Method and apparatus for automatically attempting to seize a radio channel in a multichannel communication system
First Claim
1. Control means for a mobile station of a multichannel radio communication system, wherein said mobile station includes means for scanning the radio channels for a non-busy radio channel and providing an indication signal when a non-busy radio channel has been detected and means for attempting to seize a radio channel, said control means including:
- (a) means for generating a clock input having successive clock cycle intervals;
(b) counting means responsive to the clock signal for continuously totallizing the clock cycle intervals of the clock signal to provide a totallized count thereof, the counting means being incremented for each clock cycle interval in response to the presence of the indication signal and being decremented for each clock cycle interval in response to the absence of the indication signal;
(c) means responsive to an unsuccessful channel seizure attempt by said seizing means for generating a random time interval having a magnitude that is at most a maximum magnitude, where the maximum magnitude is inversely proportional to the totallized count of the counting means; and
(d) means for automatically attempting to seize a radio channel at the end of the random time interval.
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Abstract
Apparatus is disclosed for enabling a mobile radiotelephone to automatically attempt to seize a radio channel in a multichannel radio communication system. The mobile radiotelephone scans the radio channels for a non-busy radio channel and provides an indication signal when detecting a non-busy radio channel. A counter which is continuously clocked by a clock signal is incremented for each clock cycle interval of the clock signal in response to the presence of the indication signal and is decremented for each clock cycle interval of the clock signal in response to the absence of the indication signal. Thus, the totalized count of the counter is proportional to the degree of radio channel blocking of the radiotelephone system. After an unsuccessful channel seizure attempt by the mobile radiotelephone user, time interval generating circuitry provides a random time interval that has a maximum magnitude that is inversely proportional to the totallized count of the counter. Thus, the maximum random time interval is shortest when the totallized count of the counter is greatest. At the end of the random time interval, circuitry automatically attempts to seize a radio channel and if unsuccessful, additional automatic channel seizure attempts are provided after corresponding random time intervals. Thus, overall radiotelephone system efficiency is enhanced by dynamically optimizing the average random time interval between automatic channel seizure attempts according to the degree of radio channel blocking.
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Citations
42 Claims
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1. Control means for a mobile station of a multichannel radio communication system, wherein said mobile station includes means for scanning the radio channels for a non-busy radio channel and providing an indication signal when a non-busy radio channel has been detected and means for attempting to seize a radio channel, said control means including:
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(a) means for generating a clock input having successive clock cycle intervals; (b) counting means responsive to the clock signal for continuously totallizing the clock cycle intervals of the clock signal to provide a totallized count thereof, the counting means being incremented for each clock cycle interval in response to the presence of the indication signal and being decremented for each clock cycle interval in response to the absence of the indication signal; (c) means responsive to an unsuccessful channel seizure attempt by said seizing means for generating a random time interval having a magnitude that is at most a maximum magnitude, where the maximum magnitude is inversely proportional to the totallized count of the counting means; and (d) means for automatically attempting to seize a radio channel at the end of the random time interval. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. Control means for a mobile station of a multi-channel radio communication system, wherein said mobile station includes means for scanning the radio channels for a non-busy radio channel and providing an indication signal when a non-busy radio channel has been detected and means for attempting to seize a radio channel, said control means including:
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(a) means for generating a clock signal having successive clock cycle intervals; (b) counting means responsive to the clock signal for continuously totallizing the clock cycle intervals of the clock signal to provide a totallized count thereof, the counting means being decremented for each clock cycle interval in response to the presence of the indication signal and being incremented for each clock cycle interval in response to the absence of the indication signal; (c) means responsive to an unsuccessful channel seizure attempt by said seizing means for generating a random time interval having a magnitude that is at most a maximum magnitude, where the maximum magnitude is proportional to the totallized count of the counting means; and (d) means for automatically attempting to seize a radio channel at the end of the random time interval.
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13. A method of seizing a radio channel in a multi-channel radio communications system, said method comprising the steps of:
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(a) continuously scanning the radio channels and detecting a non-busy channel; (b) establishing a time interval having a predetermined magnitude; (c) increasing the magnitude of the time interval when a non-busy radio channel is detected; (d) decreasing the magnitude of the time interval when a non-busy radio channel is not detected; (e) attempting to seize a radio channel; (f) generating in response to an unsuccessful attempt to seize a radio channel a random time interval having a maximum magnitude that is inversely proportional to the magnitude of the time interval; and (g) automatically attempting to seize a radio channel at the end of the random time interval. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of seizing a radio channel in a multi-channel radio communications system, said method comprising the steps of:
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(a) continuously scanning the radio channels and detecting a non-busy radio channel; (b) establishing a time interval having a predetermined magnitude; (c) decreasing the magnitude of the time interval when a non-busy radio channel is detected; (d) increasing the magnitude of the time interval when a non-busy radio signal is not detected; (e) attempting to seize a radio channel; (f) generating in response to an unsuccessful attempt to seize a radio channel in random time interval having a maximum magnitude that is proportional to the magnitude of the time interval; and (g) automatically attempting to seize a radio channel at the end of the random time interval.
