COMMUNICATION SYSTEM

WIPO Patent Application WO/2022/149385

A1

[Problem] To perform full-duplex communication (full-duplex transmission) for a group call smoothly. [Solution] A communication system of an embodiment broadcasts voice data of each utterance of a user to a mobile communication terminal carried by each of a plurality of users. The mobile communication terminal, when an utterance button is pressed during a group call communication mode in which a reception channel for utterance voice data transmitted from a server is established, establishes, separately from the reception channel being established, a transmission channel for transmitting utterance voice data to the server, and performs transmission of own utterance voice data and reception of utterance voice data in the group bi-directionally and simultaneously. At this time, a simultaneous connection limit number for full-duplex communication and a full-duplex call log including users being simultaneously connected and a simultaneous connection user number are stored, and limited full-duplex communication control is performed in which, on the basis of the full-duplex call log and a simultaneous connection upper-limit number, establishment of a transmission channel on each terminal end for the server is not permitted.

KAKEMURA ATSUSHI (JP)

PCT/JP2021/044616

July 14, 2022

December 06, 2021

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TOSHIBA KK (JP)
TOSHIBA DIGITAL SOLUTIONS CORP (JP)

H04M3/56; H04M1/72

JP2006033430A	2006-02-02
JP2005184852A	2005-07-07
JP2006324832A	2006-11-30
JP2008227592A	2008-09-25
JP2021082953A	2021-05-27

MIZUNO, Katsufumi et al. (JP)

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