WO2017010065A1

WO2017010065A1 - Information processing device, distribution method, and recording medium storing computer program

Info

Publication number: WO2017010065A1
Application number: PCT/JP2016/003225
Authority: WO
Inventors: 貴弘城島
Original assignee: 日本電気株式会社
Priority date: 2015-07-10
Filing date: 2016-07-07
Publication date: 2017-01-19

Abstract

The present invention provides an information processing device that safely distributes prefetch information to a terminal while reducing influence on communication of data that requires a high real-time property. The information processing device includes: a prefetch information determining unit that determines a stream used to transmit prefetch information to a terminal later on the basis of an information acquisition request received from the terminal, determines, as the prefetch information, content of a server that is identical to a destination of the information acquisition request or a source of a response on the basis of the information acquisition request or the response of the server, and sets a prefetch priority, which is a priority of transmission of the prefetch information to the terminal, lower than a predetermined priority of information that requires a high real-time property; a prefetch notification unit that transmits, to the terminal, a prefetch notification including a stream identifier representing the stream and a prefetch information identifier representing the prefetch information; a prefetch information acquisition unit that acquires prefetch information from the server; and a prefetch information transfer unit that transmits the acquired prefetch information to the terminal by the prefetch priority via the stream notified by the prefetch notification.

Description

Information processing apparatus, distribution method, and recording medium for recording computer program

The present invention relates to a distribution method in an information distribution system using an information processing apparatus (computer).

In recent years, information distribution systems that distribute information according to user requests from servers using a communication method based on HTTP (Hyper Text Transport Protocol) have been widely used. In the information distribution system, there is a problem that a response until information is provided for a user's acquisition request is slow. As a related technique for such a problem, a read-ahead technique is known in which information that a user will request for acquisition is provided in advance from a server to the user's terminal before the request is actually issued. .

Also, prefetched information (prefetch information or prefetch data) may be stored in the terminal until the user requests the data in the future. That is, it can be said that the prefetch information has a low degree of urgency (real-time property) compared to information required in response to a user operation. Accordingly, such communication packets of prefetch information with low real-time properties are required to prioritize communication packets that require real-time properties when the network is congested due to communication concentration.

As a technique related to the prefetching technique described above, for example, Patent Document 1 discloses an information processing system that transmits content according to the priority order of each content attribute. The server described in Patent Document 1 adds a priority for each content attribute to data described in a structured language, and transmits the data to a client. Based on the received data, the client creates a stream with a priority set according to the content to be acquired. Then, the server performs transmission including contents that are not used immediately in the client according to the priority order based on the priority set in the stream. The client can cache the unused content included in the content acquired by such priority order control until it is used later.

Patent Document 2 discloses an information providing system that acquires data from a server in advance by prefetching (prefetching). The information providing system described in Patent Document 2 can prefetch pages determined based on information extracted from an access log while rearranging the reading order according to the network load.

Patent Document 3 discloses a data prefetching system that selects a prefetch target according to the congestion state of a network. The data prefetching system described in Patent Document 3 can suppress the occurrence of prefetching traffic by reducing the prefetching data based on the importance of the reference source of the object when the network is congested.

Patent Document 4 discloses an information collection system for an image forming apparatus that reduces network congestion by a time zone for transmitting data that does not require real-time performance. The information collection system described in Patent Document 4 can perform communication in a time zone where the communication load of the public line is low, such as at midnight.

Also, in the communication of prefetched information, it is necessary to consider security so that the function of receiving content not requested by the terminal is not illegally used. For example, the terminal needs to be able to determine that the contents of an irrelevant server mixed with the prefetch data are illegal. Or, a mechanism that does not allow such mixing is necessary.

For example, in the server push function of the HTTP / 2.0 protocol, some communication rules are defined from the viewpoint of security. The server push function in HTTP / 2.0 means that when a server receives an HTTP request (information acquisition request) from a terminal, content (prefetched information) that has not been requested yet is transmitted through a stream newly created by the server. It is a method of transmitting in advance. In the server push function of HTTP / 2.0, the prefetched content may be sent before the original stream to which the HTTP request that is the prefetch source is sent is closed (while the original stream is maintained). It is prescribed. In addition, it is also stipulated that the URL of the prefetched content is limited to a URL whose source is the server that sent the content in response to the HTTP request.

JP 2014-021728 A JP 2004-280405 A JP 2002-373109 A Japanese Patent Application Laid-Open No. 09-200414 JP 2009-199148 A JP 2009-260653 A

However, the information processing system, the information providing system, and the data prefetching system described in Patent Documents 1 to 3 have a problem that the above-described unauthorized use is not considered.

In addition, since the information collection system described in Patent Document 4 controls communication according to time zones, there is a problem in that it cannot be controlled in accordance with the timing at which data with high real-time performance temporarily stops.

An object of the present invention is to provide an information processing apparatus and the like that safely distributes prefetch information to a terminal while reducing the influence on data communication with high real-time characteristics.

In order to achieve the above object, an information processing apparatus according to an aspect of the present invention includes the following configuration.

That is, an information processing device according to one embodiment of the present invention
Communication control means for controlling communication between a server that distributes content and a terminal that requests content from the server;
Communication transfer means for relaying communication packets in communication between the server and the terminal, and pre-read information that is pre-read content based on an information acquisition request for requesting the content received from the terminal. The information to be used is determined based on one of the information acquisition request that determines a stream to be used for transmission to the server, and receives the content as a response to the information acquisition request from the server. The destination of the acquisition request or the content of the same server as the transmission source of the information acquisition response is determined as the prefetch information, and the prefetch priority that is a priority when the prefetch information is transmitted to the terminal is determined in real time. Prefetch information determining means for determining as a lower priority than a predetermined priority for high information,
Prefetch notification means for transmitting to the terminal a prefetch notification including a stream identifier representing the stream and a prefetch information identifier representing the prefetch information;
Prefetch information acquisition means for acquiring the prefetch information from the server;
Prefetch information transfer means for transmitting the acquired prefetch information to the terminal with the prefetch priority via the stream corresponding to the stream identifier notified in the prefetch notification.

In order to achieve the above object, a terminal device according to one aspect of the present invention provides:
An information requesting means for transmitting an information acquisition request for requesting the content to the server to an information processing apparatus having the above-described configuration;
Receiving the prefetch notification from the information processing apparatus, further receiving prefetch information based on the prefetch notification, and including prefetch information accumulation means for storing prefetch accumulation information including at least the received prefetch information,
When the new content is needed and the new content is stored as the prefetch storage information, the information requesting unit does not transmit an information acquisition request, and transmits the new content from the prefetch storage information. The content is read and the new content is output.

In order to achieve the above object, a distribution method according to an aspect of the present invention is performed by an information processing device.
Based on the information acquisition request for requesting the content received from the terminal, determine the stream to be used when transmitting to the terminal prefetch information that is the content to be prefetched later,
Based on either the information acquisition request and the information acquisition response including the requested content received as a response to the information acquisition request from the server that distributes the content, or the information acquisition request destination or the information Perform prefetch information determination processing for determining the content of the same server as the transmission source of the acquisition response as the prefetch information,
A prefetch priority that is a priority when transmitting the prefetch information to the terminal is determined as a priority lower than a predetermined priority for information with high real-time characteristics,
A prefetch notification including a stream identifier representing the stream and a prefetch information identifier representing the prefetch information is transmitted to the terminal;
Obtaining the prefetch information from the server;
The acquired prefetch information is transmitted to the terminal with the prefetch priority via the stream corresponding to the stream identifier notified in the prefetch notification.

Further, the object is to provide an information processing device, a terminal device, and a distribution method having the above-described configurations by a computer, and a computer-readable storage medium storing the computer program. Is also achieved.

The present invention has an effect that the prefetch information can be safely delivered to the terminal while reducing the influence on data communication with high real-time property.

It is a block diagram which shows an example and structure of a communication environment in the information delivery system which concerns on the 1st Embodiment of this invention. It is a block diagram which shows an example of the communication environment in the information delivery system which concerns on the 2nd Embodiment of this invention. It is a sequence chart showing an example of operation | movement until the prefetch information 600 is accumulate | stored from the request | requirement of a content in 2nd Embodiment. It is a sequence chart showing an example of operation | movement until the prefetch information 600 and 601 are accumulate | stored from the request | requirement of a content in 2nd Embodiment. 10 is a flowchart illustrating an operation when the mobile terminal 200 receives a content request in the second embodiment. It is a flowchart which shows the operation | movement at the time of receiving the communication packet which the gateway apparatus 100 performs in 2nd Embodiment. 10 is a flowchart illustrating an operation when the mobile terminal 200 receives a communication packet in the second embodiment. It is a figure which shows an example of the information acquisition request 500 in 2nd Embodiment. It is a figure which shows an example of the prefetch notification 700 in 2nd Embodiment. It is a figure which illustrates the structure of the computer (information processing apparatus) applicable to each embodiment of this invention and the information delivery system which concerns on the modification.

Next, embodiments of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
FIG. 1 is a block diagram illustrating an example of a communication environment and a configuration in an information distribution system according to the first embodiment of the present invention. Referring to FIG. 1, the information distribution system according to the present embodiment includes an information processing device 1, a terminal device 10, and a server device 20.

The information processing apparatus 1, the terminal apparatus 10, and the server apparatus 20 can communicate with each other via a communication network (hereinafter simply referred to as a network) 1000 such as the Internet or a local area network (LAN). The server device 20 is a general content distribution server that can distribute information (content) in response to a request. There may be a plurality of server devices 20. Note that the network 1000 may not be a single communication network. For example, the information processing device 1 may be a relay device that is connected to the network 1000 to which the terminal 10 is connected and the other network 1000 to which the server device 20 is connected.

Information processing apparatus 1, terminal apparatus 10, and server apparatus 20 are general information processing apparatuses that operate under the control of a computer program (software program) that is executed using a CPU (Central Processing Unit: not shown). (Computer) may be used. Alternatively, each unit of the information processing device 1, the terminal device 10, and the server device 20 may be configured by a dedicated hardware device or a logic circuit. A hardware configuration example in which the information processing device 1, the terminal device 10, and the server device 20 are realized by a computer will be described later with reference to FIG.

The information processing apparatus 1 includes a communication control unit 2, a communication transfer unit 3, a prefetch information determination unit 4, a prefetch notification unit 5, a prefetch information acquisition unit 6, and a prefetch information transfer unit 7.

The communication control unit 2 can communicate with the terminal device 10 and the server device 20 via the network 1000. That is, each unit of the information processing device 1 performs communication with the terminal device 10 and the server device 20 via the communication control unit 2.

The communication transfer unit 3 can relay a communication packet in communication between the server device 20 that distributes the content and the terminal device 10 that requests the server device 20 for the content.

The prefetch information determination unit 4 receives an information acquisition request for requesting content from the terminal device 10. Based on the received information acquisition request, the prefetch information determination unit 4 determines a stream to be used when transmitting prefetch information, which is content to be prefetched later, to the terminal device 10. Further, the prefetch information determination unit 4 determines prefetch information based on either the information acquisition request or a response received from the server device 20 in response to the information acquisition request (hereinafter also referred to as “information acquisition response”). . At this time, the prefetch information determination unit 4 uses the content of the server device 20 that is the same as the destination of the information acquisition request or the transmission source of the response to the information acquisition request as the prefetch information.

Furthermore, the prefetch information determination unit 4 determines the priority (prefetch priority) when transmitting the determined prefetch information to the terminal device 10 as a priority lower than a predetermined priority for information with high real-time characteristics. To do. Information with a high real-time property is information with a clear immediate necessity, for example, an information acquisition request transmitted as a clear request from the terminal device 10 and a response to the information acquisition request. Moreover, you may include communication other than the content delivery in the terminal device 10, or communication by another terminal device as information with high real-time property.

The prefetch notification unit 5 transmits a prefetch notification including a stream identifier representing the stream determined by the prefetch information determination unit 4 and a prefetch information identifier representing the prefetch information to the terminal device 10.

The prefetch information acquisition unit 6 can acquire each prefetch information from the server device 20.

The prefetch information transfer unit 7 transmits the prefetch information acquired by the prefetch information acquisition unit 6 to the terminal device 10 with the prefetch priority via the stream corresponding to the stream identifier notified in the prefetch notification.

The terminal device 10 includes a communication control unit 11, an information request unit 12, a prefetch information storage unit 13, and a storage device 14. The storage device 14 can store the prefetch accumulation information 15.

The prefetch storage information 15 is information including at least prefetch information received from the information processing apparatus 1. The prefetch storage information 15 is generated by the prefetch information storage unit 13.

The communication control unit 11 can communicate with the information processing apparatus 1 via the network 1000. That is, each unit of the terminal device 10 performs communication with the information processing device 1 via the communication control unit 2.

The information request unit 12 can transmit an information acquisition request for requesting content from the server device 20 to the information processing device 1. In addition, the information request unit 12 can receive a response including content to the information acquisition request from the information processing apparatus 1. However, when new content is needed, if the content is stored as pre-read storage information 15, the information request unit 12 sends the content from the pre-read storage information 15 without transmitting an information acquisition request. read out. The information request unit 12 can output the received response or the content obtained from the prefetch storage information 15 to a user (not shown) who requested the content.

The prefetch information storage unit 13 receives a prefetch notification from the information processing apparatus 1. Furthermore, the prefetch information storage unit 13 receives prefetch information based on the received prefetch notification, and stores the prefetch storage information 15 including at least the received prefetch information.

The storage device 14 is realized by, for example, a semiconductor memory device or a disk device.

As a result of the above-described operation, the terminal device 10 can receive (push) prefetched information selected from the content of the server device 20 that is the destination of the information acquisition request. As a result, the terminal device 10 can use prefetching of content without worrying that the content of the server that is not clearly recognized by the user of the terminal device 10 is pushed. In addition, when the terminal device 10 transmits information acquisition requests to a plurality of server devices 20 in parallel, each response to each information acquisition request has higher priority than prefetched information obtained from any server device 20 Is transferred to the terminal device 10 at a time. Therefore, the terminal device 10 can receive information distribution by the plurality of server devices 20 without being affected by the transfer of the prefetch information.

Thus, according to the present embodiment, the prefetch information can be transmitted to the terminal device 10 with a priority lower than a predetermined priority for information with high real-time characteristics. That is, in the present embodiment, if the predetermined priority is a priority for data communication with high real-time property, the prefetch information can be distributed with a lower priority than data with high real-time property. The data having high real-time property corresponds to information requested in response to a user operation, such as content responding to an information acquisition request.

As described above, this embodiment has an effect that it is possible to provide an information processing apparatus that distributes prefetched information while reducing the influence on data communication with high real-time characteristics.

This is because the prefetch information determination unit 4 of the information processing apparatus 1 can set the priority of the prefetch information to a priority lower than a predetermined priority. This is because the prefetch information transfer unit 7 transmits the prefetch information to the terminal device 10 with a priority set lower than the predetermined priority.

Also, this embodiment has an effect that the prefetch information can be safely provided to the terminal device 10. That is, the terminal device 10 can receive only the prefetched information that has been notified in advance based on the prefetch notification. For example, the terminal device 10 can refuse to receive information other than the pre-read information notified in advance by the pre-read notification and the pre-read information via other than the pre-announced stream. The terminal device 10 can prefetch content in the range of the server device 20 whose prefetch information is recognized as a destination of an information acquisition request or a transmission source of a response.

This is because the prefetch information determination unit 4 of the information processing apparatus 1 selects the same content of the server device 20 as the destination of the information acquisition request or the transmission source of the response as the prefetch information.
This is because the prefetch notification unit 5 uses the prefetch notification to foresee the prefetch information to be transmitted later as prefetch information and the stream to which the prefetch information is transmitted.

In addition, this embodiment also has an effect that a prefetching technique can be provided to the server device 20 which is a general content distribution server.

The reason is that the information processing apparatus 1 determines prefetch information, notifies prefetch information, acquires and transfers prefetch information without implementing any special function in the server device 20.

In addition, the following can be considered as a modification of this embodiment.

For example, the prefetch information determined by the prefetch information determination unit 4 may be plural. In this case, the prefetch information determination unit 4 may determine the priority for transmitting the prefetch information for each prefetch information. The prefetch notification unit 5 may send the prefetch notification as an individual notification for each prefetch information identifier. Alternatively, the prefetch notification unit 5 may send the prefetch notification as one notification including each prefetch information identifier.

<Second Embodiment>
Next, a second embodiment based on the above-described first embodiment will be described. In the following, the characteristic part according to the second embodiment will be mainly described, and the components of the second embodiment having the same configuration as the first embodiment are attached in the first embodiment. The same reference numerals as those of the reference numerals are attached, and the detailed description of the constituent elements is omitted.

First, the configuration of the present embodiment will be described below with reference to FIG. FIG. 2 is a configuration diagram illustrating an example of a communication environment in the information distribution system according to the second embodiment of the present invention. Referring to FIG. 2, the present embodiment includes a gateway device (information processing device) 100, a mobile terminal (terminal device) 200, a server device 300, and a base station 400.

In the present embodiment, as an embodiment, a case where the present invention is applied to a mobile communication network will be described. In this embodiment, the base station 400 connects between the mobile terminal 200 capable of wireless communication and the gateway device 100. The information distribution system according to the present embodiment can include a plurality of mobile terminals 200 and server devices 300, respectively. Hereinafter, the configuration and operation of the present embodiment will be described by taking a pair of mobile terminal 200 and server device 300 operating in such an information distribution system as an example.

In this embodiment, HTTP / 2.0 is adopted as an example of a communication protocol for requesting and distributing content. The location (destination) of the content is represented by a URL (Uniform Resource Locator) including information regarding the host name of the server device 300 having the content and the content path. That is, the prefetch information in this embodiment is identified by the URL. In the following description, “prefetch information identifier” is referred to as “prefetch URL”.

The gateway device 100, the server device 300, and the base station 400 can communicate with each other via a network 1000 such as the Internet or a local area LAN. Note that the server device 300 and the base station 400 may not be able to communicate with each other. The mobile terminal (terminal device) 200 and the base station 400 can communicate by wireless communication. The mobile terminal 200 can communicate with the server device 300 via the base station 400 and the gateway 100. Gateway device 100 and base station 400 may be implemented in the same device.

