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Patent Searching and Data


Title:
METHOD AND APPARATUS FOR A TALKGROUP CALL IN A WIRELESS COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO2001073985
Kind Code:
A3
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 outbond 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.

Inventors:
PAN SHAOWEI
LEI PETER
XIE QIAOBING
ZHANG JINZHONG
ESCUE MARILYN R
WHITNEY STEVE
Application Number:
US0105211W
Publication Date:
December 20, 2001
Filing Date:
February 16, 2001
Export Citation:
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Assignee:
MOTOROLA INC.
International Classes:
H04J4/00; H04J13/04; H04W4/10; (IPC1-7): H04L12/16; H04Q11/00
Foreign References:
US5914958A1999-06-22
US6005848A1999-12-21
Other References:
See also references of EP 1188271A4
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