08-02-2012, 12:15 PM
Universal Mobile Telecommunication System (UMTS)
[attachment=17271]
General Model Description
Universal Mobile Telecommunications System (UMTS) is a Third Generation
(3G) wireless protocol that is part of the International Telecommunications
Union’s IMT-2000 vision of a global family of 3G mobile communications
systems. UMTS is expected to deliver low-cost, high-capacity mobile
communications, offering data rates up to 2-Mbps. The UMTS model suite
allows you to model UMTS networks to evaluate end-to-end service quality,
throughput, drop rate, end-to-end delay, and delay jitter through the radio
access network and core packet network. It can also be used to evaluate the
feasibility of offering a mix of service classes given quality of service
requirements. This model is available as part of the specialized model library.
The UMTS model of the packet wireless network is based on 3rd Generation
Partnership Project (3GPP) Release 1999 standards. The network architecture
of this release is divided into the radio access network (RAN) and the core
network as shown in Figure 33-1. The UMTS module models the UMTS RAN
and the UMTS functionality of the core network (see highlighted elements in
Figure 33-1). The radio access network for UMTS contains the User Equipment
(UE), which includes the Terminal Equipment (TE) and Mobile Terminal (MT),
and the UMTS Terrestrial Radio Access Network (UTRAN), which includes the
Node-B and Radio Network Controller (RNC).
UMTS uses Wideband Code Division Multiple Access (W-CDMA) access
scheme. This version of W-CDMA uses direct spread with a chip rate of
Mcps and a nominal bandwidth of 5 MHz. The model supports one of
W-CDMA’s two duplex modes: Frequency Division Duplex (FDD). Time Division
Duplex (TDD) is not supported. In FDD mode, uplink and downlink
transmissions use different frequency bands. The radio frame has a length of 10
ms and is divided into 15 slots. Spreading factors vary from 256 to 4 for an FDD
uplink and from 512 to 4 for an FDD downlink. With these spreading factors,
data rates of up to 2 Mbps are attainable.
[attachment=17271]
General Model Description
Universal Mobile Telecommunications System (UMTS) is a Third Generation
(3G) wireless protocol that is part of the International Telecommunications
Union’s IMT-2000 vision of a global family of 3G mobile communications
systems. UMTS is expected to deliver low-cost, high-capacity mobile
communications, offering data rates up to 2-Mbps. The UMTS model suite
allows you to model UMTS networks to evaluate end-to-end service quality,
throughput, drop rate, end-to-end delay, and delay jitter through the radio
access network and core packet network. It can also be used to evaluate the
feasibility of offering a mix of service classes given quality of service
requirements. This model is available as part of the specialized model library.
The UMTS model of the packet wireless network is based on 3rd Generation
Partnership Project (3GPP) Release 1999 standards. The network architecture
of this release is divided into the radio access network (RAN) and the core
network as shown in Figure 33-1. The UMTS module models the UMTS RAN
and the UMTS functionality of the core network (see highlighted elements in
Figure 33-1). The radio access network for UMTS contains the User Equipment
(UE), which includes the Terminal Equipment (TE) and Mobile Terminal (MT),
and the UMTS Terrestrial Radio Access Network (UTRAN), which includes the
Node-B and Radio Network Controller (RNC).
UMTS uses Wideband Code Division Multiple Access (W-CDMA) access
scheme. This version of W-CDMA uses direct spread with a chip rate of
Mcps and a nominal bandwidth of 5 MHz. The model supports one of
W-CDMA’s two duplex modes: Frequency Division Duplex (FDD). Time Division
Duplex (TDD) is not supported. In FDD mode, uplink and downlink
transmissions use different frequency bands. The radio frame has a length of 10
ms and is divided into 15 slots. Spreading factors vary from 256 to 4 for an FDD
uplink and from 512 to 4 for an FDD downlink. With these spreading factors,
data rates of up to 2 Mbps are attainable.
