Wne RNCengoverview

NORTEL NETWORKS CONFIDENTIAL

Univity RNC Engineering Overview

Florence HolodiukAccess System and Product Engineering11th April 2003 - 03.01

Univity RNC Engineering Overview - 2NORTEL NETWORKS CONFIDENTIAL

Foreword• All informations in these slides refer, if no version is

mentioned, to the UMTS 03 release

• These slides can be updated without notice, they can’t be considered as a reference document.

• Reference documents are – Univity RNC Product Engineering Information

(PEI)– Univity RNC Capacity bulletin

• Latest information about Univity RNC is always available on UMTS WNE RNC Web Page:

http://navigate.us.nortel.com/imds?pg=/eng/wne/umts/utran/rnc


Agenda

• Overview

• Univity RNC Architecture & Hardware description

• Equipment and Link protection

• RNC Dimensioning

• OAM Connectivity

• RNC Synchronization


Overview


UMTS Access Network Architecture

ACCESS NETWORK (UTRAN)

UTRAN: UMTS Terrestrial Radio Access Network

Node B(BTS)

Uu

IubATMBackbone

Iub

RNC

ATMBackbone

Iu (CS & PS)

ATMBackboneIur

Iur

Iu (CS & PS)Node B

(BTS)

Uu

IubATMBackbone

Iub

UE

UE

CORE NETWORK

Preside (OMC-R, MDM, OMC-B)

CORE NETWORK


RNC Types

Node B(BTS)

ATMBackbone

RNC(C-Node & I-Node)

IubOptical STM1

IubElectrical E1

IuOptical STM1

SDH RNC PCM RNC

Iub Electrical E1

Node B(BTS)

C-Node & I-Node

Optical STM1

IuOptical STM1

PCM Access Node(colocalised)

RNC

ATM Backbone


RNC types

• A PCM Access Node is:– 1 PP7K colocalized with 1 CNode & 1 INode– Specific cards (type and number)

• In the following configurations the PP7K is not a PCM AN but is part of the transmission network:– The card configuration doesn’t fit the market model– There is more than 1 PP7K per RNC– There is more than 1 RNC per PP7K– The PP7K isn’t colocalized with the RNC


Radio Ressource Management• controls the radio ressources allocated to the users

– Admission control– Always On– Radio Bearers

• interface management– QoS Management

• UTRAN management– Handover algorithms– AMR control– Power control

RNC Main Functions


RadioNetwork

Layer

TransportNetwork

Layer

Physical Layer

ApplicationProtocol

DataStream(s)

Control Plane User Plane

SignalingBearer(s)

SignalingBearer(s)

DataBearer(s)

ALCAP(s)

Transport NetworkUser Plane

Transport NetworkUser Plane

Transport NetworkControl Plane

RNC interfaces models


RNC control plane protocol stacks

NBAP

PHY

ATM

AAL5

Service Specific Layers

Node B

RANAPRNSAPNBAP

PHY

ATM

AAL5


MTP3-B

SCCP

RANAP

PHY

ATM

AAL5


MTP3-B

SCCP

Core Network (CS Domain)

RANAPRNSAPNBAP

PHY

ATM

AAL5


MTP3-B

SCCP

RNC

RANAP

PHY

ATM

AAL5


MTP3-B

SCCP

Core Network (PS Domain)

RNC


Data Streams Iub

PHY

ATMAAL2

Node B

PHY

ATM

AAL2

PHY

ATM

AAL2

GTP-U

Core Network (CS Domain)

PHY

ATM

AAL2

RNC

Data Streams Iu PS

PHY

ATM

AAL5

Core Network (PS Domain)

RNC

Data Streams Iu CSData

StreamsIub, Iur

DataStreams

Iur

DataStreams

Iu CS

DataStreams

Iu PS

AAL5

IP

UDP

GTP-U

IP

UDP

RNC user plane protocol stacks


RNC Architecture & Hardware description


Univity RNC Product

• Control Node– Based on BSCe3 Control

Node, adapted to fit in a PP15K Bay

• Interface Node– Based on Passport 15K

• PCM Access Node– Optional node to provide

E1 connectivity on Iub at RNC level

– Based on PP7K


RNC Cabinet


RNC Hardware ArchitecturePP 15K Interface Node

PP15K Fabric

CP3OC3/STM1

FPPS FP

OC3/STM1 to Iu, Iub, Iur Ethernet to OA&M

TMU

UMTS

OMUOMU

OAM&P

TMU

UMTS

TMUUMTS

UMTS

TMUUMTS

UMTS

Spareboard

CC1 CC1

Control Node

STM1

Ethernet to OA&M

OMU: Operation and Maintenance Unit

TMU: Traffic Management Unit ( call processing and radio functions)

CC1: ATM Switch and connectivity to Interface Node

16pOC3/STM1: Interface Card

CP3: Control Processor

PS FP: Packet Server Function Processor (high touch bearer processing and User plane functions)

