Group communication system, group id number issuing apparatus, and call control apparatus

Abstract

There is provided a group communication system allowing group communication to be performed by a simple operation as well as a group ID number issuing apparatus and a call control apparatus to be applied to such a group communication system. When a user takes a group organization procedure to the group communication system, a group representative telephone number representing the group is issued. After the group representative telephone number is issued, the group representative telephone number can be used in the same manner as for calling a subscriber to call a group member to perform group communication. The group communication can be performed by limiting to a lower level subgroup, a pair of the group representative telephone number and an identifier can be used instead of the subscriber's telephone number to determine the calling partner to make a call.

Description

technical field [0001] The present invention relates to a group communication system, a group identification number issuing device, and a call control device for providing a service of so-called group communication in which terminal devices communicate with each other to a plurality of subscribers belonging to a predetermined group. Background technique [0002] The development of IP Multimedia Subsystem (IP Multimedia Subsystem, IMS), which is a solution for communication services carried out in existing fixed telephones, mobile communications and broadcasting, etc., using IP (Internet Protocol, Internet Protocol) network has been remarkable recently (for example, , refer to the following non-patent literature 1). With this IMS, it is possible to implement flexible call control on an IP network regarding voice calls and video calls. [0003] And on the other hand, in order to construct an optimal communication path for carrying out group communication in which multiple peo...

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Problems solved by technology

[0018] In the above-mentioned group communication via the MCU, etc., the sender calls after specifying the phone numbers of all group members. However, in the case of group communication for the same member in the future, it is necessary to call from the beginning again as before. The operation of specifying a phone number, etc., lacks convenience

[0019] As a method to improve this point, it is conceivable to send from the group phone book registered by any member in advance, but in this case, after temporarily accessing the server that provides the service, and then sending time

[0020] In addition, in the proposals described in each of the above-mentioned patent documents, while allowing the formation of a group that matches the desired intention of a subscriber (user) who desires group communication, the system side issues a representative number for the group, and performs After this release, it is not possible to provide users with the convenience of being able to perform group communication using the issued representative number by substantially the same operation as in the case of talking with an individual counterpart (joiner).

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