Multiplex communications – Special services – Conferencing
Reexamination Certificate
2005-09-13
2005-09-13
Hsu, Alpus H. (Department: 2665)
Multiplex communications
Special services
Conferencing
C370S269000, C370S335000, C370S342000, C340S007460, C340S010320, C379S204010, C455S518000, C455S416000
Reexamination Certificate
active
06944137
ABSTRACT:
In a wireless code-division multiple access (CDMA) system (100), a talkgroup (101) of subscriber units is provided. A sub-talkgroup (102) of subscriber units, forming a part of the talkgroup is assigned at least one inbound channel (416-417). The talkgroup is assigned outbound channels (415). Members of the sub-talkgroup may simultaneously transmit voice information (410-411) using the at least one inbound channel, which voice information is summed (412) and re-transmitted to the talkgroup using the outbound channels. Voice information is summed so that an individual talker receives summed voice information without the individual subscriber's voice content. Subscriber units in the sub-listengroup are allowed to transmit voice information only after requesting, and receiving, an additional inbound channel.
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Escue Marilyn R.
Lei Peter
Pan Shaowei
Whitney Steve
Xie Qiaobing
Haas Kenneth A.
Hsu Alpus H.
May Steven A.
Motorola Inc.
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