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Figure 2The footprint of the RBS 2206 is one-halfthat of the RBS 2202. Thus, by upgradingto the RBS 2206, operators have spaceover for, say, a second unit that supportsthird-generation standards.BOX A, ABBREVIATIONS2G Second-generation mobile/wireless3GsystemThird-generation mobile/wirelesssystemCDU-FCDU-GdTRUDXUEDGECombiner and distribution unit (F)Combiner and distribution unit (G)Double transceiver unitDistribution switch unitEnhanced data rates for global evolutionGPRSGSMGeneral packet radio serviceGlobal system for mobile communicationHSCSDRBSRRUTRUHigh-speed circuit-switched dataRadio base stationRemote radio unitTransceiver unitWCDMA Wideband code-division multipleaccessWTRU WCDMA TRUGeneration 2.5In the interim before third-generation systemsare introduced, the RBS 2206 can aptlyfulfill several roles, since it provides full supportfor the technologies that pave the wayfor third-generation systems. The RBS 2206is• fully prepared for GSM data services, including14.4 kbit/s time slots, high-speedcircuit-switched data (HSCSD), and generalpacket radio service (GPRS); and• equipped with a powerful distributionswitch unit (DXU) and fastinternalbuses, which guarantee full EDGE supporton all time slots. Moreover, the DXUis prepared for Internet protocol-based(IP) A-bis transmission.Immediate benefitsThe RBS 2206 also offers several immediatebenefits to present-day GSM networks.Apart from having twice the capacity of itspredecessor, the RBS 2206 also gives improvedradio performance. For example, inaddition to standard, two-branch diversity,it supports four-branch receiver diversity,which improves the uplink with up to 4 dB.BOX B, THE RBS 2206Key features• Six double transceiver units (dTRU) for a totalof 12 transceivers• Hybrid combining one, two or three sectors inone cabinet• Filter combining one, two or three sectors inone cabinet• 35/16 W output power from cabinet (CDU-G)• 20 W output power from cabinet (CDU-F)• Synthesized and baseband frequency hopping• Prepared for data: 14.4 kbit/s, HSCSD, GPRS• Prepared for two-slot WTDUs• Supports 12 EDGE transceivers on all timeslots• All speech codes: HR, FR, EFR• Dual-band (GSM 900/GSM 1800)• Extended range 121 km• Supports software power boost• Prepared for IP-based transmission• Prepared for four-branch receiver diversity• Prepared for GPS-assisted positioning servicesTechnical specifications• Frequency band• Transmission (Tx)• Reception (Rx)• Dimensions• Weight (equipped)• Power intoantenna feeder• Receiver sensitivity• Power supplyE-GSM 900, GSM 1800925-960,1805-1880 MHz880-915,1710-1785 MHz1900x600x400 mm230 kg35 W (GSM 900)28 W (GSM 1800)-110 dBm120 to 250 VAC, 50/60 Hz-48 to -72 VDC+20 to +29 VDCEricsson Review No. 2, 2000
The combination of two unique features—Extended range 121 km, and four-branch receiverdiversity—gives almost immediaterural coverage at the lowest possible cost.The RBS 2206 also comes with two newcombiners—the CDU-F and CDU-G—which when compared to the combiners ofthe RBS 2202, increase output power by1 dB. Obviously, increased output powerimplies greater site-to-site distance. Thus,compared to the RBS 2202, networks builtwith the RBS 2206 require approximately15% fewer sites (Figure 4).The CDU-G combiner can be configuredin either capacity or coverage mode. In coveragemode, its output power is increased by3 dB to 35 W, making it ideal for rural sitesor roll-outs where speed or cost is a key factor.Because it is fully compatible withEricsson's RBS 2202, the RBS 2206 canquickly and easily be implemented in present-daynetworks. The RBS 2206 will becomecommercially available during thefirst quarter of 2001. EDGE functionalitywill be introduced a few months later. Theplug-in WTRU will be offered for deploymentin 2002.ConclusionThe RBS 2206 gives operators flexible entryinto the world of third-generation systems.Having the same footprint as the RBS 2202but double the capacity, the RBS 2206 freesup 50% of the cabinet space currently occupiedat base station sites. Operators canuse this extra space to install a thirdgenerationbase station; for example, theWCDMA macro-base station/RBS 3202.The RBS 2206 is fully prepared for EDGEand WCDMA. To add WCDMA functionality,operators need only plug in aWCDMA transceiver unit and remote radiounit. Thus, because major site investmentscan be reused, the RBS 2206 gives operatorsrapid, low-cost roll-out of a thirdgenerationnetwork.Figure 3The RBS 2206 can be expanded to supportWCDMA using a plug-in WTRU andremote radio unit.Figure 4The increased site-to-site distance affordedby the CDU-F combiner means thatcomparedto the RBS 2202—networksbuilt with the RBS 2206 require approximately15% fewer sites.Ericsson Review No. 2, 2000
Page 1: Ericsson 2/2000REVIEWTHE TELECOMMUN
Page 4 and 5: ContributorsIn this issueLuis Barri
Page 6 and 7: Ericsson Review is also published o
Page 8 and 9: Evolving from cdmaOne to third-gene
Page 10 and 11: Figure 2Operators Harmonization Agr
Page 12 and 13: more features, and greater reliabil
Page 14 and 15: Figure 7Ericsson's third-generation
Page 16 and 17: Figure 11Ericsson's timeline for ev
Page 18 and 19: Third-generation TDMAChristofer Lin
Page 20 and 21: TABLE 1 MODULATION AND CODING SCHEM
Page 22 and 23: Figure 3An example of a cell patter
Page 24 and 25: Figure 5Curves illustrating maximum
Page 26 and 27: TABLE 3. DYNAMIC PACKET DATA SIMULA
Page 28 and 29: erage can be achieved in existing c
Page 30 and 31: Business solutions for mobile e-com
Page 32 and 33: Figure 2Comparison of traditional a
Page 34 and 35: BOX B, THE E-COMMERCE TIMELINE1999E
Page 36 and 37: Figure 6Mobile e-Pay end-user servi
Page 38 and 39: Figure 8Access features with push-a
Page 40 and 41: AuthenticationTo verify that end-us
Page 42 and 43: BOX C, MARKET HARMONIZATIONOn Tuesd
Page 46 and 47: Communications security in an all-I
Page 48 and 49: BOX B, SYMMETRIC KEY SYSTEMSGood sy
Page 50 and 51: Figure 4Construction of an ESP-prot
Page 52 and 53: Figure 7An X.500 database structure
Page 54 and 55: Figure 9GPRS VPN scenarios.Figure 1
Page 56 and 57: TRADEMARKSRC4 and RC4 are registere
Page 58 and 59: HIPERLAN type 2 for broadband wirel
Page 60 and 61: Figure 3Typical usage of communicat
Page 62 and 63: Figure 6Mapping of higher layer pac
Page 64 and 65: TABLE 1PHYSICAL LAYER MODES OF HIPE
Page 66 and 67: Queen City WaterfrontEMERGING PROJE
Page 68 and 69: TABLE 2. IMPORTANT PARAMETERS FOR N
Page 70: Previous issuesNo. 1,2000IPv6—The

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