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A DUAL MOBILITY ARCHITECTURE PROVIDING SCALABLE SIGNALING AND OPTIMAL PATH FORWARDING

IP.com Disclosure Number: IPCOM000245948D
Publication Date: 2016-Apr-19

Publishing Venue

The IP.com Prior Art Database

Related People

Marc Portoles Comeras: AUTHOR [+4]

Abstract

A mobility architecture is provided that exploits the use of multipath transport protocols to break the existing trade-off between providing path optimization and offering a scalable signaling mechanism for fast path restoration. The architecture is based on three simple elements that are easy to port to any of the existing mobility solutions. This architecture is based on a key novel insight into the trade-offs driving the design of mobility protocols when combined with multipath transport protocols. The observation is used to define a new approach to this problem. This solution can be used to design a scalable mobility architecture with fast connectivity restoration that still converges to path optimization.

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A DUAL MOBILITY ARCHITECTURE PROVIDING SCALABLE SIGNALING AND OPTIMAL PATH FORWARDING

    AUTHORS: Marc Portoles Comeras Albert Cabellos Aparicio

Florin Coras Fabio Maino

CISCO SYSTEMS, INC.

ABSTRACT

    A mobility architecture is provided that exploits the use of multipath transport protocols to break the existing trade-off between providing path optimization and offering a scalable signaling mechanism for fast path restoration. The architecture is based on three simple elements that are easy to port to any of the existing mobility solutions. This architecture is based on a key novel insight into the trade-offs driving the design of mobility protocols when combined with multipath transport protocols. The observation is used to define a new approach to this problem. This solution can be used to design a scalable mobility architecture with fast connectivity restoration that still converges to path optimization.

DETAILED DESCRIPTION

     Mobility protocols in packet networks are traditionally designed with a fundamental assumption: end-hosts run single-path transport protocols. The single-path mindset leads to multiple design trade-offs that every solution must face, such as the path stretch or path optimization option and the choice between distributed location caching and centralized caching.

    However, there is a new group of protocols and solutions running on end-host operating systems that exploit the availability of multiple paths in the network. These protocols are able to generate multiple subflows, associated to a single communication pair, which can be routed independently throughout the network. When these protocols

Copyright 2016 Cisco Systems, Inc.

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are used in combination with mobility solutions the network can work with a different set of trade-offs that allow for a richer set of options.

    Presented herein is a new mobility architecture that builds on this observation. In particular, this architecture exploits the fact that with multipath protocols a mobility solution can offer signaling scalability while still converging to offer proper path optimization. In particular, when running multipath protocols, the mobility architecture can revolve around offering multiple locations for a mobile host, which can be used simultaneously.

    This mobility architecture is specially suited to exploit the availability of multipath transport protocols. In essence, this proposal builds on the observation that the classical trade-off between path optimization and fast restoration (or limited restoration overhead) is no longer necessary when end-hosts are multipath capable. The architecture focuses around maintaining a system invariant that provides multiple locations (or paths) to a mobile node. The mobility signaling is structured so that at least one of the locations is current while updating the rest can be done at a slower pace.

    Used herein is the same terminology as defined in the classical mobility survey by Pravin Bhagwat and Cha...