Blind decoding method, radio base station, user terminal and radio communication system
First Claim
1. A user terminal that decodes downlink control information transmitted from a radio base station using an enhanced downlink control channel that is frequency-division-multiplexed with a downlink shared data channel, the user terminal comprising:
- a receiver that receives, from the radio base station, information for configuring a number of candidates that is used to configure the user terminal with a number of search space candidates for the enhanced downlink control channel; and
a processor that decodes the downlink control information based on the number of search space candidates for the enhanced downlink control channel that is configured for each aggregation level based on the information for configuring the number of candidates,wherein the enhanced downlink control channel is configured with a frequency resource set including a plurality of PRB (Physical Resource Block) pairs for the enhanced downlink control channel, the number of search space candidates for the enhanced downlink control channel is a number of specific search space candidates for the frequency resource set, and when a plurality of frequency resource sets for the user terminal to monitor are configured in a given cell, numbers of specific search space candidates for the respective frequency resource sets are configured independently and a total number of the specific search space candidates for the respective frequency resource sets at each aggregation level is equal to or less than a total number of specific search space candidates at each aggregation level for Release 10 or earlier versions.
1 Assignment
0 Petitions
Accused Products
Abstract
The blind decoding method disclosed herein is a blind decoding method to allow a user terminal to blind-decode downlink control information that is transmitted from a radio base station using at least one of a legacy PDCCH and an enhanced PDCCH that is frequency-division-multiplexed with a PDSCH, and includes the steps in which the radio base station reports information for configuring a number of candidates, which information is used to configure numbers of search space candidates for the legacy PDCCH and numbers of search space candidates for the enhanced PDCCH, to the user terminal, and the user terminal blind-decodes the downlink control information based on the numbers of search space candidates for the legacy PDCCH and the numbers of search space candidates for the enhanced PDCCH that are configured based on the candidate quantity configuration information.
11 Citations
8 Claims
-
1. A user terminal that decodes downlink control information transmitted from a radio base station using an enhanced downlink control channel that is frequency-division-multiplexed with a downlink shared data channel, the user terminal comprising:
-
a receiver that receives, from the radio base station, information for configuring a number of candidates that is used to configure the user terminal with a number of search space candidates for the enhanced downlink control channel; and a processor that decodes the downlink control information based on the number of search space candidates for the enhanced downlink control channel that is configured for each aggregation level based on the information for configuring the number of candidates, wherein the enhanced downlink control channel is configured with a frequency resource set including a plurality of PRB (Physical Resource Block) pairs for the enhanced downlink control channel, the number of search space candidates for the enhanced downlink control channel is a number of specific search space candidates for the frequency resource set, and when a plurality of frequency resource sets for the user terminal to monitor are configured in a given cell, numbers of specific search space candidates for the respective frequency resource sets are configured independently and a total number of the specific search space candidates for the respective frequency resource sets at each aggregation level is equal to or less than a total number of specific search space candidates at each aggregation level for Release 10 or earlier versions. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A decoding method for a user terminal to decode downlink control information transmitted from a radio base station using an enhanced downlink control channel that is frequency-division-multiplexed with a downlink shared data channel, the decoding method comprising:
-
receiving, from the radio base station, information for configuring a number of candidates that is used to configure the user terminal with a number of search space candidates for the enhanced downlink control channel; and decoding the downlink control information based on the number of search space candidates for the enhanced downlink control channel that is configured for each aggregation level based on the information for configuring the number of candidates, wherein the enhanced downlink control channel is configured with a frequency resource set including a plurality of PRB (Physical Resource Block) pairs for the enhanced downlink control channel, the number of search space candidates for the enhanced downlink control channel is a number of specific search space candidates for the frequency resource set, and when a plurality of frequency resource sets for the user terminal to monitor are configured in a given cell, numbers of specific search space candidates for the respective frequency resource sets are configured independently and a total number of the specific search space candidates for the respective frequency resource sets at each aggregation level is equal to or less than a total number of specific search space candidates at each aggregation level for Release 10 or earlier versions.
-
-
7. A radio base station transmitting downlink control information to a user terminal using an enhanced downlink control channel that is frequency-division-multiplexed with a downlink shared data channel, the radio base station comprising:
-
a processor that generates information for configuring a number of candidates that is used to configure the user terminal with a number of search space candidates for the enhanced downlink control channel for each aggregation level; and a transmitter that transmits to the user terminal the information for configuring the number of candidates generated by the processor, wherein the enhanced downlink control channel is configured with a frequency resource set including a plurality of PRB (Physical Resource Block) pairs for the enhanced downlink control channel, the number of search space candidates for the enhanced downlink control channel is a number of specific search space candidates for the frequency resource set, and when a plurality of frequency resource sets for the user terminal to monitor are configured in a given cell, numbers of specific search space candidates for the respective frequency resource sets are configured independently and a total number of the specific search space candidates for the respective frequency resource sets at each aggregation level is equal to or less than a total number of specific search space candidates at each aggregation level for Release 10 or earlier versions.
-
-
8. A radio communication system comprising:
- a radio base station that transmits downlink control information using an enhanced downlink control channel that is frequency-division-multiplexed with a downlink shared data channel; and
a user terminal that receives the downlink control information from the radio base station,the radio base station comprising; a first processor that generates information for configuring a number of candidates that is used to configure the user terminal with a number of search space candidates for the enhanced downlink control channel for each aggregation level; and a transmitter that transmits to the user terminal the information for configuring the number of candidates generated by the first processor, and the user terminal comprising; a receiver that receives, from the radio base station, the information for configuring the number of candidates that is used to configure the user terminal with the number of search space candidates for the enhanced downlink control channel; and a second processor that decodes the downlink control information based on the number of search space candidates for the enhanced downlink control channel that is configured for each aggregation level based on the information for configuring the number of candidates, and wherein the enhanced downlink control channel is configured with a frequency resource set including a plurality of PRB (Physical Resource Block) pairs for the enhanced downlink control channel, the number of search space candidates for the enhanced downlink control channel is a number of specific search space candidates for the frequency resource set, and when a plurality of frequency resource sets for the user terminal to monitor are configured in a given cell, numbers of specific search space candidates for the respective frequency resource sets are configured independently and a total number of the specific search space candidates for the respective frequency resource sets at each aggregation level is equal to or less than a total number of specific search space candidates at each aggregation level for Release 10 or earlier versions.
- a radio base station that transmits downlink control information using an enhanced downlink control channel that is frequency-division-multiplexed with a downlink shared data channel; and
Specification