ERICSSON
Ericsson BSS Introduction for Optimization and Planning Mohammad Rasoul Tanhatalab 2013
[email protected] +989155132368
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Contents Introduction Type of BTS Connect to BTS Connect to BSS Alex Frequency Hopping Multi Band (Common BCCH) Cell Load Sharing (CLS) Channel Administration Hierarchical Cell Structure AMR BTS and MS Power Control Idle Mode Behavior Some Important Commands
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Introduction This presentation is designed to provide an introduction to the planning, optimization and implementation processes in 2G Ericsson networks. However, this file tries to explain and mention the most important things that a RF engineer needs to know for Network Optimization along with some examples. As a matter of fact, this topic is prepared for engineer that has good knowledge about GSM and optimization but he/she are not familiar with Ericsson BSS networks. BACK TO MAIN MENU
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TYPE OF BTS BACK TO MAIN MENU
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Types of RBS RBS 6000 series RBS 6101 RBS 6201 RBS 6301 RBS 6601 RBS 6102 RBS 6202 ….
RBS 2000 Series RBS 2111 RBS 2216 RBS 2308 RBS 2116 RBS 2206 RBS 2202 RBS 2106 …
RBS 3000 Series RBS 3216 RBS 3116 RBS 3206 RBS 3106 …
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2000 RBS Overview (2202)
•IDM (Internal Distributed Module) •Power Supply Unit (PSU)
•ECU(Energy Control Unit) •CDU(Combining and Distributed Unit) • DXU (Distribution Switch Unit) •TRU (Transciever Unit)
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2000 RBS units function DXU TRU CDU ECU PSU
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RBS 6000 Overview •Support Control Unit (SCU) •Support Hub Unit (SHU) • Power Distribution Unit (PDU) • Power Connection Unit (PCU) • Battery Fuse Unit (BFU) • Power Supply Unit (PSU) •Power Filter Unit (PFU) •Support Alarm Unit (SAU) •Power Connection Filter (PCF) •Surge Protection Device (SPD) •Digital Unit (DU) •Radio Unit (RU) •Digital Baseband Advanced (DBA) •Channel Element Expansion Module (CEEM)
•AuXiliary Multiplexing Unit (XMU)
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DU (Digital Unit) The DU has the following functions: Timing function Loadable software (from Flash Card) Radio interface Transmission handling External synchronization Tower Mounted Amplifier Control Module (TMA-CM) (only for DUG 10 01) Type of DU The DUG 10 01 uses the architecture from RBS 2000 The DUG 20 01 uses the same architecture as the other radio standards in RBS 6000 (WCDMA and LTE)
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RU (Radio Unit) The RUS has the following functions: •Transceiving Receiving Processing (TRP) •Uplink and downlink filtering •Power Amplifier (PA) functions Up to four carriers downlink and uplink with 2-RX diversity (valid for RUS 01) •Up to eight carriers downlink and uplink with 2-RX diversity (valid for RUS 02) The RUG has the following functions: •Timing reference function by Local Timing Unit (LTU) •Transmitter Combining •UC/HC connector supervision •Output Power Supervision function •DC/DC function •Tower Mounted Amplifier Control Module (TMA-CM) Power
RU t = G | L | W | S; G for GSM, L for LTE, W for WCDMA, S for Multi-standard gg = generation; 01 and so on bb = 3GPP band; B1 and so on
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Supported Radio Configurations Configuration in each RBS is depended on which RBB and DBB is used.
