László Bokor

Design and Evaluation of a Novel HIP-Based Network Mobility Protocol

The rapid growth of IP-based mobile telecommunication technologies in the past few years has revealed situations where not only a single node but an entire network moves and changes its point of attachment to the Internet. The main goal of any protocol supporting network mobility is to provide continuous, optimal and secure Internet access to all nodes and even recursively nested mobile subnetworks inside a moving network. For this purpose, the IETF (Internet Engineering Task Force) has developed the NEtwork MObility Basic Support (NEMO BS) protocol which extends the operation of Mobile IPv6 (MIPv6). In order to bypass the same problems suffered by MIPv6 and NEMO BS, a novel Host Identity Protocol (HIP) extension called HIP-NEMO is introduced, proposed and evaluated in this paper. Our proposal is based on hierarchical topology of mobile RVSs (mRVS), signaling delegation and inter-mRVS communication to enable secure and efficient network mobility support in the HIP layer. The method provides secure connectivity and reachability for every node and nested subnet in the moving network and supports multihomed scenarios as well. Moreover, HIPNEMO reduces signaling and packet overhead during network mobility management by achieving route optimization inside any moving network even in nested scenarios. To evaluate the proposed scheme we present a simulation model implemented in OMNeT++ and discuss the results of our simulation based analysis to show the efficiency of the approach compared to the NEMO BS protocol formulated by the IETF.

Micromobility support in HIP: survey and extension of host identity protocol

The host identity protocol (HIP) is a rather new concept that separates the identity and location information both represented by IP addresses in the current Internet architecture. HIP also has capabilities and efficient extensions to serve macromobility, but it shows unnecessary signaling overhead and handoff latency, when used in micromobility environments. This paper introduces a new method how HIP can be extended to serve as a micromobility protocol

A HIP Based Network Mobility Protocol

The rapid growth of IP-based mobile telecommunication technologies in the past few years has revealed situations where not only a single node but an entire network moves and changes its point of attachment to the Internet. The main goal of any protocol supporting network mobility (NEMO) is to provide continuous, optimal and secure Internet access to all nodes and even recursively nested mobile subnetworks inside a moving network. This paper describes a Host Identity Protocol (HIP) extension called HIP-NEMO, based on hierarchical topology, signaling delegation and connection tracking to enable secure and efficient network mobility support in the HIP layer

Design and evaluation of host identity protocol (HIP) simulation framework for INET/OMNeT++

Host Identity Protocol (HIP) decouples IP addresses from higher layer Internet applications by proposing a new, cryptographic namespace for host identities. HIP has great potential in means of mobility and multihoming support, security, and performance, such making it quite a promising candidate as the basic architecture of the Future Internet. However, HIP is still in development and very early standardization phase: the protocol is continuously evolving due to its adaptivity to functional changes and extensions. Aiming to completely understand the protocols behavior, its applicability to wide-scale usage and to analyze current and future improvements and enhancements, it is crucial to develop a proper, RFC-compliant, extensible simulation model for Host Identity Protocol. In this paper we present the structural design and the functional details of our HIP simulation framework (called HIPSim++) integrated into the INET/OMNeT++ discrete event simulation environment. In order to evaluate the accuracy and preciseness of HIPSim++, we designed a real-life HIP testbed and compared the simulation outcomes with the reference results obtained from this HIP testing architecture. Our analysis show excellent accuracy and consistent operation of the simulation framework in terms of handover metrics (latency, packet loss, throughput) and behavior when compared to the real-life experiences of the HIP testbed.

Flat architectures: towards scalable future internet mobility

This chapter is committed to give a comprehensive overview of the scalability problems of mobile Internet nowadays and to show how the concept of flat and ultra flat architectures emerges due to its suitability and applicability for the future Internet. It also aims to introduce the basic ideas and the main paradigms behind the different flat networking approaches trying to cope with the continuously growing traffic demands. The discussion of the above areas will guide the readers from the basics of flat mobile Internet architectures to the paradigms complex feature set and power creating a novel Internet architecture for future mobile communications.

