Base station for compressing and transmitting high speed data
First Claim
1. A telecommunications base station for receiving a plurality of telephone signals and for transmitting each of the telephone signals on a respective communication channel, wherein each of the communication channels is formed on a transmit radio frequency (RF) carrier that has a plurality of information slots and at least one of the information slots is assigned to one of the telephone signals so that respective telephone signals are modulated on respective RF carrier information slots;
- the base station comprising;
detector means for receiving and for monitoring each of the telephone signals to detect a data signal in one of the telephone signals;
encoding means for encoding the data signal to generate a coded signal;
control means for checking an assignment status of the information slots responsive to detection of the data signal and for locating a predetermined number of unassigned sequential information slots for a predetermined bandwidth, the assignment status indicating whether each information slot is unassigned or assigned to a respective one of the telephone signals;
channel forming means for forming the communication channel from the unassigned sequential information slots; and
means for modulating the coded signal on the communication channel;
wherebythe base station also receives at least one reconstructed telephone signal having a response data signal from a received RF carrier, each reconstructed telephone signal and each respective telephone signal being a channel pair;
the data signal has a corresponding data signal identification of a first type, and the response data signal has a corresponding data signal identification of a second type; and
the detector means inhibits the data signal identification of the first type until the communication channel is formed.
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Abstract
Two related 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. A High Speed Codec enables the base station to pass voiceband modem and FAX transmissions at up to 9.6 kb/s. An Ultra-High Speed Codec supports voiceband modem and FAX transmissions up to 14.4 kb/s. The High Speed Codec operates using three 16-phase RF slots or four 8-phase RF slots, and the Ultra-High Speed Codec 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
10 Claims
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1. A telecommunications base station for receiving a plurality of telephone signals and for transmitting each of the telephone signals on a respective communication channel, wherein each of the communication channels is formed on a transmit radio frequency (RF) carrier that has a plurality of information slots and at least one of the information slots is assigned to one of the telephone signals so that respective telephone signals are modulated on respective RF carrier information slots;
- the base station comprising;
detector means for receiving and for monitoring each of the telephone signals to detect a data signal in one of the telephone signals; encoding means for encoding the data signal to generate a coded signal; control means for checking an assignment status of the information slots responsive to detection of the data signal and for locating a predetermined number of unassigned sequential information slots for a predetermined bandwidth, the assignment status indicating whether each information slot is unassigned or assigned to a respective one of the telephone signals; channel forming means for forming the communication channel from the unassigned sequential information slots; and means for modulating the coded signal on the communication channel;
wherebythe base station also receives at least one reconstructed telephone signal having a response data signal from a received RF carrier, each reconstructed telephone signal and each respective telephone signal being a channel pair; the data signal has a corresponding data signal identification of a first type, and the response data signal has a corresponding data signal identification of a second type; and the detector means inhibits the data signal identification of the first type until the communication channel is formed. - View Dependent Claims (2, 3)
- the base station comprising;
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4. A telecommunications base station for receiving a plurality of telephone signals and for transmitting each of the telephone signals on a respective communication channel wherein each of the communication channels is formed on a transmit radio frequency (RF) carrier that has a plurality of information slots and at least one of the information slots is assigned to one of the telephone signals so that respective telephone signals are modulated on respective RF carrier information slots;
- whereby the telephone signals may include a data signal of a low speed type, a high speed type or an ultra high speed type;
the base station comprising;detector means for receiving and for monitoring each of the telephone signals to detect a data signal in one of the telephone signals and determine the speed type of the detected data signal; encoding means for encoding the data signal to generate a coded signal; control means for checking an assignment status of the information slots responsive to detection of the data signal and its speed type, and for locating a predetermined number of unassigned sequential information slots for a predetermined bandwidth, the assignment status indicating whether each information slot is unassigned or assigned to a respective one of the telephone signals, the predetermined number being a first number for a low speed type, a second number for a high speed type and a third number for an ultra high speed type; channel forming means for forming the communication channel from the unassigned sequential information slots; and means for modulating the coded signal on the communication channel. - View Dependent Claims (5, 6, 7)
- whereby the telephone signals may include a data signal of a low speed type, a high speed type or an ultra high speed type;
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8. A base station for processing a plurality of telephone signals on a respective communication channel, wherein each of the communication channels is formed from at least one of a plurality of information slots on a radio frequency (RF) carrier, the base station comprising:
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detector means for receiving and for monitoring each of the telephone signals to detect a data signal in one of the telephone signals; encoding means for encoding the data signal to generate a coded signal; control means for selecting a predetermined number of unassigned information slots for a predetermined bandwidth, the selection being based upon whether or not an information slot has been previously assigned to a respective one of the telephone signals; channel forming means for forming the communication channel from unassigned information slots; and means for modulating the coded signal on the communication channel for transmission over the RF carrier;
wherebythe base station also receives at least one return telephone signal having a return data signal over a second communication channel, each return telephone signal and its respective telephone signal being a channel pair; the data signal is of a first type, and the return data signal is of a second type; and the detector means inhibits the data signal of the first type until the communication channel is formed. - View Dependent Claims (9, 10)
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Specification