Physical downlink control channel repetitions in a slot
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment may receive a first physical downlink control channel (PDCCH) repetition of a PDCCH in a slot. The UE may receive a second PDCCH repetition of the PDCCH in the slot. Numerous other aspects are described.
1 . A user equipment (UE) for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to cause the UE to:
receive a first physical downlink control channel (PDCCH) repetition of a PDCCH in a slot, the first PDCCH repetition being located in a first common search space (CSS); and
receive a second PDCCH repetition of the PDCCH in the slot, the second PDCCH repetition being located in a second CSS that is of a same CSS type as the first CSS, wherein the first CSS and the second CSS are linked via a search space linking identifier configured by radio resource control (RRC) signaling.
2 . The UE of claim 1 , wherein:
the one or more processors, to receive the first PDCCH repetition, are configured to receive the first PDCCH repetition from a network entity; and
the one or more processors, to receive the second PDCCH repetition, are configured to receive the second PDCCH repetition from the network entity.
3 . The UE of claim 1 , wherein the first PDCCH repetition is located in a first search space set and the second PDCCH repetition is located in a second search space set.
4 . The UE of claim 1 , wherein the one or more processors are further configured to cause the UE to:
receive an indication of a parameter that identifies a quantity of PDCCH repetitions in the slot, wherein the PDCCH repetitions include the first PDCCH repetition and the second PDCCH repetition.
5 . The UE of claim 1 , wherein an initial symbol of an initial span in the slot is a first reference symbol for PDCCH reception and a final symbol of a final span in the slot is a second reference symbol for the PDCCH reception.
6 . The UE of claim 1 , wherein the one or more processors are further configured to cause the UE to:
receive an indication of one or more parameters that indicate a first location of the first PDCCH repetition in the slot and a second location of the second PDCCH repetition in the slot.
7 . The UE of claim 1 , wherein the slot is configured based on a minimum gap between a symbol of the first PDCCH repetition and a symbol of the second PDCCH repetition and further based on a maximum symbol duration of the first PDCCH repetition and the second PDCCH repetition.
8 . The UE of claim 1 , wherein a quantity of non-overlapping control channel elements associated with the first PDCCH repetition and the second PDCCH repetition is limited on a per-slot basis.
9 . The UE of claim 1 , wherein the slot is configured based on one or more of:
a quantity of search space sets for the slot;
a variable related to a length of search space sets for the slot; or
a symbol index of an initial symbol of the first PDCCH repetition or the second PDCCH repetition for the slot.
10 . The UE of claim 1 , wherein a search space set in which the first PDCCH repetition and the second PDCCH repetition are located is configured for one or more of:
a plurality of cells;
a plurality of network entities configured to operate in a configured carrier frequency; or a serving cell for the UE.
11 . The UE of claim 1 , wherein the one or more processors are further configured to cause the UE to:
receive, in system information, an indication of one or more parameters that indicate a first location of the first PDCCH repetition in the slot and a second location of the second PDCCH repetition in the slot.
12 . The UE of claim 11 , wherein the system information comprises system information block 1 (SIB1).
13 . The UE of claim 1 , wherein a quantity of blind decodes associated with the first PDCCH repetition and the second PDCCH repetition is limited on a per-slot basis.
14 . The UE of claim 1 , wherein the same CSS type comprises Type 0A, Type 1, or Type 2.
15 . The UE of claim 1 , wherein the first and second PDCCH repetitions are associated with a same downlink control information (DCI) format.
16 . The UE of claim 1 , wherein the first PDCCH repetition is located at a span in the slot, and wherein the second PDCCH repetition is located at a span that begins at a symbol following a final symbol of the span of the first PDCCH repetition in the slot.
17 . The UE of claim 1 , wherein the one or more processors are configured to cause the UE to:
perform one PDCCH decoding operation on the slot.
18 . A network entity for wireless communication, comprising:
one or more memories; and
one or more processors, coupled to the one or more memories, configured to cause the network entity to:
output a first physical downlink control channel (PDCCH) repetition of a PDCCH in a slot, the first PDCCH repetition being located in a first common search space (CSS); and
output a second PDCCH repetition of the PDCCH in the slot, the second PDCCH repetition being located in a second CSS that is of a same CSS type as the first CSS, wherein the first CSS and the second CSS are linked via a search space linking identifier configured by radio resource control (RRC) signaling.
19 . The network entity of claim 18 , wherein the first PDCCH repetition is located in a first search space set and the second PDCCH repetition is located in a second search space set.
20 . The network entity of claim 18 , wherein the one or more processors are further configured to cause the network entity to:
output an indication of a parameter that identifies a quantity of PDCCH repetitions in the slot, wherein the PDCCH repetitions include the first PDCCH repetition and the second PDCCH repetition.
21 . The network entity of claim 18 , wherein an initial symbol of an initial span in the slot is a first reference symbol for PDCCH reception and a final symbol of a final span in the slot is a second reference symbol for the PDCCH reception.
22 . The network entity of claim 18 , wherein the one or more processors are further configured to cause the network entity to:
output, in system information, an indication of one or more parameters that indicate a first location of the first PDCCH repetition in the slot and a second location of the second PDCCH repetition in the slot.
23 . The network entity of claim 18 , wherein the slot is configured based on a minimum gap between a symbol of the first PDCCH repetition and a symbol of the second PDCCH repetition and further based on a maximum symbol duration of the first PDCCH repetition and the second PDCCH repetition.
24 . The network entity of claim 18 , wherein one or more of a quantity of non-overlapping control channel elements associated with the first PDCCH repetition and the second PDCCH repetition or a quantity of blind decodes associated with the first PDCCH repetition and the second PDCCH repetition are limited on a per-slot basis.
25 . The network entity of claim 18 , wherein the slot is configured based on one or more of:
a quantity of search space sets for the slot;
a variable related to a length of search space sets for the slot; or
a symbol index of an initial symbol of the first PDCCH repetition or the second PDCCH repetition for the slot.
26 . The network entity of claim 18 , wherein a search space set in which the first PDCCH repetition and the second PDCCH repetition are located is configured for one or more of:
a plurality of cells;
a plurality of network entities configured to operate in a configured carrier frequency; or a serving cell for a user equipment.
27 . The network entity of claim 18 , wherein the one or more processors are further configured to cause the network entity to:
output, in system information, an indication of one or more parameters that indicate a first location of the first PDCCH repetition in the slot and a second location of the second PDCCH repetition in the slot.
28 . A method of wireless communication performed by a user equipment (UE), comprising:
receiving a first physical downlink control channel (PDCCH) repetition of a PDCCH in a slot, the first PDCCH repetition being located in a first common search space (CSS); and
receiving a second PDCCH repetition of the PDCCH in the slot, the second PDCCH repetition being located in a second CSS that is of a same CSS type as the first CSS, wherein the first CSS and the second CSS are linked via a search space linking identifier configured by radio resource control (RRC) signaling.
29 . The method of claim 28 , wherein the same CSS type comprises Type 0A, Type 1, or Type 2.
30 . The method of claim 28 , wherein the first and second PDCCH repetitions are associated with a same downlink control information (DCI) format.
31 . The method of claim 28 , wherein a quantity of blind decodes associated with the first PDCCH repetition and the second PDCCH repetition is limited on a per-slot basis.
32 . The method of claim 28 , further comprising performing one PDCCH decoding operation on the slot.
33 . A method of wireless communication performed by a network entity, comprising:
outputting a first physical downlink control channel (PDCCH) repetition of a PDCCH in a slot, the first PDCCH repetition being located in a first common search space (CSS); and
outputting a second PDCCH repetition of the PDCCH in the slot, the second PDCCH repetition being located in a second CSS that is of a same CSS type as the first CSS, wherein the first CSS and the second CSS are linked via a search space linking identifier configured by radio resource control (RRC) signaling.