deployment. co-existence with 2g&3g

HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential

Deployment. Co-existence with 2G/3G.


LTE deployment strategy

Urban & Rural- for expanding and mature phases -

Hot spots & Dense urban - for initial phase -

Load sharingService based mobilityEnhance network performance and end user experience

Largely dedicated for PS serviceKeep service continuity via 2G/3G networkNo impact on the stability of 2G/3G network

Enable the seamless co-existence between LTE and 2G/3G systems.


FDD/TDD Convergence solutionTDD-LTE

FDD-LTE FDD/TDD-LTE

FDD/TDD-LTE

Service Network

Femto Cell

Convergence in coverageConvergence in Relay

TDD-LTE

FDD-LTE

TDD-LTE

FDD-LTEFDD-LTE

FDD-LTE

FDD and TDD LTE can relay on each other, to

reduce interference and to improve capacity.

FDD and TDD LTE can relay on each other, to

reduce interference and to improve capacity.

FDD/TDD Hybrid Network is a good choice with easy interference control.

Capacity improvement by full using of FDD/TDD spectrum .

Easy network planning and optimization by FDD/TDD convergence.

FDD/TDD Hybrid Network is a good choice with easy interference control.

Capacity improvement by full using of FDD/TDD spectrum .

Easy network planning and optimization by FDD/TDD convergence.


FDD/TDD Convergence on Technology

FDD/TDD LTE can be developed on the same platform!

(Sharing: 70% Software, 80% Hardware)

FDD/TDD LTE can be developed on the same platform!

(Sharing: 70% Software, 80% Hardware)

eNBeNBUser planeControl plane

NAS

RRC

PDCP

RLC

MAC

PHY

The common Design of FDD/TDD :

Upper-layer signaling including NAS，RRC etc.

Level 2 user plane processing: MAC，RLC，PDCP etc.

70% of L1 specifications are same

The major differences between TDD and FDD are: frame structure, time division, synch., multi-ante., etc.


Huawei unified solution

Efficient deploymentLong term OPEX saving

Uni-OperationCo-OAMCo-RNP/RNO

Uni-EquipmentUni-BTS/(e)NodeBCo-CabinetCo-Antenna feeder

Uni-SiteCo-TransmissionCo-Auxiliary facilities

Long term viability

One NetworkMaximized TCO savings

One Deployment One TeamOptimized workforces

Flexible EvolutionMulti-mode common platformHardware sharing

TCO Saving Performance Improving

Optimized 2G/3G/LTE cooperationEfficient resource allocation

Unified solution for all 2G, 3G and TDD/FDD LTE!


Content

3. Deployment. Co-existence with 2G/3G.

3.1 LTE: from and with 2G


From 2G to LTE helped by SingleRAN.

Realize a smooth GSM, UMTS, LTE

migration/co-existence in a distributed manner.


migration/co-existence on same footprint, with stackable design.

G/U/L in one Unified platform design.


General idea for GSM/LTE interference solution

Interference between 2G and LTE, brief.

A good network planning can minimize the risk of interference.Different frequency band interference solutionAdd guard band between two systemsAdd band-reject filtersIncrease isolation of antennas

Same band but adjacent frequencySite location as close as possible, co-site is betterAdd guard band between two systems

Same band and frequencyAdd space isolation.

GSM

LTE


Interference: 2G vs. LTEGeneral idea for GSM/LTE interference solution

Interference of GSM/LTE in the same frequencyWhen GSM and LTE share same band and same frequency , GSM and LTE will

Interfere each other. So space isolation is required in network planning.

The inside seven cells are GSM. The middle cells are guard cells. The outside cells are LTE. The numbers of guard cells should be calculated.

Interference can be divided into:LTE base station interferes GSM UELTE UE interferes GSM base stationGSM base station interferes LTE UEGSM UE interferes LTE base station

Interference of non co-site in the same band, different frequency.In case of non co-site, if the terminal is just near the location of the other system’s

base station, the interference is the strongest. Usually we take receiver’s noise increased 3db by interference as a criterion. The

coverage of the network will shrink because of increase of receiver’s noise.

GSM

LTE

GSM

LTE

Interference of co-site in the same band, different frequencyInterference will increase the power of receiver’s noise, which will reduce the network’s

capacity and coverageIn the case of co-site, when power of interference is 10dB less than power of thermal

noise, then the power of receiver noise will increase 0.4dB. It leads to shrinkage of the network coverage.

GSM&LTE

LTE

Clear


Content





From 3G to LTE helped by SingleRAN.


migration/co-existence in a distributed manner.


migration/co-existence on same footprint, with stackable design.

G/U/L in one Unified platform design.


General idea for UMTS/LTE interference solution

Interference between 3G and LTE, brief.

A good network planning can minimize the risk of interference.Different frequency band interference solutionAdd guard band between two systemsAdd band-reject filtersIncrease isolation of antennas

Same band but adjacent frequencySite location as close as possible, co-site is betterAdd guard band between two systems

Same band and frequencyAdd space isolation.

UMTS

LTE


eRAN: interworking with RAN

• Interworking with UMTS:Coverage-based for PS continuity for now, load-based for PS and coverage based for CS later, and service-based camping & HO to be the main strategy for both CS and PS when mature.PS: PS Service Mobility.CS: CS Fall Back, IMS based SR-VCC.

Keep service continuity via 3G while avoiding to impact the 3G network stability.When mature, service based mobility is the choice.

LTEUMTS


Mobility management: interworkingWhen you move through multi radio access networks…

eUTRAN Freq.1

eUTRAN Freq.2

Other RAT: UTRAN / GSM / CDMA2000

Intra-frequency handover

Inter-frequency handover

Inter-RAT handover

Minimum impact on legacy networkMinimum handover on legacy networkOptimal experience among multi-networks

Avoid upgrade frequently for legacy networksGuarantee service continuityFast LTE networks deployment

principles

Handover within system is preferredLocated in LTE coverage with high priorityLTE to UMTS cell reselection supportedLTE to UMTS PS handover based on coverage supported

BenefitsFeatures


PS Service Mobility

eRAN: interworking solution 1

Initial phase of LTE deploymentthe LTE UE is only USB modem

LTE only support data service.

3G3G3G3G3G3G

LTELTELTELTE

3G3G

PS HandoverCell Reselection

ConsPros

SolutionLTE has highest priority when UE attaches.

Support LTE<->3G cell reselection

LTE -> 3G PS handover based on coverage

Fast LTE deployment Does not support voice services


CSFB (CS Fall Back)


Initial phase of LTE deploymentLTE only support data service without IMS.Voice call is Fall back to 3G.

3G3G3G3G

LTELTE

3G3G

Cell Reselection PS RedirectPS Hanover

CSFBPS Handover

Cell Reselection

ConsPros

Fast LTE deployment3G high priority avoid the delay time

due to CSFB for pure voice service

LTE coverage must be overlapped by 3G coverage.The delay time due to CSFB can not be avoided for

combined service.Need to align TA with LA as much as possible

Solution3G has high priority when UE attaches.Voice call is served by 3G.Data service is redirected to LTE.When there’s data service carried by LTE, Voice call

request is Fallback to 3G with PS handover.Supporting 3G->LTE PS handover


IMS Based solution


Expanding phase of LTE deploymentLTE support Voice and data service with IMS.

3G3G3G3G

LTELTE

3G3G

Cell Reselection PS HandoverSRVCC

Cell Reselection

ConsPros

SolutionLTE has highest priority when UE attaches.Support LTE<->3G cell ReselectionLTE-> 3G PS handover based coverageLTE Voip->3G CS based coverage.

LTE support Voice and data service.Good user experience

Impact by IMS deployment


Content




3.3 EPC: an evolved Core Network, brief.


ePS, overall architecture.GSM, WCDMA and LTE co-exist and inter-work under the same EPC for packet data.

* Regarding CS/voice services, CSFB and IMS based solutions can be deployed.


CN migrating to ePC: Huawei’s idea.

SGSN

Corporate Intranet

Internet

Operator Service Network

GPRS

UMTS

LTE

Non3GPP

MME

HSS PCRF

Serving GW PDN GW GGSN

BTS BSC/PCU

NodeB RNC

S2

S1-U

S6a

S7

S5/8

Gb

Iu

S1-MMES12

S3

S4

S11

SGi

S9

S10

User planeControl plane

Flat and simplified architectureSeparation of control plane and bearerNative IP signaling protocols: Diameter / PMIP / GTPv2Centralized policy and charging controlUnified access for multiple radio access technologies including non 3GPP

Rx

AF e.g CSCF

eNB eNB

eNB

eNB

eNB

X2

SGSN+MME=USN (Unified Serving Node) & GGSN+Gateway=UGW (Unified Gateway).


EPS: SON, a key feature.

Description:• Auto Planning RF and Transport• Auto Deployment and Configuration• Optimization based on PM, FM, etc, to improve

service quality automatically.• Automatic Maintenance

Description:• Auto Planning RF and Transport• Auto Deployment and Configuration• Optimization based on PM, FM, etc, to improve

service quality automatically.• Automatic Maintenance

Benefits:OPEX saving & CAPEX reduction• Easy network deployment and maintenance by

minimized site• Reducing training, no need of multi-platform,

efficient monitor, enhanced fault correlation and trouble shooting

• Coverage & capacity optimization (improve performance without investment)

Persistent improvement by closed loop

• Planning-Optimization-Configuration-Monitoring loop flow

Operator policies based flow control

• Open loop (manual involved) for user understanding and trusting SON

• Closed loop (automatic) for no manual interaction to saving more costs

Benefits:OPEX saving & CAPEX reduction• Easy network deployment and maintenance by

minimized site• Reducing training, no need of multi-platform,

efficient monitor, enhanced fault correlation and trouble shooting

• Coverage & capacity optimization (improve performance without investment)

Persistent improvement by closed loop

• Planning-Optimization-Configuration-Monitoring loop flow

Operator policies based flow control

• Open loop (manual involved) for user understanding and trusting SON

• Closed loop (automatic) for no manual interaction to saving more costs

SON Optimization

Deployment

ConfigurationMaintenance

Planning

Healing

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Copyright©2009 Huawei Technologies Co., Ltd. All Rights Reserved. The information contained in this document is for reference purpose only,

and is subject to change or withdrawal according to specific customer requirements and conditions.

Climbing together

to the top of the mountain!

deployment. co-existence with 2g&3g

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