Rafael Vidal Ferré

Improving fast handovers for mobile IPv6: optimal crossover discovery using geopaging routing tables

Fast handovers for mobile IPv6 (FMIPv6) reduces packet loss by providing fast IP connectivity as soon as a new link is established. It does so by fixing up the routing during link configuration and binding update, so that packets delivered to the old care of address are forwarded to the new. This forwarding produces a non-optimal routing, that is, it increases end-to-end delay and wastes bandwidth. In this paper, a mechanism called optimal crossover router discovery (OCRD) is introduced in combination with an extension of FMIPv6 in order to solve this problem. An OCRD approach is presented It relies on the routing tables of geopaging, an IPv6 multicast protocol designed to efficiently transport paging.

Geopaging: a novel multicast approach to IP paging delivery

This paper introduces a new global solution in order to achieve a very efficient IP paging delivery. This efficiency is accomplished in terms of number of messages sent in both, wireless access and core networks. Reduction of signalling is achieved using a distance-based dynamic strategy combined with multicast.

IEEE 802.11 networks with dormant mode support: an IP paging approach and its performance analysis

IEEE802.11 networks are changing its primary role of extension of private LANs to become an access technology in competition or collaboration with current cellular networks. In addition, large-scale IEEE802.11 deployments are a reality that mesh networks can contribute to expand. But not only, networks are changing; their users are doing the same. More portable devices as WiFi enabled PDAs or phones will allow an increase of their number and mobility, but suffering from severe battery constraints. In addition, the interest in VoIP over WLAN will introduce the need of establishing sessions to WLAN users and not only from them. In order to support similar conditions, current cellular systems make use of a dormant mode with paging support which is inexistent in the IEEE802.11 networks. In this paper we propose the introduction of IP paging in IEEE802.11 networks in order to solve this problem. The aim of this paper is to demonstrate the usability of IP paging in order to reduce the mobility signaling cost. This is achieved through a new analytical approach that evaluates the following parameters: the call-to-mobility ratio (CMR), the size of the radio access network (RAN) and the size of the paging area. The solutions analyzed are the Hierarchical Mobile IPv6 (HMIPv6) protocol and a new extended version of this with IP paging support. The novelty of this latter version lies in its use of distance-based dynamic paging areas and its specific design for IEEE802.11 networks.

Deploying Large-Scale IEEE802.11 Networks Using IP Paging with Link-Specific Capabilities: A Standard Compliant Approach and its Performance Analysis

IEEE802.11 is a layer two technology that offers limited mobility support. It suffers from scalability problems caused by the performance of the mechanisms related to the address resolution and the discovery and maintenance of the path information. In this paper, we propose using IP paging with link-specific capabilities to solve this problem. The need of these capabilities is justified showing the limitations of pure-IP solutions when they interact with IEEE802.11 specific functions, mainly the power save mode (PSM). Then, a comprehensive proposal for an IP paging solution that is an extension of the Mobile IPv4 Regional Registration (MIPv4-RR) protocol is presented. Its strengths lie in the fact that there are no interaction problems with PSM, and it is fully compliant with existing IEEE802.11 devices. Finally, in order to show the excellent scalability of our link-specific solution, we carry out an analytical study of its mobility signaling and compare it with the standard MIPv4-RR protocol and IIPP (Integrated IP Paging Protocol), another IP paging solution that does not implement link-specific functions.IEEE802.11 is a layer two technology that offers limited mobility support. It suffers from scalability problems caused by the performance of the mechanisms related to the address resolution and the discovery and maintenance of the path information. In this paper, we propose using IP paging with link-specific capabilities to solve this problem. The need of these capabilities is justified showing the limitations of pure-IP solutions when they interact with IEEE802.11 specific functions, mainly the power save mode (PSM). Then, a comprehensive proposal for an IP paging solution that is an extension of the Mobile IPv4 Regional Registration (MIPv4-RR) protocol is presented. Its strengths lie in the fact that there are no interaction problems with PSM, and it is fully compliant with existing IEEE802.11 devices. Finally, in order to show the excellent scalability of our link-specific solution, we carry out an analytical study of its mobility signaling and compare it with the standard MIPv4-RR protocol and IIPP (Integrated IP Paging Protocol), another IP paging solution that does not implement link-specific functions.

A multicast protocol for optimal IP paging support and seamless handover in 4G networks

A very efficient IP paging delivery solution is presented based on a new multicast protocol, geopaging. This efficiency is determined by number of messages sent in both wireless access and core networks. Reduction of signaling is achieved using a distance-based dynamic location update strategy combined with multicast. In addition, geopaging may help to make seamless the IP handover procedure.