Radar operation of wireless device in wireless communication system

1. An access node comprising:

a processor; and

a transceiver;

wherein the transceiver is configured to:

receive a random access message from a wireless device of a wireless communication system, wherein the random access message indicates one or more radar communication resource request; and

wherein the processor is configured to:

determine that the received random access message is for a radar operation of the wireless device; and

wherein the processor is configured to:

transmit a grant for one or more communication resources for the radar operation of the wireless device;

wherein the grant comprises a radar sequence identifier and information indicating the communication resources for the radar operation.

2. The access node according to claim 1 , wherein the random access message is determined to be for a radar operation of the wireless device, when the random access message comprises a dedicated random access preamble indicating the radar operation.

3. The access node according to any of claim 1 , wherein the processor is further configured to omit a radar sequence identifier from the grant, when the received random access message comprises a dedicated random access preamble indicating a radar operation.

4. The access node according to claim 1 , wherein the random access message is determined to be for a radar operation of the wireless device, on the basis of an uplink shared channel message from the wireless device associated with the random access message.

5. A wireless device comprising:

a processor; and

a transceiver,

wherein the processor is configured to:

control the transceiver to transmit a random access message for a radar operation of the wireless device in a wireless communication system, wherein the random access message indicates one or more radar communication resource request; and

wherein the transceiver is configured to:

receive a grant for at least one communication resource for the radar operation of the wireless device; and

wherein the processor is further configured to:

select a radar sequence for generating a radar signal; and

wherein the transceiver is further configured to:

transmit the radar signal using the selected radar sequence in the communication resource;

wherein the processor is configured to control the transceiver to transmit an uplink shared channel message associated with the random access message.

6. The wireless device according to claim 5 , wherein the radar sequence is selected by the wireless device, when

the wireless device is out of coverage area of the wireless communication system;

the random access message has been transmitted without a dedicated random access preamble indicating a radar operation; and/or

the grant fails to include a radar sequence identifier.

7. The wireless device according to claim 5 , wherein the random access message comprises a dedicated random access preamble indicating the radar operation.

8. The wireless device according to claim 5 , wherein the radar sequence is selected on the basis of a pre-configuration of a radar sequence identifier or a set of candidate radar sequence identifiers of the wireless device.

9. The wireless device according to claim 8 , wherein the pre-configuration is based on a Subscriber Identity Module, SIM, or a User Equipment (UE) identifier of the wireless device.

10. The wireless device according to any of claim 5 , wherein the radar sequence is selected on the basis of a radar sequence identifier included in the grant.

11. A method comprising:

receiving a random access message from a wireless device of a wireless communication system, wherein the random access message indicates one or more radar communication resource request;

determining that the received random access message is for a radar operation of the wireless device; and

transmitting a grant for one or more communication resources for the radar operation of the wireless device;

wherein the grant comprises a radar sequence identifier and information indicating the communication resources for the radar operation.

12. A method comprising:

transmitting a random access message for a radar operation of a wireless device in a wireless communication system, wherein the random access message indicates one or more radar communication resource;

receiving a grant for at least one communication resource for the radar operation of the wireless device;

selecting a radar sequence for generating a radar signal;

transmitting the radar signal using the selected radar sequence in the communication resource; and

transmitting an uplink shared channel message associated with the random access message.

13. The method according to claim 12 , wherein the radar sequence is selected by the wireless device, when

the wireless device is out of coverage area of the wireless communication system;

the random access message has been transmitted without a dedicated random access preamble indicating a radar operation; and/or

the grant fails to include a radar sequence identifier.

14. The method according to claim 12 , wherein the random access message comprises a dedicated random access preamble indicating the radar operation.

15. The method according to claim 12 , wherein the radar sequence is selected on the basis of a pre-configuration of a radar sequence identifier or a set of candidate radar sequence identifiers of the wireless device.

16. The method according to claim 15 , wherein the pre-configuration is based on a Subscriber Identity Module, SIM, or a User Equipment, UE, identifier of the wireless device.