Patent ID: 9042346
Filing Date: 2015-05-26
Classification: H04W

Abstract:
1. A handover method of a mobile relay station (RS) relaying data from a subordinate terminal to a first base station (BS), the method comprising: determining, by the mobile RS, whether to perform handover from the first BS to a second BS; when it is determined to perform handover in the determining operation, receiving from the first BS, a first message including a first information indicating whether handover is admitted and a second information indicating whether or not RS configuration information of the mobile RS has been changed, wherein the RS configuration information is related to an access link information between the mobile RS and the subordinate terminal; when handover admission information is included in the first message, transmitting, by the mobile RS to the subordinate terminal, a second message including a service unavailable time during which a service is not provided to the subordinate terminal; the second message further including the second information, wherein the service unavailable time is to prevent the subordinate terminal from performing handover to a different BS or a different RS and comprises an unavailable start time and an unavailable time interval; wherein the service unavailable time is set based on a time for the mobile RS to perform network reentry procedure to the second BS, to restart relay mode operation and to provide relay service to the subordinate terminal; performing, by the mobile RS, handover to the second BS; starting, by the mobile RS, a relay mode in which data of the subordinate terminal is relayed to the second BS; and providing a service to the subordinate terminal.