Prioritization of scheduling request and ACK/NACK
Systems and methods for determining priority of different types of overlapping transmission are provided. When an ACK/NACK PUCCH resource overlaps with a scheduling request PUCCH resource, based on the determined relative priorities of the ACK/NACK and the scheduling request, a wireless device can determine which transmission should be prioritized and transmitted.
1. A method performed by a wireless device, the method comprising:
determining that an acknowledgement/negative acknowledgement (ACK/NACK) transmission and a scheduling request (SR) transmission will overlap in Physical Uplink Control Channel (PUCCH) resources;
determining a priority associated with the ACK/NACK transmission, wherein the priority associated with the ACK/NACK transmission is determined at least in part based on a Downlink Control Information (DCI) message transmitted on a Physical Downlink Control Channel (PDCCH) and a priority level associated with a PUCCH resource carrying the ACK/NACK transmission;
comparing the priority associated with the ACK/NACK transmission with a priority associated with the SR transmission to determine which transmission has a higher relative priority; and
transmitting the transmission with the higher relative priority.
2. The method of claim 1 , further comprising, determining a priority associated with the SR transmission.
3. The method of claim 2 , wherein the priority associated with the SR transmission is determined in accordance with a priority level associated with a logical channel associated with the SR transmission.
4. The method of claim 1 , wherein the priority associated with the ACK/NACK transmission is determined in accordance with at least one of a Physical Downlink Control Channel (PDCCH) property, a Physical Downlink Shared Channel (PDSCH) property and a PUCCH property.
5. The method of claim 1 , wherein the priority associated with the ACK/NACK transmission is determined at least in part based on a characteristic of a scheduling PDCCH transmission.
6. The method of claim 5 , wherein the characteristic includes at least one of a search space and a control resource set used for the PDCCH transmission.
7. The method of claim 6 , wherein a priority level of the search space is derived from a periodicity of the search space.
8. The method of claim 1 , wherein the priority associated with the ACK/NACK transmission is determined at least in part based on an aggregation level associated with the PDCCH.
9. The method of claim 1 , wherein the DCI message includes at least one of a modulation and coding scheme, a code rate, a modulation order, an indication of reference signal pattern, a time-domain resource allocation, a cyclic redundancy check (CRC) length, and a multiple input multiple output (MIMO) transmission scheme.
10. The method of claim 1 , wherein the priority associated with the ACK/NACK transmission is determined at least in part based on a Radio Network Temporary Identifier (RNTI) value associated with the wireless device.
11. The method of claim 1 , wherein, responsive to determining the ACK/NACK transmission and the SR transmission have a same relative priority, transmitting the transmission having an earlier transmission time.
12. The method of claim 1 , further comprising, one of cancelling or interrupting the transmission with a lower relative priority.
13. A wireless device comprising a radio interface and processing circuitry configured to:
determine that an acknowledgement/negative acknowledgement (ACK/NACK) transmission and a scheduling request (SR) transmission will overlap in PUCCH resources;
determine a priority associated with the ACK/NACK transmission, wherein the priority associated with the ACK/NACK transmission is determined at least in part based on a Downlink Control Information (DCI) message transmitted on a Physical Downlink Control Channel (PDCCH) and a priority level associated with a PUCCH resource carrying the ACK/NACK transmission;
compare the priority associated with the ACK/NACK transmission with a priority associated with the SR transmission to determine which transmission has a higher relative priority; and
transmit the transmission with the higher relative priority.
14. The wireless device of claim 13 , further configured to determine a priority associated with the SR transmission.
15. The wireless device of claim 14 , wherein the priority associated with the SR transmission is determined in accordance with a priority level associated with a logical channel associated with the SR transmission.
16. The wireless device of claim 13 , wherein the priority associated with the ACK/NACK transmission is determined in accordance with at least one of a Physical Downlink Control Channel (PDCCH) property, a Physical Downlink Shared Channel (PDSCH) property and a PUCCH property.
17. The wireless device of claim 13 , wherein the priority associated with the ACK/NACK transmission is determined at least in part based on a characteristic of a scheduling PDCCH transmission.
18. The wireless device of claim 17 , wherein the characteristic includes at least one of a search space and a control resource set used for the PDCCH transmission.
19. The wireless device of claim 18 , wherein a priority level of the search space is derived from a periodicity of the search space.
20. The wireless device of claim 13 , wherein the priority associated with the ACK/NACK transmission is determined at least in part based on an aggregation level associated with the PDCCH.
21. The wireless device of claim 13 , wherein the DCI message includes at least one of a modulation and coding scheme, a code rate, a modulation order, an indication of reference signal pattern, a time-domain resource allocation, a cyclic redundancy check (CRC) length, and a multiple input multiple output (MIMO) transmission scheme.
22. The wireless device of claim 13 , wherein the priority associated with the ACK/NACK transmission is determined at least in part based on a Radio Network Temporary Identifier (RNTI) value associated with the wireless device.
23. The wireless device of claim 13 , further configured to, responsive to determining the ACK/NACK transmission and the SR transmission have a same relative priority, transmit the transmission having an earlier transmission time.
24. The wireless device of claim 13 , further configured to, one of cancel or interrupt the transmission with a lower relative priority.