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Inserting virtual carrier in conventional OFDM host carrier in communications system

  • US 10,721,050 B2
  • Filed: 02/13/2017
  • Issued: 07/21/2020
  • Est. Priority Date: 02/04/2011
  • Status: Active Grant
First Claim
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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 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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