Pubs:2006

<bibtex> @inproceedings{170, author={C. Thorpe; S. Murphy; L. Murphy}, title={Seamless Handover in Heterogeneous Radio Access Networks}, booktitle={IT&T}, year={2006}, abstract={This paper provides a detailed discussion of the problem of Seamless Handover in Heterogeneous Radio Access Networks. Brief descriptions of several wireless access technologies are included to provide some background information and to illustrate the importance of solving the seamless handover problem for network subscribers. Several approaches to providing a handover solution have been proposed, some of which will be described and compared, in order to indicate possible directions for continuing to search for a seamless handover solution. Various problems are present in the existing solutions, and are discussed in this paper. These problems are significant enough to warrant further investigation in the handover area, and leave scope for modifications and improvements.}, keywords={Seamless Handover, Heterogenous Networks, SCTP}, pdf={christina-itt06-cameraReady.pdf}, } </bibtex> <bibtex> @inproceedings{161, author={C. Thorpe; L. Murphy}, title={A Survey of Seamless Handover in Heterogeneous Radio Access Networks}, booktitle={ACM/IEEE International Symposium on Modeling, Analysis and Simulation of Wireless and Mobile Systems}, year={2006}, abstract={This paper provides a detailed discussion of the problem of Seamless Handover in Heterogeneous Radio Access Networks. Several approaches to providing a handover solution have been proposed, some of which will be described and compared, in order to indicate possible directions for continuing to search for a seamless handover solution. Various problems are present in the existing solutions, and are discussed in this paper. }, keywords={Seamless Handover, Heterogenous Networks, SCTP}, pdf={Christina-MSWIM-Oct-2006.pdf}, } </bibtex> <bibtex> @inproceedings{213, author={J. Fitzpatrick, S. Murphy and J. Murphy}, title={An Approach to Transport Layer Handover of VoIP over WLAN}, booktitle={CCNC}, year={2006}, abstract={In this paper a transport layer handover mechanism for Voice over Internet Protocol (VoIP) using the Stream Control Transmission Protocol (SCTP) is proposed. This handover mechanism utilizes the multi-homing feature of SCTP to allow connection to multiple wireless networks. Each available wireless network is probed with simulated VoIP data to obtain network performance metrics. Handover decisions are made based on the Mean Opinion Score (MOS) calculated from the ITU-T E-Model for voice quality assessment using the obtained measurements. Implementation and simulations were carried out using the NS2 network simulator. The results show the MOS obtained using the proposed handover mechanism on IEEE 802.11b WLAN access points (APs) under varying load conditions. High correlation is shown between the MOS from the proposed handover scheme and the MOS experienced by a VoIP node present in the network. A simulation showing an SCTP endpoint handover between AP’s is presented.}, keywords={SCTP, E-Model, VoIP, Handover, Heterogeneous Networks}, } </bibtex>