FIELD: mobile communication.
SUBSTANCE: sending first channel state information to a network device; and sending the second channel state information to the network device. Second channel state information includes a difference value from the first channel state information. Channel state corresponding to the second channel state information can also be determined by a difference value from the first information. To ensure normal transmission of channel state information, the amount of resources of the second channel state information is reduced by using the difference value from the first information.
EFFECT: reduced signalling overhead when transmitting second channel state information.
20 cl, 19 dwg
