Method and apparatus for detecting unreliable uplink control information
A method of operating a network node in a communications network that includes a communication device is provided. The method can include receiving uplink control information, UCI, from the communication device. The method can further include determining whether the UCI is reliable based on a maximum distance and a threshold value.
1 . A method of operating a network node in a communications network that includes a communication device, the method comprising:
receiving uplink control information, UCI, from the communication device;
generating a threshold value look-up table based on an optimization algorithm that maximizes a probability that any UCI received from the communication device is reliable while ensuring that a predetermined block error rate, BLER, is satisfied;
determining a threshold value using the threshold value look-up table; and
determining whether the UCI is reliable based on a maximum distance and the threshold value,
wherein the UCI comprises CSI part 1; and
wherein the maximum distance is a metric indicating a correlation between received decoded soft values of the CSI part 1 and each codewords of a codebook associated with a receiver of the network node.
2 . The method of claim 1 , wherein determining whether the UCI is reliable comprises comparing the maximum distance and the threshold value.
3 . The method of claim 1 , further comprising:
responsive to determining that the UCI is unreliable, scheduling communication with the communication device using previously provided information.
4 . The method of claim 1 , further comprising:
responsive to determining that the UCI is reliable, scheduling communication with the communication device using the UCI.
5 . The method of claim 1 , wherein the CSI part 1 comprises at least one of: a rank; a channel quality indicator, CQI; and a CSI-resource indicator, CRI.
6 . The method of claim 1 , wherein receiving the UCI comprises receiving the UCI multiplexed with data or receiving the UCI scheduled in a physical uplink shared channel, PUSCH, without data.
7 . The method of claim 1 , further comprising:
decoding data associated with the UCI based on the UCI.
8 . The method of claim 1 , wherein ensuring that the predetermined BLER is satisfied comprises ensuring that a probability of the UCI being reliable and being decoded as not reliable is less than or equal to 0.1%.
9 . The method of claim 1 , wherein determining the threshold value comprises determining the threshold value using the threshold value look-up table based on at least one of: a number of resource blocks; a number of receive antennas; and a beamforming scheme used.
10 . The method of claim 1 , wherein the UCI has a length of greater than or equal to 3 bits.
11 . The method of claim 1 , wherein the UCI has a length of less than or equal to 11 bits.
12 . The method of claim 1 , wherein the communications network is a 5 th generation, 5G, network, and
wherein the network node is a radio access network, RAN, node.
13 . A network node in a communications network that includes a communication device, the network node comprising:
processing circuitry; and
memory coupled with the processing circuitry, wherein the memory includes instructions that when executed by the processing circuitry causes the network node to perform operations according to claim 1 .
14 . A non-transitory computer-readable medium comprising program code to be executed by processing circuitry of a network node in a communications network that includes a communication device, whereby execution of the program code causes the network node to perform operations according to claim 1 .