Fabric: Backplane bus


Univity RNC Layout & Cards positioning

• Control Node– 2 OMU – 2 CC1– 4 MMS– 4 to 14 TMU-R

• Interface Node– 2 CP3– 2 16pOC3/STM1– 4 to 12 PS FP

1

TMU

-R

2

Fille

r

3

TMU

-R

4

TMU

-R

5

OM

U6 7

CC

1

8

CC

1

9

OM

U10 11

TM

U-R

12

TMU

-R

13

TMU

-R

14

TMU

-R

15

PS

I-1

3

TMU

-R

4

TMU

-R

5

MM

S

6

MM

S

7

Fille

r

8

Fille

r

9

MM

S

10

MM

S

11

TMU

-R

12

TMU

-R

13

TMU

-R

14

TMU

-R

15

PS

I-0

2

Fille

r

1

TMU

-R

7 P

S_F

P

0 C

P3

1 C

P3

2 P

S_F

P

3 P

S_F

P

4 P

S_F

P

5 P

S_F

P

6 P

S_F

P

15 P

S_F

P

8 O

C3-S

TM1

9 O

C3-

STM

1

10 P

S_F

P

11 P

S_F

P

12 P

S_F

P

13 P

S_F

P

14 P

S_F

P

1E0E

FAN

BIP & Breakers

11 2

1 2

6

4 5 6

1 2 37 8 9

10 11 12

13

14

1

TMU

-R

2

Fille

r

3

TMU

-R

4

TMU

-R

5

OM

U6 7

CC

1

8

CC

1

9

OM

U10 11

TM

U-R

12

TMU

-R

13

TMU

-R

14

TMU

-R

15

PS

I-1

3

TMU

-R

4

TMU

-R

5

MM

S

6

MM

S

7

Fille

r

8

Fille

r

9

MM

S

10

MM

S

11

TMU

-R

12

TMU

-R

13

TMU

-R

14

TMU

-R

15

PS

I-0

2

Fille

r

1

TMU

-R

7 P

S_F

P

0 C

P3

1 C

P3

2 P

S_F

P

3 P

S_F

P

4 P

S_F

P

5 P

S_F

P

6 P

S_F

P

15 P

S_F

P

8 O

C3-S

TM1

9 O

C3-

STM

1

10 P

S_F

P

11 P

S_F

P

12 P

S_F

P

13 P

S_F

P

14 P

S_F

P

1E0E

1E0E

FAN

BIP & Breakers

11 2

1 2

6

4 5 6

1 2 37 8 9

10 11 12

13

14


Control Node cards

• Function– Control of the RNC C-Node

and some I-Node functions– Disk management

• Provisioning– 2 cards, 1+1 hot/warm

redundancy (double slot card)

• Connectivity– One 100 baseT Ethernet port

(RJ45) for OAM

Operation and Management Unit (OMU)


Control Node cards

• Function– Storage of C-Node

informations

• Provisioning– One private MMS for each

OMU– Two shared MMS (1+1

redundancy)

Mass Memory Storage (MMS)


Control Node cards

• Function– Internal and external (to I-

Node) ATM switching

• Provisioning– 2 cards, 1+1 redundancy

• Connectivity– 1 multimode optical STM1 port

(SC connectors) to I-Node

Communication Controler (CC1)


Control Node cards

• Function– UMTS call processing

• Provisioning– 4 to 14 cards, N+P

redundancy– p=1 for n<=6, p=2 for 6<n<12

Trafic Management Unit (TMU-R)


Control Node cards

• Function– Power supply for C-Node (-48V)

• Provisioning– 1+1 Hot redudancy

Power Shelf Interface (PSI)


Interface Node system architectureSTM1 to/from CNode, Iu, Iur,

Iub

56 Gbits/s Fabric

56 Gbits/s Fabric

16p OC3/ STM1

CP3PS FP

100 bT Ethernet to

OAM


Interface Node cards

• Function– Internal switching (backplane)

• Provisioning– 2 cards, 1+1 load sharing

redundancy

PP15K Fabric



• Function– Controls overall I-Node

processing


• Connectivity– One 100 baseT Ethernet RJ45

connector for OAM

Control Processor (CP3)



• Function– Provide STM1/OC3

connectivity to/from Iu, Iub, Iur & C-Node


• Connectivity– 16 Singlemode optical STM1

ports (MT-RJ connectors)

16-port OC3/STM1 ATM Function Processor (16pOC3/STM1)


PCM RNC


16-port OC3/STM1 ATM Function Processor (16pOC3/STM1)

1 port to CNode

Iu (typical: 2 links)

Iub

Iur

0

1

2

3

4

5

6

7 15

14

13

12

11

10

9

8

SDH RNC

3 ports to PCM AN 1 port to CNode

Up to 4 ports

for hair pins

Iu (typical: 2 links)

Iub

Iur

0

1

2

3

4

5

6

7 15

14

13

12

11

10

9

8



• Function– High touch bearer processing,

interface bearer protocol, radio protocol handling

– Translation AAL2-> IP/AAL5– SARing function

• Provisioning– 4 to 12 cards, load sharing

redundancy

Packet Server Function Processor (PS FP)



• Function– Power supply for

Interface Node

Power Interface Module (PIM)

Upper shelf

Lower shelf

PIM

PIM

PIM

PIM

BIMBIM Backplane


BIP

Other element : BIP : Breaker Interface Panel

BIP provides a central location where redundant DC power feeds are connected to the switch and routed up to 4 BIM (Breakers Interface Module)

Power is distributed from the BIM to the shelves.

BIP contains an alarm unit for components’monitoring , alarm generation, LED status indicators control.


PCM Access Node Hardware description

STM1 to RNC INode

E1s to termination panel (and then to BTS)

MSA32STM1

CP2 MSA32


PCM Access Node layout (PP7480 Bay)• Termination panels

(multiplexers)

• Cable management assembly

• Function cards– 2 CP2– 3 MSA32 STM1– 0 to 4 MSA32

• Power supply blocs

• Cooling unit

0 C

P2

1 M

SA

32 S

TM1

2 15 C

P2

3 M

SA

32 S

TM1

4 5 M

SA

32 S

TM1

6 7 M

SA

32

8 9 M

SA

32

10 11 M

SA

32

12 13 M

SA

32

14


PCM Access Node cards

• Function– Controls the overall PP7K

processing


• Connectivity– One 10 baseT Ethernet port

(RJ45) for OAM

Control Processor (CP2)



• Function– Provide Optical STM1 to E1

connectivity conversion

• Provisioning– 3 MSA32 STM1– 0 to 4 MSA32Redundancy for E1 connectivity with

sparing panel optionRedundancy for SVCs connections wih

PNNI

• Connectivity– ATM UNI: 30 E1 ports per card– STM1 ports are 1+1 APS protected

E1 MSA32 & E1 MSA32 STM1 Function Processor

STM1


0 C

P2

1 M

SA

32 S

TM1

2 3 M

SA

32 S

TM1

4 5 M

SA

32 S

TM1

6 7 M

SA

328 9 M

SA

3210 11 M

SA

3212 13 M

SA

3214

1 2 3 1 2 3 4

15 C

P2

Msa32-STM1 Msa32

PCM Access Node : cards positioning


PCM Access Node : Sparing Panel option

0 C

P2

1 M

SA

32 S

TM1

2 3 M

SA

32 S

TM1

4 5 M

SA

32 S

TM1

6 7 M

SA

328 13

M

SA

3214

1 2 3 1 2 3 4

15 C

P2

Msa32-STM1 Spare Msa32Msa32

0 C

P2

1 M

SA

32 S

TM1

2 3 M

SA

32 S

TM1

4 5 M

SA

32 S

TM1

6 7 M

SA

328 13

M

SA

3214

1 2 3 1 2 3 4

15 C

P2

Msa32-STM1 Spare Msa32Msa32

When sparing panel is ordered, the spare board is recommended to be put in the last slot (13/14)


Particular Case : Hairpin on MSA32 card in case of UMTS/UMTS drop & insert

STM1 link

Node B #1

MSA32 STM1

Node B #2

#1 #2#1#1

hairpin

AAL1 circuit emulation

#2

Fractional E1

STM1 port

E1 port

#2#1

E1 port

E1 port

Groups of TS (channels)

VCCs

ATM



SDH RNC Internal connectivity

1

TMU

2

Fille

r3

TMU

4

TMU

5

OM

U6 7

CC

18

CC

19

OM

U10 11

TMU

12

TMU

13

TMU

14

TMU

15

PS

I-B

3

TMU

4

TMU

5

MM

S6

MM

S7

Fille

r8

Fille

r9

MM

S10

MM

S11

TMU

12

TMU

13

TMU

14

TMU

15

PS

I-A

2

Fille

r1

TMU

7 P

S

0 C

P3

1 C

P3

2 P

S

3 P

S

4 P

S

5 P

S

6 P

S

15 P

S

8 O

C3/

STM

1

9 O

C3/

STM

1

10 P

S

11 P

S

12 P

S

13 P

S

14 P

S

A N

ot U

sed

B N

ot U

sed

Ethernet HubTo OA&M

To TML

To Iu, Iub, Iur

Singlemode STM1100 baseT Ethernet

CC1 -> 16pOC3/STM1: Mutimode STM1 16pOC3/STM1 -> CC1 (attenuator): Singlemode STM1

Spare line


PCM RNC Internal connectivity

1

TMU

2

Fille

r3

TMU

4

TMU

5

OM

U6 7

CC

18

CC

19

OM

U10 11

TMU

12

TMU

13

TMU

14

TMU

15

PS

I-B

3

TMU

4

TMU

5

MM

S6

MM

S7

Fille

r8

Fille

r9

MM

S10

MM

S11

TMU

12

TMU

13

TMU

14

TMU

15

PS

I-A

2

Fille

r1

TMU

7 P

S

0 C

P3

1 C

P3

2 P

S

3 P

S

4 P

S

5 P

S

6 P

S

15 P

S

8 O

C3/

STM

1

9 O

C3/

STM

1

10 P

S

11 P

S

12 P

S

13 P

S

14 P

S

A N

ot U

sed

B N

ot U

sed

0 C

P2

1 M

SA

32 S

TM1

2 15 C

P2

3 M

SA

32 S

TM1

4 5 M

SA

32 S

TM1

6 7 M

SA

328 9 M

SA

3210 11 M

SA

3212 13 M

SA

3214

Ethernet HubTo OA&M

To TML

To Iu, Iur

To termination panel (not shown) then to Iub

Singlemode STM1100 baseT Ethernet

CC1 -> 16pOC3/STM1: Mutimode STM1 16pOC3/STM1 -> CC1 (attenuator): Singlemode STM1

Electrical E1

Spare line


Equipment and Link protection


Link protection

• Protection mecanism– On 16pOC3/STM1: Card protection (1+1 redundancy),

LAPS port per port (on different cards)– On MSA32 STM1: LAPS port per port (on the same card)– 50ms traffic interruption (should have low impact on

communications)

• ATM PNNI– Between Inode and PCM Access Node, to prevent MAS32

failure (should have an impact on communications)

• Protection on E1 links by the PCM AN (IMA and spare MSA32)


TerminologyEP (Equipment protection)

Passport functionality supported by 16pOC3/STM1 of the RNC which allows the switch over from active card to spare card in case of active board failure.

Even if APS and EP are 2 independent notions, for 16pOC3/STM1 boards dual FP APS can be triggered by EP in the only case where the failed board is the one that was providing the cell forwarding function AND/OR the “selected Line” was connected to the failed board.

Hot stand-by ( Case 1+1):

The stand-by FP is loaded with the same provisioning of the active FP. It also receives information from the active FP on the state of current processes and stores the information. If there is a failure of the active FP, the stand-by assumes the active FP role and begins processing information. Because it has copies of the active process state of the failed FP, there is no interruption of service and no impact on the network.

Warm stand-by ( Case 1+1):

Same as hot but with an interruption of service

• Cold stand-by (Case 1+1) :

The stand-by FP is loaded with the same provisioning of the active FP. It does not receive information from the active FP on the state of current processes. If there is a failure of the active FP, the stand-by assumes the active FP role and begins processing information. Because it does not have copies of the active information of the failed FP, any dynamic information is lost which may result in the need of re-start any in progress application.


LAPS (Line Automatic Protection Switch)

Automatic Protection Switching (ITU-T standard G.783) provides optical line protection through the use of K1/K2 signaling bytes and hardware connectivity between lines

There are two kinds of APS:

• single-FP APS : the original active port and the spare port may both be on the same functional processor ( case MSA32 STM1). (In the presentation we will call it APS)

• dual-FP APS : the original active port may be on an active FP and the spare port on an adjacent spare FP (case 16pOC3/STM1). (In the presentation we will call it LAPS)

The Univity RNC is compliant with the recommendation GR 253- Bellcore which define all the timing and requirement for LAPS.For the Univity RNC, the linear APS architecture chosen is 1+1 architecture. It means that the 16pOC3/STM1 transmits on both links and receives the traffic also on both links.*The board chooses either the working or the protection signal as the one from which to select the traffic, the one chosen is called selected link.The switch from the selected line to the protection line can be due to LOS (Loss of Signal), Loss of Framing (LOF), Loss of Cell Synchronization (LOC), high Bit Error Rate (BER) ….

* : note that it would not be the case in 1:1 architecture where the source end transmits only the traffic (ATM cells) on the selected link. The unselected link carries no traffic just signaling and Sonet framing


LAPS (Line Automatic Protection Switch)

•Unidirectional/ Bidirectional The default mode is unidirectional, it means that when the receiving equipment has determined the need for switching from the selected line to the protection line then it switches autonomously immediatly and signals the other equipment he has switched. The other equipment receives this information thanks to K1/K2 signaling and selects the other line.

Thank to provisionning bidirectional mode can be chosen, in that case negocation between the two equipments is required before making a switchover. The equipment which needs to switch sends the request to the other equipment which responds agreement (or not) to making the switchover. If both equipments agree the selected line is switched at both ends ( more or less at the same time).

•Revertive/ Non revertiveA 1+1 APS also uses as a default non revertive switching. It means that the switch to the newly selected link is maintained even after the initialy selected line has recovered from the failure that caused the switch over.

As this is also a provisionable option we can choose revertive switching, in that case the traffic is switched back to the initialy selected line when it has recovered from the failure.


Normal case : The 16pOC3/STM1 supports dual FP APS. There is one active card,one spare card. Both 16pOC3/STM1 are transmitting and receiving the traffic,the selected link is the one chosen by the two nodes in communication (it can be theprotection link)

16p OC3/STM1

RNC (CNode & INode)16p OC3/STM1

LAPS

16pOC3/STM1: LAPS

Active cardSpare card

Working portProtection port

Protection link

Selected link

Convention for the presentation : the selected link is the one linked to the working board


Active 16pOC3/STM1 Card failure: Equipment protection between 16pOC3/STM1 is triggered. The active board becomes the one previously called protection board. LAPS is triggered by EP only if the failed board was that which was providing the cellforwarding function AND/OR the “selected Line” was connected to the failed equipment,(if the spare FP with the unselected line failed, then NO Sonet APS is needed as the “selected line” experienced NO failure, the “Active FP” experienced no failure,the loss impacted ONLY the spare FP.

