Methods and apparatus for using tones in a wireless communication system
First Claim
Patent Images
1. A method of using a block of tones to communicate information, the method comprising:
- determining, for a first recurring time period, according to a first tone set hopping sequence a tone subset on which no power is to be transmitted, said determined tone subset including at least 30 percent of the tones in said block of tones; and
using, during a second recurring time period, said block of tones to transmit information, at least 70 percent of said tones being available for communicating non-zero modulation symbols during the second recurring time period.
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Abstract
Methods and apparatus for allocating tones for communications in the strip-symbol periods in an OFDM system are described. In a strip-symbol, the signal is transmitted using the tones in a tone subset, which is selected from a predetermined set of tone subsets according to a fixed schedule sequence. Adjacent base stations and sectors use the same set of tone subsets but different schedule sequence to minimize the number of collisions between the tone subsets used in adjacent sectors and neighboring cells.
39 Citations
68 Claims
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1. A method of using a block of tones to communicate information, the method comprising:
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determining, for a first recurring time period, according to a first tone set hopping sequence a tone subset on which no power is to be transmitted, said determined tone subset including at least 30 percent of the tones in said block of tones; and using, during a second recurring time period, said block of tones to transmit information, at least 70 percent of said tones being available for communicating non-zero modulation symbols during the second recurring time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A communications device comprising:
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a memory including stored transmitter control information; a communication module for using a block of tones to communicate information; a determination module for determining, during a first recurring time period, according to a first tone set hopping sequence a tone subset on which no power is to be transmitted, said determined tone subset including at least 30 percent of the tones in said block of tones; and a transmitter for transmitting during a second recurring time period using said block of tones to transmit information, at least 70 percent of said tones being available for communicating non-zero modulation symbols during said second time period. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A communications apparatus comprising:
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means for storing transmitter control information; means for using a block of tones to communicate information; means for determining, during a first recurring time period, according to a first tone set hopping sequence a tone subset on which no power is to be transmitted, said determined tone subset including at least 30 percent of the tones in said block of tones; and transmitter means for transmitting during a second recurring time period using said block of tones to transmit information, at least 70 percent of said tones being available for communicating non-zero modulation symbols during said second time period. - View Dependent Claims (28, 29, 30, 31)
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32. A machine readable medium including machine executable instructions for:
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determining according to a first tone set hopping sequence, for a first recurring time period, a tone subset on which no power is to be transmitted, said determined tone subset including at least 30 percent of the tones in a block of tones t; and transmitting information during a second recurring time period, using said block of tones, at least 70 percent of said tones being available for communicating non-zero modulation symbols during said second time period. - View Dependent Claims (33, 34, 35, 36)
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37. A method of operating a wireless terminal to recover information communicated using a block of tones, the method comprising:
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determining timing synchronization information with respect to a recurring third time period of a base station attachment point transmitter; synchronizing downlink reception using the determined timing synchronization information; identifying a first time period in said third time period; and recovering and processing a received strip symbol communicated during said first time period using a first tone subset hopping sequence corresponding to the first attachment point transmitter, said first time period being within said third time period, said first tone subset hopping sequence not being used in times within said third time period which are not first time periods. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A wireless terminal capable of recovering information communicated on a block of tones, the wireless terminal comprising:
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a time synchronization determination module for determining timing synchronization information with respect to a recurring third time period of a base station attachment point transmitter; a timing synchronization adjustment module for synchronizing downlink reception using the determined timing synchronization information; a first time period identification module for identifying a first time period in said third time period; and a first time period processing module for recovering and processing a received strip symbol communicated during said first time period using a first tone subset hopping sequence corresponding to the first attachment point transmitter, said first time period being within said third time period, said first tone subset hopping sequence not being used in times within said third time period which are not first time periods. - View Dependent Claims (48, 49, 50, 51, 52, 53, 54, 55, 56)
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57. A wireless terminal capable of recovering information communicated on a block of tones, the wireless terminal comprising:
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means for determining timing synchronization information with respect to a recurring third time period of a base station attachment point transmitter; timing synchronization means for synchronizing downlink reception using the determined timing synchronization information; first time period identification means for identifying a first time period in said third time period; and first time period processing means for recovering and processing a received strip symbol communicated during said first time period using a first tone subset hopping sequence corresponding to the first attachment point transmitter, said first time period being within said third time period, said first tone subset hopping sequence not being used in times within said third time period which are not first time periods. - View Dependent Claims (58, 59, 60, 61, 62, 63)
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64. A machine readable medium including machine executable instructions stored thereon which, when executed, control a wireless terminal to implement the steps of:
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determining timing synchronization information with respect to a recurring third time period of a base station attachment point transmitter; synchronizing downlink reception using the determined timing synchronization information; identifying a first time period in said third time period; and recovering and processing a received strip symbol communicated during said first time period using a first tone subset hopping sequence corresponding to the first attachment point transmitter, said first time period being within said third time period, said first tone subset hopping sequence not being used in times within said third time period which are not first time periods. - View Dependent Claims (65, 66, 67, 68)
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Specification