Patent ID: 8600385
Filing Date: 2013-12-03
Classification: H04W

Abstract:
1. An interface establishing method in a handover procedure to perform a handover using a first link established between radio node apparatuses or a second link established between a radio node apparatus and a management apparatus that manages a plurality of radio node apparatuses in a radio communication system, the method comprising: managing a number of occurrences of handover performed by using the second link, each of the plurality of radio node apparatuses being specified as a target radio node apparatus in the handover performed by using the second link; transmitting an establishment instruction from the management apparatus to a first radio node apparatus accommodated by the management apparatus to establish the first link between the first radio node apparatus and a second radio node apparatus accommodated by the management apparatus when a handover request from the first radio node apparatus to the second radio node apparatus is transmitted from the first radio node apparatus to the management apparatus via the second link and when the number of occurrences of handover performed by using the second link with the second radio node apparatus as the target radio node apparatus is greater than a first threshold; establishing the first link between the first radio node apparatus and the second radio node apparatus based on the establishment instruction; and canceling the first link between the first radio node apparatus and the second radio node apparatus when a number of occurrences of handover performed by using the first link between the first radio node apparatus and the second radio node apparatus is less than a second threshold in a state where the first link between the first radio node apparatus and the second radio node apparatus is established.