Metamorphosis teknologi transmisi pada industri selular
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Transcript of Metamorphosis teknologi transmisi pada industri selular
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GSM Transmission Networks
RAN◦ GERAN
◦ UTRAN
IP RAN◦ Packet Abis dan A over IP
◦ 3G Native IP
◦ LTE RAN
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GSM Architecture & Interfaces
BSC
HLR/AC/EIRTCSM
MSC/VLR
BTS
AbisInterface
AterInterface
AInterface
AirInterface
TC
Ater’Interface
Air interface OPEN• 13 kb/s traffic channels• 8 channels / TRX• some channels reserved for signalling• blocking
Ater interface PROPRIETARY• 16 kb/s traffic channels• up to 120 traffic channels / 2M frame• 64 kb/s CCS#7 signalling• 64 kb/s channels for X.25 NMS connection• blocking
Abis interface PROPRIETARY• 13 kb/s traffic channels• up to 96 traffic channels / 2M frame• one TRXSIG signalling channel / TRX• one BCFSIG signalling channel / BTS• 16, 32 or 64 kb/s signalling rates
A interface OPEN• 64 kb/s traffic channels• 30 traffic channels / 2M frame• 64 kb/s CCS#7 signalling• 64 kb/s channels for X.25 NMS connection
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GENERAL RULE for TS allocation0 : Synchronization1 - 24 : TCH25 - 30 : TRX/BCF SIG31 : Loop control
Max 12 TRX per 2 Mbit frame
Abis
Interface
Air
Interface
BSCMSC
A
InterfaceAter’
Interface
TC SM
Ater
Interface
BTS2
BTS1
bits 1 2 3 4 5 6 7 8
TS
0 Synchronisation
1 BTS 1
2 TRX 1
3 BTS 1
4 TRX 2
5 BTS 1
6 TRX 3
7 BTS 2
8 TRX 1
9 BTS 2
10 TRX 2
11 BTS 2
12 TRX 3
13 BTS 3
14 TRX 1
15 BTS 3
16 TRX 2
17 BTS 3
18 TRX 3
19 BTS 3
20 TRX 4
21 BTS 3
22 TRX 5
23 BTS 3
24 TRX 6
25 BTS 1 TRX 1 SIG BTS 1 BCF SIG BTS 1 TRX 2 SIG
26 BTS 1 TRX 3 SIG BTS 2 TRX 1 SIG BTS 2 BCF SIG
27 BTS 2 TRX 2 SIG BTS 2 TRX 3 SIG
28 BTS 3 TRX 1 SIG BTS 3 BCF SIG BTS 3 TRX 2 SIG
29 BTS 3 TRX 3 SIG BTS 3 TRX 4 SIG
30 BTS 3 TRX 5 SIG BTS 3 TRX 6 SIG
31 Loop bits / LCB / MCB
BTS 11+1+1
BTS 21+1+1
BTS 32+2+2
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Transmission equipment to branch data streams between different link sets
Non-blocking stage◦ Each input stream is routed to an output stream
Tasks◦ Switching between link sets
◦ Switching between timeslots of a PCM trunk
◦ Dropping & inserting timeslots
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3 x 2 Mbit/slinks
64 kbit/schannels
1 x 2 Mbit/slink
n
m
k
i < n+m+k
BSC
Total Traffic (Erl)Blocking Prob.
i = number of channels
Cross-ConnectsConcentration
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full 2 Mbit/s frames
BSC
not full 2 Mbit/s frames
Cross-ConnectsGrooming
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Secara fungsi RAN dibagi menjadi 3 jenis◦ GERAN (GSM EDGE Radio Access Network)
Jaringan Akses untuk GSM
◦ UTRAN (UMTS Teresterial Radio Access Network
Jaringan Akses untuk UMTS/WCDMA/3G
◦ E-UTRAN
Jaringan Akses untuk LTE/4G
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GSM EDGE RADIO ACCESS NETWORK
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◦ How Multiple E1 or T1 interfaces effectively provide a “virtual
common bandwidth” using MLPPP
IP layer on top of ML/Multi Class PPP (MCPPP) and HDLC over TDM (E1/T1)
TDM
TDMTDM Network
MLPPP
Packet Abis
E1/T1/FB
MLPPP
Packet Abis
E1/T1/SDHFlexiEDGE
BSC
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◦ How
L1 connectivity: options to bring Ethernet to the BTS sites are: to use DSL connection to use Ethernet MW Radio for last mile to use fiber connection
BSC
Eth
EthPacket Switched Network
UDP/ IP
Packet Abis
Ethernet
UDP/ IP
Packet Abis
EthernetBTS
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BSC Site router with Layer 2 (Ethernet) and optional Layer 3 (IP) functionality required for packet network based configurations for following purposes:
◦ Aggregation of site connectivity
◦ Flexible IP address planning and network configuration
◦ Router equipment redundancy based on Hot Standby Router Protocol (HSRP)
IP Backbone Network
2G BTS MGW
SGSN
HSRP
2G BTS
Virtual RouterRedundancy
BSC
A o IP
Gb o IP
Packet Abis
RG20
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UMTS RADIO ACCESS NETWORK
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Transport dari Node B ke RNC menggunakan 2 Teknologi transport ATM danEthernet
IuB yang menggunakan ATM biasanya digunakan untuk layanan circuit switching (voice,sms,mms)
IuB yang menggunakan tekhnologi ethernet digunakan untuk Data
Leased line domain
RNC
STM1
NBE1/T1
Eth
Ethernet
ATM(TDM Network)
Router
ATM Aggregator
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Menggunakan teknologi ATM untuk interface IuB
Layanan suara dan data menggunakanteknologi ATM, dipisahkan dengan virtual path (VP) yang berbeda
RNCNB
Eth
TDM Transmission
ATMAggregator
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Semua transport sudah menggunakanteknologi IP Transport
Semua layanan baik suara maupun data menggunakan teknologi packet switching
RNCNB
Eth
Ethernet
IP Router
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EVOLVED RADIO ACCESS NETWORK
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