Power control for feedback signaling
There is disclosed a method of operating a user equipment in a radio access network. The method includes transmitting feedback signaling pertaining to a plurality of cells, the feedback signaling being transmitted at a power level, the power level being based on a difference between a value V and a value U, the value V being indicative of the total number of scheduling assignments the user equipment is expected to receive for the plurality of cells, and the value U being indicative of the total number of scheduling assignments for the plurality of cells received by the user equipment. The disclosure also pertains to related devices and methods.
1. A method of operating a user equipment in a New Radio, NR, radio access network, the method comprising transmitting Hybrid Automatic Repeat Request, HARQ, feedback signaling pertaining to a plurality of cells in a carrier aggregation, the HARQ feedback signaling being transmitted at a power level, the power level being based on a value ((V−U)mod 4)×NB, where: V is one of a largest counter Downlink Assignment Indicator, DAI, received for the carrier aggregation, and a total DAI received for the carrier aggregation; U is a number of scheduling assignments received for the cells of the carrier aggregation; and NB is a value indicative of a number of bits to be included in the HARQ feedback signaling per missed scheduling assignment.
2. The method according to claim 1 , wherein the HARQ feedback signaling comprises a maximum number of bits of feedback information, wherein the maximum is 11 bits.
3. The method according to claim 1 , wherein the HARQ feedback signaling is transmitted on a control channel.
4. The method according to claim 1 , wherein V pertains to a total number of scheduling assignments to which the HARQ feedback signaling pertains.
5. The method according to claim 1 , wherein V is determined based on a total downlink assignment indication received in a scheduling assignment, the scheduling assignment being represented by a Downlink Control Information, DCI, transmission having DCI format 1_1.
6. The method according to claim 1 , wherein V is determined based on a counter downlink assignment indication received in a scheduling assignment.
7. The method according to claim 1 , wherein U pertains to all of the plurality of cells.
8. The method according to claim 1 , wherein the HARQ feedback signaling is at one transmission occasion according to a HARQ codebook dynamically determined based on the received scheduling assignments.
9. A user equipment for a New Radio, NR, radio access network, the user equipment being configured to transmit Hybrid Automatic Repeat Request, HARQ, feedback signaling pertaining to a plurality of cells in a carrier aggregation, the HARQ feedback signaling being transmitted at a power level, the power level being based on a value ((V−U)mod 4)×NB, where: V is one of the largest counter Downlink Assignment Indicator, DAI, received for the carrier aggregation, and a total DAI received for the carrier aggregation; U is the number of scheduling assignments received for the cells of the carrier aggregation; and NB is a value indicative of a number of bits to be included in the HARQ feedback signaling per missed scheduling assignment.
10. The user equipment according to claim 9 , wherein the HARQ feedback signaling comprises a maximum number of bits of feedback information, wherein the maximum is 11 bits.
11. The user equipment according to claim 9 , wherein the HARQ feedback signaling is transmitted on a control channel.
12. The user equipment according to claim 9 , wherein V pertains to a total number of scheduling assignments to which the HARQ feedback signaling pertains.
13. The user equipment according to claim 9 , wherein V is determined based on a total downlink assignment indication received in a scheduling assignment, the scheduling assignment being represented by a Downlink Control Information, DCI, transmission having DCI format 1_1.
14. The user equipment according to claim 9 , wherein V is determined based on a counter downlink assignment indication received in a scheduling assignment.
15. The user ser equipment according to claim 9 , wherein U pertains to all of the plurality of cells.
16. The user equipment according to claim 9 , wherein the HARQ feedback signaling is at one transmission occasion according to a HARQ codebook dynamically determined based on the received scheduling assignments.