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. An evolved NodeB (eNodeB) comprising:
a transmission module arranged to transmit a downlink assignment index (DAI) over a Physical Downlink Control Channel (PDCCH) and to transmit a downlink sub-frame, the downlink sub-frame having an index value j and the sub-frame including the DAI; and
a reception module arranged to receive a HARQ reception status of Discontinuous Reception (DTX) for the downlink sub-frame responsive to transmitting the downlink sub-frame with a value for the DAI that is not equal to j+p where p is a constant.
2. The eNodeB of claim 1 , wherein the eNodeB is arranged to operate in a Time Division Duplex (TDD) mode.
3. The eNodeB of claim 1 , 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.
4. The eNodeB of claim 3 , wherein
p equals 0 if a Primary Downlink Shared Channel (PDSCH) is transmitted without a corresponding PDCCH within the bundling window comprising M downlink sub-frames; and
p equals 1 if there are no PDSCH transmitted without a corresponding PDCCH within the bundling window comprising M downlink sub-frames.
5. The eNodeB of claim 4 , wherein p equals 1 if there is a downlink shared channel transmission on a secondary cell with a corresponding control channel transmission on a primary cell.
6. The eNodeB of claim 1 , wherein the reception module is arranged to receive the HARQ reception status by on a PUCCH uplink resource having a constellation and a set of code input bits selected based upon the reception status.
7. The eNodeB of claim 1 , wherein the eNodeB is arranged to communicate with a wireless network using a Long Term Evolution (LTE) family of standards.
8. The eNodeB of claim 1 , wherein the reception module is arranged to receive the HARQ reception statuses on a Physical Uplink Control Channel (PUCCH) format 1b channel.
9. A non-transitory computer-readable medium comprising instructions that, when executed on a device, cause the device to:
transmit a downlink assignment index (DAI) over a Physical Downlink Control Channel (PDCCH) and to transmit a downlink sub-frame, the downlink sub-frame having an index value j and the sub-frame including the DAI; and
receive a HARQ reception status of Discontinuous Reception (DTX) for the downlink sub-frame responsive to transmitting the downlink sub-frame with a value for the DAI that is not equal to j+p where p is a constant.
10. The computer-readable medium of claim 9 , wherein the eNodeB is arranged to operate in a Time Division Duplex (TDD) mode.
11. The computer-readable medium of 9 , 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.
12. The computer-readable medium of claim 11 , wherein
p equals 0 if a Primary Downlink Shared Channel (PDSCH) is transmitted without a corresponding PDCCH within the bundling window comprising M downlink sub-frames; and
p equals 1 if there are no PDSCH transmitted without a corresponding PDCCH within the bundling window comprising M downlink sub-frames.
13. The computer-readable medium of claim 12 , wherein p equals 1 if there is a downlink shared channel transmission on a secondary cell with a corresponding control channel transmission on a primary cell.
14. The computer-readable medium of claim 9 , wherein the instructions further cause the device to receive the HARQ reception status by on a PUCCH uplink resource having a constellation and a set of code input bits selected based upon the reception status.
15. The computer-readable medium of claim 9 , wherein the instructions further cause the device to receive the HARQ reception statuses on a Physical Uplink Control Channel (PUCCH) format 1b channel.
16. A method comprising:
transmitting a downlink assignment index (DAI) over a Physical Downlink Control Channel (PDCCH) and to transmit a downlink sub-frame, the downlink sub-frame having an index value j and the sub-frame including the DAI; and
receiving a HARQ reception status of Discontinuous Reception (DTX) for the downlink sub-frame responsive to transmitting the downlink sub-frame with a value for the DAI that is not equal to j+p where p is a constant.
17. The method of claim 16 , further comprising:
receiving 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.
18. The method of claim 16 , wherein
p equals 0 if a Primary Downlink Shared Channel (PDSCH) is transmitted without a corresponding PDCCH within the bundling window comprising M downlink sub-frames; and p equals 1 if there are no PDSCH transmitted without a corresponding PDCCH within the bundling window comprising M downlink sub-frames.
19. The method of claim 18 , wherein p equals 1 if there is a downlink shared channel transmission on a secondary cell with a corresponding control channel transmission on a primary cell.
20. The method of claim 16 , further comprising:
receiving the HARQ reception status by on a PUCCH uplink resource having a constellation and a set of code input bits selected based upon the reception status.
21. The method of claim 16 , further comprising:
receiving the HARQ reception statuses on a Physical Uplink Control Channel (PUCCH) format 1b channel.