Multi-Criteria Vertical Handover Decision Algorithm in Heterogeneous Wireless Network (original) (raw)
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Vertical Handover Decision Algorithm Using Multicriteria Metrics in Heterogeneous Wireless Network
Journal of Computer Networks and Communications, 2015
Heterogeneous network concept was introduced to satisfy the demands of network’s traffic capacity and data rate. It consists of multiplatform networks with various radio access technologies. Conventionally, a mobile user may roam and accomplish the vertical handover using single criteria, such as received signal strength (RSS). Single criteria vertical handover decision, however, may cause inefficient handoff, unbalanced network load, and service interruption. This paper proposed an improved vertical handover decision using multicriteria metrics in the environment of heterogeneous network consisting of three network interfaces: (i) wireless local area network (WLAN), (ii) wideband code division multiple access (WCDMA), and (iii) worldwide interoperability for microwave access (WiMAX). In the vertical handover decision, four metrics are considered: (i) RSS, (ii) mobile speed, (iii) traffic class, and (iv) network occupancy. There are three types of the vertical handover decision algo...
Enhanced Handover Decision Algorithm in Heterogeneous Wireless Network
Transferring a huge amount of data between different network locations over the network links depends on the network's traffic capacity and data rate. Traditionally, a mobile device may be moved to achieve the operations of vertical handover, considering only one criterion, that is the Received Signal Strength (RSS). The use of a single criterion may cause service interruption, an unbalanced network load and an inefficient vertical handover. In this paper, we propose an enhanced vertical handover decision algorithm based on multiple criteria in the heterogeneous wireless network. The algorithm consists of three technology interfaces: Long-Term Evolution (LTE), Worldwide interoperability for Microwave Access (WiMAX) and Wireless Local Area Network (WLAN). It also employs three types of vertical handover decision algorithms: equal priority, mobile priority and network priority. The simulation results illustrate that the three types of decision algorithms outperform the traditional network decision algorithm in terms of handover number probability and the handover failure probability. In addition, it is noticed that the network priority handover decision algorithm produces better results compared to the equal priority and the mobile priority handover decision algorithm. Finally, the simulation results are validated by the analytical model.
Increasing consumer demand for access to services anywhere and anytime is driving a hastened technological progression towards the integration of a variety of wireless access technologies. Therefore one of the chief interest points of Next Generation Wireless Networks (NGWNs), refers to the capability to support wireless network access equipments to guarantee a high rate of services between dissimilar wireless networks. To answer these problems it is essential to have decision algorithms to decide for every user of mobile terminal, which is the most excellent network at some point, for a service or a precise application that the user needs. Therefore to make these things, many algorithms use the vertical handoff technique. A series of algorithms based on vertical handoff technique with a categorization of the different existing vertical handoff decision strategies, which tries to resolve these issues of wireless network selection at a specified time for a specific application of an user has been discussed in this paper. Also few parameters that are to be considered during vertical handover have been discussed briefly.
Vertical handover decision algorithm in heterogeneous wireless networks
International Journal of Internet Protocol Technology, 2017
With the recent progress in the area of cellular communication the issue of inter cells handover without dropping an ongoing connection with the base station has arisen. In this paper, the focus is on the performance of vertical handover. Various proposed interconnection architectures for vertical handover in heterogeneous networks were studied. Two different algorithms to make the decision on when and to which network perform a handover were considered. In the first of them the decision is based on the received signal strength (RSS). In the second one a fuzzy logic system that uses RSS, bandwidth, battery power and packet loss as the input parameters is proposed. The simulation results show that the algorithm based on fuzzy logic leads to a reduction of the number of handovers and a minimization of the power consumption as compared to the first algorithm used here and the existing algorithms.
Design an Algorithm for Vertical Handover Strategies in Heterogenous Wireless Network
2018
A heterogenous wireless network consists of different wireless access standards. To transfer data seamlessly vertical handoff (VHO) plays a major role. Seamless continuity is the main goal in 4G wireless networks. When a mobile terminal is in overlapping area, for service continuity handoff mechanism is mainly used while moving in heterogenous wireless networks. Vertical Handoff decision (VHO) is based on received signal strength (RSS) signals. While taking VHO decision, user mobility is an important factor. VHO is required only at lower speeds and higher speed user velocity may cause unnecessary handovers that can reduce system capacity and Qos level. UE velocity makes the HO decision, we can reduce the transmission cost and transmission time. Wireless access standards: Wi-Fi, Wimax, LTE. This algorithm is simulated in NS2 and its performance is evaluated in terms of user velocity and handover numbers. This approach leads to improvements in the end user experience. IndexTerms–Heter...