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25. A method of seizing a radio channel in a multichannel radio communications system, said method comprising the steps of:
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(a) continuously scanning the radio channels and detecting a non-busy radio channel; (b) establishing a time interval having a predetermined magnitude; (c) increasing the method of the time interval when a non-busy radio channel is detected; (d) decreasing the magnitude of the time interval when a non-busy radio channel is not detected; (e) generating a random time interval having a maximum magnitude that is inversely proportional to the magnitude of the time interval; and (f) automatically attempting to seize a radio channel at the end of the random time interval. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method of seizing a radio channel in a multichannel radio communications system, said method comprising the steps of:
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(a) continuously scanning the radio channels and detecting a non-busy radio channel; (b) establishing a time interval having a predetermined magnitude; (c) decreasing the magnitude of the time interval when a non-busy radio channel is detected; (d) increasing the magnitude of the time interval when a non-busy radio channel is not detected; (e) generating a random time interval having a maximum magnitude that is proportional to the magnitude of the time interval; and (f) automatically attempting to seize a radio channel at the end of the random time interval.
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37. A method of seizing a radio channel in a multi-channel radio communications system, said method comprising the steps of:
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(a) continuously scanning the radio channels and detecting a busy radio channel; (b) establishing a time interval having a predetermined magnitude; (c) increasing the magnitude of the time interval when a busy radio channel is detected; (d) decreasing the magnitude of the time interval when a busy radio channel is not detected; (e) generating a random time interval having a maximum magnitude that is proportional to the magnitude of the time interval; and (f) automatically attempting to seize a radio channel at the end of the random time interval.
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38. A method of seizing a radio channel in a multi-channel radio communications system, said method comprising the steps of:
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(a) continuously scanning the radio channels and detecting a busy radio channel; (b) establishing a time interval having a predetermined magnitude; (c) decreasing the magnitude of the time interval when a busy radio channel is detected; (d) increasing the magnitude of the time interval when a busy radio channel is not detected; (e) generating a random time interval having a maximum magnitude that is inversely proportional to the magnitude of the time interval; and (f) automatically attempting to seize a radio channel at the end of the random time interval.
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39. Control means for a mobile station of a multi-channel radio communication system, wherein said mobile station includes means for scanning the radio channels for a busy radio channel and providing an indication signal when a busy radio channel has been detected, said control means including:
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(a) means for generating a clock signal having successive clock cycle intervals; (b) counting means responsive to the clock signal for continuously totallizing the clock cycle intervals of the clock signal to provide a totallized count thereof, the counting means being incremented for each clock cycle interval in response to the presence of the indication signal and being decremented for each clock cycle interval in response to the absence of the indication signal; (c) means for generating a random time interval having a magnitude that is at most a maximum magnitude, where the maximum magnitude is proportional to the totallized count of the counting means; and (d) means for automatically attempting to seize a radio channel at the end of the random time interval.
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40. Control means for a mobile station of a multi-channel radio communication system, wherein said mobile station includes means for scanning the radio channels for a non-busy radio channel and providing an indication signal when a non-busy radio channel has been detected, said control means including:
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(a) means for generating a clock signal having successive clock cycle intervals; (b) counting means responsive to the clock signal for continuously totallizing the clock cycle intervals of the clock signal to provide a totallized count thereof, the counting means being incremented for each clock cycle interval in response to the presence of the indication signal and being decremented for each clock cycle interval in response to the absence of the indication signals; (c) means for generating a random time interval having a magnitude that is at most a maximum magnitude, where the maximum magnitude is inversely proportional to the totallized count of the counting means; and (d) means for automatically attempting to seize a radio channel at the end of the random time interval.
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41. Control means for a mobile station of a multi-channel radio communication system, wherein said mobile station includes means for scanning the radio channels for a radio channel and providing an indication signal when a busy radio channel has been detected, said control means including:
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(a) means for generating a clock signal having successive clock cycle intervals; (b) counting means responsive to the clock signal for continuously totallizing the clock cycle intervals of the clock signal to provide a totallized count thereof, the counting means being decremented for each clock cycle interval in response to the presence of the indication signal and being incremented for each clock cycle interval in response to the absence of the indication signal; (c) means for generating a random time interval having a magnitude that is at most a maximum magnitude, where the maximum magnitude is inversely proportional to the totallized count of the counting means; and (d) means for automatically attempting to seize a radio channel at the end of the random time interval.
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42. Control means for a mobile station of a multi-channel radio communication system, wherein said mobile station includes means for scanning the radio channels for a non-busy radio channel and providing an indication signal when a non-busy radio channel has been detected, said control means including:
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(a) means for generating a clock signal having successive clock cycle intervals; (b) counting means responsive to the clock signal for continuously totallizing the clock cycle intervals of the clock signal to provide a totallized count thereof, the counting means being decremented for each clock cycle interval in response to the presence of the indication signal and being incremented for each clock cycle interval in response to the absence of the indication signal; (c) means for generating a random time interval having a magnitude that is at most a maximum magnitude, where the maximum magnitude is proportional to the totallized count of the counting means; and (d) means for automatically attempting to seize a radio channel at the end of the random time interval.
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Specification