TRANSMISSION OF SIGNALING IN AN OFDM-BASED SYSTEM
First Claim
1. An apparatus for use in a wireless communication system, comprising:
- a modulating component configured to select M frequency subbands for transmission of signaling data from N frequency subbands available for transmission, and to select L frequency subbands for transmission of data symbols from the N frequency subbands,wherein M, N, and L are integers, andwherein the M frequency subbands include at least a subset of the L frequency subbands.
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Accused Products
Abstract
Techniques for efficiently transmitting various types of signaling on the forward and reverse links in an OFDM-based system are described. Instead of specifically allocating subbands to individual signaling channels, signaling data for a signaling channel on a given link is sent as “underlay” to other transmissions that may be sent on the same link. Each wireless terminal is assigned a different PN code. The signaling data for each terminal is spectrally spread over all or a portion of the system bandwidth using the assigned PN code. For the reverse link, a wireless terminal may transmit signaling on all N usable subbands and may transmit traffic data on L subbands assigned for data transmission, which may be a subset of the N usable subbands. For the forward link, a base station may transmit signaling and traffic data for all terminals on the N usable subbands.
52 Citations
54 Claims
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1. An apparatus for use in a wireless communication system, comprising:
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a modulating component configured to select M frequency subbands for transmission of signaling data from N frequency subbands available for transmission, and to select L frequency subbands for transmission of data symbols from the N frequency subbands, wherein M, N, and L are integers, and wherein the M frequency subbands include at least a subset of the L frequency subbands. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for allocating signaling and data on a system bandwidth, comprising:
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allocating L frequency subbands selected from N available frequency subbands for transmission of data symbols, where L and N are integers; and allocating M frequency subbands selected from the N available frequency subbands for transmission of signaling data, where M is an integer and wherein the M frequency subbands include at least a subset of the L frequency subbands. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A system for transmitting signaling data and data symbols, comprising:
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means for transmitting data symbols over L frequency subbands selected from N available frequency subbands, where L and N are integers; and means for transmitting signaling data over M frequency subbands selected from the N available frequency subbands, where M is an integer and wherein the M frequency subbands include at least a subset of the L frequency subbands. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43)
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44. A computer-readable medium having stored thereon computer-executable instructions for:
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allocating L frequency subbands selected from N available frequency subbands for transmission of data symbols, where L and N are integers; and allocating M frequency subbands selected from the N available frequency subbands for transmission of signaling data, where M is an integer and wherein the M frequency subbands include at least a subset of the L frequency subbands. - View Dependent Claims (45, 46, 47, 48, 49)
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50. An apparatus in a wireless communication, comprising:
a demodulator configured to recover signaling data received on M frequency subbands of N usable subbands of a received signal and to recover data symbols received on L frequency subbands of the N usable subbands, wherein the M frequency subbands include at least a subset of the L frequency subbands. - View Dependent Claims (51, 52, 53, 54)
Specification