CPC H04W 72/21 (2023.01) [H04L 5/001 (2013.01); H04L 5/0032 (2013.01); H04L 5/0053 (2013.01); H04W 24/02 (2013.01); H04W 74/0833 (2013.01); H04W 76/10 (2018.02); H04W 88/06 (2013.01); H04W 92/20 (2013.01)] | 14 Claims |
1. A method performed by a master base station in a wireless communication system where a terminal is capable of performing a dual connectivity (DC) operation with the master base station and a secondary base station, the method comprising:
transmitting, to a terminal, a radio resource control (RRC) reconfiguration message including a first measurement configuration of at least one of an A3 event or an A5 event for a primary cell for a master base station and a second measurement configuration of at least one of an A3 event or an A5 event for a primary cell for a secondary base station;
receiving, from the terminal, a measurement report determined based on the RRC reconfiguration message;
transmitting, to the secondary base station, a request message including a measurement result for one or more cells based on the measurement report; and
receiving, from the secondary base station, a response message including configuration information for change of a primary cell for the secondary base station as a response to the request message,
wherein the A3 event for the primary cell for the master base station is triggered when a neighboring cell becomes offset better than the primary cell for the master base station,
wherein the A5 event for the primary cell for the master base station is triggered when the primary cell for the master base station becomes worse than a first threshold and a neighboring cell becomes better than a second threshold,
wherein the A3 event for the primary cell for the secondary base station is triggered when a neighboring cell becomes offset better than the primary cell for the secondary base station, and
wherein the A5 event for the primary cell for the secondary base station is triggered when the primary cell for the secondary base station becomes worse than the first threshold and a neighboring cell becomes better than the second threshold.
|