03 - WCDMA RAN Architecture and Products Rev A.ppt

RAN Architecture and
Products
Gopichand Kongara
Technical Solutions Manager

Commercial in confidence RAN Architecture and Products 2005-09-26
2
Agenda
 Introduction
 RBS
 RNC
 Transport/RXI

3
WCDMA Radio Access Network

4
Agenda
 Introduction
 RBS
 RNC
 Transport/RXI

5
Main-Remote
w. RRU22
Micro
RBS 3303
Outdoor RBS 3106 Macro
Indoor RBS 3206 Macro
Release
2006
RBS models - Overview

6
RBS 3206 Macro Indoor
Radio
 1x1 to 3x3 @ 40 W per carrier
 Dual Band
 Output Power: 20 to 80 W configurations
 Channel Element: UL/DL 1536/1536 CE
 Tx-diversity, 4-way RX-diversity
 HSDPA
 Prepared for Enhanced Uplink
Transport
 Up to 40 E1/T1/J1 ports or 16 STM-1 ports
 IP option
 Hub functionality with AAL2 switching
Size and Weight
 Size: 1950x600x400 mm
 Weight: 150 kg (3x1 config)
Power Supply
 Power Supply: +24, -48 VDC, AC Mains
 Power consumption 3x1 40 W: typ 1.0 kW

7
Connection plates
for external signals
98
FCU
DC-filt/
DCCU
24
ACCU/
DCCU
48
P
D
U
2
B
P
P
P
P
P
F
U
1
F
U
2
F
U
3
F
U
4
F
U
5
F
U
6
PSUPSUPSUPSU
AUH
R
U
9
R
U
7
R
U
8
C
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P
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G
P
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T
X
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R
U
I
F
Cable shelf
P
D
U
1
R
U
1
R
U
2
R
U
3
R
U
4
R
U
5
R
U
6
Cable shelf
Filter units
with antenna RF connections
Radio units
Digital shelf for
base-band and
transmission cards
Radio units
Power Supply Unit
Inside RBS 3206

8
RBS 3106 Macro Outdoor
Radio
 1x1 to 3x3 @ 40 W per carrier
 Dual Band
 Output Power: 20W/40 W per carrier
 Channel Element: UL/DL 1536/1536 CE
 Tx-diversity, 4-way RX-diversity
 HSDPA
 Prepared for Enhanced Uplink
Transport
 T1, T3, OC3
 IP option
 Hub functionality with AAL2 switching
Size and Weight
 Size: 63 1/2 x 51 1/5 x 37 in
 Weight (3x1 carrier): 1230 lbs (excl. batt.)
Power Supply
 Power Supply: AC Mains
 Power consumption 3x1 40W: typ 1.7 kW

9
OVP
Battery
Battery
D
u
m
m
y
F
U
1
F
U
2
F
U
3
F
U
4
F
U
5
F
U
6
R
U
1
R
U
2
R
U
3
R
U
4
R
U
5
R
U
6
XALM
PSUPSUPSUPSUBFU
A
U
H
Spare
S
P
A
R
E
cable shelf
C
B
U
E
T
/
G
P
B
E
T
/
G
P
B
R
A
X
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G
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C
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G
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B
T
X
T
X
R
U
I
F
ACCU
F
C
U
R
U
9
P
D
U
1
R
U
7
R
U
8
P
D
U
2
cable shelf
Power Bar
Filter units with antenna
RF connections
Radio units
Digital shelf for
base-band and
transmission cards
Connection field for
external signals
Optional batteries
Power supply units
RF cable inlets
Inside RBS 3106

10
RBS 3303 Micro
 Capacity
– 1 carrier/cabinet at 20W
– Max 256/256 Channel Elements (DL/UL)
 Dimensions
– 15.8 x 13.4 x 22.8 in (WxDxH)
– 95 lbs (incl. batteries)
 Power
– -48 VDC or 100-240 VAC
– Backup Time > 1 Minute (option)
– Power Consumption (AC):
 Peak 750 W (with heater during cold start)
 Typical 350 W

