Methods and apparatus for signaling data rate option information
First Claim
1. A method comprising operating a wireless terminal to perform the following:
- identifying a predetermined subset of OFDM tone symbols in an uplink channel segment corresponding to uplink rate option information to be communicated in said uplink channel segment, different predetermined subsets of OFDM tone symbols corresponding to different uplink rate option information;
transmitting data in said uplink channel segment; and
indicating, via the placement of energy on tone symbols, in the uplink channel segment which includes said data, uplink rate option information by transmitting on tone symbols corresponding to said identified subset of tone symbols at an increased power level relative to tone symbols not in said identified predetermined subset, said uplink rate option information providing information about the transmission rate of data transmitted in said uplink channel segment.
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Accused Products
Abstract
A wireless terminal includes an uplink rate option indicator in the same uplink channel segment with data, the rate option indicator providing transmission rate information about the data transmitted in the segment. The indicator value is represented by an energy pattern within the segment. Different energy patterns correspond to different indicator values. The number of indicator values is less than the number of possible uplink data rate options supported by the wireless terminal. A single indicator value represents different uplink data rate options, at different times, as a function of a received maximum data rate option and/or type of assignment message. The maximum data rate option and/or assignment message was transmitted by the same base station receiving the indicator value; therefore, there is no ambiguity between wireless terminal and base station as to the interpretation of the uplink data rate option indicator value with respect to an individual uplink segment.
76 Citations
34 Claims
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1. A method comprising operating a wireless terminal to perform the following:
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identifying a predetermined subset of OFDM tone symbols in an uplink channel segment corresponding to uplink rate option information to be communicated in said uplink channel segment, different predetermined subsets of OFDM tone symbols corresponding to different uplink rate option information; transmitting data in said uplink channel segment; and indicating, via the placement of energy on tone symbols, in the uplink channel segment which includes said data, uplink rate option information by transmitting on tone symbols corresponding to said identified subset of tone symbols at an increased power level relative to tone symbols not in said identified predetermined subset, said uplink rate option information providing information about the transmission rate of data transmitted in said uplink channel segment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 15, 16, 34)
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12. A method comprising operating a wireless terminal to perform the following:
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transmitting data in an uplink channel segment; indicating, in the uplink channel segment which includes said data, uplink rate option information, said uplink rate option information providing transmission rate information about the data transmitted in said segment; and wherein the uplink channel segment includes a plurality of tone-halfslots, each tone-halfslot including a predetermined number of temporally consecutive tone-symbols corresponding to the same tone, the tone-halfslots having a predetermined tone-halfslot index order within the segment, each tone half-slot being identified by a tone-halfslot index value k, each tone-symbol within a tone-halfslot being identified by a relative tone-symbol index j, the equation j=MOD (k+X, m) identifying tone-symbols within the tone-halfslots which belong to the subset of tone-symbols, corresponding to the one of the N indicator values, one tone-symbol in each tone-halfslot corresponding to the indicator value being communicated, where X is the indicator value being communicated and X is an integer in the range 0 to m−
1;
where j is an integer value in the range 0 to m−
1; and
k is an integer value in the range of 0 to the total number of tone-halfslots in the segment minus 1, where m is a positive integer greater than 4, and where MOD indicates a modulo function. - View Dependent Claims (13)
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14. A method comprising operating a wireless terminal to perform the following:
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transmitting data in an uplink channel segment; indicating, in the uplink channel segment which includes said data, uplink rate option information, said uplink rate option information providing transmission rate information about the data transmitted in said segment; and wherein the uplink channel segment includes a plurality of tone-halfslots, each tone-halfslot including a predetermined number of temporally consecutive tone-symbols corresponding to the same tone, the tone-halfslots having a predetermined tone-halfslot index order within the segment, each tone half-slot being identified by a tone-halfslot index value k, each tone-symbol within a tone-halfslot being identified by a relative tone-symbol index j, the equation j=MOD (k−
X, m) identifying tone-symbols within the tone-halfslots which belong to the subset of tone-symbols, corresponding to the one of the N indicator values, one tone-symbol in each tone-halfslot corresponding to the indicator value being communicated, where X is the indicator value being communicated and X is an integer in the range 0 to m−
1;
where j is an integer value in the range 0 to m−
1; and
k is an integer value in the range of 0 to the total number of tone-halfslots in the segment minus 1, where m is a positive integer greater than 4, and where MOD indicates a modulo function.
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17. A wireless terminal which uses uplink transmission segments, individual uplink transmission segments including a fixed number of uplink transmission units, different uplink transmission segments having the same or different fixed numbers of uplink transmission units, the wireless terminal comprising:
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an encoder for generating coded bits at a coding rate corresponding to an uplink rate option, said coded bits being generated from data bits to be transmitted; a modulator for modulating the coded bits into modulation symbols using a modulation method corresponding to said uplink rate option; a rate option indicator module for identifying a predetermined subset of OFDM tone symbols in an uplink channel segment corresponding to uplink rate option information to be communicated in said uplink channel segment, different predetermined subsets of OFDM tone symbols corresponding to different uplink rate option information; and a transmission module for transmitting data on OFDM tone symbols in said uplink channel segment and for indicating via the placement of energy on tone symbols in said uplink segment, uplink rate option information, said transmission module transmitting on tone symbols corresponding to said identified subset of tone symbols at an increased power level relative to tone symbols not in said identified predetermined subset, said uplink rate option information providing information about the transmission rate of data transmitted in said segment. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A wireless terminal which uses uplink transmission segments, individual uplink transmission segments including a fixed number of uplink transmission units, different uplink transmission segments having the same or different fixed numbers of uplink transmission units, the wireless terminal comprising:
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means for generating coded bits at a coding rate corresponding to an uplink rate option, said coded bits being generated from data bits to be transmitted; means for modulating the coded bits into modulation symbols using a modulation method corresponding to said uplink rate option; means for identifying a predetermined subset of OFDM tone symbols in an uplink channel segment corresponding to unlink rate option information to be communicated in said uplink channel segment, different predetermined subsets of OFDM tone symbols corresponding to different uplink rate option information; and means for transmitting data on OFDM tone symbols in said uplink channel segment and for indicating via the placement of energy on tone symbols in said uplink segment, uplink rate option information, said means for transmitting transmit on tone symbols corresponding to said identified subset of tone symbols at an increased power level relative to tone symbols not in said identified predetermined subset, said uplink rate option information providing information about the transmission rate of data transmitted in said segment. - View Dependent Claims (30, 31)
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32. A non-transitory computer readable storage medium embodying computer executable instructions, for use in a wireless terminal, said non-transitory computer readable storage medium comprising:
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instructions for causing at least one computer to identify a predetermined subset of OFDM tone symbols in an uplink channel segment corresponding to uplink rate option information to be communicated in said uplink channel segment different predetermined subsets of OFDM tone symbols corresponding to different uplink rate option information; instructions for causing the at least one computer to transmit data in said uplink channel segment; and instructions for causing the at least one computer to indicate, via the placement of energy on tone symbols, in the uplink channel segment which includes said data, uplink rate option information by transmitting on tone symbols corresponding to said identified subset of tone symbols at an increased power level relative to tone symbols not in said identified predetermined subset, said uplink rate option information providing information about the transmission rate of data transmitted in said segment. - View Dependent Claims (33)
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Specification