NETWORK MUTE FEATURE IN WIRELESS TELECOMMUNICATIONS SYSTEMS

    公开(公告)号:CA2279033C

    公开(公告)日:2003-03-25

    申请号:CA2279033

    申请日:1999-07-29

    Abstract: A network mute feature deployed in a wireless telecommunications system allows a mobile user to eliminate ambient environmental and wireless transmission noise. Upon activation of the network mute feature, a voice path interconnecting the mobile unit to a party served by the public switched telephone network (PSTN ) is opened. A portion of the open voice path is subsequently interconnected to a noise generator so that the PSTN party hears unobtrusive background noise indicati ng that the mobile user is still "on the line" and can hear transmissions by the party. The PSTN party, however, cannot hear noises associated with mobile user's environment or wireless transmission while the network mute feature is activated. Advantageously, the network mute feature enhances the ability of mobile users to participate in calls in which the quality of transmission (e.g., a conference call) is important.

    Method and apparatus for performing a voice dispatch call in a digital communication system

    公开(公告)号:AU5781501A

    公开(公告)日:2002-02-21

    申请号:AU5781501

    申请日:2001-08-06

    Abstract: The present invention provides a method and apparatus for performing a voice dispatch call in a digital communication system, such as a spread spectrum communication system. A dispatch group that includes a plurality of communication units is established at a dispatch server. A virtual connection is established for each mobile unit that is active. A dispatch call is initiated when an originating mobile unit sends a dispatch request that is received at the dispatch server. A radio channel is established with each of the active mobile units in the dispatch group. The originating mobile unit then sends voice data that is received by the dispatch server. The voice data can be buffered at the originating mobile unit or the dispatch server. The dispatch server then distributes a portion of the voice data to the active mobile units in the dispatch group utilizing the radio channel.

    METHOD AND APPARATUS FOR PERFORMING A VOICE DISPATCH CALL INA DIGITAL COMMUNICATION SYSTEM

    公开(公告)号:CA2351054A1

    公开(公告)日:2002-02-15

    申请号:CA2351054

    申请日:2001-06-19

    Abstract: The present invention provides a method and apparatus for performing a voice dispatch call in a digital communication system, such as a spread spectrum communication system. A dispatch group that includes a plurality of communication units is established at a dispatch server. A virtual connection is established for each mobile unit that is active. A dispatch call is initiated when an originating mobile unit sends a dispatch request that is received at the dispatch server. A radio channel is established with each of the active mobile units in the dispatch group. The originating mobile unit then sends voice data that is received by the dispatch server. The voice data can be buffered at the originating mobile unit or the dispatch server. The dispatch server then distributes a portion of the voice data to the active mobile units in the dispatch group utilizing the radio channel.

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