JP2006330978A - Display changing system corresponding to access line to internet, and communication terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To change display of a communication terminal in correspondence with an access line used by a communication terminal for gaining access to the Internet in a communication system in which a content is obtained from a server on the Internet and displayed in a communication terminal. <P>SOLUTION: The communication terminal is equipped with a display part 101, an access line information collection part 104, a content changing part 105, and a content acquisition part 106. When a content display request from a user is received, the content changing part 105 changes a URL of a content displayed in the display part 101 in correspondence with the access line information collected by the access line information collection part 104, and the content acquisition part 106 acquires the content of the URL and displays it in the display part 101. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a communication system in which a communication terminal acquires and displays content from a server in a communication field using an IP network such as the Internet, and in particular, displays the communication terminal according to a network environment to which the communication terminal is connected. It is related with the technology which can be changed.

  In recent years, various services using a Web browser have been provided. In this service, the Web server may want to change the content displayed on the Web browser of the communication terminal depending on the network environment to which the communication terminal is connected. For example, in order to differentiate between ISPs (Internet Service Providers), a specific content is provided only to a communication terminal connected to the ISP.

  Conventionally, there has been a method of changing the content sent by the Web server according to the IP address of the communication terminal, for example, as disclosed in Patent Document 1 as such a technology. The procedure for changing the content sent by the Web server by the ISP to which the communication terminal is connected will be described below using the technology of Patent Document 1.

  FIG. 22 shows an outline of a conventional communication system. In FIG. 22, the communication terminal 190 is equipped with a web browser and a display for displaying web content. The communication terminal 190 is assigned an IP address assigned by the ISP 300. The web server 590 returns web content in response to a request from the communication terminal 190. Further, the Web server 590 holds an IP address table indicating the range of IP addresses assigned to each ISP. The Internet 400 is a network based on the IPv4 protocol. The ISP 300 connects the communication terminal 190 to the Internet 400. The access line 200 is a communication line that connects the communication terminal 190 and the ISP 300, and is, for example, a telephone line (communication using a voice modem), an ADSL (Asymmetric Digital Subscriber Line), a cable television network, an optical fiber network, a wireless line, or the like.

  In this conventional communication system, the operation when the communication terminal 190 acquires and displays Web content from the Web server 590 will be described below.

  First, the communication terminal 190 transmits an HTTP (Hypertext Transfer Protocol) request including a URL (Uniform Resource Locator) indicating a desired Web content to the Web server 590 according to a user operation by the IP protocol. At that time, the transmitted IP packet includes the IP address of the communication terminal itself as the source address. The IP packet is delivered to the Web server 590 via the access line 200, ISP 300, and Internet 400.

  Here, the IP address is managed internationally so as not to overlap between devices, and a predetermined range of IP addresses is assigned to each organization such as an ISP, a company, or a university. Therefore, it is possible to determine which ISP or the like the communication terminal is connected to from the IP address of the communication terminal.

When receiving the HTTP request from the communication terminal 190, the Web server 590 acquires the IP address of the communication terminal 190 from the transmission source IP address of the IP packet storing the request, and searches the IP address table. If the correspondence between the IP address of the communication terminal and the ISP is included in the IP address table, the ISP to which the communication terminal is connected can be specified. As a result, the Web server 590 can transmit content corresponding to the ISP connected to the communication terminal to the communication terminal 190, and the communication terminal 190 can display content corresponding to the ISP 300 to which the communication server 190 is connected. .
JP 2001-312661 A

  However, in the conventional communication system, by using the IP address of the communication terminal, the content displayed on the communication terminal can be changed according to the ISP to which the communication terminal is connected, but the access to which the communication terminal is connected is possible. There was a problem that the display contents could not be changed depending on the line. There are various access lines such as telephone lines, ADSL, optical fiber networks, and transmission quality such as transmission speed, error rate, and transmission delay. In particular, when providing a broadband real-time service such as video distribution over an IP network, there is a possibility that a stable service cannot be provided if the transmission quality of the access line is poor. There is a demand to provide the service only when certain conditions are met.

  An object of the present invention is to provide a communication system capable of changing the content displayed on a communication terminal according to an access line to which the communication terminal is connected.

  In order to solve the above-mentioned conventional problems, a system according to the first invention of the present application includes an access line information collecting means for collecting information on an access line used when connecting a communication terminal to the Internet, and information on the access line. And a display changing means for changing the display content of the communication terminal. Thereby, the display content of the communication terminal can be changed according to the access line.

  The system according to the second invention of the present application is characterized in that an access line information collecting means and a display changing means are provided inside the communication terminal. As a result, the communication terminal becomes active, and the display content of the communication terminal can be changed according to the access line.

  The systems according to the third to sixth inventions of the present application are characterized in that an access line is provided with an information transmission device that transmits information of an access line to a communication terminal. As a result, it is possible to save the user of the communication terminal from manually setting access line information.

  The system according to the seventh invention of the present application is characterized in that the information on the access line is information for specifying a communication data relay device existing between the communication terminal and the server. As a result, it is possible to save the user of the communication terminal from manually setting access line information.

  The system according to the eighth invention of the present application is provided with an address list in which access line information and address information for acquiring content to be displayed on a communication terminal are uniquely associated, and the display change means supports the access line information. Address information to be acquired is obtained from an address list. As a result, the content acquired by the communication terminal can be changed according to the access line.

  In the system according to the ninth aspect of the present invention, the access line is an IP network, the address information transmitted from the information transmitting device is acquired by the access line information collecting means using IP multicast, and the display changing means is connected to the communication terminal. The address information held as the initial value is replaced with the acquired access line information. As a result, the content displayed by the communication terminal can be changed by the access line operator.

  The communication terminal according to the tenth invention of the present application includes an access line information collecting means for collecting information on an access line used when the communication terminal is connected to the Internet, and contents displayed on the display device according to the information on the access line. And a display changing means for changing. Thereby, the display content of the communication terminal can be changed according to the access line.

  The communication terminals according to the inventions 11 to 14 of the present application are characterized in that the access line information means obtains access line information transmitted from the information transmitting device provided for the access line to the communication terminal. As a result, it is possible to save the user of the communication terminal from manually setting access line information.

  A communication terminal according to a fifteenth aspect of the present invention is characterized in that access line information collecting means acquires information specifying a communication data relay device existing between a communication terminal and a server as access line information. As a result, it is possible to save the user of the communication terminal from manually setting access line information.

  A communication terminal according to a sixteenth invention of the present application includes an address list in which access line information and address information for acquiring content to be displayed on the communication terminal are uniquely associated with the communication terminal. Address information corresponding to the information is acquired from the address list. As a result, the content acquired by the communication terminal can be changed according to the access line.

  In the communication terminal according to the seventeenth aspect of the present invention, the access line is an IP network, the address information transmitted from the information transmitting apparatus is acquired by the access line information collecting means using IP multicast, and the display changing means The address information held as the initial value is replaced with the acquired access line information.

  The present invention makes it possible to change the content displayed on the communication terminal in accordance with the Internet access line used by the communication terminal.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment 1)
In the present embodiment, the URL corresponding to the access line information collected from the ISP by the communication terminal is selected from the URL list held in advance by the communication terminal, and the contents of the approximate URL are displayed on the screen of the communication terminal. The scene to be described is explained as a model case.

  FIG. 1 is a diagram showing an overview of a display change system according to an access line in the present invention.

  In FIG. 1, the communication terminal 100 acquires content from a Web server 500 connected to the Internet 400 and displays the content. The communication terminal 100 may be a home appliance compatible with a network such as a PC, a TV, or a DVD recorder, but is not limited thereto.

  The access line 200 is a line for the communication terminal 100 and the like to communicate with the ISP 300. The access line 200 is a fixed telephone line using a technique such as ADSL or an optical fiber, for example. In general, the communication speed between the communication terminal 100 and the ISP 300 is characterized by the line quality of the access line 200.

  The ISP 300 gives access to the Internet 400 by giving an IP address to the communication terminal 100.

  The Web server 500 is installed on the Internet 400, supports a communication protocol such as HTTP, and provides content to the communication terminal 100. In the present embodiment, the domain name of the Web server 500 is “www.aaa.co.jp”.

