Multi-carrier communications with adaptive cluster configuration and switching
First Claim
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1. A method for use in allocating subcarriers in an OFDMA system comprising allocating at least one diversity cluster of subcarriers to a first subscriber;
- and allocating at least one coherence cluster to a second subscriber.
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Abstract
A method and apparatus for allocating subcarriers in an orthogonal frequency division multiple access (OFDMA) system is described. In one embodiment, the method comprises allocating at least one diversity cluster of subcarriers to a first subscriber and allocating at least one coherence cluster to a second subscriber.
219 Citations
47 Claims
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1. A method for use in allocating subcarriers in an OFDMA system comprising
allocating at least one diversity cluster of subcarriers to a first subscriber; - and
allocating at least one coherence cluster to a second subscriber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for use in allocating subcarriers in an OFDMA system comprising
determining whether a subscriber is mobile or fixed; -
allocating at least one diversity cluster of subcarriers to the subscriber if the subscriber is determined to be mobile; and
allocating at least one coherence cluster of subcarriers to the subscriber if the subscriber is determined to be fixed. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47)
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26. An apparatus comprising:
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a subscriber;
a base station including a subcarrier allocator, the base station being communicatively coupled to the subscriber;
a variation detector to detect channel variation, wherein the subcarrier allocator allocates either one or more diversity clusters of subcarriers or one or more coherence clusters of subcarriers to the subscriber based on results of channel variation detection by the variation detector.
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34. An apparatus for use in allocating subcarriers in an OFDMA system, the apparatus comprising
means for determining whether a subscriber is mobile or fixed; -
means for allocating at least one diversity cluster of subcarriers to the subscriber if the subscriber is determined to be mobile; and
means for allocating at least one coherence cluster of subcarriers to the subscriber if the subscriber is determined to be fixed.
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Specification