Assistance for performing listen-before-talk operations
Apparatuses, methods, and systems are disclosed for assistance for performing listen-before-talk operations. One method includes exchanging, at a network device and with a UE in a second carrier without performing a listen-before-talk operation, assistance information for performing listen-before-talk for a first carrier. The method includes transmitting, to the UE on the second carrier without performing the listen-before-talk operation, an indication to perform interference measurement on the first carrier. The method includes receiving, from the UE on the second carrier, first assistance information including an indication of the results of interference measurement at the UE of the first carrier. The method includes transmitting, to the UE on the second carrier without performing the listen-before-talk operation, second assistance information including an indication of the results of interference measurement at the network device of the first carrier.
1 . A method performed by a network device, the method comprising:
exchanging, with a user equipment (UE) in a second carrier without performing a listen-before-talk (LBT) operation, assistance information for performing LBT for a first carrier, wherein the assistance information comprises first assistance information and second assistance information;
transmitting, to the UE on the second carrier without performing the LBT operation, an indication to perform interference measurement on the first carrier;
receiving, from the UE on the second carrier, the first assistance information comprising results of interference measurement at the UE of the first carrier; and
transmitting, to the UE on the second carrier without performing the LBT operation, the second assistance information comprising results of interference measurement at the network device of the first carrier.
2 . The method of claim 1 , further comprising transmitting, to UE on the second carrier without performing the LBT operation, configuration information indicating resources of the first carrier to be used for uplink.
3 . The method of claim 1 , wherein the second carrier overlaps the first carrier in frequency domain.
4 . The method of claim 1 , further comprising transmitting a trigger for the exchanging of the assistance information in the second carrier without the LBT operation being performed.
5 . The method of claim 4 , wherein the trigger comprises a configuration of a measurement performed at the first carrier, and the configuration of the measurement comprises an indication of at least one bandwidth part, at least one beam, or a combination thereof.
6 . The method of claim 1 , wherein signaling used for exchanging the assistance information is generated based on a pulse-based waveform with narrow pulses.
7 . The method of claim 6 , wherein the pulse-based waveform uses a low power and a wide bandwidth, and the pulse-based waveform is repeated to increase reliability.
8 . The method of claim 6 , wherein the pulse-based waveform is generated by masking part of a cyclic prefix of symbols of the first carrier with narrow pulses that carry the assistance information.
9 . The method of claim 1 , wherein signaling used for exchanging the assistance information is generated based on a licensed carrier using a physical layer control signaling, high layer radio resource control (RRC) signaling, or a medium access control control element (MAC CE).
10 . A base station for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the base station to:
exchange, with a user equipment (UE) in a second carrier without performing a listen-before-talk (LBT) operation, assistance information for performing LBT for a first carrier, wherein the assistance information comprises first assistance information and second assistance information;
transmit, to the UE on the second carrier without performing the LBT operation, an indication to perform interference measurement on the first carrier;
receive, from the UE on the second carrier, the first assistance information comprising results of interference measurement at the UE of the first carrier; and
transmit, to the UE on the second carrier without performing the LBT operation, the second assistance information comprising results of interference measurement at the base station of the first carrier.
11 . The base station of claim 10 , wherein the at least one processor is configured to cause the base station to transmit, to the UE on the second carrier without performing the LBT operation, configuration information indicating resources of the first carrier to be used for uplink.
12 . The base station of claim 10 , wherein the at least one processor is configured to cause the base station to transmit a trigger for the exchanging of the assistance information in the second carrier without the LBT operation being performed.
13 . A user equipment (UE) for wireless communication, comprising:
at least one memory; and
at least one processor coupled with the at least one memory and configured to cause the UE to:
exchange, with a base station in a second carrier without performing a listen-before-talk (LBT) operation, assistance information for performing LBT for a first carrier, wherein the assistance information comprises first assistance information and second assistance information;
receive, from the base station on the second carrier without performing the LBT operation, an indication to perform interference measurement on the first carrier;
transmit, to the base station on the second carrier, the first assistance information comprising results of interference measurement at the user equipment of the first carrier; and
receive, from the base station on the second carrier without performing the LBT operation, the second assistance information comprising results of interference measurement at the base station of the first carrier.
14 . The UE of claim 13 , wherein the at least one processor is configured to cause the UE to receive, from the base station on the second carrier without performing the LBT operation, configuration information indicating resources of the first carrier to be used for uplink.
15 . The UE of claim 13 , wherein the second carrier overlaps the first carrier in frequency domain.
16 . A processor for wireless communication, comprising:
at least one controller coupled with at least one memory and configured to cause the processor to:
exchange, with a base station in a second carrier without performing a listen-before-talk (LBT) operation, assistance information for performing LBT for a first carrier, wherein the assistance information comprises first assistance information and second assistance information;
receive, from the base station on the second carrier without performing the LBT operation, an indication to perform interference measurement on the first carrier;
transmit, to the base station on the second carrier, the first assistance information comprising results of interference measurement at a user equipment (UE) of the first carrier; and
receive, from the base station on the second carrier without performing the LBT operation, the second assistance information comprising results of interference measurement at the base station of the first carrier.
17 . The processor of claim 16 , wherein the at least one controller is configured to cause the processor to receive, from the base station on the second carrier without performing the LBT operation, configuration information indicating resources of the first carrier to be used for uplink.
18 . The processor of claim 16 , wherein the second carrier overlaps the first carrier in frequency domain.
19 . The base station of claim 10 , wherein the second carrier overlaps the first carrier in frequency domain.
20 . The base station of claim 12 , wherein the trigger comprises a configuration of a measurement performed at the first carrier, and the configuration of the measurement comprises an indication of at least one bandwidth part, at least one beam, or a combination thereof.