Title:
通信ハンドオフのための方法および装置
Document Type and Number:
Japanese Patent JP5226779
Kind Code:
B2
Abstract:
Seamless communication handoff is achieved by establishing a protocol tunnel to route leftover packets between network access nodes during the handoff. For example, in a mobile IP-based system, a mobile node may perform a handoff from a first access node that is associated with a first routing node to a second access node that is associated with a second routing node. To prevent the loss of any packets that may be in route for delivery to or from the first routing node during the handoff, the mobile node establishes a protocol tunnel with the first access node via the second access node. On the forward-link, packets being delivered from the first routing node are routed over the protocol tunnel to the second access node and then to the mobile node. On the reverse-link, packets being sent to the first routing node are routed over the protocol tunnel from the mobile node to the second access node and then to the first routing node. In conjunction with these operations, the mobile node concurrently maintains separate IP interfaces for the routing nodes. In addition, steps are taken to ensure that packets are routed to the appropriate IP interface during the handoff.
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Inventors:
Tinna Korn Srisphap, Pirapol
Urpinar, Fatty
One, Jun
Agache, Parag Arun
Urpinar, Fatty
One, Jun
Agache, Parag Arun
Application Number:
JP2010510529A
Publication Date:
July 03, 2013
Filing Date:
May 30, 2008
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04W36/18
Domestic Patent References:
| JP2009500980A | ||||
| JP2008502217A |
Foreign References:
| WO2007011137A1 | ||||
| WO2005119990A1 | ||||
| WO2004107702A1 |
Other References:
Radio Link Layer for Ultra Mobile Broadband (UMB) Air Interface Specification,3GPP2 C.S0084-003-0 Version 1.0,2007年 4月
Attorney, Agent or Firm:
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen