smallcells enterprise metrorural

8/11/2019 Smallcells Enterprise Metrorural

1/13

Small Cells:Enterprise, Metro & Rura

Femtocells for 3G

Mindspeed TechnologiesMobile World Congress

Feb 27 - March 1, 2012


2/13

Enterprise and Metro 3G Small Cells

Requirements for Enterprise and Metro 3G Baseband

Stable PHY

RX Diversity Support (uplink user count)

MIMO/Dual Carrier Support

Multiple SKUs supported off of common SW and minimum PCB variants

SmartSignaling

Wide cell radius for rural applications (3km)

High mobility for rural and metro (120km/h)

Soft Handover support

Required for outdoor cells

Best customer experience for indoor

Wide range of user counts

Low cost and low power


3/13

Small Cell Platform: Femtocell EconomicsServes wide range of applications

UserCount

8 users

PC3024

PC3008

PC3032

SOHO

Enterprise

Metro

Ru

16-24 users

64 users

32 u

PC3064

Enterprise Femtocell Public Space PicocellResidential Femtocell


4/13

PC30xx Low Cost Femto ProductsSingle PCB, Single SW load

PC3008Next Generation Femto

8-usersRX Diversity

13-20dBm

PC3016Small Office Femto

16 Users2TX + RX Diversity

20dBm

PC3008Residential Femto

8-usersSISO

13-20dBm

PC3016Small Office Femto

16 UsersRX Diversity

20dBm

PC30xx

Low Cost

User Count

Per

formance

PC303Metr

32 UseLABS

2TX + RX Di24dBm

PC3024Enterprise24-users

2TX + RX Diversity24dBm

PC30xx

HighPerformance

One PCB, 4 product SKUs

One PCB, 2 product S


5/13

smartSignaling Benefits

Reduced Signaling Traffic in the Network

Higher Effective User Count

Improved UE Battery Life


6/13

smartSignaling Reduced Signaling

Before smartSignaling

- UEs cycle between Idle and cell_DCH states to save power

- Connection is created and torn down for each transition

Idle

Mode

cell_DCH

cell_FACH

cell_PCH/

URA_PCH

DataInactivity

Data

Inactivity

Large Data

Exchange

Date/Control

To be Sent

Small DataExchange

RRCConnection

Request

RRC

ConnectionRelease

15-20

messages tothe network


7/13

smartSignaling Reduced Signaling Load

Enhanced cell_FACH

New states supported in the UE

- Cell_FACH/cell_PCH/URA_PCH

- UE connection state is maintained

- Less messaging traffic asconnection is not torn down

- Data transmission still occurs usingcommon channels

RACH/FACH (low speed UL/DL)

Common E-DCH (high speed UL)

HSPDA is shared (high speed DL)

Idle

Mode

cell_DCH

cell_FACH

cell_PCH/

URA_PCH

Data

Inactivity

Data

Inactivity

Large Data

Exchange

Date/Control

To be Sent

RRC

ConnectionRequest

RRC

Connection

Release

cell_DCH


8/13

smartSignaling Higher Effective User Count

Dedicated channels are not used tomaintain connection

Data users not limited by dedicatedchannel capacity

- Traditional user count

Limited instead by RACH/FACHcapacity, common channel capacity

Results in 100s of users being

supported

cell_DCH

100s of UEs


9/13

smartSignaling Improved UE battery life

Enhanced cell_FACH states uselower power on PA

Much improved battery life

compared to connections withdedicated channels

cell_DCH

Idle

Mode

cell_DCH

cell_FACH

cell_PCH/

URA_PCH

Data

Inactivity

Data

Inactivity

Large Data

Exchange

Date/Control

To be Sent

RRC

ConnectionRequest

RRC

Connection

Release


10/13

Rx Diversity

Two antennas with maximal ratio combining

- Improved performance relative to simple antenna switching

No loss of user/channel capacity

Improves reception and uplink performance

Improves pole capacity of the UE

- Vital in order to support capacity much above 8 users


11/13

DCDual Cell/Dual Carrier

What is Dual Cell or Dual Carrier?- Use of 2 adjacent 5 MHz channels in DL and/or UL (release 8)

- Non-adjacent channels (Release 9)

Why- Better data rates where radio conditions dont favour MIMO

MIMO requires good channel conditions and low correlation betweantennas

- Scheduling gains improve user experience Throughput

Latency Cell balancing

- Better capacity than with separate NodeB implementation

- Better throughput and capacity than MIMO

- Macrocell parity

- UE categories 21-24 required


12/13

PC3032 Public Network / Picocell

Local Area Basestation defined class in 3GPP -- Picocell- High data rates and user capacity

- Maximum Tx power 24 dBm- 120 km/h UE mobility

PC3032M enables a Picocell- 32 users

- TX MIMO or Dual Carrier

- RX Diversity

- Soft Handover

- Metro / City centre

- Rural

Femtocell Economics- SoC Baseband

- Multiple RF Providers


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Soft-Handover Solves Problems in the Enterprise/Met

In Soft Handover overlapping

Communicate simultaneouslyDL signal is summed at UE. S

Case which reduces UE UL in

Without Soft Handover calls c

get dropped

Enterprise Femtocells must suSoft Handover to work effectiv

dense deployments

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