JP2004104699A - Network system - Google Patents

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Publication number
JP2004104699A
JP2004104699A JP2002267211A JP2002267211A JP2004104699A JP 2004104699 A JP2004104699 A JP 2004104699A JP 2002267211 A JP2002267211 A JP 2002267211A JP 2002267211 A JP2002267211 A JP 2002267211A JP 2004104699 A JP2004104699 A JP 2004104699A
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JP
Japan
Prior art keywords
server
center
branch
lan
karaoke
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2002267211A
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Japanese (ja)
Inventor
Kazuhiro Iwashita
Kanehisa Tsurumi
岩下 和裕
鶴見 兼久
Original Assignee
Yamaha Corp
ヤマハ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yamaha Corp, ヤマハ株式会社 filed Critical Yamaha Corp
Priority to JP2002267211A priority Critical patent/JP2004104699A/en
Publication of JP2004104699A publication Critical patent/JP2004104699A/en
Application status is Pending legal-status Critical

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Abstract

To enable easy communication via a VPN between a center-side server provided in a center and a plurality of clients in a branch office, and to establish a communication between the branch-side server and each client through a LAN in the branch office. A network system is configured so that data can be easily transmitted between the network systems.
An electronic table of contents terminal (71, 72) arranged on a LAN (81) of a karaoke store (101) performs data transmission using a local address assigned to an electronic table of contents server (51) within a first network address. Communication between the distribution server 11 on the center side and the karaoke device 61 of the karaoke store is performed by VPN using a local address in the second network address different for each karaoke store side router.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a network system that distributes predetermined data from a center to a branch via a network.
[0002]
[Prior art]
2. Description of the Related Art Systems connecting a center and a branch (branch) via a network and distributing some data from the center to a plurality of branches are configured in various fields.
For example, in a communication karaoke system, a communication karaoke device that receives distribution of karaoke music data from a center is provided in each karaoke store. 2. Description of the Related Art A conventional communication karaoke apparatus is configured to receive distribution of music data by communicating with a distribution server provided at a center via a public telephone line (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-9-127964 (page 3, FIG. 1)
[0004]
[Problems to be solved by the invention]
However, in the communication via the public telephone line, the distribution server must communicate with each karaoke device one-to-one, which is inefficient and requires a telephone charge for each communication with each karaoke device. Distributing music data to each of the karaoke devices requires a considerable communication fee.
[0005]
Therefore, it is conceivable to receive music data distribution from a saver at the center via the Internet via one router for each karaoke store. If the center and the karaoke shop are connected to each other like a virtual private network using a VPN (Virtual Private Network), secure communication can be performed.
[0006]
On the other hand, apart from such distribution of music data, there is also a place where a LAN is already set up in a karaoke shop. For example, there has been a use in which a server for searching for karaoke music data is provided in the LAN, and the music data is searched for by operation from a terminal in the karaoke room.
[0007]
However, since the network based on the VPN is a virtually closed private network, in order to access the server of the karaoke store using the private IP address used in the VPN, the server provided in the karaoke store also needs a VPN. Must be newly incorporated within. However, it is practically impossible to change the network settings of a server already installed in a karaoke store. If a server designed to change the setting of the private IP address is newly installed, it is not impossible to set the server so that it can be used in the VPN. Setting up the entire environment is extremely complicated. Therefore, it is not possible to adopt a mode in which the server or the communication karaoke apparatus can be operated simply by being installed in the karaoke shop.
[0008]
The above-mentioned matter is not only a problem relating to the network system of the karaoke shop and its center, but also a common problem relating to a network system which distributes predetermined data from the center to the branch office via the network.
[0009]
SUMMARY OF THE INVENTION It is an object of the present invention to facilitate communication between a center server provided in a center and a plurality of clients in a branch via a VPN, and to communicate with a branch server via a LAN in the branch. An object of the present invention is to provide a network system capable of easily performing data transmission with each client.
