QoS of different integration techniques in 802.11WLAN
01 Dec 2012-pp 697-700
TL;DR: This paper deals with a QoS in 802.11 WLAN (Wireless Local Area Network) and a result is obtained which will solve the issues and is feasible for the usage of all users.
Abstract: This paper deals with a QoS in 802.11 WLAN (Wireless Local Area Network). WLAN networks provide highest speed of data rate at low cost. However, mobility is not present in WLAN or its services are available in a small geographical region. Universal Mobile Telecommunication System (UMTS) is deployable for large areas but it cannot provide sufficient data rate as compared to WLAN, however, cost is also high. To remove these drawbacks the integration of WLAN and UMTS can be a better solution for present needs. The integration of these two technologies provide: better quality of service, load balancing, large geographical area with high data rate at low cost to wireless clients. The data type used is Multimedia data which is hence used to meet the current business needs as well as is required for the collaborative growth of the networking arena. The integration techniques of WLAN and UMTS are based on coupling: open coupling, loose coupling. There is still an uncertainty which remains about the functionality and performance of the integrated architecture. Different techniques are hence been compared in this paper such a result is obtained which will solve our issues and is feasible for the usage of all users.
References
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TL;DR: This article focuses on resource management and call admission control for QoS support in cellular/WLAN interworking, and a DiffServ interworking architecture with loose coupling is presented.
Abstract: To provide mobile users with seamless Internet access anywhere and anytime/ there is a strong demand for interworking mechanisms between cellular networks and wireless local area networks in the next-generation all-IP wireless networks. In this article we focus on resource management and call admission control for QoS support in cellular/WLAN interworking. In specific, a DiffServ interworking architecture with loose coupling is presented. Resource allocation in the interworking environment is investigated/ taking into account the network characteristics, vertical handoff, user mobility, and service types. An effective call admission control strategy with service differentiation is proposed for QoS provisioning and efficient resource utilization. Numerical results demonstrate the effectiveness of the proposed call admission control scheme.
153 citations
"QoS of different integration techni..." refers methods in this paper
...The proposed integration schema is made to handle multimedia data and the performance of the integrated schema is measured and analysing its effects on the QOS provisioning [2] [4] [6]....
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TL;DR: A generic application model for an ABC capability in the interworked UMTS/WLAN architecture is formulated and its complexity proving that, in principle, being always best connected translates to a family of NP-hard problems is proved.
Abstract: The next generation of mobile communications, broadly referred to as 4G, is based on a heterogeneous infrastructure comprising different wireless (and wired) access systems in a complementary manner. 4G mobile users enjoys seamless mobility and ubiquitous access to applications in an always best connected (ABC) mode that employs the most efficient combination of available access systems. The ongoing commercialization of 3G cellular mobile networks and their upcoming enhancement with WLAN radio access provides a wireless platform suitable for the introduction of "ABC" capabilities. We analyze the implications of the "ABC" vision in a UMTS/WLAN network context, and reveal important issues that arise. Further on, we identify major requirements, point out the limitations of current UTMS/WLAN standards from an ABC viewpoint, and discuss key enabling technologies and research efforts. We formulate a generic application model for an ABC capability in the interworked UMTS/WLAN architecture and analyze its complexity proving that, in principle, being always best connected translates to a family of NP-hard problems. To complement our analysis, we present an object-oriented design of a real-time UML model for an ABC mobile system. Finally, we summarize the advantages of our ABC model and provide directions for future work.
145 citations
"QoS of different integration techni..." refers methods in this paper
...) A UMTS operator's network is interconnected by an independent WLAN [I] [3] [9]....
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TL;DR: In order to provide consistent QoS control over an integrated UMTS and WLAN system, a policy-based multidomain QoS management architecture is proposed in this article.
Abstract: Strong demands for public wireless broadband services will require more capacity than even that can be,supplied by advanced mobile cellular systems like the Universal Mobile Telecommunication System. The increasing popularity of WLANs has prompted mobile network operators to consider their deployment in high-density usage areas like indoor/outdoor public hotspots to provide complementary broadband access to their UMTS networks. In order to provide consistent QoS control over an integrated UMTS and WLAN system, a policy-based multidomain QoS management architecture is proposed in this article. Different UMTS-WLAN interworking scenarios are discussed to illustrate the feasibility of the proposed architecture.
102 citations
TL;DR: The results indicate that the WLAN can support seamless continuity of video sessions for only a limited number of UMTS subscribers, which depends on the applied WLAN policy, access parameters, and QoS requirements.
Abstract: This article addresses several challenges related to the evolution toward seamless interworking of wireless LAN and 3G cellular networks. The main objective is to evaluate the conditions and restrictions under which seamless continuity of video sessions across the two networks is feasible. For this purpose, we formulate a number of practical interworking scenarios, where UMTS subscribers with ongoing real-time video sessions hand over to WLAN, and we study the feasibility of seamless continuity by means of simulation. We particularly quantify the maximum number of UMTS subscribers that can be admitted to the WLAN, subject to maintaining the same level of UMTS QoS and respecting the WLAN policies. Our results indicate that the WLAN can support seamless continuity of video sessions for only a limited number of UMTS subscribers, which depends on the applied WLAN policy, access parameters, and QoS requirements. In addition to this study, we do address several other issues that are equally important to seamless session continuity, such as the QoS discrepancies across UMTS and WLAN, the vertical handover details, and various means of access control and differentiation between regular WLAN data users and UMTS subscribers. The framework for discussing these issues is created by considering a practical UMTS/WLAN interworking architecture.
65 citations
01 Nov 2008
TL;DR: A 3G/UMTS-WLAN loosely-coupled interworking architecture with mobile IP as a service continuity solution based on a mobile-controlled vertical handover management scheme that proposes an interesting answer to intersystem and inter-domain mobility management issues.
Abstract: In the new area of heterogeneous environments, roaming users, using multi-interface mobile terminals, need to access to services anytime and anywhere. For that, a seamless vertical handover has to be considered. In our paper, we propose a 3G/UMTS-WLAN loosely-coupled interworking architecture with mobile IP as a service continuity solution. We focus on a mobile-controlled vertical handover management scheme. Our solution chooses the best access network according to user preferences and it maintains the ongoing session. It has several advantages to be simple and to generate minor changes at the network side. Moreover, MIP-based handover execution procedure is prepared thanks to a handover decision taken at the mobile side. The scheme proposes an interesting answer to intersystem and inter-domain mobility management issues. Finally, a simulation model is developed to validate the feasibility of the proposed 3G/UMTS-WLAN architecture.
10 citations
"QoS of different integration techni..." refers background in this paper
...Between two networks, there is no seamless mobility supported i.e. the connection need to be terminated from current network to connect to another network [7] [8]....
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...The connection between WLAN network's AAA server (Authentication, Authorization and Accounting) and the UMTS network's HLR (Home Location Register) provides a common authentication scheme [7] [8]....
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