LL-MEC

Mosaic5G A c o m m u n i t y L e d C o n s o r t i u m

What is LL-MEC?

A Low Latency Multi-access Edge

Computing Platform for Software-Defined

Mobile Network

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LL-MEC objectives

User-plane (UP) monitoring and programmability in S1/N3/N6/N9 and potentially in F1 for 4G and 5G

Fine-grained UP slicing in support of QoS

IP-service endpoint and real-time RAN information

on per user/service basis

Low latency 4G/5G xApps

5G System Architecture

(source: 3GPP TS23.501)

Implemented use-cases

Video optimization (*)

Traffic steering

End-to-End (E2E) network slicing

Dedicated core network

Internet of Things (IoT) gateway

LL-MEC use-case examples

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Possible use-cases

Service offloading

Load balancing

Content caching

Recommendation system

(*) https://gitlab.eurecom.fr/mosaic5g/mosaic5g/-/wikis/tutorials/ran-aware-video-optimisation

SDN-based UPF and SPGW (CUPS)

Leveraging OpenVirtualSwitch (OVS) with GPRS Tunnelling Protocol (GTP) support and OpenFlow (OF) protocol (v1.3)

Abstraction and Programmability

Well-defined Northbound interface (Nbi)

Traffic rules are automatically generated and pushed based on user activities

attach/detach & service request

Low latency xApps

Flexible application programming framework

Local apps with access and runtime privilege

Event-driven interaction among the xApps

Service-development kit

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LL-MEC high-level features

UPF - User Plane Function, SPGW - Serving/PDN Gateway, CUPS - Control and User Plane Separation

LL-MEC architecture

LL-MEC Platform

Edge packet service (EPS) Traffic Rule Control

Multi OF libs, OVS-GTP

Static and dynamic rules

Radio network information services (RNIS)

Real-time control and monitoring

Abstraction layer (Mp2 type IF)

Data plane APIs: OpenFlow protocol

C-plane Radio API: FlexRAN protocol

Application manager (Mp1 type IF)

Elastic: Rest-API

Low-latency: Core-API

ETSI Mp1 reference point

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LL-MEC controller

From scratch in C++ and

Python

x64 Linux support

Apache V2.0 license

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Current implementation (1/2)

GTP enabled OVS

OVS 2.7.0 applied with GTP

patch

x64 Linux support (4.9 kernel)

Apache V2.0 license

LL-MEC implemented features

Add/delete/get UE/slice

Get flow statistics

Traffic redirection/forwarding

LL-MEC experimental features

Traffic Metering in support of

Slicing/QoS

MEC Mp1 APIs: ETSI MEC 011

MEC Radio Network Information

(RNI) APIs: ETSI MEC 012

New event handling for

RNI/MP1/LL-MEC events

Copy packets per user/slice

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Current implementation (2/2)

LL-MEC NB API

API Target Direction Example Applications

Add UE / Slice UE, Slice EPC Slice • Create session request • SGi endpoint update

• Slice create

• Core network CU

• SPGWC

Delete UE / Slice UE, Slice EPC Slice • Release access bearer request

• SGi endpoint update

• Slice destroy

• Core network CU

• SPGWC

Get UE / Slice info UE, Slice EPC Slice • Scheduling decisions • Coordinated slicing

• Monitoring

Redirect UE / Slice UE, Slice EPC Slice • Video optimization

• IoT gateway

• Control actions • Programmability

Get flow statistic Stats EPC Slice • Traffic shaping • Monitoring

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LL-MEC ETSI MEC Mp1 API

Group API Description

Mp1 Services

Create Mp1 service • Create/Register a Mp1 service

Update Mp1 service • Update a Mp1 service

Get service Info • Get information of a Mp1 service

Query service availability • Query the availability of a service

Mp1 Subscriptions

Create Mp1 subscription • Create a new subscription to the service availability notification

Delete Mp1 subscription • Delete a Mp1 subscription

Retrieve subscription information • Info subscription for an app instance

• Info for all subscriptions for an app instance

RNI Services

Get PLMN Info • Get the PLMN info associated with an app instance

Create/delete/update a subscription to RAB_Est notification

• Create/delete/update a subscription to RAB establishment notification from RNI service

Get RAB_Est subscription info • Get information of a RAB establishment subscription

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Leverage OpenFlow as Mp2 reference point