16pOC3/STM1: Equipment Protection

16p OC3/STM1

16p OC3/STM1

RNC (CNode & INode)

Equipement protection

Failed cardActive card

Working port

Selected link

Protection link

1+1 HOT STANDBY

Switch over time : 50 ms

Switch


16p OC3/STM1

Protection 16pOC3/STM1 Card failure:No action : no EP, no LAPS

16pOC3/STM1: Equipment ProtectionRNC (CNode & INode)16p OC3/STM1

Failed cardActive card

Working port

Selected link

Protection link


16p OC3/STM1

16p OC3/STM1

RNC (CNode & INode)

Selected Link failure: The selected link switches on the protection board.Only the failed link switches. If there are other links on other ports of the working card they remain on the same board.

16pOC3/STM1: LAPS

LAPS

Active cardProtection card


Failed link

Selected link

APS Switch over time : 50 ms


Normal case: MSA32 STM1 supports single FP APS, one port is protected by its mate on the same board. On one MSA32 STM1 either the 2 ports are used and are APS protected either only one is used.

MSA32 STM1: APS


Protection link

Selected link

PCM Access NodeMSA32 STM1

MSA32 STM1

MSA32 STM1

APS APS APS


Link failure: The selected link switches to the protection link on the adjacentport.

MSA32 STM1: APSPCM Access Node

MSA32 STM1

MSA32 STM1

MSA32 STM1

APS APS APS


Failed link

Selected link

APS Switch over time : 50 ms


Board failure: Sparing panel feature (optional) garantees the save of E1 links only.PNNI feature is used to rerouted the SPVCs. Only optical links are protected.

MSA32 STM1: APS

Working cardFailed card


Protection link

Selected link

PCM Access NodeMSA32 STM1

MSA32 STM1

MSA32 STM1

APS APS APS


16p OC3/STM1

16pOC3/STM1: LAPS on interfaces

Working cardProtection card


Protection link

Selected link

16p OC3/STM1

RNC (CNode & INode)

LAPS

All interfaces that carry aal2 UP traffic must be either all protected either all unprotected.

This is due to the software structure of IuxIf.

•All other interfaces (Icn, IuPs) may be either protected or unprotected separatly on both FPs.

•The recommendation is to protect all interfaces with APS. Because in case of the active16pOC3/STM1 failure, the traffic of the interface non protected will be dropped.

LAP

S

LAPS

Iub

Iur

Iu


16p OC3/STM1

16pOC3/STM1: LAPS on interfaces



Protection link

Selected link

16p OC3/STM1

RNC (CNode & INode)

LAPS

•In case of facing passports or other equipments able to support LAPS , the recommendation is to set LAPS as

•Unidirectional

•Non revertive

If VPT shaping with hairpin 2 ports is activated

LAP

S

LAPS

Iub

Iur

Iu


16pOC3/STM1: case of core network not supporting APS



Stand by port

Failed link

Active port

Selected link

Case of non Nortel Core Network:

Even if the core network does not support APS, the recommendation is to implement LAPS anyway on Iu-CS. One port will be effectively connected, the other not.

Advantages : To keep Iub and Iur protected.

Drawback: it will generate alarms. EP will not work in this case as EP needs LAPS in order to work.

Not connected

Iu

Iub

16p OC3/STM1

16p OC3/STM1

RNC (CNode & INode)

LAPS

LAPS

LAPS



Protection link

Selected link


PCM RNC: IN – AN link protection

No failure: One active 16pOC3, one passive – all MSA32 active



Protection link

Selected link

16p OC3/STM1

RNC (CNode & INode) PCM Access Node16p OC3/STM1

MSA32 STM1

MSA32 STM1

MSA32 STM1

LAPSLAPS

LAPS


PCM iRNC: IN –AN link protection

16pOC3/STM1 Card failure: equipment protection between 16pOC3 which leads to the switch over of the links and APS between ports on MSA32

16p OC3/STM1


MSA32 STM1

MSA32 STM1

MSA32 STM1

Equipement protection

LAPSLAPS

LAPS

Active cardFailed card

Active portProtection port

Protection link

Selected link


PCM RNC: IN – AN link protection

Link failure: LAPS between ports on different 16pOC3 and on the same MSA32

LAPS

16p OC3/STM1


MSA32 STM1

MSA32 STM1

MSA32 STM1

LAPSLAPS



Protection link

Selected link


PCM RNC: IN –AN link protection

MSA32 failure: ATM PNNI uses the available links - PNNI SPVC are rerouted dynamically on other card MSA32, E1s are lost

16p OC3/STM1


MSA32 STM1

MSA32 STM1

MSA32 STM1

LAPSLAPS

LAPS



Protection link

Selected link


Icn protection scheme (1/4)Normal case:

CC1 does not support LAPS (it can not decode the K1/K2 signaling bytes) but a proprietary solution has been implemented in the CC1 board which allows to configure anyway LAPS on port #8 of the 16pOC3/STM1 as unidirectional and non revertive.