A plurality of base stations 400 may be arranged according to the reach of radio waves. When mobile terminal 200 can receive radio waves from a plurality of base stations 400, mobile terminal 200 is automatically connected to base station 400 having good radio wave quality (radio wave quality). The gateway device 100 can communicate with each base station 400 via the network 1000.

The gateway device 100, the mobile terminal (terminal device) 200, the server device 300, and the base station 400 are generally operated by control of a computer program (software program) executed using a CPU (not shown). An information processing apparatus (computer) may be used. Alternatively, each unit of the gateway device 100, the mobile terminal (terminal device) 200, the server device 300, and the base station 400 may be configured by a dedicated hardware device or a logic circuit. A hardware configuration example in which the gateway device 100, the mobile terminal (terminal device) 200, the server device 300, and the base station 400 are realized by a computer will be described later with reference to FIG.

The server device 300 in the present embodiment corresponds to the server device 20 in the first embodiment. The server device 300 includes contents (not shown) such as images, texts, and moving images. The server device 300 returns the content requested by the application 201 of the mobile terminal 200 in a response (also referred to as “information acquisition response”) in accordance with the HTTP protocol. The description of the application 201 of the mobile terminal 200 will be described later.

The base station 400 can transmit the communication packet received from the gateway device 100 as wireless communication to the mobile terminal 200 according to the designated priority. Further, the base station 400 can transmit information received from the mobile terminal 200 via wireless communication to the gateway apparatus 100 as a communication packet.

The gateway apparatus 100 in the present embodiment is based on the information processing apparatus 1 in the first embodiment. The gateway device 100 includes a communication control unit 2, a communication transfer unit 3, a prefetch information determination unit 4, a prefetch notification unit 5, a prefetch information acquisition unit 6, a prefetch information transfer unit 7, and a storage device 103. The storage device 103 includes setting information 104 and history information 105. The communication control unit 2, the communication transfer unit 3, the prefetch information determination unit 4, the prefetch notification unit 5, the prefetch information acquisition unit 6, and the prefetch information transfer unit 7 are each based on the first embodiment.

Below, it demonstrates centering on a different point from 1st Embodiment in the communication control part 2, the communication transfer part 3, the prefetch information determination part 4, the prefetch notification part 5, the prefetch information acquisition part 6, and the prefetch information transfer part 7. To do.

The communication control unit 2, the communication transfer unit 3, and the prefetch information transfer unit 7 in the present embodiment can perform control based on the communication protocol and control necessary for mobile communication. For example, the communication control unit 2, the communication transfer unit 3, and the prefetch information transfer unit 7 can determine the transfer destination server device 300 and the mobile terminal 200 by analyzing the URL by communication protocol control including HTTP. Further, the communication control unit 2 manages information on the base station 400 to which the mobile terminal 200 is connected. The communication control unit 2 can transfer a communication packet to an appropriate base station 400 when communicating with the mobile terminal 200 based on the managed information. Since a general mobile communication method can be adopted as a control method in communication between the gateway apparatus 100 and the mobile terminal 200 via the base station 400, detailed description is omitted.

The prefetch information determination unit 4 in this embodiment is different from the first embodiment in that it includes a request prefetch information determination unit 101 and a response prefetch information determination unit 102 as an example of a prefetch information determination method. . The on-request prefetch information determination unit 101 can also be said to be a “prefetch information determination unit 101 for an information acquisition request”. The response prefetch information determination unit 102 can also be said to be a “prefetch information determination unit 102 for the acquired information (content)”. In other words, in the present embodiment, the prefetch information determination unit 4 includes a plurality of prefetch information determination methods for determining prefetch information using different methods. And the prefetch information determination part 4 can determine prefetch priority according to the method which determined each prefetch information. Note that the prefetch information determination unit 4 may include either the request prefetch information determination unit 101 or the response prefetch information determination unit 102 as a part of a plurality of prefetch information determination methods. The prefetch information determination unit 4 may include a prefetch information determination method other than the request prefetch information determination unit 101 and the response prefetch information determination unit 102.

The request prefetch information determination unit 101 executes each process based on the prefetch information determination unit 4 in the first embodiment in response to an information acquisition request received from the mobile terminal 200. In this embodiment, when determining the prefetch URL, the prefetch information determination unit 101 at the time of request determines prefetch information (prefetch URL) based on at least the setting information 104 or the history information 105 with respect to the URL included in the information acquisition request. Can be determined. Further, when determining the priority (prefetch priority) for the prefetch URL, the request prefetch information determination unit 101 uses the method of determining the prefetch URL (whether the prefetch URL is determined based on the setting information 104 or the history information 105). The priority determined accordingly is determined.

The setting information 104 is information in which a URL (prefetch URL) that is likely to be acquired later is described for a specific URL. A plurality of setting information 104 may be described for one URL. It is assumed that the prefetch URL described in the setting information 104 is a URL for other contents of the same server device 300 as the corresponding URL. In the present embodiment, as an example, the setting information 104 is stored in the storage device 103 in advance.

The history information 105 is information including a history in which URLs of contents acquired by the mobile terminal 200 from the server device 300 in the past are recorded. The history information 105 may be updated each time a communication packet related to the mobile terminal 200 is transferred by the communication transfer unit 3 or a function unit (not shown).

The response prefetch information determination unit 102 executes each process based on the prefetch information determination unit 4 in the first embodiment in response to a response (information request response) including content received from the server device 300. In this embodiment, when the prefetch URL is determined, the response prefetch information determination unit 102 determines the content of the same server device 300 as the response transmission source as the prefetch URL based on the content included in the response. Further, when determining the priority for the prefetch URL, the response prefetch information determination unit 102 determines the priority determined according to the method for determining the prefetch URL (that is, the method for determining based on the response).

Since the structures and functions of the request prefetch information determination unit 101 and the response prefetch information determination unit 102 other than the points described above are the same as those of the prefetch information determination unit 4 in the first embodiment, a detailed description will be omitted. Omitted.

In the present embodiment, as an example, priority control in the transfer of communication packets is performed for communication performed from the gateway device 100 to the mobile terminal 200.
The communication control unit 2 of the present embodiment can transmit a communication packet with a priority according to a protocol negotiated with the base station 400 to the base station 400.

For example, the prefetch information transfer unit 7 requests the communication control unit 2 to transmit to the base station 400 by specifying the prefetch priority when transmitting the prefetch information. And the communication control part 2 may add the information which designates the priority corresponding to a prefetch priority according to the protocol negotiated with the base station 400 to the communication packet to transmit. The base station 400 that has received such a communication packet performs radio communication scheduling for the mobile terminal 200 based on the designated prefetch priority when transmitting to the mobile terminal 200.

The communication control unit 2 transmits a communication packet designating a priority to the base station 400 as follows. For example, when there are a plurality of prioritized bearers set between the mobile terminal 200 and the gateway device 100, the communication control unit 2 responds to the priority of the bearer so that the priority is the same as the priority of the communication packet. The bearer that transmits the communication packet may be determined. Alternatively, in the communication between the base station 400 and the gateway device 100, when a protocol capable of setting the priority is used, the communication control unit 2 attaches a priority according to the protocol to the communication packet, and It may be transmitted to the station 400. Since the base station 400 can transmit a communication packet to the mobile terminal 200 based on the priority, a general priority control method can be adopted, and thus detailed description thereof is omitted.

Note that priority control in the transfer of communication packets is not limited to the method of this embodiment.
For example, the communication can be similarly performed from the gateway device 100 to other devices such as the server device 300.

Except for the points described above, the structures and functions of the communication control unit 2, the communication transfer unit 3, the prefetch information determination unit 4, the prefetch notification unit 5, the prefetch information acquisition unit 6, and the prefetch information transfer unit 7 are the same as those in the first embodiment. Since these are the same, the detailed description which overlaps is omitted.

The mobile terminal 200 in the present embodiment is based on the terminal device 10 in the first embodiment. The mobile terminal 200 includes an application 201, a communication control unit 11, an information request unit 12, a prefetch information storage unit 13, and a storage device 14. The storage device 14 can store the prefetch accumulation information 15. The communication control unit 11, the information request unit 12, the prefetch information storage unit 13, the storage device 14, and the prefetch storage information 15 in this embodiment are based on the first embodiment. The mobile terminal 200 according to the present embodiment is different from the first embodiment in that the mobile terminal 200 includes an application 201.

Application 201 is a terminal application that provides an arbitrary service to a user. The application 201 can request content from a server application (not shown) operating on the server device 300 in response to a user request. The application 201 outputs a content request to the server device 300 to the information request unit 12. In other words, the information request unit 12 in this embodiment starts the operation upon receiving a content request from the application 201. Then, the information request unit 12 outputs the acquired content to the application 201.

Since the structures and functions of the communication control unit 11, the information request unit 12, the prefetch information storage unit 13, the storage device 14, and the prefetch storage information 15 other than those described above are the same as those in the first embodiment, overlapping details The detailed explanation is omitted.

Next, the operation of the present embodiment having the above-described configuration will be described in detail.

First, the communication between the mobile terminal 200, the gateway device 100, and the server device 300 will be described below on the assumption that the server push function is used in the HTTP / 2.0 protocol. The server push function in HTTP / 2.0 means that when a server receives an HTTP request (information acquisition request) from a terminal, content (prefetched information) that has not been requested yet is transmitted through a stream newly created by the server. It is a method of transmitting in advance. Note that the HTTP / 2.0 server push function does not include a method of selecting prefetched content. The terminal corresponding to HTTP / 2.0 stores the content pre-read from the server in association with the URL, and then reads the stored content instead of the terminal issuing an HTTP request for the URL. Is stipulated.

Also, the HTTP / 2.0 server push function has the communication rules as described above in the background section from the viewpoint of security.

The above is the HTTP / 2.0 server push function assumed in the present embodiment. It is assumed that the mobile terminal 200, the gateway device 100, and the server device 300 according to the present embodiment can perform communication in accordance with the rules of the HTTP / 2.0 server push function.

However, the present embodiment is not limited to the HTTP / 2.0 protocol as long as it is a protocol that implements a data prefetch (content prefetching) function from the server device 300.

Also, as described above, the priority in transferring the communication packet is determined for each prefetch URL according to the method for determining the prefetch URL. Further, as in the first embodiment, the priority of the prefetched content is determined so as to be lower than information with high real-time property (that is, response). In the following description, as an example, the priority of the response to the information acquisition request (“predetermined priority” in the first embodiment) is “0”, which is a value indicating the highest. For the URL included in the information acquisition request, the priority of the prefetch URL determined based on the setting information 104 is “1”, which is the next highest. The priority of the prefetch URL determined based on the content included in the response is “2”. The priority of the prefetch URL determined based on the history information 105 with respect to the URL included in the information acquisition request is “3”. In the present embodiment, as an example, a smaller priority value indicates that transmission is performed with higher priority (higher priority).

Further, it is assumed that the base station 400 has already managed the mobile terminal 200 at the start of the following operation. That is, it is assumed that a virtual communication connection called a bearer is formed between the mobile terminal 200, the base station 400, and the gateway device 100. In addition, when the mobile terminal 200, the base station 400, the gateway device 100, and the server device 300 communicate with each other, it is assumed that an appropriate connection is established by a mechanism according to the TCP / IP rules. Also, it is assumed that the mobile terminal 200 does not store any prefetch storage information 15 at the start of the following operation.

FIG. 3 is a sequence chart showing an example of an operation from a request for content to accumulation of prefetch information 600 in the second embodiment. FIG. 4 is a sequence chart showing an example of an operation from content request to prefetch information 600 and 601 accumulation in the second embodiment. Referring to FIG. 3, first, the application 201 of the mobile terminal 200 requests content in the server device 300 from the information requesting unit 12, for example, by a user operation. The information request unit 12 receives a content request from the application 201 (step A10). The requested content is represented by a URL.

The detailed operation when the mobile terminal 200 receives a request for content will be described with reference to FIG. 5 in addition to FIG. FIG. 5 is a flowchart illustrating an operation when the mobile terminal 200 receives a content request in the second embodiment. Referring to FIG. 5, when information request unit 12 receives a request for content (step A100 and step A10 in FIG. 3), it determines whether the requested content is stored (step A101). That is, the information requesting unit 12 confirms whether or not the content corresponding to the requested content URL is stored in the storage device 14 as the pre-read accumulated information 15.

At this time, since the requested content does not exist in the prefetch storage information 15 (NO in step A101), the information request unit 12 sends an information acquisition request 500 including the URL of the content of the server device 300 to the gateway device 100. Transmit (Step A102 and Step A11 in FIG. 3).

Specifically, the information request unit 12 generates a new stream using the HTTP / 2.0 protocol. Then, the information request unit 12 transmits an information acquisition request 500 specifying the new stream to the base station 400 via the communication control unit 11. The communication control unit 11 converts communication contents into radio waves and transmits them to the base station 400. As a radio wave conversion method, for example, a mobile communication standard such as W-CDMA (Wideband-Code Division Multiple Access) or LTE (Long Term Evolution) can be used. The base station 400 converts the received radio wave into a communication packet and transmits it to the gateway device 100. Details of such wireless communication via the base station 400 will be omitted in the following description.

FIG. 8 is a diagram illustrating an example of the information acquisition request 500 according to the second embodiment. Referring to FIG. 8, the line “Stream ID: 1” indicates that the identifier of the stream to which the information acquisition request 500 is transmitted is “1”. Also, the line “: authority sv300” represents a server that is a request destination for content acquisition. The line beginning with “: path” represents the path of the content in the server that is the request destination. A line beginning with “: scheme” represents a protocol to be used when content is acquired. That is, FIG. 8 shows that the URL of the content to be acquired is “http: //sv300/index.html”. “Sv300” is a temporary server name representing the server apparatus 300. Actually, “sv300” may be represented by a host name used when performing a name resolution search for a DNS (Domain Name Server) including a domain name. The description of “: authority”, “: path”, and “: scheme” in FIG. 8 is an example. These descriptions may be other character strings or numerical values representing the same contents. Further, these descriptions may be expressed as one character string or a number sequence including a plurality of elements.

Then, the information request unit 12 waits for reception of a communication packet (step A103).

Referring to FIG. 3, the gateway device 100 receives the information acquisition request 500 and transfers the received information acquisition request 500 to the server device 300 (step B10).
The detailed operation when the gateway apparatus 100 receives the information acquisition request 500 will be described with reference to FIG. 6 in addition to FIG. FIG. 6 is a flowchart showing an operation when the gateway apparatus 100 receives a communication packet in the second embodiment. Referring to FIG. 6, in gateway apparatus 100, communication control unit 2 receives a communication packet (step B201).

When the received communication packet is the information acquisition request 500 (YES in Step B202), the communication control unit 2 passes the information acquisition request 500 to the communication transfer unit 3. The communication transfer unit 3 determines the server device 300 that is the transfer destination based on the URL that represents the request target (request destination) included in the communication packet (information acquisition request 500), and for the determined server device 300, The information acquisition request 500 is transferred (step B210 and step B10 in FIG. 3). Thereafter, the communication transfer unit 3 determines the transfer destination in the same manner when transferring the communication packet, and then performs transfer.

Furthermore, the communication transfer unit 3 passes the information acquisition request 500 to the prefetch information determination unit 101 when requested by the prefetch information determination unit 4. The request prefetch information determination unit 101 extracts a request destination URL indicating a request destination and a stream identifier from the information acquisition request 500 (step B211). Hereinafter, for the purpose of specifying the request destination URL extracted from the information acquisition request 500 transmitted at the beginning of a new stream and the identifier of the stream, they are also referred to as “original URL” and “original stream”. For example, in the example of the information acquisition request 500 illustrated in FIG. 8, the original stream identifier is “1”. Similarly, in the example illustrated in FIG. 8, the original URL is “http: //sv300/index.html”.

Next, the request prefetch information determination unit 101 extracts, from the setting information 104, a URL for the server device 300 that is the same (equivalent) to the request destination URL (step B212). In other words, the request prefetch information determination unit 101 extracts a URL representing another content in the same server device 300 as the original URL.

If the URL cannot be extracted from the setting information 104 in step S212 (NO in step B213), the request prefetch information determination unit 101 determines from the history information 105 the URL for the server device 300 that is the same (equivalent) to the request destination URL. Is extracted (step B214). For example, the prefetch information determining unit 101 on request may extract URLs representing other content acquired from the same server device 300 after acquiring the content represented by the original URL in the past.

In step B212 and B214, the URL extracted by the request prefetch information determination unit 101 is a prefetch URL. There may be a plurality of prefetch URLs. Note that the prefetch information determining unit 101 at the time of request may recognize that the URL is for the same server device 300 even when it is represented by a different name different from the server name of the original URL.

If the URL could not be extracted even in step B214 (NO in step B215), the request prefetch information determination unit 101 regards that there is no prefetchable URL and ends the process. That is, the gateway device 100 ends the process for the information acquisition request 500.

When the prefetch URL can be extracted in step B212 or B214 (YES in step B213 or B215), the request prefetch information determination unit 101 determines the priority for each prefetch URL (step B216). The request prefetch information determination unit 101 determines the priority for any prefetch URL so that the priority is lower than the response 800 to the information acquisition request 700. In the present embodiment, the request-time prefetch information determination unit 101 determines the priority determined according to the method for determining the prefetch URL described above. Specifically, the request prefetch information determination unit 101 determines the priority “1” for the prefetch URL determined based on the setting information 104 in step B212. Further, the prefetch information determination unit 101 on request determines the priority “3” for the prefetch URL determined based on the history information 105 in step B214.

Also, the prefetch information determining unit 101 at the time of request determines a stream to be used when transmitting prefetch information, which is content prefetched later, to the mobile terminal 200 with respect to the prefetch URL. The request prefetch information determination unit 101 may determine a separate stream for each prefetch URL. Alternatively, the prefetch information determining unit 101 on request may assign the same stream to each prefetch URL.

Steps B211 to B216 in FIG. 6 correspond to step B11 in FIG. Also, the content represented by the prefetch URL extracted by the prefetch information determining unit 101 at request corresponds to the prefetch information 600 in FIG.

Next, the prefetch notification unit 5 transmits to the mobile terminal 200 a prefetch notification 700 including a stream identifier representing the stream determined by the request prefetch information determination unit 101 and a prefetch URL representing the content to be prefetched ( Step B217 and Step B12 of FIG. 3). In this embodiment, as an example, the prefetch notification unit 5 transmits a prefetch notification 700 for each prefetch URL via the base station 400 using the original stream.

