| 摘要 |
PROBLEM TO BE SOLVED: To achieve seamless handover between base stations using different frequency bands.SOLUTION: In response to start of handover from a base station 14-1 to a base station 14-2 by a mobile station 12, the base station 14-2 determines an ANCH 2 to be allocated to the mobile station 12 in a frequency band the base station 14-2 is using, and notifies the mobile station 12 of the determined ANCH 2 via a CCH (S100-S102). If the frequency difference between an ANCH 1 and the ANCH 2 is equal to or less than a frequency bandwidth the mobile station 12 uses, the mobile station 12 shifts its frequency band in use from the frequency band in use of the base station 14-1 to a frequency band including the ANCH 1 and ANCH 2 (S108). After that, the mobile station 12 establishes connection with the base station 14-2 via the ANCH 2 (S110-S120), then disconnects connection with the base station 14-1 (S122), and further shifts its frequency band in use to the frequency band of the base station 14-2 (S124). |
