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BTS 18000 GSM Indoor Outdoor Engineering Rules
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Nortel Networks confidential
PE/DCL/DD/014278
01.04 / EN
Standard
May 2005
Page 77/79
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BTS 18000 GSM Indoor & Outdoor Engineering Rules
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Underwriters Laboratories Voltage Standing Wave Ratio Universal Mobile Telecommunication System Wireless Local Area Network World Trade
DEFINITIONS 8PSK
8 states Phase Shift Keying modulation. The modulation used for EDGE is a 8PSK with an additional constant shift of 3 Π/8 at each symbol change.
Abis
ETSI generic name of BSC-BTS interface. The Abis covers both the physical interface (PCM) and the protocols. Protocols are splitted in a TMG part and an O&M part, the former being mostly compliant with GSM 08.58, the latter being NMC
2.048 Mbit/s for E1 (or 1,544 Mbit/s for T1) physical link (HDB3 or B8ZS) where the clock is synchronous with the radio transmission.
Cabinet/shelf/rack In the document, the term cabinet point out the total enclosure of the equipment, as well as the entire equipment (enclosure+cabling+modules). Two versions of cabinet is described in this version of document BTS18000 Indoor cabinet and BTS18000 Outdoor. The term Rack is used to point out two physical sub-assembly: •
Combiner Rack: one stage of combiners equipments
•
Digital rack: one stage of digital and radio modules.
The term Shelf is used to point out the association of these two racks. Cavity
An association of passive RF frequency selective filters to combine a
dB
number of Transceivers onto one antenna. It includes a Diplexer unit. decibel. Dimensionless, it expresses a ratio.
dBm
decibel milliwatt. A logarithmic unit to express a power level, with reference to 1 mW. In radio, this reference is taken on a 50 Ohm load, while in telephony this is 600 Ohm.
Diplexer A frequency band selective circulator. Used, as any multiplexor, to minimise the number of physical transmission lines. For radio, transmission line are antenna system. DLU
A DLU contains all the hardware characteristics of the configuration of the BTS. This parameters are downloaded to the BTS and are used at initialisation stage.
Nortel Networks confidential
PE/DCL/DD/014278
01.04 / EN
Standard
May 2005
Page 78/79
BTS 18000 GSM Indoor & Outdoor Engineering Rules
Drop & Insert A technique allowing to daisy chain several components on a common physical bus, each components ensuring data integrity and positioning. DRX
Driver + Receiver + Frame Processor. A stand alone low RF level TRx ( No PA) Note that “DRX” describes any generation of DRX, including eDRX
EFT
“Ensemble de Fichiers Transferables”, french abbreviation for “set of transferable files”. An EFT contains a list of software (and DLU) files to download to a BTS and their associated catalogue file; this catalogue file contains information about the software version and the files to download, that are used by the BSC to manage the BTS downloading.
Extension BTS18000 BTS18000 cabinet installed as “extension” cabinet synchronized with S8000 CBCF main cabinet (with CMCF_ph2) or with a S12000 main cabinet. Granularity
Module granularity is defined as its number of TRXs capacity in a sector. Example: DRX has a granularity of 1, RM in O3 mode configuration a granularity of 3. RM in S111 mode configuration a granularity of 1.
Greenfield
BTS site made of only BTS18000 cabinets
GMSK
Gaussian Minimum Shift Keying. The modulation used in GSM system for air interface (except for EDGE)
HYBRID (3 dB combiner). A passive two input ports device INDOOR Equipment to be installed at locations that are protected from the local weather influences. However some conditions may not be totally excluded. LNA
Low noise amplifier. An RF amplifier used to enlarge very small useful received signals with a minimum added noise.
OUTDOOR
Equipment to be installed at locations that are totally open to local weather influences.
Private PCM
2.048 Mbit/s physical link (V11) where the clock is synchronous with the radio transmission.
TRX acronyms is used to point out in the GSM system the logical equipment in charge of transmission and reception. Physically, a RM module is equivalent to three TRX.
END OF DOCUMENT
Nortel Networks confidential
PE/DCL/DD/014278
01.04 / EN
Standard
May 2005
Page 79/79
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Sections 1. INTRODUCTION 1.1. OBJECT 1.2. SCOPE OF THIS DOCUMENT www.scribd.com/doc/41943237/BTS-18000-GSM-Indoor-Outdoor-Engineering-Rules
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1.3. AUDIENCE FOR THIS DOCUMENT 2. RELATED DOCUMENTS 2.1. APPLICABLE DOCUMENTS 2.2. REFERENCE DOCUMENTS 3. PRODUCT DESCRIPTION 3.1. OVERVIEW 3.2. PRODUCT FEATURES APPLICABLE TO BTS 18000 3.2.1 V15.0.1 FEATURES RELEASE 3.3. GENERAL VIEW 3.3.1 BTS 18000 INDOOR SPECIFIC 3.3.2 BTS 18000 OUTDOOR SPECIFIC 3.3.3 BTS 18000 INDOOR/OUTDOOR SHARING ELEMENTS 3.4. PRODUCT BENEFITS AND LIMITATIONS 3.5. BTS SYNCHRONIZATION 3.5.1 PRINCIPLE 3.5.2 BTS UPGRADE 4. HARDWARE DESCRIPTION 4.2. BTS 18000 PHYSICAL CHARACTERISTICS 4.2.1 BTS 18000 INDOOR 4.2.2 BTS 18000 OUTDOOR 4.3. BTS 18000 ELECTRICAL CHARACTERISTICS 4.3.2 BTS S18000 OUTDOOR 4.4. RF CHARACTERISTICS 4.5. BTS 18000 HARDWARE VIEWS 5. BTS 18000 BOARD ARCHITECTURE 5.1. OVERVIEW 5.2. MODULES AND BOARDS 5.2.1 COMMON FUNCTION MODULES (BCF) 5.2.2 RADIO MODULES 5.2.3 CABINET MODULES 5.2.4 ANCILLARIES MODULES 5.3. COMMON FUNCTION DEPLOYMENT 5.3.1 LOW CAPACITY CONFIGURATION 5.3.2 HIGH CAPACITY, NO REDUNDANCY 5.3.3 CONFIGURATIONS WITH REDUNDANCY 5.4. RADIO MODULES ENGINEERING RULES GUIDELINES 5.4.1 RADIO MODULE 5.4.2 RF COMBINERS 6. NETWORK ENGINEERING ISSUE 6.1. POWER CONFIGURATION : ATTENUATION & BSTXPWRMAX 6.2. SYSTEM CAPACITY : TRX PER CELL AND TRX PER SITE 6.3. TEI AND TRX ASSOCIATION 6.3.1 TEI CONSTRAINTS 6.3.2 TEI MAPPING 6.3.3 NUMBER OF ABIS TIMESLOTS 6.4. EDGE 6.5. SITES SYNCHRONIZATION 6.6. VSWR CONFIGURATION 6.7. HARDWARE CONFIGURATIONS MANAGEMENT 6.8. DROP & INSERT 7. BTS 18000 CONFIGURATIONS 7.1. BUILDING METHOD 7.2. MONOBAND CONFIGURATIONS RM WITH DDM H2 AND TXF H2 7.3. CONFIGURATIONS HPRM WITH DDM H2 AND TXF H2 7.4. DUALBAND CONFIGURATIONS RM WITH DDM H2 AND TXF H2 7.5. MONOBAND CONFIGURATIONS RM WITH DDM AND TXF 7.6. CONFIGURATIONS HPRM WITH DDM AND TXF 7.7. DUALBAND CONFIGURATIONS RM WITH DDM AND TXF 7.8. CONFIGURATIONS ENGINEERING RULES 7.8.1 GENERALS RULES 7.8.2 SPECIFICS RULES 7.8.3 CONFIGURATION CABLING 8. ABBREVIATIONS AND DEFINITIONS 8.1. ABBREVIATIONS 8.2. DEFINITIONS www.scribd.com/doc/41943237/BTS-18000-GSM-Indoor-Outdoor-Engineering-Rules
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