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Copyright 2006 Nortel, All Rights Reserved
Printed in France
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Nortel UMTS RNC Capacity Roadmap
Document number: UMT/PLM/INF/004862Document issue: V01.08/ENDocument status: StandardDate: May 29th, 2006
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PUBLICATION HISTORY
21/OCT/2002
Issue 01.01 / EN. Creation of Document (previously called V01)08/NOV/2002
Issue 01.02 / EN. Approved version for account distribution after internal review.
(Previously called V02)
19/NOV/2002
Issue 01.03 / EN. Editorial and minor changes.
29/AUG/2003
Issue 01.04 / EN. Editorial and minor changes. Additional details provided on UA02
capacity validation and RNC 2500. Change to Video Telephony AF.
12/JAN/2004
Issue 01.05 / EN. Revised UA03 capacity. Incorporated new connectivity options.
9/JULY/2004
Issue 01.06 / EN. UA04 capacity baseline. Introduce Nortel UMTS RNC 1500,
Enhanced RNC 2500 Market Models, Minor Corrections.
20/May/2005
Issue 01.07 / EN. UA04.1 capacity baseline. Capacity improvements, Introduce Nortel
UMTS RNC 1500 Multi-shelf, Mixed capacity Profile, Minor Corrections.
07/Nov/2005
Issue 01.07b / EN. UA04.1 capacity baseline. RNC 2500 in UA05.
06/Feb/2006
Issue 01.08 / EN. UA04.2 capacity baseline.
29th/May/2006
Issue 01.08b / EN. UA04.2 capacity baseline. Update to reflect UA05 PoR. Minor
corrections.
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CONTENTS
TABLES................................................................................................................................................5
1. INTRODUCTION .........................................................................................................................6
1.1. OBJECTIVE ............................................................................................................................6
1.2. SCOPE OF THIS DOCUMENT .....................................................................................................6
1.3. RNC1500OVERVIEW............................................................................................................7
2. ASSUMPTIONS AND METRICS.................................................................................................8
2.1. CALL PROFILE ASSUMPTIONS ..................................................................................................8
2.2. METRICS .............................................................................................................................10
2.2.1 Traffic Metrics .............................................................................................................11
2.2.2 Coverage Metrics........................................................................................................112.2.3 Connectivity Metrics....................................................................................................11
3. CAPACITY PER SOFTWARE RELEASE.................................................................................12
3.1. UA04.0 CAPACITY................................................................................................................12
3.2. UA04.1 CAPACITY................................................................................................................13
3.3. UA04.2 CAPACITY................................................................................................................13
3.3.1 UA04.2 RNC release BorDEr limits.............................................................................14
4. RNC PHYSICAL CONNECTIVITY OPTIONS ...........................................................................16
4.1. RNCCONNECTIVITY BY UARELEASE ....................................................................................17
5. RNC SCALABILITY ..................................................................................................................18
6. UA04.2 FEATURES IMPACT....................................................................................................20
7. RNC CAPACITY EVOLUTION..................................................................................................21
7.1. RNC1500 AND 2500CAPACITY ...........................................................................................21
ABBREVIATIONS...............................................................................................................................23
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TABLES
Table 1: Traffic parameters per Uni-service.......................................................................................... 8
Table 2 Traffic parameters for RNC service-mix profile ........................................................................ 9
Table 3 Traffic parameters for RNC service-mix profile Cont. from Table 2 ....................................... 9
Table 4 Signalling parameters Common to all call profiles............................................................... 10
Table 5 Signalling parameters RNC service-mix profile only........................................................... 10
Table 6: RNC 1000 Capacity with UA04 software.............................................................................. 12
Table 7: RNC 1000 and 1500 Capacity with UA04.1 software ........................................................... 13
Table 8: RNC 1000 and 1500 Capacity with UA04.2 software ........................................................... 14
Table 9 RNC PCM Connectivity Options for All Market regions except North America....................... 16
Table 10 RNC MSS PoC Connectivity Options for All Market regions except North America ............. 16
Table 11 Connectivity Options for North American Market Regions ................................................... 16
Table 12: Summary of RNC 1000 Scalability...................................................................................... 18
Table 13: Summary of RNC 1500 Scalability...................................................................................... 18
Table 14 RNC 1000 and 1500 Optional Features Capacity Impacts ................................................... 20
Table 15: Summary of RNC 2500 Capacity per configuration............................................................. 22
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1. INTRODUCTION
1.1. OBJECTIVE
Nortel UMTS RNC Capacity Roadmap provides product capacity commitments on a
per release basis, based on a set of capacity metrics for Nortel defined Speech,
Mobile Office Internet (i.e. PS 64/128 I/B), an R99 service-mix and HSDPA service-
mix capacity profiles only. Capacity figures for the other service profiles are provided
for example purposes only and are subject to change. A capacity commitments
validation report is available for every UMTS Access release comparing the RNC
capacity commitments with the actual measured capacity. The UA04.2 validation
report is available now and shows that Nortel RNC meets capacity commitments.
Nortel uses the following criteria to formulate the capacity commitment of the RNC
1000 & 1500:
Scenarios must be verifiable either in a lab or in the field
Capacity metrics chosen based on their suitability for network engineering
The Capacity Commitments Validation report provides the following benefits:
Full and Comprehensive visibility of RNC capacity:
The test report gives a comprehensive view of Nortels RNC capacity in
loaded conditions for a given release.
A transparent commitment from Nortel:
The capacity committed is directly comparable to the actual measured
capacity in Nortels labs. This ensures that Operators can hold Nortel
accountable for the capacity we commit to on the RNC.
Continuity of capacity commitment:
Each release of the capacity test report will contain the same capacity metrics,
guaranteed to be verified in identical conditions and formatted to allow simple
comparisons against capacity commitments for this release and results from
previous release(s).
Capacity Achievements in live networks
Each release Nortel will share the major capacity achievements obtained in
live network deployments.
1.2. SCOPE OF THIS DOCUMENT
Nortel RNC Capacity Roadmap provides RNC product capacity commitments on a per
release basis. The baseline release for this document is UA04.2 release. This
document describes the assumptions and environment under which the Nortel RNC
achieves a specific capacity. It also highlights which tests will be executed to ensure
that capacity commitments are achieved once the relevant software release is
available.
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1.3. RNC 1500 OVERVIEW
The RNC 1500 is based on the Multi-Service Switch (MSS) platform and is available
from UA04.1. The RNC 1500 is functionally equivalent to the RNC 1000 i.e. same
feature content, capacity, performance and reliability; but occupies 50% less cabinet
space than the RNC 1000 SDH & SONET models. The RNC 1000 will bemanufactured discontinued in June 2006.
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2. ASSUMPTIONS AND METRICS
2.1. CALL PROFILE ASSUMPTIONS
Nortel are introducing an RNC service-mix profile to provide a view of RNC capacity
with a mix of different CS and PS services. In particular, the RNC service-mix profile is
designed to stimulate current and future RRM features, which can be verified in
Nortels test environment. It is not intended to model real network call profiles that
evolve continuously over time. The RNC service-mix profile definition will remain
stable release over release for comparison purposes, like the Speech and Mobile
Office Internet Uni-service profiles. In UA04.2, Nortel provides a commitment and
issues a capacity validation report for the RNC R99 and HSDPA service-mix profiles
also. In both call profiles the PS services are the same, but an HSDPA bearer is used
instead of dedicated RB in the downlink.
Nortel RNC capacity commitments are based on a set of call profile assumptions perservice. Call profiles are described by traffic parameters per service and service
independent signalling parameters. However, in order to trigger different RRM
features additional signalling parameters are defined for the RNC service-mix profile.
The following tables describe the Uni-service and RNC service-mix profile
assumptions:
Uni-Service Call Profile assumptions Traffic parameters
RAB
DownlinkActivityFactor
UplinkActivityFactor
Mean Callduration(second) BHCA
MobileTerminated
Calls Typical Service
CS Conv. 12,2 AMR 50% 50% 90 1 44% Speech
CS Conv. 64 100% 100% 180 0.3 50% Video Telephony
PS I/B 64/64 50% 5% 85 0.3 0% Basic browsingPS I/B 64/128 50% 10% 75 0.3 0% Mobile office Internet
PS I/B 64/128 90% 20% 200 0.3 0% Video streaming
PS I/B 64/64 90% 10% 220 0.3 0% Audio streaming
PS I/B 64/384 50% 10% 75 0.3 0% Mobile office Premium
Table 1: Traffic parameters per Uni-service
Table 1 Notes:
Each service assumes that 100% of the traffic is generated using only this
service. Note that in reality, there will be a mixture of services.
