Blind_JJ decoding_NN1 and_CC Search_VV0 Spaces_NN2 for_IF Carrier_NN1 Aggregation_NN1 1_MC1 Introduction_NN1 This_DD1 document_NN1 discusses_VVZ the_AT following_JJ aspects_NN2 -_- UE_NP1 specific_JJ search_NN1 space_NN1 (_( UESS_NP1 )_) design_NN1 for_IF Carrier_NN1 Aggregation_NN1 (_( CA_NP1 )_) in_II presence_NN1 of_IO cross-carrier_JJ scheduling_NN1 with_IW CIF._NP1 -_- Number_NN1 of_IO Blind_JJ Decodes_NN2 (_( BDs_NP1 )_) required_VVN for_IF various_JJ CA_NP1 scenarios_NN2 ._. 
Initial_JJ search_NN1 space_NN1 blocking_NN1 simulations_NN2 shown_VVN here_RL indicate_VV0 that_CST for_IF cross_NN1 carrier_NN1 scheduling_NN1 ,_, the_AT CCE_NN1 aggregation_NN1 levels_NN2 1_MC1 and_CC 2_MC in_II UE_NP1 specific_JJ search_NN1 spaces_NN2 can_VM be_VBI made_VVN smaller_JJR than_CSN those_DD2 used_VVN for_IF Release_NN1 8_MC without_IW significant_JJ increase_NN1 in_II blocking_JJ probability_NN1 ._. 
Blind_JJ Decoding_JJ analysis_NN1 in_II the_AT document_NN1 shows_VVZ that_CST 60_MC BDs_NP1 per_II carrier_NN1 should_VM be_VBI provisioned_VVN to_TO support_VVI Release_NN1 10_MC features_NN2 like_II CA_NP1 ,_, UL_NP1 MIMO_NP1 ,_, non_FU contiguous_JJ PUSCH_NN1 allocation_NN1 and_CC any_DD future_JJ UL_NN1 transmission_NN1 modes_NN2 ._. 
Only_RR 48_MC BDs_NP1 per_II carrier_NN1 without_IW CSS_NP1 2_MC Discussion_NN1 2.1_MC Search_NN1 Space_NN1 Configuration_NN1 with_IW CIF_NN1 When_CS CIF_NP1 is_VBZ configured_VVN on_II a_AT1 particular_JJ CC_NP1 ,_, the_AT UESS_NN1 search_NN1 locations_NN2 in_II that_DD1 CC_NP1 have_VH0 to_TO be_VBI increased_VVN beyond_II Rel8_FO to_TO accommodate_VVI additional_JJ PDCCHs_NP1 that_DD1 schedule_NN1 resource_NN1 assignments/grants_NN2 for_IF cross-scheduled_JJ CC(s)_NP1 ._. 
Figure_VV0 1_MC1 shows_VVZ an_AT1 example_NN1 ._. 
As_CSA shown_VVN in_II the_AT figure_NN1 ,_, new_JJ CCE_NN1 candidate_NN1 locations_NN2 can_VM be_VBI added_VVN to_II existing_JJ Rel8_FO locations_NN2 for_IF each_DD1 aggregation_NN1 level_NN1 ._. 
UE_NP1 can_VM determine_VVI the_AT starting_NN1 location_NN1 of_IO new_JJ CCE_NN1 locations_NN2 by_II adding_VVG an_AT1 offset_NN1 to_II the_AT starting_NN1 locations_NN2 determined_VVN for_IF each_DD1 additional_JJ CC_NP1 ._. 
In_BCL21 order_BCL22 to_TO reduce_VVI blind_JJ decoding_NN1 overhead_RL at_II the_AT UE_NP1 the_AT number_NN1 of_IO new_JJ CCE_NN1 locations_NN2 added_VVN can_VM be_VBI smaller_JJR than_CSN that_DD1 used_JJ for_IF Rel8_FO for_IF some_DD aggregation_NN1 levels_NN2 ._. 
For_REX21 example_REX22 ,_, the_AT figure_NN1 shows_NN2 (_( 3_MC ,_, 3_MC ,_, 2_MC ,_, 2_MC ,_, )_) new_JJ locations_NN2 are_VBR added_VVN for_IF aggregation_NN1 levels_NN2 (_( 1_MC1 ,_, 2_MC ,_, 4_MC ,_, 8_MC )_) respectively_RR ._. 
If_CS DCI_MC format_NN1 sizes_NN2 corresponding_VVG to_II grants/assignments_NN2 of_IO CC1_FO and_CC CC2_FO are_VBR different_JJ then_JJ in_BCL21 order_BCL22 to_TO keep_VVI the_AT number_NN1 of_IO blind_JJ decodes_NN2 low_RR ,_, it_PPH1 is_VBZ desirable_JJ to_TO restrict_VVI the_AT UE_NP1 to_TO search_VVI for_IF separate_JJ DCI_MC sizes_NN2 in_II Rel8_FO and_CC extended_JJ search_NN1 space_NN1 locations_NN2 ._. 
