Enhanced beacon signaling method and apparatus
First Claim
1. A method of operating a base station transmitter in a frequency division multiplexed communications system, the method comprising:
- transmitting first signals into a first region using a set of N tones to communicate information over a first period of time, said first period of time being at least two seconds long, where N is larger than 10; and
transmitting during a second period of time a second signal including a set of X tones into said first region, where X is less than 5, and where less than 80% of a maximum average total base station transmission power used by said base station transmitter to transmit signals into the first region during any 1 second period during said first period of time is allocated to said set of X tones and each one of said X tones to which power is allocated receives at least 20 times the per tone average power allocated to tones during said any one second period.
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Accused Products
Abstract
Methods and apparatus for using high power narrow signals, e.g., tones, for communicating transmitter information without putting the full transmission power available into the transmitted tone or tones are described. User data is transmitted in parallel with transmitter information in many embodiments with the user data being allocated more than 20% of the transmitter'"'"'s maximum output power in many cases. Buy using an amount of power on the tones used to communicate transmitter information while simultaneously transmitting user data with more than 20% of the available transmission power, efficient bandwidth utilization is achieved while still ensuring a high probability that that the transmitter information signals will be received and detectable using simple energy detection techniques and without the need for timing synchronization with the transmitter to be achieved for success interpretation of the transmitter information.
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Citations
61 Claims
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1. A method of operating a base station transmitter in a frequency division multiplexed communications system, the method comprising:
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transmitting first signals into a first region using a set of N tones to communicate information over a first period of time, said first period of time being at least two seconds long, where N is larger than 10; and
transmitting during a second period of time a second signal including a set of X tones into said first region, where X is less than 5, and where less than 80% of a maximum average total base station transmission power used by said base station transmitter to transmit signals into the first region during any 1 second period during said first period of time is allocated to said set of X tones and each one of said X tones to which power is allocated receives at least 20 times the per tone average power allocated to tones during said any one second period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A base station for use in a frequency division multiplexed communications system the base station, the base station comprising:
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a transmitter that uses a set of N tones to communicate information into a first region, where N is larger than 10;
first control means coupled to said transmitter, for controlling the transmitter to transmit over a first period of time using first signals into the first region, said first period of time being at least two seconds long; and
second control means coupled to said transmitter for controlling the transmitter to transmit during a second period of time a second signal including a set of X tones into said first region, where X is a positive integer less than 5, and where less than 80% of a maximum average total base station transmission power used by said base station transmitter to transmit into the first region during any 1 second period during said first period of time is allocated to said set of X tones and where each one of said X tones to which power is allocated is at least 20 times the per tone maximum average power allocated to tones during any one second time period in said first time period. - View Dependent Claims (29, 30, 31, 32, 33, 47, 48, 49, 50, 51)
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34. A method of operating a base station transmitter in a communication system, the method comprising:
transmitting a signal in a first period of time, said signal including a plurality of M signal tones, where M is larger than 10, each signal tone corresponding to a different frequency, said first period of time being at least two seconds long, said signal including a beacon signal transmitted on at least one tone and a user data signal transmitted in parallel with said beacon signal on tones which are not used to transmit said beacon signal, said user data having been transmitted by said first transmitter with more than 20% of the maximum average total base station transmission power used by said base station transmitter to transmit signals into a first region during any 1 second period of time during said first period of time. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 52, 53, 54, 55, 56)
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45. A base station transmitter for use in a communication system, the transmitter comprising:
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a transmitter for transmitting signals including multiple tones, each tone corresponding to a different frequency; and
transmitter control means for controlling the transmitter to transmit a signal in a single symbol transmission time period using a plurality of signal tones that are transmitted in parallel, each signal tone corresponding to a different frequency, said control means causing user data to be transmitted on signal tones with more than 20% of the base stations transmitter'"'"'s maximum possible transmission power for a symbol time period being placed on tones used to communicate user data, said signal also including a beacon signal transmitted on at least one tone on which user data is not transmitted, said beacon signal being transmitted with more than 20 times the transmission power of any of the signal tones used to transmit user data. - View Dependent Claims (46, 57, 58, 59, 60, 61)
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Specification