WO2018043111A1 - 情報処理装置、情報処理方法、及び、情報処理システム - Google Patents
情報処理装置、情報処理方法、及び、情報処理システム Download PDFInfo
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- WO2018043111A1 WO2018043111A1 PCT/JP2017/029340 JP2017029340W WO2018043111A1 WO 2018043111 A1 WO2018043111 A1 WO 2018043111A1 JP 2017029340 W JP2017029340 W JP 2017029340W WO 2018043111 A1 WO2018043111 A1 WO 2018043111A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/12—Avoiding congestion; Recovering from congestion
- H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1031—Controlling of the operation of servers by a load balancer, e.g. adding or removing servers that serve requests
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/565—Conversion or adaptation of application format or content
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- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/21—Design, administration or maintenance of databases
- G06F16/211—Schema design and management
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
- H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/1014—Server selection for load balancing based on the content of a request
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1001—Protocols in which an application is distributed across nodes in the network for accessing one among a plurality of replicated servers
- H04L67/1004—Server selection for load balancing
- H04L67/1023—Server selection for load balancing based on a hash applied to IP addresses or costs
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- H—ELECTRICITY
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
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- H04L67/563—Data redirection of data network streams
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- H04L67/566—Grouping or aggregating service requests, e.g. for unified processing
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- G06F13/14—Handling requests for interconnection or transfer
- G06F13/20—Handling requests for interconnection or transfer for access to input/output bus
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/24—Traffic characterised by specific attributes, e.g. priority or QoS
- H04L47/2408—Traffic characterised by specific attributes, e.g. priority or QoS for supporting different services, e.g. a differentiated services [DiffServ] type of service
Definitions
- the present technology relates to an information processing apparatus, an information processing method, and an information processing system, and in particular, an information processing apparatus, an information processing method, and an information processing apparatus that can perform appropriate load distribution when a plurality of proxies are installed.
- the present invention relates to an information processing system.
- proxy server proxy
- a proxy server is installed between a server that distributes content via the Internet and a client device that reproduces the content, thereby improving response performance to requests from the client device.
- This technology has been made in view of such a situation, and is to enable appropriate load balancing when a plurality of proxies are installed.
- the information processing device is a proxy that receives a stream of content distributed for each of a plurality of services and transmits the content stream to a client device connected to a network, and serves as a master proxy for a slave proxy
- the information processing apparatus includes a processing unit that functions and determines a service charge range corresponding to a predetermined policy for each proxy.
- the information processing apparatus may be an independent apparatus or may be an internal block constituting one apparatus.
- the information processing method according to the first aspect of the present technology is an information processing method corresponding to the information processing apparatus according to the first aspect of the present technology described above.
- the proxy receives a stream of content distributed for each of a plurality of services, and transmits the stream to a client apparatus connected to a network. It functions as a master proxy for slave proxies, and for each proxy, a service responsibility range corresponding to a predetermined policy is determined.
- An information processing system includes a first information processing device in which a master proxy operates, one or more second information processing devices in which a slave proxy operates, and one or more client devices.
- the first information processing apparatus receives a stream of content distributed for each of a plurality of services and transmits it to the client apparatus connected to the network
- a proxy that functions as the master proxy for the slave proxy, and that includes a processing unit that determines a service responsibility range in accordance with a predetermined policy for each proxy
- the second information processing apparatus Receives a stream of content distributed for each of a plurality of services, A proxy that transmits to the connected client device, functions as the slave proxy for the master proxy, and processes a stream of content distributed by a service according to a range of responsibility determined by the master proxy Is an information processing system.
- the first information processing apparatus in which the master proxy operates receives a stream of content distributed for each of a plurality of services
- the client apparatus connected to the network receives A proxy that transmits, functions as the master proxy for the slave proxy, and for each proxy, a range of service according to a predetermined policy is determined, and content distributed for each of a plurality of services is determined.
- Receiving the stream, the client connected to the network A proxy that sent the winding device, wherein the function as a slave proxy for the master proxy streams of contents distributed by the service in accordance with the assigned range determined by the master proxy is processed.
- appropriate load distribution can be performed when a plurality of proxies are installed.
- FIG. It is a figure which shows the example of topology in case a network is home LAN etc.
- FIG. It is a figure which shows the example of the topology in case the network is the radio
- FIG. 1 is a diagram illustrating a configuration of an embodiment of a transmission system to which the present technology is applied.
- the system refers to a logical collection of a plurality of devices.
- the transmission system 1 includes a FW proxy device 10-1 to 10-N (N: an integer of 1 or more), a client device 20-1 to 20-M (M: an integer of 1 or more), and a broadcast server 40. It is comprised including.
- the FW proxy devices 10-1 to 10-N and the client devices 20-1 to 20-M are connected to a network 30 such as a home LAN (Local Area Network) built in the end user home 2. And can communicate with each other.
- a network 30 such as a home LAN (Local Area Network) built in the end user home 2. And can communicate with each other.
- the FW proxy device 10-1 is installed between a device connected to the network 30 and a broadcast transmission path 60 including the broadcast server 40, the transmitting station 50, and the like, and functions as a forward proxy (forward gateway proxy) (gateway function). )have.
- the FW proxy device 10-1 includes a dedicated server for providing a forward proxy function, a television receiver, a set top box (STB), a network storage, and the like.
- the FW proxy device 10-1 receives the broadcast wave transmitted from the broadcast server 40 via the transmitting station 50, and transmits the content stream obtained from the broadcast wave to the client device 20-1 connected to the network 30. Through 20-M.
- the FW proxy devices 10-2 to 10-N like the FW proxy device 10-1, are configured by a dedicated server, a television receiver, and the like, and have a function as a forward proxy.
- the FW proxy devices 10-2 to 10-N transmit (transfer) the content stream obtained from the broadcast wave from the broadcast server 40 to any of the client devices 20-1 to 20-M connected to the network 30. To do.
- FW proxy devices 10-1 to 10-N connected to the network 30, one of the FW proxy devices 10 functions as a master proxy, and the other FW proxy devices 10 Has a master-slave relationship that functions as a slave proxy. Since the FW proxy devices 10-1 to 10-N have a master-slave relationship, a service responsibility range is assigned to each FW proxy device 10 by the FW proxy device 10 in which the master proxy operates.
- FW proxy devices 10-1 to 10-N are simply referred to as the FW proxy device 10 when it is not necessary to distinguish between them.
- the FW proxy device 10 having a function as a master proxy is referred to as a master proxy device 10M, while the FW proxy device 10 having a function as a slave proxy is referred to as a slave proxy device 10S. To distinguish.
- the master proxy device 10M and the slave proxy device 10S will be referred to as FW proxy devices 10 when it is not necessary to distinguish them. That is, the FW proxy device 10 is either the master proxy device 10M or the slave proxy device 10S.
- the client device 20-1 is a receiver that receives and plays back a content stream transmitted (transferred) from any of the FW proxy devices 10-1 to 10-N via the network 30. That is, the client device 20-1 can reproduce the content distributed via the broadcast via any one of the FW proxy devices 10-1 to 10-N according to the operation of the end user.
- the client device 20-1 is configured as a fixed receiver such as a television receiver, a set top box, or a personal computer, or a mobile receiver such as a smartphone, a mobile phone, or a tablet computer. Further, the client device 20-1 may be a wearable computer such as a head mounted display (HMD).
- HMD head mounted display
- the client devices 20-2 to 20-M are composed of fixed receivers or mobile receivers used in the home, and any of the FW proxy devices 10-1 to 10-N.
- the content stream distributed via the broadcast is received and reproduced.
- the client devices 20-1 to 20-M are simply referred to as the client device 20 when it is not necessary to distinguish them.
- the detailed configuration of the client device 20 will be described later with reference to FIG.
- the broadcast server 40 is a server provided by a broadcaster such as a broadcast station, for example, and is connected to a transmission facility installed at the transmitting station 50 via a predetermined line such as a dedicated line.
- the broadcast server 40 processes content files (data) such as programs and CMs and control information (signaling), and transmits the data obtained as a result to a transmission facility in the transmitting station 50 via a dedicated line. Then, the transmission facility in the transmission station 50 performs necessary processing (modulation processing, etc.) on the data from the broadcast server 40, so that the broadcast wave obtained as a result is transmitted via the broadcast transmission path 60 to the end. Received by the FW proxy device 10 in the user home 2.
- the FW proxy device 10 is not limited to the end user home 2, but for example, It may be installed in a cable operator's head end, a mobile network base station, or the like so as to cover a wider area.
- the client device 20 is installed not at the same end user's home but at each end user's home that subscribes to cable television services. Will be.
- the client device 20 is a device that is owned indoors or outdoors by an end user with a mobile service contract.
- the FW proxy device 10 and the client device 20 may be in-vehicle devices mounted on a vehicle such as an automobile. Further, in the transmission system 1 of FIG. 1, communication performed between devices and servers connected to the network 30 is communication in which wireless communication and wired communication are mixed as well as wireless communication and wired communication, that is, a certain section. Then, wireless communication may be performed, and wired communication may be performed in other sections.
- FIG. 2 is a diagram illustrating a configuration example of the master proxy device 10M in the FW proxy device 10 of FIG.
- the master proxy device 10M includes a processing unit 100, a tuner 101, a communication I / F 102, and a storage unit 103.
- the processing unit 100 includes, for example, a CPU (Central Processing Unit) and a microprocessor.
- the processing unit 100 performs various kinds of arithmetic processing and processing such as operation control of each unit.
- the tuner 101 performs necessary processing (demodulation processing or the like) on the broadcast wave received via the antenna, and supplies the resulting multiplexed stream to the processing unit 100.
- the processing unit 100 processes the multiplexed stream supplied from the tuner 101 and supplies the resulting content stream to the communication I / F 102.
- the communication I / F 102 includes, for example, a communication interface circuit.
- the communication I / F 102 receives data transmitted from the client device 20 connected to the network 30 and supplies the data to the processing unit 100. Further, the communication I / F 102 transmits the content stream supplied from the processing unit 100 to the client device 20 via the network 30.
- the storage unit 103 includes, for example, a semiconductor memory, a hard disk drive (HDD: Hard Disk Drive), or the like.
- the storage unit 103 stores various data according to control from the processing unit 100.
- the processing unit 100 includes a master proxy 111, a UPnP / SSDP server 112, a proxy application manager 113, a local web server 114, and an SLS processing system 115.
