Blind decoding for an enhanced physical downlink control channel (EPDCCH)
First Claim
1. A user equipment (UE) configured for blind decoding downlink control information (DCI) from an enhanced physical downlink control channel (EPDCCH), comprising:
- a processor to;
attempt one or more times to decode the DCI from enhanced control channel elements (ECCE) of the EPDCCH from physical resource block (PRB) region candidates in a PRB set using a selected set of enhanced resource element group (EREG) index maps for the ECCE until the DCI is successfully decoded, wherein each EREG index map is configured for a different aggregation level (AL), and the REs of a physical resource block (PRB) pair include a block of complex-valued symbols y(0), . . . , y(Msymb−
1) mapped in sequence starting with y(0) to resource elements (k,l) on an associated antenna port when the REs are part of the EREGS assigned for the EPDCCH transmission, where Msymb is a number of modulation symbols to transmit on a physical channel, and the mapping to resource elements (k,l) on antenna port p is an increasing order of first an index k and then an index l, starting with a first slot and ending with a second slot in a subframe; and
decode the DCI with an EREG index map associated with a same aggregation level used to encode the DCI.
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Accused Products
Abstract
Technology for blind decoding downlink control information (DCI) from an enhanced physical downlink control channel (EPDCCH) is disclosed. In an example, a user equipment (UE) can include a processor configured to: Recursively attempt to decode the DCI from enhanced control channel elements (ECCE) of the EPDCCH from physical resource block (PRB) region candidates in a PRB set using a selected set of enhanced resource element group (EREG) index maps for the ECCE until the DCI is successfully decoded; and decode the DCI with an EREG index map associated with a same aggregation level used to encode the DCI. Each EREG index map can be configured for a different aggregation level (AL).
12 Citations
22 Claims
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1. A user equipment (UE) configured for blind decoding downlink control information (DCI) from an enhanced physical downlink control channel (EPDCCH), comprising:
a processor to; attempt one or more times to decode the DCI from enhanced control channel elements (ECCE) of the EPDCCH from physical resource block (PRB) region candidates in a PRB set using a selected set of enhanced resource element group (EREG) index maps for the ECCE until the DCI is successfully decoded, wherein each EREG index map is configured for a different aggregation level (AL), and the REs of a physical resource block (PRB) pair include a block of complex-valued symbols y(0), . . . , y(Msymb−
1) mapped in sequence starting with y(0) to resource elements (k,l) on an associated antenna port when the REs are part of the EREGS assigned for the EPDCCH transmission, where Msymb is a number of modulation symbols to transmit on a physical channel, and the mapping to resource elements (k,l) on antenna port p is an increasing order of first an index k and then an index l, starting with a first slot and ending with a second slot in a subframe; anddecode the DCI with an EREG index map associated with a same aggregation level used to encode the DCI. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for blind decoding downlink control information (DCI) from an enhanced physical downlink control channel (EPDCCH), comprising:
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receiving the EPDCCH from an evolved Node B (eNB) at a user equipment (UE); attempting one or more times to decode the DCI from enhanced control channel elements (ECCE) of the EPDCCH from a physical resource block (PRB) pair using a selected set of enhanced resource element group (EREG) index mappings for the ECCE until the DCI is successfully decoded, wherein each EREG index mapping is configured for a different aggregation level (AL), and the REs of the PRB pair include a block of complex-valued symbols y(0), . . . , y(Msymb−
1) mapped in sequence starting with y(0) to resource elements (k,l) on an associated antenna port when the REs are part of the EREGS assigned for the EPDCCH transmission, where Msymb is a number of modulation symbols to transmit on a physical channel, and the mapping to resource elements (k,l) on antenna port p is an increasing order of first an index k and then an index l, starting with a first slot and ending with a second slot in a subframe; andcorrectly decoding the DCI when the EREG index mapping associated with a specified aggregation level is used, wherein the specified aggregation level is used to encode the DCI. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A node operable for mapping resource elements (RE) to enhanced control channel elements (ECCE) of an enhanced physical downlink control channel (EPDCCH) based on an aggregation level (AL), having computer circuitry configured to:
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determine a number of ECCE used to transmit downlink control information (DCI); determine the aggregation level used to transmit the DCI based on the number of ECCE used to transmit the DCI; and map resource elements (RE) to enhanced resource element groups (EREG) of the ECCE assigned to the DCI using an EREG index, wherein the EREG index is selected based on a localized EPDCCH transmission scheme or a distributed EPDCCH transmission scheme. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification