792A4 publication Critical patent/EP2016792A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0413—Frames or casing structures therefor
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0418—Constructional details
    • G09F13/0445—Frames
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/04—Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0418—Constructional details
    • G09F13/045—Signs, boards or panels specially adapted for doors
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
    • H04H20/22—Arrangements for broadcast of identical information via plural broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/20—Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • G09F2013/222—Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent with LEDs
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/57—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for mobile receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/30—Aspects of broadcast communication characterised by the use of a return channel, e.g. for collecting users' opinions, for returning broadcast space/time information or for requesting data
    • H04H2201/37—Aspects of broadcast communication characterised by the use of a return channel, e.g. for collecting users' opinions, for returning broadcast space/time information or for requesting data via a different channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/68—Systems specially adapted for using specific information, e.g. geographical or meteorological information
    • H04H60/72—Systems specially adapted for using specific information, e.g. geographical or meteorological information using electronic programme guides [EPG]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/76—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet
    • H04H60/81—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by the transmission system itself
    • H04H60/90—Wireless transmission systems
    • H04H60/91—Mobile communication networks

Definitions

  • the present invention relates generally to a digital broadcasting system, and in particular, to a method and system for guaranteeing service continuity of the ongoing service using an Electronic Service Guide (ESG) of Convergence of Broadcasting and Mobile Service (CBMS).
  • ESG Electronic Service Guide
  • CBMS Convergence of Broadcasting and Mobile Service
  • BCAST Mobile Broadcast
  • Mobile Broadcast can be achieved with a process of discovering a service by a mobile terminal such as mobile phone, notebook computer, Personal Digital Assistant (PDA), etc., capable of receiving Mobile Broadcast, a process of subscribing to the service by the mobile terminal, a process of provisioning a variety of information needed for receiving the service, and a process of transmitting and receiving the service by the mobile terminal.
  • a mobile terminal such as mobile phone, notebook computer, Personal Digital Assistant (PDA), etc.
  • PDA Personal Digital Assistant
  • OMA Open Mobile Alliance
  • a terminal for receiving broadcast services receives a Service Guide (SG) including description information for a service itself, charging information for the service, and information on a reception method of the service, and receives a desired service using the service guide.
  • SG Service Guide
  • a terminal moves to another network, i.e. visited network, of a foreign service provider, other than the current network, i.e. home network, of the home service provider to which its user has subscribed
  • the user may want to receive the broadcast service of the home network or a service of the foreign service provider having a roaming contract with the home network, using his/her terminal.
  • This procedure is called 'roaming'.
  • the terminal moves from the home network to the visited network in the course of receiving a broadcast service, the user may want to seamlessly receive the broadcast service using the terminal, and this procedure is called 'handover'.
  • the conventional CBMS system provides no specific procedure for the roaming and handover of the broadcast service.
  • Another aspect of the present invention is to provide a method and system for generating messages including service content type information and exchanging the messages between a home network and a neighboring network to guarantee service continuity in a digital broadcasting system.
  • Another aspect of the present invention is to provide a method and system for generating messages including time difference information of a service and exchanging the messages between a home network and a neighboring network to guarantee service continuity in a digital broadcasting system.
  • a method for providing service continuity in a home network of a digital broadcasting system includes acquiring, from a neighboring network, service information for broadcast services provided in the neighboring network; comparing the service information acquired from the neighboring network with currently provided service information, and generating service mapping information indicating at least one second broadcast service being similar or identical to a first broadcast service currently provided to a terminal, among broadcast services provided in the neighboring network; and transmitting the generated service mapping information to the terminal so that the terminal can continuously receive the broadcast service after roaming to the neighboring network.
  • a method for receiving service continuity from a neighboring network by a terminal in a digital broadcasting system includes determining whether there is a need for roaming; if it is determined that there is a need for roaming, issuing a request for service mapping information indicating at least one second broadcast service being identical or similar to a first broadcast service currently received from a home network, among broadcast services provided in at least one neighboring network; and upon receipt of a service mapping information response message with service mapping information from the home network, continuously receiving the second broadcast service in succession to the first broadcast service from a selected one of at least one neighboring network using the service mapping information.
  • a digital broadcasting system for providing service continuity to a terminal.
  • the digital broadcasting system includes a home network for acquiring, from a neighboring network, service information for broadcast services provided in the neighboring network, comparing the acquired service information with service information for broadcast services provided in the home network, generating service mapping information indicating at least one second broadcast service being similar or identical to a first broadcast service currently provided to the terminal, among broadcast services provided in the neighboring network, and transmitting the generated service mapping information to the terminal; and the terminal for receiving the service mapping information, and continuously receiving the second broadcast service in succession to the first broadcast service from a selected one of at least one neighboring network using the service mapping information.
  • FIG. 1 is a block diagram illustrating architecture of a CBMS system according to a preferred embodiment of the present invention
  • FIG. 2 is a diagram illustrating a data model of an ESG according to a preferred embodiment of the present invention
  • FIG. 3 is a diagram illustrating a roaming procedure without service continuity guaranteed according to the present invention.
