Method of determining a bit length of an iq sample

A method of determining a bit length of an IQ sample associated with a first data frame, the method comprising:

• capturing one or more data frames between a distributed unit and a radio unit by a packet analyzer, the bit length of the IQ sample being unknown to the packet analyzer;
• determining a first parameter associated with a payload length of the first data frame;
• determining a second parameter indicative of a number of physical resource blocks in the first data frame;
• detecting a presence of a compression header based on the first parameter and the second parameter, the detecting of the presence of the compression header comprising performing, by the packet analyzer, a modulo operation on the first parameter indicative of a payload size of the first data frame, using the second parameter indicative of the number of physical resource blocks in the first data frame, to check if the payload size is a multiple of the number of physical resource blocks;
• and
• determining the bit length of the IQ sample from the detected compression header, or the first parameter and the second parameter,
• wherein the determined bit length of the IQ sample of the first data frame is used for checking a configuration of the distributed unit or the radio unit.

A packet analyzer device operable to determine a bit length of an IQ sample associated with a first data frame, the packet analyzer device comprising:

• a network interface configured to capture one or more data frames between a distributed unit and a radio unit, the bit length of the IQ sample being unknown to the packet analyzer;
• and
• a processor configured to:
• determine a first parameter associated with a payload length of the first data frame;
• determine a second parameter indicative of a number of physical resource blocks in the first data frame;
• detect a presence of a compression header based on the first parameter and the second parameter, the detection of the presence of the compression header comprising performance, by the packet analyzer, of a modulo operation on the first parameter indicative of a payload size of the first data frame, using the second parameter indicative of the number of physical resource blocks in the first data frame, to check if the payload size is a multiple of the number of physical resource blocks;
• and
• determine the bit length of the IQ sample from the detected compression header, or the first parameter and the second parameter,
• wherein the determined bit length of the IQ sample of the first data frame is used for checking a configuration of the distributed unit or the radio unit.

A non-transitory computer-readable storage medium that stores instructions executable by one or more processors to determine a bit length of an IQ sample associated with a first network frame, the instructions comprising:

• capturing one or more data frames between a distributed unit and a radio unit by a packet analyzer, the bit length of the IQ sample being unknown to the packet analyzer;
• determining a first parameter associated with a payload length of the first data frame;
• determining a second parameter indicative of a number of physical resource blocks in the first data frame;
• detecting a presence of a compression header based on the first parameter and the second parameter, the detecting of the presence of the compression header comprising performing, by the packet analyzer, a modulo operation on the first parameter indicative of a payload size of the first data frame, using the second parameter indicative of the number of physical resource blocks in the first data frame, to check if the payload size is a multiple of the number of physical resource blocks;
• and
• determining the bit length of the IQ sample from the detected compression header, or the first parameter and the second parameter,
• wherein the determined bit length of the IQ sample of the first data frame is used for checking a configuration of the distributed unit or the radio unit.