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    • 1. 发明申请
    • MULTICAST PUSH TO TALK GROUPS, APPARATUS, AND METHODS
    • MULTICAST PUSH TO TALK GROUPS,APPARATUS和METHODS
    • US20080247373A1
    • 2008-10-09
    • US11696428
    • 2007-04-04
    • Per SYNNERGRENJan HOLM
    • Per SYNNERGRENJan HOLM
    • H04Q7/28
    • H04W4/10H04L12/185H04L12/189H04L65/4061H04L65/4076H04W4/12H04W76/45
    • A terminal (such as that belonging to or carried by an emergency first responder, for example) participates in a push to talk multicast group in either of two modes or levels. In a first mode or first level of participation, the terminal can join a multicast address for the push to talk multicast group as a passive recipient of transmissions and can thereby listen to the multicast address. In a second mode or second level of participation, the terminal becomes an active participant in the push to talk session. As an active participant in the push to talk session, the terminal can, e.g., receive sender identification (e.g., identification of other participants who may be talking in the push to talk multicast group) and send media bursts to the multicast group.
    • 例如,终端(例如属于紧急第一应答者的终端)以两种模式或级别中的任一种参与一键通组播组。 在第一模式或第一级参与中,终端可以加入多播地址以用于一键通多播组作为传输的被动接收者,从而可以收听多播地址。 在第二种模式或第二级参与中,终端成为即按即说会话的积极参与者。 作为一键通话会话的主动参与者,终端可以例如接收发送方标识(例如,可能在一键通多播组中进行通话的其他参与者的识别),并向多播组发送媒体突发。