scholarly journals New Network Selection Algorithm Based on Cosine Similarity Distance and PSO in Heterogeneous Wireless Networks

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Said Radouche ◽  
Cherkaoui Leghris
Keyword(s):  
Communication Networks ◽  
Heterogeneous Wireless Networks ◽  
Access Network ◽  
Vertical Handover ◽  
Cosine Similarity ◽  
Network Selection ◽  
Heterogeneous Environments ◽  
Selection Algorithm ◽  
Similarity Distance ◽  
The Ideal

Future wireless communication networks will be composed of different technologies with complementary characteristics. Thus, vertical handover (VHO) must support seamless mobility in such heterogeneous environments. The network selection is an important phase in the VHO process and it can be formulated as a multiattribute decision-making problem. So, the mobile terminal equipped with multiple interfaces will be able to choose the most suitable network. This work proposes an access network selection algorithm, based on cosine similarity distance, subjective weights using Fuzzy ANP, and objective weights using particle swarm optimization. The comprehensive weights are based on the cosine similarity distance between the networks and the ideal network. Finally, the candidate network with the minimum cosine distance to the ideal network will be selected in the VHO network selection stage. The performance analysis shows that our proposed method, based on cosine similarity distance and combination weights, reduces the ranking abnormality and number of handoffs in comparison with other MADM methods in the literature.

Vertical Handover Decision Schemes in Fourth Generation Heterogeneous Cellular Networks

2018 ◽  
Vol 14 (1) ◽  
pp. 1-26
Author(s):  
Adnan Mahmood ◽  
Shadi M. S. Hilles ◽  
Hushairi Zen
Keyword(s):  
Multiple Access ◽  
Heterogeneous Wireless Networks ◽  
Access Network ◽  
Decision Criterion ◽  
Vertical Handover ◽  
Fourth Generation ◽  
Handover Decision ◽  
Advantages And Disadvantages ◽  
Network Technologies

Vertical Handover Decision (VHD) algorithms are indispensable components of forthcoming 4G heterogeneous wireless networks architecture – so as to provide requisite Quality of Service to an assortment of applications anywhere at any time, while allowing seamless roaming in highly dynamic scenarios (i.e. multitude of access network technologies that vary in bandwidth, latency, monetary cost, etc.) using Mobile Terminals (MTs) enabled with multiple access interfaces. In this article, a critical review of the existing VHD algorithms has been carried out as an effort to update the previous studies. To offer a methodical contrast, recently published VHD algorithms have been classified into four major classes depending on the key handover decision criterion used, i.e. RSS based algorithms, bandwidth based algorithms, cost function based algorithms, and the combination algorithms. Moreover, operational fundamentals, advantages, and disadvantages of exemplary VHD algorithms for each class have been presented to assess the tradeoffs between their intricacy of implementation and the efficacy.

A Network Selection Algorithm with Parallel Transmission Based on MADM

2014 ◽  
Vol 556-562 ◽  
pp. 4606-4611 ◽  
Author(s):  
Li Na Zhang ◽  
Qi Zhu
Keyword(s):  
Wireless Networks ◽  
Quality Of Service ◽  
Heterogeneous Wireless Networks ◽  
Network Selection ◽  
Selection Algorithm ◽  
Decision Matrix ◽  
Parallel Transmission ◽  
User Throughput ◽  
Selection Algorithms

At present, most of researches on network selection algorithms are focused on single access. To support seamless mobility and provide better quality of service in heterogeneous wireless networks, this paper proposes a network selection algorithm with parallel transmission based on MADM. In the algorithm, we firstly determine all available wireless networks and consider every subset of these networks as a network scheme. Then we obtain aggregation attributes of every scheme and determine the alternative network schemes. Finally, we build the decision matrix of multiple attributes and determine the optimal scheme by using GRA. Simulation results show that the proposed algorithm can obviously improve user quality of service, improve user throughput, reduce power consumption and price cost per bit.

scholarly journals A novel vertical handover algorithm based on Adap-tive Neuro-Fuzzy Inference System (ANFIS)

2018 ◽  
Vol 7 (1) ◽  
pp. 74 ◽  
Author(s):  
Eman Zakaria ◽  
Amr A.Awamry ◽  
Abdelkerim Taman ◽  
Abdelhalim Zekry
Keyword(s):  
Fuzzy Inference ◽  
Heterogeneous Wireless Networks ◽  
Access Network ◽  
Signal Strength ◽  
Vertical Handover ◽  
Inference System ◽  
Internet Connection ◽  
Neuro Fuzzy ◽  
Always Best Connected

Nowadays, there is an increased demand on an Internet connection anywhere at any time. Therefore, one has to exploit all available heterogeneous wireless networks where the target is achieving the Always Best Connected (ABC) among the different networks like UMTS, WiMAX, and WLAN. So, vertical handover techniques are used to ensure the best connectivity anywhere at any time. In this paper, novel ANFIS-based vertical handover is presented and compared with TOPSIS algorithm and other algorithms as a representative of Multi-criteria decision making (MCDM) algorithm's family. The simulation results show that the proposed handover technique provided better performance in terms of minimizing the time delay and improving the quality of service (QOS). This is because ANFIS requires iterations only in training phase otherwise, it has a much faster response. Our simulations considered the effect of many practical parameters on handover, such as subscriber speed, jitter, initial delay, bandwidth and received signal strength (RSS).According to these parameters, output values produced, which is utilized to choose the best candidate access network.

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