IET Communications, 2012
Fourth-generation networks are expected to integrate heterogeneous wireless technologies. To ensure seamless mobility across disparate wireless technologies, efficient handoff schemes are required to enhance quality of service (QoS) and offer reliable ubiquitous computing environment. This study reviews classical and existing fuzzy approaches adopted for vertical handoff to ensure seamless mobility across overlaid heterogeneous networks. A neuro-fuzzy multi-parameter-based vertical handoff decision algorithm (VHDA) is proposed. The proposed VHDA considers six parameters and applies rulebased system for vertical handoff decision. The number of vertical handoffs measured in a simulated environment shows that average number of vertical handoffs for the proposed VHDA reduces by 13.3 and 29.8% for the existing fuzzy technique and the classical technique, respectively. Further, reduction in number of unnecessary vertical handoffs in the proposed algorithm shows reduction in ping-pong effect by 15.9%, improvement in end-point service availability (ESA) and throughput by 16.57 and 5.97%, with respect to existing fuzzy technique leading towards improved QoS. Finally, the results of performance assessment, carried out using handoff quality indicator (used to quantify QoS) which is dependent upon ping-pong effect, ESA and throughput, show that the proposed VHDA offers better QoS than existing vertical handoff techniques.
Vertical Handover Decision Algorithms in Multi-Wireless Network Systems
International Journal of Engineering Research and Technology., 2019
The premise of having several network systems consists of different access technologies. Network correspondence happens when two wireless schemes exchange information over the network. A moving cell-phone device could achieve vertical handover operation when receiving signal strength (RSS) from network. Using one of wireless services may interrupt with other service and cause unbalanced network load, or it may cause incompetent vertical handover. This research improves vertical handover decision algorithm for multiple wireless network service. It is preceded with comparing three wireless communication interfaces, which are Wireless Local Area Network (WLAN), Worldwide Interoperability for Microwave Access (WiMAX), and Long-Term Evolution (LTE). The study base on three types of priority algorithms to make a vertical handover decision (VHD), they are: equal, mobile, and network priority. VHD algorithms are fundamental segments to the engineering of the anticipated Fourth Generation (4G) heterogeneous wireless networks. These algorithms should be intended to give the required Quality of Service (QoS) to a wide scope of uses while permitting consistent wandering through a host of access network fees. The results show that the proposed algorithm for handover decision calculation beats the customary network decision calculation as far as handover number likelihood and the handover disappointment likelihood. What's more, it is seen that the network need handover decision calculation creates better outcomes contrasted with equivalent need and mobile need handover decision calculation. Lastly, the simulation outcomes are approved using explanatory model.
Comparison of Vertical Handover Decision-Based Techniques in Heterogeneous Networks
Int. J. Communications, Network and System Sciences, 2018
Industry leaders are currently setting out standards for 5G networks projected for 2020 or even sooner. Future generation networks will be heterogeneous in nature as no single network type will be capable of optimally meeting all the rapid changes in customer demands. With the advent of multi-homed devices and heterogeneous network (HetNet) solution, great concerns arise in the processes involved for successful handover. Active calls that get dropped or cases of poor quality of service experienced by mobile users can be attributed to the phenomenon of delayed handover (HO) or an outright case of an unsuccessful handover procedure. This work compares multiple criteria handover basis to its traditional single relative signal strength (RSS) base counterpart. It analyses the performance of a fuzzy-based VHO algorithm scheme in a Wi-Fi, WiMAX, UMTS and LTE integrated network using OMNeT++ event simulator. The loose coupling network architecture is adopted and simulation results analysed for the two major categories of handover; the multiple and single criteria. Results obtained show a better overall through-put, better call dropped rate and shorter handover time for the multiple criteria based decision method as compared to the single criteria based technique. This work also highlights current research trends, challenges of seamless handover and initiatives for Next Generation HetNet.
2015
Now a day's varying wireless technologies are driving today's wireless networks to become heterogeneous, i.e., the network comprised of two or more different access network technologies. Heterogeneous networks have created many challenges such as mobility management, handoff, resource management, location management, providing QoS, security and pricing. Switching between heterogeneous networks requires seamless vertical handoff. Therefore to ensure seamless roam across heterogeneous wireless technologies, efficient vertical handoff algorithms (VHA) are required to enhance QoS and offer reliable pervasive computing environment. The selection of parameters plays an important role in the decision of vertical handoff. The parameters like bandwidth signal strength, velocity, power consumption, throughput, cost, user preferences and network load are considered during vertical handoff in all the available works .This study reviews some recently done works on vertical handover imple...
Improved Handover Decision Algorithm Using Multiple Criteria
Procedia Computer Science, 2018
The transfer of massive data between varied network positions links of network relies on data rate, as well as the traffic capacity of the network. Conventionally, a device that is mobile can be used to attain vertical handover functional by weighing in only an aspect, which refers to Received Signal Strength (RSS). The application of this particular criterion could lead to interruption in services, ineffective vertical handover , and a network load that is not balanced. Hence, this paper proposes an improvised vertical handover decision algorithm by integrating multicriteria within a wireless network that is heterogeneous. The proposed algorithm comprised of three vertical handover decision algorithms, namely: mobile weight, network weight, and equal weight. Additionally, three technology interfaces were embedded in this study including Worldwide interoperability for Microwave Access (WiMAX), Wireless Local Area Network (WLAN), and Long-Term Evolution (LTE). As a result, the simulation outcomes demonstrated that the handover decision algorithm for network weight generated exceptional outputs, in comparison to mobile and equal weights, as well as the conventional network decision algorithm from the aspects of handover failure and handover number probabilities.