Flexible time-frequency multiplexing structure for wireless communication
First Claim
1. An apparatus comprising:
- at least one processor to select code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) for each of multiple traffic segments within a traffic interval, and to generate an output waveform comprised of the multiple traffic segments, the each of the multiple traffic segments carrying CDM data if CDM is selected or OFDM data if OFDM is selected; and
a memory coupled to the at least one processor,wherein the multiple traffic segments are segmented by frequency within the traffic interval,wherein the at least one processor is capable of selecting CDM for a first traffic segment of the multiple traffic segments and OFDM for a second traffic segment of the multiple traffic segments and generating the output waveform comprised of the multiple traffic segments for simultaneous transmission, each of the multiple traffic segments carrying CDM data or OFDM data,wherein the first and second traffic segments of the multiple traffic segments are in a same half-slot in a same carrier, andwherein the output waveform further comprises at least one overhead segment comprising OFDM data.
1 Assignment
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Accused Products
Abstract
Techniques for efficiently sending data in a wireless communication system are described. Code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) may be selected for each traffic segment, which may correspond to specific time frequency resources. An output waveform comprised of traffic and overhead segments may be generated. Each traffic segment may carry CDM data at a chip rate if CDM is selected or OFDM data if OFDM is selected. OFDM symbols may be generated at a sample rate that may be an integer ratio of the chip rate and may have a duration that may be determined based on the traffic segment duration. The output waveform may carry CDM data and/or OFDM data on subcarriers corresponding to at least one carrier in a spectral allocation and may further carry OFDM data on remaining usable subcarriers in the spectral allocation.
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Citations
33 Claims
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1. An apparatus comprising:
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at least one processor to select code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) for each of multiple traffic segments within a traffic interval, and to generate an output waveform comprised of the multiple traffic segments, the each of the multiple traffic segments carrying CDM data if CDM is selected or OFDM data if OFDM is selected; and a memory coupled to the at least one processor, wherein the multiple traffic segments are segmented by frequency within the traffic interval, wherein the at least one processor is capable of selecting CDM for a first traffic segment of the multiple traffic segments and OFDM for a second traffic segment of the multiple traffic segments and generating the output waveform comprised of the multiple traffic segments for simultaneous transmission, each of the multiple traffic segments carrying CDM data or OFDM data, wherein the first and second traffic segments of the multiple traffic segments are in a same half-slot in a same carrier, and wherein the output waveform further comprises at least one overhead segment comprising OFDM data. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method within an apparatus, comprising:
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selecting code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) for each of multiple traffic segments within a traffic interval; and generating an output waveform comprised of the multiple traffic segments, the each of the multiple traffic segments carrying CDM data if CDM is selected or OFDM data if OFDM is selected, wherein the multiple traffic segments are segmented by frequency within the traffic interval, wherein the selecting comprises selecting CDM for a first traffic segment of the multiple traffic segments and OFDM for a second traffic segment of the multiple traffic segments, wherein the generating comprises generating the output waveform comprised of the multiple traffic segments for simultaneous transmission, wherein the first and second traffic segments of the multiple traffic segments are in a same half-slot in a same carrier, and wherein the output waveform further comprises at least one overhead segment comprising OFDM data. - View Dependent Claims (9)
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10. An apparatus comprising:
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means for selecting code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) for each of multiple traffic segments within a traffic interval; and means for generating an output waveform comprised of the multiple traffic segments, the each of the multiple traffic segments carrying CDM data if CDM is selected or OFDM data if OFDM is selected, wherein the multiple traffic segments are segmented by frequency within the traffic interval, wherein the means for selecting is capable of selecting CDM for a first traffic segment of the multiple traffic segments and OFDM for a second traffic segment of the multiple traffic segments, wherein the means for generating generates the output waveform comprised of the multiple traffic segments for simultaneous transmission, wherein the first and second traffic segments of the multiple traffic segments are in a same half-slot in a same carrier, and wherein the output waveform further comprises at least one overhead segment comprising OFDM data. - View Dependent Claims (11)
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12. An apparatus comprising:
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at least one processor configured to select code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) for a plurality of traffic segments within a traffic interval, the traffic segments being segmented by frequency within the traffic interval, to generate CDM data at a chip rate and to send the CDM data in a first traffic segment of the plurality of traffic segments within the traffic interval if CDM is selected for the first traffic segment, and to generate at least one OFDM symbol at a sample rate and to send the at least one OFDM symbol in a second traffic segment of the plurality of traffic segments within the traffic interval if OFDM is selected for the second traffic segment, the sample rate being related to the chip rate by an integer ratio, each OFDM symbol having a duration determined based on duration of the traffic interval, wherein the first and second traffic segments of the plurality of traffic segments are in a same half-slot in a same carrier, and wherein an overhead interval comprising at least one long OFDM symbol is time division multiplexed with the traffic interval; and a memory coupled to the at least one processor. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method within an apparatus, comprising:
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selecting code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) for a plurality of traffic segments within a traffic interval, the traffic segments being segmented by frequency within the traffic interval; generating CDM data at a chip rate and sending the CDM data in a first traffic segment of the plurality of traffic segments within the traffic interval if CDM is selected; and generating at least one OFDM symbol at a sample rate and sending the at least one OFDM symbol in a second traffic segment of the plurality of traffic segments within the traffic interval if OFDM is selected, the sample rate being related to the chip rate by an integer ratio, each OFDM symbol having a duration determined based on duration of the traffic interval, wherein the first and second traffic segments of the plurality of traffic segments are in a same half-slot in a same carrier, and wherein an overhead interval comprising at least one long OFDM symbol is time division multiplexed with the traffic interval. - View Dependent Claims (22)
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23. An apparatus comprising:
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means for selecting code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) for a plurality of traffic segments within a traffic interval, the traffic segments being segmented by frequency within the traffic interval; means for generating CDM data at a chip rate and sending the CDM data in a first traffic segment of the plurality of traffic segments within the traffic interval if CDM is selected; and means for generating at least one OFDM symbol at a sample rate and sending the at least one OFDM symbol in a second traffic segment of the plurality of traffic segments within the traffic interval if OFDM is selected, the sample rate being related to the chip rate by an integer ratio, each OFDM symbol having a duration determined based on duration of the traffic interval, wherein the first and second traffic segments of the plurality of traffic segments are in a same half-slot in a same carrier, and wherein an overhead interval comprising at least one long OFDM symbol is time division multiplexed with the traffic interval. - View Dependent Claims (24)
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25. An apparatus comprising:
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at least one processor configured to determine whether code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) is used for a plurality of traffic segments within a traffic interval, the traffic segments being segmented by frequency within the traffic interval, to process received samples to recover CDM data sent in a first traffic segment of the plurality of traffic segments, and to process the received samples to recover OFDM data sent in a second traffic segment of the plurality of traffic segments and in an overhead segment, wherein the first and second traffic segments of the plurality of traffic segments are in a same half-slot in a same carrier; and a memory coupled to the at least one processor. - View Dependent Claims (26, 27, 28, 29)
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30. A method within an apparatus, comprising:
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determining whether code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) is used for a plurality of traffic segments within a traffic interval, the plurality of traffic segments being segmented by frequency within the traffic interval; processing received samples to recover CDM data sent in a first traffic segment of the plurality of traffic segments; and processing the received samples to recover OFDM data sent in a second traffic segment of the plurality of traffic segments and in an overhead segment, wherein the first and second traffic segments of the plurality of traffic segments are in a same half-slot in a same carrier. - View Dependent Claims (31)
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32. An apparatus comprising:
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means for determining whether code division multiplexing (CDM) or orthogonal frequency division multiplexing (OFDM) is used for a plurality of traffic segments within a traffic interval, the plurality of traffic segments being segmented by frequency within the traffic interval; means for processing received samples to recover CDM data sent in a first traffic segment of the plurality of traffic segments; and means for processing the received samples to recover OFDM data sent in a second traffic segment of the plurality of traffic segments and in an overhead segment, wherein the first and second traffic segments of the plurality of traffic segments are in a same half-slot in a same carrier. - View Dependent Claims (33)
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Specification