A method for transmitting channel measurements from, a user equipment, UE, to a base station in a wireless communication system, the method comprising: receiving measurement configuration message including absolute time information, cycle information, and duration information; obtaining measurement information based on the measurement configuration message; logging the measurement information cyclically based on the cycle information, and stopping the logging based on the duration information; and transmitting a message including the absolute time information, relative time information, location information, cell identity information, and the logged measurement information to the base station, wherein the logged measurement information comprises reference signal received power, RSRP, information and reference signal received quality, RSRQ, information, wherein the relative time information indicates time of the logged measurement information and is measured relative to the absolute time information, and wherein the relative time information is a value in seconds and has a fixed number of bits; and further comprising: determining whether the relative time information can be expressed with the size of a bit field having a fixed number of bits; logging, if the relative time information can be expressed with the size of the bit field, the relative time information in the bit field; and resetting the relative time information, if the relative time information cannot be expressed with the size of the bit field. receiving measurement configuration message including absolute time information, cycle information, and duration information; obtaining measurement information based on the measurement configuration message; logging the measurement information cyclically based on the cycle information, and stopping the logging based on the duration information; and transmitting a message including the absolute time information, relative time information, location information, cell identity information, and the logged measurement information to the base station, wherein the logged measurement information comprises reference signal received power, RSRP, information and reference signal received quality, RSRQ, information, wherein the relative time information indicates time of the logged measurement information and is measured relative to the absolute time information, and wherein the relative time information is a value in seconds and has a fixed number of bits; and further comprising: determining whether the relative time information can be expressed with the size of a bit field having a fixed number of bits; logging, if the relative time information can be expressed with the size of the bit field, the relative time information in the bit field; and resetting the relative time information, if the relative time information cannot be expressed with the size of the bit field. determining whether the relative time information can be expressed with the size of a bit field having a fixed number of bits; logging, if the relative time information can be expressed with the size of the bit field, the relative time information in the bit field; and resetting the relative time information, if the relative time information cannot be expressed with the size of the bit field. <EOS>