eficiencia espectral 3g-2g tef ec

1 © Nokia Solutions and Networks 2013

WCDMA 1900 DC Frequency Refarming


Continue

optimization

GSM,WCDMA

multilayer

optimization

Deploy

WCDMA 1900

network

GSM

Optimization

WCDMA/HSPA Frequency Refarming deployment phases

GSM,WCDMA

Network

assessments

Strategy

definition for

GSM refarming

NetAct Optimizer has proven to be a vital tool when refarming frequencies from GSM to WCDMA

WCDMA1900 4.2 - 3.8

MHz filter Unique GSM features WCDMA SW features

3GPP specification- 5.0 Mhz Nokia Siemens Networks solution

3.8 MHz 3.8 MHz

GSM/ EDGE

WCDMA/ HSPA

•Dual band & optimized

load balancing features

•High performance 6

sector site solution

•OSC

•SRA

•Precise Paging


Nokia Siemens Networks GSM - WCDMA Refarming Solution Maximal spectral efficiency with highest performance

Configurable WCDMA carrier bandwidth

• Selectable WCDMA/HSPA uplink bandwidth

• 4.2 MHz, 4.0 MHz or 3.8 MHz (RU40)

• Selectable WCDMA/HSPA downlink bandwidth

• 4.8 MHz, 4.6 MHz (RU40)

• DC- HSPA carrier bandwidth can be individually selected by 4.2, 4.0 or 3.8 MHz

• Carrier spacing (WCDMA 850/1900, 2 carrier operation)

• 4.6, 4.2MHz (RU20-RU30); 4.0 or 3.8 MHz (RU40)

Liquid Radio GSM SW suite

• Market leading GSM efficiency features e.g. OSC, SRA, Precise Paging

• Voice, data and signaling capacity is increased and spectrum is freed up for

WCDMA or LTE refarming or for more GSM traffic

• Up to/typically 30% more TRX, 90% more cell capacity, …

• Utilizing Flexi Multiradio BTS for the most compact site solutions


Benefits:

• Peak rate increased to 42Mbps

• Up to 20% capacity gain

• Up to 100% average user throughput gain in low loaded

networks with bursty traffic

Dual-Cell: HSPA+ performance more than doubled

• Transmission on two parallel carriers to single UE

• Joint scheduling over the two carriers brings capacity benefits over separate single carriers

• Dual-Cell HSPA+ is specified in 3GPP Rel.8

Uplink Downlink Nokia Siemens Networks:

• 41 Dual-Cell HSPA+ commercial networks, 6 in deployment

• Over 50% of DC-HSPA+ customers


Dual Cell HSPA+ refarming in RU30

5.0 MHz

Traditional Dual Cell Refarming

5.0 MHz

5.0 MHz

UL carrier bandwidth

Nokia Siemens Networks Dual-Cell Refarming

4.6- 4.2- MHz

4.2 MHz 4.2 MHz


Min. carrier spacing


• Traditional WCDMA refarming

with UL 5.0 MHz Carrier

Bandwidth

• 0 GSM channels within 10Mhz

NSN refarming

• 4.2MHz UL BW

• 4.2MHz carrier spacing

• 6 additional TCH channels and

2 BCH channels within 10Mhz


Dual Cell HSPA+ refarming in RU40

Traditional DC-HSPA refarming

NSN Configurable carrier bandwidth DC-HSPA refarming

• DC-HSPA + refarming in 7.6

MHz bandwidth – 2.4MHz of

additional GSM spectrum

5.0 MHz 5.0 MHz

5.0 MHz

4.6-4.2-3.8 MHz

4.2 or 3.8 MHz 4.2- or 3.8 MHz





• UL filtering 3.8MHz

• DL carrier spacing 3.8-5.0Mhz

• Variable DL filtering

• Enables 12 additional GSM

carriers compared to standard

5MHz refarming


Field Results with 3.8 MHz Carrier Spacing in DC-HSDPA

WCDMA WCDMA

3.8 MHz

7.8-8.2 MHz

DC-HSDPA gives 30+

Mbps

DC-HSDPA field

measurements

Unique NSN Flexi BTS

filtering solution


UMTS850

UMTS1900

• Load

• Signal level

• Services

• Terminal capability

Multiband Load Balancing

• Traffic can be steered between U850 and U1900 for balancing the loading and taking full benefit of the two bands togethers

Traffic steering over multiple frequency bands


2G Feature Gains


Orthogonal Sub Channel Introduction

RG20 introduces Orthogonal Sub-channel (OSC) feature: Double Half Rate (DHR) Multiplexes 4 AMR-HR calls into one time slots

Only requires SAIC terminals – penetration in today’s networks 60-80%

No need to wait for VAMOS terminals

OSC increases hardware efficiency Increases TRX voice capacity

Increases capacity for PS services

Reduces call blocking

Frees spectrum for refarming

improved energy efficiency

AMR HR OSC-HR

2 users per TSL 4 users per TSL

OSC0

Half Rate voice codec Dual Half Rate voice codes

De/Multiplexing

OSC1

AMR HR OSC-HR

2 users per TSL 4 users per TSL

OSC0

Half Rate voice codec Dual Half Rate voice codes

De/Multiplexing

OSC1


• Peak hour average OSC gain 15-39%, with peaks of 61%

• SAIC penetration between 50% and 70%

• OSC busy hour average call share - KPI

OSC DHR Results – Telefonica Chile

Sites with at least

4TRX per sector


Extended CCCH Up to 4 times more smart device users

Applications send frequent data messages

Up to 4 times more smart device users with extended CCCH

Improve paging success and make call establishment faster

Paging deletions

Paging attempts

Voice and data call set up failures increasing

Paging deletions increasing when CCCH channels are getting full

Avoid deterioration of voice service quality, case example: eCCCH reduced the paging

deletions from 5.8M to 40k !

Paging deletions

Weekdays


E-CCCH Results – Telefonica Peru

No se observa mayor problema de PAGING_DELETES, salvo unos picos,

pero son problemas puntuales en algunas BTS.


Smart Resource Adaptation - Application Software - in brief

• Conventionally, radio

resources are allocated by

mobile device multi-slot

class

• Today, most of the

transferred packets are

small. Multi-slot allocation is

not efficient way

• With SRA feature, PCU2

performs shallow packet

inspection to allocate only

one timeslot for small

packets

• For large packets, allocation

is according to multi-slot

class as before

• Up to five times more

users

• Fewer resources needed

for <250B packets

• Less territory resources

needed

• Reduced multi-slot (hard)

blocking

• Fewer CS voice

resources needed

• Increased throughput for

multi-slot users

• Fewer PS resources

needed for paging

attempts and RAU/LAU

updates

Resources allocated by need

Resources allocated by multi slot class

= resources needed in one data call

1 user reserves 5 resources

Smart Resource Adaptation BSS402059

Needs-based resource allocation with shallow packet inspection

1 user, 1 resource

RG10


SRA.- Smart Resource Adaptation


Paging Co-ordination Receive voice calls during data calls

Share of packet data calls is increasing

Increasing number of voice calls are missed

Activate Paging coordination with BSC

4 missed calls

You have 2 messages

During data call no voice call

Missed voice call

Data call suspended during voice call Share of paging for packet data

0%

20%

40%

60%

80%

100%

Cell1Cell4

Cell7

Cell10

Cell13

Cell16

Cell19

Cell22

Cell25

Cell28

Paging for

Voice Calls

Paging for

Packet Data

Share of paging for packet data

Already available with RG10 and PCU2

With NOM II

RG10


Paging Coordination in BSC – field results operator A

Reduction of Delete Paging Command confirms positive impact on Paging Success Rate

Feature activation


Precise Paging application software - in brief

• Network alerts the Mobile Station (MS) for incoming voice, data calls and SMS by paging all the cells

• Conventionally, CCCH signaling channels are added if there are enough frequencies

• Precise Paging feature sends paging only to the cell where MS was last known and also to adjacent

cells

• Reduces the paging load up to 70% in both Air and Abis interfaces

• Fewer paging deletions, avoidance of LA and RA downsizing, better customer perceived quality

LAC1

MS

MSC

SGSN

Paging

Abis/LAPD

BSC

Examples

• Very high number

of cells in LA/RA

• MS is stationary

• Smart devices with

high number of

transactions

• Limited spectrum

• GSM frequency

re-farming

Paging

Paging

RG20EP1


Results field trial Peru


THANK YOU!

eficiencia espectral 3g-2g tef ec

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