JP2002026987A - Mobile terminal multicast service system and its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide conversation and multicast communication by mobile phones by a plurality of people. SOLUTION: A mobile phone company 200 manages a multicast request telephone number: 1000 and gives it to a mobile terminal user. The mobile terminal user dials the multicast request telephone number: 1000 in order to receive the multicast service. The mobile phone company 200 uses a multicast group address: 2000 corresponding to the multicast request telephone number: 1000, builds up a multicast communication path 800 on the Internet 100 by using a multicast routing protocol to set up a multicast call between the mobile terminal users. Thus, the mobile terminal users can realize 2-way multicast communication. In addition to two-way speech by a plurality of people, participants of the multicast group can make 2-way communication of character information and video information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system and a method for providing a two-way conversation service by a plurality of portable terminals and a multicast service to the portable terminals.

[0002]

2. Description of the Related Art At present, mobile phones have become widespread and used by many people. In addition, a variety of mobile phone services have been provided, and character information and image data can be transmitted and received. In addition, the transfer speed has increased with the technical advance of mobile phones, and music distribution and data distribution using mobile tools have become possible.

[0003]

However, such a conventional portable telephone service has the following problems. Calls on mobile phones are limited to one-to-one calls. Since there is no concept of a group in information distribution of a mobile phone, a service cannot be provided to a specific user. Since multicast communication has not been realized in the use of mobile phones, network traffic increases in an information distribution service to a plurality of people.

[0004] An object of the present invention is to solve the above-mentioned conventional problems and to provide a two-way conversation service by a plurality of portable terminals and a multicast service to the portable terminals by introducing a multicast service to a portable telephone service. Is to do.

[0005]

SUMMARY OF THE INVENTION A portable terminal multicast service system according to the present invention comprises: an Internet; each portable terminal owned by each of a plurality of portable terminal users;
An exchange accommodating the portable terminal, an interface with the exchange, and voice and IP (Internet Protocol)
A gateway that converts between packets and interfaces with the Internet, a gatekeeper that connects to the Internet and converts a given telephone number and an IP address of a connection destination, and a gatekeeper that connects to the Internet and connects to the mobile terminal. A multicast management server for managing a multicast service, and a bidirectional communication connection between the plurality of mobile terminals on the Internet by a TCP / IP multicast routing protocol under the control of a mobile phone carrier. It has a bidirectional communication path establishing means for establishing a communication path, and a multicast means for multicasting character information, audio information, and video information from one portable terminal to the plurality of portable terminals.

A portable terminal multicast service system according to the present invention interfaces the Internet, each portable terminal owned by each of a plurality of portable terminal users, an exchange accommodating the portable terminal, and an interface with the exchange. A gateway that converts between voice and IP (Internet Protocol) packets and interfaces with the Internet, a gatekeeper that connects to the Internet and converts a given telephone number and a connected IP address, A multicast management server that connects to the mobile terminal and manages a multicast service for the mobile terminal. The multicast is a multicast request telephone number and a class D IP address that the mobile terminal user dials to request a multicast. Correspondence table registration means for registering a multicast group address correspondence table indicating correspondence with a group address; the multicast group address; and a sender IP address of the portable terminal which transmits data to the multicast group address and belongs to the same group. Mapping table registration means for registering a group address mapping table indicating the correspondence of the above, multicast request means for the mobile terminal to request multicast by the multicast request telephone number, and multicast for receiving the multicast request telephone number from the mobile terminal Request receiving means, receives the multicast request telephone number, refers to the correspondence table and the mapping table, and sets the multicast group address and the same group Address obtaining means for obtaining the sender IP addresses of the plurality of mobile terminals, and a multicast routing protocol on the Internet based on the obtained multicast group address and the plurality of sender IP addresses. Bidirectional communication path establishing means for establishing a multicast bidirectional communication path for performing bidirectional multicast connection between terminals.

Further, the mobile terminal multicast service system according to the present invention is characterized in that the mobile phone operator assigns a multicast group address to a multicast request phone number by a first allocating means;
Second assigning means for assigning the multicast group address to a plurality of sender IP addresses belonging to the same group, wherein the correspondence table registering means registers the assigned multicast group address for each multicast request telephone number The mapping table registration means registers a plurality of sender IP addresses belonging to the same group for each assigned multicast group address.

[0008] Further, the portable terminal multicast service system of the present invention comprises: an Internet; a video distribution server connected to the Internet for distributing video; each portable terminal owned by each of a plurality of portable terminal users; An exchange accommodating a mobile terminal, an interface with the exchange, for converting between voice and IP (Internet Protocol) packets, and a gateway for interfacing with the Internet, and a connection with the Internet and connection with a given telephone number A gatekeeper for converting the IP address and a multicast management server connected to the Internet and managing a multicast service for the mobile terminal, wherein the mobile terminal user dials in order to request a multicast. Correspondence table registration means for registering a multicast group address correspondence table indicating a correspondence between a request telephone number and a multicast group address which is a class D IP address, and transmitting the multicast group address and data to the multicast group address. Mapping table registration means for registering a group address mapping table indicating correspondence with the IP address of the video distribution server; multicast request means for requesting the mobile terminal to perform multicasting by the multicast request telephone number; A multicast request receiving means for receiving a multicast request telephone number; and a multicast key receiving means for receiving the multicast request telephone number and referring to the correspondence table and the mapping table. A strike group address, the address obtaining means for obtaining an IP address of the video distribution server, based on the multicast group address was determined to IP address of the video distribution server, the multicast routing protocol,
A multicast communication path establishing means for establishing a multicast communication path for multicast-connecting the plurality of mobile terminals on the Internet.

[0009] Further, the portable terminal multicast service method of the present invention provides an interface between the Internet, each portable terminal owned by each of a plurality of portable terminal users, an exchange accommodating the portable terminal, and the exchange.
A gateway that converts between voice and IP (Internet Protocol) packets and interfaces with the Internet, a gatekeeper that connects to the Internet and converts a given telephone number and a connected IP address, connection,
A multicast management server for managing a multicast service for the mobile terminal, comprising: a multicast management server that manages the multicast service for the mobile terminal; A two-way communication path establishing step of establishing a two-way communication path for two-way communication connection between mobile terminals, and multicasting text information, audio information, and video information from one mobile terminal to the plurality of mobile terminals And a multicast step.

[0010] Also, the portable terminal multicast service method of the present invention provides an interface between the Internet, each portable terminal owned by each of a plurality of portable terminal users, an exchange accommodating the portable terminal, and the exchange. A gateway that converts between voice and IP (Internet Protocol) packets and interfaces with the Internet;
A mobile terminal multicast service method, comprising: a gatekeeper that converts a given telephone number and an IP address of a connection destination; and a multicast management server that connects to the Internet and manages a multicast service for the mobile terminal. A correspondence table registration step of registering a multicast group address correspondence table indicating a correspondence between a multicast request telephone number dialed by a terminal user to request multicast and a multicast group address which is a class D IP address; And a sender I of the portable terminal belonging to the same group, transmitting data to the multicast group address.
A mapping table registration step of registering a group address mapping table indicating a correspondence with a P address; a multicast request step in which the portable terminal requests multicast by the multicast request telephone number; and a multicast request telephone number from the portable terminal. Receiving a multicast request to be received;
An address obtaining step of receiving the multicast request telephone number and referring to the correspondence table and the mapping table to obtain a multicast group address and sender IP addresses of the plurality of mobile terminals belonging to the same group; A bidirectional communication path for establishing a bidirectional multicast communication path for bidirectional multicast connection between the plurality of mobile terminals on the Internet by a multicast routing protocol based on the multicast group address and the plurality of sender IP addresses. Establishing step.