  • FIG. 4 is a diagram illustrating a roaming procedure with service continuity guaranteed according to the present invention
  • FIGs. 5 to 7 are diagrams illustrating three types of a time difference
  • FIG. 8 is a diagram illustrating a signaling procedure of a terminal according to the present invention
  • FIG. 9 is a diagram illustrating a roaming procedure of a home network according to a first embodiment of the present invention
  • FIG. 10 is a diagram illustrating a roaming procedure of a home network according to a second embodiment of the present invention.
  • FIGs. HA and HB are diagrams illustrating signaling flows of roaming messages with service continuity guaranteed according to the first and second embodiments of the present invention
  • FIG. 12 is a diagram illustrating architecture of a home network according to the first and second embodiments of the present invention.
  • FIG. 13 is a diagram illustrating architecture of a terminal according to the first and second embodiments of the present invention.
  • the present invention provides a method and system for seamlessly receiving the current ongoing service when a subscriber of a home service provider, i.e. a receiver or terminal, moves from a service area of a home network of the home service provider to a service area of another network of a foreign service provider in a Convergence of Broadcasting and Mobile Service (CBMS) system.
  • a subscriber of a home service provider i.e. a receiver or terminal
  • CBMS Convergence of Broadcasting and Mobile Service
  • FIG. 1 illustrates architecture of a CBMS system according to a preferred embodiment of the present invention. Shown are logical entities for accomplishing the functions required for Digital Video Broadcasting - Handheld (DVB-H)-based Internet Protocol Data Cast (IPDC). The shown entities are divided according to difference of the major functions, and can be located in the physically divided servers or the same server.
  • DVD-H Digital Video Broadcasting - Handheld
  • IPDC Internet Protocol Data Cast
  • a Content Creation block (CC) 110 generates content sources of a broadcast service and sends the content sources to a Service Application block (SA) 120.
  • SA Service Application block
  • the Service Application block 120 generates service data for a particular service by aggregating the content sources provided from the Content Creation block 110 and the metadata additionally required for service configuration. To this end, the Service Application block 120 is made up of several sub-entities that manage different applications for their associated services.
  • a Service Management block (SM) 115 perform functions of service configuration, resource allocation, Electronic Service Guide (ESG) provisioning, security, etc. between the Service Application block 120 and a Terminal 160.
  • ESG Electronic Service Guide
  • a Broadcast Network 140 a network for transmitting broadcast service data, can be, for example, a DVB-H system.
  • An Interactive Network 150 generally means a cellular mobile communication network such as a 3 rd Generation Partnership Project (3GPP)- based Universal Mobile Telecommunications System (UMTS) network, a 3GPP2- based International Mobile Telecommunications (IMT)-2000 network, and a Wireless Broadband internet (WiBro) network.
  • 3GPP 3 rd Generation Partnership Project
  • UMTS Universal Mobile Telecommunications System
  • IMT International Mobile Telecommunications
  • WiBro Wireless Broadband internet
  • the Interactive Network 150 can be all kinds of mobile communication networks that provide a function capable of receiving information or request transmitted from the Terminal 160 and sending a response to the information or request.
  • the Broadcast Network 140 and the Interactive Network 150 act as transmission bearers in the CBMS system.
  • the Terminal 160 means a user terminal, and indicates a receiver capable of accessing the Interactive Network 150 and receiving a broadcast service from the Broadcast Network 140.
  • the Terminal 160 receives service data and signaling information from the Broadcast Network 140, and interactively exchanges the service data and the signaling information with the Interactive Network 150.
  • X-I, X-2 and X-3 interfaces mean reference points between the Broadcast Network 140 and other entities, and are generally not used in the DVB-H based interactive standard.
  • the X-I interface makes a connection between Content Creation block 110 and the Service Application block 120
  • the X-2 interface makes a connection between the Interactive Network 150 and the Terminal 160
  • the X-3 interface makes a connection between the Service Management block 115 and the Interactive Network 150.
  • a CBMS-I interface conveys broadcast-related signaling
  • a CBMS-2 interface conveys contents such as audio, video, file, and the like.
  • a CBMS-3 interface conveys an Electronic Service Guide (ESG)
  • a CBMS-4 interface conveys an ESG in a Point-to-Point (PtP) transmission manner
  • a CBMS-5 interface conveys Short Message Service (SMS), Multimedia Message Service (MMS), etc. in a PtP transmission manner.
  • a CBMS-6 interface conveys configuration parameters such as the number of services, allocated bandwidth, etc. for DVB-H transmission
  • a CBMS-7 interface conveys a declaration or metadata of a service application.
  • FIG. 2 illustrates a data model of an ESG according to a preferred embodiment of the present invention.
  • the ESG data model includes a Service fragment 202, a Schedule Event fragment 204, a Content fragment 206, an Acquisition fragment 208, a Service Bundle fragment 210, a Purchase fragment 212, and a Purchase Channel fragment 214.
