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Handover for a portable communication device between local and wide area wireless networks
OptiMobile AB.
Uppsala University, Disciplinary Domain of Science and Technology, Mathematics and Computer Science, Department of Information Technology, Computer Architecture and Computer Communication. (Communication Research)
OptiMobile AB.
OptiMobile AB.
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2015 (English)Patent (Other (popular science, discussion, etc.))
Abstract [en]

The present invention relates to a method, call handling server (18), local wireless network (10) and computer program product for performing vertical handover of a wireless voice connection, which is a part of a voice connection set up between a portable communication (22) device and another device. The network comprises a number of access points (20) and the call handling server (18) for controlling voice connections to the portable device. The server comprises a control unit (24) that determines a handover situation for the wireless connection to the portable device based on a set of handover factors that comprise the position and movement of the portable communication device in an area of the local network and structural layout information of the area together with knowledge of where in this area there is insufficient coverage.

Place, publisher, year, edition, pages
Keyword [en]
Voice-over-IP, Seamless, handover, positioning
National Category
Computer Engineering
Research subject
Computer Science with specialization in Computer Communication
URN: urn:nbn:se:uu:diva-287671OAI: oai:DiVA.org:uu-287671DiVA: diva2:923298
US US20090191878 (2015-10-01)

Also published as patent: EP1712105A1, EP1712105B1, US9179387,WO2005071998A1

Available from: 2016-04-26 Created: 2016-04-26 Last updated: 2016-05-09

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