Patent ID: 9609491
Date: 2017-03-28
CPC Classifications: H04L,H04M,H04W

Claim:
1. A server apparatus that controls a communication terminal, the apparatus comprising: a receiver; and a transmitter, wherein a plurality of communication terminals forming a group are capable of performing a push-to-talk group communication through the server apparatus, in reception of a call setting request from a first communication terminal included in the group by the receiver, when the group includes a second communication terminal to which call setting fails, the transmitter transmits, to a communication terminal included in the group, an instruction to execute a discovery processing of discovering a communication partner terminal capable of performing a direct communication with the communication terminal without passing through the server apparatus, and when a result of the discovery processing reveals that a third communication terminal that has received the instruction from the server apparatus is capable of performing the direct communication with the second communication terminal, call setting between the server apparatus and the second communication terminal is performed through the third communication terminal.