McRNC

McRNC Product Introduction

mcRNC Transport Introduction BCN-B HW (RU40 / mcRNC3.0)

2x USB 1x RJ-45

Software download (BCN eSW, NSN personnel)

Hardware maintenance Debugging interfaces

1x SFP - Trace port (External port mirroring) - SFP22 (Megamon/monitoring)

10x SFP

7x SFP+ Backplane

1GE external ports SFP13 – SFP22

4x RJ-45

SFP LAN1 O&M

2x SFP+ 10GE external ports SFP+ 11, SFP+ 12

Alarm and sync interfaces, not used by mcRNC

mcRNC Transport Introduction BCN-B HW (RU40 / mcRNC3.0)

Interface type

Number of interfaces

Printed label

Backplane ports (Internal 10GE)

7

SFP0 – SFP6

External 1GE network connectivity: External 1GE

10

SFP13 – SFP22

• •

1000Base-TX, electrical transmission via SFP with RJ-45 connector 1000Base-SX/LX, optical transmission via SFP with LC-type connector

O&M connectivity (two first BCN modules): External 10GE

Trace port / MegaMon

2

1

SFP+ 11 SFP+ 12

•

“Trace” / SFP21 or SFP22

on the following standards:

LAN1 (eth0)

External 10GE network connectivity is implemented based

• •

10GBASE-SR acc. IEEE 802.3-2008 Clause 49 and 52.5 10GBASE-LR acc. IEEE 802.3-2008 Clause 49 and 52.6

Note: Either 1*10GE + 10*1GE or 2*10GE are supported simultaneously per BCN-B for external connectivity

The mcRNC high level functions

The mcRNC architecture consists of the following high level functions: • network interface functions • switching functions • control plane processing • user plane processing • carrier connectivity functions • O&M functions The functions are distributed in entities of hardware and software. The main functional units of the RNC are listed below.

• Centralized Functions Processing Unit (CFPU) • Cell-Specific Processing Unit (CSPU) • UE-Specific Processing Unit (USPU) • External Interface Processing Unit / Network Processing unit (EIPU) • Data Base (DB)

mcRNC Transport Introduction

• mcRNC Transport Solution • mcRNC supports IP transport option • Network connectivity and transport layer processing capacity is aligned with the control plane and user plane processing capacity • mcRNC3.0 and BCN-B Octeon II HW: Both 1GE and 10GE Ethernet connectivity supported • All network processing units (EIPU) process traffic at normal conditions • Full transport redundancy is provided for the failure cases • Connectivity to separate physical router pairs is supported

Capacity step: S7

mcRNC Transport Introduction

8 * BCN available in

Capacity steps (mcRNC3.0 / BCN-B)

mcRNC3.0

Capacity step: S3

BCN-B / Octeon II

#BCN = 4 #EIPU = 8

RU50 EP1

Number of EIPUs BCN4: 2

Capacity step: S1

#BCN = 2

BCN3: 2

#EIPU = 4

BCN2: 2 BCN1: 2 BCN = Box Controller Node EIPU = Network Processing Unit

mcRNC capacity limitations Supported configurations –Octeon II HW mcRNC capacity step

S1-B2

S3-B2

S7-B2

CS BHCA

760 000

2 140 000

4 520 000

PS BHCA

1 400 000

3 500 000

7 920 000

PS Session BHCA

2 800 000

7 000 000

15 840 000

Smartphone BHCA

1 170 000

2 940 000

6 660 000

1850 / 790

5260/2260

14000/6000

19000

53500

113 000

520

1320

2 000

Carrier connectivity

2600

6600

10 000

RRC connected state UEs

352 000

1 000 000

1 000 000

30 000

75 000

170 000

1665

4734

12600

500

1420

5400

max Iub DL/UL throughput [Mbps] AMR/CS voice over HSPA capacity [Erlangs] BTS connectivity

Laptop HSPA active users per RNC IuPS HSDPA net bit rate [Mbit/s] IuPS HSUPA net bit rate [Mbit/s]

S1-B2

S3-B2

S7-B2

2 BCN-B modules, OcteonII processors

4 BCN-B modules, OcteonII processors

8 BCN-B modules, OcteonII processors

Always check the capacity figures with the latest mcRNC Product Description

mcRNC Transport Introduction BCN-B

mcRNC BCN #2

EIPU-3 CSPU CSPU

SFP+11

10GE

EIPU-1

USPU USPU USPU

MX240-1

CFPU-1

GE GE OMS

ToP GE

GE EIPU-2 CSPU CSPU

MX240-2

SFP+11

10GE

EIPU-0 1GE USPU USPU USPU

CFPU-0

mcRNC BCN #1

LAN1 (eth0)

– – – –

Hosts O&M and centralized processing functions Owns management Ethernet ports (LAN1) Services with 2N redundancy Contains IP networking and routing functions

• Network Processing Unit (EIPU) – – – – –

1GE LAN1 (eth0)

• Centralized Functions Processing Unit (CFPU)

Transport layer traffic termination for control plane and user plane Owns external interfaces (SFP / SFP+) All nodes process traffic in normal conditions Services with 2N redundancy Contains IP networking and routing functions

• UE-Specific Processing Unit (USPU) – UE-specific control and user plane processing – Control/user plane resources of one UE are located to one USPU – No external transport termination

• Cell-Specific Processing Unit (CSPU) – Cell-specific control and user plane processing – BTS/Cell resources are located to one CSPU – No external transport termination

mcRNC OSPF Site Solution

mcRNC OSPF Site Solution - Iu User plane - Iub user and control plane - mcRNC Management Plane (Independent from the EIPU connectivity)

mcRNC OSPF Site Solution • Related features • RAN2256 Ethernet Link Aggregation for mcRNC • Requires RAN2256 license • RAN2550 OSPF Enhancements in mcRNC (OSPF + BFD) • Requires “RAN1510 OSPF for Redundancy” license • RAN2257 Support of Virtual Routing and Forwarding in mcRNC • RAN2696 mcRNC 10GE based network connectivity

• BCN-B / Octeon II HW • Required for 10GE network interfaces • RAN2240 mcRNC HW release2 support • Required Site router functions • OSPF with BFD Single-Hop • 1GE and 10GE interfaces

mcRNC OSPF Site Solution Iu/Iur user plane and Iub control and user plane • OSPF dynamic routing is applied for • Iu/Iur user plane • Iub control/user plane • The application IP addresses for the service termination • Configured to the loopback interface • Recovery Group (RG) as the owner of the address • IP address is located at EIPU node where the active Recovery Unit of the Recovery Group (QNUP/QNIUB) is located

mcRNC OSPF Site Solution Iu/Iur user plane and Iub control and user plane • The interface or link failure is detected with the Link State Detector functionality (10GE) • Link State Detector is configured with 10GE and LAG interface since one EIPU is connected to one site switch • Link State Detector is bound to RG and configured to monitor network interface(s) and OSPF neighbour state. In case of link or interface failure the RG switchover will be triggered. • Recovery Group (QNUP, QNIUB) protection switchover may be triggered due to the following events: • SW failure (mcRNC redundancy mechanisms) • HW failure (EIPU, BCN) • Link/Interface failure or Next hop failure monitored via BFD Single-Hop (Link State Detector) (OSPF SiSo, 10GE)

mcRNC Iu/Iub User plane

mcRNC OSPF Site Solution

OSPF SiSo

•EIPUs of one BCN are connected to one site router; site routers are interconnected

.

0 /0/ 2

DCN

.

VRF

/

IUPS3VL9 10.0.9.3/28 IUCS3VL10 10.0.10.3/28 IUR3 VL11 10.0.11.3/28 IUB3 VL12 10.0.12.3/28

10GE

VRF

R2

-O&M (default) NetAct

- Iu/Iur control plane - Iu-PS user plane - Iu-CS/Iur user plane -Iub

et h_r2

IUPS4VL13 10.0.13.3/28 IUCS4VL14 10.0.14.3/28 IUR4 VL15 10.0.15.3/28 IUB4 . VL16 10.0.16.3/28

e th _r1

EIPU -3 QNUP-2&QNIUB-2STANDBY)

.

•VRFs are applied for separating the routing processes VRFs

S F P +11 e th _ b

IUR4 VL15 10.0.15.2/28 IUB4 VL16 10.0.16.2/28

et h_r2

IUPS4VL13 10.0.13.2/28 IUCS4VL14 10.0.14.2/28

•L3 type of site solution with dynamic routing

• Supports 1GE and 10GE interfaces

Backhaul Network

redundant 10GE

0 /0 /2

VRF

IUPS3VL9 10.0.9.2/28 IUCS3VL10 10.0.10.2/28 IUR3 VL11 10.0.11.2/28 IUB3 VL12 10.0.12.2/28

e th _r1

QNUP-0&QNIUB-0STANDBY)

QNUP-3(Act) 10.1.1.4 upsup 10.1.1.20iucsup 10.1.1.36iurup 10.1.0.4ubup 10.1.0.68iubcp(QNIUB3)

Base Stations

R1

mcRNC BCN#2

EIPU-1 QNUP-1(Act) 10.1.1.2 upsup 10.1.1.18iucsup 10.1.1.34iurup 10.1.0.2ubup 10.1.0.66iubcp(QNIUB1)

•two EIPUs in different BCNs form a pair

VRF

•OSPF with BFD (Single Hop) or OSPF Fast Hello applied for fast reaction to link failures

e t h_r2

IUPS2VL5_10.0.5.3/28 IUCS2VL6_10.0.6.3/28 IUR2 VL7 10.0.7.3/28 IUB2. VL8 10.0.8.3/28

et h_r1

VRF

QNUP-2(Act) 10.1.1.3 upsup 10.1.1.19iucsup 10.1.1.35iurup 10.1.0.3iubup 10.1.0.67iubcp(QNIUB2)

IUPS1VL1_10.0.1.3/28 IUCS1VL2_10.0.2.3/28 IUR1 VL3 10.0.3.3/28 IUB1 VL4 10.0.4.3/28

10GE

SF P +11 e th _ a

IUPS2VL5_10.0.5.2/28 IUCS2VL6_10.0.6.2/28 IUR2 VL7 10.0.7.2/28 IUB2 VL8 10.0.8.2/28

EIPU -2

QNUP-3&QNIUB-3(STANDBY)

IUPS1VL1_10.0.1.2/28 IUCS1VL2_10.0.2.2/28 IUR1 VL3 10.0.3.2/28 IUB1 VL4 10.0.4.2/28

e th _r2

QNUP-0(Act) 10.1.1.1upsup 10.1.1.17iucsup 10.1.1.33iurup 10.1.0.1iubup 10.1.0.65iubcp(QNIUB0)

VRF VRF

Vl5V10.0.5.1 LAN_Iu2 Vl6 1010.0.6.1 .0. .33/28 Vl7V10.0.7.1 L u Vl8 1010.0.8.1 .0.1 5 8 Vl13 2 V 10.0.13.1 Vl14 1 .010.0.14.1 .33/2 Vl15 10.0.15.1 VLA Iub2 Vl16 10.0.16.1 10.0 . .65/ 8

QNUP-1&QNIUB-1(STANDBY)

e th _r1

EIPU -0 EIPU-0

_ Vl1 10.0.1.1 Vl2 10.0.2.1 . . Vl3 10.0.3.1 Vl4 1 10.0.4.1 Vl9 10.0.9.1 I Vl1010.0.10.1 Vl1110.0.11.1 Vl1210.0.12.1

OSPF areas: mcRNC BCN#1

mcRNC Management Plane / O&M connectivity

• Management plane is terminated in mcRNC CFPU node and it is protected by Recovery Group based redundancy scheme • Routing • OSPF + BFD Single-Hop • Static routes + BFD Single-Hop • Routing instances (VRF / Virtual Routing and Forwarding) • O&M services are located to default VRF instance • Exception: The source IP address for BTS O&M messaging towards the BTS can be located to other than default VRF

mcRNC Management Plane / O&M connectivity

• WBTS and OMS O&M communication (BTS O&M messaging) can have either one common or separated source IP addresses: • One source IP address, QNOMU • One IP address contains two role attributes • IP address with role “btsom” & role “oms” • Two source IP address, QNOMU • WBTS communication with IP address having role “btsom” • OMS communication with IP address having role “oms” • IP address for WBTS communication can be located to other than default VRF

mcRNC Management plane / OSPF mcRNC BCN #1

OSPF area 10.10.0.0

VLAN_MP1 10.0.0.6/30

GE

VLAN_MP1 10.0.0.5/30

VLAN_MP 10.0.0.1/30

QNOMU 10.0.10.1/32 role bts 10.10.0.2/32 role oms

LAN1

oam_int, 10.0.10.4/30

0/0/10

CFPU-0 MX240 #1 Base Stations

SSH 10.10.0.1/32 role ssh Backhaul Network

mcRNC BCN #2 CFPU-1

VLAN_MP2 10.0.0.10/30

GE

VLAN_MP2 10.0.0.9/30

VLAN_MP 10.0.0.2/30

SSH standby

LAN1

QNOMU standby

0/0/10

oam_int, 10.0.10.5/30

NetAct

MX240 #2

mcRNC Management Plane / Static route mcRNC BCN #1 VLAN_MP1 10.0.0.6/30

GE

VLAN_MP1 10.0.0.5/30

VLAN_MP 10.0.0.1/30

QNOMU 10.0.10.1/32 role bts 10.10.0.2/32 role oms

LAN1

cfeigw, 169.254.0.4

0/0/10

CFPU-0 MX240 #1 Base Stations

SSH 10.10.0.1/32 role ssh Backhaul Network

mcRNC BCN #2 CFPU-1

VLAN_MP2 10.0.0.10/30

GE

VLAN_MP2 10.0.0.9/30

VLAN_MP 10.0.0.2/30

SSH standby

LAN1

QNOMU standby

0/0/10

cfeigw, 169.254.0.5

NetAct

MX240 #2

mcRNC Iu/Iur control plane (SCTP Multihoming)

mcRNC Iu/Iur control plane OSPF SiSo, • Static route configuration is applied for Iu / Iur control plane traffic • Control plane resilience for Iu and Iur interfaces is provided by two different layers • M3UA layer enables use of multiple SCTP associations for the same signalling connection • SCTP layer provides multi-homing support for increased end-to-end redundancy • The IP addresses of the multi-homed SCTP association are configured mcRNC backplane and network interface interfaces reserved for the SCTP/SIGTRAN configuration (sctp interfaces). • IP address of the SCTP link is configured into the same interface from where the related traffic is sent out from the node

mcRNC Iu/Iur control plane OSPF SiSo, • SCTP associations configuration • Signalling connections towards the core network elements (that is MSS and SGSN) should be using at least four EIPU nodes for the M3UA layer resilience and EIPU load balancing • Neighbour RNCs should be configured to at least to one or two EIPUs each, using different EIPUs per neighbouring RNC • The SCTP associations towards all CN elements and neighbor RNCs should be evenly distributed over the EIPU nodes of the mcRNC

• Iu/Iur control plane is located to VRFs 1 – 4 • VRFs1-4 contain the backplane sctp interfaces pre-configured by the system

mcRNC Iu/Iur control plane OSPF SiSo Path To Control Plane 1 network

mcRNC BCN #1 SCTP -1

sctp2_1 10. 1. 8. 145/28

S F P + 11

VLAN _Iu _ C1 10 . 1. 8. 2 /2 8

sctp1_1 10 .1.8.17/ 28 (gw)

10GE

0/ 0/ 2

EIPU - 0

Static route to mcRNC 10. 1 .8 .16 / 28 via 10 . 1. 8. 2

VLAN _ Iu _C 1 10 .1 .8 .1 / 28 R1

MSC Server/ MSS / SGSN

EIPU - 2

SCTP -3

sctp1_1 10.1.8.19/28 sctp2_1 10.1.8.147/28 redundant 10GE

Backbone

mcRNC BCN #2 SCTP -2

sctp2_1 10 .1.8.146/ 28 (gw)

EIPU - 3

SCTP -4

S FP + 1 1

VLAN _Iu _ C2 10 .1 . 8. 130 / 28

sctp1_1 10.1.8.18/28

10 GE

0 /0 / 2

EIPU - 1

VLAN _ Iu _C 2 10 . 1. 8. 129 / 28 R2

Static route to mcRNC 10 . 1. 8. 144 / 28 via 10 . 1. 8. 130

sctp1_1 10.1.8.20/ 28 sctp2_1 10. 1. 8. 148/28

Path to Control Plane 2 network

mcRNC Redundancy cases

Protection Mechanisms • Depending on the Functional Unit (FU) type, specific protection schemes are supported: • FUs in CFPU: 2N protection mechanism in cold-stanby mode for OMU and CFCP. • FUs in CSPU: N+M protection mechanism, then M protecting FUs for N working FUs with M>=1. This is applied to CSCP.

• FUs in USPU: SN+ protection mechanism, then load sharing between USUP units. • FUs in EIPU: 2N protection mechanism, then if an EIPU fails it is protected by another working one.

User Plane Recovery Group

• The QNUP Recovery Group, User Plane • Recovery Group is located to EIPU nodes • Holds the IP addresses terminating the User Plane at IP layer • Terminates the User Plane transport connections from any logical interface from several neighbor nodes • Hot active/standby redundancy scheme for end user connection resilience • QNUP RGs are allocated with the following scheme in order to provide a good basic load distribution (2 QNUP instances per EIPU pair) BCN-1 EIPU-0 EIPU-2

BCN-2 EIPU-1 EIPU-3

Active

Standby

QNUP-0

Standby

Active

QNUP-1

Active

Standby

QNUP-2

Standby

Active

QNUP-3

IuB Control Plane Recovery Group • QNIUB Recovery Group, Iub control plane • • • • •

Recovery Group is located to EIPU nodes Terminates the Iub control plane at IP/SCTP layer Holds the IP addresses terminating the Iub Control Plane at IP layer Cold active/standby redundancy scheme for end user connection resilience Terminates connections from several BTSs

• QNIUB RGs are allocated with the following scheme in order to provide a good basic load distribution (2 QNIUB instances per EIPU pair) BCN-1 EIPU-0 EIPU-2

BCN-2 EIPU-1 EIPU-3

Active

Standby

QNIUB-0

Standby

Active

QNIUB-1

Active

Standby

QNIUB-2

Standby

Active

QNIUB-3

Sigtran Recovery Group • The Iu/Iur control plane traffic SIGTRAN stack processing is located to EIPU nodes • The transport network redundancy is handled with the SCTP multihoming configuration. The service level redundancy and load sharing is handled at M3UA / SCCP layer. • The SCCP layer contains the Hot active/standby redundancy scheme in order to provide full RANAP/RNSAP resilience (QNIU Recovery Group)

BCN-1 EIPU-0 EIPU-2 SCCP

BCN-2 EIPU-1 EIPU-3 SCCP SCCP

SCCP SCCP

SCCP

SCCP

SCCP M3UA SCTP IP A1 IP A2

M3UA SCTP IP B1 IP B2

M3UA SCTP IP C1 IP C2

M3UA SCTP IP D1 IP D2

Multi-homed SCTP Association #1

Multi-homed SCTP Association #2

Multi-homed SCTP Association #3

Multi-homed SCTP Association #4

mcRNC Redundancy cases

• • • •

1. EIPU failure (/BCN failure) 2. SW failure 3. Interface/link failure 4. Router failure (site switch) • Note: Failure cases are presented with one EIPU pair and with one QNUP recovery group instance. In mcRNC deployment there are always two QNUP recovery group instances per EIPU pair and all EIPU nodes have one active Recovery Unit present.

mcRNC OSPF Site Solution OSPF Site Solution: Normal operation OSPF area

BCN 20

EIPU-1 QNUP-1 (Act) IP.4.2 loopback

OSPF Site Solution: 1. EIPU failure (/BCN failure)

Router-2 IP.1.19/28 VL2 IP.1.3/28 VL1

VLAN 2

X

QNUP-1 (Standby)

Router-2 IP.1.19/28 VL2

VLAN 2 IP.1.17/28

IP.1.3/28 VL1

SWO

EIPU-0 QNUP-1 (Standby)

EIPU-1

IP.1.17/28

VL3

BCN 10

OSPF area

BCN 20

VL3

BCN 10

EIPU-0 IP.1.18/28 VL2 IP.1.2/28 VL1

IP.1.1/28 VLAN 1

Router-1

QNUP-1 (Act) IP.4.2 loopback

IP.1.18/28 VL2 IP.1.2/28 VL1

IP.1.1/28 VLAN 1

LSA

Router-1

mcRNC OSPF Site Solution OSPF Site Solution: 2. SW failure

OSPF Site Solution: 3. Interface/Link failure

OSPF area

BCN 20

Router-2

EIPU-1

X

QNUP-1 (Standby)

IP.1.19/28 VL2 IP.1.3/28 VL1

VLAN 2 IP.1.17/28

SWO

VL3

BCN 10

EIPU-0 QNUP-1 (Act) IP.4.2 loopback

OSPF area

BCN 20

EIPU-1 QNUP-1 (Act) IP.4.2 loopback

LOS

X

IP.1.19/28 VL2 IP.1.3/28 VL1

Router-2 VLAN 2 IP.1.17/28

VL3

BCN 10

EIPU-0 IP.1.18/28 VL2 IP.1.2/28 VL1

LSA

IP.1.1/28 VLAN 1

Router-1

IP.1.18/28 VL2 QNUP-1 (Standby) IP.1.2/28 VL1

IP.1.1/28 VLAN 1

Router-1

mcRNC OSPF Site Solution OSPF Site Solution: 4. Router / Site switch failure OSPF area

BCN 20

EIPU-1 QNUP-1 (Act) IP.4.2 loopback

LOS

Router-2

X

IP.1.19/28 VL2

The OSPF failure cases is the same with 1GE and 10GE shared crossed connectivity model

VLAN 2 IP.1.17/28

IP.1.3/28 VL1

EIPU-3 EIPU-1

BCN 10

LSA

VL3

EIPU-2

EIPU-0 EIPU-0 IP.1.18/28 VL2 QNUP-1 (Standby) IP.1.2/28 VL1

LSA

IP.1.1/28 VLAN 1

Router-1

10GE

mcRNC O&M L3 Static routes / OSPF • Redundancy cases • 1. CFPU failure (/BCN failure) • 2. SW failure • 3. Interface/link failure • 4. Router failure (site switch) • The similar redundancy principles apply for both static routes and OSPF configuration options.

mcRNC O&M L3 O&M L3: Normal operation

O&M L3: 1. CFPU failure (/BCN failure)

BCN 20

BCN 20

SSH-0 (Standby)

Router-2 IP.1.18/30 VL2

VLAN 2 IP.1.17/30

VL3

BCN 10

CFPU-0 SSH-0 (Act) IP.10.10 loopback

CFPU-1

IP.1.2/30 VL1

VLAN 1

Router-1

IP.1.18/28 VL2

VLAN 2 IP.1.17/28

VL3

BCN 10

CFPU-0 IP.1.1/30

Router-2

SSH-0 (Act) IP.10.10 loopback

SWO

CFPU-1

X

SSH-0 (Standby)

IP.1.1/28 IP.1.2/28 VL1

VLAN 1

Router-1

mcRNC O&M L3 O&M L3: 2. SW failure

O&M L3: 3. Interface/Link failure

BCN 20

BCN 20

CFPU-1

Router-2

SSH-0 (Act) IP.10.10 loopback

IP.1.18/30 VL2

VLAN 1

SSH-0 (Act) IP.10.10 loopback

SWO

IP.1.17/30

VL3

BCN 10

CFPU-0

LOS

CFPU-1

X

IP.1.18/30 VL2

Router-2 VLAN 1 IP.1.17/30

VL3

BCN 10

CFPU-0

X

SSH-0 (Standby)

IP.1.1/30 IP.1.2/30 VL1

VLAN 1

Router-1

IP.1.1/30 SSH-0 (Standby)

IP.1.2/30 VL1

VLAN 1

Router-1

mcRNC O&M L3 O&M L3: 4. Router / Site switch failure BCN 20

EIPU-1 SSH-0 (Act) IP.10.10 loopback

LOS IP.1.18/30 VL2

Router-2 VLAN 1

X

IP.1.17/30

VL3

BCN 10

EIPU-0 IP.1.1/30 SSH-0 (Standby)

IP.1.2/30 VL1

VLAN 1

Router-1

Thank You !