At this time, the prefetch notification unit 5 transmits the prefetch notification 700 as a predetermined priority. For example, the prefetch notification unit 5 may set the priority of the prefetch notification 700 to “0” in the same manner as information having real-time characteristics. Alternatively, the prefetch notification unit 5 may set the priority of the prefetch notification 700 to “1” which is the highest as prefetch information. Specifically, the communication control unit 2 requested to transmit to the prefetch notification unit 5 adds information specifying the priority “0” to the communication packet including the prefetch notification 700. Then, the communication control unit 2 transmits the communication packet with the priority specified in this way to the base station 400. In the following description, description of the operation performed by the communication control unit 2 when each unit of the gateway device 100 designates the priority and transmits it to the base station 400 is omitted.

FIG. 9 is a diagram illustrating an example of the prefetch notification 700 according to the second embodiment. Referring to FIG. 9, a line “Promised Stream ID: 2” represents that the identifier of the stream to which the content (prefetch information) represented by the prefetch URL is transmitted is “2”. Further, the meaning of each line starting with “: authority”, “path”, and “: scheme” is the same as that of the information acquisition request 500 in FIG. Therefore, FIG. 9 shows that the URL of the prefetched content is “http: //sv300/style.css”. The value of “: authority” specified here is the same server as the server indicated by the value of the request destination indicated by “: authority” of the information acquisition request 500 received earlier. The descriptions of “: authority”, “: path”, and “: scheme” in FIG. 9 are examples. These descriptions may be other character strings or numerical values representing the same contents. Further, these descriptions may be expressed as one character string or a number sequence including a plurality of elements.

Next, the prefetch information acquisition unit 6 transmits a request for the content (prefetch information 600) indicated by each prefetch URL to the server device 300 (step B218 and step B13 in FIG. 3). Specifically, the prefetch information acquisition unit 6 transmits an information acquisition request for each prefetch URL to the server device 300. The data format of the “request for prefetch information 600” is the same as the information acquisition request 500 sent from the mobile terminal 200 to the server device 300. However, here, for the purpose of distinction from the “information acquisition request 500” sent from the mobile terminal 200, the information acquisition request in acquiring the prefetched content is described as “request for prefetch information 600”.

At this point, since the response 800 to the information acquisition request 500 has not yet been processed (NO in step B219), the communication control unit 2 maintains the original stream even after the transmission in step B218 is completed.

The above is the detailed operation when the gateway apparatus 100 receives the information acquisition request 500.

Referring back to FIG. The mobile terminal 200 receives the prefetch notification 700 from the gateway device 100 (step A12). Detailed operations performed when the mobile terminal 200 receives the prefetch notification 700 will be described with reference to FIG. 7 in addition to FIG. FIG. 7 is a flowchart showing an operation when the mobile terminal 200 receives a communication packet in the second embodiment.

Referring to FIG. 7, the communication control unit 11 receives a communication packet (step A300).
When the received communication packet is the prefetch notification 700 (NO in step A301 and YES in step A302), the communication control unit 11 passes the received prefetch notification 700 to the prefetch information storage unit 13. The prefetch information storage unit 13 stores the contents of the received prefetch notification 700 in, for example, the storage device 14.

The above is the detailed operation when the mobile terminal 200 receives the prefetch notification 700.

In addition, the server device 300 receives the information acquisition request 500 transmitted from the gateway device 100 in step B10 (step C10). Similarly, the server device 300 receives the request for the prefetch information 600 transmitted from the gateway device 100 in step B13 (step C11). The server apparatus 300 that has received them first transmits a response 800 to the information acquisition request 500 to the gateway apparatus 100 (step C12). In addition, the order of the response of the server apparatus 300 and the reception of the next (new) information acquisition request is an example, including the subsequent description. For example, the server apparatus 300 may change the order of communication such as receiving a request for the prefetch information 600 (step C11) after transmitting the response 800 (step C12).

The gateway device 100 receives the response 800, and transfers the received response 800 to the mobile terminal 200 (step B14). The detailed operation of the gateway device 100 when receiving the response 800 will be described with reference to FIG. Referring to FIG. 6, the communication control unit 2 receives a communication packet (step B201). When the received communication packet is a response 800 to the information acquisition request 500 (NO in steps B202 and B203), the communication control unit 2 passes the received response 800 to the communication transfer unit 3. The communication transfer unit 3 transfers the received response 800 to the mobile terminal 200 with the highest priority as real-time information (step B205). Specifically, the communication transfer unit 3 designates the priority “0” and transmits the response 800 via the base station 400. The operation in which the base station 400 that relays the transfer performs the priority control is as described above in the description of the configuration.

FIG. 6 is a diagram for explaining the operation when the communication control unit 2 receives the information acquisition request 500, the prefetch information 600 and 601, and the response 800. When the communication control unit 2 receives another communication packet that is not related to the operation of the present embodiment, the communication control unit 2 may process the predetermined operation not described in FIG.

Further, the communication transfer unit 3 passes the response 800 to the response prefetch information determination unit 102 of the prefetch information determination unit 4. The response prefetch information determination unit 102 extracts the URL of the server device 300 that is the same as the response transmission source from the content included in the response 800 (step B206). Here, the URL extracted by the response prefetch information determination unit 102 is the prefetch URL determined based on the response 800. There may be a plurality of prefetch URLs. The response prefetch information determination unit 102 may recognize that the URL is for the same server device 300 even when the prefetch information determination unit 102 is represented by a different name.

If the URL cannot be extracted in step B206 (NO in step B215), the response prefetch information determination unit 102 determines that there is no prefetchable URL, and ends the process. That is, the gateway device 100 ends the process for the response 800.

If the URL can be extracted in step B206 (YES in step B215), the response prefetch information determination unit 102 determines the priority for each prefetch URL (step B216). The response prefetch information determination unit 102 also determines the priority for any prefetch URL so that the priority is lower than the response 800 for the information acquisition request 700. Specifically, the response prefetch information determination unit 102 determines the priority “2” for the prefetch URL (prefetch information 601) determined based on the content included in the response.

Steps B206 to B216 in FIG. 6 correspond to step B16 in FIG. Further, the content represented by the prefetch URL extracted by the response prefetch information determination unit 102 corresponds to the prefetch information 601 in FIG.

Next, the prefetch notification unit 5 transmits a prefetch notification 701 corresponding to the prefetch URL determined based on the response 800 to the mobile terminal 200 (step B217 and step B17 in FIG. 4). And the prefetch information acquisition part 6 requests | requires the prefetch information 601 (step B218 and step B18 of FIG. 4). Since the operations of the prefetch notification unit 5 and the prefetch information acquisition unit 6 are the same as those described above, a duplicate description is omitted.

The response 800 may be received by being divided into a plurality of communication packets. When processing (steps B201 to B218) for all communication packets included in the response 800 is performed (YES in step B219), the communication control unit 2 ends the original stream (step B230).

The above is the detailed operation when the gateway apparatus 100 receives the response 800.

Referring back to FIG. The mobile terminal 200 receives the response 800 transferred from the gateway device 100 (step A13). Detailed operations performed when the mobile terminal 200 receives the response 800 will be described with reference to FIG. Referring to FIG. 7, the communication control unit 11 receives a communication packet (step A300). If the communication packet is a response 800 (YES in step A301), the communication control unit 11 passes the received response 800 to the information request unit 12. The information request unit 12 outputs the content of the response 800 to the application 201 as a response to the content request received at step A10 in FIG. 3 (step A320 and step A14 in FIG. 3). For example, the application 201 may present the content obtained by the response 800 to the user.

The above is the detailed operation when the mobile terminal 200 receives the response 800.

This will be described with reference to FIG. Further, the mobile terminal 200 receives the prefetch notification 701 for the prefetch information 601 determined based on the response 800 (step A15). The operation of the mobile terminal 200 at this time is the same as that described above.

Meanwhile, the server device 300 receives a request for the prefetch information 601 from the gateway device 100 (step C13). The server device 300 transmits the prefetch information 600 in response to the request for the prefetch information 600 received in step C11 that has not yet been sent back (step C14). Specifically, the server device 300 transmits a response including the content (prefetch information 600) corresponding to the requested prefetch URL to the gateway device 100. The data format of this response is the same as the response 800 to the information acquisition request 500. However, here, the transmission of the response including the prefetch information 600 is described as “transmission of the prefetch information 600” for the purpose of distinguishing from the “response 800” which is information with high real-time characteristics.

Thereafter, the server device 300 similarly transmits the prefetch information 601 in response to the request for the prefetch information 601 received in step C13 (step C15).

The gateway device 100 receives the prefetch information 600 sent as a response, and transfers the received prefetch information 600 to the mobile terminal 200 (step B19). The detailed operation of the gateway device 100 when receiving the prefetch information 600 will be described with reference to FIG. Referring to FIG. 6, the communication control unit 2 receives a communication packet (step B201). When the received communication packet is distribution of the prefetch information 600 (NO in step B202 and YES in step B203), the communication control unit 2 passes the received prefetch information 600 to the prefetch information transfer unit 7. The prefetch information transfer unit 7 transfers the prefetch information 600 to the mobile terminal 200 according to the priority for each prefetch URL via the stream notified by the prefetch notification 700 (step B220 and step B19 in FIG. 4).

Specifically, the communication control unit 2 requested to transmit to the prefetch information transfer unit 7 adds information specifying the priority “1” or “3” to the communication packet including the prefetch information 600. Then, the communication control unit 2 transmits to the base station 400. In the following description, description of the operation via the communication control unit 2 is omitted.

Similarly, the gateway device 100 receives the prefetch information 601 and transfers the received prefetch information 601 to the mobile terminal 200 (step B20 in FIG. 4).

Note that the communication control unit 2 maintains the original stream even when the transmission of the prefetch information 600 and the prefetch information 601 described above is completed.

Referring back to FIG. First, the mobile terminal 200 receives the prefetch information 600 (step A16). A detailed operation performed when the mobile terminal 200 receives the prefetch information 600 will be described with reference to FIG. Referring to FIG. 7, the communication control unit 11 receives a communication packet (step A300). When the communication packet is the prefetch information 600 sent in the stream notified in the prefetch notification 700 or 701 (NO in steps A301 and 302 and YES in step A303), the communication control unit 11 receives the prefetch information received. The information 600 is passed to the prefetch information storage unit 13. The prefetch information accumulation unit 13 associates the content of the notification packet (prefetch information 600) with the prefetch URL and accumulates it as the prefetch accumulation information 15 (step A304 and step A17 in FIG. 4).

Similarly, the mobile terminal 200 receives the prefetch information 601 (step A18), and accumulates the received prefetch information 601 as the prefetch storage information 15 (step A19).

The above is an example of an operation executed based on a single content request.

Next, the operation when the application 201 requests the content (prefetch information 600 or 601) stored in the prefetch storage information 15 after the operations shown in FIGS. 3 and 4 are completed will be described. Referring to FIG. 5, for example, when receiving a request for prefetch information 600 (step A100), the information request unit 12 determines whether the requested content is accumulated (step A101). Since the prefetch information 600 is included in the prefetch storage information 15 (YES in step A101), the information request unit 12 outputs the prefetch information 600 read from the prefetch storage information 15 to the application 201 (step A110). . In this way, the information request unit 12 can quickly respond to a request for content without performing communication.

In this embodiment, in this way, the communication control unit 2 of the gateway device 100 maintains the stream (original stream) that has received the information acquisition request 500 until the prefetch notifications 700 and 701 and the response 800 are transmitted. Then, after transmitting all the communication packets included in the prefetch notifications 700 and 701 and the response 800 to the mobile terminal 200, the communication control unit 2 ends the original stream (step B230). That is, in the present embodiment, the original stream maintenance period is from when the information acquisition request 500 is received until the response 800 to the information acquisition request 500 and the (last) prefetch notification 701 are completely transmitted to the mobile terminal 200. Between. There is an effect that the mobile terminal 200 can ensure the validity (not illegal) of the prefetch notifications 700 and 701 by maintaining the original stream.

The communication control unit 2 can end the original stream at any timing after transmitting the prefetch notification 701 (step B17). In the present embodiment, the communication control unit 2 may transfer the prefetch information 600 or 601 to the mobile terminal 200 regardless of the maintenance period of the original stream.

In the present embodiment, as an example, the mobile terminal 200 creates a new stream when transmitting a new information acquisition request. Therefore, in the present embodiment, the communication control unit 2 of the gateway device 100 does not receive an information acquisition request other than the initial information acquisition request 500 via the original stream.

Also, the original stream may be terminated at a timing other than Step B230, for example, when terminated from the mobile terminal 200 (base station 400).

As described above, in addition to the same effects as those of the first embodiment described above, this embodiment further includes a general server device and a general terminal device corresponding to HTTP / 2.0. There is also an effect that can be used.

The reason is that the communication method for acquiring and transferring the prefetch information performed by the gateway apparatus 100 in the present embodiment can satisfy the provisions of HTTP / 2.0.

For example, the gateway device 100 may further acquire prefetch information for the prefetch information 600 and 601 obtained from the server device 300. For example, after the prefetch information 600 is transferred in step B220 of FIG. 6, the response prefetch information determination unit 102, the prefetch notification unit 5, and the prefetch information acquisition unit 6 further respond to the prefetch information 600 in response 800. A process similar to the process (steps B206 and B215 to B218) may be performed. In this way, since prefetching is performed in advance, it can be expected that the prefetch storage information 15 is more likely to meet the content request.

Further, the communication control unit 2 of the gateway device 100 may convert the communication protocol in communication with the server device 300. For example, the communication control unit 2 may transmit a communication packet received by the HTTP / 2.0 from the mobile terminal 200 to the server device 300 after converting it to HTTP / 1.0. This conversion process may be performed by a functional unit other than the communication control unit 2 such as the communication transfer unit 3 and the prefetch information acquisition unit 6. In this way, the gateway device 100 has an effect that it can cope with a case where a communication protocol that can be used by the server device 300 is different from a communication protocol that can be used by the mobile terminal 200. As a result, the present embodiment can be applied to a general server device 300 that does not support HTTP / 2.0 without adding a special function.

Further, the prefetch information determination unit 101 on request of the gateway device 100 may extract the prefetch URL by a method based on both the installation information 104 and the history information 105. That is, when the request prefetch information determination unit 101 can extract the URL based on the setting information 104 (YES in step B213), the prefetch information determination unit 101 may further extract the prefetch URL based on the history information 105 (step B214). .
<Hardware configuration example>
1 and 2 in each embodiment described above may be configured by independent hardware circuits, or may be regarded as a function (processing) unit (software module) of a software program. it can. However, the division of each part shown in these drawings is a configuration for convenience of explanation, and various configurations can be assumed for mounting. An example of the hardware environment in such a case will be described with reference to FIG.

FIG. 10 is a diagram illustrating a configuration of a computer (information processing apparatus) applicable to each embodiment of the present invention and the information distribution system according to the modification. That is, FIG. 10 illustrates at least the information processing device 1, the terminal device 10, the

server devices

20 and 300, the gateway device (information processing device) 100, the mobile terminal (terminal device) 200, and the base station 400 in each of the above-described embodiments. A hardware configuration capable of realizing each function in the above-described embodiments, which is a configuration of a computer that can realize any one of them.

The computer 900 shown in FIG. 10 includes a CPU (Central Processing Unit) 901, a ROM (Read Only Memory) 902, a RAM (Random Access Memory) 903, a communication interface (IF) 904, a display 905, and a hard disk device (HDD) 906. These are connected via a bus 907. When the computer shown in FIG. 10 functions as the information processing device 1, the terminal device 10, the

server devices

20 and 300, the gateway device (information processing device) 100, the mobile terminal (terminal device) 200, or the base station 400, The display 905 need not always be provided.

Further, the communication interface 904 is a general communication means for realizing communication between the computers in each of the above-described embodiments. The hard disk device 906 stores a program group 906A and various storage information 906B. The program group 906A is, for example, a computer program for realizing a function corresponding to each block (each unit) shown in FIGS. 1 and 2 described above. The various storage information 906B is, for example, the prefetch storage information 15, the setting information 104, the history information 105, and the like illustrated in FIGS. In such a hardware configuration, the CPU 901 governs the overall operation of the computer 900.

The present invention described with reference to each of the embodiments described above is a block diagram (FIGS. 1 and 2), a sequence chart (FIGS. 4 and 3), or a flowchart (FIGS. 5 to 5) referred to in the description of each embodiment. This is achieved by supplying a computer program capable of realizing the function of FIG. 7) and then reading and executing the computer program on the CPU 901 of the hardware. The computer program supplied to the computer may be stored in a nonvolatile storage device (storage medium) such as the RAM 903 or the hard disk device 906 which is a readable / writable temporary storage memory.

In the above case, the computer program can be supplied to each apparatus by installing it in the apparatus via various recording media such as a floppy disk (registered trademark) or a CD-ROM (Compact Disc-ROM). Like the method to do now, a general procedure can be adopted. As a method of supplying a computer program into each device, a method of downloading from the outside via a communication network 1000 such as the Internet is also common. In such a case, the present invention can be understood to be configured by a computer-readable storage medium in which the code constituting the computer program or the code is recorded.

Note that a part or all of the above-described embodiment can be described as the following supplementary notes, but is not limited to the following supplementary notes.

(Appendix 1)
Communication control means for controlling communication between a server that distributes content and a terminal that requests content from the server;
Communication transfer means for relaying communication packets in communication between the server and the terminal;
Based on an information acquisition request for requesting the content received from the terminal, a stream to be used when transmitting prefetch information, which is content to be prefetched later, to the terminal, the information acquisition request, and the server Based on any of the information acquisition responses including the requested content received as a response to the information acquisition request from, the prefetching of the content of the same server as the destination of the information acquisition request or the transmission source of the information acquisition response Prefetch information determining means for determining as information, and determining a prefetch priority which is a priority when transmitting the prefetch information to the terminal as a priority lower than a predetermined priority for information having high real-time characteristics; ,
Prefetch notification means for transmitting to the terminal a prefetch notification including a stream identifier representing the stream and a prefetch information identifier representing the prefetch information;
Prefetch information acquisition means for acquiring the prefetch information from the server;
An information processing apparatus comprising: prefetch information transfer means for transmitting the acquired prefetch information to the terminal with the prefetch priority via a stream corresponding to the stream identifier notified in the prefetch notification.

