Methods for conditional handover

A method performed by a wireless transmit/receive unit (WTRU), the method comprising:

• receiving a message including conditional handover (CHO) configuration information, the CHO configuration information identifying one or more CHO candidate cells and the CHO configuration information indicating:
• one or more CHO trigger conditions associated with the one or more CHO candidate cells, one or more measurement trigger conditions associated with one or more non-CHO candidate cells, and measurement reporting eligibility criteria associated with a serving cell;
• on a condition that a CHO trigger condition associated with at least one of the one or more CHO candidate cells is fulfilled, at least one of the one or more measurement trigger conditions associated with one or more non-CHO candidate cells is fulfilled, and the serving cell does not meet the measurement reporting eligibility criteria:
• executing a handover procedure towards the CHO candidate cell for which the CHO trigger condition is fulfilled;
• and
• sending, to a network node associated with the CHO candidate cell, a message indicating completion of the handover procedure and reporting a measurement of a signal associated with the one or more of the non-CHO candidate cells.

A wireless transmit/receive unit (WTRU), the WTRU comprising:

• a processor;
• and
• a transceiver;
• the transceiver configured to receive a message including conditional handover (CHO) configuration information, the CHO configuration information identifying one or more CHO candidate cells and the CHO configuration information indicating:
• one or more CHO trigger conditions associated with the one or more CHO candidate cells, one or more measurement trigger conditions associated with one or more non-CHO candidate cells, and measurement reporting eligibility criteria associated with a serving cell;
• on a condition that a CHO trigger condition associated with at least one of the one or more CHO candidate cells is fulfilled, at least one of the one or more measurement trigger conditions associated with one or more non-CHO candidate cells is fulfilled, and the serving cell meets the measurement reporting eligibility criteria:
• the processor and the transceiver are configured to refrain from executing a handover procedure towards the CHO candidate cell for which the CHO trigger condition is fulfilled;
• and
• the processor and the transceiver are configured to send, to a network node associated with the CHO candidate cell, a message reporting a measurement of a signal associated with the one or more of the non-CHO candidate cells.