Patent ID: 9402210
Filing Date: 2016-07-26
CPC Classification: H04W

Claim Text:
1. A wireless communication system including a first wireless base station connected to a wireless communication terminal and a second wireless base station, the first wireless base station comprising: a first memory, and a first processor coupled to the first memory, wherein the first processor includes: a target cell extracting unit that extracts a handover destination cell of the wireless communication terminal; a target cell notifying unit that notifies first handover (HO) preparation information, which is information for handover of the wireless communication terminal including information about the handover destination cell, to the second wireless base station accommodating the handover destination cell; and a subsequent candidate cell notifying unit that receives, from the second wireless base station, information about a subsequent candidate cell which is a candidate of handover destination other than the handover destination cell, and notifies second HO preparation information including the information about the subsequent candidate cell to a wireless base station accommodating the subsequent candidate cell, the second wireless base station comprising: a second memory, and a second processor coupled to the second memory, wherein the second processor includes: a subsequent candidate cell extracting unit that obtains the information about the handover destination cell from the received first HO preparation information, and when an adjustment of a wireless parameter which comprises a power control, a handover control, a random access control, or an antenna angle adjustment for an adjacent cell is performed at the handover destination cell and when the wireless parameter at the handover destination cell satisfies either that the wireless parameter is being adjusted or that the elapsed time since the wireless parameter adjustment is within a predetermined time, extracts a specific cell as the subsequent candidate cell from among a plurality of first cells accommodated by the second wireless base station and a plurality of second cells accommodated by a wireless base station which has a control connection with the first cells, the specific cell receiving handover from the handover destination cell for a number of times equal to or more than a predetermined number of times; and a subsequent candidate cell notifying unit that notifies the subsequent candidate cell to the first wireless base station.