HARQ operating point adaptation in communications
View Patent ↗Various embodiments are provided to address some of the current issues in establishing and adapting an HARQ operating point. Some embodiments include determining a metric that indicates the predictability of a signal to noise plus interference ratio (SINR) for signaling from a wireless device and setting a hybrid automatic repeat request (HARQ) operating point for communication with the wireless device using the metric. By setting the HARQ operating point based on a metric that indicates the predictability of SINR for wireless device signaling, throughput can be improved over present-day HARQ operating point adaptation techniques.
1. A method, comprising:
determining a metric that indicates a predictability of a signal to noise plus interference ratio (SINR) for signaling from a wireless device;
setting a hybrid automatic repeat request (HARQ) operating point for communication with the wireless device using the metric, wherein the method further comprises:
receiving a first signal from the wireless device;
predicting, using the received first signal, an estimated SINR for a second signal to be transmitted by the wireless device;
determining an actual SINR for the second signal when the second signal is received from the wireless device.
2. The method as recited in claim 1 , wherein the received first signal comprises a sounding reference signal (SRS) and
wherein determining the actual SINR comprises determining the actual SINR for the second signal when the second signal is received from the wireless device via a physical uplink shared channel (PUSCH).
3. The method as recited in claim 1 , wherein determining the metric that indicates the predictability of a SINR for signaling from the wireless device comprises
determining a correlation metric using the estimated SINR and the actual SINR.
4. The method as recited in claim 3 , wherein setting the HARQ operating point comprises determining the HARQ operating point based on the correlation metric.
5. The method as recited in claim 4 , wherein determining the HARQ operating point comprises
determining the HARQ operating point such that less HARQ transmissions are configured when the correlation metric is above a first threshold than when the correlation metric is below a second threshold, wherein the first threshold is greater than or equal to the second threshold.
6. An article of manufacture comprising a non-transitory processor-readable storage medium storing one or more software programs which when executed by one or more processors performs the steps of the method of claim 1 .
7. A transceiver node of a communication system, the transceiver node being configured to communicate with other devices in the communication system, wherein the transceiver node is operative
to determine a metric that indicates a predictability of a signal to noise plus interference ratio (SINR) for signaling from a wireless device, and
to set a hybrid automatic repeat request (HARQ) operating point for communication with the wireless device using the metric, wherein the transceiver node is further operative
to receive a first signal from the wireless device,
to predict, using the received first signal, an estimated SINR for a second signal to be transmitted by the wireless device, and
to determine an actual SINR for the second signal when the second signal is received from the wireless device.
8. The transceiver node as recited in claim 7 , wherein the received first signal comprises a sounding reference signal (SRS) and
wherein being operative to determine the actual SINR comprises being operative to determine the actual SINR for the second signal when the second signal is received from the wireless device via a physical uplink shared channel (PUSCH).
9. The transceiver node as recited in claim 7 , wherein being operative to determine the metric that indicates a predictability of a SINR for signaling from the wireless device comprises
being operative to determine a correlation metric using the estimated SINR and the actual SINR.
10. The transceiver node as recited in claim 9 , wherein being operative to set the HARQ operating point comprises being operative to determine the HARQ operating point based on the correlation metric.
11. The transceiver node as recited in claim 10 , wherein being operative to determine the HARQ operating point comprises
being operative to determine the HARQ operating point such that less HARQ transmissions are configured when the correlation metric is above a first threshold than when the correlation metric is below a second threshold, wherein the first threshold is greater than or equal to the second threshold.