BASE STATION AND HANDOVER CONTROL METHOD

• US 20090170515A1
• Filed: 02/26/2007
• Published: 07/02/2009
• Est. Priority Date: 02/27/2006
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Hapsari, Wuri Andarmawanti, Nakamura, Takehiro, Kato, Yasuhiro, Motegi, Masayuki
• Granted Patent: US 8,666,413 B2
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04W 36/0055 Transmission or use of information for re-establishing the radio link
• CPC Class Codes: H04W 36/0064 of control information between different access points

Abstract

Embodiments of the present invention make it possible to reduce loss and delay of downlink user data transmitted at regular time intervals in a mobile communication system employing a hard handover method, and make it possible to easily perform high-quality handover solely by a handover-starting base station. A base station for transmitting downlink user data at regular time intervals to a mobile station is disclosed. The base station is configured to transmit a handover-command signal immediately after transmitting the downlink user data to the mobile station.

Claims

1. A base station for transmitting downlink user data at regular time intervals to a mobile station,

wherein the base station is configured to transmit a handover-command signal immediately after transmitting the downlink user data to the mobile station.

2. A handover control method used by a base station for transmitting downlink user data at regular time intervals to a mobile station, the method comprising the step of:

transmitting a handover-command signal immediately after transmitting the downlink user data to the mobile station.