[0010]
[Means for Solving the Problems]
The invention according to claim 1, wherein a branch-side server disposed on a LAN in a branch, a plurality of clients disposed on the LAN in the branch and performing data transmission between the branch-side server, A plurality of branch-side networks each provided with a branch-side router for performing routing between the LAN and the WAN, a center-side server disposed in a LAN in the center, A center-side network provided between the LAN and the WAN, the center-side network including a center-side router that performs routing between the LAN and the WAN,
The branch server and the client have means for performing data transmission between the branch server and the client using an IP address in the first network address assigned to the branch server, and The branch router performs data encryption and IP address encapsulation between the center LAN and the branch LAN by using an IP address in a second network address different for each branch router. It is characterized by comprising means for transmitting data via a virtual network.
[0011]
According to a second aspect of the present invention, in the first aspect of the present invention, the center-side server includes means for distributing karaoke music data to the client, and the client reproduces the music data stored in the distribution. It is characterized by comprising means for reproducing music based on music data corresponding to the instruction.
[0012]
According to a third aspect of the present invention, in the first or second aspect of the present invention, the center-side server includes means for distributing karaoke music data to the branch-side server, and the branch-side server is configured to search from the client. It is characterized by comprising means for retrieving the song data of the corresponding karaoke in response to a request and outputting it to the client.
[0013]
According to the present invention, the branch server and the client can perform data transmission using the first network address, and the center server and the client communicate with the second network via a virtual private network (VPN). Data transmission can be performed using the address.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a configuration diagram of a karaoke network system to which the present invention is applied. In FIG. 1, reference numeral 100 denotes a center for distributing karaoke music data and the like, and reference numerals 101 and 102 denote karaoke stores corresponding to the branches according to the present invention. In the center 100, reference numeral 3 denotes a center-side LAN. The center-side LAN 3 includes distribution servers 11, 12 corresponding to the center-side server according to the present invention, and a center-side router 2.
The distribution server 11 includes a communication unit 11a for communicating via the LAN 3 or the Internet 10, a control unit 11b for performing a distribution process of music data, and a storage unit 11c for storing the music data.
In the karaoke store 101, reference numeral 81 denotes a karaoke store side LAN corresponding to the branch office side LAN according to the present invention. The karaoke store side LAN 81 includes a karaoke store side router 41 corresponding to the branch side router according to the present invention, an electronic contents table server 51 corresponding to the branch side server according to the present invention, and a karaoke device corresponding to the client according to the present invention. ., And electronic table of contents terminals 71, 72,.
.., R1m are karaoke rooms, and karaoke apparatuses 61, 62,... And electronic table of contents terminals 71, 72,. The electronic table of contents server 51 and the router 41 are installed in an office or the like separate from the karaoke room.
[0015]
The karaoke apparatus 61 includes a communication unit 61a for communicating via the LAN 81 or the Internet 10, a control unit 61b for performing processing for receiving distribution of music data, and a storage unit 61c for storing the music data and the like. The same applies to other karaoke devices.
The electronic table of contents server 51 includes a communication unit 51 a for communicating via the LAN 81 or the Internet 10, a control unit 51 b for performing a process of receiving distribution of song data and a search process, and a storage unit 51 c for storing the song data and the like. Have.
Similarly, the other karaoke store 102 is also provided with a karaoke store side LAN 82, which is provided with a karaoke device and an electronic table of contents terminal. These karaoke apparatuses and electronic contents terminals are installed in each of the karaoke rooms R21, R22,..., R2n. The electronic table of contents server 52 and the router 42 are installed in an office or the like separate from the karaoke room.
[0016]
Here, the LANs 81 and 82 of each karaoke store use the same 192.168.1.0/24 (the netmask or the address prefix is 255.255.255.0 and the IP address 192) as the first network address. .168.1.1 to 192.168.1.255).
[0017]
In the karaoke store 101, a local address in the first network address is used between the electronic table of contents server 51 and the electronic table of contents terminals 71 and 72 and between the electronic table of contents terminal 51 and the karaoke apparatuses 61 and 62, respectively. Perform data transmission. Here, the “local address” is not an IP address used directly for routing on the Internet, but an IP address used in a closed network. In this example, the address matches a part of the private address space defined in RFC1918, but is not limited to this.
[0018]
The local address used on the LAN in the karaoke store is hereinafter referred to as a “first local address”. For example, 192.168.1.2 is fixedly assigned to the electronic table of contents server 51 in advance as the first local address. For example, 192.168.1.3 is assigned to the karaoke apparatus 61 as a first local address, and 192, 168.1.4 is assigned to the electronic table of contents terminal 71 as the first local address. . Data transmission is performed between the electronic table of contents server 51 and the karaoke apparatus 61 and between the electronic table of contents server 51 and the electronic table of contents terminal 71 using these first local addresses.
[0019]
Similarly, in the karaoke store 102, data transmission is performed between the electronic table of contents server 52 and the karaoke apparatus and between the electronic table of contents server 52 and the electronic table of contents using these first local addresses.
[0020]
Reference numeral 10 denotes the Internet corresponding to the WAN according to the present invention, and the center-side router 2 and each of the karaoke shop-side routers 41 and 42 are always connected via the Internet 10. Or connect when needed.
Each of the routers 2, 41, and 42 has a VPN function based on IPSec (IP Security Protocol). VPN tunnels 91 and 92 are formed between the center-side router 2 and the karaoke store-side routers 41 and 42 by the VPN functions of the routers 2, 41 and 42 and the VPN service of the ISP (Internet Service Provider). are doing. That is, a virtual private network (VPN) in which data encryption and local address encapsulation are performed between the center-side LAN 3 and the karaoke store-side LANs 81 and 82.
[0021]
In the LAN 81 of the karaoke shop 101, 10.2.20.0/24 (the net mask or the address prefix is 255.255.255.0 and the IP address is 10.22.20) as the second network address for the VPN for the VPN. .1 to 10.2.2.255).
[0022]
In the LAN 82 of the karaoke store 102, 10.2.21.0/24 (the netmask or the address prefix is 255.255.255.0, and the IP address is 10.2.21) as the second network address for the VPN. .1 to 10.2.2.255).
[0023]
As described above, the second network address for the VPN is different for each karaoke shop. That is, the local address (hereinafter, referred to as “second local address”) in the second network address of the router 41 of the karaoke store 101 is 10.2.20.1, and the second address of the router 42 of the karaoke store 102 is A different second local address for each karaoke shop, such as a local address of 10.2.21.1, is set in each router. In this example, the lower 8 bits are fixed to 00000001, and different second local addresses are set in advance when the router is shipped from the factory so that the upper 24 bits do not overlap. Thus, a different second network address is used for each karaoke store by the VPN function of the router.
[0024]
The local address of the router 2 on the center 100 side is fixed at 10.2.30.1. The network address of the center 100 is 10.2.30.0/24.
[0025]
The diagram shown on the right side in FIG. 1 shows encapsulation by VPN. Here, the local address 10.2.30.2 of the distribution server 11 is set as “a”, the second local address 10.2.20.3 of the karaoke apparatus 61 is set as “b”, and the router 2 is set as the source IP address. The added global IP address 200.100.10.1 is represented by “A”, and the global IP address 200.100.20. 1 assigned to the router 41 of the karaoke store 101 is represented by “B”. When data is transmitted from the distribution server 11 of the center 100 to the karaoke apparatus 61, as shown on the right side of the figure, the data has "a" as the source IP address and "b" as the destination IP address. The IP packet becomes an IP packet. The IP packet is encrypted by the function of the VPN, and the global IP address “A” is assigned as the source address and the global IP address “B” is assigned as the destination address, that is, the encapsulated IP. The packet is transmitted. The router 41 restores this encapsulation, decrypts the encrypted IP packet, returns it to the original IP packet, and sends it to the destination karaoke apparatus 61. In this way, by using the function of the VPN, the distribution server 11 can perform data transmission assuming that the local address “b” is virtually in the private network.
