Distributed Mobility Management

http://www.ict-ijoin.eu/ @ict_ijoin

EU FP7 Project iJOIN

Distributed Mobility Management for future 5G networks

iJOIN Winter School

Feb. 23rd 2015 Carlos J. Bernardos (Universidad Carlos III de Madrid)

Contact: [email protected]

iJOIN: Interworking and JOINt Design of an Open Access and Backhaul Network Architecture for Small Cells based on Cloud Networks

http://www.ict-ijoin.eu/ @ict_ijoin (( 2 ))

Outline

Motivation Mobility management in 5G networks Why Distributed Mobility Management?

Distributed Mobility Management: main solutions

PMIPv6-based Routing-based SDN-based

Evaluation of the DMM solutions

Setup Experimental results

Conclusions


Motivation: Mobility management in 5G networks

5G networks should cope with mobile traffic increase 3 major trends to meet the traffic demand:

Enhancement of the wireless access Migration towards smarter (& cheaper) network management Flatter networks

Mobility is a key aspect for mobile/cellular networks

5G networks will serve more heterogeneous users & services Smaller cells Reduced OPEX & CAPEX


Motivation: Mobility management in 5G networks

Operators and vendors are continuously searching strategies to evolve mobile networking

Distributed Mobility Management (DMM) Flat architecture paradigm

Flexible and dynamic traffic anchoring

Enhanced radio interfaces for higher

data rates More efficient

network architecture

Smarter access network enriched with new features


Motivation: Why Distributed Mobility Management?

The classical mobility protocols are centralised MIPv4, MIPv6, PMIPv6, GTP Central entity (mobility anchor) anchors all the traffic

All traffic traverses the mobility anchor

A mobility anchor is usually deployed in the core Some (very) limited differentiation per service

Even if directed to peers nearby Even if the traffic is not critical for the operators

Black or white approach

Mobility support is provided or not It is not possible to provide fine-grained flow mobility


Motivation: Why Distributed Mobility Management?

DMM: Paradigm to design a novel flat architecture Flexible data plane

Local breakout to IP networks at access routers (similar to SIPTO) Distributed mobility functions

from the core to the edge of the mobile network

Centralized and hierarchical architecture

(current deployments)

Distributed and flat architecture

(future deployments?)


Distributed Mobility Management: main solutions

Distributed Mobility Management is a way of designing a flat mobility architecture

The IETF DMM WG is the main discussion venue

Three main DMM approaches: Mobile IP based

Routing based

SDN based

We next analyse each of them

legacy solution

5G solution


DMM main solutions

A mobility-enabled access router is called DMM-GW

Each DMM-GW owns a unique IPv6 prefix pool Assigns one to each

MN on link Plain router for prefix

when MN on-link Tunneling used to

route prefix when MN moves

DMM-GW DMM-GWs


DMM main solutions: PMIPv6-based

This solution is based on Proxy Mobile IPv6 Belongs to IP mobility solutions Adapts PMIPv6 to a flat network

Partially distributed

Control Mobility Database (CMD) is the central entity

responsible of managing the mobility

Networks nodes involved: DMM-GWs



1st attachment operations

RS

PBU PBA RA



Traffic exchange with CN1



Handover operations

RS

PBU PBA RA PBU PBA



IP-in-IP tunnel for traffic redirection


DMM main solutions: Routing-based

Removes any anchors, let the routing mechanism re-establish the path

Fully distributed

This solution employs BGP as routing protocol

Networks nodes involved: DMM-GWs All the BGP routers in the network domain



1st attachment operations

AUTH

DNS RA BGP-Up

BGP-Up

BGP-Up

BGP-Up

BGP-Up



Traffic exchange with CN1



Handover operations

AUTH

DNS RA BGP-Up

BGP-Up

BGP-Up

BGP-Up

BGP-Up



Traffic redirection


DMM main solutions: SDN-based

SDN based mobility solution with service differentiation support k Egress Routers (ER) are assigned to each MN

Egress Routers used for service differentiation

Partially distributed

Network Controller (NC) is the central entity responsible of managing the mobility

Networks nodes involved: DMM-GWs, Egress Routers



1st attachment operations, k=3

RS

OF OF OF OF RA



Traffic exchange with CN1 and CN2



Handover operations

RS

OF OF OF OF OF RA



Traffic redirection


DMM experimental evaluation: setup

802.11 access 3 DMM-GW 1 CMD/NC/DNS 1 MN & 1 CN

PMIPv6 Routing SDN

Linux-based platform Some code release as

Open Source: http://odmm.net/


DMM experimental evaluation: Handover latency

Layer-2 handover Interval between Deauthentication and Association response 802.11

messages

Layer-3 configuration Interval between Deauthentication and Router Advertisement messages

IP flow recovery

Interval between the last IP packet received by the MN before the handover and the first IP packet received after the handover



Quagga daemon takes on average ~3s since a new route is installed until the

daemon starts to distribute the BGP

updates back-to-back

Router protocols are not designed to react

immediately, ping-pong effects and messages

flooding

IP flow recovery



Layer-3 conf. composition Layer 2 + Router Adv. reception

MN gap: time needed by the MN to receive the Association response and send the Router

solicitation

Tx time: time needed for packets transmission

MN gap (2): In Routing solution, the MN does not send any Router

solicitation


Conclusions

Objectives of this work Evaluation and comparison of the main DMM solutions families

Contribution

SDN-based solution has been designed from scratch

All the solutions have been prototyped Feasibilitys proof of each solution

Experimental evaluation

PMIPv6 and SDN can provide mobility in a timely manner At current state Routing-based is not a viable solution

[1] Distributed Mobility Management for future 5G networks: overview and analysis of existing approaches, F. Giust, L. Cominardi and CJ. Bernardos, IEEE Communications Magazine, Volume 53, Issue 1, pp. 142-149, Jan. 2015


Thank you for your attention!

EU FP7 Project iJOINDistributed Mobility Managementfor future 5G networksOutlineMotivation: Mobility management in 5G networks Motivation: Mobility management in 5G networksMotivation: Why Distributed Mobility Management?Motivation: Why Distributed Mobility Management?Distributed Mobility Management: main solutionsDMM main solutionsDMM main solutions: PMIPv6-basedDMM main solutions: PMIPv6-basedDMM main solutions: PMIPv6-basedDMM main solutions: PMIPv6-basedDMM main solutions: PMIPv6-basedDMM main solutions: Routing-basedDMM main solutions: Routing-basedDMM main solutions: Routing-basedDMM main solutions: Routing-basedDMM main solutions: Routing-basedDMM main solutions: SDN-basedDMM main solutions: SDN-basedDMM main solutions: SDN-basedDMM main solutions: SDN-basedDMM main solutions: SDN-basedDMM experimental evaluation: setupDMM experimental evaluation: Handover latencyDMM experimental evaluation: Handover latencyDMM experimental evaluation: Handover latencyConclusionsFoliennummer 29

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Distributed Mobility Management

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