The way it works :

CC1s transmits on both links

CC1 receives on both links

16pOC3 transmits on both links

16pOC3 receives on both links

Both CC1 are working simultaneously and transmit information to TMUs (and OMUs).

TMU-Rs receive similar traffic from both CC1, they select the traffic from one of the CC1(algo for plane resolution). If the reception is bad (LOS, LOF …) the CC1 will stop to transmit a clock to TMUs what will indicate to TMU to choose the other CC1.

The 16pOC3/STM1 applicative layer chooses the link to listen to.

16pOC3/STM1 #1

TMU-RTMU-R TMU-R TMU-R TMU-R

I-Node

C-Node

16p-Tx

CC1 #2

Rx Tx

16p-Rx

Port #8Tx Rx

Applicative Layer

16pOC3/STM1 #2

CC1 #1

Tx Rx

CC1-Tx

Rx Tx Port #8

CC1-Rx CC1-Rx CC1-Tx

Selected traffic

Non Selected traffic


Icn protection scheme (2/4)

Link failure

• CC1 work in active/active model. Both are working simultaneously

• CC1 #1 detects a Loss of Signal due to fiber failure, it stops sending its clock to TMUs. TMUs take the traffic from the CC1 #2

• 16pOC3/STM1 detects a loss of Signal and switches (port #8 only).

I-Node

Switch

CC1

#1

CC1

#2

TMU-R TMU-RTMU-R

16p OC3/STM1

STM1 fibers

C-Node

16p OC3/STM1

Active board

Spare board

Working port

Protection port

Failure



16pOC3/STM1 #1

CC1 failure:

• CC1 #1 fails, then CC1 #1 resets

•CC1#1 transmission fiber reset

•16pOC3/STM1 detects a LOS and switches its line on port #8

TMU-RTMU-R TMU-R TMU-R TMU-R

I-Node

C-Node

16p-Tx

CC1 #2

Rx Tx

16p-Rx

Port #8Tx Rx

Applicative Layer

16pOC3/STM1 #2

CC1 #1

Tx Rx

CC1-Tx

Rx Tx Port #8

CC1-Rx CC1-Rx CC1-Tx

Selected traffic

Non Selected traffic

Switch



16pOC3/STM1 failure:

•The protection 16pOC3/STM-1 becomes active.

•selected link switches.

• CC1 #2 continues to receive the payload then there is no specific action. I-Node

CC1

#1

CC1

#2

TMU-R TMU-RTMU-R

16p OC3/STM1

APS

STM1 fibers

16p OC3/STM1

C-Node

Switch

Active board

Failed board

Failure


UTRAN

62

No failure: N active TMU-R, P passive TMU-R

TMU-R: N+P redundancy (1/2)

3 N 12

P=1 if N6

P=2 if N >6

N active boards P spare boards

TMU-R TMU-RTMU-RTMU-RTMU-RTMU-R

Univity RNC Engineering Overview - 63NORTEL NETWORKS CONFIDENTIAL63

TMU-R failure: Cells on faulty TMU-R are lost, calls on faulty TMU-R are dropped, calls with all radio links on lost cells are dropped.Cells are recreated and took over by a spare board

TMU-R: N+P redundancy (2/2)

Card failure

N active boards

TMU-R TMU-R TMU-RTMU-RTMU-R TMU-R

One of the P spare boards becomes active


Load reserve Load reserve Load reserve

Load used

Load reserve

Load used Load used Load used

N active PSFP with 4 N 12

No failure: N cards PSFP are active. The load is shared between the cards with a load reserve.

PSFP: load sharing (1/2)


Load used Load used Load used

One PSFP (PDC) failure: the load is shared between the remaining cardsCalls and cells on the faulty board are lost.Lost cells are recreated on the remaining boards thanks to the load reserveThroughput is reduced to 11/12 as the load reserve guarantee only the cellsrecreation and not the calls.

PSFP load sharing (2/2)

PSFP failure


• PMC-M : 1+1 Hot redundancyIn case of PMC-M failure, the stand-by PMC-M becomes active.

No impact on established cells and calls but no new calls during 5s

Reset of half PSFP (PMC sharing the same Maker chip as the faulty PMC-M)

• PMC-RAB : Load sharingIn case of PMC-RAB failure, cells are recreated on the other PMC-RAB.

Reset of half PSFP (PMC sharing the same Maker chip as the faulty PMC-RAB)

All communications on the faulty PMC are lost.

• PMC-PC: Load sharing All the traffic on the PMC-PC (coming from 16 pOC3/STM1 board and PMC-RAB) is redirected to other PMC-PC within 100 ms of the fault being detected.