  FIG. 2 is a diagram showing an internal configuration of the ISP 300.

  In FIG. 2, an ISP 300 accommodates a plurality of access lines 200 (hereinafter, access lines 200a to 200n) and is connected to the Internet 400.

  The same number of routers 301 as the access lines 200a to 200n exist, and are connected to the access lines 200a to 200n, respectively. Hereinafter, the router 301 corresponding to the access line 200a is described together with the symbol of the router 301a.

  The router 302 is installed between the Internet 400 and the routers 301a to 301n.

  That is, in the configuration of the ISP 300 shown in FIG. 2, an IP packet transmitted from the communication terminal connected to the access line 200a to the Internet 400 always passes through the router 301a.

  FIG. 3 is a diagram illustrating an internal configuration of the communication terminal 100.

  In FIG. 3, the display unit 101 displays content acquired from the Web server 500. In the present embodiment, display unit 101 is assumed to be a display device built in communication terminal 100 such as a liquid crystal panel, but may be an external monitor connected to a video output terminal included in communication terminal 100.

  The remote control light receiving unit 102 receives a remote control signal operated by the user.

  The URL list 103 is a correspondence table between access line information and URLs for determining access lines. FIG. 4 shows an example of the URL list. In the URL list 103 shown in FIG. 4, the IP address of the router 301 as the access line information corresponds to the URL of the content held by the Web server 500.

  The access line information collection unit 104 is an access line information collection unit in the present invention, and collects information for identifying the access line 200. When the URL list 103 shown in FIG. 4 is used, the access line information collection unit 104 collects the IP address of the router 301 used by the communication terminal 100.

  The content changing unit 105 is a display changing unit in the present invention, searches the URL list 103, and acquires the URL of the content corresponding to the access line information collected by the access line information collecting unit 104.

  The content acquisition unit 106 acquires the content of the URL instructed from the content change unit 105 and displays it on the display unit 101. The content acquisition unit 106 may be, for example, a Web browser or a video display application, but is not limited thereto.

  The operation of communication terminal 100 in the present embodiment will be described below using the flowchart shown in FIG.

  The user transmits a content acquisition request to the communication terminal by remote control operation (step S100). The content acquisition request corresponds to, for example, an operation for starting a Web browser or an operation for displaying a Web browser home page. The access line information collection unit 104 that has received the content acquisition request via the remote control light receiving unit 102 executes a traceroute command to the Web server 500 and notifies the content change unit 105 of the result (step S110). The traceroute command is a standard command implemented in UNIX (registered trademark) or the like, and collects the IP addresses of all routers serving as IP packet transfer paths when the communication terminal 100 accesses the Web server 500. it can. The IP address collected by traceroute always includes the P address of the router 301 corresponding to the access line used by the communication terminal 100. The content change unit 105 compares the notified router IP address with the IP address of the router 301 described in the URL list 103 one by one, acquires the URL of the corresponding content, and notifies the content acquisition unit 106 (Step S120). The content acquisition unit 106 accesses the notified URL, acquires the corresponding content, and displays it on the display unit 101.

  That is, when the communication terminal 100 uses the access line 200a, the IP address “123.123.313.1” of the router 301a is included in the execution result of step S110, and the URL “http: // www” is included in step S120. .Aaa.co.jp / a.html "is obtained, and the corresponding content is acquired from the Web server 500 and displayed in step S130. Similarly, when the communication terminal 100 uses the access line 200c, the content corresponding to the URL “http://www.aaa.co.jp/c.html” is displayed. When the communication terminal 100 uses an access line that is not assumed in the URL list 103, the content corresponding to the URL “http://www.aaa.co.jp/default.html” is displayed.

  Note that by storing the IP address from which the URL was obtained from the URL list 103 in step S120 in a memory or the like, step S110 is executed only when the flow of FIG. 5 is executed for the first time, and step S110 is omitted after the second time. You can also In this case, the time from when the user issues a content acquisition request until the content is displayed can be shortened.

  According to the configuration described above, when a content display application such as a Web browser is activated, it is possible to automatically display content corresponding to the access line.

