5 research outputs found
Performance evaluation of multi-interfaced fast handoff scheme for PNEMO Environment
Mobility management is classified into two parts such as location management and handoff management. The earlier one concentrates on location update whereas the later one manages continuous Internet connectivity while the Mobile Router (MR) changes its single point of attachment to the network. Therefore, frequent movement of the MR is one of the significant characteristics in Network Mobility (NEMO) environment. Because, in accordance with the standard Network Mobility Basic Support Protocol (NEMO BSP), the MR utilizes single Interface to attach to the access link. MR requires changing its Care of Address (CoA) when it moves among different wireless access networks. As a result, it can directly influence the performance of the mobility management protocols during inter technology handoff of multi-interfaced MR. This paper proposed a multi-interfaced fast handoff scheme in Proxy NEMO (PNEMO) environment. After that, it represents a comparative analysis between the proposed multiinterfaced scheme, NEMO BSP and the PNEMO scheme respectively. The performance disparities of these schemes are estimated and analyzed via both numerical and simulation approaches. The simulation is performed through NS-3 network simulator. The performance metrics estimated for evaluation are mainly handoff delay and packet loss. It has been perceived that, the proposed scheme performs better compared to the PNEMO scheme and NEMO BSP
MROM scheme to improve handoff performance in mobile networks
Mobile Router (MR) mobility supported by Network Mobility
Basic Support Protocol (NEMO BS) is a Mobile IPv6 (MIPv6) extension that
supports Host Mobility. Proposed Multihoming and Route Optimization for
MANEMO (MROM) scheme is designed to provide Route Optimization (RO)
and Multihomed in NEMO architectures. This paper proposes two novel
schemes; MANEMO routing scheme and Multihoming-based scheme. These
are to provide support for next generation networks. The proposed MROM
scheme differs from other schemes for NEMO environment because it considers
the requirements of more application flows parameters as packet lost delivery,
handoff delay as well as throughput). Another difference is that not only the
network infrastructure can begin the functionality of flow routing, but also an
Edge Mobile Router (EMR) can do this flow for routing. Moreover, it utilizes
the state of the art and presently active access network to perform the separation
of each flow in mobile network. Thus, proposed MROM exhibits multihoming
features and improves handoff performance by initiating flow-based fast
registration process in NEMO environment. A handoff method is proposed with
enhanced functionalities of the Local Mobility Anchors (LMA), Mobile Routers
(MRs) and signaling messages with a view to achieve continuous connectivity
through handoff in NEMO. Both analytical and simulation approaches are used.
Analytical evaluation is carried out to analyze packet delivery lost and handoff
delay of our proposed scheme. It was also shown that cost of signaling
messages and packet delivery are contributing to total handoff cost. At the
simulation part, network simulator 3 (NS 3) has been used as the tool to get
performance metrics that have been considered like packet delivery ratio,
handoff delay, and packet loss. Our proposed scheme (MROM) has been
benchmarking to the standard NEMO BS Protocol and P-NEMO. In this paper,
we discuss proposed MROM for next generation networks, providing detailed
analysis with a numerical model, proposed MROM, by maximizing the handoff
performance, has been justified to have better mobility support than the
ordinary NEMO BS Protocol and PNEMO.
Keywords—MROM, MANEMO, RO, Multihomed, Handoff
Collaborative streaming of on demand videos for mobile devices
The 3G and LTE technologies made video on-demand a popular entertainment for users on the go. However, bandwidth insufficiency is an obstacle in providing high quality and smooth video playout in cellular networks. The objective of the proposed PhD research is to provide a user with high quality video streaming with minimal stalling time by aggregating bandwidth from ubiquitous nearby devices that may be using different radio networks
Secure and efficient routing in highly dynamic WLAN mesh networks
Recent advances in embedded systems, energy storage, and communication interfaces,
accompanied by the falling prices of WLAN routers and a considerable
increase in the throughput of a WLAN (IEEE 802.11), have facilitated the proliferation
of WLAN Mesh Network (WMN) applications. In addition to their
current deployments in less dynamic community networks, WMNs have become
a key solution in various highly dynamic scenarios. For instance, WMNs are intended
to interconnect self-organized, cooperative, and small Unmanned Aerial
Vehicles (UAVs) in a wide range of applications, such as emergency response, environmental
monitoring, and ad-hoc network provisioning. Nevertheless, WMNs
still face major security challenges as they are prone to routing attacks. Consequently,
the network can be sabotaged and, in the case of UAV-WMN-supported
missions, the attacker might manipulate payload data or even hijack UAVs.
Contemporary security standards, such as the IEEE 802.11i and the security
mechanisms of the IEEE 802.11s mesh standard, are vulnerable to routing attacks,
as experimentally shown in this research. Therefore, a secure routing
protocol is indispensable for making feasible the deployment of WMNs in critical
scenarios, such as UAV-WMN-assisted applications. As far as the author of
this thesis knows, none of the existing research approaches for secure routing in
WMNs have gained acceptance in practice due to their high overhead or strong
assumptions.
In this research, a new approach, which is called Position-Aware, Secure, and
Efficient mesh Routing (PASER), is proposed. This new proposal defeats more
attacks than the IEEE 802.11s/i security mechanisms and the well-known, secure
routing protocol Authenticated Routing for Ad-hoc Networks (ARAN), without
making restrictive assumptions. It is shown that PASER achieves —in realistic
UAV-WMN scenarios— similar performance results as the well-established, nonsecure
routing protocols Hybrid Wireless Mesh Protocol (HWMP) combined with
the IEEE 802.11s security mechanisms. Two representative scenarios are considered:
(1) on-demand ubiquitous network access and (2) efficient exploration of
sizable areas in disaster relief. The performance evaluation results are produced
using an experimentally validated simulation model of WMNs, realistic mobility
patterns of UAVs, and an experimentally derived channel model for the air-to-air
WMN link between UAVs. The findings of this evaluation are justified by the
route discovery delay and the message overhead of the considered solutions