Lecture 10
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TETRA is a trunked radio standard used in public safety networks. It allows for fast call setup, voice and data services, and operates in both infrastructure and ad-hoc modes. UMTS is the 3G cellular standard developed by ETSI for wide-area mobile communication. It uses W-CDMA technology and supports high data rates through variable spreading factors and orthogonal codes. UMTS has an architecture with domains for the user equipment, access network, core network and home network connected by defined interfaces.
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Lecture 10
- 2. TETRA – Contracts by Sector (percentage) TETRA – Contracts by Sector (percentage) Used in over 70 countries, more than 20 device manufacturers
- 3. TETRA – Network Architecture TETRA infrastructure BS BS switch switch switch NMS BS other TETRA networks PSTN, ISDN, Internet, PDN DMO ISI PEI AI AI: Air Interface BS: Base Station DMO: Direct Mode Operation ISI: Inter-System Interface NMS: Network Management System PEI: Peripheral Equipment Interface
- 7. TDMA structure of the voice+data system 0 1 2 57 58 59 ... hyperframe 0 1 2 15 16 17 ... multiframe 0 1 2 3 0 slot 509 frame 14.17 ms 56.67 ms 1.02 s 61.2 s CF Control Frame
- 13. IMT-2000 family IMT-DS (Direct Spread) UTRA FDD (W-CDMA) 3GPP IMT-TC (Time Code) UTRA TDD (TD-CDMA); TD-SCDMA 3GPP IMT-MC (Multi Carrier) cdma2000 3GPP2 IMT-SC (Single Carrier) UWC-136 (EDGE) UWCC/3GPP IMT-FT (Freq. Time) DECT ETSI GSM (MAP) ANSI-41 (IS-634) IP-Network IMT-2000 Core Network ITU-T IMT-2000 Radio Access ITU-R Interface for Internetworking Initial UMTS (R99 w/ FDD) Universal Terrestrial Radio Access 3G-Partnership Project Flexible assignment of Core Network and Radio Access
- 14. GSM and UMTS Releases 1992 3.x.y Ph1 - Phase 1 1995 4.x.y Ph2 - Phase 2 early 1997 5.x.y R96 - Phase 2+ Release 1996 early 1998 6.x.y R97 - Phase 2+ Release 1997 early 1999 7.x.y R98 - Phase 2+ Release 1998 8.x.y - Phase 2+ Release 1999 March 2000 3.x.y R99 Release 1999 - 9.x.y - Phase 2+ Release 2000 Renaming… 4.x.y R00 Release 2000 - March 2001 4.x.y Rel-4 Release 4 Phase 2+ Release 4 March - June 2002 5.x.y Rel-5 Release 5 Phase 2+ Release 5 December 2004 - March 2005 6.x.y Rel-6 Release 6 Phase 2+ Release 6 Freeze date (indicative only) Spec version number Abbreviated name 3G Release GSM/EDGE Release
- 19. OSVF coding (Orthogonal Variable Spreading Factor) 1 1,1 1,-1 1,1,1,1 1,1,-1,-1 X X,X X,-X 1,-1,1,-1 1,-1,-1,1 1,-1,-1,1,1,-1,-1,1 1,-1,-1,1,-1,1,1,-1 1,-1,1,-1,1,-1,1,-1 1,-1,1,-1,-1,1,-1,1 1,1,-1,-1,1,1,-1,-1 1,1,-1,-1,-1,-1,1,1 1,1,1,1,1,1,1,1 1,1,1,1,-1,-1,-1,-1 SF=1 SF=2 SF=4 SF=8 SF=n SF=2n ... ... ... ...
- 24. Typical UTRA-FDD uplink data rates 4 8 16 64 Spreading 15 15 15 15 DPCCH [kbit/s] 960 480 240 60 DPDCH [kbit/s] 384 144 64 12.2 (voice) User data rate [kbit/s]