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 1 b . 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:
processing 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 DAI in the downlink subframe.
3. The UE of claim 2 , wherein the receiver circuitry is further configured to:
receive the DAI in a downlink Semi-Persistent Scheduling (SPS) release message over the PDCCH.
4. The UE of claim 1 , wherein the receiver circuitry is further configured to:
receive the DAI over a Physical Downlink Control Channel (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. The UE of claim 1 , further comprising:
a touchscreen display.
7. The UE of claim 1 , further comprising:
a file storage.
8. An apparatus comprising:
means for receiving a downlink sub-frame, the downlink sub-frame having an index value j and a-downlink assignment index (DAI);
means for determining that the DAI is not equal to j+p, where p is a constant; and
means for transmitting a HARQ reception status of Discontinuous Reception (DTX) for the downlink sub-frame in response to the determination.
9. The apparatus of claim 8 , further comprising:
means for determining if there is a downlink shared channel transmission on a primary cell without a corresponding downlink control channel in a bundling window, the bundling window comprising M downlink sub-frames;
means for responsive to determining that there is a downlink shared channel without a corresponding downlink control channel, setting p to 0; and
means for responsive to determining that there are no downlink shared channels without a corresponding downlink control channel, setting p to 1.
10. The apparatus of claim 8 , wherein the HARQ reception status is transmitted using a Physical Uplink Control Channel (PUCCH) format 1 b .
11. The apparatus of claim 8 , wherein transmitting the HARQ reception status includes selecting at least one of a PUCCH uplink resource, a constellation, or a set of code input bits based upon the HARQ reception status.