Method and apparatus for compressing and transmitting ultra high speed data
First Claim
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1. A wireless communication unit, the communication unit comprising:
- circuitry configured to;
generate data for transmission to a second communication unit;
encode the data using a codec selected from a plurality of codecs, wherein each of the plurality of codecs is associated with a data rate, and wherein one of the plurality of codecs is an excitation linear prediction codec;
forward error correction (FEC) encode the encoded data according to a selected type of FEC encoding;
modulate the FEC encoded data according to a selected modulation scheme; and
transmit the modulated FEC encoded data to the second communication unit in at least one time slot;
wherein the selected modulation scheme, and the selected type of FEC encoding are based on the selected codec.
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Abstract
Voiceband compression techniques are employed in order to enable an RF telecommunications base station to accommodate data signals of high speed voiceband modems and FAX machines. An Ultra-High Speed Codec supports voiceband modem and FAX transmissions up to 14.4 kb/s and operates using four 16-phase RF slots. Because these codecs transmit information over several RF slots which can be contiguous, the slots within RF communication channels are dynamically allocated. The Dynamic Time slot/Bandwidth Allocation feature detects and monitors the data transmission and forms a data channel from the necessary number of slots.
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Citations
16 Claims
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1. A wireless communication unit, the communication unit comprising:
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circuitry configured to; generate data for transmission to a second communication unit; encode the data using a codec selected from a plurality of codecs, wherein each of the plurality of codecs is associated with a data rate, and wherein one of the plurality of codecs is an excitation linear prediction codec; forward error correction (FEC) encode the encoded data according to a selected type of FEC encoding; modulate the FEC encoded data according to a selected modulation scheme; and transmit the modulated FEC encoded data to the second communication unit in at least one time slot; wherein the selected modulation scheme, and the selected type of FEC encoding are based on the selected codec. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for use by a wireless communication unit, the method comprising:
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generating data for transmission to a second communication unit; encoding the data using a codec selected from a plurality of codecs, wherein each of the plurality of codecs is associated with a data rate, and wherein one of the plurality of codecs is an excitation linear prediction codec; forward error correction encoding the encoded data according to a selected type of FEC encoding; modulating the FEC encoded data according to a selected modulation scheme; and transmitting the modulated FEC encoded data to a second communication unit in at least one time slot; wherein the selected modulation scheme, and the selected type of FEC encoding are based on the selected codec. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification