CPC H04W 36/26 (2013.01) [H04L 1/18 (2013.01); H04L 1/22 (2013.01); H04W 12/04 (2013.01); H04W 12/08 (2013.01); H04W 28/04 (2013.01); H04W 28/06 (2013.01); H04W 36/0027 (2013.01); H04W 36/0055 (2013.01); H04W 80/08 (2013.01)] | 16 Claims |
9. A terminal in a wireless communication system, the terminal comprising:
a transceiver; and
a controller configured to:
control the transceiver to receive, from a base station, first information indicating an activation of protocol data convergence protocol (PDCP) duplication,
control the transceiver to transmit, to the base station, a first PDCP protocol data unit (PDU) on a first logical channel and a second PDCP PDU same as the first PDCP PDU on a second logical channel, based on the first information, wherein, based on logical channel mapping restrictions, a first packet corresponding to the first PDCP PDU from the first logical channel is only mapped to a first serving cell and a second packet corresponding to the second PDCP PDU from the second logical channel is only mapped to a second serving cell,
identify whether the second serving cell includes only a secondary cell (SCell), in case that a radio link control (RLC) entity corresponding to the second logical channel reaches a maximum number of retransmissions for the second PDCP PDU,
in case that the second serving cell includes only the SCell, control the transceiver to transmit, to the base station, information on the second logical channel, and
in case that the second serving cell includes a primary cell (PCell), detect a radio link failure (RLF),
wherein the logical channel mapping restrictions of the first logical channel and the second logical channel are not applied based on a deactivation of the PDCP duplication, and packets from the first logical channel and the second logical channel are mapped to any configured serving cell, in case that the logical channel mapping restrictions are not applied.
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