- the master proxy 111 is a service that operates on the master proxy device 10M, and functions as a master proxy for the slave proxy that operates on the slave proxy device 10S.
- the master proxy 111 performs a process of assigning a service responsibility range to itself (master proxy) or slave proxy.
- the master proxy 111 performs processing related to the service within the assigned range in accordance with the assigned range of the service assigned by itself.
- the master proxy 111 notifies the request from the client device 20 to the slave proxy in charge of the target service. Details of processing performed by the master proxy 111 will be described later with reference to FIGS.
- the UPnP / SSDP server 112, the proxy application manager 113, and the local web server 114 are services that operate on the master proxy device 10M.
- the UPnP / SSDP server 112, the proxy application manager 113, and the local web server 114 establish a master / slave relationship between the master proxy 111 and a slave proxy operating in the slave proxy device 10S connected to the network 30. Process. Details of this processing will be described later with reference to FIGS.
- the UPnP / SSDP server 112 performs processing for establishing a connection between the master proxy 111 and the client device 20 connected to the network 30. Details of this processing will be described later with reference to FIG.
- the SLS processing system 115 performs processing related to SLS (Service Layer Signaling) which is control information acquired via broadcasting.
- SLS Service Layer Signaling
- a desired content stream (a content stream distributed by the service in charge) is obtained from the multiplexed stream. Details of the SLS will be described later with reference to FIG.
- the master proxy device 10M is configured as described above.
- FIG. 3 is a diagram illustrating a configuration example of the slave proxy device 10S in the FW proxy device 10 of FIG.
- the slave proxy device 10S includes a processing unit 150, a tuner 151, a communication I / F 152, and a storage unit 153. Note that the tuners 151 to 153 are configured in the same manner as the tuners 101 to 103 in FIG.
- the processing unit 150 includes, for example, a CPU, a microprocessor, and the like.
- the processing unit 150 performs various types of arithmetic processing and processing such as operation control of each unit.
- the processing unit 150 includes a slave proxy 161 and an SLS processing system 162.
- the slave proxy 161 is a service that operates on the slave proxy device 10S, and functions as a slave proxy for the master proxy 111 that operates on the master proxy device 10M.
- the slave proxy 161 performs processing related to the service in the service area in accordance with the service service area assigned by the master proxy 111. Details of processing performed by the slave proxy 161 will be described later with reference to FIGS.
- the SLS processing system 162 performs processing related to SLS, which is control information acquired via broadcasting. By processing the SLS by the SLS processing system 162, a desired content stream (content stream distributed by the service in charge) is obtained from the multiplexed stream. Details of the SLS will be described later with reference to FIG.
- the slave proxy device 10S is configured as described above.
- FIG. 4 is a diagram illustrating a configuration example of the client device 20 of FIG.
- the client device 20 includes a processing unit 200, a communication I / F 201, a display unit 202, and a speaker 203.
- the processing unit 200 includes, for example, a CPU, a microprocessor, and the like.
- the processing unit 200 performs various types of arithmetic processing and processing such as operation control of each unit.
- the communication I / F 201 includes, for example, a communication interface circuit.
- the communication I / F 201 requests content distributed by a desired service to the master proxy apparatus 10M connected to the network 30 according to control from the processing unit 200.
- the communication I / F 201 receives a stream of content transmitted (transferred) from the master proxy device 10M or the slave proxy device 10S via the network 30 and supplies the content stream to the processing unit 200.
- the processing unit 200 processes a stream of content supplied from the communication I / F 201, supplies video data to the display unit 202, and supplies audio data to the speaker 203 among the data obtained as a result.
- the display unit 202 includes a display such as an LCD (Liquid Crystal Display) or an OELD (Organic Electroluminescence Display).
- the display unit 202 displays a video corresponding to the video data supplied from the processing unit 200.
- the speaker 203 outputs sound corresponding to the audio data supplied from the processing unit 200.
- an operation signal according to an end user operation on the touch panel is supplied to the processing unit 200, and the processing unit 200 responds to the operation signal.
- an input unit such as a physical button is provided so that an operation signal corresponding to an end user operation on the input unit is supplied to the processing unit 200. Good.
- the processing unit 200 includes an application 211 and a browser 212.
- a renderer function is provided by the application 211 and the browser 212.
- the application 211 performs processing for the client device 20 connected to the network 30 to establish a connection with the master proxy 111 operating in the master proxy device 10M. Details of processing performed by the application 211 will be described later with reference to FIG.
- the browser 212 is a content stream supplied from the communication I / F 201, processes data received via broadcasting by the master proxy device 10M or the slave proxy device 10S, and reproduces the content.
- the browser 212 has a function as a DASH player, and details thereof will be described later with reference to FIG. Details of processing performed by the browser 212 will be described later with reference to FIGS.
- the client device 20 is configured as described above.
- FIG. 5 is a diagram illustrating an example of a protocol stack of the IP transmission scheme of the present technology.
- ATSC Advanced Television Systems Committee
- IP transmission method can be adopted as in ATSC 3.0 and the like.
- the lowest hierarchy is a physical layer.
- the physical layer corresponds to the frequency band of the broadcast wave allocated for the service (channel).
- the upper layer of the physical layer is the data link layer.
- the upper layers of the data link layer are an IP (Internet Protocol) layer and a UDP (User Datagram Protocol) layer.
- IP Internet Protocol
- UDP User Datagram Protocol
- the IP layer and the UDP layer are layers corresponding to the network layer and the transport layer in the communication hierarchical model, and the IP packet and the UDP packet are specified by the IP address and the port number.
- LLS Low Level Signaling
- SLS Service Layer Signaling
- the LLS includes metadata such as SLT (Service List).
- the SLT metadata includes basic information indicating the configuration of a stream or service in a broadcast network, such as information necessary for service (channel) channel selection.
- the SLT metadata is transmitted by being included in a UDP / IP packet that is an IP packet including a UDP packet. However, a UDP / IP packet storing SLT metadata is transmitted with a special IP address and port number.
- ROUTE Real-time Object Delivery Service Unidirectional Transport
- FLUTE FLUTE
- SLS is service level control information and provides information and attributes necessary for searching and selecting components belonging to the target service.
- SLS includes metadata such as USBD (User Service Bundle Description), S-TSID (Service-based Transport Session Instance Description), and MPD (Media Presentation Description).
- USBD User Service Bundle Description
- S-TSID Service-based Transport Session Instance Description
- MPD Media Presentation Description
- USBD metadata includes information such as where to obtain other metadata.
- the S-TSID metadata is an extension of LSID (LCT Session Instance Description) for ATSC 3.0, and is ROUTE protocol control information. Further, the S-TSID metadata can specify EFDT (Extended FDT) transmitted in the ROUTE session. EFDT is an extension of FDT (File Delivery Table) introduced in FLUTE, and is control information for transfer.
- MPD metadata is video and audio file control information used for streaming delivery in conformity with MPEG-DASH.
- MPEG-DASH is a streaming distribution standard according to OTT-V (Over The Top Video), and is a standard related to adaptive streaming distribution using a streaming protocol based on HTTP (Hypertext Transfer Protocol).
- the MPEG-DASH standard defines a manifest file for describing metadata, which is control information for video and audio files, and a file format for transmitting moving image content.
- the former manifest file is called MPD (Media Presentation Description), and the latter file format is also called a segment format.
- the MP4 file format can be used as the streaming file format.
- the MP4 file format is a derived format of ISO BMFF (ISO Base Media File Format) defined in ISO / IEC 14496-12.
- the segment transmitted in the ROUTE session is composed of an initialization segment (IS: Initialization Segment) and a media segment (MS: Media Segment).
- the initialization segment includes initialization information such as a data compression method.
- the media segment stores video, audio, and subtitle stream data. That is, this media segment corresponds to a DASH segment (DASH segment file).
- stream data of service components (video, audio, subtitles, etc.) constituting content such as a program is transmitted by a ROUTE session in units of DASH segments conforming to the ISO BMFF standard.
- NRT content is content that is once stored in the receiver storage and then played.
- files other than NRT content for example, files of applications and electronic service guides (ESG: Electronic Service Guide)
- ESG Electronic Service Guide
- SLT metadata as LLS and metadata such as USBD, S-TSID, and MPD as SLS should be text data described in a markup language such as XML (Extensible Markup Language). Can do.
- the upper layer of the physical layer is a data link layer (Data Link Layer).
- the upper layer of the data link layer is an IP layer corresponding to the network layer.
- An upper layer adjacent to the IP layer is a TCP (Transmission Control Protocol) layer corresponding to the transport layer, and an upper layer adjacent to the TCP layer is an HTTP layer corresponding to the application layer.
- TCP Transmission Control Protocol
- protocols such as TCP / IP that operate on communication lines such as the Internet are implemented by these layers.
- control information includes all control information such as control information transmitted in the above-described ROUTE session.
- NRT content is content acquired through communication, and includes, for example, an application.
- DASH DASH segments
- VOD Video On Demand
- a one-way broadcasting layer and a part of a two-way communication layer become a common protocol, so Can transmit the stream data of the service components that make up the content in units of DASH segments according to the ISO BMFF standard.
- a broadcast-type broadcast server 40 is provided on the transmission side, and the configuration corresponding to only one-way broadcast-type streaming distribution is shown.
- the present technology can also support streaming distribution in a bidirectional communication system. A configuration corresponding to streaming distribution in such a bidirectional communication system will be described later with reference to FIG.
- FW proxy devices 10-1 to 10-N are installed in the network 30 as in the transmission system 1 shown in FIG. 1, the destination of the DASH segment request from the client device 20 is sent. However, if it is fixed to a specific FW proxy device 10, other FW proxy devices 10 (for example, FW proxy devices 10 additionally installed later) will not function.
- the master proxy device 10M when a plurality of FW proxy devices 10-1 to 10-N are installed, the master proxy device 10M establishes a relationship between the master and the slave between the FW proxy devices 10.
- the DASH segment request from the client device 20 is appropriately redirected.
- the load for each FW proxy device 10 that is either the master proxy device 10M or the slave proxy device 10S is appropriately distributed.
- the relationship between the master and the slave between the FW proxy devices 10 may be set manually each time the FW proxy device 10 is added to the network 30, or the FW proxy devices 10 may be connected to each other, for example, You may determine by performing negotiation according to capability attributes (processing capability, storage capability, etc.).
- the master proxy device 10 when the FW proxy device 10 that is first connected to the network 30 is set as the master proxy device 10M, and then the FW proxy device 10 is added, the master FW proxy device 10 is added according to the capability attribute of the FW proxy device 10.
- the proxy device 10M may be determined.
- the master proxy device 10M may be fixed, and the same FW proxy device 10 may always play the role.
- the number of master proxy devices 10M is not limited to one, and a plurality of master proxy devices 10M may be installed. By providing a plurality of master proxy devices 10M, the processing load of each master proxy 111 can be distributed.
- the master FW proxy device 10 uses, for example, SSDP (Simple Service Discovery Protocol) of Universal Plug and Play (UPnP: Universal Plug and Play), etc.
- SSDP Simple Service Discovery Protocol
- UFP Universal Plug and Play
- An API Application Programming Interface
- the assigned service assigned range is assigned to each FW proxy device 10 (slave proxy device 10S) as a slave through the API.
- the master proxy device 10M generates a database for allocating the service charge range (hereinafter referred to as proxy-service charge range database), so that each FW proxy device 10 (the master proxy 111 operating on the FW proxy device 10 and the slave) A service charge range is assigned to the proxy 161).
- proxy-service charge range database a database for allocating the service charge range
- UPnP is a protocol that enables participation in the target network simply by connecting a device.
- SSDP is one of the protocols used in UPnP, and is used to search for and respond to devices on the network.
- the master proxy device 10M When the master proxy device 10M receives a DASH segment request from the client device 20, the master proxy device 10M refers to the proxy-service charge range database, identifies the responsible FW proxy device 10, and performs redirection to the FW proxy device 10. Do.
- the FW proxy device 10 that has received the redirection receives a stream of content distributed via broadcast within the range of the assigned service, and transmits the content stream to the client device 20 via the network 30.
- the master proxy device 10M assigns a service charge range to the FW proxy device 10 according to various policies (rules) when generating the proxy-service charge range database.
- a policy for example, all the services that can be received in the target area are mechanically assigned to the plurality of FW proxy devices 10, or the access frequency is taken into consideration of the end user viewing history.
- High service groups can be allocated so that the load is preferentially distributed.
- various rules can be selected, such as grouping services that can be received simultaneously.
- the unit for grouping services can be, for example, a broadcast stream ID (BSID: “Broadcast” Stream ”ID) unit.
- BSID Broadcast
- Stream ID data transmitted in a frequency band (for example, 6 MHz) specified by the broadcast stream ID can be acquired at a time. Details of the broadcast stream ID are described in, for example, “Table 6.2 6.2 SLT XML Format” of Non-Patent Document 1 below.
- Non-patent document 1 ATSC Candidate Standard: Signaling, Delivery, Synchronization, and Error Protection (A / 331) Doc. S33-174r15 January 2016
- the same master proxy device 10M (the master proxy 111 operating in the same) among the FW proxy devices 10 connected to the network 30 is shared.
- the service charge ranges of each of the one or more slave proxy devices 10S (the slave proxy 161 operating in) are reset.
- FIG. 6 shows an overview of the flow of proxy service area allocation and segment request redirection processing performed when the present technology is applied.
- the master proxy device 10M (the master proxy 111 operating in the network proxy) is connected to the network 30.
- the service responsibility range of the master proxy 111 and the slave proxy 161 operating in the FW proxy device 10 is determined (S2).
- a proxy-service charge range database storing data related to the service range handled by each FW proxy device 10 is generated, and the service charge range is notified to each FW proxy device 10. .
- each FW proxy device 10 prepares for service tuning in accordance with the service charge range from the master proxy device 10M.
- the master proxy device 10M (the master proxy 111 operating on the client device 20) receives the DASH segment from the client device 20.
- the request is redirected (S3).
- the master proxy device 10M refers to the proxy-service charge range database to determine the FW proxy device 10 that should be in charge of processing the DASH segment request from the client device 20, and sends it to the FW proxy device 10 On the other hand, a DASH segment request from the client device 20 is transmitted (redirection).
- the new slave proxy device 10S and the client device 20 are connected in that order to the network 30 in which the master proxy device 10M is present, and distributed by the client device 20 via broadcast. A case where the reproduction of the content to be instructed is described.
- steps S111 to S117 is executed by the master proxy device 10M, and the processing of steps S121 to S130 is executed by the newly added slave proxy device 10S.
- steps S101 to S105 is executed by the client device 20.
- step S122 the slave proxy 161 confirms the presence of the master proxy 111 operating in the master proxy device 10M.
- a presence confirmation message is transmitted by multicast to a device connected to the network 30 via / F152.
- step S122 the message transmitted by the slave proxy device 10S is received by the master proxy device 10M via the network 30.
- step S111 the master proxy 111 generates a setting management API according to the message received from the slave proxy device 10S, and notifies the slave proxy device 10S via the network 30 as a response.
- step S111 the setting management API transmitted by the master proxy apparatus 10M is received by the slave proxy apparatus 10S via the network 30.
- step S123 the slave proxy 161 controls the tuner 151 to scan the service.
- a service scan result indicating a service receivable by the slave proxy apparatus 10S is obtained from SLT metadata transmitted as LLS.
- the rescan process is performed by the tuner 101 (S112).
- a service scan result indicating a service receivable by the master proxy apparatus 10M is obtained from SLT metadata transmitted as LLS.
- the service that can be received by the master proxy apparatus 10M does not change frequently, once the service scan is performed, the service scan result can be continuously used.
- the master proxy device 10M is a movable device such as a mobile receiver or an in-vehicle device, the service that can be received is likely to change depending on the current area, so the service scan is performed again. There is a need.
- step S124 the slave proxy 161 notifies the master proxy 111 operating in the master proxy apparatus 10M of the service scan result obtained in the process of step S123. Further, the slave proxy 161 requests a service charge range from the master proxy 111 (S125).
- slave proxy 161 may include the service scan result in the request for the service charge range and transmit it simultaneously.
- the service scan result and the service charge range request transmitted by the slave proxy device 10S are received by the master proxy device 10M.
- step S113 the master proxy 111 determines a service charge range based on the service scan result.
- the service scan result of the master proxy apparatus 10M itself and the service scan result of the new slave proxy apparatus 10S are obtained as the service scan results. Then, the master proxy 111 uses these service scan results to determine the service charge range of each FW proxy device 10 according to a predetermined policy (rule).
- all the services that can be received in the target area are mechanically allocated to the plurality of FW proxy devices 10, or the access frequency is taken into consideration of the end user viewing history.
- the access frequency is taken into consideration of the end user viewing history.
- the service responsibility range corresponding to the policy is determined using the capability attribute. May be. Thereby, for example, for the FW proxy device 10 having a high processing capability, it is possible to expand the range of the service in charge.
- the capability attribute for example, processing capability
- a proxy-service charge range database in which each FW proxy device 10 (master proxy 111 or slave proxy 161) is associated with a service charge range is generated and stored in the storage unit 103.
- step S114 the master proxy 111 notifies the slave proxy 161 of information indicating the service charge range determined in the process of step S113 (hereinafter referred to as service charge range information).
- step S114 the service charge range information transmitted by the master proxy device 10M is received by the slave proxy device 10S.
- step S126 the slave proxy 161 controls the tuner 151 on the basis of the service charge range information received from the master proxy device 10M, and prepares for tuning of the service in its own charge range. Here, preparation for channel selection of each service indicated by the service charge range information is performed.
- the master proxy device 10M is also prepared for tuning of the service in its own range (S115).
- service tuning may be performed in advance for the service in the assigned range (S127 in FIG. 8).
- step S103 the application 211 requests the service-MPD table from the master proxy 111.
- step S103 the service-MPD table request transmitted by the client device 20 is received by the master proxy device 10M via the network 30.
- step S116 the master proxy 111 generates a service-MPD table in response to the table request received from the client device 20, and returns the service-MPD table to the client device 20 via the network 30 as a response.
- the service-MPD table is a table in which services and MPD metadata are associated with each other.
- the service-MPD table is generated from the SLS.
- the service-MPD table is generated by the master proxy 111, but the service-MPD table may be generated by the SLS processing system 115.
- step S116 the service-MPD table transmitted by the master proxy device 10M is received by the client device 20 via the network 30.
- step S104 the application 211 refers to the service-MPD table received from the master proxy apparatus 10M, and requests the DASH segment from the master proxy 111 based on the MPD metadata corresponding to the desired service.
- step S104 the DASH segment request transmitted by the client apparatus 20 is received by the master proxy apparatus 10M via the network 30.
- step S117 the master proxy 111 determines allocation of the DASH segment request received from the client device 20 to the slave proxy 161 with reference to the proxy-service charge range database, and performs redirection according to the determination result. .
- the master proxy 111 redirects the DASH segment request from the client device 20 (the application 211) to the appropriate slave proxy 161.
- the request for the redirected DASH segment is directly notified from the master proxy 111 to the slave proxy 161.
- the master proxy 111 notifies the slave proxy 161 indirectly via the client device 20, so to speak. Details of segment request redirection will be described later with reference to FIGS.
- step S117 the DASH segment request redirected by the master proxy apparatus 10M is received by the slave proxy apparatus 10S in which the slave proxy 161 determined to be appropriate is operating.
- step S1208 the slave proxy 161 determines whether pre-service tuning is being performed.
- “NO” is determined in the determination process of step S128, and the process proceeds to step S129. .
- step S129 the slave proxy 161 controls the tuner 101 based on the DASH segment request received from the master proxy apparatus 10M, and tunes the service.
- the DASH segment file corresponding to the DASH segment request is acquired from the broadcast server 40 via the broadcast.
- step S127 when there is a surplus of resources and advance service tuning has been performed, the service stream in the assigned range obtained from the broadcast server 40 via broadcast has been developed. Therefore, the process of step S129 is skipped. In this case, a DASH segment file corresponding to the DASH segment request is acquired from the expanded stream.
- step S130 the slave proxy 161 returns the DASH segment file received from the broadcast server 40 to the client device 20 connected to the network 30 via the communication I / F 102.
- step S130 the DASH segment file transmitted (transferred) by the slave proxy apparatus 10S is received by the client apparatus 20 via the network 30.
- the browser 212 reproduces the DASH segment file received from the slave proxy device 10S (S105).
- the client device 20 reproduces content such as a program distributed via broadcasting.
- step S151 as in step S122 of FIG. 7, the slave proxy 161 operating in the new slave proxy apparatus 10S confirms the presence of the master proxy 111 operating in the master proxy apparatus 10M.
- An M-SEARCH request is sent by multicast to the device connected to.
- This M-SEARCH request is an HTTP request, and is used when searching for a device connected to the network 30 using a protocol that is SSDP.
- step S151 the M-SEARCH request transmitted by the slave proxy device 10S is received by the master proxy device 10M via the network 30.
- step S141 the UPnP / SSDP server 112 generates a device description URL in response to the M-SEARCH request received from the slave proxy device 10S, and uses the slave proxy device as an M-SEARCH response via the network 30. Send to 10S.
- This M-SEARCH response is a response to an M-SEARCH request, and includes a device description URL as LOCATION.
- This device description URL is a URL of an XML format file.
- the M-SEARCH response transmitted by the master proxy apparatus 10M in the process of step S141 is received by the slave proxy apparatus 10S via the network 30.
- step S152 the slave proxy 161, based on the M-SEARCH response (device description URL) received from the master proxy device 10M, the local web server 114 operating on the master proxy device 10M connected to the network 30. Request a device description.
- This device description request is an HTTP request, and the content according to the device description URL of the M-SEARCH response is described as the target resource of the GET method.
- step S152 the device description request transmitted by the slave proxy device 10S is received by the master proxy device 10M via the network 30.
- step S142 the local web server 114 generates a device description in response to the device description request received from the slave proxy device 10S, and transmits it as a response to the slave proxy device 10S via the network 30.
- FIG. 10 is a diagram illustrating an example of a device description response.
- serviceList element a list of services supported by the master proxy apparatus 10M is described.
- serviceList element one or a plurality of service elements are described.
- the service element information about one service among the supported services is described.
- the service element is an upper element such as a serviceType element, a serviceId element, an SCPDURL element, and a controlURL element.
- the serviceType element describes “urn: atsc: proxy” as the service type, which means that it is an ATSC 3.0 service proxy service.
- the serviceType element describes “urn: atsc: configMan” as the service type, which means that it is an ATSC 3.0 configuration management service.
- controlURL element “http://192.168.1.1:23456/getServiceScope” is described as the URL of the setting management API.
- This URL is information for calling the Web API for the master proxy 111 to acquire service charge range information.
- each service element since the address of the service description for the ACR client service is usually described in the SCPDURL element, the service description is acquired by the GET method defined by HTTP. In that case, the action is called by sending an action message to the URL described in the controlURL element by SOAP (Simple Object Access Access Protocol) defined by UPnP.
- SOAP Simple Object Access Access Protocol
- this technology proposes a method for disseminating the URL of the Web API using a method different from UPnP so that the Web API can be called more easily. That is, in this technique, as shown in FIG. 10, nothing is described as the value of the SCPDURL element (the contents of the SCPDURL element are left empty), and only when nothing is described in the SCPDURL element. Web API URL can be described directly in controlURL element.
- the contents of the SCPDURL element are emptied as described above, for example, a dummy character string is described in the controlURL element. It may be.
- step S142 the device description response transmitted by the master proxy apparatus 10M is received by the slave proxy apparatus 10S that transmitted the device description request.
- the service charge range information is acquired from the master proxy 111 operating in the master proxy device 10M based on the device description response received from the master proxy device 10M.
- the slave proxy 161 requests a service charge range from the master proxy 111 based on the URL of the device description response setting management API. Note that the processing of the slave proxy 161 corresponds to the processing of step S125 in FIG.
- FIG. 11 is a diagram illustrating an example of a service charge range request.
- service charge scope information that is “getServiceScope” is described as the target resource of the GET method.
- HOST “192.168.1.1:23456” is described as the host name.
- the target of the GET method is “getServiceScope” according to the contents (contents of the controlURL element) described in the device description response.
- the IP address of the master proxy apparatus 10M that is “192.168.1.1” and the port number of the master proxy 111 that is “23456” are described as HOST.
- Such a service charge range request is received by the master proxy apparatus 10M connected to the network 30. Then, the master proxy 111 generates service charge range information in response to the service charge range request received from the slave proxy device 10S, and transmits it as a response to the slave proxy device 10S via the network 30. Note that the processing of the master proxy 111 corresponds to the processing of steps S113 and S114 in FIG.
- service scan result obtained by the process of step S123 may be described in the body of the service charge range request.
- FIG. 12 is a diagram illustrating an example of a service charge range response.
- service charge range information In the body part of the service charge range response, a list of service IDs such as “ServiceId-A” and “ServiceId-B” is described as service charge range information. This list is a list in which character strings indicating service IDs are listed with line feeds.
- the master proxy 111 assigns the service A with the service ID “ServiceId-A” and the service B with the service ID “ServiceId-B” as the service charge range of the slave proxy 161.
- Such a service charge range response is received by the slave proxy device 10S connected to the network 30.
- the slave proxy device 10S prepares for service tuning based on the service charge range response (service charge range information) received from the master proxy device 10M.
- preparation for receiving the streams of service A and service B is performed by the slave proxy apparatus 10S.
- processing of the slave proxy 161 corresponds to the processing of step S126 in FIG.
- the master proxy apparatus 10M also prepares for service tuning (S115 in FIG. 7).
- the service charge range is assigned to the slave proxy apparatus 10S.
- FIG. 13 shows a more specific example of the service charge range assignment.
- service 1 Service-1
- service 2 Service-2
- service 3 Service-3
- service 4 Service-4
- service 5 Service-5
- service 6 Service-6
- Service-7 Service-7
- each service stream is identified by a service ID.
- Each service stream is transmitted as a broadcast stream (BS) that is identified by a broadcast stream ID. Further, in each service stream, a PLP (Physical Layer Layer) stream identified by the PLP ID is transmitted.
- BS broadcast stream
- PLP Physical Layer Layer
- broadcast stream 1 a stream of service 1 including PLP-1 and PLP-2 and a stream of service 2 including PLP3 are transmitted.
- broadcast stream 2 a stream of service 3 including PLP-1 and a stream of service 4 including PLP-2, PLP-3, and PLP-4 are transmitted.
- broadcast stream 3 (BS-3), a stream of service 5 including PLP-1 and a stream of service 6 including PLP-2 are transmitted.
- broadcast stream 4 (BS-4), the stream of the service 7 including PLP-1 is transmitted.
- the master proxy 111 operating in the master proxy apparatus 10M determines a service responsibility range of the master proxy 111 and the slave proxy 161 based on these service scan results.
- services 1 to 4 are assigned to the service charge range of the master proxy 111
- services 5 to 7 are assigned to the service charge range of the slave proxy 161.
- the service management range assignment is realized by the setting management API notified from the master proxy 111 to the slave proxy 161.
- a new slave proxy device 10S-2 is further connected to the network 30 in which the master proxy device 10M and the slave proxy device 10S-1 exist.
- slave proxy 161 that operates in the slave proxy device 10S-1
- slave proxy 161-1 abbreviated as “slave proxy 1” in the drawing
- slave proxy 161-2 abbreviated as “slave proxy 2” in the drawing
- steps S191 to S196 are executed by the master proxy apparatus 10M.
- the processing of steps S201 to S204 is executed by the slave proxy device 10S-1, and the processing of steps S211 to S216 is executed by the slave proxy device 10S-2.
- step S212 the slave proxy 161-2 checks the presence of the master proxy 111 via the communication I / F 152. Then, a presence confirmation message is transmitted by multicast to the devices connected to the network 30.
- the master proxy 111 In steps S191 and S192, the master proxy 111 generates a setting management API according to the message transmitted by multicast, and the slave proxy device 10S-1 and the slave proxy device 10S-2 via the network 30. Notify (re-notify).
- the slave proxy 161-2 controls the tuner 151 according to the notification from the master proxy apparatus 10M, and scans the service.
- a service scan result indicating a service receivable by the slave proxy apparatus 10S-2 is obtained from SLT metadata transmitted as LLS.
- the service is rescanned according to the notification from the master proxy device 10M, and the service scan result is obtained (S201). Also, in the master proxy apparatus 10M in which the master proxy 111 operates, the service is rescanned and the service scan result is obtained (S193).
- the master proxy device 10M and the slave proxy device 10S-1 perform the service scan at the timing when the slave proxy device 10S-2 performs the service scan.
- the slave proxy 161-2 When the service scan (S213) is completed, the slave proxy 161-2 notifies the master proxy 111 of the service scan result and requests a service charge range (S214, S215).
- the slave proxy 161-1 notifies the master proxy 111 of the service scan result and requests a service charge range (S202, S203).
- the service scan result and the service charge range request transmitted by the slave proxy devices 10S-1 and 10S-2 are received by the master proxy device 10M.
- step S194 the master proxy 111 determines a service charge range based on the service scan result.
- the service scan result of the master proxy apparatus 10M itself, the service scan result of the existing slave proxy apparatus 10S-1, and the service scan result of the new slave proxy apparatus 10S-2 are obtained as the service scan results. . Then, the master proxy 111 uses these service scan results to determine the service charge range of each FW proxy device 10 according to a predetermined policy (rule).
- a proxy-service charge range database in which each FW proxy device 10 (master proxy 111 or slave proxy 161-1, 161-2) is associated with a service charge range is generated and stored in the storage unit 103. Details of the policy will be described later with reference to FIGS.
- step S195 the master proxy 111 notifies the slave proxy 161-1 and the slave proxy 161-2 of the service charge range obtained by the process in step S194.
- the tuner 151 is controlled on the basis of the service charge range information from the master proxy device 10M to prepare for tuning of the service in its own charge range. Performed (S216).
- the slave proxy device 10S-1 in which the slave proxy 161-2 operates preparation for tuning of the service in its own service range is performed according to the service service range information from the master proxy device 10M (S204). ). Further, the master proxy apparatus 10M also prepares for tuning of the service in its own range (S196).
- each FW proxy device 10 connected to the network 30 is ready for tuning of the service in its own area, and in response to the DASH segment request from the client device 20, The FW proxy device 10 is compatible.
- FIG. 15 shows a more specific example of assignment of the service charge range.
- the relationship among the broadcast stream, service stream, and PLP stream in FIG. 15 is the same as in FIG.
- services 1 and 2 are assigned to the service charge range of the master proxy 111
- services 3 to 6 are assigned to the service charge range of the slave proxy 161-1
- Services 5 to 7 are assigned to the service charge range of the slave proxy 161-2.
- the services 5 and 6 are overlapped by the slave proxy 161-1 and the slave proxy 161-2, but for example, the services 5 and 6 may be selected (tuned). In the case of a large size, such assignment range can be assigned. However, as in the example of FIG. 13, the master proxy 111 and the slave proxy 161 may not have overlapping service areas.
- segment request redirection process is the same as the process shown in FIG. 8, and therefore, the description thereof is omitted here.
- step S221 the UPnP / SSDP server 112 generates a device description URL in response to the M-SEARCH request received from the slave proxy device 10S-2, and sends it as a NOTIFY message via the network 30 to the slave proxy device. 10S-1.
- FIG. 17 is a diagram showing an example of the NOTIFY message.
- the IP address assigned to the master proxy device 10M is “192.168.1.1” in the device description URL. ", And port number" 12345 "assigned to the local web server 114 is described.
- step S231 the slave proxy 161-1 operates in the master proxy apparatus 10M connected to the network 30 based on the NOTIFY message (device description URL) from the master proxy apparatus 10M. Request a device description from the local web server 114.
- This device description request is an HTTP request, and the content corresponding to the device description URL of the NOTIFY message is described as the target resource of the GET method.
- step S222 the local web server 114 generates a device description in response to the device description request from the slave proxy device 10S-1, and sends it as a response to the slave proxy device 10S-1 via the network 30. Send.
- the contents of the device description response are as shown in FIG.
- the slave proxy device 10S-1 acquires the service charge range information from the master proxy 111 based on the device description response received from the master proxy device 10M.
- automatic setting methods include a method using a DHCP (Dynamic Host Configuration Protocol) server and a method using a WPAD (Web Proxy Auto Discovery).
- automatic setting using a proxy setting script prepares a proxy automatic configuration script file written in a script language such as JavaScript (registered trademark) and places the file on the web server, while changing the URL of the file.
- the URL of the script for automatic setting of the browser 212 may be set.
- the browser 212 When using WPAD, the browser 212 itself can automatically perform setting by automatically detecting and downloading the location (URL) of the script file for proxy setting.
- WPAD in general, find the entry with the name "wpad” by using the DHCPINFORM message of the DHCP server and the method using DNS (Domain) Name System), and download the proxy setting script from there. A method has been implemented.
- the client device 20 finds a master proxy device 10M in which the master proxy 111 is operating in the network 30, and the master proxy 111 waits for a request and an IP address and port number (hereinafter, proxy standby address / We propose a method to acquire (also called port).
- this Web API is an interface for calling services.
- SSDP Universal Plug and Play
- SSDP an XML format file that describes functions and information that can be provided by a device is used as a device description that is exchanged when discovering a public service.
- this file a device description describing the target device itself and a service description as an action of each service installed on the target device are described.
- the description of the master proxy 111 can describe the URL of the Web API that returns the IP address and port number (proxy waiting address / port) on which the master proxy 111 waits for a request. To do.
- the browser 212 can be used by a general client device 20 that does not implement the broadcast service.
- Proxy proxy address / port can be set as proxy.
- a certain script (Web API) is launched in the browser 212 of a general client device 20 (general end device such as a smartphone or a tablet computer) that does not implement a broadcast service
- the server corresponds to the broadcast service.
- the master proxy device 10M is discovered, and the proxy standby address / port of the master proxy 111 operating there can be set as the proxy of the browser 212.
- SSDP has been described as an example of a protocol for searching for and responding to devices on the network.However, similar functions can be realized by using other protocols such as DIAL (Discovery and Launch). it can.
- DIAL is a protocol that uses UPnP to discover DIAL-compatible devices on the network and launch specified applications.
- FIG. 18 is a flowchart for explaining the flow of the master proxy setting process corresponding to the process of step S102 of FIG.
- the UPnP / SSDP server 112 has a port number of “12345”
- the proxy application manager 113 has a port number of “23456”
- the master proxy 111 has Are assigned port numbers of “34567”.
- steps S281 to S282 and the process of step S291 are executed by the master proxy apparatus 10M.
- the processing of steps S271 to S274 is executed by the client device 20.
- step S271 the application 211 confirms the presence of the master proxy 111 operating in the master proxy apparatus 10M with respect to a device (server) connected to the network 30 via the communication I / F 201. Send a SEARCH request by multicast.
- step S271 the M-SEARCH request transmitted by the client device 20 is received by the master proxy device 10M via the network 30.
- step S281 the UPnP / SSDP server 112 generates a device description URL in response to the M-SEARCH request received from the client apparatus 20, and transmits it as an M-SEARCH response to the client apparatus 20 via the network 30. .
- step S281 the M-SEARCH response transmitted by the master proxy apparatus 10M is received by the client apparatus 20 that transmitted the M-SEARCH request.
- step S272 the application 211 requests the device description from the UPnP / SSDP server 112 based on the M-SEARCH response (the device description URL) received from the master proxy apparatus 10M.
- step S272 the device description request transmitted by the client apparatus 20 is received by the master proxy apparatus 10M via the network 30.
- step S282 the UPnP / SSDP server 112 (local web server 114) generates a device description in response to the device description request received from the client device 20, and sends it to the client device 20 via the network 30 as a response. Send.
- serviceType element “urn: atsc: proxy” is described as the service type, which means that it is a proxy service of the ATSC 3.0 service.
- serviceId element “urn: UPnP: serviceId: 1234” is described as the service ID and represents the service ID of the proxy service.
- step S282 the device description response transmitted by the master proxy apparatus 10M is received by the client apparatus 20 that transmitted the device description request.
- step S273 the application 211 sets the proxy standby address / port to the proxy application manager 113 based on the device description response (the proxy standby address / port acquisition Web API URL) received from the master proxy device 10M. Request.
- FIG. 19 is a diagram showing an example of a proxy standby address / port request.
- the target proxy standby address / port that is "getATSC3.0ProxyAddressPort" is described as the target resource of the GET method.
- “192.168.1.1:23456” is described as the host name.
- the target of the GET method is “getATSC3.0ProxyAddressPort” according to the contents described in the device description response (the contents of the controlURL element).
- the IP address of the master proxy apparatus 10M that is “192.168.1.1” and the port number of the proxy application manager 113 that is “23456” are described.
- the proxy standby address / port request transmitted by the client apparatus 20 is received by the master proxy apparatus 10M via the network 30 in the process of step S273.
- step S291 the proxy application manager 113 generates a proxy standby address / port in response to the proxy standby address / port request received from the client device 20, and transmits it as a response to the client device 20 via the network 30.
- FIG. 20 is a diagram showing an example of the proxy standby address / port response.
- the body part of the response includes “192.168.1.1” that is the IP address assigned to the master proxy device 10M and “34567” that is the port number assigned to the master proxy 111. "Is described.
- the proxy application manager 113 receives a request to the Web API (proxy standby address / port request), but the master proxy 111 main body receives the request and performs processing. You may make it do.
- step S291 the proxy standby address / port response transmitted by the master proxy apparatus 10M is received by the client apparatus 20 that has transmitted the proxy standby address / port request.
- step S274 the application 211 updates the proxy automatic configuration script and starts (restarts) the browser 212 based on the proxy standby address / port response (its IP address and port number) received from the master proxy apparatus 10M. Reflect the configuration change by.
- the application 211 In the client device 20, the application 211 generates a proxy automatic configuration script file based on the IP address and port number (ATSC3.0ProxyAddressPort (192.168.1.1:34567)) obtained as the proxy standby address / port from the proxy standby address / port response. rewrite.
- IP address and port number ATSC3.0ProxyAddressPort (192.168.1.1:34567)
- the proxy automatic configuration script file is rewritten by the proxy standby address / port by the application 211, and the browser 212 is activated (reactivated). Then, setting (automatic setting) of the IP address and port number of the master proxy 111 is performed by the proxy automatic configuration script file referred to by the browser 212.
- the browser 212 can access the master proxy 111 operating in the master proxy device 10M via the network 30.
- FIG. 21 is a diagram illustrating an example of assignment of a mechanical service area.
- broadcast stream 1 In broadcast stream 1 (BS-1), streams 1 to 4 are transmitted.
- broadcast stream 2 In the broadcast stream 2 (BS-2), streams of services 5 to 7 are transmitted.
- broadcast stream 3 In the broadcast stream 3 (BS-3), streams of services 8 to 10 are transmitted.
- the streams of services 11 to 14 are transmitted. Further, in the broadcast stream 5 (BS-5), the streams of services 15 to 19 are transmitted.
- the master proxy 111 operating in the master proxy apparatus 10M determines the service responsibility range of the master proxy 111 and the slave proxies 161-1 and 161-2 according to a predetermined policy. decide.
- a service charge range is mechanically assigned to the master proxy 111 and the slave proxies 161-1 and 161-2 in units of broadcast streams (for example, a unit of a frequency band of 6 MHz).
- services 1 to 4 of the broadcast stream 1 (BS-1) are assigned to the service charge range of the master proxy 111. Also, services 5 to 7 of the broadcast stream 2 (BS-2) and services 8 to 10 of the broadcast stream 3 (BS-3) are assigned to the service charge range of the slave proxy 161-1.
- services 11 to 14 of the broadcast stream 4 (BS-4) and services 15 to 19 of the broadcast stream 5 (BS-5) are assigned to the service charge range of the slave proxy 161-2.
- the unit for assigning the service charge range mechanically is not limited to the broadcast stream unit, for example, a service unit. Other units may be used.
- the service charge range is mechanically determined in a predetermined unit such as a broadcast stream unit or a service unit with respect to the master proxy 111 and the slave proxy 161. Can be used.
- FIG. 22 is a diagram showing an example of assignment of a responsible range according to the access frequency of a service.
- the master proxy 111 operating in the master proxy apparatus 10M determines the service responsibility range of the master proxy 111 and the slave proxies 161-1 and 161-2 according to a predetermined policy. decide.
- a service charge range is assigned to the master proxy 111 and slave proxies 161-1 and 161-2 in consideration of the viewing history of the end user's content.
- FIG. 22 shows a graph showing the access frequency for each service (squares with hatching in the figure). This indicates that the service is frequent. For example, in the broadcast stream 1 (BS-1), the access frequency of the services 1 and 3 is high and the access frequency of the service 4 is low. Further, the access frequency of the service 2 is an intermediate frequency between those services.
- BS-1 broadcast stream 1
- the access frequency of the services 1 and 3 is high and the access frequency of the service 4 is low.
- the access frequency of the service 2 is an intermediate frequency between those services.
- services 1 to 4 of the broadcast stream 1 (BS-1) and services 5 of the broadcast stream 2 (BS-2) 5 6 is assigned to the service charge range of the master proxy 111.
- service 7 of broadcast stream 2 (BS-2), services 8 and 10 of broadcast stream 3 (BS-3), services 11 and 12 of broadcast stream 4 (BS-4), and broadcast stream 5 (BS The service 15 of -5) is assigned to the service charge range of the slave proxy 161-1.
- the service 9 of the broadcast stream 3 (BS-3), the services 13 and 14 of the broadcast stream 4 (BS-4), and the services 16 to 19 of the broadcast stream 5 (BS-5) are slave slaves 161-2. Assigned to the service area.
- services with high access frequency such as services 1 and 3 of broadcast stream 1, service 6 of broadcast stream 2, services 11 and 12 of broadcast stream 4, and services 15, 17 and 19 of broadcast stream 5 are provided.
- the master proxy 111 and the slave proxies 161-1 and 161-2 are allocated almost equally, and the load is distributed according to the access frequency of the service.
- the service charge so that a service with high access frequency is preferentially load-balanced with respect to the master proxy 111 and the slave proxy 161. Rules that assign ranges can be used.
- FIG. 23 is a diagram illustrating an example of assignment of a responsible range for each broadcast stream (BS) according to the access frequency of the service.
- the master proxy 111 operating in the master proxy apparatus 10M determines the service responsibility range of the master proxy 111 and the slave proxies 161-1 and 161-2 according to a predetermined policy. decide.
- a service charge range is assigned to the master proxy 111 and slave proxies 161-1 and 161-2 in consideration of the viewing history of the end user's content.
- FIG. 23 a graph (a hatched square in the figure) representing the access frequency (total of service access frequencies) for each broadcast stream (BS) is shown.
- a broadcast stream having a wider direction width indicates a broadcast stream having a higher access frequency.
- the broadcast stream 5 has the highest access frequency among the broadcast streams 1 (BS-1) to 5 (BS-5), and the access frequency decreases in the order of the broadcast streams 1, 4, 2, and 3.
- services 1 to 4 of the broadcast stream 1 (BS-1) and services 11 to 14 of the broadcast stream 4 (BS-4) are assigned to the service charge range of the slave proxy 161-1.
- the services 15 to 19 of the broadcast stream 5 (BS-5) are assigned to the service charge range of the slave proxy 161-2.
- the broadcast stream 5 having the highest access frequency is assigned to the slave proxy 161-2, and the remaining broadcast streams 1 to 4 are almost equally distributed to the master proxy 111 and the slave proxy 161-1. Allocation is performed and load distribution is performed according to the access frequency of the broadcast stream.
- a service is performed so that a broadcast stream having a high access frequency is preferentially load-balanced with respect to the master proxy 111 and the slave proxy 161. Rules can be used to assign areas of responsibility.
- the stream data of the service group transmitted in the broadcast stream having the same broadcast stream ID can be processed (acquired) at the same time, by performing load distribution according to the access frequency of the broadcast stream, the stream is distributed. Services that can simultaneously acquire these data will be aggregated. Then, a group of services that can simultaneously acquire stream data can be collected, for example, to speed up channel zapping.
- the broadcast stream 5 with a high access frequency is assigned to the slave proxy 161-1 and the slave proxy 161-2 (the two FW proxy devices 10), and the remaining broadcast streams 1 to 4 are Assigned to the master proxy 111.
- the access frequency of a specific broadcast stream is extremely high, appropriate load distribution is performed.
- policies for determining the service charge range has been described above. However, these policies are only examples, and other policies may be used as long as the service charge range capable of optimal load distribution can be assigned. A policy may be used.
- the end user can set which of these policies is used. For example, by causing the policy setting screen to be presented to the FW proxy device 10 or the client device 20, the end user operates the setting screen (user interface (UI: User Interface)), A desired policy can be set.
- the policy setting is not limited to an end user operation, and for example, past data may be stored and set using a method such as machine learning.
- each FW proxy device 10 when each FW proxy device 10 exists in a close position, the service scan result for each FW proxy device 10 is likely to be the same, but depending on the operation, each FW proxy device 10 may be located at a remote position. In such a case, the service scan result for each FW proxy device 10 may not be the same, and such a positional relationship may be taken into consideration.
- a slave proxy device 10S or a dedicated server may be installed and managed.
- the master proxy 111 acquires viewing history information from another server connected to the network 30 when the service charge range is determined.
- the service charge range is also assigned to the master proxy 111.
- the service charge range assignment process, the request redirection process, and the like are performed without assigning the service charge range to the master proxy 111. Only processing may be performed.
- the master proxy apparatus 10M in which the master proxy 111 operates does not need to receive a content stream, and therefore, a dedicated server or the like that does not have a tuner can be used.
- FIG. 25 is a diagram illustrating an example of a topology when the network 30 is a home LAN or the like.
- a master proxy device 10M, a slave proxy device 10S-1, a slave proxy device 10S-2, a client device 20-1, a client device are connected to a network 30 such as a home LAN in the end user home 2. 20-2 and the client device 20-3 are connected.
- the master proxy 111 operating in the master proxy apparatus 10M causes the slave proxy 161-1 operating in the slave proxy apparatus 10S-1 and the slave proxy 161-2 operating in the slave proxy apparatus 10S-2 to A service area is assigned.
- services 1 to 14 are assigned to the master proxy 111 as a service charge range.
- services 15 to 19 are assigned to the slave proxy 161-1 and services 15 to 19 are assigned to the slave proxy 161-2.
- the allocation of the service charge range is the same as the allocation according to the access frequency for each broadcast stream shown in FIG.
- the master proxy 111 refers to the proxy-service charge range database and determines that the master proxy 111 is responsible for the request for the DASH segment of the service 7.
- the DASH segment file of service 7 distributed via broadcast is processed and transmitted to the client device 20-1.
- the content distributed by the service 7 is reproduced in the client device 20-1.
- the request for the DASH segment of the service 15 is transmitted to the master proxy device 10M.
- the master proxy 111 determines that the slave proxy 161-1 (or the slave proxy 161-2) is in charge of the DASH segment request of the service 15 with reference to the proxy-service charge range database.
- the master proxy 111 redirects the request for the DASH segment of the service 15 to the slave proxy 161-1.
- the slave proxy device 10S-1 the DASH segment file of the service 15 distributed via broadcasting is processed and transmitted to the client device 20-2. As a result, the content distributed by the service 15 is reproduced in the client device 20-2.
- the request for the DASH segment of the service 15 is transmitted to the master proxy device 10M.
- the master proxy 111 determines that the slave proxy 161-2 (or the slave proxy 161-1) is in charge of the DASH segment request of the service 15 with reference to the proxy-service charge range database.
- the master proxy 111 redirects the DASH segment request of the service 15 to the slave proxy 161-2.
- the slave proxy apparatus 10S-2 the DASH segment file of the service 15 distributed via the broadcast is processed and transmitted to the client apparatus 20-3. As a result, the content distributed by the service 15 is reproduced in the client device 20-3.
- the master proxy device 10M and the slave proxy devices 10S-1 and 10S-2. May be installed in, for example, a cable operator head end or a mobile network base station, to cover a wider area (wide LAN segment).
- client devices 20-1 to 20- such as a television receiver or a personal computer are used.
- 3 is installed not in the same end user's home but in each end user's home which has contracted the service of the cable television.
- client devices 20-1 to 20-3 such as smartphones and tablet computers are used. Is a device that is owned indoors or outdoors by an end user with a mobile service contract.
- FIG. 26 is a diagram illustrating an example of topology when the network 30 is wireless communication between vehicles.
- a master proxy device 10M, a slave proxy device 10S-1, and a slave proxy device 10S-2 as in-vehicle devices installed in each vehicle are connected to a network 30 by wireless communication between the vehicles. ing.
- the network 30 is connected to client devices 20-4 to 20-12 such as smartphones and head-mounted displays possessed by the end user.
- a master proxy 111 operating in a master proxy device 10M in a certain car makes a slave proxy 161-1 operating in a slave proxy device 10S-1 in another car and a slave proxy in another car.
- a service charge range is assigned to the slave proxy 161-2 operating on the device 10S-2.
- services 1 to 4 are assigned to the master proxy 111 as a service charge range.
- services 5 to 10 are assigned to the slave proxy 161-1, and services 11 to 19 are assigned to the slave proxy 161-2.
- the request for the DASH segment of the service 1 is transmitted to the master proxy device 10M.
- the master proxy 111 determines that it (master proxy 111) is in charge of the request for the DASH segment of the service 1 with reference to the proxy-service charge range database.
- the DASH segment file of service 1 distributed via broadcasting is processed and transmitted to the client device 20-5.
- the content distributed by the service 1 is reproduced in the client device 20-5.
- the request for the DASH segment of the service 10 is transmitted to the master proxy device 10M.
- the master proxy 111 refers to the proxy-service charge range database and determines that the slave proxy 161-1 is responsible for the DASH segment request of the service 10.
- the master proxy 111 redirects the request for the DASH segment of the service 10 to the slave proxy 161-1.
- the slave proxy device 10S-1 the DASH segment file of the service 10 distributed via broadcasting is processed and transmitted to the client device 20-8. As a result, the content distributed by the service 10 is reproduced in the client device 20-8.
- the request for the DASH segment of the service 15 is transmitted to the master proxy device 10M.
- the master proxy 111 refers to the proxy-service charge range database and determines that the slave proxy 161-2 is responsible for the DASH segment request of the service 15.
- the master proxy 111 redirects the DASH segment request of the service 15 to the slave proxy 161-2.
- the slave proxy device 10S-2 the DASH segment file of the service 15 distributed via broadcast is processed and transmitted to the client device 20-11. As a result, the content distributed by the service 15 is reproduced in the client device 20-11.
- FIG. 27 shows another configuration example of the transmission system.
- the transmission system 6 in FIG. 27 differs from the transmission system 1 in FIG. 1 in that a communication system communication server 70 is provided on the transmission side in addition to the broadcast system broadcast server 40.
- the FW proxy apparatus 10 has a communication function (communication I / F (not shown)) connectable to the Internet 80 as well as a reception function for receiving broadcast waves transmitted via the broadcast transmission path 60.
- the FW proxy device 10 is connected to the communication server 70 via the Internet 80 and can perform communication.
