Low power subscriber unit transmitting voice messages in a two-way communication system
First Claim
1. A method for communicating in a two-way communication system using an interactive data appliance (IDA), wherein said two-way communication system employs at least one central transmitting station (CTS) and at least one local remote receiver that relays messages from said IDA to said CTS, comprising the steps of:
- receiving, with an IDA, synchronized signals from a CTS, said synchronized signals being synchronized to a precision clock source;
speaking a voice message into a receiver of said IDA, andtransmitting said voice message from said IDA to a remote receiver at a maximum power level in a milliwatt range.
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Accused Products
Abstract
An interactive data appliance (IDA) having a receiver and transmitter for sending voice packet messages in a two-way interactive broadcast data service communication system. The IDA contains a receiver into which a user recites a spoken message. The voice message is then transmitted by the IDA to a local remote receiver and then to a central transmitting station. In one embodiment of the invention, the IDA digitizes the voice message recited by the user. Additionally, in one embodiment, the IDA operates on a carrier frequency band in the order of approximately 218 MHz, is a battery operated portable unit, and has a maximum power output in the milliwatt range.
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Citations
28 Claims
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1. A method for communicating in a two-way communication system using an interactive data appliance (IDA), wherein said two-way communication system employs at least one central transmitting station (CTS) and at least one local remote receiver that relays messages from said IDA to said CTS, comprising the steps of:
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receiving, with an IDA, synchronized signals from a CTS, said synchronized signals being synchronized to a precision clock source; speaking a voice message into a receiver of said IDA, and transmitting said voice message from said IDA to a remote receiver at a maximum power level in a milliwatt range. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An interactive data appliance (IDA) adapted for use in a two-way communication system employing at least one central transmitting station (CTS) and at least one local remote receiver that relays messages from said IDA to said CTS, said at least one IDA comprising:
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a receiver receiving synchronized signals from a CTS, said synchronized signals being synchronized to a precision clock source; means for receiving voice messages from a user of said at least one IDA, and a transmitter for transmitting said voice messages from said at least one IDA to a remote receiver, wherein said transmitter has a maximum power output in a milliwatt range. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A two-way communication system comprising:
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at least one low power mobile interactive data appliance (IDA) located in at least one of a plurality of geographic zones of at least one geographic area, said at least one IDA further including; means for receiving voice messages from a user of said at least one IDA, and means from transmitting said voice messages from said at least one IDA, a remote receive only station disposed within said at least one of said plurality of geographic zones for reception of transmissions including said voice messages from said at least one IDA located in said at least one of said plurality of geographic zones, a central transmitting station (CTS) disposed within said at least one geographic area, said CTS communicatively coupled to said receive only station disposed within said at least one of said plurality of geographic zones, said CTS having data processing and transmission facilities for transmitting to said at least one IDA and for receiving from said receive only station multiplexed synchronously related digital data messages of variable lengths, said data processing and transmission facilities including means for synchronizing said transmission facilities with a precision clock signal derived from an independent precision clock source, and facilities in said CTS and said at least one IDA for handing off communications between said plurality of geographic zones when communicated signals deteriorate below a given threshold. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification