Transmission configuration indicator state determination based on multiple control channel repetitions
Methods, systems, and devices for wireless communications are described in which network nodes may configure linked search space (SS) sets that provide multiple instances of control channel communications. A beam configuration, or transmission configuration indicator (TCI) state, for a downlink transmission scheduled by instances of the control channel communications may be determined based on a control resource set (CORESET) of one or more of the different SS sets. A first network node may decode a first control channel communication from one or more instances of the control channel communications, the first control channel communication indicating a resource allocation for a first downlink communication. The first network node may determine whether one or more TCI states are applied to the first downlink communication based on one or more CORESETs associated with the first control channel communication, and receive the first downlink communication based on the determined one or more TCI states.
1. A first network node for wireless communication, comprising:
at least one processor; and
memory coupled with the at least one processor, wherein the at least one processor is configured to:
receive, from a second network node, first control information that indicates two or more linked search space sets, wherein each of the two or more linked search space sets includes an instance of a first control channel communication, and wherein each respective linked search space set of the two or more linked search space sets is associated with a respective control resource set;
receive, from the second network node, second control information that indicates one or more transmission configuration indicator (TCI) states of one or more control resource sets associated with the two or more linked search space sets, wherein the one or more TCI states are used for at least a subset of communications between the first network node and the second network node after a period of time;
decode at least one instance of the first control channel communication from at least one of the two or more linked search space sets, wherein the first control channel communication indicates a resource allocation for a first downlink communication;
determine whether a first TCI state of the one or more TCI states or a second TCI state that is different than the one or more TCI states is used for the first downlink communication based on the second control information and based on a reference control resource set that is associated with the two or more linked search space sets having the first TCI state, wherein a first control resource set associated with the two or more linked search space sets is the reference control resource set based on a control resource set type of each of two or more control resource sets associated with the two or more linked search space sets; and
receive, from the second network node, the first downlink communication based on the determination.
2. The first network node of claim 1 , wherein:
the first control information includes information indicative of a monitoring occasion and an associated control resource set for each search space set of the two or more linked search space sets, wherein each respective control resource set has an associated TCI state.
3. The first network node of claim 1 , wherein the at least one processor is configured to:
determine that a first control resource set associated with the two or more linked search space sets is the reference control resource set based on a first control resource set identification value of the first control resource set relative to other control resource set identification values of one or more other control resource sets associated with the two or more linked search space sets.
4. The first network node of claim 1 , wherein the at least one processor is configured to:
determine that a first control resource set associated with the two or more linked search space sets is the reference control resource set based on an index value of an associated first search space set relative to index values of one or more other of the two or more linked search space sets.
5. The first network node of claim 1 , wherein the at least one processor is configured to:
determine that a first control resource set associated with the two or more linked search space sets is the reference control resource set based on a starting or ending time of an associated first search space set relative to other starting or ending times of other of the two or more linked search space sets.
6. The first network node of claim 1 , wherein the first control resource set has a predetermined control resource set type of a plurality of available control resource set types.
7. The first network node of claim 1 , wherein the first control resource set has a respective control resource set type that provides dedicated reception for the first network node.
8. The first network node of claim 1 , wherein the first control resource set has a respective control resource set type that provides non-dedicated reception for the first network node.
9. The first network node of claim 1 , wherein the first control resource set is determined to be the reference control resource set based at on a control resource set type priority order and a first control resource set type of the first control resource set.
10. The first network node of claim 1 , wherein a TCI state of the reference control resource set is used for receiving the first downlink communication, and wherein the reference control resource set is determined based on a control resource set type of the reference control resource set.
11. The first network node of claim 10 , wherein each control resource set associated with each of the two or more linked search space sets has a same control resource set type that corresponds to the reference control resource set.
12. The first network node of claim 10 , wherein each control resource set associated with each of the two or more linked search space sets has an associated control resource set type that is included in a subset of a set of available control resource set types, and is selectable as the reference control resource set.
13. The first network node of claim 10 , wherein the reference control resource set is selected based on a radio network temporary identifier associated with the first control channel communication.
14. A first network node for wireless communication, comprising:
at least one processor; and
memory coupled with the at least one processor, wherein the at least one processor is configured to:
transmit, to a second network node, first control information that indicates two or more linked search space sets, wherein each of the two or more linked search space sets includes an instance of a first control channel communication, and wherein each respective linked search space set of the two or more linked search space sets is associated with a respective control resource set;
transmit, to the second network node, second control information that indicates one or more transmission configuration indicator (TCI) states of one or more control resource sets associated with the two or more linked search space sets, wherein the one or more TCI states are used for at least a subset of communications between the first network node and the second network node after a period of time;
determine to use a first TCI state of the one or more TCI states for a first downlink communication from the first network node to the second network node based on a reference control resource set that is associated with the two or more linked search space sets having the first TCI state, wherein a first control resource set associated with the two or more linked search space sets is the reference control resource set based on a control resource set type of each of two or more control resource sets associated with the two or more linked search space sets;
transmit a first instance of the first control channel communication in a first search space set of the two or more linked search space sets, and a second instance of the first control channel communication in a second search space set of the two or more linked search space sets, wherein the first control channel communication indicates a resource allocation for the first downlink communication; and
transmit the first downlink communication using the first TCI state.
15. The first network node of claim 14 , wherein:
the first control information includes information indicative of a monitoring occasion and an associated control resource set for each search space set of the two or more linked search space sets, wherein each respective control resource set has an associated transmission configuration indicator state.
16. The first network node of claim 14 , wherein the at least one processor is configured to:
determine that a first control resource set associated with the two or more linked search space sets is the reference control resource set based on a first control resource set identification value of the first control resource set relative to other control resource set identification values of one or more other control resource sets associated with the two or more linked search space sets.
17. The first network node of claim 14 , wherein the at least one processor is configured to:
determine that a first control resource set associated with the two or more linked search space sets is the reference control resource set based on an index value of an associated first search space set relative to index values of one or more other of the two or more linked search space sets.
18. The first network node of claim 14 , wherein the first control resource set is determined to be the reference control resource set based on one or more of:
a predetermined first control resource set type of a plurality of available control resource set types, an associated control resource set type that provides dedicated reception for the second network node, an associated control resource set type that provides non-dedicated reception for the second network node, or
a control resource set type priority order.
19. The first network node of claim 14 , wherein the at least one processor is configured to:
select a first control resource set of the one or more control resource sets as the reference control resource set based on a starting or ending time of an associated first search space set relative to other starting or ending times of other of the two or more linked search space sets.
20. The first network node of claim 14 , wherein the TCI state of the reference control resource set is used for transmission of the first downlink communication, and wherein the reference control resource set is determined based on a control resource set type of the reference control resource set.
21. A method of wireless communication performed by a first network node, comprising:
receiving, from a second network node, first control information that indicates two or more linked search space sets, wherein each of the two or more linked search space sets includes an instance of a first control channel communication, and wherein each respective linked search space set of the two or more linked search space sets is associated with a respective control resource set;
receiving, from the second network node, second control information that indicates one or more transmission configuration indicator (TCI) states of one or more control resource sets associated with the two or more linked search space sets, wherein the one or more TCI states are used for at least a subset of communications between the first network node and the second network node after a period of time;
decoding at least one instance of the first control channel communication from at least one of the two or more linked search space sets, wherein the first control channel communication indicates a resource allocation for a first downlink communication;
determining whether a first TCI state of the one or more TCI states or a second TCI state that is different than the one or more TCI states is used for the first downlink communication based on the second control information and based on a reference control resource set that is associated with the two or more linked search space sets having the first TCI, wherein a first control resource set associated with the two or more linked search space sets is the reference control resource set based on a control resource set type of each of two or more control resource sets associated with the two or more linked search space sets; and
receiving, from the second network node, the first downlink communication based on the determination.
22. A method of wireless communication performed by a first network node, comprising:
transmitting, to a second network node, first control information that indicates two or more linked search space sets, wherein each of the two or more linked search space sets includes an instance of a first control channel communication, and wherein each respective linked search space set of the two or more linked search space sets is associated with a respective control resource set;
transmitting, to the second network node, second control information that indicates one or more transmission configuration indicator (TCI) states of one or more control resource sets associated with the two or more linked search space sets, wherein the one or more TCI states are used for at least a subset of communications between the first network node and the second network node after a period of time;
determining to use a first TCI state of the one or more TCI states for a first downlink communication from the first network node to the second network node based on a reference control resource set that is associated with the two or more linked search space sets having the first TCI state, wherein a first control resource set associated with the two or more linked search space sets is the reference control resource set based on a control resource set type of each of two or more control resource sets associated with the two or more linked search space sets;
transmitting a first instance of the first control channel communication in a first search space set of the two or more linked search space sets, and a second instance of the first control channel communication in a second search space set of the two or more linked search space sets, the first control channel communication indicating a resource allocation for the first downlink communication; and
transmitting the first downlink communication using the first TCI state.
23. The method of claim 22 , wherein:
the first control information includes information indicative of a monitoring occasion and an associated control resource set for each search space set of the two or more linked search space sets, wherein each respective control resource set has an associated transmission configuration indicator state.