US 11,683,818 B2
Operation method of communication node in millimeter wave based communication system
Soon Gi Park, Daejeon (KR); and Yong Seouk Choi, Daejeon (KR)
Assigned to Electronics and Telecommunications Research Institute, Daejeon (KR)
Filed by ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed on Sep. 27, 2021, as Appl. No. 17/486,498.
Application 17/486,498 is a division of application No. 15/919,808, filed on Mar. 13, 2018, granted, now 11,153,865.
Claims priority of application No. 10-2017-0032445 (KR), filed on Mar. 15, 2017.
Prior Publication US 2022/0015094 A1, Jan. 13, 2022
Int. Cl. H04W 72/27 (2023.01); H04W 24/02 (2009.01); H04W 36/00 (2009.01); H04W 72/21 (2023.01); H04W 72/51 (2023.01); H04W 76/19 (2018.01); H04W 88/08 (2009.01)
CPC H04W 72/27 (2023.01) [H04W 24/02 (2013.01); H04W 36/0066 (2013.01); H04W 36/0072 (2013.01); H04W 72/21 (2023.01); H04W 72/51 (2023.01); H04W 36/0055 (2013.01); H04W 76/19 (2018.02); H04W 88/085 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An operation method of a terminal in a communication system including the terminal, a master base station, a first slave base station, and a second slave base station, the operation method comprising:
when the terminal is connected to the master base station and the first slave base station, transmitting a radio resource control (RRC) measurement report message including channel state information measured by the terminal to the first slave base station via the master base station which receives the RRC measurement report message from the terminal and transmits the RRC measurement report message to the first slave base station;
when a handover procedure from the first slave base station to the second slave base station is determined to be performed based on the RRC measurement report message, receiving an RRC connection reconfiguration message indicating execution of the handover procedure from the first slave base station via the master base station which receives the RRC connection reconfiguration message from the first slave base station and transmits the RRC connection reconfiguration message to the terminal; and
establishing a first communication path between the terminal and the second slave base station by performing the handover procedure based on the RRC connection reconfiguration message,
wherein the first slave base station corresponds to a serving base station in the handover procedure, the second slave base station corresponds to a target base station in the handover procedure, the master base station is not both the serving base station and the target base station in the handover procedure, the RRC measurement report message is transmitted from the master base station to the first slave base station via a second communication path established between the master base station and the first slave base station, the RRC connection reconfiguration message is generated by the first slave base station, and the RRC connection reconfiguration message is transmitted from the first slave base station to the master base station via the second communication path.