(Appendix 2)
The communication control unit terminates an original stream that is a stream that has received the information acquisition request after transmitting all the communication packets included in the prefetch notification and the information acquisition response to the terminal. Information processing device.

(Appendix 3)
When the terminal is a mobile terminal capable of wireless communication,
The communication control means transmits, to the base station, a communication packet with a priority corresponding to the prefetch priority according to a protocol negotiated with the base station to which the terminal is connected. Information processing device.

(Appendix 4)
The information processing apparatus according to any one of appendices 1 to 3, wherein the information having a high real-time property includes at least the response to the information acquisition request.

(Appendix 5)
The prefetch information determination means includes a plurality of prefetch information determination means for determining the prefetch information by different determination methods, and each prefetch information determination means determines the prefetch information according to the determination method for determining the prefetch information. The information processing apparatus according to appendices 1 to 4, wherein priority is determined.

(Appendix 6)
The prefetch information determining means includes at least one of a prefetch information determining means for an information acquisition request and a prefetch information determining means for an acquired content as the determining means,
The prefetch information determination means for the information acquisition request is
At the time of determining the prefetch information, at least for the information indicating the destination of the content included in the information acquisition request,
Setting information that is highly likely to be acquired later for a specific destination and that describes the destination for other contents of the server, or
Determining the prefetch information based on history information that is information including a history in which the destination of content acquired from the server in the past by the terminal is recorded;
When determining the prefetch priority, determine the prefetch priority determined according to which of the setting information or the history information is determined,
The prefetch information determination means for the acquired content is
When determining the prefetching information, based on the requested content included in the response, determining the content of the same server as the source of the response as the prefetching information, and determining the prefetching priority Furthermore, the information processing apparatus of Claim 5 which determines the said prefetch priority defined according to the method of determining based on the said response.

(Appendix 7)
Information requesting means for transmitting an information acquisition request for requesting the content to the server to the information processing apparatus according to appendices 1 to 6;
Receiving the prefetch notification from the information processing apparatus, further receiving prefetch information based on the prefetch notification, and including prefetch information accumulation means for storing prefetch accumulation information including at least the received prefetch information,
When the new content is needed and the new content is stored as the prefetch storage information, the information requesting unit does not transmit an information acquisition request, and transmits the new content from the prefetch storage information. A terminal device that reads content and outputs the new content.

(Appendix 8)
Based on the information acquisition request for requesting the content received from the terminal, determine the stream to be used when transmitting to the terminal prefetch information that is the content to be prefetched later,
Based on either the information acquisition request and the information acquisition response including the requested content received as a response to the information acquisition request from the server that distributes the content, or the information acquisition request destination or the information Perform prefetch information determination processing for determining the content of the same server as the transmission source of the acquisition response as the prefetch information,
A prefetch priority that is a priority when transmitting the prefetch information to the terminal is determined as a priority lower than a predetermined priority for information with high real-time characteristics,
A prefetch notification including a stream identifier representing the stream and a prefetch information identifier representing the prefetch information is transmitted to the terminal;
Obtaining the prefetch information from the server;
The distribution method of transmitting the acquired prefetch information to the terminal with the prefetch priority via a stream corresponding to the stream identifier notified in the prefetch notification.

(Appendix 9)
The distribution method according to claim 8, wherein after transmitting all the communication packets included in the prefetch notification and the information acquisition response to the terminal, the original stream that is the stream that has received the information acquisition request is terminated.

(Appendix 10)
When the terminal is a mobile terminal capable of wireless communication,
The distribution method according to claim 8 or 9, wherein a communication packet with a priority corresponding to the prefetch priority is transmitted to the base station according to a protocol agreed with the base station to which the terminal is connected.

(Appendix 11)
The distribution method according to any one of appendices 8 to 10, wherein the information having a high real-time property includes at least the response to the information acquisition request.

(Appendix 12)
In the prefetch information determination process, the prefetch information is determined by a plurality of different determination methods.
The distribution method according to any one of appendices 8 to 11, wherein when the prefetch priority is determined, the prefetch priority is determined according to the determination method for determining the prefetch information.

(Appendix 13)
In the prefetch information determination process, the determination method includes at least one of a prefetch information determination method for an information acquisition request and a prefetch information determination method for an acquired content,
In the prefetch information determination method for the information acquisition request,
At the time of determining the prefetch information, at least for the information indicating the destination of the content included in the information acquisition request,
Setting information that is highly likely to be acquired later for a specific destination and that describes the destination for other contents of the server, or
Determining the prefetch information based on history information that is information including a history in which the destination of content acquired from the server in the past by the terminal is recorded;
In the prefetch information determination method for the acquired content,
When determining the prefetch information, based on the requested content included in the response, determine the same server content as the response sender as the prefetch information,
When determining the prefetch priority, it is determined depending on whether the prefetch information is determined based on the setting information, the history information, or the response. The distribution method according to claim 12, wherein the priority is determined as the prefetch priority.

(Appendix 14)
A communication control process for controlling communication between a server that distributes content and a terminal that requests content from the server;
A communication transfer process for relaying a communication packet in communication between the server and the terminal;
Based on an information acquisition request for requesting content received from the terminal, a stream determination process for determining a stream to be used when transmitting prefetch information, which is content prefetched later, to the terminal;
Based on either the information acquisition request and the information acquisition response including the requested content received as a response to the information acquisition request from the server, the destination of the information acquisition request, or the source of the response Prefetch information determination processing for determining content of the same server as the prefetch information;
A prefetch priority determination process for determining a prefetch priority that is a priority at the time of transmitting the prefetch information to the terminal as a priority lower than a predetermined priority for information with high real-time characteristics;
A prefetch notification transmission process for transmitting a prefetch notification including a stream identifier representing the stream and a prefetch information identifier representing the prefetch information to the terminal;
Prefetch information acquisition processing for acquiring the prefetch information from the server;
A first computer that causes the computer to execute a prefetch information transfer process of transmitting the acquired prefetch information to the terminal with the prefetch priority via the stream corresponding to the stream identifier notified in the prefetch notification; ·program.

(Appendix 15)
In the communication control process, after transmitting all the communication packets included in the prefetch notification and the information acquisition response to the terminal, the original stream that is the stream that has received the information acquisition request is terminated. The first computer program.

(Appendix 16)
When the terminal is a mobile terminal capable of wireless communication,
In the communication control process, a communication packet with a priority corresponding to the prefetch priority is transmitted to the base station according to a protocol agreed with the base station to which the terminal is connected. A first computer program.

(Appendix 17)
The first computer program according to any one of appendices 14 to 16, wherein the highly real-time information includes at least the response to the information acquisition request.

(Appendix 18)
In the prefetch information determination process, the prefetch information is determined by a plurality of different determination methods.
18. The first computer program according to any one of appendices 14 to 17, wherein, in the prefetch priority determination process, the prefetch priority is determined according to the determination method for determining the prefetch information.

(Appendix 19)
In the prefetch information determination process, the determination method includes at least one of a prefetch information determination method for an information acquisition request and a prefetch information determination method for an acquired content,
In the prefetch information determination method for the information acquisition request,
At the time of determining the prefetch information, at least for the information indicating the destination of the content included in the information acquisition request,
Setting information that is highly likely to be acquired later for a specific destination and that describes the destination for other contents of the server, or
Determining the prefetch information based on history information that is information including a history in which the destination of content acquired from the server in the past by the terminal is recorded;
In the prefetch information determination method for the acquired content,
When determining the prefetch information, based on the requested content included in the response, determine the same server content as the response sender as the prefetch information,
In the prefetch priority determination process, priority determined according to whether the prefetch information is determined based on the setting information, the historical information, or the response. The first computer program according to claim 18, wherein the degree is determined as the prefetch priority.

(Appendix 20)
Information request processing for transmitting an information acquisition request for requesting the content to the server to an information processing apparatus on which the first computer program operates according to any one of appendices 14 to 19,
Receiving the prefetch notification from the information processing apparatus, further receiving the prefetch information based on the prefetch notification, and executing prefetch information accumulation processing for storing prefetch accumulation information including at least the received prefetch information in a computer Let
In the information request process, when new content is needed, if the new content is stored as the prefetch storage information, the new request is not transmitted, and the new read content is not updated. A second computer program that reads content and outputs the new content.

The present invention has been described above using the above-described embodiment as an exemplary example. However, the present invention is not limited to the above-described embodiment. That is, the present invention can apply various modes that can be understood by those skilled in the art within the scope of the present invention.

This application claims priority based on Japanese Patent Application No. 2015-138534 filed on Jul. 10, 2015, the entire disclosure of which is incorporated herein.

