Inserting virtual carrier in conventional OFDM host carrier in communications system
First Claim
1. A base station for communicating data to and from a plurality of mobile terminals over a plurality of OFDM sub-carriers within a coverage area provided by the base station, the base station comprising:
- circuitry configured toallocate transmission resources provided by a first group of the plurality of OFDM sub-carriers within first frequency resources to mobile terminals of a first type;
allocate transmission resources provided by a second group of the plurality of OFDM sub-carriers within second frequency resources to terminals of a second type, the second group being smaller than the first group and the second frequency resources being selected from within the first frequency resources;
transmit control information comprising resource allocation information for the terminals of the first type with a first plurality of first OFDM symbols over a first bandwidth corresponding to the combined first and second groups of OFDM sub-carriers;
transmit control information comprising resource allocation information for terminals of the second type with a second plurality of OFDM symbols over a second bandwidth corresponding to the second group of OFDM sub-carriers; and
transmit payload data for the terminals of the second type with a third plurality of OFDM symbols over the second bandwidth, the third plurality of OFDM symbols being located between the first plurality of OFDM symbols and the second plurality of OFDM symbols.
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Accused Products
Abstract
A base station communicating data to/from plural mobile terminals over plural OFDM sub-carriers within a coverage area. The base station allocates transmission resources provided by a first group of the plural OFDM sub-carriers within a first frequency band to mobile terminals of a first type and allocates transmission resources provided by a second group of the plural OFDM sub-carriers within a second frequency band to terminals of a second type, the second group being smaller than the first group and the second frequency band selected from within the first frequency band. The base station transmits control information including resource allocation information for terminals of the first type over a first bandwidth corresponding to the combined first and second groups of OFDM sub-carriers and transmits control information including resource allocation information for terminals of the second type over a second bandwidth corresponding to the second group of OFDM sub-carriers.
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Citations
19 Claims
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1. A base station for communicating data to and from a plurality of mobile terminals over a plurality of OFDM sub-carriers within a coverage area provided by the base station, the base station comprising:
circuitry configured to allocate transmission resources provided by a first group of the plurality of OFDM sub-carriers within first frequency resources to mobile terminals of a first type; allocate transmission resources provided by a second group of the plurality of OFDM sub-carriers within second frequency resources to terminals of a second type, the second group being smaller than the first group and the second frequency resources being selected from within the first frequency resources; transmit control information comprising resource allocation information for the terminals of the first type with a first plurality of first OFDM symbols over a first bandwidth corresponding to the combined first and second groups of OFDM sub-carriers; transmit control information comprising resource allocation information for terminals of the second type with a second plurality of OFDM symbols over a second bandwidth corresponding to the second group of OFDM sub-carriers; and transmit payload data for the terminals of the second type with a third plurality of OFDM symbols over the second bandwidth, the third plurality of OFDM symbols being located between the first plurality of OFDM symbols and the second plurality of OFDM symbols. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus for communicating data to and from a plurality of mobile terminals over a plurality of OFDM sub-carriers within a coverage area, the apparatus comprising:
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means for allocating transmission resources provided by a first group of the plurality of OFDM sub-carriers within first frequency resources to mobile terminals of a first type and for allocating transmission resources provided by a second group of the plurality of OFDM sub-carriers within second frequency resources to terminals of a second type, the second group being smaller than the first group and the second frequency resources being selected from within the first frequency resources; and means for transmitting control information comprising resource allocation information for the terminals of the first type with a first plurality of OFDM symbols over a first bandwidth corresponding to the combined first and second groups of OFDM sub-carriers, transmitting control information comprising resource allocation information for terminals of the second type with a second plurality of OFDM symbols over a second bandwidth corresponding to the second group of OFDM sub-carriers, and transmitting payload data for the terminals of the second type with a third plurality of OFDM symbols over the second bandwidth, the third plurality of OFDM symbols being located between the first plurality of OFDM symbols and the second plurality of OFDM symbols.
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19. A method performed by a base station for communicating data to and from a plurality of mobile terminals over a plurality of OFDM sub-carriers within a coverage area provided by the base station, the method comprising:
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allocating transmission resources provided by a first group of the plurality of OFDM sub-carriers within first frequency resources to mobile terminals of a first type; allocating transmission resources provided by a second group of the plurality of OFDM sub-carriers within second frequency resources to terminals of a second type, the second group being smaller than the first group and the second frequency resources being selected from within the first frequency resources; transmitting control information comprising resource allocation information for the terminals of the first type with a first plurality of first OFDM symbols over a first bandwidth corresponding to the combined first and second groups of OFDM sub-carriers; transmitting control information comprising resource allocation information for terminals of the second type with a second plurality of OFDM symbols over a second bandwidth corresponding to the second group of OFDM sub-carriers; and transmitting payload data for the terminals of the second type with a third plurality of OFDM symbols over the second bandwidth, the third plurality of OFDM symbols being located between the first plurality of OFDM symbols and the second plurality of OFDM symbols.
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Specification