UPMT – Universal Per-application Mobility management using Tunnels Stefano Salsano -...

UPMT – Universal Per-application Mobility management using Tunnels

Stefano Salsano - [email protected] Bonola - [email protected]

Always best connected (ABC)

ABC service concept: automatic selection of the “best” interface in the mobile device

Dates back to the early 2000, but turning ABC services into reality is still a challenge:– Need to change networking equipment, existing

applications, networking stacks ?

– True ABC services require “per-application” mobility, typical solutions offers “per-device” mobility

3G offload renews interest in ABC concept

UPMT: Universal Per-application Mobility management using Tunnels

per-application independent management of connectivity (even per-flow)

Key features

works on existing networks supports private IP networks / NAT works with ALL existing applications no changes in the correspondent hosts

implemented on Linux and Android platforms

IP in UDP tunnels from the Mobile Host to the Anchor Node, one tunnel for interface

The Anchor Node provides a “second level” NAT, the Correspondent Hosts are unaware of UPMT

Each application can be independently sent over one of the tunnels

The applications see a Virtual Interface, they are shielded from any mobility/handover issue and from loss of connectivity on the physical interfaces

SIP protocol is used for mobility management signaling between Mobile Host and Anchor Node

Basic principles of UPMT(see figure in next slide)

Basic principles of UPMT

Mobile Host (MH)

CorrespondentHost (CH)

Anchor Node(AN)

NAT 1

NAT 2

“second level”NAT

IP/UDP Tunnel 2

IP/UDP Tunnel 1

PublicInternet

Access Networks

“first level”NAT

VirtualInterface

UPMT scalability

Mobile Host (MH)

AN1

AN2(public IPs)

AN3

Public InternetLocalNAT

LocalNAT

AnchorNAT

Corresp.HostAnchor

Node (AN)

The basic scenario foreseesa “centralized” Anchor Node

UPMT scalability

Mobile Host (MH)

AN1

AN2(public IPs)

AN3


LocalNAT

AnchorNAT

AnchorNode (AN) 2

Corresp.Host

Corresp.Host

AnchorNode (AN)

Multiple Anchor Nodescan be supported…

UPMT scalability

Mobile Host (MH)

AN1

AN2(public IPs)

AN3

Fixed Host,e.g. for example:Public Internet

LocalNAT

LocalNAT

AnchorNAT

AnchorNode (AN)

A “fixed” host with UPMT modules canplay the role of the Anchor Node !

… and other over-the-top providers

Mobile Host (MH)

AN1

AN2(public IPs)

AN3


LocalNAT

MHNAT

Mobile Host (MH)

AnchorNode (AN)

UPMT scalability

Direct Mobile Host to Mobile Host communication (work in progress!)

Policies: some examples

Never run “bulk transfer” applications on expensive and/or resource-limited access nets.

When connected as a guest to a wifi that only provide web access, use the wifi only for the browser.

For a voice call, use wifi if the quality is OK, move to 3G if the quality on wifi is bad AND the quality on 3G is better.

Linux GUIs for policies and monitoring

Performances

MH - Mobile HostAN – Anchor Node

Packets/s

Packets/s

System level performances: the validity of kernel level implementation

User level performances

Linux and Android implementation

The UPMT implementation is open sourcehttp://netgroup.uniroma2.it/UPMT

Tunneling and flow classification are implemented in kernel space for performance/scalability

A UPMT Live distribution for Linux is available, it can be configured to be a Mobile Host or an Anchor Node

Ported on Android (2.2 Platform), Nexus one terminal– Kernel modules ported, patch to support more network interfaces

– Android image can be downloaded

Business scenarios

UPMT can be used in different business scenarios:

Operator centric

User centric

Corporate Net. centric

Aggregator centric

Over-the-top Prov. centric

Take home message

To the best of our knowledge, UPMT is the only implemented solution that provides:

– per-application handover

– support of all legacy applications

– overlay approach with no support from routers and access network

– support of NAT

– support of legacy correspondent host

moreover, it is open source…

References

M. Bonola, S. Salsano, A. Polidoro, “UPMT: Universal Per-Application Mobility Management using Tunnels”, IEEE GLOBECOM 2009

M. Bonola, S. Salsano, “Achieving Scalability in the UPMT Mobility Management Solution”, Future Network & Mobile Summit 2010, 16 – 18 June 2010, Florence, Italy.

M. Bonola, S. Salsano, “Per-application Mobility Management: Performance Evaluation of the UPMT Solution”, IWCMC 2011, Istanbul, Turkey, July 2011

S. Salsano, M. Bonola, “The UPMT solution”, technical report, http://netgroup.uniroma2.it/TR/UPMT.pdf

UPMT – Universal Per-application Mobility management using Tunnels Stefano Salsano -...

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