  Although the display change system according to the access line in the embodiment of the present invention has been described above, this is an example, and the present invention is not limited to this embodiment.

  In this embodiment, the access line information is automatically collected, but may be set manually by the user. For example, in the initial setting of the communication terminal 100, a character string such as an operator of the access line, a technique used, and a medium may be input. In this case, a URL list 103 using an access line character string may be used as access line information as shown in FIG.

  In addition, when the access line provider provides IP telephone service and the IP telephone company can be assigned from the IP telephone number, the URL list 103 using the IP telephone number as the access line information as shown in FIG. Available.

(Embodiment 2)
In the present embodiment, the URL corresponding to the information automatically collected from the access line by the communication terminal is selected from the URL list acquired by the communication terminal from the Web server, and the content of the approximate URL is displayed on the screen of the communication terminal. The scene is explained as a model case.

  FIG. 8 is a diagram showing an overview of the display change system according to the access line in the present embodiment. In FIG. 8, the same components as those in FIG. 1 are denoted by the same reference numerals, and only items to be supplemented in the present embodiment will be described.

  In FIG. 8, the communication terminal 100 is compatible with both IPv4 and IPv6 protocols in the present embodiment, and has a function of acquiring and displaying content from both IPv4 and IPv6 networks.

  The access line 210 is a line used for the communication terminal 100 to communicate with the ISP 300. In the present embodiment, the access line 210 uses IPv6 as an upper protocol, and all communication data between the communication terminal 100 and the ISP 300 is encapsulated in IPv6 packets.

  Here, IPv6 will be described. In order to set an IPv6 address in a communication terminal compatible with IPv6, two methods are mainly used. The first is a method using DHCP (Dynamic Host Configuration Protocol) which is also used in IPv4, and the other is a method in which a communication terminal automatically determines an IPv6 address. Hereinafter, a method for the communication terminal to automatically determine the IPv6 address will be described. The IPv6 address has a length of 128 bits, and can be divided into the first 64 bits called an IPv6 network address and the second 64 bits called a host address. The IPv6 network address is periodically notified to the IPv6 compatible communication terminal from the IPv6 router. The IPv6 compatible communication terminal generates the received IPv6 network address from the Ethernet (registered trademark) MAC address or the like. The own IPv6 address is determined by combining the host addresses. At this time, a communication terminal compatible with IPv6 sets the IPv6 router that has notified the network address as a default gateway. A communication terminal that cannot receive a network address due to reasons such as the absence of an IPv6 router adds an IPv6 network address called a link local address to determine its own IPv6 address. At this time, a communication terminal compatible with IPv6 does not set a default gateway.

  The Internet 400 is a network composed of devices compatible with IPv4.

  FIG. 9 is a diagram illustrating an internal configuration of the communication terminal 100. 9, the same components as those in FIG. 3 are denoted by the same reference numerals, and only items to be supplemented in the present embodiment will be described.

  The URL list 103 is acquired from the Web server 500 in the present embodiment, and uses an IPv6 address network address as access line information as shown in FIG. 10, for example.

  The access line information collection unit 104 acquires the IPv6 address of the communication terminal 100 when using the URL list 103 shown in FIG. Note that the IPv6 address collected by the access line information collection unit 104 is not the IPv6 address of its own, but the IPv6 network address notified from the access line 210 such as the address of the default gateway and the DNS (Domain Name System) server is identified. Any information can be used.

  The content acquisition unit 106 uses the IPv6 encapsulation unit 107 only when communicating with an IPv4 device such as the Web server 500.

  The IPv6 encapsulation unit 107 is used when data is transmitted and received between the communication terminal 100 and the ISP 300. The IPv6 encapsulation unit 107 encapsulates the IPv4 packet to be transmitted to the ISP 300 with the IPv6 packet, and transmits it to the ISP 300 via the access line 210 that is an IPv6 network. Further, the IPv6 encapsulation unit 107 extracts an IPv4 packet from the IPv6 packet received from the ISP 300 and passes it to a communication unit such as the content acquisition unit 106.

  The operation of the communication terminal 100 when the URL list 103 shown in FIG. 10 is used will be described below with reference to the flowchart shown in FIG.

  The user transmits a content acquisition request to the communication terminal by remote control operation (step S100). The content acquisition request corresponds to, for example, an operation for starting a Web browser or an operation for displaying a home page. The content acquisition unit 106 that has received the content acquisition request via the remote control light receiving unit 102 acquires and stores the URL list 103 from the Web server 500 using the URL that is held in advance (step S101). The access line information collection unit 104 checks its own IPv6 address, acquires the IPv6 network address, and notifies the content change unit 105 (step S111). The content change unit 105 acquires the corresponding URL from the URL list 103 using the IPv6 network address, and notifies the content acquisition unit 106 (step S120). The content acquisition unit 106 acquires the content of the notified URL and displays it on the display unit 101 (step S130).

  That is, when the IPv6 network address of the communication terminal 100 is “fedc: ba98: 7654: 3210”, the content “http://www.aaa.co.jp/a.html” is displayed on the display unit 101. Similarly, when the IPv6 network address of the communication terminal 100 is “ba98: 7654: 3210: fedc”, the content “http://www.aaa.co.jp/b.html” is displayed on the display unit 101. When the IPv6 network address of the communication terminal 100 is an address that is not assumed in the URL list 103 such as a link local address, the content corresponding to the URL “http://www.aaa.co.jp/default.html” indicate.

  As mentioned above, although the system in embodiment of this invention was demonstrated, this is an example and is not limited to this embodiment.

  For example, as shown in FIG. 12, in the case of a system in which the content server 700 is added to the system shown in FIG. 8, the communication confirmation result between the communication terminal 100 and the content server 700 can be used as access line information.

  In FIG. 12, the content server 700 is installed on the access line 210. As the IPv6 address of the content server 700, an individual IPv6 address is set for each access line 210. For example, when there are an access line 210a and an access line 210b using IPv6 as in the case of the access line 210, and the content server 700a and the content server 700b are installed, the content server 700a and the content server 700b have different IPv6 addresses. That's it.

  In this case, the URL list 103 uses the IPv6 address of the content server 700 as access line information, as shown in FIG.

  The operation of the communication terminal 100 in this case is as follows. For example, the ping implemented in UNIX (registered trademark) as standard with respect to the IPv6 address of the content server 700 described in the URL list 103 in step S111 of FIG. Execute communication confirmation with commands. In step S120, the URL of the content is acquired from the URL list 103 shown in FIG. 13, using the IPv6 address whose communication has been confirmed.

  In FIG. 12, the content server 700 can also transmit access line information using IPv6 multicast to the communication terminal using the access line 210. For example, the content server 700 broadcasts an access line character string used in the URL list 103 shown in FIG. At this time, the access line information collection unit 104 may receive an access line character string transmitted by IPv6 multicast.

Further, when the content server 700 uses an individual multicast address / port number combination for each access line 210, the multicast address / port number combination can be used as access line information. For example, a multicast stream having a different multicast address / port number flows through the access line 210a and the access line 210b described above. FIG. 14 shows the URL list 103 in this case.
In the present embodiment, the case where access line information is collected from an access line using the IPv6 protocol has been described, but a cable television (hereinafter referred to as CATV) network may be used for the access line. In this case, the communication terminal 100 is a CATV STB (Set Top Box) with a built-in cable modem as shown in FIG. In FIG. 15, a cable modem 121 is a modem device for performing IP communication over a CATV network. The CATV broadcast receiver 122 is a device for receiving a CATV network broadcast signal. In this case, for example, when the CATV network multiplexes and broadcasts a program using MPEG2-TS, a TS packet (hereinafter referred to as an access line identification packet) for identifying an access line is multiplexed and broadcasted in advance. The access line identification packet has a predetermined PID (Packet ID) and includes an access line character string used in the URL list 103 shown in FIG. The access line acquisition unit 104 may acquire an access line identification packet from the CATV broadcast reception unit 122.

