Next generation mobility management: an introduction (original) (raw)

Mobility and Handoff Management in Wireless Networks

Book Chapter in “Trends in Telecommunications Technologies”, Christos. J. Bouras (Ed.), ISBN: 978-953-307-072-8, INTECH Publishers, Croatia, March, 2010. Chapter 22, pp. 457- 484., 2010

The chapter is organized as follows. Section 2 introduces the concept of mobility management and its two important components- location management and handoff management. Section 3 presents various network layer protocols for macro-mobility and micro-mobility. Section 4 discusses various link layer protocols for location management. Section 5 introduces the concept of handoff. Different types of handoff mechanisms are classified, and the delays associated with a handoff procedure are identified. Some important cross-layer handoff mechanisms are discussed in detail. Section 6 presents media independent handover (MIH) services as proposed in IEEE 802.21 standards. It also discusses how MIH services can be utilized for designing seamless mobility protocols in next-generation heterogeneous wireless networks. Section 7 discusses security issues in handover protocols. Section 8 identifies some open areas of research in mobility management. Section 9 concludes the chapter.

MOBILITY MANAGEMENT & HANDOFF TECHNIQUES FOR WIRELESS MOBILE COMPUTING AND COMMUNICATIONS

Mobile wireless technology has gained tremendous popularity due to its ability to provide ubiquitous information access to users on the move. However, presently there is no single wireless technology that is capable of simultaneously providing a low latency, high bandwidth, wide area data services to large number of mobile users. In this heterogeneous network environment, mobility management is a critical issue. The integration of existing and emerging heterogeneous wireless networks requires the design of intelligent handoff and location management schemes to enable mobile users to switch network access and experience uninterrupted service continuity anywhere, anytime. Real deployment of such mobility strategies remains a significant challenge. In this paper, the focus is on various existing methods for various types of handoff management under mobility management. It is survey of various methods of handoffs. Furthermore, it also presents and discusses limitations of recent handoff design architectures and protocols as well as outstanding challenges that still need to be addressed to achieve portable and scalable handoff solutions for continuous connectivity across wireless access networks. Finally paper concluded with some techniques which may minimize the existing problem in mobility management.

Mobility and Handoff Management in Next Generation Wireless Networks

B. Tech (CSE) Seminar Report, Semester VI, Department of Computer Science and Engineering, NIST, Odisha, India., 2013

For efficient delivery of services to the mobile users, the next-generation wireless networks require new mechanisms of mobility management where the location of every user is proactively determined before the service is delivered. Moreover, for designing an adaptive communication protocol, various existing mobility management schemes are to be seamlessly integrated. In this seminar, the design issues of a number of mobility management schemes will be studied. Each of these schemes utilizes IP-based technologies to enable efficient roaming in heterogeneous network. Since efficient handoff mechanisms are essential for ensuring seamless connectivity and uninterrupted service delivery, a number of handoff schemes for heterogeneous networking environment will also be studied and presented.

Location-Aided Handover in Heterogeneous Wireless Networks

Wireless Personal Communications, 2004

The concept of being always online, regardless of the time and place, has been one of the hot topics in the commercial and scientific forums during the last years. The term itself is not solidly defined, however it is often used to refer to user's ability to get the same services via changing variety of underlying networks. In order to really work, this kind of multiaccess in heterogeneous networks still requires research, technological achievements and even compromises. The key to successfully implement the multiaccess is vertical handover that allows the application services to be seamlessly transferred between different networks. Juuso Pesola was born in Oulu, Finland on March 1971. He has studied Computer Science in Helsinki University and Electrical and Communications Engineering in Helsinki University of Technology. In his studies he has focused on telecommunication protocols and telecommunications software. Mr. Pesola has been working for VTT Information Technology since 1996. During his career and studies, he has been participating in several national and international research projects, including several ACTS and IST projects, e.g. CELLO (Cellular network optimization based on mobile location) MAGNET (My Personal Adaptive NET). In addition, he has been working in several projects developing communication software for telecommunication industry. He has published several papers. Mr. Pesola's special interest areas are embedded communication systems and platforms, security of communication systems, mobility in IP Networks, and mobile applications and services.

