Physical layer designs for carrier aggregation-based radio unit sharing
Methods, systems, and devices for wireless communications are described. In wireless communications, operators may coordinate resource sharing over respective carriers. A user interface may receive, by a first network entity associated with a first carrier from a second network entity associated with a second carrier, an indication of a first set of time intervals when the second carrier is available for communications from the first network entity. The first network entity may be associated with a first operator and the second network entity may be associated with a second operator. Both the first network entity and the second network entity may be coupled to a single radio unit. The first network entity may transmit based on receiving the indication, control signaling indicating a carrier aggregation mode associated with the first carrier and the second carrier for one or more user equipment.
1 . An apparatus, comprising:
at least one processor;
memory coupled with the at least one processor; and
instructions stored in the memory and executable by the at least one processor to cause the apparatus to:
receive, via a central unit or a distributed unit of a first network entity associated with a first carrier from a central unit or a distributed unit of a second network entity associated with a second carrier, an indication of a first set of time intervals during which the second carrier is available for wireless communications performed by the first network entity, wherein the first network entity is associated with a first operator and the second network entity is associated with a second operator, and wherein both the first network entity and the second network entity are coupled to a single radio unit;
transmit, based at least in part on receiving the indication, control signaling indicating a carrier aggregation mode associated with the first carrier and the second carrier for one or more user equipments (UE); and
communicate, via the radio unit, with the one or more UEs during the first set of time intervals via the first carrier and the second carrier according to the indication of the carrier aggregation mode.
2 . The apparatus of claim 1 , wherein the instructions to receive the indication are executable by the at least one processor to cause the apparatus to:
receive an indication of a configuration of the first set of time intervals and a second set of time intervals during which the second carrier is unavailable for wireless communications performed by the first network entity and is occupied by wireless communications performed by the second network entity via the radio unit.
3 . The apparatus of claim 2 , wherein the configuration further indicates that the first carrier is available for wireless communications performed by the second network entity via the radio unit during one or more time intervals of the second set of time intervals.
4 . The apparatus of claim 2 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
transmit a coordination message indicating an availability of the first carrier for the wireless communications performed by the second network entity via the radio unit during the second set of time intervals, wherein receiving the indication of the configuration is based at least in part on the coordination message.
5 . The apparatus of claim 1 , wherein the instructions to receive the indication are executable by the at least one processor to cause the apparatus to:
receive an indication of the first set of time intervals, a second set of time intervals during which the second carrier is unavailable for wireless communications performed by the first network entity and is occupied by wireless communications performed by the second network entity via the radio unit, and a shared third set of time intervals during which the second carrier is available for wireless communications performed by the first network entity or the second network entity.
6 . The apparatus of claim 5 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
transmit, to the second network entity at least a threshold amount of time prior to a first time interval of the shared third set of time intervals, a resource sharing message indicating the first time interval of the shared third set of time intervals; and
communicate, via the first carrier and the second carrier and based at least in part on the resource sharing message, with the one or more UEs during the first time interval of the shared third set of time intervals.
7 . The apparatus of claim 5 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
receive, from the second network entity at least a threshold amount of time prior to a first time interval of the shared third set of time intervals, a resource sharing message indicating the first time interval of the shared third set of time intervals; and
refrain from communicating with the one or more UEs via the first carrier and the second carrier during the first time interval of the shared third set of time intervals based at least in part on receiving the resource sharing message.
8 . The apparatus of claim 1 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
receive, from the second network entity, an indication of transmission parameters for common signaling associated with the first operator and the second operator; and
transmit, during the first set of time intervals, the common signaling according to the transmission parameters.
9 . The apparatus of claim 8 , wherein:
the common signaling comprises synchronization signals, channel state information reference signals, or a combination thereof.
10 . The apparatus of claim 1 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
receive, from the second network entity, an indication of first subset of frequency resources of the first carrier reserved for transmitting common signaling associated with the second operator; and
refrain from communicating with the one or more UEs via the first subset of frequency resources during the first set of time intervals.
11 . The apparatus of claim 10 , wherein the instructions are further executable by the at least one processor to cause the apparatus to:
transmit, to the second network entity, an indication of a second subset of frequency resources of the second carrier reserved for common signaling associated with the first operator; and
transmit the common signaling via the second subset of frequency resources of the first carrier during a second set of time intervals during which the second carrier is otherwise unavailable for wireless communications performed by the first network entity.
12 . The apparatus of claim 10 , wherein:
the common signaling comprises synchronization signals, channel state information reference signals, system information, automatic neighbor relation information, or any combination thereof.
13 . The apparatus of claim 1 , wherein the instructions to receive the indication are executable by the at least one processor to cause the apparatus to:
receive the indication via a third network entity relaying the indication from the second network entity.
14 . The apparatus of claim 1 , wherein the instructions to communicate with the one or more UEs are executable by the at least one processor to cause the apparatus to:
transmit control signaling via the first carrier, the first carrier comprising a primary cell of the carrier aggregation mode; and
transmit data signaling, common signaling, or both, via the second carrier, the second carrier comprising a secondary cell of the carrier aggregation mode.
