Centra Presentation

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50 pt

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Software Deployment and Support

Hardware & Software Architecture of LTE RBS

David SmithServices Engineer - ExperiencedLTE / WCDMA RANGSDC AustraliaEricsson Australia

Top right corner for field-mark, customer or partner logotypes. See Best practice for example.

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Text 24 pt

Bullets level 2-520 pt

Ericsson Internal Network & Technology Consulting2

LTE RBS Hardware – Agenda

RBS 6000

LTE RBS top level HW architecture

DUL (Digital Unit LTE) architecture

ULMA / Baseband


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IP transport

CN

OSS LTE RAN

eNode B

NMS

eNode B

eNode B

150 Mbps Downlink &50 Mbps Uplink

In Service PerformanceEqual to GSM/WCDMA from day one! Easy & robust installationand upgrade

Flexible frequency band additions

Product architecture enables Release of HW independentof SW

What - 5 Critical Success Factors

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RBS6000

Power

Data 1

Data 2

RX B1Ant B

Ant A

FRU44

Fault

Operational

Info

RX A1

RX A2

1 sector

DUL

RU


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LTE RBS, products

Indoor

Macro

Outdoor

Macro Large Macro

3 ,4688in

E C bus

XA LM

FC U/DCF

Pow er 2Po wer 1

Faul t

O per

I nfo

DPU

FOI

Ra dio 1Radi o 2Radi o 3Radio 4Radi o 5Ra di o 6 Po werEC -busSit e LANGP SDeb ugOt her DPUTN

DPU

FOI

Ra dio 1Radi o 2Radi o 3Radio 4Radi o 5Ra di o 6 Po werEC -busSit e LANGP SDeb ugOt her DPUTN

18,30in

1.5U Box

Micro/Main Unit

RUL 02

RX A1

RX B1

+ +...

Cabinets and support system•Common for LTE/GSM/WCDMA•Wide product portfolio

•Climate•Power•Site solutions

Digital Unit LTE (DUL)•LTE Unique •CPP common parts with WCDMA DUW• 150/50 Mbps• >2000 users?

Radio Unit LTE (RUL)•Shared with WCDMA •Future: MIMO 2x40 / 2x20 W•Wide product portfolio

•RET•TMA, etc

dTRU box

Adaptionkit


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R1 HW configuration

ASC/ATMA/

RIU

ARET/ERET

ARET/ERET

ASU

ASC/ATMA/

RIU

Feeder sharing with GSM for

example

PSUpower SCU SAU

CPRI

RS-485

TBD

RadioUnit

RadioUnit

RadioUnit

DUL

BFUbattery


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Text 24 pt



ASC/ATMA/

RIU

ARET/ERET

ASU

RadioUnit

ARET/ERET

ASC/ATMA/

RIU

RadioUnit

RadioUnit

R1 HW configuration

Feeder sharing with GSM for

example

PSUpower SCU SAU

CPRI

RS-485

TBD

RadioUnit

ARET/ERET

ASC/ATMA/

RIU

RadioUnit

DUL

ASC/ATMA/

RIU

ARET/ERET

ASU

RadioUnit

BFUbattery


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1 DUL is enough

DUL20: – 172 Mbps DL + 56 Mbps UL– 2000 users?

Shared between up to 6 sectors, on ms level As few hard limitations as possible!

2 DUL20 when need for redundancy

DUL30 when need for 4xMIMO @20M, or for extreme sites.


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Digital HW Radio HWMPE HW ControlAlarms CPRI

PowerClimateCabinets

Control processingBase bandTransport network

Radio UnitTower mounted eq.Feeder sharing

To other Digital HW, e.g. WCDMA RBS

To other Digital HW, e.g. WCDMA RBS

Drivers: Models, Indoor/OutdoorCommon with

WCDMA

Drivers: Bit rate, Capacity, RAN Features

LTE specific

Drivers: Frequency,Remote/Local, Output power

Common with WCDMA


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Digital HW, functional mapping

GTP-U switchingIPSEC termination

NPU

Radio Network functionsUE functionsConfiguration&ManagementRBS file system

MP

UserplaneUserplane Control

BB moduleSwitch CPRIPHY (OPTO)

CPRIInternaltransport

Radio oscillatorTime generator

Synch

GbE, Power,GPS, LCT

I/FNPU: Network Processor UnitMP: Main ProcessorCPRI: Common Public Radio IF

O&M

S1/X2 ”Uu”

Node control: Equipment Control & Internal platform

User plane control: BB

User Plane: BB & Radio

RAN Application


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DUL HW interfaces

GTP-U switchingIPSEC termination

NPU

Radio Network functionsUE functionsConfiguration&ManagementRBS file system

MP

UserplaneUserplane Control

BB moduleSwitch CPRIPHY (OPTO)

CPRIEthernetSwitch

Radio oscillatorTime generator

Synch

GbE, Power,GPS, LCT

I/FNPU: Network Processor UnitMP: Main ProcessorCPRI: Common Public Radio IF

O&M

S1/X2 ”Uu”




RAN Application

sRIOBPI

GbEGbEGbE xIO


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L1

O&MG

TPU

RadioS1/X2 ”Uu”

RN ManagementUE Handling




RAN Application

SCH LA

System overview

MPE

MPE

PDCP RLC MACHARQ


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FILTER

80 x 40

sRIO3.3V1.2V

FCI

FCI

PRIMARY CONVERTER

55 x 40

1,0 V

3,3

V

1,8

V

1,2

V

2,5 V

LX110T3.3V2.5V1.8V1.2V1.0V

DC/DCSEQUEN

CE30 x30

28 V1,

05 V

DD

R2

ULM

A03.

3V1.

8V1.

05VD

DR

2

DCDC

4x LDO

MG

T

DD

R2

ULM

A13.

3V1.

8V1.

05VD

DR

2

DD

R2

ULM

A23.

3V1.

8V1.

05VD

DR

2

DD

R2

ULM

A33.

3V1.

8V1.

05VD

DR

2

1,05

V

1,05

V

1,05

V

VCXO loopfil

ter

DC

LAN

TEST

ECGPS

SPAR

E

DC

LAN

TEST

ECGPS

SPAR

E

LEDLED

Nex

us J

TAG

RW

JTA

G6V

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

TUMOSC

25x25

TUMOSC

25x25

TUM

logi

c

GPPQ3

29x29

GPPQ3

29x29

DDR

2

DDR

2

DDR

2

FLAS

HD

DR2

NPU39x39NPU

39x39

DDR

2

DDR

2

DDR

2

Pri+secEth phy

RGMII/SGMII

Sec magn. 25x12 mm

RESET22x12

UARTPhy 15x12 LAN

phyLANmag

ETHSWITCH

35x35

ETHSWITCH

35x35Flashdisc

20x22

FPGA19x19FPGA19x19

TUF3.3V2.5V1.8V

DUL step 2 & 3 : Control of BB

MP

SYNCH

X

NPU

O&M

S1/X2 ”Uu”




RAN Application

NPU

MP

BBmodule CPRIX

Synch

I/F

UL

Base Band Module

CPRI


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Restart Domains

ULMA+

NWPPHY

CPU RAM CPU CPU

RAM

DUL

Eth.

X

RAM

RAM

CPU CPU

RAM

ULMA+ RAM

ULMA+ RAM

ULMA+ RAM

MP

NWP

BB BB


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Text 24 pt



FILTER

80 x 40

sRIO3.3V1.2V

FCI

FCI

PRIMARY CONVERTER

55 x 40

1,0 V

3,3

V

1,8

V

1,2

V

2,5 V

LX110T3.3V2.5V1.8V1.2V1.0V

DC/DCSEQUEN

CE30 x30

28 V1,

05 V

DD

R2

ULM

A03.

3V1.

8V1.

05VD

DR

2

DCDC

4x LDO

MG

T

DD

R2

ULM

A13.

3V1.

8V1.

05VD

DR

2

DD

R2

ULM

A23.

3V1.

8V1.

05VD

DR

2

DD

R2

ULM

A33.

3V1.

8V1.

05VD

DR

2

1,05

V

1,05

V

1,05

V

VCXO loopfil

ter

DC

LAN

TEST

ECGPS

SPAR

E

DC

LAN

TEST

ECGPS

SPAR

E

LEDLED

Nex

us J

TAG

RW

JTA

G6V

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

SFP

TUMOSC

25x25

TUMOSC

25x25

TUM

logi

c

GPPQ3

29x29

GPPQ3

29x29

DDR

2

DDR

2

DDR

2

FLAS

HD

DR2

NPU39x39NPU

39x39

DDR

2

DDR

2

DDR

2

Pri+secEth phy

RGMII/SGMII

Sec magn. 25x12 mm

RESET22x12

UARTPhy 15x12 LAN

phyLANmag

ETHSWITCH

35x35

ETHSWITCH

35x35Flashdisc

20x22

FPGA19x19FPGA19x19

TUF3.3V2.5V1.8V

DUL step 2 & 3 : UL flow

MP

SYNCH

X

NPU

O&M

S1/X2 ”Uu”




RAN Application

NPU

MP

BBmodule CPRIX

Synch

I/F

UL

Base Band Module

CPRI


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ULMA5 MbyteMemory

Memory Controller

RAMI/F

DSP DSP DSP

sRIO

sRIODDR

... Acc Acc...xIO

xIO

PPC405

DDR

DDR

IO

BPIetc


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PDCPRLCMACPQ bufHARQ

L1

O&M

GTP

U

RadioS1/X2 ”Uu”

RN ManagementUE Handling




RAN Application

SCH LA

System division

API

MPE

MPE

LTE BB


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BB in LTE Logical Architecture (Layer View) User Plane (UP)

– Receives RRC signalling from RAC– Terminates S1-UP, X2-UP– Processing of L1L2 user-plane of the radio

interface.

User Plane Control (UPC)– Controlling the L1L2 user-plane of the

radio interface and internal HW resources.

RBS Equipment and Resource Control--BB module Control (RERC/BBMC)

– RBS internal transport for User Data and RRC signalling

– Transport for RBS internal configuration signals from RAC to User Plane and User Plane Control

– LoadingCPPCPP

RB

S E

quip

emen

tan

d R

esou

rce

Con

trol (

RE

RC

)

User Plane

RAC

Mgmnt I/F

OSS-RC

User PlaneControl

Baseband


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DPU LTE (1 module BB) Board architecture for LTE (working assumption 25/10-07) Use sRIO for control & BB internal Use xIO for BB internal Use GIC to terminate Ethernet (and route data via xIO)

Ethernet NP

Gb Ethernet

sRIOCPU

ULMA1(DL)

GIC

ULMA1(UL1)

ULMA1(UL2)

sRIO(switch x 5)

= /// ASIC

= FPGA

= SourcedComponent

LTE DPU1 module BB

BPI

xIO

TU

ram ram

ram ram

ram ram

ramflash ramramram

ram

ULMA1(DC + SCH)

ram ram

3-6 x CPRI

CPU

CPU

CPU

CPU

Gb EthSwitch?

WARP3

ramCPU

RadioAnalog

Parts (*)

RadioAnalog

Parts (*)RU

(*) including AD/DA and Mixed ASICs

Baseband module

RI

LTE BB


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LTE RBS Hardware – Summary

RBS 6000


DUL (Digital Unit LTE) architecture

ULMA / Baseband


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How many ULMA modules per DUL?

• Alt 1: 1

• Alt 2: 2

• Alt 3: 4

Survey 1


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LTE Software Structure – Agenda

Blackbox view – external interfaces

Partitioning – subsystems – Operations and Maintenance – RERC / Node Control– Radio Access Control– Baseband – User Plane / User Plane Control


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Black box view

LTE RBSS1/X2 CP(control)S1/X2 UP(user transport)

Uu(Radio)

Mul (O&M)


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Subsystems


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SW Reuse in LTE

RAC

LTE

RNC

Design patterns,Knowhow,Knownot

O&M

CPP

Design rules,Code

MPE

Common Site

Design, Code

RU

Common Radio

Design, CodeNC

WRBS

Design, Knowhow,Knownot

BB

GSM

Design, Code


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Design environments

RAN Application OaM

Baseband Radio Nod

e C

ontro

l

Rose RT/C++ ->RSD RT/C++

C/C++/asm C++

Rose/Java

C++

Test: Erlang


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Text 24 pt



Subsystems

RACueh+rnh

OaM FrameworkOMF

Node CtrlNC

Baseband Mod CtrlBBMC

UE & Radio Network Handling

UEH+RNH

User Plane CtrlUPC

User PlaneUP

Radio

CPP/NCI

Low Hz

High Hz

Radio Access CtrlRAC


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O&M Framework (OMF) 1/2

Access to management data by external actors via Mul Trace & Debug Observability Provide O&M support services:

– Fault Management (FM) – alarms– Configuration Management (CM) – get/set/action/cr/del MO– Performance Management (PM) – events/counters– etc…


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O&M Framework (OMF) 2/2

O&M

Radio Access Control

RBS Equipment and Resource Control

EM

Mul

MOM

CPP

Management Adaptation Layer

Resource Layers

Service Layer

Presentation Layer

CPP Resurce Layer

OSS-RC


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Subsystems

RACueh+rnh

OaM FrameworkOMF

Node CtrlNC



UEH+RNH

User Plane CtrlUPC

User PlaneUP

Radio

CPP/NCI

Low Hz

High Hz



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Radio Access Control 1/2

RAN Application should be Hardware Independent UEH (User Equipment Handling)

– Establishment, maintenance and release of UEs– UE context management

RNH (Radio Network Handling)– Management of cells and cell relations– Admission control

External protocol termination– UEs (Uu interface) – RRC protocol– MMEs (S1 interface) – S1AP– LTE RBSs (X2 interface) – X2AP


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NOAM (O&M)

CentralLM

UeRegister

MmeRegister

RbsRegister

RbsTrace

CPP

Mme

Cell_1

OSE Proxies

O

S

E

P

r

o

x

i

e

s

RrcSigCtxtUeCtxt

MeasCtxt

SecCtxt

BearerCtxt

NwIfCtxt

CtxtHandler

NwIfDTerm

RrcSigDTerm

SCTPI

SCTPFI

TapDispatcher

SCTPAssociation

NwIfCTerm

Endpoint Handler

FRO Handler

Radio Access Control 2/2


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Subsystems

RACueh+rnh

OaM FrameworkOMF

Node CtrlNC



UEH+RNH

User Plane CtrlUPC

User PlaneUP

Radio

CPP/NCI

Low Hz

High Hz



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Text 24 pt



RERC / Node Control 1/1

RBS hardware management– Start up– Configuration– Supervision

Licensing of capacity resources– Throughput– Output power

Provides logical cell & UE resources to RAC layer– Hides hardware from RAC layer so that RAC becomes

independent of hardware capabilities and revisions


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Text 24 pt



Subsystems

RACueh+rnh

OaM FrameworkOMF

Node CtrlNC



UEH+RNH

User Plane CtrlUPC

User PlaneUP

Radio

CPP/NCI

Low Hz

High Hz



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Text 24 pt



User Plane Control 1/3

Managing L1/L2 control plane aspects of the radio interface

– Controlling transmission of data in user plane queues– Scheduling– Link Adaption

Deliver services to application layer– Start/stop measurement gaps– Set up cell context


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UE Level User Plane Control 2/3

Each UE in LTE Active State gets an instance of the classes:

– DlUeCtrl – UlUeCtrl

States and functions handled by these classes:– Measurement gap info– Link adaption– Power control– UE capabilities– Policing– Channel quality estimations– Scheduling weight


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Cell Level User Plane Control 3/3

Coordination/use of air interface on cell basis represented:

– UlCellCtrl / DlCellCtrl Control which resources are used for common

channels and shared channels Allow sending of paging and broadcast messages


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User Plane 1/1

Functions for handling the high bit rate flow Cell level

– Channel coding– MIMO processing– Multiplexing/demultiplexing users onto antenna branches

User level– MAC processing– HARQ retransmission failure detection– RLC ciphering– PDCP header replacement


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White box view (simplified)

S1/X2 CP

S1/X2 UP

Uu

Mul

RadioNPU/EthX

GICBBMCUPC

UPUL

UPUL

UPDL

CPRI

PQ3ULMA

LSIFPGA

cell

bbom

central

supsysC

monitor

nci_gen

nc

noam


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Text 24 pt



Logical Arch HW Deployment

elib

BB Module Ctrl (BBMC)

<Sourced>Node Ctrl (NC)

NCI

Radio

MPE

PHRI

UserPlane Ctrl (UPC)

UlMacCe DlMacCeUlCellCe DlCellCe

UpcMeBbUeMeBbMtdMe

UserPlane (UP)

OaM Framework (OMF)

eNB Feature

PM Mgr

PM Controller

PM Application

BbOmMe

UnitControl

BoardCtrl

CPP

RICM

Inter Node Sign (INS)

S1 CP TermX2 CP Term

RadioNetwork (RNH)CellRegister

RrcCommonCell

Admission

User Equipment (UEH)

MeasCtxt

UeRegister

UeContext RrcSigCtxt

BearerCtxt NwIfCtxtSysInfoDist

22/0363-FCP 103 7306

LPP

MPFPGA

NPUULMA

CPP

NCI

CPRI XEth Term

DL

DlRlcPe

DlRrcCPeDlMacPe

DlL1Pe

DlCellPe

UlRlcPe

UlMacPe

UlL1Pe

UlCellPe

SysConst

HoCtxt

BEM

DlIQTrp UlIQTrp

UpMtdMe

UpMeBbCellMe

CABV

Radio Access Control Layer

RBS Equipment andResource Control (RERC)

Management Adaption Layer

Userplane Control Layer Userplane Layer

Alien

SysLib

LocalCell

Sector

CellEqResH

MpeControl

TpNetwControl

TimDev

RrcDedicated

SecurCtxt

NwIfTermConnCoord

NCell

NCellL3H

MmeHRbsH

BbSchMeBbUnitOmMe

UpcMtdMe

Mao

PM Agent

DlPdcpPe UlPdcpPe


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References

5/1594-FCP 103 7306 – IS Platform and Digital HW 7/0363-FCP 103 7306 – LTE RAN Logical Architecture 1/1594-FCP 103 7306 – Impl. Sketch LTE RBS EAB/FJL-08:0169 – LTE SW Architecture 22/0363-FCP1037306 – LTE SW Architecture


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Summary - What we covered

Blackbox view – external interfaces– UE– MME– Other LTE RBSs

Partitioning – subsystems – Operations and Maintenance / Node Control– Radio Access Control– Baseband – User Plane / User Plane Control


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Text 24 pt



Q&A


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Text 24 pt



Documents

Centra Presentation