DESCRIPTION OF SYMBOLS 1

Information processing apparatus

2, 11 Communication control part 3 Communication transfer part 4 Prefetch information determination part 5 Prefetch notification part 6 Prefetch information acquisition part 7 Prefetch information transfer part 10 Terminal device 12 Information request part 13 Prefetch

information storage part

14, 103 Storage device 15

Pre-read accumulation information

20, 300 Server device 100 Gateway device (information processing device)
101 Prefetch information determining unit upon request 102 Prefetching information determining unit on response 104 Setting information 105 History information 200 Mobile terminal (terminal device)
201 Application 400 Base station 900 Information processing apparatus (computer)
901 CPU
902 ROM
903 RAM
904 Communication interface (IF)
905 Display 906 Hard disk device (HDD)
906A Program group 906B Various stored information 907 Bus 1000 Network (communication network)

Claims

Communication control means for controlling communication between a server that distributes content and a terminal that requests content from the server;
Communication transfer means for relaying communication packets in communication between the server and the terminal;
Based on an information acquisition request for requesting the content received from the terminal, a stream to be used when transmitting prefetch information, which is content to be prefetched later, to the terminal, the information acquisition request, and the server Based on any of the information acquisition responses including the requested content received as a response to the information acquisition request from, the prefetching of the content of the same server as the destination of the information acquisition request or the transmission source of the information acquisition response Prefetch information determining means for determining as information, and determining a prefetch priority which is a priority when transmitting the prefetch information to the terminal as a priority lower than a predetermined priority for information having high real-time characteristics; ,
Prefetch notification means for transmitting to the terminal a prefetch notification including a stream identifier representing the stream and a prefetch information identifier representing the prefetch information;
Prefetch information acquisition means for acquiring the prefetch information from the server;
An information processing apparatus comprising: prefetch information transfer means for transmitting the acquired prefetch information to the terminal with the prefetch priority via a stream corresponding to the stream identifier notified in the prefetch notification.
The communication control means terminates the original stream, which is the stream that has received the information acquisition request, after transmitting all the communication packets included in the prefetch notification and the information acquisition response to the terminal. The information processing apparatus described.
When the terminal is a mobile terminal capable of wireless communication,
The communication control means transmits to the base station a communication packet with a priority corresponding to the prefetch priority according to a protocol negotiated with the base station to which the terminal is connected. The information processing apparatus described.
The information processing apparatus according to claim 1, wherein the information having a high real-time property includes at least the response to the information acquisition request.
The prefetch information determination means includes a plurality of prefetch information determination means for determining the prefetch information by different determination methods, and each prefetch information determination means determines the prefetch information according to the determination method for determining the prefetch information. The information processing apparatus according to claim 1, wherein priority is determined.
The prefetch information determining means includes at least one of a prefetch information determining means for an information acquisition request and a prefetch information determining means for an acquired content as the determining means,
The prefetch information determination means for the information acquisition request is
At the time of determining the prefetch information, at least for the information indicating the destination of the content included in the information acquisition request,
Setting information that is highly likely to be acquired later for a specific destination and that describes the destination for other contents of the server, or
Determining the prefetch information based on history information that is information including a history in which the destination of content acquired from the server in the past by the terminal is recorded;
When determining the prefetch priority, determine the prefetch priority determined according to which of the setting information or the history information is determined,
The prefetch information determination means for the acquired content is
When determining the prefetching information, based on the requested content included in the response, determining the content of the same server as the source of the response as the prefetching information, and determining the prefetching priority The information processing apparatus according to claim 5, wherein the prefetch priority determined according to a method of determining based on the response is determined.
An information requesting means for transmitting an information acquisition request for requesting the content to the server to the information processing apparatus according to any one of claims 1 to 6,
Receiving prefetch notification from the information processing apparatus, further receiving prefetch information based on the prefetch notification, and including prefetch information storage means for storing prefetch storage information including at least the received prefetch information,
When the new content is needed and the new content is stored as the prefetch storage information, the information requesting unit does not transmit the information acquisition request, and the new request is transmitted from the prefetch storage information. A terminal device that reads out a new content and outputs the read out new content.
Based on the information acquisition request for requesting the content received from the terminal, determine the stream to be used when transmitting to the terminal prefetch information that is the content to be prefetched later,
Based on either the information acquisition request and the information acquisition response including the requested content received as a response to the information acquisition request from the server that distributes the content, or the information acquisition request destination or the information Perform prefetch information determination processing for determining the content of the same server as the transmission source of the acquisition response as the prefetch information,
A prefetch priority that is a priority when transmitting the prefetch information to the terminal is determined as a priority lower than a predetermined priority for information with high real-time characteristics,
A prefetch notification including a stream identifier representing the stream and a prefetch information identifier representing the prefetch information is transmitted to the terminal;
Obtaining the prefetch information from the server;
The distribution method of transmitting the acquired prefetch information to the terminal with the prefetch priority via a stream corresponding to the stream identifier notified in the prefetch notification.
The delivery method according to claim 8, wherein after transmitting all the communication packets included in the prefetch notification and the information acquisition response to the terminal, the original stream that is the stream that has received the information acquisition request is terminated.
When the terminal is a mobile terminal capable of wireless communication,
The distribution method according to claim 8 or 9, wherein a communication packet with a priority corresponding to the prefetch priority is transmitted to the base station according to a protocol negotiated with a base station to which the terminal is connected.
The delivery method according to any one of claims 8 to 10, wherein at least the response to the information acquisition request is included as the highly real-time information.
In the prefetch information determination process, the prefetch information is determined by a plurality of different determination methods.
The distribution method according to any one of claims 8 to 11, wherein when the prefetch priority is determined, the prefetch priority is determined according to the determination method for determining the prefetch information.
In the prefetch information determination process, the determination method includes at least one of a prefetch information determination method for an information acquisition request and a prefetch information determination method for an acquired content,
In the prefetch information determination method for the information acquisition request,
At the time of determining the prefetch information, at least for the information indicating the destination of the content included in the information acquisition request,
Setting information that is highly likely to be acquired later for a specific destination and that describes the destination for other contents of the server, or
Determining the prefetch information based on history information that is information including a history in which the destination of content acquired from the server in the past by the terminal is recorded;
In the prefetch information determination method for the acquired content,
When determining the prefetch information, based on the requested content included in the response, determine the same server content as the response sender as the prefetch information,
When determining the prefetch priority, it is determined depending on whether the prefetch information is determined based on the setting information, the history information, or the response. The distribution method according to claim 12, wherein the priority is determined as the prefetch priority.
A communication control process for controlling communication between a server that distributes content and a terminal that requests content from the server;
A communication transfer process for relaying a communication packet in communication between the server and the terminal;
Based on an information acquisition request for requesting content received from the terminal, a stream determination process for determining a stream to be used when transmitting prefetch information, which is content prefetched later, to the terminal;
Based on either the information acquisition request and the information acquisition response including the requested content received as a response to the information acquisition request from the server, the destination of the information acquisition request, or the source of the response Prefetch information determination processing for determining content of the same server as the prefetch information;
A prefetch priority determination process for determining a prefetch priority that is a priority at the time of transmitting the prefetch information to the terminal as a priority lower than a predetermined priority for information with high real-time characteristics;
A prefetch notification transmission process for transmitting a prefetch notification including a stream identifier representing the stream and a prefetch information identifier representing the prefetch information to the terminal;
Prefetch information acquisition processing for acquiring the prefetch information from the server;
A first computer that causes the computer to execute a prefetch information transfer process of transmitting the acquired prefetch information to the terminal with the prefetch priority via the stream corresponding to the stream identifier notified in the prefetch notification; A recording medium for recording the program.
15. In the communication control process, after transmitting all the communication packets included in the prefetch notification and the information acquisition response to the terminal, the original stream that is the stream that has received the information acquisition request is terminated. The recording medium which records the 1st computer program of description.
When the terminal is a mobile terminal capable of wireless communication,
16. In the communication control process, a communication packet with a priority corresponding to the prefetch priority is transmitted to the base station according to a protocol negotiated with a base station to which the terminal is connected. A recording medium for recording the first computer program.
The recording medium for recording the first computer program according to any one of claims 14 to 16, wherein at least the response to the information acquisition request is included as the highly real-time information.
In the prefetch information determination process, the prefetch information is determined by a plurality of different determination methods.
The first computer program according to any one of claims 14 to 17, wherein, in the prefetch priority determination process, the prefetch priority is determined according to the determination method for determining the prefetch information. recoding media.
In the prefetch information determination process, the determination method includes at least one of a prefetch information determination method for an information acquisition request and a prefetch information determination method for an acquired content,
In the prefetch information determination method for the information acquisition request,
At the time of determining the prefetch information, at least for the information indicating the destination of the content included in the information acquisition request,
Setting information that is highly likely to be acquired later for a specific destination and that describes the destination for other contents of the server, or
Determining the prefetch information based on history information that is information including a history in which the destination of content acquired from the server in the past by the terminal is recorded;
In the prefetch information determination method for the acquired content,
When determining the prefetch information, based on the requested content included in the response, determine the same server content as the response sender as the prefetch information,
In the prefetch priority determination process, priority determined according to whether the prefetch information is determined based on the setting information, the historical information, or the response. The recording medium for recording the first computer program according to claim 18, wherein a degree is determined as the prefetching priority.
An information acquisition request for requesting the content from the server is sent to an information processing apparatus that operates the first computer program recorded in the recording medium according to any one of claims 14 to 19. Information request processing to be transmitted;
Receiving the prefetch notification from the information processing apparatus, further receiving the prefetch information based on the prefetch notification, and executing prefetch information accumulation processing for storing prefetch accumulation information including at least the received prefetch information in a computer Let
In the information request process, when new content is needed, if the new content is stored as the prefetch storage information, the new request is not transmitted, and the new read content is not updated. A recording medium for recording a second computer program for reading content and outputting the new content.