Vertical Fast Handoff Technique For Mobile IPv6 in Heterogeneous 4G Networks
Over the recent years, mobility in wireless communications has become a big interest of communication and network researches due to the rising demand on and expectations of wireless Internet access. However, since none of the existing wireless technologies can individually fulfill all the tasks a...
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2009
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my-upm-ir.73472013-05-27T07:34:49Z Vertical Fast Handoff Technique For Mobile IPv6 in Heterogeneous 4G Networks 2009-08 Solouk, Vahid Over the recent years, mobility in wireless communications has become a big interest of communication and network researches due to the rising demand on and expectations of wireless Internet access. However, since none of the existing wireless technologies can individually fulfill all the tasks arising from the Internet users’ demands, the integration or coexistence of different communication systems having different network characteristics is inevitable. This integration on the other hand, requires seamless inter-system mobility solutions. Every inter-system roaming which leads to vertical handoff requires proper interaction of both link and IP layers, since network point of attachment as well as the device interface are involved in handoff. Many investigations in standardization are being made to finally design and implement each of these communication layers. This thesis details out the whole research, which is done in two main components. As for the first component, a link layer mechanism with the notion of a selection algorithm based on weighted mean is primarily introduced for collecting link layer information and discovering the candidate access router. This mechanism is then used as handoff decision phase with an improved mobile-assisted handoff method as an extension of Fast Mobile IPv6 Handoff (FMIPv6) in vertical mode. The performance of the proposed methods is discussed using analysis and comparison of simulation results with wellknown methods in the field. The method has been shown to achieve performance improvements in terms of higher preference level of selection for various cases, and in terms of latency and packet loss, by 45% and 83% respectively, while maintaining comparatively lower buffer sizes. As the second component, a framework is proposed to incorporate an integration mode of cellular and wireless networks called semi tightly-coupled. This framework is further used to design and implement an end-to-end roaming solution as Vertical Fast Handoff (VFHO) for the integrated network. The performance of the proposed framework has been analyzed mathematically and through simulations which show the robustness of VFHO in terms of signaling cost, endto- end packet delivery cost, overall handoff latency, and packet loss based on various system variables. Under several simulations, the number of lost packets encountered by VFHO stayed as low as 20 packets when the arrival rate was a maximum of 50 packets per second, and did not exceed 10 packets in the case when packet sizes was at a maximum of 256 Bytes or when buffer size was set to 50 KB. Besides, the delay varied between 200 and 600 ms in cases when the Duplicate Address Detection (DAD) and wireless link delays reached up to 600 ms and 70 ms, respectively. In conclusion, the selection-based decision mechanism in vertical handoff such as VFHO, can be good for congestion control, and achieve long-term objectives such as load sharing. 2009-08 Thesis http://psasir.upm.edu.my/id/eprint/7347/ http://psasir.upm.edu.my/id/eprint/7347/1/FK_2009_43a.pdf application/pdf en public phd doctoral Universiti Putra Malaysia Faculty of Engineering English |
| institution |
Universiti Putra Malaysia |
| collection |
PSAS Institutional Repository |
| language |
English English |
| topic |
|
| spellingShingle |
Solouk, Vahid Vertical Fast Handoff Technique For Mobile IPv6 in Heterogeneous 4G Networks |
| description |
Over the recent years, mobility in wireless communications has become a big
interest of communication and network researches due to the rising demand on
and expectations of wireless Internet access. However, since none of the existing
wireless technologies can individually fulfill all the tasks arising from the
Internet users’ demands, the integration or coexistence of different
communication systems having different network characteristics is inevitable.
This integration on the other hand, requires seamless inter-system mobility
solutions. Every inter-system roaming which leads to vertical handoff requires
proper interaction of both link and IP layers, since network point of attachment
as well as the device interface are involved in handoff. Many investigations in standardization are being made to finally design and implement each of these
communication layers. This thesis details out the whole research, which is done
in two main components. As for the first component, a link layer mechanism
with the notion of a selection algorithm based on weighted mean is primarily
introduced for collecting link layer information and discovering the candidate
access router. This mechanism is then used as handoff decision phase with an
improved mobile-assisted handoff method as an extension of Fast Mobile IPv6
Handoff (FMIPv6) in vertical mode. The performance of the proposed methods
is discussed using analysis and comparison of simulation results with wellknown
methods in the field. The method has been shown to achieve
performance improvements in terms of higher preference level of selection for
various cases, and in terms of latency and packet loss, by 45% and 83%
respectively, while maintaining comparatively lower buffer sizes. As the second
component, a framework is proposed to incorporate an integration mode of
cellular and wireless networks called semi tightly-coupled. This framework is
further used to design and implement an end-to-end roaming solution as
Vertical Fast Handoff (VFHO) for the integrated network. The performance of
the proposed framework has been analyzed mathematically and through
simulations which show the robustness of VFHO in terms of signaling cost, endto-
end packet delivery cost, overall handoff latency, and packet loss based on
various system variables. Under several simulations, the number of lost packets
encountered by VFHO stayed as low as 20 packets when the arrival rate was a maximum of 50 packets per second, and did not exceed 10 packets in the case
when packet sizes was at a maximum of 256 Bytes or when buffer size was set to
50 KB. Besides, the delay varied between 200 and 600 ms in cases when the
Duplicate Address Detection (DAD) and wireless link delays reached up to 600
ms and 70 ms, respectively. In conclusion, the selection-based decision
mechanism in vertical handoff such as VFHO, can be good for congestion
control, and achieve long-term objectives such as load sharing. |
| format |
Thesis |
| qualification_name |
Doctor of Philosophy (PhD.) |
| qualification_level |
Doctorate |
| author |
Solouk, Vahid |
| author_facet |
Solouk, Vahid |
| author_sort |
Solouk, Vahid |
| title |
Vertical Fast Handoff Technique For Mobile IPv6 in Heterogeneous 4G Networks |
| title_short |
Vertical Fast Handoff Technique For Mobile IPv6 in Heterogeneous 4G Networks |
| title_full |
Vertical Fast Handoff Technique For Mobile IPv6 in Heterogeneous 4G Networks |
| title_fullStr |
Vertical Fast Handoff Technique For Mobile IPv6 in Heterogeneous 4G Networks |
| title_full_unstemmed |
Vertical Fast Handoff Technique For Mobile IPv6 in Heterogeneous 4G Networks |
| title_sort |
vertical fast handoff technique for mobile ipv6 in heterogeneous 4g networks |
| granting_institution |
Universiti Putra Malaysia |
| granting_department |
Faculty of Engineering |
| publishDate |
2009 |
| url |
http://psasir.upm.edu.my/id/eprint/7347/1/FK_2009_43a.pdf |
| _version_ |
1747810691533766656 |