A Cross-Layer (Layer 2 + 3) Handoff Management Protocol for Next-Generation Wireless Systems

IEEE Transactions on Mobile Computing, 2006

Next-generation wireless systems (NGWS) integrate different wireless networks, each of which is optimized for some specific services and coverage area to provide ubiquitous communications to the mobile users. It is an important and challenging issue to support seamless handoff management in this integrated architecture. The existing handoff management protocols are not sufficient to guarantee handoff support that is transparent to the applications in NGWS. In this work, a cross-layer (Layer 2 + 3) handoff management protocol, CHMP, is developed to support seamless intra and intersystem handoff management in NGWS. Cross-layer handoff management protocol uses mobile's speed and handoff signaling delay information to enhance the handoff performance of Mobile IP that is proposed to support mobility management in wireless IP networks. First, the handoff performance of Mobile IP is analyzed with respect to its sensitivity to the link layer (Layer 2) and network layer (Layer 3) parameters. Then, a cross-layer handoff management architecture is developed using the insights learnt from the analysis. Based on this architecture, the detailed design of CHMP is carried out. Finally, extensive simulation experiments are carried out to evaluate the performance of CHMP. The theoretical analysis and simulation results show that CHMP significantly enhances the performance of both intra and intersystem handoffs.

An anticipated handoff management mechanism for next generation wireless networks

2008 Mosharaka International Conference on Communications, Propagation and Electronics, 2008

In next generation heterogeneous networks, mobiles users want to benefit from all the advantages of the integrated access networks by switching between them dynamically. In this paper, we propose a novel scheme for reducing handoff delay using the received signal strength (RSS) and the mobile station speed to reserve available resources for a user from its adjacent cells according to its current position. The Performances of the proposed scheme are compared with others methods by simulation. Our new scheme reduces not only the handoff blocking probability, but also maintains a low new call blocking probability and high bandwidth utilisation rate.

Fast-handoff schemes for application layer mobility management

2004

In order to ensure proper quality of service for real-time communication in a mobile wireless Internet environment it is essential to minimize the transient packet loss when the mobile is moving between different cells (subnets) within a domain. Network layer mobility management schemes have been proposed to provide optimized fast-handoff for multimedia streams during a client's frequent movement within a domain. This paper introduces application layer techniques to achieve fasthandoff for real-time RTP/UDP based multimedia traffic in a SIP signaling environment. These techniques are based on standard SIP components such as user agent and proxy which usually participate to set up and tear down the multimedia sessions between the mobiles. Unlike network layer techniques, application layer techniques do not have to depend upon any additional components such as home agent and foreign agent. It thus provides a network access independent solution suitable for application service providers.

Analysis of handoff in a location-aware vertical multi-access network

Computer Networks, 2005

Integration of WLAN hotspots into next generation cellular networks requires considerations on location management, resource allocation, handoff algorithms and their sensitivity to mobility related features such as velocity of the mobile and the handoff delay. This article presents architecture for seamless location-aware integration of WLAN hotspots into cellular networks and provides an analysis for an optimal handoff decision in moving in and out of a hotspot. For a mobile station, it may be beneficial to know the whereabouts of the hotspots in order to facilitate optimal handoff between the two access networks. In an integrated cellular-WLAN environment, one has to consider location management as part of mobility management due to differences in the cell sizes of the two overlapping technologies. Location information acquired through GPS may be helpful in some cases for advanced location management. In this paper we propose a location-aware architecture to support vertical roaming among heterogeneous wireless access networks. The article includes a description of a preliminary system architecture and the procedures and algorithms needed to implement mobility and location management. In conclusion, a comparison is given of two handoff algorithms (power and dwell-timer based) for moving-in and moving-out transitions, and their sensitivity to mobile velocity and handoff delay.