Method for searching for enhanced physical downlink control channel region
First Claim
1. A method for searching for an Enhanced Physical Downlink Control Channel (E-PDCCH) in a wireless access system, the method comprising;
- searching for a legacy Physical Downlink Control Channel (PDCCH) by blind-decoding a control channel region; and
searching for the E-PDCCH based on the detected legacy PDCCH,wherein a position of the E-PDCCH is determined as a function of a position of the legacy PDCCH and the E-PDCCH is searched based on the position of the legacy PDCCH without an additional search operation,wherein if the legacy PDCCH and E-PDCCH are allocated in a subframe, the legacy PDCCH always occupies all of first, second, and third symbols of the subframe,andwherein the position of the legacy E-PDCCH is defined by a starting position of the legacy PDCCH, an ending position of the legacy PDCCH and a size of the legacy PDCCH.
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Abstract
The present invention relates to methods for searching an enhanced physical downlink control channel (E-PDCCH), and a device for supporting the methods. According to one embodiment of the present invention, a method for searching an enhanced physical downlink control channel (E-PDCCH) in a wireless access system can comprise the steps of: performing a blind decoding on a control channel region and searching a legacy physical downlink control channel (PDCCH); and searching the E-PDCCH on the basis of the searched legacy PDCCH. In this case, in a subframe to which the E-PDCCH is allocated, using all symbols of the subframe from a first symbol to a third symbol is always preferred for allocation of the legacy PDCCH.
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Citations
14 Claims
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1. A method for searching for an Enhanced Physical Downlink Control Channel (E-PDCCH) in a wireless access system, the method comprising;
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searching for a legacy Physical Downlink Control Channel (PDCCH) by blind-decoding a control channel region; and searching for the E-PDCCH based on the detected legacy PDCCH, wherein a position of the E-PDCCH is determined as a function of a position of the legacy PDCCH and the E-PDCCH is searched based on the position of the legacy PDCCH without an additional search operation, wherein if the legacy PDCCH and E-PDCCH are allocated in a subframe, the legacy PDCCH always occupies all of first, second, and third symbols of the subframe, and wherein the position of the legacy E-PDCCH is defined by a starting position of the legacy PDCCH, an ending position of the legacy PDCCH and a size of the legacy PDCCH. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A User Equipment (UE) for searching for an Enhanced Physical Downlink Control Channel (E-PDCCH) in a wireless access system, the UE comprising;
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a transmission module; a reception module; and a processor configured to control the transmission module and reception module, wherein the processor is further configured to; search for a legacy Physical Downlink Control Channel (PDCCH) by blind-decoding a control channel region, and search for the E-PDCCH based on the detected legacy PDCCH, wherein a position of the E-PDCCH is determined as a function of a position of the legacy PDCCH and the E-PDCCH is searched based on the position of the legacy PDCCH without an additional search operation, wherein if the legacy PDCCH and E-PDCCH are allocated in a subframe, the legacy PDCCH always occupies all of first, second, and third symbols of the subframe, and wherein the position of the legacy E-PDCCH is defined by a starting position of the legacy PDCCH, an ending position of the legacy PDCCH and a size of the legacy PDCCH. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification