Decentralized Approach for Achieving Seamlessness

Decentralized Approach for Achieving SeamlessnessCONCLUSION AND FUTURE WORKThesis OutcomeThe major(ip) outcome of this research effort is to analyse the feasibility and benefits of achieving seamlessness with the proposed decentralized orgasm augmenting the customary centralized appendageion for intricate networks. In lieu of this, the outcomes achieved includeA crossing Approach (Linux Kernel Module and SCTP) to lessening the latency during Vertical Handoff process and IP mobility to achieve seamless perseveration.Location Aw arness in Hybrid Approach to reduce the triggering of gratuitous handoffs during steep handoff that result in exploit degradation.Contri exclusivelyions of the Present WorkIn this thesis, several aspects and improvementes for seamless continuity are discussed. The major contributions of the work carried out in this thesis areDifferent approaches to achieve seamless continuity in heterogeneous networking environment.A brief review on the open come t o the fores and challenges related to seamless continuity. purport and development of daemon found decentralized approach for intranet environment.Design and development of an efficient and fast method known as bone marrow based decentralized approach for improving the latency during handoffs.Development of Stream Control Transmission Protocol (SCTP) approach for wooing dynamic address reconfiguration in heterogeneous environment.Design and development of a novel hybrid method using the conspiracy of SCTP and kernel module.Development of a location aware method to incorporate into the hybrid approach for heterogeneous networks.Solution OverviewThe proposed etymon is a hybrid approach to achieve seamless session continuity in heterogeneous networks. This approach is completely decentralized complementing the centralized approach which is completely based on host agents. It can be applied to both intra and Internet environment without any changes to the network layer. To prove t his approach for seamlessness, testing was done on three network interfaces Ethernet (eth), wireless fidelity (wlan), WCDMA (wcdma).For IntranetA vertical handoff daemon was actual to achieve seamlessness over heterogeneous networks. This daemon application runs as a background process at the drug user space and it also takes care of the handoff process between various radio interfaces. Firstly, this proposed daemon incessantly polls for the registered interfaces and then checks the status (live or dead) of these devices. Later, it also updates the status to the network layer of the protocol caboodle to keep the service continuing between the brisk device and the server. The designed architecture is well desirable for all the IP based multimedia applications but running only in intranet environment. IP mobility is an issue which has to be still addressed which cannot be solved in this approach.For InternetTo achieve seamless continuity over heterogeneous networks, this propo sed solution is a combination of Stream Control Transmission Protocol (SCTP) and Linux kernel module. This kernel module gets registered with the Linux kernel and updates the status of various interfaces by signalling the SCTP application running at the user level. This SCTP application will then accomplish the handoff process between various network interfaces.The reason loafer this approach is SCTP has an advantage of IP address reconfiguration which solves the IP mobility issue and Kernel module has an advantage of latency. This accomplishes the handoff process in a faster and elegant fashion. But this will not solve the problem of unnecessary triggering of handoffs. In this regard the following handoff decision process was integrated into hybrid approach to improve process while achieving seamlessness.Location based Handoff DecisionThis proposed algorithmic rule is completely based on location based information. This is a research effort to study the feasibility of location b ased solution which consists of combining the conventional handoff decision with a location based evaluation apparatus. This mechanism relies on positioning method for obtaining expeditious user position fixes. Once the users location, hie and direction are calculated, the evaluation mechanism will predict the users path. It will then decide whether the user will stay in the same network coverage area for necessary duration to result in performance improvement. If not, this proposed evaluation method will notify the mobile device to trigger a handoff. The knowledge on users location, speed and direction is necessary to prevent inefficient and unnecessary handoffs.ConclusionIn this research effort, a seamless vertical handoff system across heterogeneous networks is presented. It is implemented in true Linux operating system. In the proposed system, the handoff latency is much shorter than other current systems focusing on the issue of vertical handoff. Different from other verti cal handoff systems, handoff agents or servers are not required in this system. Only with the mobile host itself, the vertical handoff can be realized. Moreover, the overhead during handoff is also quite low. The system is evaluated through a series of experiments. The experimental results demonstrated the handoff is handled in a fast and elegant manner.The proposed system is tested in the real-world analyses. The experiments were conducted under different environments and evaluated with various multimedia applications. This work is not only for home network solution but it is extended to an Internet solution. Moreover, prior to triggering handoff, the algorithms ability to predict user direction, speed and visit to WLAN coverage area allowed it to provide an observable benefit both on users perspective and also on networks perspective. This location based evaluation of the algorithm helped to not only prevent the occurrence of unnecessary handoffs which would result in performance degradation but also reduce wastage of resources.The novel hybrid decentralized approach based on location cognizance presented in this work handled the issues of latency, dynamic address reconfiguration and unnecessary triggering of handoffs for seamless continuity in heterogeneous networks. upcoming WorkKeeping in view the wide proliferation of heterogeneous networks and high level of interworking required for undermentioned generation mobile users, the scope of the future work can be more focussed on pursuing open challenges much(prenominal) as battery former consumption, Quality of Service (QoS) and security for efficient ubiquitous experience and seamless continuity.Battery power consumption of the mobile client is a meaningful criterion for handoff. Whenever the battery power drops to particular threshold, the mobile client should immediately shift to lower power demand network interface.As the demand for multimedia applications increases there is a need to guarantee QoS such as high available bandwidth, Bit Error Rate (BER), network load balancing, Signal to psychological disorder ratio (SNR) and so on.Security is another important criterion which needs to be addressed. Hence, when handoff data is change between devices it is always preferable to have network with high level of encryption.In this research effort, slightly work was done on best Access Point selection algorithm. With the enormous increase of WLAN APs everywhere, there is a need to look at new approaches to select the best AP among fourfold APs for achieving horizontal handoffs.