Method and apparatus for monitoring control channel in unlicensed band
AssigneeLG Electronics Inc.
InventorsJoonkui Ahn, Kijun Kim, Suckchel Yang, Hanjun Park, Seonwook Kim
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Abstract
Provided are a method for monitoring a control channel in an unlicensed band and an apparatus using the same. In an unlicensed cell, a user equipment (UE) monitors a physical downlink control channel (PDCCH) having burst control information in a search space defined in a control region of a subframe. The control region comprises a plurality of control channel elements (CCEs) starting from an index 0, and the search space is defined only in, from among the plurality of CCEs, first four CCEs and first eight CCEs.
Claims13
1-10. (canceled)
A method for a wireless communication system, the method comprising:
- detecting, by a user equipment (UE), a physical downlink control channel (PDCCH) in a search space of a first subframe of a licensed-assisted access (LAA) secondary cell;
- and
- acquiring control information based on the detected PDCCH, the control information that includes information on a subframe configuration for the first subframe and a second subframe of the LAA secondary cell, the second subframe being a next subframe of the first subframe,
- wherein the first subframe includes a plurality of control channel elements (CCEs), and
- wherein the search space is defined in a single PDCCH candidate given by first N CCEs from the plurality of CCEs in the first subframe at each aggregation level, where N denotes an aggregation level.
An apparatus for a wireless communication system, the apparatus comprising:
- a processor;
- and
- a memory operatively coupled with the processor and storing instructions that when executed by the processor cause the apparatus to:
- detect a physical downlink control channel (PDCCH) in a search space of a first subframe of a licensed-assisted access (LAA) secondary cell;
- and
- acquire control information based on the detected PDCCH, the control information that includes information on a subframe configuration for the first subframe and a second subframe of the LAA secondary cell, the second subframe being a next subframe of the first subframe,
- wherein the first subframe includes a plurality of control channel elements (CCEs), and
- wherein the search space is defined in a single PDCCH candidate given by first N CCEs from the plurality of CCEs in the first subframe at each aggregation level, where N denotes an aggregation level.
Dependencies are inferred from the claim text.