Retransmission for punctured signals
A radio node is configured for use in a wireless communication system. The radio node in this regard is configured to transmit a signal that is punctured by another signal to another radio node. The radio node is also configured to estimate a probability of decoding failure that characterizes a likelihood that the another radio will fail to decode the punctured signal. The radio node is further configured to retransmit at least a punctured portion of the punctured signal if the estimated probability is above a threshold.
1. A method for a radio node to transmit punctured signals in a wireless communications system, the method comprising:
transmitting a signal that is punctured by another signal to another radio node;
estimating a probability of decoding failure that characterizes a likelihood that the another radio will fail in an attempt to decode the punctured signal based on a function of decoding factors by determining the probability of decoding failure using a look up table indexed according to the decoding factors, the decoding factors including:
a fraction of punctured bits in the punctured signal;
a code block length of the punctured signal;
a code rate of the punctured signal;
a modulation coding scheme used to the modulate and encode the punctured signal;
a signal-to-noise ratio (SNR) measured on a channel between the radio node and the another radio node; and
if the estimated probability is above a threshold, retransmitting at least a punctured portion of the punctured signal.
2. The method of claim 1 , wherein the at least a portion of the punctured signal is retransmitted before a NACK is received for the punctured signal from the another radio node.
3. The method of claim 1 , wherein the punctured signal is an enhanced Mobile Broadband (eMBB) signal and the another signal is an Ultra Reliable Low-Latency Communication (URLLC) signal.
4. The method of claim 1 , wherein the at least a portion of the punctured signal is retransmitted using pre-scheduled uplink resources.
5. The method of claim 1 , wherein the at least a portion of the punctured signal is retransmitted using uplink resources indicated by a retransmission scheduling grant.
6. The method of claim 4 , wherein the uplink resources allow retransmission of only the punctured portion of the punctured signal.
7. The method of claim 1 wherein the radio node is a wireless device and the another radio node is a radio access node.
8. The method of claim 1 wherein the radio node is a radio access node and the another radio node is a wireless device.
9. A wireless device for a wireless communications system comprising:
at least one transceiver;
at least one processor operably coupled to the at least one transceiver; and
memory comprising instructions executable by the at least one processor;
the wireless device being operable to perform a method comprising:
transmitting a signal that is punctured by another signal to another radio node;
estimating a probability of decoding failure that characterizes a likelihood that the another radio will fail in an attempt to decode the punctured signal based on a function of decoding factors by determining the probability of decoding failure using a look up table indexed according to the decoding factors, the decoding factors including:
a fraction of punctured bits in the punctured signal;
a code block length of the punctured signal;
a code rate of the punctured signal;
a modulation coding scheme used to the modulate and encode the punctured signal;
a signal-to-noise ratio (SNR) measured on a channel between the radio node and the another radio node; and
if the estimated probability is above a threshold, retransmitting at least a punctured portion of the punctured signal.
10. The wireless device of claim 9 , wherein the at least a portion of the punctured signal is retransmitted using pre-scheduled uplink resources.
11. The wireless device of claim 9 , wherein the at least a portion of the punctured signal is retransmitted using uplink resources indicated by a retransmission scheduling grant.