Mobile Video Experience to VMOS 4.0 Methodology

7/25/2019 Mobile Video Experience to VMOS 4.0 Methodology

1/10

Mobile Video Experience

to

vMOS

4.0 Methodology


2/10

Mobile vMOS Formula

Score

Initial Buffering

Latency

(sLoading)

Excellent

(5)100ms

Good (4) 1s

Fair (3) 3s

Poor (2) 5s

Bad (1) 10s

VideoDefinition

Maximum

Score

sQuality)

Typical

Score

Range*

5K & above 5 3.5~5.0

4K 4.9 2.6~4.8

2K 4.8 2.55~4.7

1080P 4.5 2.4~4.4

720P 4 2.1~3.9

480P 3.6 1.6~3.4

360P 2.8 1.0~2.6

ScoreStalling duration

rate (1min)

St

Excellent (5) 0%

Good (4)5%

Fair (3)10%

Poor (2)15%

Bad (1)

30%

Mobile vMOS = (sQuality, sLoading, sStalling)

sQuality = f(v_res, v_br, v_codec, v_profile)

v_res: 360p, 480p, 720p, 1080p, etc.

v_br: video bitrates (kbps)

v_codec: H.264/H.265 etc

v_profile: codec profile

sLoading = f( init_buf_latency )

Init_buf_latency: the period between cli

the start of play

sStalling = f( stalling_ratio )

Stalling_ratio: stalling duration / video p


3/10

Video Coverage: 3 Steps for Video-Centric Network Plan

Service insight and

vMOS target setting1 3Network

solution2Gap identification and

root cause analysis

Video Insight

vMOS Evaluation & Target

50*50 Grid Visualization

vMOS Issue Demarcation

vMOS GAP Identification

Root Cause Analysis

Feature En

Carrier/Sec

New Site A

vMOS = f (sQuality, sLoading, sStalling)

vMOS

Throughput

Latenc

y

Stalling

1080p

2K

720p

Fair@720P Good @1K Excellent @2K

vMOS 3

vMOS 3.5

vMOS 4.0


4/10

Step 1: Video Traffic and Application Insight

Video Traffic Distribution

Video Traffic(MB)100

0%

20%

40%

60%

Video Application Usage Distribution

Video Traffic

Percent (%)

28.60

%

71.40

%

Video

Other

Video Traffic Percent (%)


5/10

240P 360P 480P 720P 1080P1440P

Step1: Example of Target Setting

Traffic % per definition

0% 50% 100%

[1,2.8]

(2.8,3.2]

(3.2,3.6]

(3.6,4]

(4,4.5]

108

720

1 2

3

Analyze video consumption habits

VoD heat map

Experience map

Definition map

Current vMOS distributio

Set 1080p vMOS=3.6 95%

as the target

0% 50% 1

(4.0,4.2]

(3.6,4.0]

(3.0,3.6]

10

2K


6/10

Step2: Video Problem Demarcation Principle

Slow start delay

RTT

Linear buffer delay

speed

FixedUncontroll

able Controllable

Controllable

Delay

Y

Delay

X

Buffer Data BSZ

Delay

Z

APP

prepare

delay

500ms

Initial Buffer

Start Success Ratio Mapping RTT&Speed

Play stall times Mapping Speed

Initial Buffer Component

Slow start

buffer data

B_inti

Initia

0.00

0.01

RTT

Initial Buffer vs. Air Interface

0

2

4

6

8

10

0 50 100 150

34.7ms

Initial

Buffer(s)

Initial Buffer- RTT

Relationship

If initial buffer delay < 3 seconds, RTT(Air Inte

34.7ms.

For low vMOS , If RTT > 34.7ms, RAN side

Otherwise low vMOS is due to Non-RAN side p

Typ

1080

Stal

Initia

Air I


7/10

Step 2: vMOS GAP Finding and Root Cause Anal

GAP identification by 50*50m grid

Low vMOS Area A:

Target vMOS 3.5

Actual vMOS 2

70% grid less than target

Low vMOS Area B:

Target vMOS 3.8

Actual vMOS 3


wireless resource.

Low vMOS Area C:

Target vMOS 4.2

Actual vMOS 2.8


number.

[4, 5)

[3, 4)

[2, 3)[1, 2)

< 1

coverage related

capacity related

users distribution related

vMOS Grid Number Grid Ratio


8/10

Step3 : Network Planning and Solution

OriginalvMOS InsightFinalAf

Features

Enhancement

Multi-sector

Multi-Carrier

Macro site

Micro site

vMOS achi

Convergence

Carrier

Macro

Micro

Prioritized

Rolling Planning

vMOS: 4.8


9/10

Summary

New standard of video experience evaluation

MethodologyResearch

Standardization Industrialization

E2E Mobile Video Solution lift video experience to vMOS 4.0

Wide-band 0 Waiting 0 Stalling Smart and Open

Video Coverage: 3 Steps for Video-Centric Network Planning

Service insight GAP Finding Network planning


10/10

Mobile Video Experience to VMOS 4.0 Methodology

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