In_II the_AT example_NN1 shown_VVN in_II Figure_NN1 1_MC1 ,_, UE_NP1 monitors_VVZ the_AT Rel8_FO UESS_VV0 for_IF grants/assignments_NN2 corresponding_VVG to_II CC1_FO in_II and_CC the_AT extended_JJ UESS_NN1 for_IF grants/assignments_NN2 corresponding_VVG to_II CC2_FO ._. 
Figure_VV0 1_MC1 --_JJ Increasing_JJ Search_NN1 Space_NN1 beyond_II Rel8_FO (_( Separate_VV0 )_) Under_II some_DD special_JJ circumstances_NN2 ,_, a_AT1 UE_NP1 may_VM be_VBI configured_VVN to_TO receive_VVI grants/assignments_NN2 of_IO the_AT same_DA DCI_MC size_NN1 for_IF both_DB2 CC1_FO and_CC CC2_FO ._. 
This_DD1 can_VM occur_VVI when_RRQ the_AT bandwidth_NN1 of_IO CC1_FO and_CC CC2_FO is_VBZ same_DA (_( DCI_MC 0/1A_FU will_VM have_VHI same_DA size_NN1 for_IF CC1_FO andCC2_FO )_) and_CC when_CS the_AT UL_NN1 and_CC DL_MC transmission_NN1 modes_NN2 for_IF both_DB2 CC1_FO and_CC CC2_FO are_VBR same_DA (_( all_DB DCI_MC 's_VBZ received_VVN will_VM also_RR have_VHI same_DA size_NN1 for_IF CC1_FO and_CC CC2_FO )_) ._. 
For_IF these_DD2 cases_NN2 ,_, it_PPH1 is_VBZ possible_JJ for_IF the_AT UE_NP1 monitor_VV0 both_RR the_AT Rel8_FO UESS_NN1 and_CC extended_VVD UESS_NP1 without_IW increasing_VVG the_AT number_NN1 of_IO Blind_JJ decodes_NN2 compared_VVN to_II separate_JJ search_NN1 space_NN1 design_NN1 shown_VVN in_II Figure_NN1 1_MC1 ._. 
Figure_NN1 2_MC shows_VVZ an_AT1 example_NN1 where_CS the_AT search_NN1 spaces_NN2 are_VBR shared_VVN ._. 
Figure_NN1 2_MC --_JJ Increasing_JJ Search_NN1 Space_NN1 beyond_II Rel8_FO (_( Shared_JJ )_) Figure_NN1 3_MC shows_VVZ blocking_JJ performance_NN1 for_IF various_JJ PDCCH_NP1 loading_NN1 scenarios_NN2 and_CC search_NN1 space_NN1 configurations_NN2 ._. 
Blocking_JJ performance_NN1 for_IF Rel8_FO (_( i.e._REX ,_, scheduling_VVG only_RR for_IF same_DA CC_NP1 )_) is_VBZ shown_VVN with_IW heavy_JJ (_( Rel8-H_NP1 ,_, up_RG21 to_RG22 18_MC PDCCHs_NP1 )_) and_CC light_JJ loading_NN1 (_( Rel8-L_NP1 ,_, up_RG21 to_RG22 10_MC PDCCHs_NP1 )_) ._. 
To_TO support_VVI CA_NP1 with_IW CIF_NP1 ,_, extra_JJ PDCCHs_NP1 corresponding_VVG to_II other_JJ CCs_NP1 have_VH0 to_TO be_VBI scheduled_VVN in_II31 addition_II32 to_II33 those_DD2 for_IF the_AT same_DA CC_NP1 ._. 
Blocking_JJ statistics_NN are_VBR generated_VVN for_IF scheduling_VVG 4_MC additional_JJ PDCCHs_NP1 (_( to_TO account_VVI for_IF 1_MC1 additional_JJ UE_NP1 doing_VDG CA_NP1 requiring_VVG 1DL_FO and_CC 1UL_FO PDCCH_NP1 each_DD1 for_IF CC1_FO and_CC CC2_FO )_) ,_, 8_MC ,_, 12_MC and_CC 16_MC additional_JJ PDCCHs_NP1 ._. 
Results_NN2 shown_VVN in_II the_AT figure_NN1 are_VBR averaged_VVN across_II various_JJ aggregation_NN1 levels_NN2 ._. 
Detailed_JJ simulation_NN1 results_NN2 for_IF each_DD1 aggregation_NN1 level_NN1 ,_, additional_JJ statistics_NN and_CC simulation_NN1 details_NN2 are_VBR provided_VVN in_II Annex_NN1 A._NP1 Table_NN1 1_MC1 explains_VVZ the_AT search_NN1 space_NN1 configurations_NN2 shown_VVN in_II Figure_NN1 3_MC ._. 
Figure_NN1 4_MC shows_VVZ probability_NN1 of_IO blocking_VVG for_IF 2_MC consecutive_JJ subframes_NN2 ._. 
Results_NN2 shown_VVN in_II Figures_NN2 3_MC and_CC 4_MC indicate_VV0 that_CST extending_VVG UESS_NP1 provides_VVZ more_DAR benefit_NN1 whenever_RRQV the_AT combined_JJ Rel8+Extended_FO UESS_NN1 is_VBZ shared_VVN ._. 
Search_NN1 Space_NN1 Configuration_NN1 Explanation_NN1 No_AT Extended_JJ UESS_NN1 Both_RR CC1_FO and_CC CC2_FO can_VM be_VBI scheduled_VVN in_II Rel8_FO UESS_NP1 (_( 6_MC ,_, 6_MC ,_, 2_MC ,_, 2_MC )_) ._. 
Extended_VVD UESS_NP1 (_( Separate_VV0 )_) CC1_FO can_VM be_VBI scheduled_VVN in_II Rel8_FO UESS_NP1 (_( 6_MC ,_, 6_MC ,_, 6_MC ,_, 2_MC )_) ,_, CC2_FO can_VM be_VBI scheduled_VVN in_II Extended_JJ UESS_NN1 (_( 6_MC ,_, 6_MC ,_, 2_MC ,_, 2_MC )_) Extended_VVD UESS_NP1 (_( Shared_JJ )_) Both_DB2 CC1_FO and_CC CC2_FO can_VM be_VBI scheduled_VVN in_II either_RR Rel8_FO or_CC Extended_VVD UESS_NP1 (_( 6_MC ,_, 6_MC ,_, 2_MC ,_, 2_MC )_) +_FO (_( 6_MC ,_, 6_MC ,_, 6_MC ,_, 2_MC )_) ._. 
(_( Assuming_VVG same_DA transmission_NN1 mode_NN1 and_CC bandwidth_NN1 for_IF CC1_FO and_CC CC2_FO )_) Table_NN1 1_MC1 --_JJ Explanation_NN1 of_IO Different_JJ Search_NN1 Space_NN1 Configurations_NN2 for_IF Figure_NN1 3_MC Figure_NN1 3_MC --_JJ Blocking_JJ Performance_NN1 of_IO Different_JJ Search_NN1 Space_NN1 Configurations_NN2 (_( Blocking_VVG in_II 1_MC1 subframe_NN1 )_) Figure_NN1 4_MC --_JJ Blocking_JJ Performance_NN1 of_IO Different_JJ Search_NN1 Space_NN1 Configurations_NN2 (_( Blocking_VVG in_II 2_MC consecutive_JJ subframes_NN2 )_) 2.1.1_MC Impact_NN1 of_IO Extended_JJ UESS_NN1 Size_NN1 on_II Blocking_JJ Figures_NN2 5a_FO and_CC 5b_FO compare_VV0 blocking_JJ performance_NN1 between_II extending_VVG UESS_NN1 beyond_II Rel8_FO by_II (_( 6,6,2,2_MC )_) additional_JJ CCE_NN1 locations_NN2 vs._II (_( 3,3,2,2_MC )_) additional_JJ locations_NN2 for_IF aggregation_NN1 levels_NN2 (_( 1,2,4,8_MC )_) respectively_RR ._. 
Results_NN2 indicate_VV0 extending_VVG the_AT UESS_NN1 size_NN1 by_II (_( 3,3,2,2_MC )_) is_VBZ only_RR marginally_RR worse_JJR in_II31 terms_II32 of_II33 blocking_JJ performance_NN1 compared_VVN to_II (_( 6,6,2,2_MC )_) ._. 
It_PPH1 should_VM be_VBI noted_VVN that_CST blind_JJ decoding_NN1 for_IF (_( 3,3,2,2_MC )_) is_VBZ considerably_RR reduced_VVN compared_VVN to_II (_( 6,6,2,2_MC )_) ._. 
Consecutive_JJ subframe_NN1 blocking_NN1 given_VVN in_II Figures_NN2 6a_FO and_CC 6b_FO show_VV0 the_AT same_DA trend_NN1 ._. 
