John Fitzpatrick Seán Murphy Mohammed Atiquzzaman John Murphy ECHO: A Quality of Service Based Endpoint Centric Handover Scheme for VoIP. 2777-2782 2008 WCNC http://dx.doi.org/10.1109/WCNC.2008.486 conf/wcnc/2008 db/conf/wcnc/wcnc2008.html#FitzpatrickMAM08