3G-NODE-B
MIGRATION TO
ETHERNET BACKHAUL
April 8, 2015
BB UNIT
1
Introduction
At present , Node-Bs are using TDM backhaul for
the connectivity with the RNC. The bandwidth
used are nXE1 where n varies from 3 to 12.
In order to provide higher bandwidth to
customers, we need to migrate to Ethernet
backhaul.
Currently, there are 1126 Node-Bs and 13 RNCs.
Out of 1126 Node-Bs, 699 are working on OFC.
April 8, 2015
Agenda
2
Advantages and challenges
Advantages
Ethernet can provide higher bandwidth .
Cheap and better economy of scale.
Efficient transport.
Challenges
Lacks simple and reliable synchronization
functionality of TDM.
Solution
IEEE 1588 PTP –for synchronization
April 8, 2015
Agenda
3
3G- NETWROK DETAILS
April 8, 2015
BB UNIT
4
3G-Line Diagram-Data
1+1 GE
4 GE
Node-B
FE 100 Mbps
April 8, 2015
RNC
SGSN
GGSN
Unchannelised STM-1.
To be upgraded to match
with the Ethernet backhaul
upgradation.
NME-1
5
Interfaces-Node B and RNC
SFPs are required to support FE optical at Node-B
end.
There are 13 RNCs with 3 different types. GE
port which will be made available by vendor are:
A4
3 Nos of GoU Boards
6+6 GE
A3
2 Nos of GoU Boards
4+4 GE
A2
1 No of GoU Board
2+2 GE
Synchronization requirement will be met M/s
Huawei supplied IEEE 1588 server. This will be
used to distribute synch signals through Ethernet
backhaul.
April 8, 2015
Agenda
6
RNC-Node-B Details-1
Sl No
RNC
Location
Serving
SSA
# of Node-B on OFC
1
CBE-SBC(A4)
CBE, CNR
CBE:99, Ooty:7,CNR:4
2
SLM-MEY(A3)
SLM
SLM:57,NAM:10
3
DPI-MAINE10B(A2)
DPI
DPI:9,HOS:10,KRI:8
4
ERD-TE(A3)
ERD
ERD:36,TUP:51
5
TR-DTAX(A3)
TR
TR:68,ARY:2,PER:2,KAR:13,PDK:10
6
MAELLIS#1(504)(
A2)
MA
MA: ?? , THENI:8
7
MAELLIS#2(505)(
A2)
MA
KKL:2, 5,MA: ?? , DDG:15
April 8, 2015
Agenda
7
RNC-Node-B Details-2
Sl No
RNC Location Serving SSA
# of Node-B on OFC
8
VLR-TE(A2)
VLR
VLR:23,TV MALAI:8
9
TNJ-TE(MC)(A2)
TNJ,KMB
TNJ:22,TIRUVARUR:6,,KKL:2,KMB:14,Nagai:7
10
KKD-DTAX(A2)
KKD
KKD:13,SVG:4,RMN:6, RMM:1
11
TT-DTAX(A2)
TT,VGR
TT:29,VGR:7, SVK:4
12
TVL-MW(A2)
TVL,NGC
TVL:27,NGC:15,KK:2
13
PY-TE(A2)
CDL,PY
PY:28, CDL:12, VLP:3
A4: 3 GoU Boards, 6+6
A3: 2 GoU Board, 4+4
A2: 1 GoU Board, 2+2
April 8, 2015
Agenda
8
RNC andTier1/2 Location Details-1
Sl No
RNC
Locat
ion
Servin
g SSA
Tier1 Location
Capacity of RPR RING
1
CBESBC
CBE,
CNR
CBE-CENTRAL
10G
2
SLMMEY
SLM
SLM-SVPT
10G
3
DPIMAINE10B
DPI
DPI-MAIN E10B
No RING
4
ERDTE
ERD
ERD-TE
10G
5
TRDTAX
TR
TR-DTAX
10G
6
MAELLIS#
1(504)
MA
7
MAELLIS#
2(505)
MA
MA-ELLIS NAGAR(T2)
10G
April 8, 2015
Agenda
9
RNC andTier1/2 Location Details-2
Sl No
RNC
Locat
ion
Servin
g SSA
Tier1 Location
Capacity of RPR RING
8
VLR-TE
VLR
VLR-TE