Further, in the mobile terminal multicast service method of the present invention, a first allocation step of allocating a multicast group address to a multicast request telephone number by a mobile telephone operator;
A second assigning step of assigning the multicast group address to a plurality of sender IP addresses belonging to the same group, wherein the correspondence table registration step registers the assigned multicast group address for each multicast request telephone number. 7. The mobile terminal multicast service method according to claim 6, wherein said mapping table registration step registers a plurality of sender IP addresses belonging to the same group for each of said assigned multicast group addresses.

[0012] The mobile terminal multicast service method of the present invention may further comprise: an Internet; a video distribution server connected to the Internet for distributing video; each mobile terminal owned by each of a plurality of mobile terminal users; An exchange accommodating a mobile terminal, an interface with the exchange, for converting between voice and IP (Internet Protocol) packets, and a gateway for interfacing with the Internet, and a connection with the Internet and connection with a given telephone number A mobile terminal multicast service method comprising: a gatekeeper for converting an IP address described above; and a multicast management server connected to the Internet and managing a multicast service for the mobile terminal. Registering a multicast group address correspondence table indicating a correspondence between a multicast request telephone number to be dialed for requesting a multicast group address and a multicast group address which is a class D IP address, the multicast group address, and the multicast group A mapping table registration step of registering a group address mapping table indicating a correspondence with an IP address of the video distribution server that transmits data to an address; and a multicast request step of requesting the mobile terminal to perform a multicast using the multicast request telephone number. Receiving the multicast request telephone number from the portable terminal, a multicast request receiving step, receiving the multicast request telephone number, An address obtaining step for obtaining a multicast group address and an IP address of the video distribution server by referring to the mapping table and the mapping table; and performing multicast routing based on the obtained multicast group address and the IP address of the video distribution server. Establishing a multicast communication path for multicast-connecting the plurality of portable terminals on the Internet by a protocol.

Further, according to the portable terminal multicast service method of the present invention, the portable telephone operator can use the Internet via the Internet in response to a request from the portable terminal user.
And a notifying step of notifying the portable terminal of the portable terminal user of the multicast request telephone number.

[0014]

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

FIG. 1 is a configuration block diagram of the first embodiment. FIG. 5 is a multicast group address correspondence table, and FIG. 6 is a group address mapping table.

Referring to FIG. 1, a first embodiment of the present invention comprises an Internet 100, portable terminals 10, 11, and 12, including a portable telephone terminal and a portable video telephone terminal, owned by a portable terminal user. 10, 11, which accommodates mobile terminals
12 exchanges 600, 601, 602, interface with exchanges, voice and IP (Internet Protocol)
Converts between packets,
0, gateways 300, 301,
302, a gatekeeper 400 connected to the Internet 100, and a multicast management server 500 connected to the Internet 100, and a plurality of mobile terminals 10, 11 under the control of the mobile phone operator 200. , 12 and provides a two-way conversation service and a two-way television conversation service, and performs multicasting of text information, audio information, and video information from one portable terminal 10 to a plurality of portable terminals 11, 12.

The gate keeper 400 stores a multicast group address correspondence table 402 indicating the correspondence between the multicast request telephone number and the multicast group address as shown in FIG.

The multicast request telephone number is a telephone number that the portable terminal user dials to request a multicast. This multicast request phone number is
This is a telephone number for identifying each of the groups to which the mobile terminal or the video distribution server that transmits the data for multicast belongs. For example, in FIG.
0, 11, and 12 form one group, and the mobile terminal 10
The multicast request telephone number to be dialed when each of,, and becomes a sender and requests a multicast is 1000.

The multicast group address is TC
P / IP IGMP (Internet Group)
Multicast Protocol)
This is an IP address called class D used for performing multicast communication.