Reset of half PSFP (PMC sharing the same Maker chip as the faulty PMC-PC)- See PMC-RAB redundancy.

All impacted cell common channels may lose packets but are not dropped.

All impacted calls (having a radio link using one of the failed paths) may lose packets but are not dropped.

PSFP‘s modules

One PMC failure = Half PSFP failure.


Other boards (1/3)• Control Node

– OMU : 1+1 Cold redundancy

One active, one in stand-byIn case of one OMU failure the OAM link is cut. The stand-by OMU becomes actives and restarts itself and all the TMUsSWACT=20 minAll cells are lost and recreated. All calls are dropped.

– CC1 : 1+1 Hot redundancy

Both CC1 working simultaneouslyNo incidence in case of CC1 failure.

– Private MMS : linked to redundancy of OMUIf private MMS of the active OMU fails, there is a switch of OMU and a restart of C-Node (20min).All cells are lost and recreated. All calls are lost.

– Shared MMS : 1+1 Hot redundancy

Information is duplicated in both cards and OMUs are connected to both cards.

In case of one shared MMS failure, there is no outage

– PSI : 1+1 Hot redundancy

No outage in case of PSI failure


Other boards (2/3)• Interface Node

– CP3 : 1+1 Hot redundancy

CP3 switch over

No outage - OAM link not cut

– Fabric :1+ 1 Hot redundancy

Both fabrics are working simultaneously No outage in case of one fabric failure. Capacity is reduced to 56 Gb/s ?


RNC Dimensioning


RNC Dimensioning highlights

• RNC is a scalable product– Upgrade&Pay as you grow

• Main dimensioning factors– Iub connectivity: PCM (E1) or SDH– Cells / NodeB– Traffic– Limiting cards are: TMU-R in the CNode and PS FP in

the INode

• RNC capacity depends on the call profile


RNC Dimensioning parameters

• Limiting cards– TMU-R in Cnode (number of users & user contexts)– PS FP in Inode (traffic switching & number of user)

• Engineered configurations– 9 configurations (5 PCM, 4 SDH)– Homogeneous configurations– Low to big capacity– Any other configuration than the engineered ones are

allowed, provided they fit the market models


RNC Engineered configurations Release 3

Configurations iRNC300S

4-4-0 iRNC300S

7-7-0 iRNC300S

11-10-0 iRNC300S

14-12-0 iRNC300P

4-4-3 iRNC300P

6-6-5 iRNC300P

9-7-5 iRNC300P

12-10-7 iRNC300P

14-12-7 Configuration TMU-R 4 7 11 14 4 6 9 12 14 Packet Server FP 4 7 10 12 4 6 7 10 12 MSA Card (32 E1) 0 0 0 0 3 5 5 7 7 Coverage and Connectivity Max number of NodeB 80 140 200 200 80 120 140 200 200 Max number of Cells 360 720 1080 1200 360 600 840 1200 1200 Max E1 without IMA 0 0 0 0 90 150 150 210 210 Max E1 with IMA N/A N/A N/A N/A N/A N/A N/A N/A N/A Max STM1 Iu/Iur/Iub Clear(1) 15 15 15 15 8 8 8 8 8

Capacity

Iu DL+UL applicative 30 60 90 120 30 50 70 100 120

Reference subscribers 39 000 79 000 120 000 160 000 39 000 66 000 92 000 130 000 160 000


OAM Connectivity


Connection to OAM Network

• Connection types

Out of band OAM:The OAM messaging use a separate ethernet

network

In-band OAMThe OAM messaging use the same physical links

than traffic


Out of Band OAM

Interface NodeManaged by MDM

OMC-B IP routing (in CP3): IP/ATM to/from IP/Ethernet

OMC-B TrafficIP/AAL5/ATM (over STM1) on

dedicated PVC (per BTS)

SDH RNC

OMC-B, MDM and Call Trace Traffics

IP/Ethernet (100bT)

OMC-R and call trace traffics

IP/Ethernet (100bT)

OMC-B TrafficIP/AAL5/ATM (over E1) on dedicated PVC (per BTS)

Node BManaged by OMC-B

Control NodeManaged by OMC-R

ATMBackbone

Iub

Iub

Iu

8p Hub

OAM Network

SDH RNC OMC-B, OMC-R, MDM and Call trace TrafficsIP/Ethernet (100bT)


Out of Band OAM

Interface NodeManaged by MDM

OMC-B IP routing (in CP3): IP/ATM to/from IP/Ethernet

PCM RNC

OMC-B TrafficIP/AAL5/ATM (over E1) on dedicated PVC (per BTS)

Node BManaged by OMC-B

Control NodeManaged by OMC-R

PCM Access NodeManaged by MDM

OMC-B and MDM TrafficsIP/AAL5/ATM (over STM1) on

dedicated PVCs (per BTS)

OMC-B, MDM and Call trace Traffics

IP/Ethernet (100bT)

OMC-B, OMC-R, MDM and Call trace TrafficsIP/Ethernet (100bT)

