Method and apparatus for handover in heterogeneous cellular networks

摘要

A method at a user equipment for handover from a serving cell to a target cell, the method comprising sending a measurement report to the serving cell; and transmitting a reconfiguration complete message to the target cell; wherein the measurement report includes downlink timing measurements for the target cell. Further, a method at a source network element for handover of a user equipment from the source network element to a target network element, the method comprising receiving a measurement report from the user equipment; sending a handover request to the target network element; receiving a handover request acknowledgement from the target network element, the handover request acknowledgement including a reconfiguration message and at least one downlink subframe in which an uplink grant is expected at the target network element for the user equipment; and forwarding the reconfiguration message and at least one downlink subframe to the user equipment.

主权项

1. A method at a user equipment for handover from a serving cell to a target cell, the method comprising:
measuring, at the user equipment, a downlink difference between times of arrival for the target cell and the serving cell; sending a measurement report to the serving cell, the measurement report including the downlink difference between times of arrival for the target cell and the serving cell; and transmitting a RRCReconfigurationComplete message to the target cell, wherein the transmitting comprises adjusting uplink transmit timing at the user equipment based on the downlink difference between times of arrival for the target cell and the serving cell.