Dynamic interference management in NR dynamic TDD systems
Systems, methods, and instrumentalities are disclosed for dynamic interference management in NR dynamic TDD systems. A first WTRU (e.g., an aggressor WTRU) may receive downlink control information (DCI). The first WTRU may determine a first priority associated with the first WTRU. The first WTRU may determine the first priority based on one or more of the DCI or a logical channel prioritization. The first WTRU may receive an interference measurement reference signal (IMRS) transmission from a second WTRU (e.g., a victim WTRU). The first WTRU may measure the received IMRS transmission. The first WTRU may determine a second priority associated with a downlink payload of the second WTRU. The first WTRU may determine that the second priority is greater than the first priority. The first WTRU may adjust an uplink transmission power of the first WTRU, for example, based on the first priority and the second priority.
1. A first wireless transmit/receive unit (WTRU) comprising:
a processor configured to:
determine a first priority associated with the first WTRU based on one or more of downlink control information (DCI) or a logical channel prioritization;
measure an interference measurement reference signal (IMRS) transmission, wherein the IMRS transmission is received from a second WTRU;
determine a second priority associated with the second WTRU based on the IMRS transmission;
determine that the second priority is greater than the first priority; and
adjust an uplink transmission power of the first WTRU based on the measurement of the IMRS transmission and the determination that the second priority is greater than the first priority.
2. The first WTRU of claim 1 , wherein the second priority associated with the second WTRU is indicated in the IMRS transmission.
3. The first WTRU of claim 1 , wherein the adjustment of the uplink transmission power comprises a reduction of the uplink transmission power.
4. The first WTRU of claim 3 , wherein an amount that the uplink transmission power is reduced is based on one or more of the measurement of the IMRS transmission or a receive power determined based on the measurement of the IMRS transmission.
5. The first WTRU of claim 1 , wherein the processor is further configured to determine one or more of:
an identity of the second WTRU and one or more characteristics of the second WTRU based on the IMRS transmission, wherein the second priority is further determined based on the identity of the second WTRU and the one or more characteristics of the second WTRU, or
a reference signal received power (RSRP) associated with the second WTRU based on the measurement of the IMRS transmission, wherein the uplink transmission power is adjusted based on the RSRP associated with the second WTRU.
6. The first WTRU of claim 1 , wherein the first priority is associated with uplink data that is to be sent from the first WTRU, and the second priority is associated with downlink data that is to be received by the second WTRU.
7. A method comprising:
a first WTRU determining a first priority associated with the first WTRU based on one or more of downlink control information (DCI) or a logical channel prioritization;
the first WTRU measuring an interference measurement reference signal (IMRS) transmission, wherein the IMRS transmission is received from a second WTRU;
the first WTRU determining a second priority associated with the second WTRU based on the IMRS transmission;
the first WTRU determining that the second priority is greater than the first priority; and
the first WTRU adjusting an uplink transmission power of the first WTRU based on the measurement of the IMRS transmission and the determination that the second priority is greater than the first priority.
8. The method of claim 7 , wherein the second priority associated with the second WTRU is indicated in the IMRS transmission.
9. The method of claim 7 , wherein the adjustment of the uplink transmission power comprises a reduction of the uplink transmission power.
10. The method of claim 9 , wherein an amount that the uplink transmission power is reduced is based on one or more of the measurement of the IMRS transmission or a receive power determined based on the measurement of the IMRS transmission.
11. The method of claim 7 , further comprising:
the first WTRU determining an identity of the second WTRU and one or more characteristics of the second WTRU based on the IMRS transmission, wherein the second priority is further determined based on the identity of the second WTRU and the one or more characteristics of the second WTRU, or
the first WTRU determining a reference signal received power (RSRP) associated with the second WTRU based on the measurement of the IMRS transmission, wherein the uplink transmission power is adjusted based on the RSRP associated with the second WTRU.
12. A first wireless transmit/receive unit (WTRU) comprising:
a processor configured to:
determine a reference signal received power (RSRP) of one or more transmission/reception points (TRPs);
receive downlink control information (DCI);
determine to send an interference measurement reference signal (IMRS) transmission based on the determined RSRP;
determine a priority of upcoming downlink data based on the received DCI; and
send, to a second WTRU, the IMRS transmission, wherein the IMRS transmission indicates the priority of the upcoming downlink data.
13. The first WTRU of claim 12 , wherein the processor is further configured to determine one or more resources for the IMRS transmission based on the received DCI.
14. The first WTRU of claim 12 , wherein the processor is further configured to select a transmit beam for the IMRS transmission based on the received DCI.
15. The first WTRU of claim 14 , wherein the selected transmit beam is symmetric to a receive beam selected to receive the upcoming downlink data.
16. The first WTRU of claim 12 , wherein the processor is further configured to receive the upcoming downlink data from the second WTRU using a receive beam that is selected based on the received DCI.