Patent ID: 9226338
Filing Date: 2015-12-29
Classification: H04L,H04W

Abstract:
1. A communication terminal device comprising: first circuitry to communicate with a group communication server, the first circuitry to receive a session initiation protocol (SIP) invite from the group communication server, the SIP invite to request initiation of group communication between a plurality of communication terminal devices; a controller, coupled with the first circuitry, to modify the SIP invite; and second circuitry, coupled with the controller, to provide device-to-device communication, the second circuitry to transmit the modified SIP invite to another communication terminal device of the plurality of communication terminal devices, wherein the controller is to set a first on-hold status of the other communication terminal device to off hold at the communication terminal device and is further to transmit a message, via the first circuitry, to the group communication server to set a second on-hold status of the other communication terminal device to on-hold at the group communication server.