FIELD: radio engineering, communication.
SUBSTANCE: method comprises steps of: method includes obtaining, by a terminal, a time characteristic of a downlink radio block and a USF assigned to the terminal, where the time characteristic of the downlink radio block is used to indicate a downlink radio block for which the terminal needs to detect a USF; receiving a downlink radio block, which is sent by a network side device over a downlink PDCH; and sending uplink data or signalling over an uplink PDCH corresponding to the downlink PDCH.
EFFECT: reducing packet radio communication access conflicts.
20 cl, 8 dwg