A delegation-based HIP signaling scheme for the Ultra Flat Architecture

The Ultra Flat Architecture is a new concept of fixed-mobile convergent networks that aims to scale well with the mobile Internet traffic explosion prognosticated for the next 5–10 years. This paper presents a new delegation-based UFA signaling framework using HIP, IEEE 802.21 and the context transfer protocol. The main procedures contributed by this signaling framework are terminal attachment, session establishment, proactive handover preparation and handover execution services. The paper introduces several novel Host Identity Protocol extensions, i.e., two different HIP delegation service types for optimized message exchange in HIP-based UFA mobility and multihoming operations, a context transfer scheme for HIP and IPsec associations supporting and extending the mechanisms of the delegation-based UFA functions, and a fast operator-centric method for HIP-level access authorization. The proposed UFA signaling framework is compared with the existing SIP-based UFA signaling solution. The comparison shows that our scheme is able to support legacy Internet applications in an operator based environment, it is stronger in security, but its deployment requires more additional modules in the architecture. For IMS applications, the SIP-based alternative is a better choice.

GPS aided predictive handover management for multihomed NEMO configurations

In this document we propose a new handover management solution which can be used to provide ubiquitous connections and seamless Internet access. The new solution is based on GPS position information and previous records of network parameters and exploits the benefits of multihomed mobility configurations. Based on actual GPS coordinates and previously recorded data, the system is able to predict handovers and to prepare itself for the appearance of networks. With the proposed solution, handover latency could almost be totally eliminated in multihomed networking environments.

A Distributed Dynamic Mobility Architecture with Integral Cross-Layered and Context-Aware Interface for Reliable Provision of High Bitrate mHealth Services

Mobile health (mHealth) has been receiving more and more attention recently as an emerging paradigm that brings together the evolution of advanced mobile and wireless communication technologies with the vision of “connected health” aiming to deliver the right care in the right place at the right time. However, there are several cardinal problems hampering the successful and widespread deployment of mHealth services from the mobile networking perspective. On one hand, issues of continuous wireless connectivity and mobility management must be solved in future heterogeneous mobile Internet architectures with ever growing traffic demands. On the other hand, Quality of Service (QoS) and Quality of Experience (QoE) must be guaranteed in a reliable, robust and diagnostically acceptable way. In this paper we propose a context- and content-aware, jointly optimized, distributed dynamic mobility management architecture to cope with the future traffic explosion and meet the medical QoS/QoE requirements in varying environments.

ANEMONE: A Pan-European Testbed to Validate IPv6 Mobility Technologies

The paper reports on an ongoing European Commission funded R&D project called ANEMONE, which aims at realizing a large-scale testbed for mobility technologies. This testbed will provide support of mobile users and devices, as well as enhanced services by integrating cutting edge IPv6 node and network mobility solutions. Among the key features of this deployment will be multihoming initiatives through the use of the current and emerging wireless access technologies. We review our progress of integrating existing testbeds and extensions covering campus and metropolitan areas with large spectrum of real end users, and discuss the conditions of creating this architecture

Evaluation and Comparison of Signaling Protocol Alternatives for the Ultra Flat Architecture

The Ultra Flat Architecture is a new concept of fixed mobile convergent networks that aims to scale well with the mobile internet traffic explosion prognosticated for the next 5–10 years. This paper investigates the adequacy of three different signaling protocol alternatives for the Ultra Flat Architecture based on operator requirements. The applied evaluation method is the Multiplicative Analytic Hierarchy Process. After the presentation of the evaluation process, we define our evaluation criteria. It is followed by the presentation of the main features of three UFA signaling protocol alternatives. Finally, the terminal scores of the alternatives are analyzed under different circumstances. The SIP-based alternative shows high performance, and low deployment cost. It is adequate for IMS applications. However by the increase of the demand to support the mobility of legacy internet applications, HIP or MIP-based signaling schemes are more suitable to our criteria. The evaluation shows the effect of the criteria weights and the network scenario on the suitability of the alternatives.