  In this embodiment, the conversion table such as the URL list 103 has been described. However, for example, the same effect can be obtained by adding a new attribute to HTML (Hypertext Markup Language). For example, a new attribute “if” is added to the <img> tag to which a still image is pasted, and the still image described in the src attribute is acquired only when it corresponds to the “if” attribute. More specifically, in the acquired HTML file, <img src = “a.jpg” if = ”fedc: ba98: 7654: 3210”> <img src = “b.jpg” if = “ba98: 7654 : 3210: fedc "> and the line information collection unit 104 collects" fedc: ba98: 7654: 3210 "as access line information, a. If jpg is acquired and displayed and “ba98: 7654: 3210: fedc” is collected, b. jpg is acquired / displayed, otherwise nothing is acquired / displayed.

  The operation of the communication terminal 100 in this case will be described using the flowchart of FIG. Steps S100 to S111 are as already described. Next, the content acquisition unit 106 first acquires the HTML content of the URL stored in advance or the URL specified by the user (step S131). If the acquired HTML content has an if attribute tag, the content acquisition unit S106 determines whether or not the IPv6 network address acquired in step S111 matches (step S132). If they match, the process returns to step S131, and the content of the URL described by the src attribute is acquired. If they do not match in step S132, the content acquisition unit 106 determines whether content to be acquired remains in the content described in the acquired HTML file (step S133). When content to be acquired remains, the process returns to step S131 to acquire content. If there is no content to be acquired in step S133, the content acquisition unit 106 creates a screen by combining the acquired content and displays the screen on the display unit 101 (step S134).

  According to the configuration described above, when a content display application such as a Web browser is activated, it is possible to automatically display content corresponding to the access line. Furthermore, the administrator of the Web server can determine the content to be displayed on the communication terminal.

(Embodiment 3)
In the present embodiment, a case where a communication terminal acquires a URL from a server installed on an access line and displays the content of the approximate URL on the screen of the communication terminal will be described as a model case.

  This embodiment will be described using a display change system corresponding to the access line shown in FIG. Since FIG. 12 is described in the second embodiment, only items to be supplemented in the present embodiment will be described below.

  The Web server 500 is installed on the Internet 400 and holds two HTML files, content A and content B.

  The content server 700 is a content server installed on the access line 210, and transmits a URL for accessing the content A to the communication terminal connected to the access line 210 by IPv6 multicast.

  FIG. 17 is a diagram showing an internal configuration of the communication terminal 100. In FIG. 17, the same components as those in FIG. 9 are denoted by the same reference numerals, and only items to be supplemented in this embodiment will be described.

  The URL recording unit 108 stores a URL for accessing the content B in advance, but the content changing unit 105 can overwrite the new URL. Furthermore, the URL recording unit 108 can return to the URL (the URL for accessing the content B) before being overwritten by the content changing unit 105 under certain conditions such as a request from the user.

  The operation of communication terminal 100 in the present embodiment will be described below using the flowchart shown in FIG.

  When the communication terminal 100 is activated (step S200), it waits until an event occurs (step S201). When the access line information collection unit 104 receives a URL for accessing the content A transmitted from the content server 700 (step S202), the content change unit 105 records the URL recorded in the URL recording unit 108 with the received URL. Is overwritten (step S203). When the remote control light receiving unit 102 detects a content acquisition request transmitted by the user to the communication terminal by a remote control operation (step S204), the content change unit 105 displays the URL content recorded in the URL recording unit 108 as an IPv6 encapsulation unit. The information is acquired via 107 and displayed on the display unit 101 (step S205).

  That is, when the user transmits a content acquisition request to the communication terminal, if the URL of the URL recording unit 108 is not updated, the URL for accessing the content B is described in advance. When B is acquired / displayed and the URL of the URL recording unit 108 is updated, the content acquiring unit 106 acquires / displays the content A.

  According to the configuration described above, when a content display application such as a Web browser is activated, it is possible to automatically display content corresponding to the access line. Further, the administrator of the access line can determine the content to be displayed on the communication terminal.

(Embodiment 4)
In the present embodiment, a DNS (Domain Name System) server installed on the access line is requested to resolve the name of the URL held in advance by the communication terminal, and the content of the approximate URL is displayed on the screen of the communication terminal. This will be described as a model case.

  FIG. 19 is a diagram showing an overview of a display change system according to an access line in the present embodiment.