15 . A method for wireless communications comprising:
receiving, via a central unit or a distributed unit of a first network entity associated with a first carrier from a central unit or a distributed unit of a second network entity associated with a second carrier, an indication of a first set of time intervals during which the second carrier is available for wireless communications performed by the first network entity, wherein the first network entity is associated with a first operator and the second network entity is associated with a second operator, and wherein both the first network entity and the second network entity are coupled to a single radio unit;
transmitting, based at least in part on receiving the indication, control signaling indicating a carrier aggregation mode associated with the first carrier and the second carrier for one or more user equipments (UE); and
communicating, via the radio unit, with the one or more UEs during the first set of time intervals via the first carrier and the second carrier according to the indication of the carrier aggregation mode.
16 . The method of claim 15 , wherein receiving the indication comprises:
receiving an indication of a configuration of the first set of time intervals and a second set of time intervals during which the second carrier is unavailable for wireless communications performed by the first network entity and is occupied by wireless communications performed by the second network entity via the radio unit.
17 . The method of claim 16 , wherein the configuration further indicates that the first carrier is available for wireless communications performed by the second network entity via the radio unit during one or more time intervals of the second set of time intervals.
18 . The method of claim 16 , further comprising:
transmitting a coordination message indicating an availability of the first carrier for the wireless communications performed by the second network entity via the radio unit during the second set of time intervals, wherein receiving the indication of the configuration is based at least in part on the coordination message.
19 . The method of claim 15 , wherein receiving the indication comprises:
receiving an indication of the first set of time intervals, a second set of time intervals during which the second carrier is unavailable for wireless communications performed by the first network entity and is occupied by wireless communications performed by the second network entity via the radio unit, and a shared third set of time intervals during which the second carrier is available for wireless communications performed by the first network entity or the second network entity.
20 . The method of claim 19 , further comprising:
transmitting, to the second network entity at least a threshold amount of time prior to a first time interval of the shared third set of time intervals, a resource sharing message indicating the first time interval of the shared third set of time intervals; and
communicating, via the first carrier and the second carrier and based at least in part on the resource sharing message, with the one or more UEs during the first time interval of the shared third set of time intervals.
21 . The method of claim 19 , further comprising:
receiving, from the second network entity at least a threshold amount of time prior to a first time interval of the shared third set of time intervals, a resource sharing message indicating the first time interval of the shared third set of time intervals; and
refraining from communicating with the one or more UEs via the first carrier and the second carrier during the first time interval of the shared third set of time intervals based at least in part on receiving the resource sharing message.
22 . The method of claim 15 , further comprising:
receiving, from the second network entity, an indication of transmission parameters for common signaling associated with the first operator and the second operator; and
transmitting, during the first set of time intervals, the common signaling according to the transmission parameters.
23 . The method of claim 22 , wherein the common signaling comprises synchronization signals, channel state information reference signals, or a combination thereof.
24 . The method of claim 15 , further comprising:
receiving, from the second network entity, an indication of first subset of frequency resources of the first carrier reserved for transmitting common signaling associated with the second operator; and
refraining from communicating with the one or more UEs via the first subset of frequency resources during the first set of time intervals.
25 . The method of claim 24 , further comprising:
transmitting, to the second network entity, an indication of a second subset of frequency resources of the second carrier reserved for common signaling associated with the first operator; and
transmitting the common signaling via the second subset of frequency resources of the first carrier during a second set of time intervals during which the second carrier is otherwise unavailable for wireless communications performed by the first network entity.
26 . The method of claim 24 , wherein the common signaling comprises synchronization signals, channel state information reference signals, system information, automatic neighbor relation information, or any combination thereof.
27 . An apparatus, comprising:
means for receiving, via a central unit or a distributed unit of a first network entity associated with a first carrier from a central unit or a distributed unit of a second network entity associated with a second carrier, an indication of a first set of time intervals during which the second carrier is available for wireless communications performed by the first network entity, wherein the first network entity is associated with a first operator and the second network entity is associated with a second operator, and wherein both the first network entity and the second network entity are coupled to a single radio unit;
means for transmitting, based at least in part on receiving the indication, control signaling indicating a carrier aggregation mode associated with the first carrier and the second carrier for one or more user equipments (UE); and
means for communicating, via the radio unit, with the one or more UEs during the first set of time intervals via the first carrier and the second carrier according to the indication of the carrier aggregation mode.
28 . A non-transitory computer-readable medium storing code, the code comprising instructions executable by at least one processor to:
receive, via a central unit or a distributed unit of a first network entity associated with a first carrier from a central unit or a distributed unit of a second network entity associated with a second carrier, an indication of a first set of time intervals during which the second carrier is available for wireless communications performed by the first network entity, wherein the first network entity is associated with a first operator and the second network entity is associated with a second operator, and wherein both the first network entity and the second network entity are coupled to a single radio unit;
transmit, based at least in part on receiving the indication, control signaling indicating a carrier aggregation mode associated with the first carrier and the second carrier for one or more user equipments (UE); and
communicate, via the radio unit, with the one or more UEs during the first set of time intervals via the first carrier and the second carrier according to the indication of the carrier aggregation mode.