- the FW proxy device 10 transmits a request from the client device 20 connected to the network 30 to the communication server 70 connected to the Internet 80. Further, the FW proxy device 10 receives the content stream transmitted from the communication server 70 via the Internet 80 and transmits (transfers) the content stream to the client device 20 connected to the network 30.
- the master proxy device 10M in which the master proxy 111 operates assigns a service responsibility range to each FW proxy device 10. It is as described above.
- the client device 20 connected to the network 30 passes through the broadcast or communication via the FW proxy device 10 (master proxy device 10M or slave proxy device 10S) in accordance with an end user operation or the like.
- the content distributed by can be played back.
- the communication server 70 is a server provided by, for example, a broadcaster such as a broadcasting station or other operators, and is connected to the Internet 80.
- the communication server 70 processes content files such as programs and CMs and control information in response to a request from the FW proxy device 10, and transmits the resulting data via the Internet 80 (streaming distribution).
- the broadcast server 40 and the communication server 70 may distribute not only contents such as programs but also applications and the like.
- the application is distributed via broadcast or communication, and is received by the client device 20 via the FW proxy device 10.
- the FW proxy device 10 has shown a configuration in which at least a stream of content distributed via broadcasting is processed.
- the communication server 70 may be provided, and the FW proxy device 10 may process only the content stream distributed via communication.
- the client device 20 reproduces only the content distributed via communication.
- ATSC Advanced Television System
- DVB Digital Video Broadcasting
- the present invention is not limited to the IP transmission method and is applied to other methods such as an MPEG2-TS (Transport Stream) method. You may do it.
- Digital broadcasting standards include terrestrial broadcasting, satellite broadcasting using broadcasting satellites (BS: Broadcasting : Satellite) and communication satellites (CS: Communications Satellite), cable TV (CATV: CommonVAntennantTeleVision), etc. It can be applied to standards such as cable broadcasting.
- BS Broadcasting : Satellite
- CS Communications Satellite
- CATV CommonVAntennantTeleVision
- the DASH player can be used in, for example, an application developed in a markup language such as HTML5 (HyperText Markup Language 5) or a script language such as JavaScript (registered trademark), or in a programming language such as Java (registered trademark). It can be a developed application. Further, this application is not limited to an application executed by a browser, but may be executed as a so-called native application in an operating system (OS: Operating System) environment or the like.
- OS Operating System
- the application may not only explicitly display some information but also be operated in a non-display (in the background) (may be started without being recognized by the end user).
- the content can include any content such as an electronic book, a game, and an advertisement.
- FIG. 28 is a diagram illustrating a configuration example of the hardware of a computer that executes the above-described series of processing by a program.
- a CPU Central Processing Unit
- ROM Read Only Memory
- RAM Random Access Memory
- An input / output interface 1005 is further connected to the bus 1004.
- An input unit 1006, an output unit 1007, a recording unit 1008, a communication unit 1009, and a drive 1010 are connected to the input / output interface 1005.
- the input unit 1006 includes a keyboard, a mouse, a microphone, and the like.
- the output unit 1007 includes a display, a speaker, and the like.
- the recording unit 1008 includes a hard disk, a nonvolatile memory, and the like.
- the communication unit 1009 includes a network interface or the like.
- the drive 1010 drives a removable recording medium 1011 such as a magnetic disk, an optical disk, a magneto-optical disk, or a semiconductor memory.
- the CPU 1001 loads the program recorded in the ROM 1002 or the recording unit 1008 to the RAM 1003 via the input / output interface 1005 and the bus 1004 and executes the program. A series of processing is performed.
- the program executed by the computer 1000 can be provided by being recorded on a removable recording medium 1011 as a package medium, for example.
- the program can be provided via a wired or wireless transmission medium such as a local area network, the Internet, or digital satellite broadcasting.
- the program can be installed in the recording unit 1008 via the input / output interface 1005 by attaching the removable recording medium 1011 to the drive 1010.
- the program can be received by the communication unit 1009 via a wired or wireless transmission medium and installed in the recording unit 1008.
- the program can be installed in the ROM 1002 or the recording unit 1008 in advance.
- the processing performed by the computer according to the program does not necessarily have to be performed in chronological order in the order described as the flowchart. That is, the processing performed by the computer according to the program includes processing executed in parallel or individually (for example, parallel processing or object processing).
- the program may be processed by a single computer (processor) or may be distributedly processed by a plurality of computers.
- the present technology can take the following configurations.
- a proxy that receives a stream of content distributed for each of a plurality of services and transmits it to a client device connected to the network.
- the proxy functions as a master proxy for a slave proxy and is predetermined for each proxy.
- An information processing apparatus including a processing unit that determines a service charge range according to a policy.
- the information processing apparatus determines a service charge range so that a stream with high access frequency is preferentially load-balanced.
- the processing unit determines a service charge range so that a stream with high access frequency is preferentially load-balanced.
- the processing unit notifies, for each slave proxy, range information indicating a service handled by each slave proxy.
- the processing unit notifies the slave proxy of the responsible range information when an API (Application Programming Interface) for acquiring the responsible range information is executed by the slave proxy.
- the processor is Generate a database that associates each proxy with the service area, When a service request is received from the client device, the service request is redirected to the proxy in charge of the service by referring to the database (1) to (10) The information processing apparatus described in 1.
- the information processing apparatus according to any one of (1) to (11), wherein the policy is set by an end user. (13) In the information processing apparatus in which the master proxy operates and the other information processing apparatus in which the slave proxy operates, preparation for receiving a service corresponding to the own service area when the service service area is determined The information processing apparatus according to any one of (1) to (12). (14) The information processing apparatus according to any one of (1) to (13), wherein a plurality of other information processing apparatuses on which the slave proxy operates are installed on the network. (15) It further comprises a receiver for receiving broadcast waves, The information processing apparatus according to any one of (1) to (14), wherein the processing unit transmits the stream of the content distributed via broadcast to the client apparatus via the network.
- the information processing apparatus is A proxy that receives a stream of content distributed for each of a plurality of services and transmits it to a client device connected to the network.
