PRACH configuration on NR-U

An apparatus configured for wireless communication, comprising:

• means for monitoring, by a user equipment (UE), for a control signal from a serving base station, wherein the control signal identifies a current transmission opportunity (TXOP) of the serving base station;
• means for obtaining, by the UE, an autonomous random access configuration for communications outside of the current TXOP, wherein the autonomous random access configuration identifies a random access slot that includes a plurality of random access occasions;
• and
• means for transmitting, by the UE, in response to a failure to detect the control signal an autonomous random access signal in a random access occasion of the plurality of random access occasions corresponding to a synchronization signal block (SSB) identified by the UE for transmission.

A non-transitory computer-readable medium having program code recorded thereon, the program code comprising:

• program code executable by a computer for causing the computer to monitor, by a user equipment (UE), for a control signal from a serving base station, wherein the control signal identifies a current transmission opportunity (TXOP) of the serving base station;
• program code executable by the computer for causing the computer to obtain, by the UE, an autonomous random access configuration for communications outside of the current TXOP, wherein the autonomous random access configuration identifies a random access slot that includes a plurality of random access occasions;
• and
• program code executable by the computer for causing the computer to transmit, by the UE, in response to a failure to detect the control signal an autonomous random access signal in a random access occasion of the plurality of random access occasions corresponding to a synchronization signal block (SSB) identified by the UE for transmission.

An apparatus configured for wireless communication, the apparatus comprising:

• at least one processor;
• and
• a memory coupled to the at least one processor,
• wherein the at least one processor is configured:
• to monitor, by a user equipment (UE), for a control signal from a serving base station, wherein the control signal identifies a current transmission opportunity (TXOP) of the serving base station;
• to obtain, by the UE, an autonomous random access configuration for communications outside of the current TXOP, wherein the autonomous random access configuration identifies a random access slot that includes a plurality of random access occasions;
• and
• to transmit, by the UE, in response to a failure to detect the control signal an autonomous random access signal in a random access occasion of the plurality of random access occasions corresponding to a synchronization signal block (SSB) identified by the UE for transmission.