An apparatus for a network node of a radio access network, comprising: at least one processor; and at least one memory including computer program code, wherein the at least one memory and computer program code are configured, with the at least one processor, to cause the apparatus to perform the following: receiving, from a radio head over a link between the radio head and the network node, a channel estimate with a first precision level, wherein the first precision level defines a first number of bits carrying the channel estimate; determining that the first precision level is not suitable for a signal processing application needing the channel estimate; determining to change the precision level and, in response to said determining, transmitting to the radio head a message requesting transfer of the channel estimate or a further channel estimate with a second precision level, wherein the second precision level defines a second number of bits carrying the channel estimate or the further channel estimate, the second number being different from the first number; receiving, from the radio head, the channel estimate or the further channel estimate with the second precision level; and using the channel estimate or the further channel estimate in signal processing. at least one processor; and at least one memory including computer program code, wherein the at least one memory and computer program code are configured, with the at least one processor, to cause the apparatus to perform the following: receiving, from a radio head over a link between the radio head and the network node, a channel estimate with a first precision level, wherein the first precision level defines a first number of bits carrying the channel estimate; determining that the first precision level is not suitable for a signal processing application needing the channel estimate; determining to change the precision level and, in response to said determining, transmitting to the radio head a message requesting transfer of the channel estimate or a further channel estimate with a second precision level, wherein the second precision level defines a second number of bits carrying the channel estimate or the further channel estimate, the second number being different from the first number; receiving, from the radio head, the channel estimate or the further channel estimate with the second precision level; and using the channel estimate or the further channel estimate in signal processing. receiving, from a radio head over a link between the radio head and the network node, a channel estimate with a first precision level, wherein the first precision level defines a first number of bits carrying the channel estimate; determining that the first precision level is not suitable for a signal processing application needing the channel estimate; determining to change the precision level and, in response to said determining, transmitting to the radio head a message requesting transfer of the channel estimate or a further channel estimate with a second precision level, wherein the second precision level defines a second number of bits carrying the channel estimate or the further channel estimate, the second number being different from the first number; receiving, from the radio head, the channel estimate or the further channel estimate with the second precision level; and using the channel estimate or the further channel estimate in signal processing. <EOS>