Methods and apparatus for measuring, communicating and/or using interference information
First Claim
1. A method of operating a communications apparatus, the method comprising:
- measuring interference;
generating a first pilot in at least some subcarriers of a first OFDM pilot symbol;
generating a second pilot in at least some subcarriers of a second OFDM pilot symbol;
generating interference information in at least some other subcarriers of the second OFDM pilot symbol; and
transmitting a preamble, said preamble including a plurality of pilot symbols, wherein said plurality of pilot symbols includes said first and second OFDM pilot symbols.
1 Assignment
0 Petitions
Accused Products
Abstract
Wireless communications methods and apparatus are described. A communications apparatus, e.g., a base station, measures interference information, e.g., other sector interference information. The communications apparatus generates a preamble which includes a plurality of pilot symbols and at least one of the pilot symbols includes interference information. In some embodiments, the preamble is part of a superframe structure, e.g., a recurring superframe structure, including the preamble and a plurality of frames, at least some of the frames used to convey traffic data. The communications apparatus transmits the preamble, thus broadcasting the interference information to access terminals in the vicinity. An access terminal receives the preamble including a plurality of pilot signals, at least one of the pilot signals including interference information. The access terminal recovers the interference information from the received preamble and controls signal transmission based on the recovered interference information.
31 Citations
72 Claims
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1. A method of operating a communications apparatus, the method comprising:
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measuring interference; generating a first pilot in at least some subcarriers of a first OFDM pilot symbol; generating a second pilot in at least some subcarriers of a second OFDM pilot symbol; generating interference information in at least some other subcarriers of the second OFDM pilot symbol; and transmitting a preamble, said preamble including a plurality of pilot symbols, wherein said plurality of pilot symbols includes said first and second OFDM pilot symbols. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A wireless communications apparatus, the apparatus comprising:
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an interference measurement hardware module; and a preamble generation hardware module for generating a preamble, said preamble including a plurality of pilot symbols, wherein said plurality of pilot symbols includes first and second OFDM pilot symbols, and wherein said preamble generation hardware module includes; a first pilot generation hardware module for generating a first pilot in at least some subcarriers of the first OFDM pilot symbol, a second pilot generation hardware module for generating a second pilot in at least some subcarriers of the second OFDM pilot symbol, and an interference information generation hardware module for generating interference information in at least some other subcarriers of the second OFDM pilot symbol. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A wireless communications apparatus, the apparatus comprising:
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interference measurement means; and means for generating a preamble, said preamble including a plurality of pilot symbols, wherein said plurality of pilot symbols includes first and second OFDM pilot symbols, and wherein said means for generating includes; first pilot generation means for generating a first pilot in at least some subcarriers of the first OFDM pilot symbol, second pilot generation means for generating a second pilot in at least some subcarriers of the second OFDM pilot symbol, and interference information generation means for generating interference information in at least some other subcarriers of the second OFDM pilot symbol. - View Dependent Claims (29, 30, 31)
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32. An apparatus comprising:
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a processor configured to;
measure interference;
generate a first pilot in at least some subcarriers of a first OFDM pilot symbol;
generate a second pilot in at least some subcarriers of a second OFDM pilot symbol;generate interference information in at least some other subcarriers of the second OFDM pilot symbol; operate a transmitter to transmit a preamble, said preamble including a plurality of pilot symbols, wherein said plurality of pilot symbols includes said first and second OFDM pilot symbols; and a memory coupled to the processor. - View Dependent Claims (33, 34, 35)
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36. A non-transitory computer readable medium embodying machine executable instructions for controlling a communications apparatus to implement a method of communicating with another communications device, the method comprising:
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measuring interference; generating a first pilot in at least some subcarriers of a first OFDM pilot symbol; generating a second pilot in at least some subcarriers of a second OFDM pilot symbol; generating interference information in at least some other subcarriers of the second OFDM pilot symbol; and transmitting a preamble, said preamble including a plurality of pilot symbols, wherein said plurality of pilot symbols includes said first and second OFDM pilot symbols. - View Dependent Claims (37, 38, 39)
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40. A method of operating an access terminal, the method comprising:
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receiving a preamble, said preamble including a plurality of pilot symbols, wherein said plurality of pilot symbols includes a first pilot in at least some subcarriers of a first OFDM pilot symbol, a second pilot in at least some subcarriers of a second OFDM pilot symbol, and interference information in at least some other subcarriers of the second OFDM pilot symbol; recovering interference information from the received preamble; and controlling signal transmission based on the recovered interference information. - View Dependent Claims (41, 42, 43, 44, 45, 46, 47, 48)
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49. A communication system comprising an access terminal and another communications device, comprising:
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a receiver for receiving a preamble, said preamble including a plurality of pilot symbols, wherein said plurality of pilot symbols includes a first pilot in at least some subcarriers of a first OFDM pilot symbol, a second pilot in at least some subcarriers of a second OFDM pilot symbol, and interference information in at least some other subcarriers of the second OFDM pilot symbol; an interference information recovery hardware module for recovering interference information from the received preamble; and a transmission control hardware module for controlling signal transmission based on the recovered interference information. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57)
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58. A communication system comprising an access terminal and another communications device, comprising:
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receiver means for receiving a preamble, said preamble including a plurality of pilot symbols, wherein said plurality of pilot symbols includes a first pilot in at least some subcarriers of a first OFDM pilot symbol, a second pilot in at least some subcarriers of a second OFDM pilot symbol, and interference information in at least some other subcarriers of the second OFDM pilot symbol; means for recovering interference information from the received preamble; and means for controlling signal transmission based on the recovered interference information. - View Dependent Claims (59, 60, 61, 62)
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63. A communications system comprising an apparatus comprising:
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a processor configured to; receive a preamble, said preamble including a plurality of pilot symbols, wherein said plurality of pilot symbols includes a first pilot in at least some subcarriers of a first OFDM pilot symbol, a second pilot in at least some subcarriers of a second OFDM pilot symbol interference information in at least some other subcarriers of the second OFDM pilot symbol;
recover interference information from the received preamble; and
control signal transmission based on the recovered interference information; anda memory coupled to the processor. - View Dependent Claims (64, 65, 66, 67)
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68. A non-transitory computer readable medium embodying machine executable instructions for controlling an access terminal to implement a method of communicating with another communications device, the method comprising:
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receiving a preamble, said preamble including a plurality of pilot symbols, wherein said plurality of pilot symbols includes a first pilot in at least some subcarriers of a first OFDM pilot symbol, a second pilot in at least some subcarriers of a second OFDM pilot symbol, and interference information in at least some other subcarriers of the second OFDM pilot symbol; recovering interference information from the received preamble; and controlling signal transmission based on the recovered interference information. - View Dependent Claims (69, 70, 71, 72)
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Specification