1,182 research outputs found
Trusted Network Selection using SAW and TOPSIS Algorithms for Heterogeneous Wireless Networks
Seamless continuity is the main goal in fourth generation Wireless networks
(FGWNs), to achieve this "HANDOVER" technique is used, when a mobile
terminal(MT) is in overlapping area for service continuity, Handover mechanism
are mainly used. In Heterogeneous wireless networks main challenge is continual
connection among the different networks like WiFi, WiMax, WLAN, WPAN etc. In
this paper, Vertical handover decision schemes are compared and Multi Attribute
Decision Making (MADM) is used to choose the best network from the available
Visitor networks (VTs) for the continuous connection by the mobile terminal. In
our work we mainly concentrated to the handover decision phase and to reduce
the processing delay in the period of handover. MADM algorithms SAW and TOPSIS
where compared to reduce the processing delay by using NS2 to evaluate the
parameters for processing delay.Comment: arXiv admin note: substantial text overlap with arXiv:1106.240
Vertical Handover decision schemes using SAW and WPM for Network selection in Heterogeneous Wireless Networks
Seamless continuity is the main goal and challenge in fourth generation
Wireless networks (FGWNs), to achieve seamless connectivity "HANDOVER"
technique is used,Handover mechanism are mainly used when a mobile terminal(MT)
is in overlapping area for service continuity. In Heterogeneous wireless
networks main challenge is continual connection among the different networks
like WiFi, WiMax, WLAN, WPAN etc. In this paper, Vertical handover decision
schemes are compared, Simple Additive Weighting method (SAW) and Weighted
product model (WPM) are used to choose the best network from the available
Visitor networks(VTs) for the continuous connection by the mobile terminal. In
our work we mainly concentrated to the handover decision phase and to reduce
the processing delay in the period of handover. In this paper both SAW and WPM
methods are compared with the Qos parameters of the mobile terminal (MT) to
connect with the best network. Keywords: Handover, Vertical handover decision
schemes, Simple additive weighting, Weight product method.Comment: arXiv admin note: substantial text overlap with arXiv:1108.014
Regressive Prediction Approach to Vertical Handover in Fourth Generation Wireless Networks
The over increasing demand for deployment of wireless access networks has made wireless mobile devices to face so many challenges in choosing the best suitable network from a set of available access networks. Some of the weighty issues in 4G wireless networks are fastness and seamlessness in handover process. This paper therefore, proposes a handover technique based on movement prediction in wireless mobile (WiMAX and LTE-A) environment. The technique enables the system to predict signal quality between the UE and Radio Base Stations (RBS)/Access Points (APs) in two different networks. Prediction is achieved by employing the Markov Decision Process Model (MDPM) where the movement of the UE is dynamically estimated and averaged to keep track of the signal strength of mobile users. With the help of the prediction, layer-3 handover activities are able to occur prior to layer-2 handover, and therefore, total handover latency can be reduced. The performances of various handover approaches influenced by different metrics (mobility velocities) were evaluated. The results presented demonstrate good accuracy the proposed method was able to achieve in predicting the next signal level by reducing the total handover latency
Energy Efficient Network Selection in Heterogeneous Network using TOPSIS
Due to integration of heterogeneous wireless technology demand of seamless communication is increases. Various approaches have been proposed for network selection in vertical handoff. Here we propose a new energy efficient network selection algorithm by considering three networks (CDMA, WIMAX &WLAN) for network selection .In this work, based on the power consumption, traffic class and current battery level of each network interface card , the mobile terminal lifetime is to be calculated. As the lifetime of mobile terminal decreases, we reduce the number of attributes and networks by eliminating the particular network form network list. AHP (Analytic hierarchical process) and TOPSIS (Technique for order of Preference by similarity to the Ideal Solution) are used for network selection
MIPv6 Experimental Evaluation using Overlay Networks
The commercial deployment of Mobile IPv6 has been hastened by the concepts of Integrated
Wireless Networks and Overlay Networks, which are present in the notion of the
forthcoming generation of wireless communications. Individual wireless access networks
show limitations that can be overcome through the integration of different technologies
into a single unified platform (i.e., 4G systems). This paper summarises practical experiments
performed to evaluate the impact of inter-networking (i.e. vertical handovers) on
the Network and Transport layers. Based on our observations, we propose and evaluate a
number of inter-technology handover optimisation techniques, e.g., Router Advertisements
frequency values, Binding Update simulcasting, Router Advertisement caching, and Soft
Handovers. The paper concludes with the description of a policy-based mobility support
middleware (PROTON) that hides 4G networking complexities from mobile users, provides
informed handover-related decisions, and enables the application of different vertical
handover methods and optimisations according to context.Publicad
An Extensive Proposal for Vertical Handoff Technique in WLAN
Vertical handoff is the one of the most powerful hidden weapon of the wireless network scenario. As the whole world of digital electronics is moving towards internet of things as result of this vertical handoff becomes a much needed seamless connectivity tool to enhance the paradigm. Now a days many of the digital electronic devices are been inventing to boost the smaller networks like in office, universities and companies. So an inverse arise of need for vertical handoff in the WLAN is on much priority like never before. Many of the systems are existed to provide vertical handoff without degrading or interrupting the data access facility in WLAN. In most of the vertical handoff mechanism the load is put on the mobile nodes to look over the data flow mechanism in the established WLAN. This may add some contribution to increase the delay in the delivery of the data in the established network. So as an efficient answer to this, this paper put forwards an idea of vertical handoff mechanism using the pool manger in the network and put the burden on the mangers to take care of the handoff process, so that the data delivery rate can be increased. This process is designed based on the tile (i.e. time) in the said pool (pool tile vertical handoff – PTVHO) which is catalyzed by fuzzy logic to measure the handoff parameters efficiently
Seamless Infrastructure independent Multi Homed NEMO Handoff Using Effective and Timely IEEE 802.21 MIH triggers
Handoff performance of NEMO BS protocol with existent improvement proposals
is still not sufficient for real time and QoS-sensitive applications and
further optimizations are needed. When dealing with single homed NEMO, handoff
latency and packet loss become irreducible all optimizations included, so that
it is impossible to meet requirements of the above applications. Then, How to
combine the different Fast handoff approaches remains an open research issue
and needs more investigation. In this paper, we propose a new Infrastructure
independent handoff approach combining multihoming and intelligent
Make-Before-Break Handoff. Based on required Handoff time estimation, L2 and L3
handoffs are initiated using effective and timely MIH triggers, reducing so the
anticipation time and increasing the probability of prediction. We extend MIH
services to provide tunnel establishment and switching before link break. Thus,
the handoff is performed in background with no latency and no packet loss while
pingpong scenario is almost avoided. In addition, our proposal saves cost and
power consumption by optimizing the time of simultaneous use of multiple
interfaces. We provide also NS2 simulation experiments identifying suitable
parameter values used for estimation and validating the proposed mode
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