Metamorphosis teknologi transmisi pada industri selular
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bahan presentasi Knowledgefest 2014
Transcript of Metamorphosis teknologi transmisi pada industri selular
GSM Transmission Networks
RAN◦ GERAN
◦ UTRAN
IP RAN◦ Packet Abis dan A over IP
◦ 3G Native IP
◦ LTE RAN
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
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
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
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
full 2 Mbit/s frames
BSC
not full 2 Mbit/s frames
Cross-ConnectsGrooming
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
GSM EDGE RADIO ACCESS NETWORK
◦ 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
◦ 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
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
UMTS RADIO ACCESS NETWORK
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
Menggunakan teknologi ATM untuk interface IuB
Layanan suara dan data menggunakanteknologi ATM, dipisahkan dengan virtual path (VP) yang berbeda
RNCNB
Eth
TDM Transmission
ATMAggregator
Semua transport sudah menggunakanteknologi IP Transport
Semua layanan baik suara maupun data menggunakan teknologi packet switching
RNCNB
Eth
Ethernet
IP Router
EVOLVED RADIO ACCESS NETWORK