The gate keeper 400 is configured to obtain a multicast group address corresponding to a multicast request telephone number transmitted from the portable terminal from the multicast group address correspondence table 402 and notify the multicast management server 500 of the multicast group address.

The multicast management server 500 is configured as shown in FIG.
Group address mapping table 50 as shown in FIG.
2 are stored.

Group address mapping table 50
2 transmits a multicast group address and a message addressed to the multicast group address;
9 is a table showing correspondence between senders belonging to the same group and sender IP addresses. For example, according to FIG.
If the multicast group address is 2000, the sender IP addresses belonging to the same group are 3000 and 3
001 and 3002.

The multicast management server 500
Refers to the group address mapping table 502 and sets the sender IP address to the gateway 300, 30.
1, 302.

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

FIG. 2 is a diagram for explaining the operation of the first embodiment.

The operation will be described mainly with reference to FIG. 2 and also with reference to FIG. 5 and FIG.

The mobile phone operator 200 gives the mobile terminal user A the IP address: 3000 and the mobile terminal user B
And the IP address: 3001 to the mobile terminal user C,
IP address: 3002 is assigned in advance.

Before starting the provision of the service, the mobile phone carrier 200 allocates a multicast group address, registers the multicast request telephone number and the multicast group address in the multicast group address correspondence table 402,
The multicast group address and the sender IP address are registered in the group address mapping table 502.

Before receiving the service, the mobile terminal user applies to the mobile phone operator 200 for granting a multicast request telephone number, and the mobile phone operator 200
Notifies the mobile terminal user of the multicast request telephone number.

The mobile terminal user A is the mobile terminal user B,
When a multicast request telephone number: 1000 is input from the mobile terminal 10 as a multicast request in order to realize a multi-person conversation with C, the mobile terminal 10 sends the multicast request telephone number: 1000 to the gateway 300 via the exchange 600. (Step S1).

When the gateway 300 receives the multicast request telephone number: 1000 from the exchange 600,
The gatekeeper 40 sends a multicast group address search request, which is a request for searching a multicast group address for the multicast request telephone number: 1000.
0 (step S2).

When the gate keeper 400 receives the multicast group address search request, the gate keeper 400 searches the multicast group address correspondence table 402 for a multicast group address: 2000 corresponding to the multicast request telephone number: 1000, and obtains a multicast group address: 2000 is notified to the gateway 300 (step S3).

The gateway 300 sends to the multicast management server 500 a sender IP address search request for searching for the sender IP address of the sender sending the message to the notified multicast group address: 2000 (step S4). ).

When the multicast management server 500 receives the sender IP address search request, the multicast management server 500 reads the sender IP address for the multicast group address: 2000 from the group address mapping table 502:
3000, 3001, and 3002 are searched, and the search result is notified to the gateway 300 (step S5).

The gateway 300 constructs a multicast communication path 800 on the Internet 100 by a multicast routing protocol based on the notified sender IP addresses: 3000, 3001, 3002 and the multicast group address: 2000.
Thereby, a multicast call connection is established between the mobile terminals 10, 11 and 12, and the mobile terminal users A, B, and C
Two-way conversation with a mobile phone is enabled, and text information, audio information, and video information can be multicast from one mobile terminal to a plurality of other mobile terminals.

Next, a second embodiment will be described.

FIG. 3 is a block diagram showing the configuration of the second embodiment.

Referring to FIG. 3, in a second embodiment of the present invention, an Internet 100, portable terminals 10, 11, and 12 of portable terminal users, and an exchange 60 accommodating the portable terminals are provided.
0, 601, 602 and gateways 300, 301,
302, a gatekeeper 400, a multicast management server 500, and a video distribution server 700 connected to the Internet 100 for distributing video including live video.
Under the control of the mobile phone operator 200,
A multicast service is provided to a plurality of mobile terminals 10, 11, and 12. In the second embodiment, components other than the video distribution server 700 are the same as the components of the first embodiment. Here, the video distribution server 700
Has an IP address: 4000.

