Integration of Heterogeneous Wireless Access Networks

Beaubrun, Ronald

doi:10.1007/978-0-387-09777-0_1

Cited by 10 publications

(6 citation statements)

References 18 publications

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“…The main advantage is that the network uses both direct and indirect path. The gateway which is used to integrate three networks by means of EPC and it can act as a main gateway to carry traffic from the individual networks [15,16]. The scenario shows that 10 users is kept under the WLAN access point and each user is having email, FTP, voice and video applications.…”

Section: Proposed Hybrid Coupled Interworking Of Wlan-wimax-lte Lb-ipqosmentioning

confidence: 99%

QoS Improvement for the Next Generation Heterogeneous Network

Vijayalakshmy¹,

Lakshmy²,

Gopalakrishnan³

2014

IJCA

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Next Generation Wireless Networks (NGWNs) focus on convergence of different Radio Access Technologies (RATs) providing good Quality of Service (QoS) for applications such as Voice over IP (VoIP) and video streaming. A heterogeneous network is to enable the users to obtain and share necessary and timely information in the right form over integrated heterogeneous network which is scalable and evolvable. Load balancing which is a significant method to achieve the resource sharing and IPQoS algorithm in the heterogeneous network is used to improve the overall performance of the network by configuring of queuing methods. Existing interworking networks couldn't support the bandwidth demands of many multimedia applications which exceed the capacity of the interworking network. To meet the challenges, LTE is a step toward the 4th generation of radio technologies designed to increase the capacity and speed of mobile telephone networks. The LTE promises to be one of the wireless access technologies capable of supporting very high bandwidth applications. In this paper a hybrid coupled interworking of three networks (WiMAX -WLAN -LTEIPQoS -LB) using H.323 signaling protocol is proposed. Heterogeneous network model based on Fast handover Hierarchical Mobile IPV6 (FHMIPV6) protocol that integrates the WiMAX, LTE and WLAN technologies is proposed to improve QoS. The QoS parameter in terms multimedia application such as traffic sent and received, RTP, response time, jitter, packet end -to-end delay , TCP delay, Ethernet delay, packet delay variation, of proposed work were simulated and its performance are measured.

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Section: Proposed Hybrid Coupled Interworking Of Wlan-wimax-lte Lb-ipqosmentioning

confidence: 99%

QoS Improvement for the Next Generation Heterogeneous Network

Vijayalakshmy¹,

Lakshmy²,

Gopalakrishnan³

2014

IJCA

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“…Two general approaches in terms of the architectural design for integrating various access networks are possible: loose coupling and tight coupling [7,24]. In loose coupling different access networks are independent and are connected to each other through the Internet.…”

Section: The Topologymentioning

confidence: 99%

“…In a heterogeneous environment it is important to differentiate the problem of packet routing from the problem of optimal access network selection, which has already been extensively studied in the literature [1][2][3][4][5][6][7]. These studies consider the case where end-users are directly covered by several attachment points and decisions should be made to select the most appropriate attachment point for receiving service.…”

Section: Introductionmentioning

confidence: 99%

Hybrid multi-technology routing in heterogeneous vehicular networks

Shafiee

Leung

2012

J Wireless Com Network

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Recent developments of wireless communication systems have resulted in the availability of heterogeneous access networks at any geographic area. To make use of this heterogeneous environment for vehicular users to access the Internet, in this article we propose a hybrid multi-technology routing (HMTR) protocol for multihop vehicular networks. HMTR takes into account different combinations of wireless technologies in intermediate hops and is generally formed of a combination of topology-based and position-based routing schemes for packet forwarding. For a given packet, HMTR uses the position-based routing approach over highly variable links whose lifetimes are shorter than the packet expiry time. On the other hand, it employs the topology-based routing approach over more stable links that are expected to stay valid before the expiry time of the packet. Among the candidate routes, any route which does not meet the user requirements in terms of budget or quality of service metrics such as delay and bandwidth is ruled out first. Then, among the remained candidates those with adequate levels of connectivity are assessed for their appropriateness in terms of network utilizations, which are of the network's concern and connection costs, which are of users' concern. Simulation results show that HMTR enables us to achieve the best possible performance in terms of delivery ratio and delivery delay for a given budget, whereas in pure position-based or pure topology-based routing schemes sacrificing the performance or budget may be inevitable in many scenarios.

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“…For this purpose, a combination of tight and loose coupling can be used through which the cellular core network considers WLANs as part of its access network to enable signaling traffic transfer through the cellular network. Different architectures for tight and loose couplings and their pros and cons are studied in more detail in [12].…”

Section: Introductionmentioning

confidence: 99%

Optimal Distributed Vertical Handoff Strategies in Vehicular Heterogeneous Networks

Shafiee

Attar

Leung

2011

IEEE J. Select. Areas Commun.

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Abstract-This paper addresses the problem of optimal vertical handoff (VHO) in a vehicular network setting. The VHO objective can be minimizing the data transfer time or alternatively minimizing the cost of transmitting traffic. As a framework for performance evaluations, we first analyze a heterogeneous network consisting of a wide-area cellular network interworking with wireless local area networks (WLAN) with fixed interdistance between access points (APs) placed along roadsides. We further analyze a scenario with random inter-distance between WLAN APs. In both aforementioned cases, only Vehicle-toInfrastructure (V2I) capability is assumed. We show that in order to minimize the cost of transmission or alternatively transmission time, performing VHOs is an appropriate choice at lower speeds, whereas it would be better to avoid VHO and stay in the cellular network at higher speeds. We further generalize our study, to investigate the VHO strategies in a random inter-distance scenario with both V2I and Vehicle-toVehicle (V2V) communication capabilities. We demonstrate that the combination of WLAN plus cellular plus ad hoc networking outperforms any other networking strategies considered in this work in terms of transmission times and transmission costs. The presented results provide insightful guidelines for optimal VHO decision making based on the characteristics of the network as well as the user mobility profile.Index Terms-Vehicular Network, Vertical Handoff, Heterogeneous Network, V2I, V2V.

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Integration of Heterogeneous Wireless Access Networks

Cited by 10 publications

References 18 publications

QoS Improvement for the Next Generation Heterogeneous Network

QoS Improvement for the Next Generation Heterogeneous Network

Hybrid multi-technology routing in heterogeneous vehicular networks

Optimal Distributed Vertical Handoff Strategies in Vehicular Heterogeneous Networks

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