METHOD AND APPARATUS FOR PERFORMING A HANDOVER IN AN EVOLVED UNIVERSAL TERRESTRIAL RADIO ACCESS NETWORK

摘要

A method and an apparatus for performing a handover in an evolved universal terrestrial radio access network (E-UTRAN) are disclosed. A wireless transmit/receive unit (WTRU) sends a measurement report to a source evolved Node B (eNB), and receives a handover command from the source eNB. The WTRU initiates reception and processing of a primary broadcast channel (P-BCH) at the target cell after receiving the handover command. The WTRU then sends a random access preamble to the target eNB, receives a random access response from the target eNB, and sends a handover complete message to the target eNB. The reception and processing of the P-BCH may be initiated immediately after receiving the handover command or after sending the handover complete message. The WTRU may apply default configuration or source cell configuration in the target cell until a target cell SFN and/or P-BCH information are acquired.

主权项

1. A method implemented in a wireless transmit/receive unit (WTRU) for performing a handover from a source cell to a target cell, the method comprising:
initiating reception of a primary broadcast channel (P-BCH) of the target cell after receiving a handover command from an evolved Node B (eNB) associated with the source cell; sending a random access preamble to an eNB associated with the target cell, the random access preamble being sent using a contention-based random access channel (RACH) procedure on condition that no dedicated RACH preamble is indicated in the handover command; applying a first mode of operation prior to acquiring a system frame number (SFN) of the target cell, wherein the first mode of operation utilizes a configuration that refrains from utilizing the SFN of the target cell; and applying a second mode of operation upon acquiring the SFN of the target cell, wherein the second mode of operation utilizes a configuration that takes into account the SFN of the target cell.