  • the Service fragment 202 includes a full description of services, the
  • Schedule Event fragment 204 indicates time information of the services
  • the Acquisition fragment 208 includes service access information that the terminal needs to acquire to receive service data.
  • the Service Bundle fragment 210 includes information for the case where several services are packed up into one service bundle
  • the Purchase fragment 212 provides price information for purchase of the service bundle
  • the Purchase Channel fragment 214 provides information on the system needed to be used for acquiring a right for the purchase.
  • Each of the fragments of the data model can make reference to other fragments, and arrows between the fragments indicate the reference relationship.
  • the 'reference' as used herein refers to an operation in which the current fragment provides information related to its own fragment using information transmitted from another fragment. That is, when one service is composed of several contents, the Service fragment 202 merely includes a full description of a service, for example, name and language of the service, but does not include a description of the contents transmitted through the service. However, the Content fragment 206 of the corresponding contents makes reference to the Service fragment 202. In order to acquire a variety of information necessary for receiving the service, for example, session information used for a transmission protocol, the terminal should receive the Acquisition fragment 208 to which the Service fragment 202 makes reference, and demodulate the received Acquisition fragment
  • the ESG data is separately transmitted to the terminal at a different time from that of a data stream, using at least one IP stream. Therefore, with use of the
  • the service provider before transmission of the service, can provide the information that the user should acquire before receiving the service.
  • the terminal By receiving an ESG stream, the terminal acquires the information necessary for receiving the services provided by the service provider, and when the user selects a particular service, the terminal accesses the data stream over which the service is transmitted, using the acquired information, and then receives data.
  • the information that the terminal needs in accessing the service data stream is transmitted through the Acquisition fragment 208 as described above.
  • the ESG data models are contained in one container after they are bundled for each individual fragment, and each container is regarded as one object in a File Delivery over Unidirectional Transport protocol (FLUTE) session during its transmission.
  • FLUTE File Delivery over Unidirectional Transport protocol
  • one of passive handover and active handover can be used according to availability of an interactive channel.
  • one of signaling delivery over an interactive channel and service delivery over an interactive channel is used according to whether the data transmi ⁇ table over the interactive channel is signaling information or service data.
  • one of network-controlled handover and terminal-controlled handover can be used according to whether an entity for making handover decision is a network or a terminal.
  • a preferred embodiment of the present invention adds the handover information to an ESG related to the broadcast service.
  • the terminal before the handover actually occurs, acquires the handover information from the ESG and appropriately determines a needed handover time and a handover type based on other condition information acquired from the ESG.
  • the handover information is added as a new information element to at least one of the Service fragment 202, the Content fragment 206 and the Acquisition fragment 208 described in FIG. 2, or added in an ESG as a new fragment (for example, a handover fragment).
  • a new fragment for example, a handover fragment.
  • the present invention provides a scheme of performing handover and roaming on the assumption of a change in IP platform. Also, the present invention can be modified and applied according to other definitions such as a change in ESG provider and a change in network operator.
  • 'roaming' used in this specification is given as an example, and can be changed to handover or other terms according to the final definition.
  • 'roaming' and 'handover' refer to the same procedure, and although the term 'roaming' out of the two terms will be used in this specification, by way of example, it can be replaced with the term 'handover' and can also be replaced with other term according to the final definition.
  • the 'roaming' procedure according to a change in IP platform will be described herein, by way of example, a roaming procedure according to a change in ESG provider and/or a change in network operator is also possible.
  • 'another (or foreign) network' means all networks except for the home network
  • 'neighboring network' means networks neighboring the home network
  • 'candidate network' means a network providing the similar or same broadcast service as the broadcast service provided by the home network, among the neighboring networks, i.e. means one of the neighboring networks.
  • the candidate network is a target network to which the terminal will perform roaming.
  • FIG. 3 illustrates a roaming procedure without service continuity guaranteed according to the present invention.
  • a terminal receives a service from a home network (IP platform, ESG provider) in step 311, and views an ESG of a neighboring network in step 312. Thereafter, the terminal receives a service from another network (IP platform, ESG provider) in step 313.
  • IP platform ESG provider
  • the terminal can tune (turn) to another IP platform when a consuming service is not available in one IP platform (ESG provider, network provider, etc) and when the terminal still wants to consume the corresponding service. This procedure is called 'roaming'.
  • the terminal should interrupt the reception of the service provided from the current home network for a time tl ⁇ t2, in order to receive an ESG of neighboring network and determine presence/absence of a desired service. If the desired service exists in another network, the terminal can turn to another network to receive the corresponding desired service. However, because the service reception should restart after the current service first terminates, the roaming procedure of FIG. 3 cannot support service continuity of the terminal.
  • the terminal searches for (finds) candidates while continuously receiving the service from the current IP platform, and can receive the identical service from further another IP platform stated above. That is, the roaming with service continuity guaranteed can be supported.
  • a service identifier (Service ID, IP address) is allocated only within a specific scope (one ESG provider, IP platform, network, etc).
  • a method proposed in the present invention can be used.
  • the terminal intends to keep the service but to change the reception from another scope (for example, IP platform, provider, network, etc.), the terminal intends to apply the present invention.
  • service continuity based on the time difference can be classified into three types as shown in Table 2.
  • FIGs. 4 to 6 illustrate three types of the time difference.
  • the terminal after its roaming to another network, can seamlessly receive even in another network the service that it was receiving in the home network.
  • the terminal When the service of the neighboring network goes ahead of or goes behind the service of the home network, i.e. when their service times are different from each other, the terminal cannot continuously receive the service. In this case, before moving to neighboring networks, receiving ESGs therefrom and checking the contents of the received ESGs one by one, the terminal notifies the user that the service being identical or similar to the service previously received from the home network is received from the neighboring network, thereby allowing the user to recognize that he/she can receive from the neighboring network the service that he/she was previously receiving from the home network.
  • the home network provides the time information of Table 2 to the terminal, and the time information can be used for scheduling the services provided from the foreign (or external) network. Therefore, with use of the time information, the terminal can schedule service provision to the user. For example, when the service being identical or similar to the service provided in the home network is provided in the neighboring network four hours later, the terminal can instruct the user to access the neighboring network and receive the service four hours later.
  • the service mapping information that the home network has generated taking the foregoing factors into account can be summarized as shown in Table 3.
  • the terminal can receive the service after compensating for the time difference between the service provided in the home network and the service provided in the neighboring network using the time difference information between the home network and the neighboring network.
  • the service mapping information includes service identifier information such as service identifiers (Service IDs) of the services provided from the home network and the neighboring network, IP addresses of the home network and the neighboring network, ESG provider IDs of the home network and the neighboring network, and IP platform IDs of the home network and the neighboring network; content type information indicating identity between the broadcast services provided from the home network and the neighboring network; time difference information between the services provided from the home network and the neighboring network; and access information with which the terminal accesses the neighboring network.
  • Service IDs service identifiers
  • IP addresses of the home network and the neighboring network IP addresses of the home network and the neighboring network
  • ESG provider IDs of the home network and the neighboring network ESG provider IDs of the home network and the neighboring network
  • IP platform IDs of the home network and the neighboring network IP platform IDs of the home network and the neighboring network
  • content type information indicating identity between the broadcast services provided from the home network and the neighboring network
  • time difference information between the services provided
  • the service identifier information is information that should necessarily be included in the service mapping information, and the other information of 'content type', 'time difference and/or schedule' and 'access information' can be included on a scenario by scenario basis, or only a part of it can be included.
  • Service A indicates a service of the home network (IP platform, ESG provider), and Service A' indicates a mapping service of the foreign network (IP platform, ESG provider).
  • the 'mapping service' refers to a service provided from another network, IP platform or ESG provider, which is similar or identical to the service provided from the home network.
  • the service mapping information is information related to the service provided from another network, IP platform or ESG provider, which is similar or identical to the service provided from the current home network, and this is as shown Table 3.
  • Service A is one service provided from the current IP platform (ESG provider, network)
  • Service A' is a service provided from another IP platform (ESG provider, network), which is similar or identical to Service A provided from the current IP platform (ESG provider, network). Therefore, Service A' is a mapping service of Service A.
  • the service mapping information between Service A and Service A' is as shown in Table 3, in which service identifier information (Service ID, IP address, ESG provider ID, IP platform ID), content type, time difference and/or schedule information, and access information are included.
  • service identifier information Service ID, IP address, ESG provider ID, IP platform ID
  • content type content type
  • time difference and/or schedule information access information
  • the access information includes corresponding frequency, transmission stream, cell, network information, etc., and can help the terminal search for a desired service.
  • IP platform, ESG provider IP platform, ESG provider
  • the user should acquire the corresponding information by parsing the ESG of the network to which the terminal has moved.
  • the user has no need to wait until he/she arrives at the foreign network, and after receiving the foreign ESG, the user can previously acquire this information and make a plan according to the information. If the service mapping information is not provided from the home network, the user can acquire the service information only after accessing another network and parsing only the foreign ESG. Because mapping of the service information is already provided in the home network, the user can acquire the identical or similar service information without viewing the foreign ESG when there is a change in reception from the foreign network.
  • a procedure for parsing the foreign ESG can be stored.
  • the terminal can prepare an operation for receiving the services being identical or similar to the services provided in the home network. Otherwise, it is almost impossible for the terminal to recognize the identical service by simply viewing the ESG of another network, because even for the identical service, service ID and other service-related information are different for each ESG.
  • the terminal may have difficulty in finding the desired service.
  • the service information is herein the information necessary for generating the service mapping information.
  • a format of the service mapping information is variable.
  • Table 4 shows a type of a service mapping information format
  • Table 5 shows another type of the service mapping information format.
  • the service mapping information is provided on a service by service basis. For example, if there are two types of services, Table 4 first lists service mapping information for Service 1, and then lists all the service mapping information for Service 2.
  • the service mapping information is provided by content type. For example, first, the service mapping information for all identical services is listed. Second, the service mapping information for all variation services is listed. Finally, all related services are listed. If one terminal considers only the identical service in another IP platform, it can make the search only in the first section in Table 5.
  • the service mapping information of Table 4 and Table 5 With use of the service mapping information of Table 4 and Table 5, the user can fast and easily find its desired service. Therefore, this benefits the user in terms of service. Also, because service continuity is supported with such information, it will attract more users to consume the service, benefiting the service operators.
  • the service mapping information can be provided in various ways according to conditions.
  • Case 1 and Case 2 have been given above.
  • Case 1 when there is a change in broadcast service reception from another IP platform (ESG provider, network), all the service mapping information is provided to support service continuity.
  • Case 2 only service identifier and content type other than the service mapping information may be provided.
  • service identification information (Service ID, IP address, ESG provider ID, IP platform
  • the terminal has already found the candidate network and access information of the candidate network, and can transition to a reception state.
  • the service identifier mapping information and the content type are required to help the terminal determine whether the identical or similar service exists in another ESG provider and IP platform.
  • the terminal determines whether the similar or identical service path exits in another ESG provider and IP platform, depending on the service identifier mapping information and content type.
  • the terminal can change the new ESG reception without user browsing.
  • the user finds a new ESG, and finds a schedule related to the access information using its mapping identifier of the mapping information.
  • the present invention includes providing mapping information between services provided from different IP platforms (ESG providers or network operators), to the terminals.
  • the present invention provides a scheme in which the home network generates service mapping information using service information collected from other networks and provides the service mapping information via an interactive network.
  • FIG. 7 illustrates a roaming procedure with service continuity guaranteed according to the present invention.
  • a terminal detects a need for a roaming process at a time tl while continuously receiving a service from a home network (IP platform, ESG provider).
  • the terminal requests and collects mapping information of the service being received from the current home network over an interactive network.
  • the terminal searches for neighboring networks that provide the similar or identical service to the service provided from the home network, among the neighboring networks. The terminal selects the highest-signal strength neighboring network among the searched neighboring networks, as a candidate network.
  • the terminal turns its operation to receive the similar or identical broadcast service to the broadcast service received from the home network, from the candidate network selected in step 712, and receives the broadcast service from the candidate network (IP platform, ESG provider). Therefore, the terminal can support service continuity even though it performs roaming from the home network to the candidate network.
  • IP platform IP platform, ESG provider
  • the present invention proposes mapping information indicating the relationship and access parameter for the identical service provided from different IP platforms (or providers, networks).
  • the service mapping information can be added to a Program Specific Information/System Information (PSI/SI) or ESG. Also, the service mapping information can be transmitted over the interactive channel.
  • PSI/SI Program Specific Information/System Information
  • ESG ESG
  • FIG. 8 illustrates a signaling procedure of a terminal according to the present invention.
  • a terminal receives a service from a home network in step 800.
  • the terminal Upon detecting a need for roaming in step 805, the terminal sends a service mapping information request message to the home network in step 810.
  • the terminal receives a service mapping information response message from the home network in step 812.
  • the terminal parses the received service mapping information response message in step 814 to determine whether service mapping information included in the service mapping information response message is available.
  • Table 6 and Table 7 the major contents of the request and response messages are shown in Table 6 and Table 7. That is, the service mapping information will be transmitted in the formats shown in Table 6 and Table 7, when the terminal inquires whether there is service mapping information for the instant the terminal moves to a specific network for a specific network, and then sends a response to the inquiry.
  • step 814 If it is determined in step 814 that service mapping information is available, the terminal tests in step 816 its neighboring networks to select therefrom a candidate network that provides a similar or identical service to the service provided from the home network, and has the highest received signal strength. After selecting the candidate network for roaming in step 816, the terminal performs in step 818 roaming to the selected candidate network and receives the service therefrom.
  • step 820 the terminal proceeds to step 820 where it performs an operation corresponding to a predetermined procedure.
  • the operation performed in step 820 is variable, and can include, for example, an operation of terminating service consumption or turning to another service, and a detailed description thereof will be omitted herein, because it departs from the scope of the present invention.
  • the terminal sends a service mapping information request to the home network if there is a need for roaming.
  • the request by the terminal may include information indicating a type of the acceptable roaming service, information indicating whether the corresponding service is an 'identical', 'variation' or 'associated' service, information indicating requirement for the service difference, information indicating the schedule, and information indicating whether access information is needed.
  • the terminal After receiving a service mapping information response from the home network, the terminal determines whether the requested service mapping information is available, and continually receives the service according to the result.
  • FIGs. 9 and 10 illustrate a roaming procedure of a home network according to an embodiment of the present invention.
  • the roaming procedure can be divided herein into two different embodiments according to agreement between the home network and the foreign network.