  In FIG. 19, the same components as those in FIG. 8 are denoted by the same reference numerals, and only items to be supplemented in the present embodiment will be described.

  The Web server 500 is installed on the Internet 400 and holds content A having a file name “contents.html”.

  The Web server 550 is installed on the Internet 400 and holds a content B having a file name “contents.html”. However, although content A and content B have the same file name, they are completely different content.

  The DNS server 800 is installed in the communication line 210, and is notified to a communication terminal using the communication line 210 using a protocol such as DHCP.

  DNS server 850 is installed in ISP 300 and can be used regardless of the type of access line as long as it is a communication terminal connected to ISP 300.

  Both the DNS server 800 and the DNS server 850 hold the IP address for the domain name “www.aa.co.jp”, but the DNS server 800 holds the IP address of the Web server 500. Holds the IP address of the Web server 550.

  FIG. 20 is a diagram illustrating an internal configuration of the communication terminal 100. In FIG. 20, the same components as those in FIG. 9 are denoted by the same reference numerals, and only items to be supplemented in the present embodiment will be described.

  The name resolution unit 109 uses the DNS server 800 and the DNS server 850 to acquire an IP address from the server domain name.

  The operation of communication terminal 100 in the present embodiment will be described below using the flowchart shown in FIG.

  The user transmits a content acquisition request to the communication terminal by a remote control operation (step S300). The content acquisition unit 106 that has received the user's content acquisition request via the remote control light receiving unit 102 acquires the content of the URL “http://www.aa.co.jp/contents.html” held in advance. The name resolution unit 109 is requested to resolve the name “www.aa.co.jp” (step S310). The name resolution unit 109 first makes an inquiry to the DNS 800 (step S320), and determines whether an IP address can be acquired (step S330). If the IP address cannot be obtained from the DNS 800, an inquiry is made to the DNS server 850 (step S340) to determine whether the IP address can be obtained (step S350). If the IP address of the Web server 550 cannot be acquired from the DNS 850, the content acquisition unit 106 displays on the display unit 101 that DNS name resolution has not been performed (step S360). When the IP address can be acquired in step S330 or step S350, the content acquisition unit 106 acquires and displays the content (step S370). If the IP address is acquired in step S330, the content acquired / displayed in step S370 is the content A of the Web server 500. If the IP address is acquired in step S350, the content acquired / displayed in step S370 is It becomes the content B of the Web server 550.

  According to the configuration described above, when a content display application such as a Web browser is activated, it is possible to automatically display content corresponding to the access line. Further, the administrator of the access line can determine the content to be displayed on the communication terminal.

  The display change system according to the present invention according to the access line to the Internet, the communication terminal, and the server display on the Web browser or the like of the communication terminal according to the access line to the Internet used by the communication terminal. Since the contents can be changed, it is useful for a system for changing a service provided to a communication terminal in accordance with the type, quality, operator, etc. of the access line.

Configuration diagram of a display change system according to an access line in Embodiment 1 of the present invention Internal configuration diagram of ISP 300 in the first embodiment of the present invention The internal block diagram of the communication terminal 100 in Embodiment 1 of this invention. The figure which shows the URL list | wrist 103 in Embodiment 1 of this invention. Flowchart of communication terminal 100 according to Embodiment 1 of the present invention. The figure which shows an example of the URL list | wrist 103 in Embodiment 1 of this invention. The figure which shows an example of the URL list | wrist 103 in Embodiment 1 of this invention. Configuration diagram of display change system according to access line in embodiment 2 of the present invention The internal block diagram of the communication terminal 100 in Embodiment 2 of this invention. The figure which shows the URL list | wrist 103 in Embodiment 2 of this invention. Flowchart of communication terminal 100 according to Embodiment 2 of the present invention. The figure which shows an example of the display change system structure according to the access line in Embodiment 2 of this invention The figure which shows an example of the URL list | wrist 103 in Embodiment 2 of this invention. The figure which shows another example of the URL list | wrist 103 in Embodiment 2 of this invention. The figure which shows an example of an internal structure of the communication terminal 100 in Embodiment 2 of this invention. The figure which shows an example of the flowchart of the communication terminal 100 in Embodiment 2 of this invention. The internal block diagram of the communication terminal 100 in Embodiment 3 of this invention. Flowchart of communication terminal 100 according to Embodiment 3 of the present invention. The figure which shows an example of the display change system structure according to the access line in Embodiment 4 of this invention The internal block diagram of the communication terminal 100 in Embodiment 4 of this invention. Flowchart of communication terminal 100 according to Embodiment 4 of the present invention. Conventional system configuration diagram