UPF N4 interface

OVS-GTP needs to be updated to support additional GTP headers for 5G (e.g.,

QoS Flow Identifier (QFI))

Leverage Packet Forwarding Control Protocol (PFCP) as the

protocol for the Mp2 reference point

introduce PFCP into LL-MEC

UPF: OAI SPGWU(OAI-CNv2), OAI UPF (OAI-CN 5G)

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Road to 5G

Useful links

Website: https://mosaic5g.io/ll-mec

Git repositories:

https://gitlab.eurecom.fr/mosaic5g/ll-mec

https://gitlab.eurecom.fr/mosaic5g/ll-mec-ovs

Snap : https://snapcraft.io/ll-mec

Docker: https://hub.docker.com/r/mosaic5gecosys/ll-mec

API doc: https://mosaic5g.io/ll-mec/#apidocs

Tutorials:

LL-MEC deployment with OAI-CNv2: https://gitlab.eurecom.fr/mosaic5g/ll-mec/-/wikis/LL-MEC-with-OAI-CNv2

OVS-GTP: https://gitlab.eurecom.fr/mosaic5g/mosaic5g/-/wikis/tutorials/ovs-gtp

Videos:

OAI-CNv2 deployment: https://www.youtube.com/watch?v=oFGj_FGpqEw&feature=youtu.be

LL-MEC deployment with OAI-CNv2: https://www.youtube.com/watch?v=Mkv6xHkSHUs&t=6s

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Mosaic5G-Contact

E-mail: llmec@mosaic-5g.io

Website: mosaic-5g.io

Twitter: @mosaic5g

Linkedin: mosaic-5g

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LL-MEC Demo

Traffic redirection feature with L2 simulator

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LL-MEC deployment: high-level view

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Traffic redirection: possible use-cases (2/2)

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Traffic Steering

Video optimization

Traffic redirection: possible use-cases (1/2)

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Traffic steering

Video optimization

https://gitlab.eurecom.fr/mosaic5g/mosaic5g/-/wikis/tutorials/ran-aware-video-optimisation

LL-MEC: a deployment example

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(Quick) OAI-CNv2, LL-MEC, OVS-GTP and L2 Simulator setup

Multiple UEs with L2 simulator (UE attachment, internet connection)

Traffic statistics for monitoring/data mining

Traffic redirection/forwarding

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Demo description (1/4)

Demo description (2/4)

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Launch OAI-CNv2 components, LL-MEC, OVS-GTP

Launch simulated eNB/UE

Attach UE 0/1/2.. to the network (observing LL-MEC/OVS-GTP)

Test UE traffic with Ping

For UE0: $ ping -I 12.1.1.2 google.com

LL-MEC with OAI-CNv2: Multi-UE with L2 simulator

LL-MEC live demo

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Demo description (3/4)

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From a browser

http://192.168.10.10:9999/stats

From the command line, manipulate with jq, watch script

Get all flow statistics

$ curl 192.168.10.10:9999/stats | jq .

$ watch “curl 192.168.10.10:9999/stats | jq–f 2-stats.jq”

Get a particular traffic flow statistics (IMSI and bearer ID)

$ curl -X GET 192.168.10.10:9999/stats/imsi_bearer/208950000000002,5 (208950000000013: IMSI, 5:

EPS Bearer ID)

Traffic statistic for monitoring/data mining

LL-MEC live demo

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Demo description (4/4)

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(UE0) Download a file from a remote server using wget

$ wget --bind 12.1.1.2 --no-check-certificate 'http://vtn.company/ll-mec-video-final-09.09.20.mp4’

(UE0)Apply traffic redirection API to redirect the request to an edge server (in GW node), so to get file from this server

$ curl -X POST http://192.168.10.10:9999/bearer/redirect/imsi_bearer/208950000000013,5 -d '{"from":"159.203.107.199", "to":"172.16.1.253"}'

159.203.107.199: remote server Ip Addr (vtn.company), 172.16.1.253: GW IP Addr, 208950000000013: IMSI, 5: EPS Bearer ID

Traffic redirection/forwarding feature

LL-MEC live demo

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Mosaic5G-Contact

E-mail: llmec@mosaic-5g.io

Website: mosaic-5g.io

Twitter: @mosaic5g

Linkedin: mosaic-5g

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