Technologies for listen-before-talk indication in high-frequency networks

1 . A method comprising:

receiving a system information block (SIB) in a serving cell, the SIB to include an a first indication of whether a first neighbor cell with a first physical cell identity (PCI) of a frequency level uses a listen-before-talk (LBT) procedure and a second indication to indicate whether the LBT procedure is used for a second PCI of the carrier frequency level; and

performing a measurement with respect to the first neighbor cell based on whether the first neighbor cell uses the LBT procedure.

2 . The method of claim 1 , further comprising:

receiving the SIB while in a radio resource control (RRC) connected state or an RRC idle state.

3 . The method of claim 1 , further comprising:

transmitting, to the serving cell, a request for the first indication.

4 . The method of claim 3 , wherein the request is a physical random access channel (PRACH) transmission, uplink control information, a media access control-control element (MAC-CE), or a radio resource control (RRC) transmission.

5 . The method of claim 1 , wherein the SIB comprises a SIB 3 or SIB 4.

6 . The method of claim 1 , wherein the first indication applies to a plurality of neighbor cells in the carrier frequency level.

7 . The method of claim 1 , wherein the serving cell and the first neighbor cell operate in a same carrier frequency.

8 . A method comprising:

generating a system information block (SIB) to include a first indication of whether a first neighbor cell of a serving cell with which a user equipment (UE) is connected uses a listen-before-talk (LBT) procedure and a second indication of whether a second neighbor cell uses the LBT procedure, wherein the first neighbor cell has a first physical cell identity (PCI) of a carrier frequency level and the second neighbor cell has a second PCI of the carrier frequency level; and

outputting the SIB for transmission to the UE in the serving cell.

9 . The method of claim 8 , wherein the SIB includes the first indication in a measurement object information element (IE).

10 . The method of claim 8 , wherein the SIB is in a message, carrier frequency level is a first carrier frequency level and the method further comprises:

generating the message to include a third indication to indicate whether the first neighbor cell uses the LBT procedure for a second carrier frequency level.

11 . The method of claim 8 , wherein the SIB comprises a SIB 3 or SIB 4.

12 . An apparatus comprising:

a radio-frequency (RF) interface; and

processing circuitry coupled with the RF interface, the processing circuitry to:

configure a first user equipment (UE) to report listen-before-talk (LBT) information;

receive, from the first UE, a message that includes a cell global identity associated with a neighbor cell; and

determine, based on the message, whether a neighbor cell of a serving cell with which a second UE is connected uses an LBT procedure;

generate a system information block (SIB) to include an indication of whether the neighbor cell the LBT procedure; and

output, via the RF interface, the SIB for transmission to the second UE in the serving cell.

13 . The apparatus of claim 12 , wherein the SIB includes the indication in a measurement object information element (IE).

14 . The apparatus of claim 12 , wherein the message is a first message, the SIB is in a second message, the indication is a first indication to indicate whether the neighbor cell uses the LBT procedure for a first carrier frequency level and the processing circuitry is further to:

generate the second message to include a second indication to indicate whether the neighbor cell uses the LBT procedure for a second carrier frequency level.

15 . The apparatus of claim 12 , wherein the message is a first message, the SIB is in a second message, the indication is a first indication to indicate whether the LBT procedure is used for a first physical cell identifier (PCI) of a carrier frequency level, and the processing circuitry is further to:

generate the message to include a second indication to indicate whether the LBT procedure is used for a second PCI of the carrier frequency level.

16 . The apparatus of claim 12 , wherein the SIB comprises a SIB 3 or SIB 4.