OMC-R and call trace traffics

IP/Ethernet (100bT)

Iub

Iu

8p Hub

OAM Network

PCM RNC


In Band OAM - Connections

MSA32

MSA32

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

TMU

TMU

TMU

MSA32

CP

CP

MSA32

STM1

Node B

STM1

CC1

MMS

MMS

OMU

BIP & BreakersRNC NEBS Frame

CP3

FANs

16pOC-3

PSI

PSI

EthHub

OMC-RMDM

OMC-B

RNC In band OAM CNode : OMU-HUB-CP3-16pSTM1-cloud-OMCR/MDM INode : CP3-16pSTM1- cloud-OMCB/MDM NodeB : NodeB-Msa32->STM1 -16pSTM1 -/-16pSTM1-cloud-OMCB/MDM ANode : CP- Msa32->STM1 1-16pSTM1 -/-16pSTM1 -cloud-OMCB/MDM


PCMx ConfigurationOptical STM - 1Electrical STM - 1Optical OC - 3Ethernet 100Electrical E1

6 m

PktServ

FP

6 m

PktServ

FP

TMU

TMU

TMU

TMU

TMU

TMU

TMU

TMU

TMU

MSA32

MSA32

MSA32

STM1

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

CP3

TMU

MMS

MMS

MMS

MMS

TMU

TMU

TMU

CC1

OMU

MSA32

MSA32

MSA32

STM1

CP

CP

MSA32

STM1

PP 7480

Node B

STM1 To CN and Node B with APS

TMU

CC1

OMU


CP3

FANs

16pOC-3

/STM-1

16pOC-3

/STM-1

PSI

PSI

EthHub

OMC-R/MDM/OMC-B


SDHx Configuration

Optical STM - 1Electrical STM - 1Optical OC - 3Ethernet 100Electrical E1

6 m

PktServ

FP

6 m

PktServ

FP

TMU

TMU

TMU

TMU

TMU

TMU

TMU

TMU

TMU

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

CP3

TMU

MMS

MMS

MMS

MMS

TMU

TMU

TMU

CC1

OMU

STM1 To CN and Node B with APS

TMU

CC1

OMU


CP3

FANs

16pOC-3

/STM-1

16pOC-3

/STM-1

PSI

PSI

EthHub

OMC-R/MDM/OMC-B


MSA32

MSA32

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

6 m

PktServ

FP

TMU

TMU

TMU

MSA32

CP

CP

MSA32

STM1

Node B

STM1

CC1

MMS

MMS

OMU


CP3

FANs

16pOC-3

PSI

PSI

EthHub

OMC-R/MDM/OMC-B

RNC Out band OAM CNode : OMU-HUB- OMCR/MDM INode : CP3- HUB- OMCB/MDM NodeB : NodeB- Msa32->STM1 -16pSTM1 -/-16pSTM1-cloud-OMCB/MDM ANode : CP- Msa32->STM1 -16pSTM1- CP3 - HUB - OMCB/MDM

Out Band OAM - Connections


RNC Synchronization


RNC Synchronisation

• RNC doesn’t need external clocking reference– RNC follows Passport 15k and 7k synchronisation scheme– RNC has a Sratum 3 clock (accuracy = +/- 4.6 10-6s)

• Node B needs +/- 10-9 s accuracy– In the case of direct connection, RNC needs to provide that

accuracy

• Three synchronisations methods– Internal (Stratum 3 clock)– External (Better than Stratum 3 via dedicated DS1 or E1

link on CP3)– Line (Better than Stratum 3, extracted from 1 STM1 link on

16pOC3/STM1)


RNC & UTRAN SynchronisationSDH RNC

Node B(BTS)

ATMBackbone

RNC(C-Node & I-Node)

IubOptical STM1

IubElectrical E1

IuOptical STM1

ATMBackbone

Option 1: Line synchro via Iu RNC Synchro via STM1 line

Stratum 1 clock (+/- 1.0 10-11 s)

Option 2: External synchro1 to 2 framed E1(or DS1)

Stratum 1 clock (+/- 1.0 10-11 s)

Option 3: Line synchro via IubRNC Synchro via STM1 line

Stratum 1 clock (+/- 1.0 10-11 s)


RNC & UTRAN SynchronisationPCM RNC

Option 1: Line synchro via Iu RNC Synchro via STM1 line

Stratum 1 clock (+/- 1.0 10-11 s)

Option 2: External synchro1 to 2 framed E1(or DS1)

Stratum 1 clock (+/- 1.0 10-11 s)

Option 3: Line synchro via PCM ANPP7K external synchro via 1 to 3 framed

E1(or DS1, or STM1) RNC Synchro via STM1 line

Stratum 1 clock (+/- 1.0 10-11 s)

Node B(BTS)

C-Node & I-Node

Optical STM1

IubElectrical E1

IuOptical STM1

PCM Access Node(colocalised)

RNC

ATMBackbone


Electrical and mechanical characteristics


Power Consumption depending On configurations

Wne RNCengoverview

Documents

Transcript of Wne RNCengoverview