BHCA per attached Subscriber is 1 for speech, the same as the NUSCM.
However, NUSCM considers a low BHCA for each data service (CS or PS)since all services are running in parallel in a service-mix profile. In the Uni-
service profiles, data services are run in isolation. Therefore, BHCA for each
data service has been set to 0.3 in order to make each all data scenario
significant and comparable.
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RNC Service-mix Call Profile assumptions Traffic parameters
RAB
DownlinkActivityFactor
UplinkActivityFactor
Sessionduration(second)
Iu Conn.Duration(second) BHCA Typical Service
CS Conv. 12,2 AMR 50% 50% 90 90 1 Speech
CS Conv. 64 100% 100% 240 240 0.11 Video Telephony
PS I/B 64/6440% R992.4% HS 10% 232 272 0.43 Basic browsing
PS I/B 64/12830% R993.8% HS 10% 90 130 0.43 Mobile office Internet
PS I/B 64/38420% R997.5% HS 10% 100 140 0.29 Mobile office Premium
CS Conv. 12,2 AMR 50% 50% 120 120 0.002 Emergency Calls
Table 2 Traffic parameters for RNC service-mix profile
Table 2 Specific Notes:
Session Duration is the time from the first to last user packet transmission.
Iu connection duration time = Session duration + AlwaysOn TimerT1 (downsize
timer) + AlwaysOn TimerT2 (Iu release timer). PS I/B calls are assumed to end
due to T2 timeout and RNC initiated release.
HSDPA RNC service-mix profile uses HSDPA in the Downlink for PS services,
rather than R99 dedicated bearers. e.g. R99 PS I/B 64/64 is HSDPA PS I/B
64/HSDPA.
Note as HSDPA bearers have higher peak rates than R99 DCH bearers, the AFs
for HSDPA are different (in DL only). HSDPA AFs are denoted as HS in Table 2.
Corrected session duration error (250s to 240s) for CS Conv. 64Kbps RAB.
RNC Service-mix Call Profile assumptions Traffic parameters Cont.
RAB CompressedMode
Mobile
TerminatingCalls
#Pauses /Pause
Duration(second)
Bad Radio
Events persession Typical Service
CS Conv. 12,2 AMR 10% 44% 0 0 Speech
CS Conv. 64 0% 50% 0 0 Video Telephony
PS I/B 64/64 0% 0% 4/38s 0.1 Basic browsing
PS I/B 64/128 0% 0% 4/5s 0.1 Mobile office Internet
PS I/B 64/384 0% 0% 2/15s 0.1 Mobile office Premium
CS Conv. 12,2 AMR 0% 0% 0 0 Emergency Calls
Table 3 Traffic parameters for RNC service-mix profile Cont. from Table 2
Table 3 Specific Notes:
Compressed mode represents the % of 3G calls per busy hour that terminate with
a Hard Handover to 2G.
Number of pauses per session and the average pause duration simulates long
intra session periods of inactivity in data applications. These pauses may result in
a change to/from the downsized/nominal state.
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Call Profile assumptions (common to all services) Signalling parameters
Parameter Value Comments
IMSI attach0.17 (CS)0.27 (PS)
Per attached subscriber during busy hour
IMSI detach
0.14 (CS)
0.08 (PS)
Per attached subscriber during busy hour
This includes UE and network initiatedLocation Area Update 1.25 (CS) Per attached subscriber during busy hour
Routing Area Update 0.65 (PS) Per attached subscriber during busy hour
% attached subscribers70% (CS)80% (PS)
Percentage of reference subscribers attached to thenetwork
1.3 Average Sector per User in Cell DCH stateMacro Diversity (R99only)
0.1Active Set Update rate. This means 1 radio link additionOR one radio link deletion every 10 seconds
6 UMTS Cells per RRC Measurement ReportRRC Measurements
0.75 MR/sec per subscriber in cell-DCH state
1.5 CN paging request repetition factorPaging Repetition
1 UTRAN Paging repetition factor (means 1 transmission)
RLC Retransmission 10% Due to Block Error Rate
Table 4 Signalling parameters Common to all call profiles.
Call Profile assumptions (common to all services) Signalling parameters
Parameter Value Comments
Cell Update (R99 only) 0.03 (PS) Per second in Cell FACH state
NBAP MR rate (R99Only)
1 Dedicated MR per iRM upgrade
Compressed Mode Cellsper RRC MR
6+6 UMTS+GSM
iRM scheduling events(R99 only)
Assume 10% of PS sessions experience badRadio conditions once per session
PS Session termination RNC always terminates due to T2 Always-On time-out
Table 5 Signalling parameters RNC service-mix profile only
The assumptions proposed in these tables are realistic assumptions based on Nortels
extensive field experience in live GSM, CDMA and IP networks:
The signalling parameter values are taken from Nortel UMTS Standard Call Model
(NUSCM), which is an average of the call profiles observed or anticipated on
various networks.
All traffic and signalling values are for attached subscribers.
These signalling parameters apply to both R99 and HSDPA mixed profiles, unless
stated otherwise e.g. Macro diversity (in DL) does not apply to HSDPA PS
services.
2.2. METRICS
The RNC capacity is defined in three dimensions:
- traffic
- coverage
- connectivity
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These dimensions are independent, thus the RNC capacity is determined by the most
constraining limit. Nortel uses the following Metrics to quantify the capacity of the
RNC:
2.2.1 TRAFFIC METRICS
Iu Mbit/s UL+DL at application layer
oThis metric is defined as the sum of UL and DL traffic on Iu-CS and Iu-PS
interfaces, at the application layer.
Iu Mbit/s UL+DL at physical layer
oThis metric is defined as the sum of UL and DL traffic on Iu-CS and Iu-PS
interfaces, at the physical layer. This figure is always greater than the
application layer throughput.
Reference Subscriber
oThis metric is the total number of subscribers located under the coverage of
that RNC.
Simultaneous TRB subscribers (or Erlangs for CS domain)
oThis metric represents the amount of simultaneous subscribers with a Traffic
Radio Bearer assigned. Note that in case of CS Services, this is
equivalent to the Erlang metric.
2.2.2 COVERAGE METRICS
Number of Node B
oThis is the number of Node Bs that can be under a single serving RNC.
Number of Cells
oThis is the number of cells that one serving RNC can support. A cell is
defined as one carrier in one sector; for instance, a S222 contains 6 cells.
2.2.3 CONNECTIVITY METRICS
Number of E1/DS1
oThis is the number of E1/DS1 links that the RNC can terminate.
Number of STM1/OC3
oThis is the number of STM1 or OC3 links that the RNC can terminate.
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3. CAPACITY PER SOFTWARE RELEASE
This section provides the capacity per UMTS Access (UA) software release. These
capacity commitments are based on: A maximum RNC Configuration i.e.
o RNC 1000: 14 TMU-Rs and 12 Packet Servers
o RNC 1500: 12 Packet Servers
Apply to all physical RNC connectivity options e.g. E1, STM1, OC3
Capacity commitments, shaded in green are for Speech and Mobile office
internet (PS 64/128 I/B RB) service profiles only for UA04.1 and prior
releases. From UA04.2, Nortel also supports capacity commitments for an
RNC R99 and HSDPA service-mix profiles.
Capacity figures for the other service profiles are provided as examples.These are not commitments from Nortel and are subject to change.
3.1. UA04.0 CAPACITY
The capacity commitments for Nortel UMTS RNC 1000 for UA04.0 release are
provided in Table 6.
Service & Bearer Capacity of RNC 1000
Iu Mbit/s Reference
RAB Typical Service
Iu Mbit/sApplication Layer
PhysicalLayer Subscribers
SimultaneousTRB
subscribers
CS Conv.12,2AMR Speech 49 83 220 000 3900
CS Conv. 64 Video Telephony 170 205 130 000 1300
PS I/B 64/64 Basic browsing 85 105 400 000 2200
PS I/B 64/128 Mobile office Internet 140 170 400 000 2000
PS I/B 64/128 Video streaming 240 300 140 000 1900
PS I/B 64/64 Audio streaming 200 240 210 000 3100
PS I/B 64/384 Mobile office Premium 225 270 230 000 1100
Table 6: RNC 1000 Capacity with UA04 software
Notes:
These are the capacity figures for RNC 1000 UA04.0 General Availability
(GA).
Capacity commitments of Speech and Mobile Office profiles are unchanged.
UA04.0 Capacity Validation notes:
The capacity figures in green coloured cells have been measured during
capacity tests and included in the UA04.0 capacity commitments validation
report.
RNC capacity validation improvements :
o Increased call model coverage i.e. new signalling procedures
implemented.
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o Model more closely reflects typical Node B deployment
o Improved accuracy in the U-plane traffic generation.
3.2. UA04.1 CAPACITY
The capacity commitments for UA04.1 release are provided in
Table 7.
Service & Bearer Capacity of RNC 1500 & RNC 1000
Iu Mbit/s Reference
RAB Typical Service
Iu Mbit/sApplication Layer
PhysicalLayer Subscribers
SimultaneousTRB
subscribers
CS Conv.12,2AMR Speech 49 83 220 000 3900
CS Conv. 64 Video Telephony 160 190 120 000 1200
PS I/B 64/64 Basic browsing 100 130 470 000 2700
PS I/B 64/128 Mobile office Internet 176 217 500 000 2500
PS I/B 64/128 Video streaming 240 300 140 000 1900
PS I/B 64/64 Audio streaming 200 240 210 000 3100
PS I/B 64/384 Mobile office Premium 225 270 230 000 1100
Table 7: RNC 1000 and 1500 Capacity with UA04.1 software
Notes:
These are the capacity figures for UA04.1 General Availability (GA).
RNC 1500 was introduced in UA04.1.
Capacity commitment for the Mobile Office profile was increased in UA04.1
i.e. new commitment is 176 vs original 140 Mbps.
Capacity commitment of Speech profile is unchanged at 3900 Erlangs.
RNC service-mix profile is a capacity commitment from UA04.2.
UA04.1 Capacity Validation notes:
The capacity figures in green coloured cells have been measured during
capacity tests and included in the UA04.1 capacity commitments validation
report, which is available.
3.3. UA04.2 CAPACITY
The capacity commitments for UA04.2 release are provided in Table 8.
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Service & Bearer Capacity of RNC 1500 & RNC 1000
Iu Mbit/s Reference
RAB Typical Service
IuMbit/s
Application
Layer
Physical
Layer Subscribers
SimultaneousTRB
subscribers
CS Conv.12,2AMR Speech 49 83 225 000 3900
CS Conv. 64 Video Telephony 140 180 100 000 1100
PS I/B 64/64 Basic browsing 110 130 530 000 3000
PS I/B 64/128 Mobile office Internet 176 217 500 000 2500
PS I/B 64/128 Video streaming 220 270 130 000 1700
PS I/B 64/64 Audio streaming 130 160 140 000 2100
PS I/B 64/384 Mobile office Premium 220 260 220 000 1100
R99 RABs R99 Service-mix 88 120 49 000 2500
R99 & HSDPA RABs HSDPA Service-mix 88 120 49 000 2500
Table 8: RNC 1000 and 1500 Capacity with UA04.2 software
Notes:
These are the capacity figures for UA04.2 General Availability (GA).
RNC HSDPA and R99 service-mix profiles are capacity commitments from
UA04.2.
UA04.2 Capacity Validation notes:
The capacity figures in green coloured cells have been measured during
capacity tests and included in the UA04.2 capacity commitments validation
report, which is now available.
3.3.1 UA04.2 RNC RELEASE BORDER LIMITS
Border limits define the maximum operating range of the RNC for a given release i.e.
the maximum capacity figures that cannot be exceeded irrespective of call profile.
The following border limits exist on the RNC:
310Mbps Iu DL throughput on the current 16pOC3/STM1 (PQC based) Card.
o A new version of the 16pOC3/STM1 (MS3 based) is being introduced
in UA05 that supports line rate (upto 2.5Gbps) IP forwarding.
o Nortel are increasing this border limit from 220Mbps to 310Mbps and
aligns with the MSS engineering recommended IP forwarding limit for
this card.
A fully configured UA04.2 RNC 1000 and 1500 can support a maximum of
9600 (UA04.1 = 7200) RRC contexts. The following is a breakdown of the
different RRC contexts pools:
o Max number of CS RRC contexts: 6048 (UA04.1 = 4320)
o Max number of PS RRC contexts: 8640 (UA04.1 = 3600)
o Max number of UE RRC contexts: 9600 (UA04.1 = 4620)
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o Max number of FACH RRC contexts: 6720 (UA04.1 = 2400)
In UA05.0, Nortel plan to introduce CELL_PCH and URA_PCH RRC context
states. Nortel plan to support
o Max number of CELL_PCH RRC contexts: 7020
o Max number of total CELL_PCH and URA_PCH RRC contexts:
32,040.
o Max number of FACH RRC contexts: 7020 (UA04.2 = 6720).
o All other UA04.2 RRC context pools remain unchanged.
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4. RNC PHYSICAL CONNECTIVITY OPTIONS
The RNC is based on the industry leading MSS Platform. The MSS portfolio supports
numerous different interface options, not all of which are applicable to a UTRANsystem. Nortel adds new connectivity options to our RNC product every release.
This section provides the capacity in terms of links & ports for each available
connectivity option. Each connectivity option supports the same processing capacity in
terms of Erlangs, Subscribers, and Mbps etc. as per section 3.
w/o IMA IMA
MSA32 DS 32 Electrical 6+1 7K210
(30 * 7 FP)
Upto UA04.1
154 (22 * 7 FP)
from UA04.2
196 (28 * 7 FP)
8+8 (RNC 1000)
9+9 (RNC 1500)UA01
MSA32 SS 32 Electrical 6+1 7K 210(30 * 7 FP)
Upto UA04.1
154 (22 * 7 FP)UA04.2
196 (28 * 7 FP)
8+8 (RNC 1000)9+9 (RNC 1500) avail 2005
Clear Channel SS 16 Optical 1+1 None _ _
In SDH config
15+15 (RNC 1000)
16+16 (RNC 1500)
UA01
Channelized DS 2 Electrical 2+2 7K 228 2528+8 (RNC 1000)
9+9 (RNC 1500)UA04.1
Connectivity Option Max. RNC Configuration RNC Connectivity Capacity
E1
STM1E1s
Interface VariantSingle Slot/
Double Slot# ports
MSS7K
(if required)
Optical/
Electrical# FPs
Interface
Availability
STM1
Table 9 RNC PCM Connectivity Options for All Market regions except NA
w/o IMA IMA
MSA32 DS 32 Electrical 6+1 7K 210(30 * 7 FP)
Upto UA04.0
154 (22 * 7 FP)from UA04.1
196 (28 * 7 FP)
8+8 (RNC 1000)9+9 (RNC 1500)
UA01
MSA32 SS 32 Electrical 9+2 7KFrom UA04.1
330 (30 * 11 FP)
From UA04.1
308 (28 * 11 FP)
8+8 (RNC 1000)
9+9 (RNC 1500)avail 2005
Clear Channel SS 16 Optical 1+1 None _ _
In SDH config
15+15 (RNC 1000)
16+16 (RNC 1500)
UA01
Clear Channel SS 4 Optical 6+6 15K _ _ 24+24PCR 5.2
(Min)
Channelized DS 2 Electrical 2+2 7K 228 2528+8 (RNC 1000)
9+9 (RNC 1500)UA04.1
Channelized SS 2 Optical 5+5 7K 570 6308+8 (RNC 1000)
9+9 (RNC 1500)
PCR 7.1
(min)
STM1
PoC
(if required)
E1sSTM1
E1
Connectivity Option Max. RNC Configuration RNC Connectivity Capacity
Interface
AvailabilityInterface Variant
Single Slot/
Double Slot# ports
Optical/
Electrical# FPs
Table 10 RNC MSS PoC Connectivity Options for All Market regions except NA
w/o IMA IMA
DS3 Channelized SS 4 Electrical 8 + 2 15K896
(112 * FP)
896
(112 * FP)
8+8 (RNC 1000)
9+9 (RNC 1500)UA03
OC3 Clear Channel SS 16 Optical1+1 (RNC)
4 (PoC)15K _ _
15+15 (RNC 1000)
16+16 (RNC 1500)
64 (AN)
UA01
RNC Connectivity Capacity
Interface
AvailabilityInterface Variant
Single Slot/
Double Slot
PoC
(if required)# ports
Connectivity Option Max. RNC Configuration
Optical/
ElectricalOC3
DS1s# FPs
Table 11 Connectivity Options for North American Market Regions
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Notes
The maximum number of interfaces a single connectivity option can support is
provided. Nortels RNC is very scalable and allows for smaller configurations.
Connectivity options are segregated, i.e. North America and all other regions.
MSS7K can be deployed as part of the RNC 1500 PCM configuration or as a
Point of Concentration in UA04.1 or UA04.2.
In #FP column the redundancy scheme is provided e.g. 6+1 implies 6 active
cards and 1 spare card.
Max number of E1s with MSA32 card are for unspared MSS7K configurations
4.1. RNC CONNECTIVITY BY UA RELEASE
The new connectivity options introduced in UA04.1 are
o
The single slot MSA32 card available from year end 2005o This is the same card as the current double slot MSA32, but occupies
a single card slot only.
o The STM1 electrical Channelised card is a 2 port card and supports ATM and
IMA services.
o RNC 1500 has an additional port over RNC 1000 because a port is no longer
required for the CNode platform.
o Support for a 2pSTM1/OC3 card in the MSS7K PoC and Access Nodes;
MSA32-STM1 card is being MDd in June 2006 as this will not be made RoHS
compliant.
The new connectivity options that introduced in UA04.2 are
o Support for 28E1s with IMA per MSA32 card on the RNC PCM configuration
o 2ptSTM1o ch card in the MSS7K PoC (min PCR 7.1 release)
o Support for Y-splitter functionality on the 16ptOC3/STM1 card, which enables
equipment (not line) protection even though there is only a single fiber.
The new connectivity options planned for UA05 are
o Nortel plan to MD the RNC 1500 PCM configuration from UA05 and only
support PoCs.
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5. RNC SCALABILITY
In previous sections, Nortel RNC capacity was quoted based on the maximum
configuration. However, Nortel RNC is a very scalable platform, and can be configuredto meet different network capacity needs.
Table 12 and Table 13 show the main dimensioning metrics for the RNC scalability
models. The new connectivity options being introduced in UA04 and beyond will
provide similar scalability.
RNC 1000 Market ModelsUA
ReleaseS4-4-0P4-4-3
PCM OnlyP6-6-5
S7-7-0P9-7-5
S11-10-0P12-10-7
S14-12-0P14-12-7
Node B 80 120 140 200 200
Cells 360 600 7201080 (S)
1200 (P) 1200
Speech (RB CSConv.12,2AMR)Erlangs orSimultaneous TRBs
UA04.x 980 16002000 (S)2300 (P)
2900 (S)3300 (P)
3900
UA04.0 36 6072 (S)84 (P)
108 (S)120 (P)
140Mobile Office Internet(RB = PS I/B 64/128)Iu App. Throughput (Mbit/s) UA04.x
(x= 1 or 2)44 73
88 (S)103 (P)
132 (S)147 (P)
176
RNC R99 & HSDPAService Mixed ProfileSimultaneous TRBs
UA04.2 625 10401250 (S)1460 (P)
1880 (S)2080 (P)
2500
Table 12: Summary of RNC 1000 Scalability
RNC 1500 Market Models1504 1506 1507 1510 1512
Node B 80 120 140 200 200
Cells 360 600 720 1200 1200
Speech(Erlangs)
980 1600 2000 3300 3900
Mobile Office InternetIu App. Throughput (Mbit/s)
44 73 88 147 176
RNC R99 & HSDPAService Mixed Profile
Simultaneous TRBs
625 1040 1250 2080 2500
Table 13: Summary of RNC 1500 Scalability
Notes:
For more details about the definition of the metrics and assumptions used to
compute these figures please refer to previous section 3 Capacity per
software Release
S refers to RNC SONET configuration in North America, whereas S refers to
SDH for all other market regions. P stands for PCM in the table.
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- This notation only refers to RNC 1000. The RNC 1500 also supports
SONET, SDH and PCM configurations but does not include this
notation in the naming;
The available RNC 1500 Market Models are provided below. The model
naming uses the last 2 digits (i.e. RNC 15XX) to refer to the number of Packet
Servers. MSA32 cards are required for RNC 1500 PCM models only.
RNC 1500 Market Models1504 1506 1507 1510 1512
PS 4 6 7 10 12
MSA32 3 5 5 7 7
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6. UA04.2 FEATURES IMPACT
In general, Nortel includes most of the base and optional features in the capacity
calculation. This means that the capacity given in this document assumes that most ofthe features are enabled in the network. However, the following exceptions should be
noted:
1- Nortel assumes that the parameter setting is within a reasonable range. For
instance, setting always-on timers or handover threshold outside of this range can
cause additional procedures and degrade RNC Capacity.
2- When implementing new features in future software releases, there is always the
possibility that a feature(s) may degrade the RNC capacity. While every effort will
be made to ensure there is no degradation in capacity over a previous release,
Nortel will notify operators before the customer readiness milestone and quantify
the capacity degradation.
3- The capacity communicated in this document assumes that features that are
specifically designed to optimize or commission a network are turned-off. This is
the case for call trace and OCNS.
In UA04.2, there are two optional features that have an impact on RNC capacity i.e.
Silent Mode (SM) and Full Event Triggered Measurement Reports (fETMR), which
replaces Partial Event Triggered Measurement Reports. The following table highlights
the impact of these optional features on RNC 1000 and 1500 capacity.
RNC 1000 14-12 RNC 1512Feature Impact
Erlangs Mbps Erlangs Mbps
RNC Base Capacity (No SM, no ETMR) 2630 153 2730 158
Silent Mode Only Enabled 2630 153 2730 158
Full ETMR Only Enabled 3900 176 3390 172
Silent Mode and Full ETMR Enabled 3900 176 3900 176
Table 14 RNC 1000 and 1500 Optional Features Capacity Impacts
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7. RNC CAPACITY EVOLUTION
Nortel Networks RNC 2500 is the next generation RNC and is planned in UA06
release.
Figure 1 RNC capacity roadmap
The key benefits of this product for a customer are:
Increased number of Node B per RNC
This will allow the expected network expansion and densification without
additional RNCs.
Increased number of Mbit/s per RNC
The added Mbit/s will absorb traffic growth without having to install new RNCs.
Increased number of subscribers per RNC
The 3G-subscriber base will grow and the RNC can absorb this growth without
having to install new RNCs.
Reduced operational costs thanks to a smooth upgrade policy
The evolution from Nortel Networks RNC to Nortel Networks RNC 2500 is
achieved through a software upgrade and (optionally) simple upgrade of FRU
(Field Replaceable Units). No forklift is required.
The current platform also allows a second step upgrade by addition of NextGeneration PSFPs, without requiring a forklift of the cabinet. This is a candidate
feature for UA06.
7.1. RNC 1500 AND 2500 CAPACITY
The capacity of RNC 2500 and NGPS is presented in the table below:
UA04.1UA04.1
RNC 1500 RNC 2500
ORBiT
Optional
NGPS3
2X2X
UA06UA06
RNC 2500
+
UA06UA06
Hitless Patching
Single PlatformIncreased Density
2X Capacity Increase
OPEX reduction
2X capacity
PS Mixity
Highlights
Optional Optional
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Node B 200 160 240 280 400 400 800 720
Cells 1200 720 1200 1440 2400 2400 4800 3600
STM1/OC3 16 16 16 16 16 16 16 16
Speech
(Erlangs)
3,900 2,000 3,200 4,000 6,600 8,000 16000 9600
Mobile Office Internet
Iu App. Throughput (Mbit/s)176 88 146 176 294 352 704 438
RNC 2512
6 NGPS
+ 6 PS1
RNC 1512
Max Config.RNC2504 RNC 2506 RNC 2510
RNC 2512
Max Config.
RNC 2512
with NGPSRNC 2507
Table 15: Summary of RNC 2500 Capacity per configuration
Notes:
RNC 2500 supports the same Market Models as RNC 1500
RNC 2500 uses same model naming convention as RNC 1500
o The RNC 2512 is a fully populated RNC with 12 Packet Servers.
Given that we are only at the early stage of the project, the capacity of these
models are guidelines only and subject to change as development
progresses.
RNC 2500 with Next Generation PSFP doubles RNC 2500 capacity.
RNC 2500 shall support a single mixity configuration of 6 current PSs and 6
next generation PSs.
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ABBREVIATIONS
2.5G 2.5 Generation Wireless Network
2G 2nd Generation Wireless Network
3G 3rd
Generation Wireless Network
AF Activity Factor
AN Access Node
BHCA Busy Hour Call Attempts
DL Downlink
DS Refers to an interface card that occupies a double slot in the shelf
FRU Field Replaceable Units
NGPS Next Generation Packet Server
NUSCM Nortel UMTS Call Model
RNC Radio Network Controller
SR Strategic Readiness
SS Refers to an interface card that occupies a single slot in the shelf
UA UMTS Access release.
UL Uplink
TRB Traffic Radio Bearer
END OF DOCUMENT