PERFORMING RANDOM ACCESS IN CARRIER AGGREGATION
First Claim
1. A method performed by a user equipment ‘
- UE’
, the method comprising;
transmitting from the ‘
UE’
a random access preamble to a secondary access device of a second carrier, the UE being served by a primary access device and the secondary access device, and the UE configured to attempt a total number of blind decoding attempts for decoding physical downlink control channel ‘
PDCCH’
candidates of a UE-specific search space of the second carrier; and
performing a first blind decoding of first PDCCH candidates of the common search space of the second carrier;
performing a second blind decoding of second PDCCH candidates of the UE specific search space of the second carrier,wherein a number of blind decoding attempts for the first and second blind decodings is less than or equal to the configured total number of blind decoding attempts.
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0 Petitions
Accused Products
Abstract
Systems, apparatus and methods can be implemented for performing random access in carrier aggregation. A user equipment (UE) can transmit a random access preamble to a secondary access device of a second carrier, where the UE is served by both a primary access device and the secondary access device, and the UE is configured to attempt a total number of blind decoding attempts for decoding physical downlink control channel candidates of a UE-specific search space of the second carrier. The UE can perform a first blind decoding of first PDCCH candidates of the common search space of the second carrier, and perform a second blind decoding of second PDCCH candidates of the UE specific search space of the second carrier. A number of blind decoding attempts for the first and second blind decodings is less than or equal to the configured total number of blind decoding attempts.
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Citations
40 Claims
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1. A method performed by a user equipment ‘
- UE’
, the method comprising;transmitting from the ‘
UE’
a random access preamble to a secondary access device of a second carrier, the UE being served by a primary access device and the secondary access device, and the UE configured to attempt a total number of blind decoding attempts for decoding physical downlink control channel ‘
PDCCH’
candidates of a UE-specific search space of the second carrier; andperforming a first blind decoding of first PDCCH candidates of the common search space of the second carrier; performing a second blind decoding of second PDCCH candidates of the UE specific search space of the second carrier, wherein a number of blind decoding attempts for the first and second blind decodings is less than or equal to the configured total number of blind decoding attempts. - View Dependent Claims (2, 3, 4, 5, 7, 8)
- UE’
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6. The method of 5, wherein blind decoding the first PDCCH candidates is performed by blind decoding at least a subset of the second PDCCH candidates that are not configured by a cell radio network temporary identifier ‘
- C-RNTI’
during the determined time period.
- C-RNTI’
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9. A method performed by a user equipment ‘
- UE’
, the method comprising;transmitting, from the UE, a random access preamble to a secondary access device of a second carrier, the UE being served by both a primary access device and the secondary access device; performing blind decoding, from the secondary access device, of physical downlink control channel ‘
PDCCH’
candidates;identifying data control information ‘
DCI’
based on a radio network temporary identifier ‘
RNTI’
, in a UE specific search space of the second carrier; andidentifying a random access response ‘
RAR’
that is scheduled with the identified DCI. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
- UE’
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18. A method performed by a secondary access device, the method comprising:
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receiving, from a user equipment ‘
UE’
, a random access preamble, the UE being served by both a primary access device and the secondary access device;generating a random access response ‘
RAR’
in response to the received random access preamble; andencoding data control information ‘
DCI’
associated with the generated RAR in physical downlink control channel ‘
PDCCH’
candidates of a UE specific search space of the second carrier based on a radio network temporary identifier ‘
RNTI’
. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A method performed by a user equipment ‘
- UE’
, the method comprising;transmitting, from the UE, a second random access preamble to a secondary access device of a second carrier, the UE being served by both a primary access device and the secondary access device; performing blind decoding, from the primary access device, of physical downlink control channel (PDCCH) candidates of a common search space of the first carrier; identifying DCI based on a radio access radio network temporary identifier ‘
RA-RNTI’
associated with the second carrier based on the blind decoded PDCCH candidates; andidentifying a second random access response ‘
RAR’
based on the identified DCI. - View Dependent Claims (27, 28, 29, 30, 31)
- UE’
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32. A method performed by a primary access device, the method comprising:
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receiving information associated with a second random access preamble transmitted by a UE to a secondary access device of a second carrier, the UE being served by both the primary access device of a first carrier and the secondary access device; generating a random access response ‘
RAR’
in response to the received information; andencoding data control information ‘
DCI’
associated with the generated RAR in physical downlink control channel ‘
PDCCH’
candidates of a common specific search space of the first carrier based on a random access radio network temporary identifier (RA-RNTI). - View Dependent Claims (33, 34, 35, 36, 37)
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38. (canceled)
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39. (canceled)
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40. (canceled)
Specification