10G
9
TNJTE(MC)
TNJ,KMB
TNJ-TE(MC)
10
KKDDTAX
KKD
KKD-DTAX
No RING
11
TTDTAX
TT,VGR
TT-DTAX
No RING
12
TVLMW
TVL,NGC
TVL-DTAX
10G
13
PY-TE
CDL,PY
PY-TE
10G
April 8, 2015
Agenda
1G
10
BB- NETWROK DETAILS
April 8, 2015
BB UNIT
11
BB AGGREGATION NETWORK-1
SSA
RPR
RING
T1
Location
CBE#1
10G
CBE-CENTRAL
CBE#2
10G
CBE-MAIN
CNR
NO RING
Ooty
CDL
1G
CDL-TE
April 8, 2015
Tier2 Locations
CBECENTRAL
KURICHI
NEYVELI
Vilupura
m
PEELA
MEDU
NME-1
GANAPAT
HY
THUDIYA
LUR
SBC
GE:
Thondam
uthur
12
BB AGGREGATION NETWORK-2
SSA
RPR
RING
T1 Location
DPI
NO RING
DPI-TE
ERD
10G
ERODE-TE
KKD
NO RING
KKD
KMB
1G
KMB
April 8, 2015
NME-1
Tier2 Locations
Perundurai
Bhavani
ADUTHURAI
SRINAGAR
COLONY
13
BB AGGREGATION NETWORK-3
SSA
RPR
RING
T1 Location
MA
10G
MA-TALLAKULAM
MATALLAKULAM
KK NAGAR
NGC
10G(But
No RING)
NGC-TE
COLACHEL
NGC-TE
PY
10G
PY-TE
OKP
SLM
10G
SVPT-TE
TNJ
1G
TR
10G
April 8, 2015
Tier2 Locations
EAST MASI
VILLAPURAM
VILLIANUR
THIRU
CHITRA
AMBALAM
LAWSPET
MEYYANUR
SALEM TOWN
AMMAPET
TNJ
KARANTHAI
MED
COLLEGE
TR-CNT
THILLAI NGR
TR-MGG
NME-1
TR-SRGM
ELLIS NAGAR
TR-CANT
14
BB AGGREGATION NETWORK-4
SSA
RPR
RING
T1 Location
TVL
10G
TVL-TE
TT
NO RING
TT-TE
VGR
1G
VLR
10G
April 8, 2015
Tier2 Locations
PALAI
MELAPALYA
M
VGR-TE
SIVAKASI
SATUR
VLR-TE
SANTHAIVASA
L
POLUR
CHETPET
ARANI
RANIPET
KATPADI
NME-1
WANDIWASH
THIRUVETTI
PURAM
15
INTERFACE DETAILS
April 8, 2015
BB UNIT
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Interfaces-3G
a) FE ELECTRICAL
OR
b) FE OPTICAL SFP
NODE-B
W/L
MODE,Line
Rate
TX
Pwr(dbm)
RX
Sens(dbm)
Range
Connector
850nm, FE
MM,2.125G
-9.5 to -2.5
-17
0.5km
LC-SC
1310nm(FE
over STM-1)
SM,STM-1
-15 to
-8
-31
15Km
LC-SC
W/L
MODE,Line
Rate
TX Pwr
RX Sens
Range
Connector
1310nm,GE
SM,1.25G
-9 to -3
-20
10km
LC-SC
RNC
GE OPTICAL SFP
April 8, 2015
NME-1
17
Interfaces-Broadband
RPR Tier
1/Tier2
FE: FE-FX-PHYUTSTARCOM
1XX0924906-F(as
seen in Vellore)
Interface
W/L
MODE
GE
1550nm
FE
850nm
TX
Pwr(dbm)
Range
Connector
SM
1-40Km
LC
MM
100 m1000m
LC
Availability of SFPs to be checked
Interface
W/L
MODE
GE*
1550nm
SM
20Km
FE
850nm
SM
500m
FE: 155Mbps,2Km,850 nm
Rodevices make
(as seen in Vellore)
April 8, 2015
RX
Sens(
dbm)
GE: GE-LH-40
UTSTARCOM
1XX0878700-H(as seen in
Vellore)
TX
Pwr(dbm)
RX
Sens(
dbm)
Range
*4 ports of GE can be made
as Electrical also
NME-1
Connector
OCLAN
GE: 1.25Gbps,30Km,1550nm
Rodevices make
(as seen in Vellore)
18
Interfaces-TRANSMISSION
Interface
W/L
MODE
FE optical
1310nm
SM
TX
Pwr(dbm)
CPE-8
Availability of SFPs to be
checked
FE
electrical
Interface
W/L
MODE
GE
1000 Base
LH(1500nm/
1550nm)
SM
FE optical
1310nm
SM
FE
electrical
Range
Connector
15KM
LC
-
TX
Pwr(db
m)
RX
Sens(
dbm)
Range
Connector
LC
15Km
MADM-16
LC
-
FIBER XON
1310nm 155m
SFP(as seen in
Vellore)
April 8, 2015
RX
Sens(
dbm)
WTD RTXM 139-400
WHTD 004201
155m,15Km,1310nm-SMESFP(as seen in Vellore)
FTTH-ONT
NME-1
4 FE
electrical
19
OPTIONS AND CHALLENGES
April 8, 2015
BB UNIT
20
Various Options and its challenges-1
Riding over BB Aggregation Ring i.e RPR Ring.
RPR are mostly intra city rings. The rings are not
available in all SSAs and very few of them are
10G.
Already,
NME-University(155
Mbbs),
GPON/GEPON, WiMaX, IPTAX,IPTV,VPN use this
ring for transport.
This is apart from the
DATAONE Traffic the purpose for which the ring
has been designed originally.
Some Tier2 switches do not support FE
interfaces. The availability of SFPs are very
limited.
April 8, 2015
Agenda
21
Various Options and challenges-2
Capitalizing on FTTH services :GPON and GEPON
based FTTH services are available at following
locations only.
Location
Technology
OLTs
Coimbatore City
GPON
35
Tirupur City
GPON
01
Salem City
GEPON
01
Trichy City
GEPON
02
Vellore City
GEPON
01
Madurai City
GEPON
02
Pondi City
GEPON
01
April 8, 2015
Agenda
22
Various Options and challenges-3
Using the combination of MADM-16 Rings with
CPE-8. SFP availability limited.
Using the combination of FTTH and CPE-8.
Using the combination of Tier2 and CPE-8. SFP
availability to be checked.
Using E1-FE converter /WDM splitter.
April 8, 2015
Agenda
23
SCENARIOS POSSIBLE-1
Using RPR Ring



Node-Bs co-located with RPR Tier1/Tier2.
Node-Bs Nearer to Tier1/Tier2: Drive distance of SFP
and availability of fibre pair are critical. If not WDM
splitter may be used.
Node-Bs which are built-Up to Nearest Tier1/Tier2
station using CPE-8 sytems : Use 1310 nm SFP at
Tier1/Tier2end.
Using FTTH ONU-s which have FE electrical.
Using the combination of FTTH and CPE-8: Use
FE electrical interfaces available at both ends.
.
April 8, 2015
Agenda
24
SCENARIOS POSSIBLE-2
Using the MADM-16 Rings


Node-Bs co-located with MADM-16 terminal: Use FE
electrical available at both ends.
Node-Bs which are built-up to the nearest MADM-16
Station by using CPE-8 Systems: Use FE electrical
available at both ends.
Using the Aggregation Switch : Built media upto
Aggregation switch which should be located at
RNC end.
 Using E1-FE converter /WDM splitter

April 8, 2015
Agenda
25
DIRECT CONNECTIVITY USING SFP
If Tier 1 or Tier 2 are located within the
drive distance of SFP and spare fibre is
available from Node-B location to
Tier1/2 location, 1310nm SFP at Node-B
end can be used. Please ensure 1310
nm SFP at Tier1/2 end which may be
available spare from CPE-8/MADM-16
systems.
