Title:
802.11無線LANを通じたVoIPへのQoSを提供するための方法及び装置
Document Type and Number:
Japanese Patent JP4216284
Kind Code:
B2
Abstract:
The present invention provides a method and system for providing quality-of-service to VoIP over a wireless local access network by providing periodic, contention-free access to a wireless link for voice packets. This is achieved by coupling Session Initiation Protocol (“SIP”) signaling for call setup with the Point Coordination Function mode of operation of the 802.11 medium access control. The result is that VoIP call signaling via SIP is tied with availability of periodic time-slots on the wireless medium. The periodic time-slots are used to guarantee contention-free access to the wireless link for voice packets. Accordingly, the present invention, in effect, merges two networking technologies: SIP-based VoIP and 802.11-based wireless LANs.
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Inventors:
Arup, Acharya
Diplip, Kanduru
Zone Inn, Shay
Diplip, Kanduru
Zone Inn, Shay
Application Number:
JP2005512847A
Publication Date:
January 28, 2009
Filing Date:
November 26, 2003
Export Citation:
Assignee:
INTERNATIONAL BUSINESS MASCHINES CORPORATION
International Classes:
H04W74/04; H04L12/56; H04L29/06; H04W74/06; H04W76/02; H04W80/10; H04W84/12; H04W88/16
Domestic Patent References:
| JP2003258879A | ||||
| JP2003506967A | ||||
| JP2005080157A |
Other References:
松倉隆一、山内仁、奥山敏、松田正宏,無線LANにおけるVoIPの高品質通信方式の検討,電子情報通信学会技術研究報告 CQ2003-48,日本,電子情報通信学会,2003年 8月28日,Vol.103 No.289,p37-42
Part11:Wireless LAN Medium Access Control(MAC) and Physical Layer(PHY) specifications,1997年 6月26日,P.47,51-52
A. Johnston,Session Initiation Protocol Basic Call Flow Examples,draft-ietf-sipping-basic-call-flows-00.txt ,2002年 8月,P.61-62,URL,http://www.tools.ietf.org/html/draft-ietf-sipping-basic-call-flows-00
平栗 健史 Takefumi HIRAGURI,電子情報通信学会2003年通信ソサイエティ大会講演論文集1 PROCEEDINGS OF THE 2003 IEICE COMMUNICATIONS SOCIETY CONFERENCE,2003年 9月10日
Part11:Wireless LAN Medium Access Control(MAC) and Physical Layer(PHY) specifications,1997年 6月26日,P.47,51-52
A. Johnston,Session Initiation Protocol Basic Call Flow Examples,draft-ietf-sipping-basic-call-flows-00.txt ,2002年 8月,P.61-62,URL,http://www.tools.ietf.org/html/draft-ietf-sipping-basic-call-flows-00
平栗 健史 Takefumi HIRAGURI,電子情報通信学会2003年通信ソサイエティ大会講演論文集1 PROCEEDINGS OF THE 2003 IEICE COMMUNICATIONS SOCIETY CONFERENCE,2003年 9月10日
Attorney, Agent or Firm:
Hiroshi Sakaguchi
Yoshihiro City
Takeshi Ueno
Tasaichi Tanae
Kazuo Moriya
Hiromichi Watanabe
Yoshihiro City
Takeshi Ueno
Tasaichi Tanae
Kazuo Moriya
Hiromichi Watanabe