As described above, since the communication contents pass through the virtual occupation tunnel by the encryption and the encapsulation, the risk of being intercepted by a third party is extremely low.
[0026]
FIG. 2 is a list of the above-mentioned addresses used in this network system. By making the first network address in each karaoke store the same, a local address can be fixedly assigned in advance to the electronic table of contents servers 51 and 52 installed in each karaoke store. Can be set in advance for network connection to the electronic table of contents terminals 71, 72,. On the other hand, the second network address for the VPN of each karaoke store is set to a different value for each karaoke store, so that communication with the center 100 via the virtual private networks independent of each other is possible. It becomes.
[0027]
FIG. 3 shows communication between applications on a protocol stack between the devices shown in FIG. The distribution server includes an FTP server application A10 as a distribution application. Correspondingly, the karaoke apparatus is provided with an FTP client application A12 as an application for receiving music data distribution from the distribution server. The electronic table of contents server includes an electronic table of contents server application A21 for responding to a search request from the electronic table of contents terminal. Correspondingly, the electronic table of contents terminal has a client application A30 for instructing a search request to the electronic table of contents server. Further, the karaoke apparatus includes a client application A11 for receiving an instruction of the karaoke music data to be reproduced from the electronic table of contents server. The electronic table of contents server includes an FTP client application A22 for receiving distribution of karaoke tune data (data of an electronic table of contents book) from the distribution server.
[0028]
Here, communication C1 relating to the electronic table of contents is performed using the first local address. Communication C2 related to distribution is performed using the second local address. The switching of the IP address is performed by a network address (socket) combining the IP address and a port number which is a sub address thereof. In other words, the first and second local addresses are used for each application by performing the communication via the virtual interface (socket) for handling the TCP / IP by the application software for communication. This socket is located between the application layer and the TCP protocol layer.
[0029]
FIG. 4 shows a display example of the electronic table of contents terminals 71 and 72 and the like. This electronic table of contents terminal has a touch panel as a user interface. When the electronic table of contents terminal is in a use state, an input mode by a touch panel operation and a humming input mode can be switched. Display the guidance "Please hum melodies." After that, the humming voice signal of the user is converted into a digital data string, and is compressed or transmitted to the electronic table of contents server 51 without compression. This is a music data search instruction to the electronic table of contents server. The electronic table-of-contents server searches for the tunes corresponding to the humming and, as shown in (B), displays the list in order from the one with the highest probability. If there is a desired song in the user, the user specifies the song by touching the number. Thereby, the electronic table of contents terminal gives the selection result to the electronic table of contents server. The electronic table of contents server instructs the corresponding karaoke apparatus as the music to be reproduced corresponding to the music data. In response, the karaoke device plays the corresponding music.
[0030]
FIG. 5 is a diagram illustrating a communication procedure of the distribution server, the karaoke apparatus, the electronic table of contents server, and the electronic table of contents terminal. As shown in this figure, the distribution server periodically distributes music data to the karaoke apparatus and the electronic contents server. Thereby, the karaoke apparatus accumulates the music data, and the electronic table of contents server accumulates the music data. As described above, when a search instruction is given from the electronic table of contents terminal to the electronic table of contents server by touch panel operation or humming input, the electronic table of contents server returns the search result to the electronic table of contents terminal. Thereafter, when the selection result of the electronic table of contents terminal is returned to the electronic table of contents server, the electronic table of contents server instructs the corresponding karaoke apparatus of the corresponding music piece data. As a result, the karaoke apparatus reproduces the corresponding music.
[0031]
In the above-described example, the global IP addresses of the routers 41 and 42 of each karaoke shop are dynamically assigned by the ISP, but these global IP addresses may be fixed.
[0032]
In the above-described example, the second local address of each karaoke apparatus is fixed. However, the router uses the DHCP (Dynamic Host Configuration Protocol) function of the karaoke shop side, and the router uses the DHCP (Dynamic Host Configuration Protocol) function within the second network address. The second local address may be allocated.
