After receiving the SgNB Release request message, the S-SN may transmit an SNstatus transfer to the MN (operation 10-100). The MN having received the message transmits the SN status transfer to an sCHO target node again (operation 10-105).
After transmitting the SN status transfer, the S-SN performs data forwarding to the MN (operation 10-110), and the MN also performs data forwarding to the target SN (operation 10-115). After transmitting the SNstatusTransfer and performing data forwarding, the MN may perform an E-RAB modification procedure after data forwarding (operation 10-120), and may allow the S-SN to perform a UE context release (operation 10-125).
As another embodiment of the disclosure,