Mobile communication terminal, broadcast information storing method, cell transfer method, and mobile communication system

A cell transfer method of carrying out a cell transfer of a mobile communication terminal while receiving broadcast information from a base station, said cell transfer method comprising:

• a cell information storing step of storing a plurality of broadcast information items received on the occasion of cell transfers, in a historical way in storing means, in correspondence with a plurality of cell identifying information items for identifying respective cells;
• a cell information receiving step of receiving cell identifying information for identifying a cell;
• an identity determining step of determining whether one of the plurality of cell identifying information items stored in said cell information storing step is identical with the cell identifying information item received in said cell information receiving step;
• a broadcast information acquiring step of, when said identity determining step results in determining that one of the plurality of cell identifying information items stored in said cell information storing step is identical with the cell identifying information item received in said cell information receiving step, acquiring a broadcast information item corresponding to the cell identifying information item determined as identical, from said storing means;
• and
• a cell transfer step of carrying out a transfer to the cell, based on the broadcast information item acquired in said broadcast information acquiring step, wherein said cell information storing step is to store a plurality of broadcast information items received on the occasion of cell transfers, in a historical way in correspondence with elapsed times since received, and
• wherein said broadcast information acquiring step is to, when an elapsed time is within a predetermined time, acquire a broadcast information item corresponding to said elapsed time.

A mobile communication terminal, comprising:

• broadcast information storing means for storing, in a historical way, a plurality of broadcast informations each being associated with a cell identifying information for identifying the relevant cell that are received in the past on the occasion of cell transfers;
• and
• determining means for receiving a cell identifying information and determining whether a current base station, from which said mobile communication terminal is currently receiving the cell identifying information, is identical to a past base station that has transmitted the broadcast information stored in said broadcast information storing means,
• wherein said mobile communication terminal receives the broadcast information from the current base station when said determining means determines that the past base stations is not identical to the current base station, and on the other hand, when said determining means determines that the past base station is identical to the current base station, reuses the broadcast information associated with the past base station and stored in said broadcast information storing means as a broadcast information of the current base station.

A mobile communication method, comprising:

• storing, in a historical way, a plurality of broadcast informations each being associated with a cell identifying information for identifying the relevant cell that are received in the past on the occasion of cell transfers;
• and
• receiving a cell identifying information and determining whether a current base station, from which said mobile communication terminal is currently receiving the cell identifying information, is identical to a past base station that has transmitted the broadcast informations stored in said broadcast information storing step,
• wherein said mobile communication terminal receives the broadcast information from the current base station when said determining step determines that the past base stations is not identical to the current base station, and on the other hand, when said determining step determines that the past base station is identical to the current base station, reuses the broadcast information associated with the past base station and stored in said storing step as a broadcast information of the current base station.

A mobile communication terminal comprising:

• broadcast information storage device configured to store, in a historical way, a plurality of broadcast informations each being associated with a cell identifying information for identifying the relevant cell that are received in the past on the occasion of cell transfers;
• and
• a determination unit configured to receive a cell identifying information and to determine whether a current base station, from which said mobile communication terminal is currently receiving the cell identifying information, is identical to a past base station that has transmitted the broadcast informations stored in said broadcast information storing device,
• wherein said mobile communication terminal is configured to receive the broadcast information from the current base station when said determination unit determines that none of the past base stations is identical to the current base station, and on the other hand, when said determination unit determines that one of the past base station is identical to the current base station, is configured to reuse the broadcast information associated with the past base station and stored in said broadcast information storing device as a broadcast information of the current base station.