How To Import Slides From Other Decks - Amazon S3s3.amazonaws.com/JuJaMa.UserContent/84c396d5-f455... · CPICH power Predictive performance changes Impacts from all subscribers on

Self-Learning, Location-aware

Dr Chris Murphy

Research Director

June 2016

Self-Organizing

Networks

2 © 2016 Viavi Solutions Inc. www.viavisolutions.com

Extreme non-uniformity in mobile networks

Time

•Ga

me

ch

an

gin

g

pe

rfo

rma

nce

&

Qo

E th

rou

gh

cu

sto

me

r-ce

ntr

ic S

ON

Subscriber

Location

Application

Voice Traffic

• Consumed in

business district

Data Traffic

• Consumed in

restaurants and

leisure areas

http://www.viavisolutions.com/


Towards comprehensive subscriber-centricity

• Legacy focus on network KPIs rather than subscriber experience Network Centric

• Sensitive to classes of subscriber and subscriber locations Subscriber Aware

• Focus on customer experience metrics Subscriber Centric

• Drives performance independently for segmented subscriber groups

Targeted Optimization



Subscriber Aware SON – Self Healing



What are the overall effects on the whole subscriber population of parameter changes?

What are the effects on the QoS for a subscriber?

What service(s) are used by that subscriber?

Is the changed accessability

acceptable for that service?

Is the changed retainability

acceptable for that service?

Is the changed

throughput acceptable

for that service?

What is the serving cell as a result of the changes?

What is the interference arising from the

changes in all other subscribers that

impact this subscriber?

Reference signal

gain

Remote electrical

tilt

Sector power

allocation

CPICH power

Predictive performance changes

Impacts from all subscribers on network performance

What is the new received signal strength and signal to noise ratio?



Subscriber-centric optimisation

0

0.5

1

1.5

2

2.5

3

3.5

4

0 0.2 0.4 0.6 0.8 1

Bu

rst R

ate

(M

bp

s)

Cumulative distribution

BEFORE PREDICTED AFTER

Change in

burst rate

accurately

predicted

Improved

burst rate

after

change

Predicted RSCP Improvement

650

750

850

950

1050

1150

1250

01-S

ep

-14

03-S

ep

-14

05-S

ep

-14

09-S

ep

-14

11-S

ep

-14

15-S

ep

-14

17-S

ep

-14

19-S

ep

-14

23-S

ep

-14

25-S

ep

-14

29-S

ep

-14

01-O

ct-

14

03-O

ct-

14

07-O

ct-

14

09-O

ct-

14

13-O

ct-

14

15-O

ct-

14

17-O

ct-

14

21-O

ct-

14

23-O

ct-

14

27-O

ct-

14

29-O

ct-

14

Throughput

75

80

85

90

95

100

Accessibility Accessability:

ability to initiate a service

Throughput

Delta ~= +2%

BEFORE PREDICTED AFTER

Avera

ge R

SC

P (

dB

m)



Drivers for subscriber-centricity – selective optimization

Connection type Example use case

Critical subscriber Improve service for first responders, mission-

critical workers

Service type Improve service for VoLTE connections, video

connections

Location Optimize connections in specific buildings, e.g.

corporate headquarters.

Route Ensure good service on specific roads

Subscription type Bespoke quality of service for corporate customer,

roamer, pre-paid, post-paid, etc

Speed More resilient connections to support subscribers

in vehicles

Device capability Service tailored to those devices not able to use

other network layers



Selective optimization for application - VoLTE

Baseline After

Accessability 99.90% 99.92%

Accessability (VoLTE) 99.82% 99.82%

Retainability 99.44% 99.46%

Retainability (VoLTE) 97.48% 98.03%

Mean throughput 6.56 7.46

0

0.2

0.4

0.6

0.8

1

-18 -16 -14 -12 -10 -8 -6 -4 -2 0

RSRQ CDF (dB)

Baseline

After

Signal to noise ratio

shifted to the right

by optimisation

Optimisation

targeted at VoLTE

retainability

Retainability: ability to sustain a service

Accessability: ability to initiate a service



RAN Evolution



Example SON reconfiguration options for evolved RAN

CU RU

CU RU CU RU

Interference

management with

Coordinated Multi

Point (CoMP)

Flexible capacity

with on-demand

small cells



Pre-Network Slicing – Legacy Infrastructure RAN

Infrastructure Core

Infrastructure

Transport

Infrastructure

Radio

Resource

Application

Infrastructure

Prioritization for QoS

Commercial subscriber Massive IoT

VoLTE

Video

Other service Mission Critical subscriber

Commercial VoLTE

Other Service

Mission Critical Streaming

Mission Critical Other Service



RAN

Infrastructure Core

Infrastructure

Transport

Infrastructure

Radio

Resource

Application

Infrastructure

Commercial VoLTE

Other Service



Network Slicing in Virtualized Infrastructure


VoLTE

Video


Resource management, orchestration and SDN Prioritization for QoS



RAN

Infrastructure Core

Infrastructure

Transport

Infrastructure

Radio

Resource

Application

Infrastructure

Commercial VoLTE

Other Service



Network Slicing to the Edge with CRAN


VoLTE

Video





RAN

Infrastructure Core

Infrastructure

Transport

Infrastructure

Radio

Resource

Application

Infrastructure

Commercial VoLTE

Other Service



Network Slicing to the Edge with CRAN


VoLTE

Video





Network Slicing Towards the Device - Subscriber-Centric

Optimization RAN

Infrastructure Core

Infrastructure

Transport

Infrastructure

Radio

Resource

Application

Infrastructure


VoLTE

Video


Commercial VoLTE

Other Service



Resource management, orchestration, SDN and subscriber-centric SON


16 © 2016 Viavi Solutions Inc. www.viavisolutions.com 16 © 2016 Viavi Solutions Inc. www.viavisolutions.com

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How To Import Slides From Other Decks - Amazon S3s3.amazonaws.com/JuJaMa.UserContent/84c396d5-f455... · CPICH power Predictive performance changes Impacts from all subscribers on