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Communication terminal 101 Display part 102 Remote control light-receiving part 103 URL list 104 Access line information collection part 105 Content change part 106 Content acquisition part 107 IPv6 encapsulation part 108 URL recording part 109 Name resolution means 121 Cable modem 122 CATV broadcast receiving part 190 Conventional example Communication terminal 200 access line 200a-n access line 210 access line 300 ISP
301a-n router 302 router 400 internet 500 web server 550 web server 700 content server 800 DNS server 850 DNS server

Claims (17)

In a system for acquiring content to be displayed on a communication terminal from a server connected to the Internet, an access line information collecting means for collecting information on an access line used when the communication terminal is connected to the Internet; A display change system comprising: display change means for changing display contents of a communication terminal according to information. The display change system according to claim 1, wherein the access line information collection unit and the display change unit are provided inside the communication terminal. The display change system according to claim 2, wherein the access line includes an information transmission device that transmits information on the access line to the communication terminal. 4. The display change system according to claim 3, wherein the access line is an IP network, and information on the access line is transmitted from the information transmitting apparatus to the communication terminal by IP multicast. 4. The access line is an IPv6 network, the information transmission apparatus is an IPv6 router, and the access line information is an IPv6 address prefix that the IPv6 router transmits to a communication terminal. Display change system. The access line is a cable television broadcast network, the information transmission device is a cable television broadcast device, and the access line information is multiplexed in the television data broadcast from the broadcast device to the communication terminal. The display change system according to claim 3. 3. The system according to claim 2, wherein the access line information is information for identifying a communication data relay device existing between the communication terminal and the server. An address list that uniquely associates the information on the access line with the address information for acquiring the content to be displayed on the communication terminal, and the display changing unit includes the address information corresponding to the information on the access line. The system according to claim 2, wherein the system is obtained from an address list. The access line is an IP network, and the access line information collection unit acquires the address information transmitted from the information transmission device using IP multicast,
4. The system according to claim 3, wherein the display changing unit replaces address information held as an initial value in the communication terminal with the acquired access line information. A communication terminal for acquiring content to be displayed from a server connected to the Internet, an access line information collecting means for collecting information on an access line used when the communication terminal is connected to the Internet; A communication terminal comprising: a display changing unit that changes contents displayed on the display device in accordance with information. 11. The communication terminal according to claim 10, wherein the access line information means acquires information on the access line transmitted to the communication terminal from an information transmission device provided on the access line. 12. The communication terminal according to claim 11, wherein the access line is an IP network, and the access line information collecting unit acquires the information of the access line transmitted from the information transmitting apparatus using IP multicast. . 12. The communication according to claim 11, wherein the access line is an IPv6 network, the information transmission device is an IPv6 router, and an IPv6 address prefix transmitted from the IPv6 router is acquired by the access line information collection unit. Terminal. The access line is a cable television broadcasting network, the information transmitting device is a cable television broadcasting device, and the access line information collecting means is used to collect information on the access line multiplexed in the television data broadcast by the broadcasting device. The communication terminal according to claim 11, wherein the communication terminal is acquired by: 11. The communication terminal according to claim 10, wherein information identifying a communication data relay device existing between the communication terminal and the server is acquired by the access line information collecting unit as information on the access line. The communication terminal comprises an address list that uniquely associates the information on the access line with the address information for acquiring the content to be displayed on the communication terminal, and the display changing unit corresponds to the information on the access line. 16. The communication terminal according to claim 10, wherein address information is acquired from the address list. The access line is an IP network, and the access line information collection unit acquires the address information transmitted from the information transmission device using IP multicast,
12. The communication terminal according to claim 11, wherein the display changing unit replaces address information held as an initial value in the communication terminal with the acquired access line information.

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