- the proxy functions as a master proxy for a slave proxy and is predetermined for each proxy.
- An information processing method including a step of determining a service responsibility range according to a policy.
- the first information processing apparatus includes: A proxy that receives a stream of content distributed for each of a plurality of services and transmits the stream to the client device connected to the network, and functions as the master proxy for the slave proxy, It has a processing unit that determines the scope of service in accordance with a predetermined policy,
- the second information processing apparatus A proxy that receives a stream of content distributed for each of a plurality of services and transmits the content stream to the client device connected to the network, and functions as the slave proxy for the master proxy, and is determined by the master proxy
- An information processing system comprising a processing unit that processes a stream of content distributed by a service according to the assigned range.
- 1,6 transmission system 10-1 to 10-M, 10 FW proxy device, 10M master proxy device, 10S slave proxy device, 20-1 to 20-M, 20 client device, 30 network, 40 broadcast server, 50 transmitting stations, 60 broadcast transmission paths, 70 communication servers, 80 Internet, 100 processing units, 101 tuners, 102 communication I / Fs, 103 storage units, 111 master proxies, 112 UPnP / SSDP servers, 113 proxy application managers, 114 locals Web server, 115 SLS processing system, 150 processing unit, 151 tuner, 152 communication I / F, 153 storage unit, 161 slave proxy, 162 SLS processing system, 200 processing unit, 201 I / F, 202 display unit, 203 a speaker, 211 application, 212 browser 1000 computer, 1001 CPU
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Abstract
Description
2.本技術の概要
3.マスタプロキシとスレーブプロキシの関係によるFWプロキシ装置の負荷分散
(1)新規のスレーブ・プロキシ装置が追加される場合の例
(2)新規のスレーブ・プロキシ装置がさらに追加される場合の例
(3)クライアント装置によるマスタプロキシの発見・接続の例
4.マスタプロキシとスレーブプロキシの実装例
(1)機械的なサービス担当範囲の割り当ての例
(2)サービスのアクセス頻度に応じた担当範囲の割り当ての例
(3)サービスのアクセス頻度に応じたBSごとの担当範囲の割り当ての例
(4)マスタプロキシとスレーブプロキシのトポロジの例
5.変形例
6.コンピュータの構成
図1は、本技術を適用した伝送システムの一実施の形態の構成を示す図である。なお、システムとは、複数の装置が論理的に集合したものをいう。
図2は、図1のFWプロキシ装置10のうち、マスタ・プロキシ装置10Mの構成例を示す図である。
図3は、図1のFWプロキシ装置10のうち、スレーブ・プロキシ装置10Sの構成例を示す図である。
図4は、図1のクライアント装置20の構成例を示す図である。
図5は、本技術のIP伝送方式のプロトコルスタックの例を示す図である。
まず、図7及び図8のフローチャートを参照して、新規のスレーブ・プロキシ装置10Sが追加される場合における、プロキシのサービス担当範囲の割り当てと、セグメントリクエストのリダイレクションの一連の処理の流れを説明する。
次に、図9のフローチャートを参照して、スレーブプロキシ161からの存在確認に応じたマスタプロキシ111による設定管理APIの通知の詳細を説明する。すなわち、図9のフローチャートに示した処理は、上述の図7のステップS122,S111の処理に対応したものとなる。
次に、図14のフローチャートを参照して、新規のスレーブ・プロキシ装置10Sがさらに追加される場合における、プロキシのサービス担当範囲の割り当て処理の流れを説明する。
次に、図16のフローチャートを参照して、マスタプロキシ111による既存のスレーブプロキシ161-1に対する設定管理APIの再通知の詳細を説明する。すなわち、図16のフローチャートに示した処理は、上述の図14のステップS192の処理に対応したものとなる。
図18は、図8のステップS102の処理に対応するマスタプロキシ設定処理の流れを説明するフローチャートである。
図25は、ネットワーク30が、家庭内LAN等の場合におけるトポロジの例を示す図である。
図26は、ネットワーク30が、車両間の無線通信の場合におけるトポロジの例を示す図である。
上述した図1の伝送システム1においては、コンテンツのストリームが、放送伝送路60を介して放送経由で配信される場合を説明したが、コンテンツのストリームは、インターネット等の通信伝送路を介して通信経由で配信されるようにしてもよい。
上述した説明としては、デジタル放送の規格として、米国等で採用されている方式であるATSC(特に、ATSC3.0)を説明したが、本技術は、日本等が採用する方式であるISDB(Integrated Services Digital Broadcasting)や、欧州の各国等が採用する方式であるDVB(Digital Video Broadcasting)などに適用するようにしてもよい。また、上述した説明では、IP伝送方式が採用されるATSC3.0を例にして説明したが、IP伝送方式に限らず、例えば、MPEG2-TS(Transport Stream)方式等の他の方式に適用するようにしてもよい。
上述した制御情報(シグナリング)などの名称は、一例であって、他の名称が用いられる場合がある。ただし、これらの名称の違いは、形式的な違いであって、対象の制御情報やパケットなどの実質的な内容が異なるものではない。例えば、USBD(User Service Bundle Description)は、USD(User Service Description)と称される場合がある。また、例えば、NRT(Non Real Time)は、LCC(Locally Cached Content)などと称される場合がある。
複数のサービスごとに配信されるコンテンツのストリームを受信して、ネットワークに接続されたクライアント装置に送信するプロキシであって、スレーブプロキシに対するマスタプロキシとして機能し、各プロキシに対して、あらかじめ定められたポリシに応じたサービスの担当範囲を決定する処理部を備える
情報処理装置。
(2)
前記処理部は、各プロキシが稼働する情報処理装置にて受信可能なサービスを示すサービススキャン結果に基づいて、前記ポリシに応じたサービスの担当範囲を決定する
(1)に記載の情報処理装置。
(3)
前記処理部は、各プロキシが稼働する情報処理装置の能力属性に基づいて、前記ポリシに応じたサービスの担当範囲を決定する
(2)に記載の情報処理装置。
(4)
前記ポリシは、各プロキシに対し、ストリーム単位又はサービス単位で、サービスの担当範囲を割り当てる規則である
(2)又は(3)に記載の情報処理装置。
(5)
前記ポリシは、エンドユーザのコンテンツの視聴履歴に基づいて、サービスの担当範囲を割り当てる規則である
(2)乃至(4)のいずれかに記載の情報処理装置。
(6)
前記処理部は、アクセス頻度の高いサービスが、優先的に負荷分散されるように、サービスの担当範囲を決定する
(5)に記載の情報処理装置。
(7)
前記処理部は、コンテンツのストリームのデータを同時に取得できるサービスが集約されるように、サービスの担当範囲を決定する
(5)に記載の情報処理装置。
(8)
前記処理部は、アクセス頻度の高いストリームが、優先的に負荷分散されるように、サービスの担当範囲を決定する
(7)に記載の情報処理装置。
(9)
前記処理部は、前記スレーブプロキシごとに、各スレーブプロキシの担当するサービスを示す担当範囲情報を通知する
(2)乃至(8)のいずれかに記載の情報処理装置。
(10)
前記処理部は、前記スレーブプロキシにより、前記担当範囲情報を取得するためのAPI(Application Programming Interface)が実行された場合に、前記担当範囲情報を、前記スレーブプロキシに通知する
(9)に記載の情報処理装置。
(11)
前記処理部は、
各プロキシと、サービスの担当範囲とを対応付けたデータベースを生成し、
前記クライアント装置から、サービスのリクエストを受けた場合、前記データベースを参照して、当該サービスを担当するプロキシに対し、当該サービスのリクエストがリダイレクションされるようにする
(1)乃至(10)のいずれかに記載の情報処理装置。
(12)
前記ポリシは、エンドユーザにより設定される
(1)乃至(11)のいずれかに記載の情報処理装置。
(13)
前記マスタプロキシが稼働する情報処理装置と、前記スレーブプロキシが稼働する他の情報処理装置では、自身のサービスの担当範囲が決定した場合に、自身の担当範囲に応じたサービスを受信するための準備が行われる
(1)乃至(12)のいずれかに記載の情報処理装置。
(14)
前記スレーブプロキシが稼働する他の情報処理装置は、前記ネットワーク上に複数設置されている
(1)乃至(13)のいずれかに記載の情報処理装置。
(15)
放送波を受信する受信部をさらに備え、
前記処理部は、放送経由で配信される前記コンテンツのストリームを、前記ネットワークを介して前記クライアント装置に送信する
(1)乃至(14)のいずれかに記載の情報処理装置。
(16)
インターネット上のサーバと通信を行う通信部をさらに備え、
前記処理部は、通信経由で配信される前記コンテンツのストリームを、前記ネットワークを介して前記クライアント装置に送信する
(15)に記載の情報処理装置。
(17)
情報処理装置の情報処理方法において、
前記情報処理装置が、
複数のサービスごとに配信されるコンテンツのストリームを受信して、ネットワークに接続されたクライアント装置に送信するプロキシであって、スレーブプロキシに対するマスタプロキシとして機能し、各プロキシに対して、あらかじめ定められたポリシに応じたサービスの担当範囲を決定するステップを含む
情報処理方法。
(18)
マスタプロキシが稼働する第1の情報処理装置と、スレーブプロキシが稼働する1又は複数の第2の情報処理装置と、1又は複数のクライアント装置とが、ネットワークを介して接続された情報処理システムにおいて、
前記第1の情報処理装置は、
複数のサービスごとに配信されるコンテンツのストリームを受信して、前記ネットワークに接続された前記クライアント装置に送信するプロキシであって、前記スレーブプロキシに対する前記マスタプロキシとして機能し、各プロキシに対して、あらかじめ定められたポリシに応じたサービスの担当範囲を決定する処理部を備え、
前記第2の情報処理装置は、
複数のサービスごとに配信されるコンテンツのストリームを受信して、前記ネットワークに接続された前記クライアント装置に送信するプロキシであって、前記マスタプロキシに対する前記スレーブプロキシとして機能し、前記マスタプロキシにより決定された担当範囲に応じたサービスにより配信されるコンテンツのストリームを処理する処理部を備える
情報処理システム。
Claims (18)
- 複数のサービスごとに配信されるコンテンツのストリームを受信して、ネットワークに接続されたクライアント装置に送信するプロキシであって、スレーブプロキシに対するマスタプロキシとして機能し、各プロキシに対して、あらかじめ定められたポリシに応じたサービスの担当範囲を決定する処理部を備える
情報処理装置。 - 前記処理部は、各プロキシが稼働する情報処理装置にて受信可能なサービスを示すサービススキャン結果に基づいて、前記ポリシに応じたサービスの担当範囲を決定する
請求項1に記載の情報処理装置。 - 前記処理部は、各プロキシが稼働する情報処理装置の能力属性に基づいて、前記ポリシに応じたサービスの担当範囲を決定する
請求項2に記載の情報処理装置。 - 前記ポリシは、各プロキシに対し、ストリーム単位又はサービス単位で、サービスの担当範囲を割り当てる規則である
請求項2に記載の情報処理装置。 - 前記ポリシは、エンドユーザのコンテンツの視聴履歴に基づいて、サービスの担当範囲を割り当てる規則である
請求項2に記載の情報処理装置。 - 前記処理部は、アクセス頻度の高いサービスが、優先的に負荷分散されるように、サービスの担当範囲を決定する
請求項5に記載の情報処理装置。 - 前記処理部は、コンテンツのストリームのデータを同時に取得できるサービスが集約されるように、サービスの担当範囲を決定する
請求項5に記載の情報処理装置。 - 前記処理部は、アクセス頻度の高いストリームが、優先的に負荷分散されるように、サービスの担当範囲を決定する
請求項7に記載の情報処理装置。 - 前記処理部は、前記スレーブプロキシごとに、各スレーブプロキシの担当するサービスを示す担当範囲情報を通知する
請求項2に記載の情報処理装置。 - 前記処理部は、前記スレーブプロキシにより、前記担当範囲情報を取得するためのAPI(Application Programming Interface)が実行された場合に、前記担当範囲情報を、前記スレーブプロキシに通知する
請求項9に記載の情報処理装置。 - 前記処理部は、
各プロキシと、サービスの担当範囲とを対応付けたデータベースを生成し、
前記クライアント装置から、サービスのリクエストを受けた場合、前記データベースを参照して、当該サービスを担当するプロキシに対し、当該サービスのリクエストがリダイレクションされるようにする
請求項1に記載の情報処理装置。 - 前記ポリシは、エンドユーザにより設定される
請求項1に記載の情報処理装置。 - 前記マスタプロキシが稼働する情報処理装置と、前記スレーブプロキシが稼働する他の情報処理装置では、自身のサービスの担当範囲が決定した場合に、自身の担当範囲に応じたサービスを受信するための準備が行われる
請求項1に記載の情報処理装置。 - 前記スレーブプロキシが稼働する他の情報処理装置は、前記ネットワーク上に複数設置されている
請求項1に記載の情報処理装置。 - 放送波を受信する受信部をさらに備え、
前記処理部は、放送経由で配信される前記コンテンツのストリームを、前記ネットワークを介して前記クライアント装置に送信する
請求項1に記載の情報処理装置。 - インターネット上のサーバと通信を行う通信部をさらに備え、
前記処理部は、通信経由で配信される前記コンテンツのストリームを、前記ネットワークを介して前記クライアント装置に送信する
請求項15に記載の情報処理装置。 - 情報処理装置の情報処理方法において、
前記情報処理装置が、
複数のサービスごとに配信されるコンテンツのストリームを受信して、ネットワークに接続されたクライアント装置に送信するプロキシであって、スレーブプロキシに対するマスタプロキシとして機能し、各プロキシに対して、あらかじめ定められたポリシに応じたサービスの担当範囲を決定するステップを含む
情報処理方法。 - マスタプロキシが稼働する第1の情報処理装置と、スレーブプロキシが稼働する1又は複数の第2の情報処理装置と、1又は複数のクライアント装置とが、ネットワークを介して接続された情報処理システムにおいて、
前記第1の情報処理装置は、
複数のサービスごとに配信されるコンテンツのストリームを受信して、前記ネットワークに接続された前記クライアント装置に送信するプロキシであって、前記スレーブプロキシに対する前記マスタプロキシとして機能し、各プロキシに対して、あらかじめ定められたポリシに応じたサービスの担当範囲を決定する処理部を備え、
前記第2の情報処理装置は、
複数のサービスごとに配信されるコンテンツのストリームを受信して、前記ネットワークに接続された前記クライアント装置に送信するプロキシであって、前記マスタプロキシに対する前記スレーブプロキシとして機能し、前記マスタプロキシにより決定された担当範囲に応じたサービスにより配信されるコンテンツのストリームを処理する処理部を備える
情報処理システム。
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