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WLL-OVERVIEW LOCAL LOOP WHY WIRELESS LOCAL LOOP TYPES OF WLL SYSTEM MICRO & MACRO ARCHITECTURE SALIENT FEATURES OF MACROCELL & MICROCELL SYSTEMS RADIO.

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Presentation on theme: "WLL-OVERVIEW LOCAL LOOP WHY WIRELESS LOCAL LOOP TYPES OF WLL SYSTEM MICRO & MACRO ARCHITECTURE SALIENT FEATURES OF MACROCELL & MICROCELL SYSTEMS RADIO."— Presentation transcript:

1 WLL-OVERVIEW LOCAL LOOP WHY WIRELESS LOCAL LOOP TYPES OF WLL SYSTEM MICRO & MACRO ARCHITECTURE SALIENT FEATURES OF MACROCELL & MICROCELL SYSTEMS RADIO SPECTRUM PLANNING CRITERIA BSNL PLANS

2 COPPER BASED ACCESS NETWORK CABLE LAYING TIME - VERY HIGH UPGRADATION/RE-CONFIGURATION---TIME CONSUMING FAULT PRONE MAINTENANCE --DIFFICULT CUSTOMER INTERFACE HIGH BANDWIDTH SERVICES- NOT SUPPORTED LAST ---- (first)? MILE

3 Copper Local Loop FSUBTS ExchangeSubscriber Wireless Local Loop Exchange Subscriber BSC ○ TWO METHODS FOR SUBSCRIBER CONNECTION

4 WHAT IS WILL ? WILL IS A LOCAL COMMUNICATION NETWORK WHICH IS ESSENTIALLY A WIRELESS BASED NETWORK CAPABLE OF PROVIDING USERS ACCESS TO ‘PSTN’ NETWORK AND ASSOCIATED FACILITIES SUPPORTING LOCAL LOOP FUNCTIONALITIES TO SERVE USERS WITH VOICE AND NON-VOICE SERVICES.

5 WIRELESS IN LOCAL LOOP (WILL) WILL ACCESS WIRELESS LOCAL RURAL, SUB-URBAN & URBAN WIRELESS BASED LOCAL COMMUNICATION N/W PROVIDES USER ACCESS TO A TRANSPORT N/W SERVES IN RURAL,SUB-URBAN & URBAN AREAS PROVIDES VOICE & NON-VOICE SERVICES

6 REQUIREMENTS OF WILL BASIC SERVICES-- VOICE,FAX,LOW SPEED DATA,PAY PHONE SUPPLEMENTARY SERVICES--CALL FORWARDING --CALL WAITING& --CALL BARRING -- ABSENT SUBs SERVICE -- AUTOMATIC CALL BACK -- CONFERENCE CALLING SERVICE QUALITY: -- VOICE QUALITY -- GRADE OF SERVICE -- NETWORK AVAILIBILITY

7 MULTIPLE ACCESS METHODS FREQUENCY DIVISION MULTIPLE ACCESS (FDMA) INDIVIDUAL TRANSMISSIONS ARE SEPARATED FROM ONE ANOTHER IN FREQUENCY TIME DIVISION MULTIPLE ACCESS (TDMA) INDIVIDUAL TRANSMISSIONS ARE SEPARATED FROM ONE ANOTHER IN TIME CODE DIVISION MULTIPLE ACCESS (CDMA) LARGE NUMBER OF TRANSMISSIONS ARE COMBINED ON THE SAME RF CHANNEL AT THE SAME TIME BUT ARE SEPERATED BY “CODES”

8 MULTIPLE ACCESS TECHNIQUES FREQUENCYFREQUENCY TIME FDMA TDMA CDMA

9 TECHNOLOGY OPTIONS MICRO ARCHITECTURE CT-2 CORDLESS TECHNOLOGY-2 DECT DIGITAL ENHANCED CORDLESS TECHNOLOGY PHS PERSONAL HANDIPHONE SERVICE MACRO ARCHITECTURE GSM GLOBAL SYSTEM FOR MOBILE COM. DAMPS DIGITAL ADVANCED MOBILE PHONE SERVICE CDMA CODE DIVISION MULTIPLE ACCESS

10 MICROCELL SYSTEMS DIGITAL CORDLESS SYSTEMS PARTIAL REPLACEMENT OF COPPER SUITABLE FOR HIGH DENSITY AREAS COVERAGE- FEW HUNDRED METERS IN URBAN AREAS & UPTO 5KM IN OPEN AREA. COR-DECT SYSTEM DECT INTERFACE UNIT (DIU) COMPACT BASE STATION (CBS) WALL SET (WS)

11 TECHNICAL PARAM ETERS -- DECT DECT FREQUENCY ACCESS METHOD DUPLEXING METHOD MODULATION TIME SLOT PER CARRIER VOICE CHLs /CARRIER RF CHHANNEL SPACING VOICE CODING ALGORITHM VOICE CODING RATE CHANNEL BIT RATE ETSI STANDARD MHz MC-TDMA TDD GFSK MHz ADPCM 32 Kb/s 1152 Kb/s

12 TECHNICAL PARAM ETERS --CDMA CDMA FREQUENCY ACCESS METHOD DUPLEXING METHOD MODULATION VOICE CHLs / CARRIER RF CHHANNEL SPACING VOICE CODING ALGORITHM VOICE CODING RATE IS-95A STANDARD & Mhz CDMA FDD QPSK/ OQPSK /SECTOR 1.25 Mhz QCELP/EVRC 8/13 Kbps

13 SYSTEM ARCHITECTURE --corDECT T E L E. Ex. DIUDIU CBS.. DIU DECT INTERFACE UNIT BS BASE STATION WALLSET HANDSET G 703 2W LINES

14 MACROCELL SYSTEMS DOVELOPED FOR PROVIDING MOBILE TELEPHONE SYSTEMS. MODIFIED FOR FIXED APPLICATIONS AND PROVIDS LIMITED MOBILITY. BASE STATION COVERS UPTO 5KM IN URBAN & UPTO 25 KM IN RURAL. COMPLETE REPLACEMENT OF COPPER. CDMA BASED WLL SYSTEM BASE STATION CONTROLLER (BSC) - BSC WITHOUT SWITCHING ARRANGEMENT

15 CONNECTION WITH PSTN AND NUMBERING SCHEME - ON VF BASIS - 2MBPS USING V5.1 INTERFACE - 2MBPS USING V5.2 INTERFACE BSC WITH SWITCHING ARRANGEMENTS - CONNECTION BY 2MBPS ON JUNCTION BASIS - USING EITHER R2MF OR CCS7 SIGNALLING SCHEME BASE STATION TRANSCEIVER SUB-SYSTEM (BTS) - TYPES OF BTS - CONNECTIVITY WITH BSC FIXED WIRELESS TERMINAL (FWT) & MS

16 -SSU -MSU REQUIREMENT OF INFRASTRUCTURE - AIRCONDITIONING - SPACE NETWORK MANAGEMENT SYSTEM (NMS) BILLING

17 PSTN PSPDN BSM BSC BTS MS FWT RS422 LGIC PROPERIETERY (BHI) X.25 R2/NO.7/V5.2 (E1 LINK) NETWORK DIAGRAM (E1 LINK)

18 SYSTEM ARCHITECTURE --CDMA P S T N Ex BASE STATION CONTROLLER PLUS SWITCH BASE STN. TRANSCEIVER BASE STN. TRANSCEIVER.. FAX TML. TRANSCEIVER TML. TRANSCEIVER

19 WILL RADIO SPECTRUM FREQUENCY BAND MHz MHz MHz MHz MHz MHz TECHNOLOGY CT-2 / CAI IS -54 / IS -95 GSM DIGITAL MARR

20 WILL RADIO SPECTRUM--(cond..) FREQUENCY BAND MHz MHz MHz MHz MHz TECHNOLOGY DCS-1800 DECT PCS

21 INTERCONNECTION WLL - PSTN 1. ON VF BASIS SAME NUMBERING SCHEME BILLING BY PSTN 2. 2 Mbps USING V 5.1 INTERFACE SAME NUMBERING SCHEME, BILLING BY PSTN SAVES MDF & LINE CARDS 3. 2 Mbps USING V 5.2 INTERFACE SAME NUMBERING SCHEME, BILLING BY PSTN CONCENTRATION FACILITY

22 INTERCONNECTION (Cond.----) 4. 2Mbps USING PROPRIETARY PROTOCOL SAME NUMBERING SCHEME BILLING BY PSTN 5. 2Mbps USING STANDARD JUNCTION CONNECTION R2MF OR CCS7 DIFFERENT NUMBERING SEPERATE LEVELS FOR ‘PSTN’ & ‘WILL’ SEPARATE LINK BETWEEN ‘WILL’ & ‘PSTN’ FOR TRANSFERRING OF BILLING INFORMATIONS

23 PLANNING CRITERIA SELECTION OF SUBSCRIBERS AND AREA TO BE COVERED. -SYSTEM ENGINEERING OF WLL. - COVERAGE PREDICTION AND NETWORK OPTIMSATION WITH COMPURISED TOOLS - WLL SYSTEM MAY BE PLANNED FOR TNF URBAN AREAS HIGH REVENUE SUSCRIBERS LEASED VOICE BAND DATA CONNECTIONS 64 KBPS DATA FOR SPECIAL APPLICATIONS DIFFICULTY INLAYING CBLES e.g. CONGESTED MARKETS HAVING SMALL LANES & ROADS. CLUSTER OF HOUSING SOCITIES.

24 SERVICES SUPPORTED HAVING VOCODERS OF 8/13K ARE CAPABLE OF SUPPORTING -G-3 FAX UPTO 14.4KBPS, DATA SERVICES & VOICE. HAVING VOCODERS OF 32KBPS ADPCM ARE CAPABLE OF SUPPORTING -G-3 FAX, DATA SERVICES,VOICE & PAY PHONE.

25 WILL - ADVANTAGES FAST SERVICE PROVISIONING ---RAPID INSTALLATIONS FLEXSIBILITY IN PLANNING,EXPANSION & RECONFIGU. LESS FAULT PRONE -- NO PHYSICAL MEDIUM COST EFFECTIVE ---FAST DEPLOYMENT > EARLY ACCESS TO REVENUE & REDEPLOYMENT CUSTOMER INTERFACE -- REDUCED PROBLEMS HIGHLY SUITABLE FOR DIFFICULT, INACCESSIBLE TOPOGRAPHICAL CONDITIONS ( TNF CASES) HIGH BAND WIDTH SERVICES Kb/S & 2 Mb/S SAVES “COPPER”


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