ng the specifications. Thus they serve primarily as illustra- tions to visualize some of the impacts while designing actual UMTS networks. References 3GPP, Technical Specification Group (TSG) RUN WG4, UE Radio Transmission and Re- ception (FDD) (3G TS 25.101. version 3.1.0, 1999-12). 3GPP, Technical Specification Group (TSG) RUN WG4, UTRA (UE) TDD; Radio Trans- mission and Reception (3G TS 25.102. version 3.1.0, 1999-12). 3GPP, Technical Specification Group (TSG) RUN WG4, UTRA (BS) FDD; Radio Trans- mission and Reception (3G TS 25.104. version 3.1.0, 1999-12). 3GPP, Technical Specification Group (TSG) RUN WG4, UTRA (BS) TDD; Radio Trans- mission and Reception (3G TS 25.105. version 3.1.0, 1999-12). 3GPP, Technical Specification Group (TSG) Radio Access Networks; RF System Scenar- ios, Release 1999 (3G TS 25.942. Version 2.1.3, 2000-03). Pizarrosa, M., Jimenez, J. (eds.), "Common Basis for Evaluation of ATDMA and CODIT System Concepts", MPLA/TDE/SIG5/DS/P/001/b1, September 1995. "Universal Mobile Telecommunications System (UMTS); Selection Procedures for the Choice of Radio Transmission Technologies of the UMTS", TR 101 112 V3.1.0 (1997-11), UMTS30.03 version 3.1.0. The UMTS Network and Radio Access Technology: Air Interface Techniques for Future Mobile Systems Jonathan P. Castro Copyright © 2001 John Wiley & Sons Ltd Print ISBN 0-471-81375-3 Online ISBN 0-470-84172-9 SERVICE COMPONENTS IN UMTS BACKGROUND UMTS services will not only offer mobile services supported by 2nd generation systems such as GSM, but will also expand these services to higher rates and greater flexibility. The services evolving in the GSM platform through its Circuit Switched (CS) and Packet Switched (PS) services will continue in UMTS while new services are introduced. Thus, future UMTS services will have user transmission rates from low bit up to 2 Mbps. Although, high rates will occur primarily within indoor environments, there will be substantial increases in rates throughout all environments when compared to the typical 9.4 kbps. Table 6