专利名称：A METHOD AND APPARATUS FOR
PROVIDING QUALITY OF SERVICE TO VoIPOVER 802.11 WIRELESS LANs
发明人：ARUP, ACHARYA,DILIP, KANDLUR,ZON-YIN,
SHAE
申请号：EP03796738申请日：20031126公开号：EP1719355A4公开日：20070822
摘要：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 SessionInitiation Protocol (“SIP”) signaling for call setup with the Point Coordination Functionmode of operation of the 802.11 medium access control. The result is that VoIP callsignaling via SIP is tied with availability of periodic time-slots on the wireless medium. Theperiodic time-slots are used to guarantee contention-free access to the wireless link forvoice packets. Accordingly, the present invention, in effect, merges two networkingtechnologies: SIP-based VoIP and 802.11-based wireless LANs.
申请人：INTERNATIONAL BUSINESS MACHINES CORPORATION
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