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LTE Network Fundamentals

  LTE Network Fundamentals: Essential Questions and Answers :- Q.1 What is possible range of PCI? ->0-503, PSS(0,1,2) and SSS(0-167) Q.2 What are the Physical Downlink Signals? ->Reference signal and synchronization signals - PSS and SSS Q.3 Difference between RSRP & RSRQ? ->RSRP – avg power across all received RS symbols in measurement bandwidth ->RSRQ-NxRSRP/RSSI ->N- no of RBs of eutra rssi measurement bandwidth Q.4 Repetition period of MIB? ->40ms Q.5 What is modulation scheme used for MIB? ->QPSK Q.6 Which channel carries user data in DL? (Basic) ->PDSCH Q.7 How many OFDM symbols are used for PDCCH? ->1, 2, or 3 as indicated by PCFICH Q.8 Which Physical DL channel carries the Paging channel? ->PDSCH Q.9 S1 Interface ->Enode B - MME - S1C and Enode B - SGW - S1U Q.10 Function of PHICH ->HARQ indication Q.11 Modulation scheme in PHICH? ->BPSK Q.12 What All BW supported in LTE? ->1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz Q.13 What is X2? -&
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FDD GPS & FDD TO WCDMA SYNC SYNC OUT TO SYNC IN

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TDD TO SRAN SYNC SYNC OUT TO SYNC IN

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Sync SSM Timed Out on unit 0, interface 1

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GSM NETWORK INTERFACES

GSM Network Interfaces In order to ensure that networks could be assembled from elements from different manufacturers, standard interfaces were defined. In this way it could be guaranteed that the way they communicated would be the same whatever manufacturer. This approach enabled a large number of equipment manufacturers to enter the market and grew the overall number of suppliers and level of competition. The interfaces varied dependent upon the connection, i.e. which network elements or entities were being connected. GSM network interfaces list A series of different interface definitions were written and each given names as seen below.   Um interface    T he "air" or radio interface standard that is used for exchanges between a mobile (ME) and a base station (BTS / BSC). For signalling, a modified version of the ISDN LAPD, known as LAPDm is used.   Abis interface    This is a BSS internal interface linking the BSC and a BTS, and it has not been totally
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NOKIA FSMF CONFIGURATION RESET

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NOKIA FLEXI TRX ADDITION

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GSM IDENTIFIERS
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MODULE NAME

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           TELECOM SOFTWARE TELECOM SOLUTION NETWORK PROJECT   MODULE NAME v FXJB:- Flexi multi radio 900 MHz revision v FRDJ:- Flexi radio module 900 MHz revision v FXED:- Flexi multi radio 1800 MHz revision v AREA:- Air scale Radio module 1800 MHz version v FRGT:- Flexi radio module 2100 MHz revision v FRGQ:- Flexi single radio module 2100 MHz revision v FRGP:- Flexi radio module 2100 MHz revision v FXEF:- Flexi multi radio 1800 MHz revision v FXEB:- Flexi multi radio 1800 MHz revision v FSMF:- Flexi system module revision v ESMB:- Flexi Edge System module revision v FTIF:- Flexi Transport interfaces revision v FTIB:- Flexi Transport interfaces revision v TDD:- Time-division Duplex v FDD :- Frequency-division Duplex v CRFS:- Classic radio frequency share v IP:- Internet Protocol
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