HARQ-ACK handling for unintended downlink sub-frames
View Patent ↗Disclosed in some examples is a method for providing a HARQ response in an LTE network for a PUCCH format 1b. The method includes receiving one or more downlink assignments of a bundling window over a wireless downlink control channel; setting a reception status for each sub-frame of a downlink data channel in the bundling window based on whether the sub-frame on the downlink data channel was associated with a particular one of the received downlink assignments and based upon whether the sub-frame was successfully received; setting a reception status of sub-frames of the downlink data channel in the bundling window that did not have a corresponding downlink assignment to a predetermined value; and transmitting a response, the response based upon the reception statuses set by the response module.
1. A User Equipment (UE) comprising:
Hybrid Automatic Repeat Request (HARQ) circuitry arranged to:
determine that a downlink assignment index (DAI) is not equal to j+p, where p is a constant and j is the index of a downlink subframe; and
transmission circuitry arranged to:
transmit a HARQ reception status of Discontinuous Reception responsive to the determination.
2. The UE of claim 1 , further comprising receiver circuitry, and wherein the receiver circuitry is arranged to receive the DAT in the downlink subframe.
3. The UE of claim 2 , wherein the receiver circuitry is further configured to:
receive the DAI over a Physical Downlink Control Channel (PDCCH).
4. The UE of claim 3 , wherein the receiver circuitry is further configured to:
receive the DAI in a downlink Semi-Persistent Scheduling (SPS) release message over the PDCCH.
5. The UE of claim 4 , wherein the transmission circuitry is configured to transmit the HARQ reception status responsive to receiving the SPS release message.
6. A non-transitory computer-readable medium comprising instructions that, when executed on a device, cause the device to:
determine that a downlink assignment index (DAI) is not equal to j+p, where p is a constant and j is the index of a downlink subframe; and
transmission circuitry arranged to transmit a HARQ reception status of Discontinuous Reception responsive to the determination.
7. The non-transitory computer-readable medium of claim 6 , comprising instructions to further cause the device to receive the DAI in the downlink subframe.
8. The non-transitory computer-readable medium of claim 7 , comprising instructions to further cause the device to receive the DAT over a Physical Downlink Control Channel (PDCCH).
9. The non-transitory computer-readable medium of claim 8 , comprising instructions to further cause the machine to receive the DAI in a downlink Semi-Persistent Scheduling (SPS) release message over the PDCCH.
10. The non-transitory computer readable medium of claim 9 , comprising instructions to further cause the machine to transmit the HARQ reception status responsive to receiving the SPS release message.
11. An evolved NodeB (eNodeB) comprising:
a transmission module arranged to transmit a downlink sub-frame having an index value of j; and
a reception module arranged to receive a HARQ reception status of Discontinuous Reception (DTX) responsive to transmitting the downlink sub-frame with a value for a downlink assignment index (DAI) that is not equal j+p where p is a constant.
12. The eNodeB of claim 11 , e transmission module transmits the DM over a PDCCH.
13. The eNodeB of claim 12 , wherein the transmission module transmits the DM in a downlink Semi-Persistent Scheduling (SPS) release message over the PDCCH.
14. The eNodeB of claim 11 , wherein the eNodeB is arranged to operate in a Time Division Duplex (TDD) mode.
15. The eNodeB of claim 11 , wherein the reception module is arranged to receive multiplexed HARQ reception statuses for a plurality of downlink sub-frames, the plurality of downlink sub-frames comprising a bundling window of M downlink sub-frames.
16. A non-transitory computer-readable medium comprising instructions that, when executed on a device, cause the device to:
transmit a downlink sub-frame having an index value of j; and
receive a HARQ reception status of Discontinuous Reception (DTX) responsive to transmitting the downlink sub-frame with a value for a downlink assignment index (DM) that is not equal to j+p where p is a constant.
17. The non-transitory computer-readable medium of claim 16 , comprising instructions that further cause the device to:
transmit the DAI over a PDCCH.
18. The non-transitory computer-readable medium of claim 17 , comprising instructions that further cause the device to:
transmit the DAT in a downlink Semi-Persistent Scheduling (SPS) release message over the PDCCH.
19. The non-transitory computer-readable medium of claim 16 , wherein the device is arranged to operate in a Time Division Duplex (TDD) mode.
20. The non-transitory computer-readable medium of claim 16 , wherein instructions further cause the device to:
receive multiplexed HARQ reception statuses for a plurality of downlink sub-frames, the plurality of downlink sub-frames comprising a bundling window of M downlink sub-frames.