  • FIG. 9 illustrates a roaming procedure of a home network according to a first embodiment of the present invention
  • FIG. 10 illustrates a roaming procedure of a home network according to a second embodiment of the present invention.
  • the two embodiments can be distinguished according to whether the home network will send a request for service information to neighboring networks before a roaming request of the terminal, or will send the request after the roaming request.
  • the home network previously acquires service information from neighboring networks, generates and stores service mapping information using the acquired service information, and sends a service mapping information response message with the generated service mapping information upon receipt of a service mapping information request message from the terminal.
  • the home network receives service information from a neighboring network and updates the service information in step 900.
  • the home network generates in step 902 service mapping information using the service information acquired in step 900 and updates the previously stored service mapping information with the generated service mapping information.
  • the home network sends a request for service information to the neighboring network and receives a response to the sendee information request from the neighboring network.
  • the home network receives a service mapping information request message from the terminal. After receiving the service mapping information request message from the terminal in step 904, the home network sends a service mapping information response message with the service mapping information generated in step 902 to the terminal in step 906.
  • the home network and the neighboring network update service mapping information by communicating service information.
  • the home network has already stored the service mapping information. Therefore, upon receiving the service mapping information request message from the terminal, the home network can immediately send a service mapping information response message to the terminal according to terminal requirement and service mapping information collected from neighboring networks .
  • FIG. 10 illustrates a roaming procedure of a home network according to the second embodiment of the present invention.
  • the home network receives a service mapping information request message from a terminal in step 1000.
  • the home network sends a request for service information to neighboring networks in step 1002.
  • the home network receives service information responses from the neighboring networks in step 1004.
  • the home network generates in step 1006 service mapping information using the service information received from the neighboring networks, and sends in step 1008 a service mapping information response message with the generated service mapping information to the terminal.
  • FIGs. HA and HB illustrate signaling flows of roaming messages with service continuity guaranteed according to the first and second embodiments of the present invention.
  • steps 1106 to 1122 show a signaling flow according to the first embodiment of the present invention
  • steps 1138 to 1156 show a signaling flow according to the second embodiment of the present invention.
  • reference numeral 1100 denotes a terminal
  • reference numeral 1102 denotes a home network
  • reference numeral 1104 denotes a neighboring network of the home network 1102. The entities in the home network 1102 will be described in detail with reference to FIG. 12.
  • the terminal 1100 is receiving a service from the home network 1102 in step 1106.
  • the neighboring network 1104 is providing the identical or similar service to the service that the terminal 1100 is currently receiving from the home network 1102, i.e. is a candidate network.
  • the terminal 1100 intends to perform roaming to the neighboring network 1104 so as to guarantee service continuity.
  • the home network 1102 acquires service information from the neighboring network 1104. That is, the service information can be communicated between the home network 1102 and the neighboring network 1104 to which the terminal 1100 will perform roaming.
  • the home network 1102 can periodically acquire service information from the neighboring network 1104, or can acquire the service information by sending a request for the service information to the neighboring network 1104.
  • the terminal 1100 determines in step 1107 that there is a need for roaming to a neighboring network, the terminal 1100 sends a service mapping information request message to the home network 1102 via an Interactive Network 1102c in step 1110.
  • the Interactive Network 1102c sends over an interactive channel the service mapping information request to a Mobility Management (MM) block in an SM block 1102b that manages mobility, handover and roaming of the terminal.
  • MM Mobility Management
  • the SM 1102b Upon receiving the service mapping information request message from the terminal 1100 in step 1112, the SM 1102b generates in step 1113 service mapping information using service information from the neighboring network 1104, acquired in step 1108.
  • the SM 1102b in the home network 1102 generates service mapping information, shown in Table 3, indicating at least one of the similar or identical services to the service that the terminal 1100 desires to receive, among the broadcast service currently provided from the home network 1102 to the terminal 1100 and the broadcast services provided from the neighboring network 1104.
  • the SM 1102b can generate the service mapping information immediately upon acquiring the service information from the neighboring network 1104 in step 1108, or can generate the service mapping information when the service mapping information request message is received from the terminal
  • the service mapping information generated in step 1108 immediately after receiving the service information from the neighboring network will be the mapping information for the services from all neighboring networks of the home network 1102, and if the service mapping information is service mapping information generated in step 1113 immediately after receiving the service mapping information request message from the terminal 1100, the service mapping information corresponding to the neighboring network to which the terminal 1100 will perform roaming will be included therein.
  • the service mapping information request is service mapping information for one service, and this is sent to the MM block in the home network 1102.
  • the service mapping information request message sent by the terminal is sent to the MM block in the home network.
  • AU MM blocks are identical in structure, but the MM blocks in the home network and the foreign network will be different in detailed information (i.e. information of the services provided from neighboring networks of the home network).
  • the MM block in the SM block 1102b sends a service mapping information response message for the terminal 1100 to the Interactive Network 1102c. Then, the service mapping information response message with service mapping information for one service will be sent to the terminal 1100 via the Interactive Network 1102c.
  • the Interactive Network 1102c sends the service mapping information response message to the terminal 1100 over the interactive channel.
  • the home network 1102 can transmit the service mapping information via the Interactive Network 1102c, or can transmit the service mapping information to the Broadcast Network 1102d after including it in an ESG or PSI/SI.
  • the terminal 1100 makes a test on neighboring networks, and selects one neighboring network providing the best service, among the tested neighboring networks.
  • the selected neighboring network is a candidate network to which the terminal 1100 will perform roaming.
  • the test made herein can be a process of searching for a neighboring network having the highest signal strength and selecting the highest-strength neighboring network.
  • the terminal 1100 performs in step 1120 roaming to the neighboring network selected in step 1118, and receives in step 1122 the broadcast service from the selected neighboring network.
  • the terminal 1100 should select in step 1118 not only the neighboring network to which it will perform roaming, but also the service that it will receive, for the following reason. That is, because the service mapping information from the terminal 1100 was generated without the information on the neighboring network to which the terminal 1100 desires to perform roaming, the home network 1102 has generated service mapping information for all neighboring networks and transmitted the generated service mapping information to the terminal 1100.
  • the operation in which the terminal 1100 seamlessly provides a service while performing roaming according to the first embodiment of the present invention has been described through steps 1106 to 1122.
  • the terminal 1100 is receiving a broadcast service from the home network 1102 in step 1138, and determines in step 1139 whether there is a need for roaming. If there is a need for roaming in step 1139, the terminal 1100 sends a service mapping information request message to the home network 1102 via the Interactive Network 1102c in step 1140.
  • the Interactive Network 1102c Upon receiving the service mapping information request message over an interactive channel, the Interactive Network 1102c sends in step 1142 the received service mapping information request message to the MM block in the home network 1102, which manages mobility, handover and roaming of the terminal 1100.
  • the MM block in the home network 1102 Upon receiving the service mapping information request message from the terminal 1100, the MM block in the home network 1102 sends in step 1144 a request for service information to the neighboring network 1104. In step 1146, the MM block in the home network 1102 receives from the neighboring network 1104 a service information response in response to the service information request sent in step 1144. In step 1147, the MM block in the SM 1102b generates service mapping information using the service information response received from the neighboring network 1104 and its own service information.
  • step 1148 the MM block in the home network 1102 sends a service mapping information response message with the service mapping information generated in step 1147 to the Interactive Network 1102c.
  • step 1150 the Interactive Network 1102c sends the received service mapping information response message to the terminal 1100 over an interactive channel.
  • step 1152 the terminal 1100 makes a test on neighboring networks, and selects one neighboring network (i.e. candidate network) providing the best service, among the tested neighboring networks.
  • the terminal 1100 performs in step 1154 roaming to the neighboring network selected in step 1152, and receives in step 1156 a service from the neighboring network to which it has performed roaming.
  • the service mapping information request message is a request message for more than one interested services of the terminal, and the terminal may have more than one interested services. In this case, the terminal may want to acquire the mapping information only for the requested services. The terminal does not care whether there is any other mapping service.
  • the home network can define the service mapping information request message by defining a format in which the home network filters the mapping information only for the services requested by the terminal and feeds back the mapping information.
  • Table 6 shows a format of the service mapping information request message.
  • the service mapping information request message is send from the terminal to the SM over the interactive network.
  • the networks search for all the requested service mapping information and feed back the results to the terminal.
  • service mapping information request message is represented as service mapping information request message type 2, and can be shown in Table 7.
  • the terminal can request service mapping information for Service 1. If the service mapping information for Service 1 is available, the home network will provide all service mapping information for Service 1 along with the service mapping information response message.
  • the terminal requests all service mapping information between different IP platforms, i.e. between IP platform 1 and IP platform 2, and if there is all service mapping information for two services provided from IP platform 1 and IP platform 2, the home network transmits the service mapping information for Service 1 and Service 2 along with the service mapping information response message.
  • Table 8 shows a service mapping information response message.
  • the content carried in service mappping information response message has been describe above.
  • the detailed service mapping information response message format could be has some options.
  • the service mapping information response message can be configured herein service by service, type by type, or scope by scope.
  • mapping information on a service-by-service basis.
  • mapping information can be configured as shown in Table 8.
  • a format of the service mapping information response message is shown in Table 9. Corresponding frequency, transmission stream, cell, and network information except for the mapping information are provided so that the terminal can find the desired service more easily.
  • mapping information on a type-by-type basis.
  • mapping services can be classified according to content type, and mapping information can be configured in the manner of Table 10.
  • Table 9 and Table 11 are different from each other only in inclusion/non- inclusion of Contentype.
  • Table 9 does not include Contentype, but Table 11 includes Contentype.
  • Table 9, Table 11 and Table 13 can be regarded as a single message format, and they are generated on a service by service basis (FIG. 8), on a type by type basis (FIG. 10), and on a scope by scope basis (FIG. 12), respectively.