[0033]
Further, in the above-described example, an FTP server is set up on the distribution server side and music data is downloaded by the FTP client application of each karaoke apparatus. Conversely, an FTP server is set up on the karaoke apparatus side and the distribution of the center is performed. The distribution of the karaoke music data may be received from the server.
[0034]
Also, in the above-described example, the result of the selection of the music by the electronic table of contents is returned to the electronic table of contents, and the electronic table of contents instructs the music data to the karaoke apparatus. An instruction may be given to the device.
[0035]
【The invention's effect】
According to the present invention, the local address in the VPN of the router installed at the branch office is fixed, so that a special setting operation of the network by the operator at the branch office becomes unnecessary, and the construction of the VPN between the center and the branch office becomes unnecessary. Becomes easier. In addition, since the local address of the server on the branch office is fixed, even when the server on the branch office is provided, a special setting operation of the network by the operator on the branch office is not required, and the server on the branch office is connected to the branch server via the LAN in the branch office. Data can be easily transmitted to and from each client.
[0036]
[Brief description of the drawings]
FIG. 1 is a block diagram showing the configuration of a karaoke communication system to which the present invention is applied. FIG. 2 is a list of addresses used in the network system. FIG. 3 is a diagram showing a protocol stack between devices in the network system. FIG. 4 is a diagram showing a display example of an electronic table of contents terminal. FIG. 5 is a diagram showing a communication procedure of a distribution server, a karaoke apparatus, an electronic table of contents server, and an electronic table of contents terminal.
11, 12-distribution server (center-side server), 2-center-side router, 3-center-side LAN, 41, 42-karaoke shop-side router (branch-side router), 51,52-electronic table of contents server (branch-side server) , 61, 62-Karaoke device (client), 71, 72-Electronic table of contents terminal, 81, 82-Karaoke store side LAN (branch side LAN), 91, 92-VPN tunnel, 10-Internet (WAN), 100-Center , 101, 102-Karaoke store (branch), R11, R12 ...-Karaoke room, 11a, 51a, 61a-Communication means, 11b, 51b, 61b-Control means, 11c, 51c, 61c-Storage means

Claims (3)

  1. A branch-side server disposed on the branch office LAN; a plurality of clients disposed on the branch office LAN for transmitting data to and from the branch-side server; and a plurality of clients provided between the LAN and the WAN. A plurality of branch office networks each having a branch office router performing routing between the LAN and the WAN;
    A center-side network provided with a center-side server arranged in a LAN in the center, and a center-side router provided between the LAN in the center and the WAN and performing routing between the LAN and the WAN; A network system comprising:
    The branch server and the client have means for performing data transmission between the branch server and the client using an IP address within the first network address assigned to the branch server,
    The center router and the branch office router use the IP address in the second network address different for each branch office router to encrypt data and encapsulate the IP address between the center LAN and the branch office LAN. Network system comprising means for performing data transmission via a virtual network.
  2. The center-side server includes means for distributing karaoke music data to the client, and the client reproduces music based on music data corresponding to a reproduction instruction among music data accumulated by the distribution. 2. The network system according to claim 1, comprising means.
  3. The center-side server includes means for distributing karaoke song data to the branch server, and the branch server searches for the corresponding karaoke song data in response to a search request from the client, 3. The network system according to claim 1, further comprising: means for outputting to the network.
JP2002267211A 2002-09-12 2002-09-12 Network system Pending JP2004104699A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8265084B2 (en) 2005-01-13 2012-09-11 Nec Corporation Local network connecting system local network connecting method and mobile terminal
JP2014072579A (en) * 2012-09-27 2014-04-21 Brother Ind Ltd Wireless lan network system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8265084B2 (en) 2005-01-13 2012-09-11 Nec Corporation Local network connecting system local network connecting method and mobile terminal
JP2014072579A (en) * 2012-09-27 2014-04-21 Brother Ind Ltd Wireless lan network system

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