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

FIG. 4 is a diagram for explaining the operation of the second embodiment.

The operation will be described mainly with reference to FIG. 4 and also with reference to FIG. 5 and FIG.

When the mobile terminal users A, B, and C use the mobile terminals 10, 11, and 12 to input a multicast request telephone number: 1001 to use the video distribution service, the mobile terminals 10, 11, and 12 This multicast request telephone number: 1001 is exchanged with the exchanges 600, 601, 60
Then, the data is transmitted to the gateways 300, 301, and 302 via Step 2 (Step S11).

The gateways 300, 301, 302
When receiving the multicast request telephone number: 1001 from the exchanges 600, 601, 602, it sends a multicast group address search request to search for a multicast group address corresponding to the multicast request telephone number: 1001 to the gatekeeper 400 (step S12).

Upon receiving the multicast group address search request, the gate keeper 400 searches the multicast group address correspondence table 402 for a multicast group address: 2001 corresponding to the multicast request telephone number: 1001, and the multicast group address as a search result: 2001 is notified to the gateways 300, 301 and 302 (step S13).

The gateways 300, 301, 302
Notified multicast group address: 2001
A sender IP address search request, which is a request for searching for a sender IP address of a sender sending a message to the multicast management server 500, is sent to the multicast management server 500 (step S1).
4).

Upon receiving the sender IP address search request, the multicast management server 500 uses the group address mapping table 502 to check the sender IP address for the multicast group address 2001:
4000, and the search result is transmitted to the gateway 30.
0, 301 and 302 are notified (step S15).

The gateways 300, 301, 302
Based on the notified sender IP address: 4000 and multicast group address: 2001, multicast communication paths 900, 901 and 902 are constructed on the Internet 100. Thereby, the mobile terminals 10 and 11
And 12 can receive the video distribution service from the video distribution server 700.

The present invention can provide services not only to portable terminals but also to fixed terminals.

[0049]

As described above, according to the present invention, the TCP
/ IP has a group address mapping table that indicates the correspondence between the multicast group address defined by / IP and the IP address of the portable terminal belonging to the same group by transmitting data to the multicast group address. Since it is configured to perform the multicast communication, there is an effect that the portable terminal user can realize a one-to-n two-way communication.

Further, the present invention has a configuration in which a cellular phone user can transmit character information and video information to a plurality of other cellular phone users by multicast group address communication. The character information transmitted to only one mobile phone user can be transmitted to all mobile phone users participating in the multicast group.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a first embodiment.

FIG. 2 is a diagram for explaining the operation of the first embodiment.

FIG. 3 is a configuration block diagram of a second embodiment.

FIG. 4 is a diagram for explaining the operation of the second embodiment.

FIG. 5 is a multicast group address correspondence table.

FIG. 6 is a group address mapping table.

[Explanation of symbols]

 10, 11, 12 Mobile terminal 100 Internet 200 Mobile phone operator 300, 301, 302 Gateway 400 Gatekeeper 500 Multicast management server 600, 601, 602 Exchanger 700 Video distribution server

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (reference) H04M 11/00 302 H04L 11/18 F term (reference) 5K015 AF05 BA00 5K024 AA05 AA71 BB01 CC11 CC14 EE09 FF01 FF05 5K030 GA16 HA08 HB21 HC01 HC09 HD03 HD09 JL01 JL07 KA05 KA06 LA19 LB02 LB13 LD06 5K051 DD01 5K101 KK02 KK05 KK07 LL12 RR05

Claims (9)

[Claims] 1. An Internet, each mobile terminal owned by each of a plurality of mobile terminal users, an exchange accommodating the mobile terminal, an interface with the exchange, and communication between voice and IP (Internet Protocol) packets. Performing a conversion and connecting to the Internet with a gateway for interfacing with the Internet,
A gatekeeper that converts a given telephone number and an IP address of a connection destination; and a multicast management server that connects to the Internet and manages a multicast service for the mobile terminal. / IP multicast routing protocol, a bidirectional communication path establishing means for establishing a bidirectional communication path for bidirectional communication connection between the plurality of mobile terminals on the Internet, and And a multicast means for multicasting text information, audio information, and video information to the portable terminal. 2. The Internet, each mobile terminal owned by each of a plurality of mobile terminal users, an exchange accommodating the mobile terminal, and an interface with the exchange, for transmitting voice and IP (Internet Protocol) packets. Performing a conversion and connecting to the Internet with a gateway for interfacing with the Internet,
A gatekeeper for converting a given telephone number and an IP address of a connection destination; and a multicast management server for connecting to the Internet and managing a multicast service for the mobile terminal, wherein the mobile terminal user requests a multicast. Correspondence table registration means for registering a multicast group address correspondence table indicating a correspondence between a multicast request telephone number to be dialed and a multicast group address which is a class D IP address, and the multicast group address and the multicast group address. Mapping table registration means for transmitting data and registering a group address mapping table indicating a correspondence with a sender IP address of the portable terminal belonging to the same group;
Multicast request means for the mobile terminal to request a multicast by the multicast request telephone number,
A multicast request receiving means for receiving the multicast request telephone number from the portable terminal; receiving the multicast request telephone number and referring to the correspondence table and the mapping table; a multicast group address and the multicast group Address acquisition means for obtaining sender IP addresses of a plurality of mobile terminals; and a multicast routing protocol on the Internet based on the obtained multicast group address and the plurality of sender IP addresses.
A mobile terminal multicast service system comprising: a bidirectional communication path establishing means for establishing a multicast bidirectional communication path for bidirectional multicast connection between the plurality of mobile terminals. 3. A first assigning means for assigning a multicast group address to a multicast request telephone number by a mobile phone operator, and assigning the multicast group address to a plurality of sender IP addresses belonging to the same group by the mobile phone operator. And a correspondence table registration unit for registering the assigned multicast group address for each multicast request telephone number, wherein the mapping table registration unit includes a plurality of senders belonging to the same group. I
The mobile terminal multicast service system according to claim 2, wherein a P address is registered for each assigned multicast group address. 4. An Internet, a video distribution server connected to the Internet to distribute video, each mobile terminal owned by each of a plurality of mobile terminal users, an exchange accommodating the mobile terminal, and the exchange A gateway that interfaces with the Internet and converts between voice and IP (Internet Protocol) packets and interfaces with the Internet; and a gatekeeper that connects to the Internet and converts a given telephone number and a destination IP address. A multicast management server that connects to the Internet and manages a multicast service for the mobile terminal, wherein the mobile terminal user dials in order to request a multicast and a multicast request telephone number and a class D IP address. Correspondence table registration means for registering a multicast group address correspondence table indicating correspondence with a multicast group address; and indicating correspondence between the multicast group address and an IP address of the video distribution server transmitting data to the multicast group address. Mapping table registration means for registering a group address mapping table, multicast request means for requesting the mobile terminal to perform multicasting using the multicast request telephone number, and multicast request receiving means for receiving the multicast request telephone number from the mobile terminal. Receiving the multicast request telephone number, referring to the correspondence table and the mapping table, and setting a multicast group address and an IP address of the video distribution server. And a multicast communication path for multicast-connecting the plurality of portable terminals on the Internet by a multicast routing protocol based on the obtained multicast group address and the IP address of the video distribution server. And a multicast communication path establishing means. 5. An Internet, each portable terminal owned by each of a plurality of portable terminal users, an exchange accommodating the portable terminal, and an interface with the exchange, for transmitting voice and IP (Internet Protocol) packets. Performing a conversion and connecting to the Internet with a gateway for interfacing with the Internet,
A mobile terminal multicast service method comprising: a gatekeeper for converting a given telephone number and an IP address of a connection destination; and a multicast management server for connecting to the Internet and managing a multicast service for the mobile terminal. A bi-directional communication path establishing step of establishing a bi-directional communication path for bi-directional communication connection between the plurality of mobile terminals on the Internet by a TCP / IP multicast routing protocol under management of a business operator; A multicast step of multicasting text information, audio information, and video information from one of the mobile terminals to the plurality of mobile terminals. 6. The Internet, each portable terminal owned by each of a plurality of portable terminal users, an exchange accommodating the portable terminal, and an interface with the exchange, for transmitting voice and IP (Internet Protocol) packets. Performing a conversion and connecting to the Internet with a gateway for interfacing with the Internet,
A mobile terminal multicast service method, comprising: a gatekeeper that converts a given telephone number and an IP address of a connection destination; and a multicast management server that connects to the Internet and manages a multicast service for the mobile terminal. A correspondence table registration step of registering a multicast group address correspondence table indicating a correspondence between a multicast request telephone number dialed by a terminal user to request multicast and a multicast group address which is a class D IP address; And a sender I of the portable terminal belonging to the same group, transmitting data to the multicast group address.
A mapping table registration step of registering a group address mapping table indicating a correspondence with a P address; a multicast request step in which the portable terminal requests multicast by the multicast request telephone number; and a multicast request telephone number from the portable terminal. Receiving a multicast request to be received;
An address obtaining step of receiving the multicast request telephone number and referring to the correspondence table and the mapping table to obtain a multicast group address and sender IP addresses of the plurality of mobile terminals belonging to the same group; A bidirectional communication path for establishing a bidirectional multicast communication path for bidirectional multicast connection between the plurality of mobile terminals on the Internet by a multicast routing protocol based on the multicast group address and the plurality of sender IP addresses. Establishing a mobile terminal multicast service. 7. A first assigning step of assigning a multicast group address to a multicast request telephone number by a mobile phone operator, and assigning the multicast group address to a plurality of sender IP addresses belonging to the same group by the mobile phone operator. Further comprising a second assigning step, wherein the correspondence table registering step registers the assigned multicast group address for each of the multicast request telephone numbers, and the mapping table registering step comprises the steps of: 7. The mobile terminal multicast service method according to claim 6, wherein an IP address is registered for each assigned multicast group address. 8. An Internet, a video distribution server connected to the Internet to distribute video, each mobile terminal owned by each of a plurality of mobile terminal users, an exchange accommodating the mobile terminal, and the exchange A gateway that interfaces with the Internet and converts between voice and IP (Internet Protocol) packets and interfaces with the Internet; and a gatekeeper that connects to the Internet and converts a given telephone number and a destination IP address. And a multicast management server for connecting to the Internet and managing the multicast service for the mobile terminal. A multicast request telephone, wherein the mobile terminal user dials to request a multicast. A correspondence table registration step of registering a multicast group address correspondence table indicating a correspondence between a number and a multicast group address which is a class D IP address; the multicast group address; and the video distribution for transmitting data to the multicast group address. A mapping table registration step of registering a group address mapping table indicating correspondence with an IP address of a server; a multicast request step of requesting the mobile terminal to perform a multicast using the multicast request telephone number; and the multicast request telephone from the mobile terminal. Receiving a multicast request telephone number, and referencing the correspondence table and the mapping table to receive a multicast request. An address obtaining step of obtaining a cast group address and an IP address of the video distribution server; and a multicast routing protocol on the Internet based on the obtained multicast group address and the IP address of the video distribution server. Establishing a multicast communication path for establishing a multicast communication path for multicast connection of the mobile terminal. 9. In response to a request from the user of the mobile terminal, a mobile phone operator sends a request via the Internet.
9. The mobile terminal multicast service method according to claim 5, further comprising a notification step of notifying the mobile terminal user of the mobile terminal of the multicast request telephone number. .