Handover method and apparatus in wireless communication system
First Claim
1. A method of handover control by a user equipment in a wireless communication system, the method comprising:
- receiving a radio resource control (RRC) connection reconfiguration message from a source cell;
determining whether a full configuration option is configured in the received RRC connection reconfiguration message;
if the full configuration option is determined to be configured in the received RRC connection reconfiguration message;
storing a current value of a parameter used in a connection with the source cell, andresetting the current value of the parameter; and
performing an encryption and integrity verification using the reset value of the parameter.
1 Assignment
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Accused Products
Abstract
The present disclosure provides a method for correcting an error caused by Hyper Frame Number (HFN) and Packet Data Convergence Protocol Sequence Number (PDCP SN) mismatch between a user equipment and base station when the user equipment fails in handover between cells in a wireless communication system. In addition, the present disclosure provides a handover procedure for a user equipment performing handover from a macro cell to a Closed Subscriber Group (CSG) cell shared by multiple operators in a wireless communication system. The present disclosure enables a user equipment and base station to perform communication without a malfunction after handover failure. For handover from a macro cell to a CSG cell shared by multiple operators, the present disclosure enables a user equipment to perform handover to an accessible cell.
8 Citations
10 Claims
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1. A method of handover control by a user equipment in a wireless communication system, the method comprising:
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receiving a radio resource control (RRC) connection reconfiguration message from a source cell; determining whether a full configuration option is configured in the received RRC connection reconfiguration message; if the full configuration option is determined to be configured in the received RRC connection reconfiguration message; storing a current value of a parameter used in a connection with the source cell, and resetting the current value of the parameter; and performing an encryption and integrity verification using the reset value of the parameter. - View Dependent Claims (2, 3, 4, 5)
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6. A user equipment supporting handover control in a wireless communication system, the user equipment comprising:
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a transceiver configured to; send signals to a source cell and a target cell, and receive signals from the source cell and the target cell; and a controller configured to; control the transceiver to receive a radio resource control (RRC) connection reconfiguration message from the source cell, determine whether a full configuration option is configured in the received RRC connection reconfiguration message, if the full configuration option is determined to be configured in the received RRC connection reconfiguration message, store a current value of a parameter used in a connection with the source cell and reset the current value of the parameter, and perform an encryption and integrity verification using the reset value of the parameter. - View Dependent Claims (7, 8, 9, 10)
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Specification