  • mapping information on a scope-by-scope basis.
  • Scope-by- Scope Configuration Mapping services are classified according to different scopes, and the scopes can be based on different networks (IP platforms, ESG providers).
  • mapping information based on IP platform can be configured as shown in Table 12, and can also be configured based on ESG provider and network operator in the similar method.
  • a format of the IP platform-based service mapping information response message is shown in Table 13.
  • the service mapping information response message can also be configured based on network or ESG provider as shown in Table 13.
  • FIG. 12 illustrates architecture of a home network according to first and second embodiments of the present invention. Only the entities for performing the logical functions related to the preferred embodiment of the present invention in the SM blocks of the visited network and the home network are shown herein.
  • an SA 1102a generates service data by combining related metadata and broadcast contents from multiple sources to provide a particular service, encodes the service data in the format interpretable by the terminal 1100, provides the coded service data to the terminal 1100 through streaming or file carrousel delivery, and generates metadata including a service description to be used for an ESG.
  • An ESG entity 1202 in an SM 1102b generates an ESG using metadata provided from the SA 1102a, and delivers the ESG.
  • Resource Allocation entity 1204 in charge of service configuration and allocation of network resources, makes a contention over a bandwidth of a broadcast bearer through communication with the SA 1102a, allocates services in positions on a broadcast network topology, determines a service bandwidth, and schedules service time.
  • a Security/Service Protection provision entity 1206 takes charge of security/authentication, service protection and service provisioning.
  • the entities 1202 to 1206 are connected to an MM block 1200 and perform the functions necessary for handover.
  • the MM block 1200 performs operations related to mobility of the terminal 1100, especially to handover and roaming.
  • the MM block 1200 exchanges service mapping information request and response with the terminal 1100, and generates service mapping information using the service information acquired from neighboring networks.
  • the MM block 1200 performs communication with other entities and sub-entities to support the roaming procedure. For information exchange, the MM block 1200 performs communication with MM blocks in other networks.
  • FIG. 13 illustrates architecture of a terminal according to first and second embodiments of the present invention.
  • the terminal 1100 includes not only a broadcast receiver 1302 capable of receiving broadcast signals from a Broadcast Network 1102d, but also an interactive adaptor 1304 capable of accessing an Interactive Network 1102c.
  • the broadcast receiver 1302 receives service data or signaling information from the Broadcast Network 1102d, and the interactive adaptor 1304 exchanges service data or signaling information via the Interactive Network 1102c.
  • An MM block 1300 performs the handover-related operations described above.
  • At least one of the entities 1302 and 1304 receives an ESG, detects handover information therefrom, and then sends the roaming information to the MM block 1300, and the MM block 1300, to process the roaming-related operation, is connected to a Subscription Management block 1310 in charge of a management/acquisition procedure for terminal rights related to service subscription, and a decryption procedure for service contents, and a content consumption block 1312 for providing audio and video of a broadcast service to users.
  • the present invention enables exchange of service mapping information between the home network and its neighboring networks, thereby supporting service continuity of the terminal that is receiving a particular service.
  • the present invention supports service continuity taking characteristics of service contents into account, or notifies the terminal and its user that the identical service is provided even in the neighboring network, taking the time difference into account, thereby facilitating efficient scheduling during service reception of the terminal.
  • the present invention can fast support the service requested by the terminal using the service mapping information exchanged between the home network and its neighboring network, without the need that the user moves to the neighboring network and receives a new ESG therefrom.
  • the present invention supports broadcast with service continuity using the service mapping information, thereby attracting more users to consume the services and thus motivating the service operators.

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Abstract

L'invention concerne un procédé servant à fournir une continuité de services dans un réseau de rattachement d'un système de radiodiffusion numérique. Ledit réseau de rattachement acquiert, d'un réseau voisin, des informations de services destinées aux services de radiodiffusion fournis dans le réseau voisin. Le réseau de rattachement compare les informations de services acquises du réseau voisin aux informations de services fournies actuellement et génère des informations de mappage de services indiquant au moins un second service de radiodiffusion similaire ou identique à un premier service de radiodiffusion actuellement fourni à un terminal parmi des services de radiodiffusion fournis dans le réseau voisin. Le réseau de rattachement transmet les informations de mappage de services générées au terminal pour que celui-ci puisse recevoir continuellement le service de radiodiffusion, après itinérance vers le réseau voisin.
EP07746427.9A 2006-05-09 2007-05-09 Procédé et système pour garantir la continuité de services dans un système de radiodiffusion numérique Withdrawn EP2016792A4 (fr)

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KR1020070014022A KR20070109800A (ko) 2006-05-09 2007-02-09 디지털 방송 시스템에서 서비스 연속성을 보장하는 로밍방법 및 장치
PCT/KR2007/002274 WO2007129863A1 (fr) 2006-05-09 2007-05-09 Procédé et système pour garantir la continuité de services dans un système de radiodiffusion numérique

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