Figure_NN1 5a_FO --_JJ Impact_NN1 of_IO Extended_JJ UESS_NN1 Size_NN1 on_II PDCCH_NP1 blocking_NN1 (_( Separate_VV0 )_) Figure_NN1 5b_FO --_JJ Impact_NN1 of_IO Extended_JJ UESS_NN1 Size_NN1 on_II PDCCH_NP1 blocking_NN1 (_( Shared_JJ )_) Figure_NN1 6a_FO --_JJ Impact_NN1 of_IO Extended_JJ UESS_NN1 Size_NN1 on_II consecutive_JJ PDCCH_NP1 blocking_NN1 (_( Separate_VV0 )_) Figure_NN1 6b_FO --_JJ Impact_NN1 of_IO Extended_JJ UESS_NN1 Size_NN1 on_II consecutive_JJ PDCCH_NP1 blocking_NN1 (_( Shared_JJ )_) 2.2_MC Blind_JJ Decoding_NN1 In_II Release_NN1 8_MC ,_, a_AT1 UE_NP1 needs_VVZ to_TO perform_VVI up_II21 to_II22 a_AT1 maximum_NN1 of_IO 44_MC blind_JJ decodes_NN2 (_( BD_NP1 )_) over_II the_AT CSS_NP1 and_CC UESS_NP1 ._. 
Only_RR a_AT1 single_JJ UL_NN1 transmission_NN1 mode_NN1 is_VBZ supported_VVN with_IW DCI_MC format_NN1 0_MC ._. 
The_AT Release_NN1 8_MC BDs_NP1 and_CC associated_VVN DCI_MC Formats_NN2 in_II the_AT various_JJ search_NN1 spaces_NN2 are_VBR shown_VVN below._RG 44_MC BD_NP1 --_JJ Release_NN1 8_MC --_NN1 one_MC1 UL_NN1 transmission_NN1 mode_NN1 CSS_NP1 :_: 6BD_FO --_JJ 0/1A/3/3A_FU ,_, 6BD_FO --_NN1 1C_FO UESS_NP1 :_: 16BD_FO --_JJ 0/1A_FU ,_, 16BD_FO --_NN1 1,1B,1D,2,2A_FO (_( DL_MC )_) --_JJ multiple_NN1 DL_MC DCI_MC formats_NN2 Increasing_VVG the_AT maximum_JJ number_NN1 of_IO BD_NP1 to_II 60_MC allows_VVZ for_IF new_JJ UL_NN1 transmission_NN1 modes_NN2 for_IF Release_NN1 10_MC and_CC beyond_RL ._. 
A_AT1 Release_NN1 10_MC and_CC beyond_II UE_NP1 shall_VM be_VBI capable_JJ of_IO performing_VVG 60_MC BD_NP1 on_II at_RR21 least_RR22 one_MC1 of_IO its_APPGE active_JJ Release10_FO component_NN1 carriers_NN2 ._. 
The_AT sixteen_MC additional_JJ blind_JJ decodes_NN2 to_TO support_VVI the_AT new_JJ UL_NN1 transmission_NN1 modes_NN2 in_II Release_NN1 10_MC are_VBR shown_VVN below_RL in_II blue_JJ (_( See_VV0 &lsqb;_( 3_MC &rsqb;_) for_IF terminology_NN1 regarding_II the_AT new_JJ UL_NN1 DCI_MC Formats_NN2 01,01B_FO )_) ._. 
60_MC BD_NP1 --_JJ Release_NN1 10_MC ,_, 1CC_NNU multiple_JJ UL_NN1 transmission_NN1 modes_NN2 CSS_NP1 :_: 6BD_FO --_JJ 0/1A/3/3A_FU ,_, 6BD_FO --_NN1 1C_FO UESS_NP1 :_: 16BD_FO --_JJ 0/1A_FU ,_, 16BD_FO --_NN1 1,1B,1D,2,2A_FO (_( DL_MC )_) 16BD_FO --_NN1 01,01B,02,02A_FO (_( UL_NP1 )_) For_IF carrier_NN1 aggregation_NN1 it_PPH1 is_VBZ possible_JJ to_TO reduce_VVI total_JJ BD_NP1 by_II assigning_VVG only_RR a_AT1 single_JJ CSS_NP1 per_II UE_NP1 and_CC relying_VVG on_II RRC_NP1 signaling_VVG for_IF communicating_VVG other_JJ component_NN1 carrier_NN1 system_NN1 information_NN1 ._. 
Carrier_NN1 aggregation_NN1 with_IW per_II CC_NP1 UESS_NP1 and_CC 1_MC1 CSS_NP1 --_NN1 #total_FO BD_NP1 =_FO #CC_FO x_ZZ1 (_( 60-12_MCMC )_) +_FO 12_MC 108_MC BD_NP1 (_( CC1:60BD_FO ,_, CC2:48BD_FO )_) --_NN1 CA_VM ,_, 2CCs_FO ,_, No_AT cross-carrier_JJ scheduling_NN1 CSS_NP1 :_: 6BD_FO --_JJ 0/1A/3/3A_FU ,_, 6BD_FO --_NN1 
