Inter-modulation avoidance for transmission on different frequencies
A method, system and network node are disclosed. A network node for communication with a wireless device that is configured for uplink transmission on a first carrier using a first Radio Access Technology (RAT) and on a second carrier using a second RAT is provided. The network node includes processing circuitry configured to determine whether to schedule the wireless device for uplink and whether to schedule the wireless device for uplink and downlink communications, in a transmission time interval (TTI) according to the first RAT based at least in part on an intermodulation distortion quantity associated with uplink communications according to both the first RAT and the second RAT, and optionally schedule the wireless device according to the determination.
1. A network node for communication with a wireless device that is configured for uplink transmission on a first carrier using a first Radio Access Technology (RAT) and on a second carrier using a second RAT, the network node comprising processing circuitry configured to:
determine whether to schedule the wireless device for uplink and downlink communications, in a transmission time interval (TTI), according to the first RAT based at least in part on an intermodulation distortion quantity associated with uplink communications according to both the first RAT and the second RAT; and
schedule the wireless device according to the determination, wherein the determination whether to schedule the wireless device for uplink and downlink communications, in the TTI, according to the first RAT is based at least in part on a quality of service class associated with one of the uplink communication and downlink communication, in the TTI, according to the first RAT.
2. The network node of claim 1 , wherein the intermodulation distortion quantity associated with uplink communications according to both the first RAT and second RAT corresponds to a threshold quantity.
3. The network node of claim 2 , wherein the threshold quantity is based at least in part on previously received Hybrid Automatic Repeat Request (HARQ) feedbacks.
4. The network node of claim 1 , wherein the processing circuitry is further configured to schedule the wireless device for uplink and downlink communications according to the first RAT where a number of resources used for the downlink communication according to the first RAT is based at least in part on the intermodulation distortion quantity.
5. The network node of claim 1 , wherein the intermodulation distortion quantity is set to a quantity that prevents scheduling of the downlink communication according to the first RAT.
6. The network node of claim 1 , wherein the processing circuitry is further configured to avoid scheduling uplink communication, in the TTI, according to the first RAT if downlink communication according to the first RAT is scheduled in the TTI.
7. The network node of claim 1 , wherein the processing circuitry is further configured to avoid scheduling downlink communication, in the TTI, according to the first RAT if the uplink communication according to the first RAT is scheduled in the TTI.
8. The network node of claim 1 , wherein the processing circuitry is further configured to receive, over a backhaul communications link, an indication indicating whether uplink communication according to the second RAT is scheduled; and
the determination whether to schedule the wireless device for uplink and downlink communications, in the TTI, according to the first RAT being based at least in part on the indication.
9. The network node of claim 1 , wherein the first RAT is a Long Term Evolution (LTE) based wireless communication protocol and the second RAT is a New Radio (NR) based wireless communication protocol.
10. A method for a network node that is in communication with a wireless device that is configured to for uplink transmission on a first carrier using a first Radio Access Technology (RAT) and on a second carrier using a second RAT, the method comprising:
determining whether to schedule the wireless device for uplink and downlink communications, in a transmission time interval (TTI), according to the first RAT based at least in part on an intermodulation distortion quantity associated with uplink communications according to both the first RAT and the second RAT; and
scheduling the wireless device according to the determination, wherein the determination whether to schedule the wireless device for uplink and downlink communications, in the TTI, according to the first RAT is based at least in part on a quality of service class associated with one of the uplink communication and downlink communication, in the TTI, according to the first RAT.
11. The method of claim 10 , wherein the intermodulation distortion quantity associated with uplink communications according to both the first RAT and second RAT corresponds to a threshold quantity.
12. The method of claim 11 , wherein the threshold quantity is based at least in part on previously received Hybrid Automatic Repeat Request (HARQ) feedbacks.
13. The method of claim 10 , further comprising scheduling the wireless device for uplink and downlink communications according to the first RAT where a number of resources used for the downlink communication according to the first RAT is based at least in part on the intermodulation distortion quantity.
14. The method of claim 10 , wherein the intermodulation distortion quantity is set to a quantity that prevents scheduling of the downlink communication according to the first RAT.
15. The method of claim 10 , further comprising avoiding a scheduling of uplink communication, in the TTI, according to the first RAT if downlink communication according to the first RAT is scheduled in the TTI.
16. The method of claim 10 , further comprising avoiding a scheduling of downlink communication, in the TTI, according to the first RAT if the uplink communication according to the first RAT is scheduled in the TTI.
17. The method of claim 10 , further comprising receiving, over a backhaul communication link, an indication indicating whether uplink communication according to the second RAT is scheduled; and
the determination whether to schedule the wireless device for uplink and downlink communications, in the TTI, according to the first RAT being based at least in part on the indication.
18. The method of claim 10 , wherein the first RAT is a Long Term Evolution (LTE) based wireless communication protocol and the second RAT is a New Radio (NR) based wireless communication protocol.
19. A network node for communication with a wireless device that is configured for uplink transmission on a first carrier using a first Radio Access Technology (RAT) and on a second carrier using a second RAT, the network node comprising processing circuitry configured to:
determine whether to schedule the wireless device for uplink and downlink communications, in a transmission time interval (TTI), according to the first RAT based at least in part on an intermodulation distortion threshold quantity associated with uplink communications according to both the first RAT and the second RAT;
schedule the wireless device according to the determination, wherein the determination whether to schedule the wireless device for uplink and downlink communications, in the TTI, according to the first RAT is based at least in part on a quality of service class associated with one of the uplink communication and downlink communication, in the TTI, according to the first RAT; and
the intermodulation threshold quantity being based at least in part on one of:
previously received Hybrid Automatic Repeat Request (HARQ) feedback; and
a Physical Resource Block (PRB) allocation for the first RAT.