April 8, 2015
BB UNIT
26
CONNECTIVITY USING CPE-8 system
If Tier 1 or Tier 2 location is used as
Built-up stations for distant end NodeBs (using CPE-8 systems), put the
1310nm SFP at Tier 1 or Tier2 and
provide connectivity.
April 8, 2015
BB UNIT
27
USING MADM RING
MADM-16 Ring Nodes can also be used
to carry FE traffic from CPE-8/Node-Bs.
MADM terminal in the ring which is colocated at RNC end can also be used to
aggregate FE to GE.
April 8, 2015
BB UNIT
28
AGGREGATION SWITCH
Aggregation switch can be deployed at
RNC location for aggregating Node-B
traffic in FE interfaces and then make it
as GE towards RNC.
April 8, 2015
BB UNIT
29
ISSUES-1
Node-Bs generate about 3X14.4 ~ 50Mbps traffic.
Hence, riding over RPR ring shall be attempted
only in 10G ring locations(8) viz CBE,ERD,MA,
PY,SLM,TR,TVL and VLR. (CBE no FE I/F)
FTTH
is
available
at
the
cities
of
CBE,TUP,VLR,SLM,PY,TR and MA. Node-Bs at
CBE may be connected using GPON as there are
35+ OLTs and are of protected configuration.
Though FE/GE ports are available in BB/TX
nodes, very few SFPs are available. Those too,
are required for upcoming BB expansion project.
April 8, 2015
Agenda
30
ISSUES-2
It is not clear whether SFPs will be made
available to all Node-Bs.
RNC interfaces, both uplink and downlinks shall
suitably be upgraded. To derive the max benefit,
all the connectivity
in the chain shall be
augmented.
Replaced CPE-21 shall be properly reused.
ODF/FDF,Patch cords, connectors, SM-MM
convertor(modal conditioning patch cords) etc
are required depending on the site conditions.
April 8, 2015
Agenda
31
ISSUES-3
Synchronizations to be ensured; otherwise call will
drop.(No handover with adjacent cell possible )
RNCs located at CBE,TNJ,TT,TVL and PY serve adjacent
SSA also. In that scenario, separate 1+1 GE interface to
be allocated at RNC end for connecting the adjacent SSA
Node-Bs.
The present traffic of MADM-16 Ring shall be studied
before attempting to use it.
April 8, 2015
Agenda
32
CASE STUDY-PY
April 8, 2015
BB UNIT
33
RNC-CONNECTIVITY-PY(LOGICAL)
1310,GE,SM,LC
RNC
1550,GE,SM,LC
ODF
TIER 1
In the case of PY SSA, both RNC and Tier 1 are co-located in the same floor. One ODF was
also availabe in the MSC SWITCH ROOM which is used for interconnection.
1+1 GE interfaces available in both RNC and Tier1 are used for interconnection. Though
wavelength is different, it will work since the receiver in both ends will normally be
Wideband but the range will be limited to the lower of the two.
April 8, 2015
NME-1
34
PY MADM –RPR-RNC-LOGICAL
LSP
RBN
TKM
NNR
MADM
RING 1
ARK
MADM
RING 3
BHR
PY
MADM
RING 2
OKP
KET
GE
GE
PY
T1
PY
T1
T2
LSP
VIN
AVE
PY
GE
FE
T2
TCM
April 8, 2015
ENR
PY
MAIN
RNC
FE
KIU
MUP
MTP
MKM
T2
BB UNIT
MADM
RING 5
VIN
RPR
T1/T2
T2
PY
OKP
35
CO-LOCATED NODE-B(WITH Tier 1 or 2)
850nm,FE/GE,MM,LC
Node-B
850nm,FE,MM,LC
Tier 1 or 2
MM PATCH CORD
April 8, 2015
BB UNIT
36
OTHER NODE-Bs
Pl refer to the Ann-1(Excel sheet)
April 8, 2015
BB UNIT
37
THANKS
TRANSMISSION UNIT
BSNL-TAMILNADU CIRCLE
http://www.bsnl.co.in
rbabusrinivas@bsnl.co.in
April 8, 2015
THE END
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