Segment sensitive scheduling
First Claim
1. An apparatus for channel sensitive scheduling in a communication system including a plurality of sub-carriers spanning an operating frequency band, the apparatus comprising:
- a receiver module configured to receive a reverse link pilot signal and at least one channel characteristic reporting message; and
a scheduler coupled to the receiver module and configured to determine, based on the reverse link pilot signal, a channel characteristic corresponding to each of a plurality of segments spanning the operating frequency band, each of the segments having a bandwidth less than a total bandwidth, the scheduler configured to determine a reverse link resource assignment based on the channel characteristics and further configured to determine a forward link resource assignment based on the at least one channel characteristic reporting message.
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Accused Products
Abstract
Systems and methods of scheduling sub-carriers in an OFDMA system in which a scheduler takes into account channel conditions experienced by the communication devices to optimize channel conditions. The scheduler can partition a set of sub-carriers spanning an operating bandwidth into a plurality of segments. The segments can include a plurality of global segments that each includes a distinct non-contiguous subset of the sub-carriers spanning substantially the entire operating bandwidth. One or more of the global segments can be further partitioned into a plurality of local segments that each has a bandwidth that is less than a channel coherence bandwidth. The scheduler determines channel characteristics experienced by each communication device via reporting or channel estimation, and allocates one or more segments to communication links for each device according to the channel characteristics.
769 Citations
28 Claims
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1. An apparatus for channel sensitive scheduling in a communication system including a plurality of sub-carriers spanning an operating frequency band, the apparatus comprising:
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a receiver module configured to receive a reverse link pilot signal and at least one channel characteristic reporting message; and a scheduler coupled to the receiver module and configured to determine, based on the reverse link pilot signal, a channel characteristic corresponding to each of a plurality of segments spanning the operating frequency band, each of the segments having a bandwidth less than a total bandwidth, the scheduler configured to determine a reverse link resource assignment based on the channel characteristics and further configured to determine a forward link resource assignment based on the at least one channel characteristic reporting message. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for channel sensitive scheduling in a communication system including a plurality of sub-carriers spanning an operating frequency band, the apparatus comprising:
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means for determining a channel preference indicative of a preferred segment from a plurality of segments substantially spanning at least a portion of the operating band based upon channel characteristics experienced by a receiver; and means for assigning a subset of sub-carriers within the preferred segment to a particular communication link associated with the channel preference. - View Dependent Claims (7, 8)
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9. A method of reporting channel characteristics in a communication system including a plurality of sub-carriers spanning an operating frequency band, the method comprising:
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receiving a pilot signal; determining a channel characteristic corresponding to each of a plurality of segments spanning the operating band, each segment having a bandwidth less than a coherent channel bandwidth; determining a preferred segment from the plurality of segments; comparing the channel characteristic corresponding to the preferred segment to a reporting threshold; and generating a reporting message based on the preferred segment if the channel characteristic corresponding to the preferred segment exceeds the reporting threshold. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer-readable storage medium storing instructions that when executed by a processor cause the processor to perform instructions for reporting channel characteristics in a communication system including a plurality of sub-carriers spanning an operating frequency band, the instructions comprising:
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receiving a pilot signal; determining a channel characteristic corresponding to each of a plurality of segments spanning the operating band, each segment having a bandwidth less than a coherent channel bandwidth; determining a preferred segment from the plurality of segments; comparing the channel characteristic corresponding to the preferred segment to a reporting threshold; and generating a reporting message based on the preferred segment if the channel characteristic corresponding to the preferred segment exceeds the reporting threshold. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification