TDMA messaging service microcell
First Claim
1. A method of receiving a message on a digital control channel for use in a cellular messaging network, comprising the following steps:
- (A) receiving voice channel assignment signals related to the assignment of voice channels and short messaging signals based on the message from the digital control channel;
(B) distinguishing between the voice channel assignment signals and the short messaging signals; and
(C) discarding the voice channel assignment signals.
2 Assignments
0 Petitions
Accused Products
Abstract
A cellular messaging network includes a switching controller connected to the wireless telephone network. One or more base station micro/picocell retransmitters are coupled to the switching controller. The base station micro/picocell transmitter uses simplified control equipment having no digital traffic channel capability. Each base station micro/picocell retransmitter is able to discriminate between voice channel assignment signals and short messaging signals in the digital control channel, discard the voice channel assignment signals, and rebroadcast the short messaging signals in the digital control channel. One or more receivers are coupled to the base station micro/picocell retransmitters by way of an IS-136 protocol digital control channel. The base station micro/picocell retransmitter can be connected to the switching controller through a twisted-pair telephone line.
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Citations
32 Claims
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1. A method of receiving a message on a digital control channel for use in a cellular messaging network, comprising the following steps:
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(A) receiving voice channel assignment signals related to the assignment of voice channels and short messaging signals based on the message from the digital control channel;
(B) distinguishing between the voice channel assignment signals and the short messaging signals; and
(C) discarding the voice channel assignment signals. - View Dependent Claims (2, 3, 4)
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5. A base station retransmitter for use with a digital control channel, comprising:
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means for connecting to a switching controller and receiving a modulated carrier signal from the switching controller;
an internal circuit coupled for receiving the modulated carrier signal, the internal circuit comprising;
means for demodulating the modulated carrier signal to generate a multiplexed digital signal, means for demultiplexing the multiplexed digital signal to generate voice channel assignment signals and short messaging signals, and means for discarding the voice channel assignment signals. - View Dependent Claims (6, 7, 8, 9)
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10-17. -17. (canceled)
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18. A portable transceiver, comprising:
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a receiver configured to receive a multiplexed digital signal including a voice channel assignment subchannel for voice channel assignment signals and a short messaging subchannel for short messaging signals;
a demultiplexer configured to demultiplex the multiplexed digital signal to generate a short messaging signal and a voice channel assignment signal;
a screening circuit configured to screen the voice channel assignment signal from further processing; and
a decoder that decodes the short messaging signal to obtain a message. - View Dependent Claims (19, 20, 21, 22)
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23. A retransmitter for a wireless network, comprising:
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a connection configured to receive a modulated carrier signal;
a demodulator configured to demodulate the modulated carrier signal to generate a time-division multiplexed digital signal;
a demultiplexer configured to demultiplex the time-division multiplexed digital signal to generate a short messaging signal and a voice channel assignment signal; and
a screening circuit configured to screen the voice channel assignment signal from further processing. - View Dependent Claims (24, 25, 26, 27)
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28. A portable transceiver, comprising:
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a receiver configured to receive a multiplexed digital signal including voice channel assignment signals and short messaging signals; and
a circuit configured to distinguish voice channel assignment signals from short messaging information in the multiplexed digital signal and discard signal portions associated with the voice channel assignment signals. - View Dependent Claims (29, 30, 31, 32)
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Specification