The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2012
Filed:
Dec. 04, 2008
Taichi Tashiro, Fuchu, JP;
Keiji Yamamoto, Ome, JP;
Taichi Tashiro, Fuchu, JP;
Keiji Yamamoto, Ome, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
According to this invention, there is provided a method applicable to the system which comprises a plurality of base stations each forming radio zones and storing a mobile terminal, and a gateway being connected to a packet communication network and relaying packet communication between the packet communication network and the mobile terminal. The method comprises buffering packets transmitted by a downlink to the mobile terminal in a packet buffer, requiring retransmission of unarrived packets in handover accompanied by movement among the radio zones, reading the packet required from the mobile terminal to retransmit the packet to the mobile terminal that is a request source, and assigning serial identification numbers to packets at least in a start to an end of the handover. When the identification numbers of the reached packets are discontinuous, the mobile terminal requires retransmission of packets needed to eliminate the discontinuity.