day 1-t3-1450 zhu-xiaodong-20120523

中文标题字体: 黑体

字号：35-47pt 色彩：主题蓝色

中文副标题字体：华文细黑字号：24-28pt

色彩：反白

Indoor coverage – The key to

handle mobile data traffic explosion

秘密 Proprietary Confidential▲


字号：30-32pt 色彩：蓝色中文副标题

字体：华文细黑字号：20-22pt

色彩：白色

Agenda

Indoor Coverage Solutions of Typical Scenarios

Analysis of Indoor Networking Key Considerations

Summary

Theme1

Theme2

Theme3

Theme4




色彩：黑色子目录(2-5级) 字体：华文细黑

字号：18pt 色彩：黑色

Exponential growth in mobile data traffic is one

key reason for spectrum crunch concerns

Growth in Mobile Data volumes from 2007 to 2010 (2007 = 100)

Source: Statistics published by National Regulatory Authorities

But does this traffic growth reflect the real needs of spectrum ?

3

Theme1

Theme2

Theme3

Theme4






Spectrum bottleneck is for busy cell , busy hours

Bu

sy H

ou

r

~7% of the total

traffic in a day

Data traffic distribution during 24 hours (Mobile devices)

•The VERY high dense areas usually benefit from bespoken RAN deployment

•Suburban and rural area 3G traffic growth is higher than high dense

areas

•Because people use mobile internet more often , busy hour traffic growth

is slower that non busy hour .

Theme1

Theme2

Theme3

Theme4






A typical mobile voice/data traffic day in Europe

5

00:00 10:00 12:00 22:00 17:00

Illustration

6:00 8:00

voice data

@Work @Home On the

Go @Home

On the

Go

Source : T-Mobile Dr. Kim Kyllesbech Larsen

Theme1

Theme2

Theme3

Theme4






Indoor coverage needs to be improved

80% traffic consumed

indoor

10-25dB indoor

penetration loss

V.S

Waste Energy

/ Low throughput

Indoor coverage is more important than ever !

Source: Cisco IBSG Connected Life Market Watch, 2011

Theme1

Theme2

Theme3

Theme4






Typical Indoor Coverage Scenarios

Hotel Commercial Mansion Scenic Spot Stadium Shopping Mall Airport

Tunnel Residential Area Parking Lot Villa Family Coffee Bar

Diversified Scenarios Need Different Solution

Theme1

Theme2

Theme3

Theme4






4 typical indoor coverage solutions

Indoor DAS

Cover higher floors From outside

Femto/Pico

Outdoor DAS





色彩：白色

Agenda


Analysis of Indoor Coverage Key Considerations

Summary

Theme1

Theme2

Theme3

Theme4






Indoor DAS

LTE reusing DAS with other system

LTE BBU GPS)

Splitter

TDL RRU

Antenna

Antenna

Antenna

Splitter

New built DAS

2G BTS 3G BTS

Combiner BDA

Coupler

Coupler

BDA

Coupler

Splitter

Splitter

Splitter

Splitter

Antenna

LTE BBU

LTE RRU

LTERRU

Theme1

Theme2

Theme3

Theme4






Key Considerations for Reusing Indoor DAS

Key Considerations for Reusing DAS

Output Power Matching

Service throughput match

Component Matching

Antenna

Power splitter / coupler

Feeder

Combiner

Inter-system Interference

2.3G and WiFi

2.6G FDD and 2.6G TDD Modify RB or power of cell-edge users to

match throughput requirement

LTE 2G/3G

Theme1

Theme2

Theme3

Theme4






TD-LTE BBU

TD-LTERRU

TD-LTERRU

Splitter

splitter

Floor 1

Floor 2

Floor 3

Floor 4

splitter

fiber

feeder

splitter

feeder

coupler coupler coupler


Vertical-polarized antenna Two single-polarized antennas

Antenna distance should be

larger than 3 wavelengths in

weak correlation area , 10

wavelengths in strong

correlation area

1 dual-polarized antenna

Channel correlation

between 2 paths of dual-

polarized antenna is similar as

two single-polarized antennas

with the distance of 4

wavelengths

Indoor DAS MIMO

TD-LTE BBU

TD-LTERRU

TD-LTERRU

splitter

splitter

Floor 1

Floor 2

Floor 3

Floor 4

fiber

feeder

splitter

feeder



Dual-polarized antenna

splitter

Theme1

Theme2

Theme3

Theme4






Cover Higher Floors from Outside

13

Width(m)

Flo

or(

#)

5 10 15 20 25

-30

-25

-20

-15

-10

-5

-4

-2

0

2

4

6

8

10

12

14

Width(m)

Flo

or(

#)

RSRP（ dBm）

5 10 15 20 25

-24

-22

-20

-18

-16

-14

-12

-10

-8

-6

-4

-150

-140

-130

-120

-110

-100

-90

-80

-70

-60

-50

-120 -110 -100 -90 -80 -70 -60 -500

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

RSRP（ dBm）

CD

F

RSRP CDF曲线

1-1

1-2

1-3

2-1

2-2

2-3

3-1

3-2

3-3

Simulation Condition: Antenna height: 30m, Distance between antenna and target building: 100m, Transmit power : 49dBm, vertical lobe angle: 26°, uptilt angle: 5°

Simulation Result: It can meet the coverage requirement of 4-25 floors, with coverage ratio 95%

Theme1

Theme2

Theme3

Theme4






Outdoor DAS

花坛

广场

投诉用户家所在楼

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元 3单

元 2单元 1单

元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

4单元

3单元

2单元

1单元

3单元

2单元

1单元

正

门

正

门

3单元

2单元

1单元

3单元

2单元

1单元

楼高9层，有三部电梯

楼高9层，有三部电梯

楼高9层，有四部电梯

楼高9层，有四部电梯

2、3单元楼高9层，1单

元楼高6层,有两部电梯

楼高6层楼高6层

楼高6层

楼高6层

楼高6层

楼高6层

楼高6层


楼高6层

楼高6层

楼高6层

楼高6层

楼高6层

楼高6层

楼高6层





楼高6层



楼高

6层

1

2

3

8

15m30m

20m 20m 5m5m

30m

20m

50m

20m

20m15m5m

50m

20m

15m30m

20m 20m 5m5m

20m

20m

80m

30m

30m

30m

30m

15m 30m

30m

15m

20m

40m

40m

20m

20m

20m

40m

40m

30m

30m

30m

30m

15m

40m

40m

20m

20m

20m

5m

15m

30m

30m

50m

20m

20m

20m

5m

15m

20m

30m

40m

40m

9

号

楼

10

号

楼

8

号

楼

7

号

楼

6

号

楼

5

号

楼

4

号

楼

3

号

楼

2

号

楼

1

号

楼11

号

楼

12

号

楼

13

号

楼

14

号

楼

15

号

楼

16

号

楼

17

号

楼18

号

楼

19

号

楼

20

号

楼

路灯装饰天线注：带颜色部分为一期工

程，其中黄色部分已覆盖

30m

15m 30m

30m

Outdoor DAS solution, to realize deep coverage in residential area

Advantage: besides Macro, provide additional coverage and capacity.

Disadvantage: need construction in the residential area, may attract residents’

resentment.

Theme1

Theme2

Theme3

Theme4






Cover opposite buildings, +45°up tilt BBU

RRU

RRU

RRU

RRU

Indoor

Coverage

Road Coverage

Main Street Coverage, 30° down tilt

Cover opposite buildings by wide horizontal beam, Horizontal antenna

Street Coverage, Low Ant

CRAN use one BBU pool for different purpose RRUs ,

cover indoor , street , opposite buildings , etc.

With Collaboration , interference can be greatly reduced

C-RAN for 3D indoor/Outdoor coverage

15

Theme1

Theme2

Theme3

Theme4






Outdoor/Indoor Frequency Reuse Tests:

The blue area is free of outdoor interference with good isolation, while the red area is suffering from interference;

70% area in deep buildings can reuse outdoor frequency freely.

B1F

13F

4F

8F

19F

1F

Outdoor/Indoor Frequency Planning

1F

2F

Deep indoor buildings

Spots by windows

Theme1

Theme2

Theme3

Theme4






Two Frequency Planning methods

Clear area with good isolation: - Fully reuse outdoor frequency f1

Victim area with outdoor interference: - Use reserved indoor frequency f2

Stage 1: Inter-frequency networking

Stage 2: Co-frequency networking

Victim area with outdoor interference: - Use partially outdoor frequency f2

Clear area with good isolation: - Fully reuse outdoor frequency f1+f2

With Collaboration between indoor and outdoor , frequency can be fully utilized

Theme1

Theme2

Theme3

Theme4






Indoor Small Cell is the ultimate way to solve the

indoor coverage issue

Small Cell

Outdoor Indoor

Small

Enterprise Home Public Indoor

Types Pico/Micro Femto Femto

key point Easy installation Business model Business model

Installed by Operator Customer Customer

Business model is the key of deploying indoor small cell





色彩：白色

Agenda


Analysis of Indoor Coverage Key Considerations

Summary

Theme1

Theme2

Theme3

Theme4






Summary

Indoor coverage is the key to handle mobile data traffic explosion .

Indoor DAS , Outdoor DAS , Cover from outside and Small Cell are four major

method to provide good indoor coverage .

C-RAN for 3D indoor/outdoor coverage and Small Cell are future provide solution .

day 1-t3-1450 zhu-xiaodong-20120523

Business

deep coverage

additional coverage

coverage requirement

coverage ratio

f deep indoor buildings

das lte

tiltrru street coverage

g traffic growth