Method and apparatus for cross-link interference measurements in mobile communications

1. A method, comprising:

receiving, by a first node of a wireless network, a cross-link interference (CLI) measurement configuration;

determining, by the first node, a first measurement slot according to the CLI measurement configuration;

determining, by the first node, whether to perform a CLI measurement or to transmit a first CLI reference signal (RS) in the first measurement slot according to an indication in the CLI measurement configuration; and

performing, by the first node responsive to the CLI measurement configuration indicating to the first node to perform the CLI measurement, operations comprising:

receiving a second CLI RS in the first measurement slot; and

performing the CLI measurement in the first measurement slot.

2. The method of claim 1 , wherein the CLI measurement configuration indicates periodic measurement slots.

3. The method of claim 1 , wherein the CLI measurement configuration comprises at least one of a node identity (ID), a time-frequency location, a slot number or a symbol number of at least one of the first CLI RS and the second CLI RS.

4. The method of claim 1 , wherein at least one of the first CLI RS and the second CLI RS comprises at least one of a sounding reference signal (SRS), a channel state information-reference signal (CSI-RS) or a demodulation reference signal (DMRS).

5. The method of claim 1 , further comprising:

determining, by the first node, a second measurement slot according to the CLI measurement configuration;

determining, by the first node, whether to transmit the first CLI RS in the second measurement slot according to the CLI measurement configuration; and

transmitting, by the first node, the first CLI RS in the second measurement slot.

6. The method of claim 1 , further comprising:

receiving, by the first node, a sounding reference signal (SRS) resource of an SRS;

determining, by the first node, an SRS sequence according to the SRS resource;

measuring, by the first node, a reference symbol received power (RSRP) of the SRS; and

reporting, by the first node, the SRS sequence and the RSRP to a second node of the wireless network,

wherein the second CLI RS comprises the SRS.

7. The method of claim 1 , further comprising:

blindly detecting, by the first node, a sounding reference signal (SRS) according to a pre-determined SRS resource;

determining, by the first node, an SRS sequence according to the pre-determined SRS resource;

measuring, by the first node, a reference symbol received power (RSRP) of the SRS; and

reporting, by the first node, the SRS sequence and the RSRP to a second node of the wireless network,

wherein the second CLI RS comprises the SRS.

8. The method of claim 6 , wherein the SRS resource comprises at least one of a root sequence, a cyclic shift, a comb number or a frequency location.

9. The method of claim 1 , further comprising:

measuring, by the first node, a received power of a sounding reference signal (SRS); and

reporting, by the first node, the received power to a second node of the wireless network,

wherein the second CLI RS comprises the SRS.

10. The method of claim 1 , further comprising:

determining, by the first node, whether to transmit uplink data according to a CLI measurement result,

wherein the second CLI RS is received at front of the first measurement slot.

11. An apparatus, comprising:

a transceiver capable of wirelessly communicating with a plurality of nodes of a wireless network; and

a processor communicatively coupled to the transceiver, the processor capable of:

receiving, via the transceiver, a cross-link interference (CLI) measurement configuration;

determining a first measurement slot according to the CLI measurement configuration;

determining whether to perform a CLI measurement or to transmit a first CLI reference signal (RS) in the first measurement slot according to an indication in the CLI measurement configuration; and

performing, responsive to the CLI measurement configuration indicating to the first node to perform the CLI measurement, operations comprising:

receiving, via the transceiver, a second CLI RS in the first measurement slot; and

performing the CLI measurement in the first measurement slot.

12. The apparatus of claim 11 , wherein the CLI measurement configuration indicates periodic measurement slots.

13. The apparatus of claim 11 , wherein the CLI measurement configuration comprises at least one of a node identity (ID), a time-frequency location, a slot number or a symbol number of at least one of the first CLI RS and the second CLI RS.

14. The apparatus of claim 11 , wherein at least one of the first CLI RI and the second CLI RS comprises at least one of a sounding reference signal (SRS), a channel state information-reference signal (CSI-RS) or a demodulation reference signal (DMRS).

15. The apparatus of claim 11 , wherein the processor is further capable of:

determining a second measurement slot according to the CLI measurement configuration;

determining whether to transmit the first CLI RS in the second measurement slot according to the CLI measurement configuration; and

transmitting, via the transceiver, the first CLI RS in the second measurement slot.

16. The apparatus of claim 11 , wherein the processor is further capable of:

receiving, via the transceiver, a sounding reference signal (SRS) resource of an SRS;

determining an SRS sequence according to the SRS resource;

measuring a reference symbol received power (RSRP) of the SRS; and

reporting, via the transceiver, the SRS sequence and the RSRP to a second node of the wireless network,

wherein the second CLI RS comprises the SRS.

17. The apparatus of claim 11 , wherein the processor is further capable of:

blindly detecting a sounding reference signal (SRS) according to a pre-determined SRS resource;

determining an SRS sequence according to the pre-determined SRS resource;

measuring a reference symbol received power (RSRP) of the SRS; and

reporting, via the transceiver, the SRS sequence and the RSRP to a second node of the wireless network,

wherein the second CLI RS comprises the SRS.

18. The apparatus of claim 16 , wherein the SRS resource comprises at least one of a root sequence, a cyclic shift, a comb number or a frequency location.

19. The apparatus of claim 11 , wherein the processor is further capable of:

measuring a received power of a sounding reference signal (SRS); and

reporting, via the transceiver, the received power to a second node of the wireless network,

wherein the second CLI RS comprises the SRS.

20. The apparatus of claim 11 , wherein the processor is further capable of:

determining whether to transmit uplink data according to a CLI measurement result,

wherein the second CLI RS is received at front of the first measurement slot.