I Am 4 VHO: New Approach to Improve Seamless Vertical Handover in Heterogeneous Wireless Networks

Khattab, Omar; Alani, Omar

doi:10.5121/ijcnc.2013.5304

Cited by 9 publications

(2 citation statements)

References 13 publications

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“…Also MIH is more flexible and has better performance to provide seamless VHO compared with IMS framework. In this work, we present our Imperative Alternative MIH for Vertical Handover (I AM 4 VHO) algorithm based on MIH framework which achieves: (a) low VHO connection failure (probability of session rejection) as a result of using the optimum RATs (list of priority) proposed in [45] and (b) low signaling cost. The algorithm defines two main types of VHO: Automatically Imperative VHO (AIVHO) session and Alternative VHO (AVHO) session.…”

Section: I Am 4 Vho Algorithmmentioning

confidence: 99%

Algorithm for seamless vertical handover in heterogeneous mobile networks

Khattab

Alani

2014

2014 Science and Information Conference

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One challenge of wireless networks integration is to provide ubiquitous wireless access abilities and seamless handover for mobile communication devices between different types of technologies (3GPP and non-3GPP) such as Wireless Fidelity (Wi-Fi), Worldwide Interoperability for Microwave Access (WiMAX), Universal Mobile Telecommunications System (UMTS) and Long Term Evolution (LTE). This challenge is critical as Mobile Users (MUs) are becoming increasingly demanding for improved services regardless of the technological complexities associated with them. To fulfill these requirements for seamless Vertical Handover (VHO) two main interworking frameworks were proposed by IEEE Group and 3GPP for integration between the aforementioned technologies; namely, Media Independent Handover IEEE 802.21 (MIH) and IP Multimedia Subsystem (IMS), where each of them requires mobility management protocol to complement its work such as Mobile IP (MIP) and Session Initiation Protocol (SIP), respectively. In this paper, we overview these frameworks and show their components, benefits and drawbacks. Then we present our Imperative Alternative MIH for Vertical Handover (I AM 4 VHO) algorithm based on MIH framework and using fuzzy logic to provide low connection failure (probability of session rejection) and low signaling cost for enhancing VHO in heterogeneous wireless networks environment. Simulation based performance evaluation shows that the proposed algorithm reduces the probability of VHO connection failure by up to 75%.

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Section: I Am 4 Vho Algorithmmentioning

confidence: 99%

Algorithm for seamless vertical handover in heterogeneous mobile networks

Khattab

Alani

2014

2014 Science and Information Conference

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“…Also literature by Khattab [ 17 ] presented a survey on MIH(Media Independent Handover and ANDSF(Access Network Discovery and Selection Function) schemes for vertical handover. ANDSF protocol proposed in literature [ 18 ] works with RAT information to perform handover decision. This scheme is of medium complexity and new logical entities were added to provide authentication and link connection during handover.…”

Section: Related Workmentioning

confidence: 99%

Knapsack - TOPSIS Technique for Vertical Handover in Heterogeneous Wireless Network

Malathy

Muthuswamy

2015

PLoS ONE

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In a heterogeneous wireless network, handover techniques are designed to facilitate anywhere/anytime service continuity for mobile users. Consistent best-possible access to a network with widely varying network characteristics requires seamless mobility management techniques. Hence, the vertical handover process imposes important technical challenges. Handover decisions are triggered for continuous connectivity of mobile terminals. However, bad network selection and overload conditions in the chosen network can cause fallout in the form of handover failure. In order to maintain the required Quality of Service during the handover process, decision algorithms should incorporate intelligent techniques. In this paper, a new and efficient vertical handover mechanism is implemented using a dynamic programming method from the operation research discipline. This dynamic programming approach, which is integrated with the Technique to Order Preference by Similarity to Ideal Solution (TOPSIS) method, provides the mobile user with the best handover decisions. Moreover, in this proposed handover algorithm a deterministic approach which divides the network into zones is incorporated into the network server in order to derive an optimal solution. The study revealed that this method is found to achieve better performance and QoS support to users and greatly reduce the handover failures when compared to the traditional TOPSIS method. The decision arrived at the zone gateway using this operational research analytical method (known as the dynamic programming knapsack approach together with Technique to Order Preference by Similarity to Ideal Solution) yields remarkably better results in terms of the network performance measures such as throughput and delay.

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