FIELD: communication.
SUBSTANCE: invention relates to communication technology; it can be used in wireless communication systems. A narrowband channel is used that is intended for being used in a subframe for uplink data transmission, when switching from the first narrowband channel that is intended for being used in the first subframe to the second narrowband channel that differs from the first narrowband channel and is used in the second subframe, wherein the second subframe follows the first subframe. The last one symbol of the first subframe and the first one symbol of the second subframe are cut out and set as time points of the adjustment to transmit uplink data in the first narrowband channel and the second narrowband channel.
EFFECT: increased service zone of an uplink data transmission system.
22 cl, 20 dwg
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