11
Separate channel element Boards for DL and UL
Down Link (DL), or TXB
 Up to 2 Boards in Macro RBS
 DL BB Board = 256 CE-R99 + HSDPA
Up Link (UL), RAXB
 Up to 8 Boards in Macro RBS
 UL BB Board = 128 CE CE
CE
384 kb/s
64 kb/s
Channel Element Boards
CE
Carrier #2 (5MHz)
Carrier #1 (5MHz)
Channel Element (CE) Consumption
CS/PS RAB Downlink Uplink
Speech 1 1
64 Kbps 2 4
128 Kbps 4 8
384 Kbps 8 16

12
Agenda
 Introduction
 RBS
 RNC
 Transport/RXI

13
RNC main tasks in network
• Manage the Radio Access
Bearers for user data transport
• Manage and optimize Radio
Network resources
• Control user mobility

14
The 3 RNC Roles
RNC SRNC
Core Network
Node B Node B Node B Node B
Iu Iu
Iur
Iub Iub
Iub Iub
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UE
UTRAN
SRNS
RNS
SRNC
• Each connected mode UE is
controlled by a Serving RNC
(SRNC)
• The SRNC terminates Iu
towards the CN
• The SRNC terminates Uu L2
UP & CP towards UE
DRNC SRNC
Core Network
Iu Iu
Iur
Iub Iub
Iub Iub
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UE
UTRAN
SRNS
DRNS
Macro
Diversity
Combining/
splitting
function
DRNC
• Inter RNC soft handover requires
a second RNC to be involved
• Such an RNC lending resources
to an SRNC for a specific UE acts
as a Drift RNC (DRNC).
CRNC
• Each RNC acts as
Controlling RNC (CRNC) for
the directly connected Node
B’s and their cells
• The CRNC controls the radio
resources of its cells
CRNC CRNC
Core Network
Iu Iu
Iur
Iub Iub
Iub Iub
UTRAN
RNS
RNS

15
RNC 3810
 RNC subracks housed in BYB 501 cabinet
 Small footprint: Size H x W x D (mm) 1800 x 600 x 400
 No rear or side access required
 Processing capacity increase with new
hardware modules
 Two Subrack Types
 Main
 Extension
 Scalable capacity
 1-6 subracks in 1-2 cabinets
 Only 6 basic board types
 Common platform, CPP
 HW designed for any mix of traffic (CS/PS)
 Hot expansion & repair, Redundant HW and Soft SW upgrade

16
450mm
400
mm
250mm
Cable shelf & air inlet
Fan
CPP Subrack
 Up to 28 boards per subrack
– Two Switch Core Boards (SCBs)
– 15 mm board spacing
– PBA size 225 × 265 mm
 Generic Slots
– 26 general device boards
 19" subrack
– Based on BYB 501
– Hot insertion of boards
– All connectors on board front
– EMC-shielded subracks
– Fan cooled (2 fans)
– Redundant power -48V

17
 GPB – General purpose processor board
…. used to implement the Main Processor
 SPB – Special purpose processor board
…. used to process data streams in the user plane
 SCB – Switch control board
…. ATM switch, inter subrack communication
 SXB – Switch extension board
…. inter subrack communication extension
 TUB – Timing unit board
…. timing reference, system clock
 ETB – transmission interface boards
…. different implementation variants depending on interface type to
support
Boards in the RNC

18
E
T
S
P
B
G
P
B
SCB
SCB
E
T
S
X
B
S
P
B
G
P
B
SCB
SCB
T
U
B
E
T
S
P
B
G
P
B
SCB
SCB
E
T
S
P
B
G
P
B
SCB
SCB
Main subrack Extension
subrack 1
Extension
subrack 2
Extension
subrack n
 Fully redundant HW
 Distributed processing in clusters
 “No impact” on single HW failure
High Availability
GPB General purpose Processor
SPB Special purpose Processor
TUB Timing Unit Board
ET Exchange Terminal
SCB Switch Control Board
SXB Switch Extension Board

