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Sending method and apparatus for enhanced physical downlink control channel

  • US 9,942,888 B2
  • Filed: 06/27/2012
  • Issued: 04/10/2018
  • Est. Priority Date: 11/14/2011
  • Status: Active Grant
First Claim
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1. A sending method for enhanced Physical Downlink Control Channel (ePDCCH), comprising:

  • determining, by a base station, a start position of the ePDCCH in a subframe according to at least one of a high-level signaling and a preset rule, wherein the high-level signalling or the preset rule comprises one of;

    (i) if the ePDCCH is only in a second time slot, the start position of the ePDCCH is a first Orthogonal Frequency Division Multiplexing (OFDM) symbol of the second time slot,(ii) if the ePDCCH is only in a first time slot, the start position of the ePDCCH is a same as a start position of a first component carrier of a specific Physical Downlink Shared Channel (PDSCH) for a first User Equipment (UE), wherein the first component carrier is a component carrier where the ePDCCH is and the first UE is a UE corresponding to the ePDCCH,(iii) if the ePDCCH is in the first time slot, the start position of the ePDCCH is obtained according to a first high-level signalling, and(iv) if the ePDCCH is in the first time slot, the start position of the ePDCCH is obtained according to a first high-level signalling when a first predetermined condition is satisfied, and the start position of the ePDCCH is obtained according to a second high level signalling when a second predetermined condition is satisfied; and

    sending, by the base station, a pilot signal for the ePDCCH and data carried on the ePDCCH,wherein the first predetermined condition and the second predetermined condition comprise one of the following;

    the first predetermined condition being that the UE corresponding to the ePDCCH does not perform, in the component carrier where the ePDCCH is, an operation of detecting a control area bearing a physical downlink control channel and the second predetermined condition being that the UE corresponding to the ePDCCH performs, in the component carrier where the ePDCCH is, the operation of detecting the control area bearing the physical downlink control channel,the first predetermined condition being that no control area bearing the physical downlink control channel is on the component carrier where the ePDCCH is and the second predetermined condition being that a control area bearing the physical downlink control channel is on the component carrier where the ePDCCH is, andthe first predetermined condition being that the UE corresponding to the ePDCCH does not perform, in the component carrier where the ePDCCH is, an operation of detecting a physical control format indication channel, and the second predetermined condition being that the UE corresponding to the ePDCCH performs, in the component carrier where the ePDCCH is, the operation of detecting a physical control format indication channel.

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