3G-NODE-B MIGRATION TO

1
3G-NODE-BMIGRATION TO

• ETHERNET BACKHAUL

2
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.

3
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

4

• 3G- NETWROK DETAILS

5
3G-Line Diagram-Data
11 GE
4 GE
Node-B
RNC
SGSN
GGSN
Unchannelised STM-1. To be upgraded to match
with the Ethernet backhaul upgradation.
FE 100 Mbps
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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
• Synchronization requirement will be met M/s
  Huawei supplied IEEE 1588 server. This will be
  used to distribute synch signals through Ethernet
  backhaul.

A4 3 Nos of GoU Boards 66 GE
A3 2 Nos of GoU Boards 44 GE
A2 1 No of GoU Board 22 GE
7
RNC-Node-B Details-1

Sl No RNC Location Serving SSA of Node-B on OFC
1 CBE-SBC(A4) CBE, CNR CBE99, Ooty7,CNR4
2 SLM-MEY(A3) SLM SLM57,NAM10
3 DPI-MAIN-E10B(A2) DPI DPI9,HOS10,KRI8
4 ERD-TE(A3) ERD ERD36,TUP51
5 TR-DTAX(A3) TR TR68,ARY2,PER2,KAR13,PDK10
6 MA-ELLIS1(504)(A2) MA MA ?? , THENI8
7 MA-ELLIS2(505)(A2) MA KKL2, 5,MA ?? , DDG15
8
RNC-Node-B Details-2

Sl No RNC Location Serving SSA of Node-B on OFC
8 VLR-TE(A2) VLR VLR23,TV MALAI8
9 TNJ-TE(MC)(A2) TNJ,KMB TNJ22,TIRUVARUR6,,KKL2,KMB14,Nagai7
10 KKD-DTAX(A2) KKD KKD13,SVG4,RMN6, RMM1
11 TT-DTAX(A2) TT,VGR TT29,VGR7, SVK4
12 TVL-MW(A2) TVL,NGC TVL27,NGC15,KK2
13 PY-TE(A2) CDL,PY PY28, CDL12, VLP3
A4 3 GoU Boards, 66 A3 2 GoU Board,
44 A2 1 GoU Board, 22
9
RNC andTier1/2 Location Details-1

Sl No RNC Location Serving SSA Tier1 Location Capacity of RPR RING
1 CBE-SBC CBE, CNR CBE-CENTRAL 10G
2 SLM-MEY SLM SLM-SVPT 10G
3 DPI-MAIN-E10B DPI DPI-MAIN E10B No RING
4 ERD-TE ERD ERD-TE 10G
5 TR-DTAX TR TR-DTAX 10G
6 MA-ELLIS1(504) MA MA-ELLIS NAGAR(T2) 10G
7 MA-ELLIS2(505) MA MA-ELLIS NAGAR(T2) 10G
10
RNC andTier1/2 Location Details-2

Sl No RNC Location Serving SSA Tier1 Location Capacity of RPR RING
8 VLR-TE VLR VLR-TE 10G
9 TNJ-TE(MC) TNJ,KMB TNJ-TE(MC) 1G
10 KKD-DTAX KKD KKD-DTAX No RING
11 TT-DTAX TT,VGR TT-DTAX No RING
12 TVL-MW TVL,NGC TVL-DTAX 10G
13 PY-TE CDL,PY PY-TE 10G
11

• BB- NETWROK DETAILS

12
BB AGGREGATION NETWORK-1
SSA RPR RING T1 Location Tier2 Locations Tier2 Locations Tier2 Locations Tier2 Locations Tier2 Locations Tier2 Locations Tier2 Locations
CBE1 10G CBE-CENTRAL CBE-CENTRAL KURICHI PEELAMEDU GANAPATHY THUDIYALUR SBC GE Thondamuthur
CBE2 10G CBE-MAIN
CNR NO RING Ooty
CDL 1G CDL-TE NEYVELI Vilupuram
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BB AGGREGATION NETWORK-2
SSA RPR RING T1 Location Tier2 Locations Tier2 Locations
DPI NO RING DPI-TE
ERD 10G ERODE-TE Perundurai Bhavani
KKD NO RING KKD
KMB 1G KMB ADUTHURAI SRINAGAR COLONY
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BB AGGREGATION NETWORK-3
SSA RPR RING T1 Location Tier2 Locations Tier2 Locations Tier2 Locations Tier2 Locations Tier2 Locations
MA 10G MA-TALLAKULAM MA-TALLAKULAM KK NAGAR EAST MASI VILLAPURAM ELLIS NAGAR
NGC 10G(But No RING) NGC-TE COLACHEL NGC-TE
PY 10G PY-TE OKP VILLIANUR THIRU CHITRA AMBALAM LAWSPET
SLM 10G SVPT-TE MEYYANUR SALEM TOWN AMMAPET
TNJ 1G TNJ KARANTHAI MED COLLEGE
TR 10G TR-CNT THILLAI NGR TR-MGG TR-SRGM TR-CANT
15
BB AGGREGATION NETWORK-4
SSA RPR RING T1 Location Tier2 Locations Tier2 Locations Tier2 Locations Tier2 Locations Tier2 Locations
TVL 10G TVL-TE PALAI MELAPALYAM
TT NO RING TT-TE
VGR 1G VGR-TE SIVAKASI SATUR
VLR 10G VLR-TE SANTHAIVASAL POLUR CHETPET WANDIWASH THIRUVETTIPURAM
VLR ARANI RANIPET KATPADI
16

• INTERFACE DETAILS

17
Interfaces-3G

• FE ELECTRICAL
• OR
• b) FE OPTICAL SFP

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
NODE-B
RNC
W/L MODE,Line Rate TX Pwr RX Sens Range Connector
1310nm,GE SM,1.25G -9 to -3 -20 10km LC-SC
GE OPTICAL SFP
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Interfaces-Broadband
GE GE-LH-40 UTSTARCOM 1XX0878700-H(as seen in
Vellore)
Interface W/L MODE TX Pwr(dbm) RX Sens(dbm) Range Connector
GE 1550nm SM 1-40Km LC
FE 850nm MM 100 m-1000m LC
RPR Tier 1/Tier2
FE FE-FX-PHY-UTSTARCOM 1XX0924906-F(as seen in
Vellore)
Availability of SFPs to be checked
Interface W/L MODE TX Pwr(dbm) RX Sens(dbm) Range Connector
GE 1550nm SM 20Km
FE 850nm SM 500m
OCLAN
FE 155Mbps,2Km,850 nm Rodevices make (as seen in
Vellore)
GE 1.25Gbps,30Km,1550nm Rodevices make (as seen
in Vellore)
4 ports of GE can be made as Electrical also
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Interfaces-TRANSMISSION
WTD RTXM 139-400 WHTD 004201 155m,15Km,1310nm-SM-E
SFP(as seen in Vellore)
Interface W/L MODE TX Pwr(dbm) RX Sens(dbm) Range Connector
FE optical 1310nm SM 15KM LC
FE electrical - - - - - -
CPE-8
Availability of SFPs to be checked
Interface W/L MODE TX Pwr(dbm) RX Sens(dbm) Range Connector
GE 1000 Base LH(1500nm/1550nm) SM LC
FE optical 1310nm SM 15Km LC
FE electrical - - - - - -
MADM-16
FIBER XON 1310nm 155m SFP(as seen in Vellore)
FTTH-ONT
4 FE electrical
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• OPTIONS AND CHALLENGES

21
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.

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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
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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.
• Using the MADM-16 Rings.

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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.
• .
• Using the MADM-16 Rings.

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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

26
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.

27
CONNECTIVITY USING CPE-8 system

• If Tier 1 or Tier 2 location is used as Built-up
  stations for distant end Node-Bs (using CPE-8
  systems), put the 1310nm SFP at Tier 1 or Tier2
  and provide connectivity.

28
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 co-located at RNC end can also be
  used to aggregate FE to GE.

29
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.

30
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.

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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.

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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 11
  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.

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• CASE STUDY-PY

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RNC-CONNECTIVITY-PY(LOGICAL)
1310,GE,SM,LC
1550,GE,SM,LC
RNC
TIER 1
ODF
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. 11 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.
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PY MADM RPR-RNC-LOGICAL
LSP
NNR
MUP
ENR
RBN
MADM RING 1
MADM RING 2
OKP
KET
PY MAIN
RNC
TKM
ARK
AVE
PY
PY
GE
GE
FE
FE
MADM RING 5
PY
GE
T1
KIU
MADM RING 3
PY
PY
T2
MTP
VIN
T1
LSP
T2
BHR
RPR T1/T2
MKM
VIN
TCM
T2
OKP
T2
36
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
37
OTHER NODE-Bs

• Pl refer to the Ann-1(Excel sheet)

38
THANKS

• TRANSMISSION UNIT
• BSNL-TAMILNADU CIRCLE
• http//www.bsnl.co.in
• rbabusrinivas_at_bsnl.co.in