RBBs: Radio Building Block is a unique way of combining either RUs, RRUs
DBBs: Digital Building Blocks are one or two DUs with defined connections to the RBBs in each sector
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Configuration Fore Single Standard Base Station RBB
Number of RUs per Sector
RBB11_1A
1
2× RBB11_1A RBB11_1A + RBB32_3B
2 4
RBB32_3A
3
2× RBB32_3A
6
RBB43_4A
4
Maximum Total Number of Carriers
DBB
12 12 24 24 48 12 36 24 48 36 48 12 24 36
DBB10_01 DBB10_02 2× DBB10_01 2× DBB10_01 DBB10_01 + 3× DBB10_44 DBB10_44 3× DBB10_44 2× DBB10_44 4× DBB10_44 3× DBB10_44 4× DBB10_44 DBB10_45 2× DBB10_45 3× DBB10_45
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Multi-standard Configurations A multi-standard RBS supports installation of nodes of different radio access systems in the same cabinet. In a multi-standard RBS, the support system is shared between the nodes in the cabinet. Each radio access system node is managed separately using its own radio standard tools, but only the primary node controls and supervises the support system. Multi-standard configurations can be either single mode or mixed mode configurations. Single Mode Mixed Mode Mohammad Rasoul Tanhatalab 2013
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Single Mode Single mode allows an RBS to be configured with different radio access systems within the same cabinet. Single mode allows the following combination of radio access systems: GSM and WCDMA GSM and LTE WCDMA and LTE LTE and CDMA Mohammad Rasoul Tanhatalab 2013
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Mixed Mode Mixed mode allows nodes of different radio standards within a cabinet to share radio and antenna resources. Mixed mode allows the following combination of radio access systems: GSM and WCDMA GSM and LTE WCDMA and LTE LTE and CDMA Mohammad Rasoul Tanhatalab 2013
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Single and Multi Standard Radio
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Remote Radio Unit (RRU) Remote Radio Unit (RRU) is often used as a generic expression for a remotely installed Radio Unit (RU). •The RRUS remotely extends
the reach of the RBS by up to 40 km •A fiber optic cable connects the RRUS •The RRUSs can be connected
in a star configuration or in a cascade configuration
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CONNECT TO BTS BACK TO MAIN MENU Mohammad Rasoul Tanhatalab 2013
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LMT and OMT Interface The client is connected to the cabinet for configuration and service purposes. In WCDMA the site LAN is used to communicate with the RBS Element Manager (EM). In LTE and CDMA the Local Maintenance Terminal (LMT) is used to communicate with the RBS EM. In GSM the site LAN is used to communicate with the Operation and Maintenance Terminal (OMT).
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OPERATION AND MAINTENANCE TERMINAL (OMT) OMT is a software tool specifically designed for the RBSs It is used to perform a number of Operation and Maintenance tasks on site or remotely from the BSC. OMT is a PC program that runs under Microsoft Windows
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OMT Task •Monitoring
the cabinets Internal Alarms in the troubleshooting process, •performing (Installation operations
Data
IDB Base)
•Defining the External Alarms and Antenna Related Auxiliary Equipment •(ARAE) •Monitor the hardware and configuration status of the RUs in the cabinet
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CONNECT TO BSS
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WinFIOL
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WinFIOL Setting
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ALEX (ACTIVE LIBRARY EXPLORER)
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ALEX (Active Library Explorer)
•By this Software we can find all information about ERICSSON . •We must add new library
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ADD LIBRARY TO ALEX
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BSS Structure Connections and Commands
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BSC/TRC BASIC CONCEPTS GROUP SWITCH (GS) Switching Network Terminal (SNT) Device (DEV) EXCHANGE TERMINAL CIRCUIT (ETC) Digital Path (DIP) RTS A-Bis interface Line Terminal (RBLT)
Radio Transmission & Transport Subsystem (RTS) RTS A-interface Line Terminal (RALT)
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Figure below shows the different names of the PCM link devices in the three types of BSS implementation.
RALT /RBLT 64 kbit/s device on E1, connected to PDH network RALT15 / RBLT15 64 kbit/s device on E1, connected to SDH network, 7-board ET155 RALT2 / RBLT2 64 kbit/s device on E1, connected to SDH network, 1-board ET155 RALT24 / RBLT24 64 kbit/s device on T1, connected to PDH network
RALT3 / RBLT3 64 kbit/s device on T1, connected to SONET network, 1-board ET155 RALT96 / RBLT96 64 kbit/s device on T1, connected to 24/96 channel ET (PDH) Mohammad Rasoul Tanhatalab 2013
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MO (Manage Objected) MO
Equipment in the BTS is seen in the BSC as Managed Objects (MOs).
Blocking state of MO: BLA : Blocked due to activity needed BLL : Load in progress BLO : Blocked automatically
BLT : Blocked due to testing MBL : Manually blocked
FORMAT
TG
Transceiver Group
RXOTG-tg
CF
Central Functions
RXOCF-tg
IS
Interface Switch
RXOIS-tg
CON
Concentrator
RXOCON-tg
DP
Digital Path
RXODP-tg-ldp
TF
Timing Function
RXOTF-tg
MCTR
Multi Carrier Transceiver Transceiver Carrier
RXOMCTR-tg-lmctr
TX
Transmitter
RXOTX-tg-ltrxc
RX
Receiver
RXORX-tg-ltrxc
TS
Time Slot
RXOTS-tg-ltrxc-lts
TRXC
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RXOTRX-tg-ltrxc
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TG , Code-Site and Channel Group Connection Data
Command for all TGs