19
 Main Processor (MP)
 High service level
 Intended for central control and resource
handling SW and for management services
 MP Cluster
Give redundancy on program level
Enable SW Upgrade during
execution
 Board Processor (BP)
 Aimed for board controlling SW
 Slightly lower service level
 Special purpose Processor (SP)
 Aimed for data stream processing and signaling
Multi Processor system
MP MP
MP
BP
BP
BP
BP
BP
SP
SP
SP
SP
SP
Main Processor Cluster
SXB
GPB
GPB
GPB SCB
SPB
TUB
ETB
RNC Subrack

20
 These RNC types (configurations) were available when Cingular
selected RNC’s for their launch (prior to P1)
 The “type” figure reflects maximum Iub (in Mbps) capacity
– From 26,000 to 251,000 subs
– Up to 540 RBSs per node
– Max Iub traffic from 35 Mbps to 435 Mbps
RNC 3810 Configurations (HW release 4)
Type
35
Type
115
Type
195
Type
275
Type
435
Type
355
Types selected by Cingular for launch

21
RNC Capacity (Cingular current types)
RNC 3810
type 195
RNC 3810
type 435
Mixed
traffic
values
Subscribers 156 000 351 000 #
BHCA 298 000 671 000 #
Iu 64 145 Mb/s
Iur 4 9 Mb/s
Iub 97 217 Mb/s
Voice 3 120 7 020 Erlang
UDI64 480 1 070 Erlang
PS data 22 50 Mb/s
Max.
values
Iub 195
264
792
435
540
1,620
Mb/s
RBS #
Cells #
Cabinets 1 2 #

22
Agenda
 Introduction
 RBS
 RNC
 Transport/RXI

23
WCDMA Radio Access Network
3GPP: RBS =Node B
Iu=Iu CS and Iu PS
Iu PS -> Gb in GPRS
Iu CS -> A in GSM

24
Unique AAL2 Switching functionality saves
up to 65% of the transmission link capacity
RXI 820 ATM/AAL2 switch
 Ericsson ATM node designed and
optimized for 3G/WCDMA networks
 Fully distributed HW support of all
real-time critical functions
 Telecom grade availability -
no single point of failure
 Small footprint
 Common platform to RNC, RBS &
RXI means synergies for O&M,
training and spare part
management

25
Transmission Medium Flexibility
xDSL
xDSL
modem
xDSL
modem
SDH
PDH
TDM
MUX
TDM
MUX
Optical Fibre
Copper
Interface options:
E1/T1/J1, E3/T3, STM-1(VC4)/OC-3c, STM-1(VC12)/OC-3(VT-1.5)
Microwave connection
mini
link
mini
link
CEoIP CEoIP
IP
RNC 3810
End-RBS 3000
Hub-RBS 3000
RXI 820
SDH
ADM
AT
M
SDH
ADM

26
Transport Channel Hierarchy RBS-RNC

27
Iub Networking Alternatives
PDH/SONET
Solutions
ATM Cross
Connect Solutions
AAL2 Switching
Solutions

28
Ericsson RAN Network Infrastructure
No AAL2 Switching
gives peak allocated
links
RBS site
ATM connection
for WCDMA traffic
Transmission
infrastructure
Without AAL2 Switching
• CBR ATM connections for
the RBS-RNC traffic are set
up individually
• Capacity requirements
decided by traffic peak case

29
AAL2 Switching
enables sharing link
capacity for many
RBS’s, enabling
savings of up to 65%
Achieving similar benefits as of routed IP networks while preserving
strict radio characteristics requirements of e.g. delay & delay variation
Nodes performing
AAL2 Switching
RBS site
ATM connection
for WCDMA traffic
Transmission
infrastructure
With AAL2 Switching
• RBS-RNC traffic can share
capacity on aggregated links
• Redundancy achieved by
AAL2 load sharing
• QoS separation to ensure
preferential treatment for
voice over R99 PS over
HSDPA
• Efficient RNC port
expansion
Ericsson RAN Network Infrastructure

30
Iub RAN Topologies
 Iub network topologies using ATM/AAL2
functionality in RBS and RXI
 Verified on network level
RBS
RBS
Hub RBS
/ RXI
Hub RBS
/ RXI
Hub RBS
/ RXI
Hub RBS
/ RXI

31

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