Previous
UMTS Network Synchronisation
White Papers Business decisions taken in the early stages of UMTS/3G rollout will undoubtedly have a significant impact on the medium term viability of the business. Wireless operators are in the process of making a massive capital investment in UMTS licences...
[July 19, 2005, 6:00]
UMTS Security
White Papers The Universal Mobile Telecommunications System (UMTS) is one of the new 'third generation' mobile cellular communication systems. UMTS builds on the success of the 'second generation' GSM system. New services introduced in UMTS require new security...
[July 19, 2005, 6:00]
UMTS Overview
White Papers The Universal Mobile Telecommunications System (UMTS) as specified by the Third Generation Partnership Project (3GPP) was formally adopted by the ITU as a member of its family of IMT-2000 Third Generation Mobile Communication standards in November...
[March 23, 2005, 2:00]
UMTS Network Performance Modeling Service
White Papers This paper presents an executive summary of a UMTS Network Performance Modeling Service delivery. It presents the services which can be offered to UMTS Network operators, including non-Motorola customers.
[July 19, 2005, 0:00]
UMTS Training Assists U.A.E. In 3G Network Roll-Out
White Papers A Mobile Network Operator in the United Arab Emirates (U.A.E.has become the first operator in the Gulf region to move forward with deploying a UMTS network. Mason Communications was commissioned to deliver a series of UMTS Radio Planning and...
[July 19, 2005, 0:00]
UMTS/HSDPA Backhaul Bandwidth Dimensioning
White Papers This paper presents a simulation-aided approach for the dimensioning of the ATM-based iub interface in UMTS/HSDPA networks. Besides considering different user applications, as well as the peculiarities of the radio protocols above and within the...
[July 8, 2008, 1:01]
WLAN Vs. UMTS - The European Scene
White Papers This paper mainly looks at the different deployment schemes and rollout plans of UMTS and WLAN in Europe and the type of business models that operators and service providers are adopting. It also analyzes several competing or complementary...
[August 2, 2007, 4:50]
A Simulation Tool For Dimensioning And Performance Evaluation Of The UMTS Terrestrial Radio Access Network
White Papers This paper presents a simulation model of the ATM-based UMTS (Universal Mobile Telecommunications System) terrestrial radio access network. The efficient support of multiple traffic classes with different quality of service requirements (end-to-end...
[July 26, 2005, 6:00]
RF Transceiver Architectures For W-CDMA Systems Like UMTS: State Of The Art And Future Trends
White Papers The standardization phase for wideband CDMA systems like UMTS is running towards its finalization. As is typical for mobile communication systems standardizing, sufficient RF performance has been assumed and most efforts have been put to baseband...
[July 19, 2005, 6:00]
On The Impact Of GSM Encryption And Man-in-the-Middle Attacks On The Security Of Interoperating GSM/UMTS Networks
White Papers This paper discusses the impact of GSM encryption attacks, that recover the encryption key, and the man-in-the-middle attack on the security of networks, which employ UMTS and GSM base stations simultaneously.
[November 15, 2005, 23:00]
Adaptive Area Location Planning And Over-All Network Planning For Multi-Constrained UMTS Networks
White Papers UMTS network access has been shown as the predominant access technology to provide high-speed multimedia services in next -generation wireless cellular networks. The UMTS cellular network significantly differentiates itself from the traditional...
[July 19, 2005, 6:00]
Performance Of TCP Over UMTS Common And Dedicated Channels
White Papers Universal Mobile Telecommunications System (UMTS) is a third-generation cellular network that enables high-speed wireless Internet access. This paper investigates the performance of Transmission Control Protocol (TCP) over UMTS utilizing a common...
[January 15, 2008, 0:54]
GSM/UMTS/MMDS Amplifiers
White Papers An amplifier for GSM/UMTS/MMDS applications where the third order IM distortion has been reduced by two alternative injection techniques is presented. The first is the injection of the difference frequency of the two input signals in the amplifier...
[November 18, 2005, 0:00]
Large-Scale RTT Measurements From An Operational UMTS/GPRS Network
White Papers This paper presents some observations about TCP RTT as captured in the live traffic of an operational GPRS/UMTS network. The results are compared for GPRS and UMTS, and some methodological issues involved in performing this type of analysis are...
[November 22, 2005, 0:00]
ARROWS UMTS Test-Bed Description
White Papers The analysis of radio resource management (RRM) strategies in a UMTS network and the impact that these strategies have on the end-to-end behaviour of multimedia applications with Quality of Service (QoS) requirements is one of the topical...
[July 19, 2005, 6:00]
Software Reconfigurable Baseband ASSP For Dual Mode UMTS/WLAN 802.11b Receiver
White Papers In this paper, an application specific signal processor (ASSP) for dual mode baseband processing of UMTS and WLAN 802.11b signals is presented. Although both mobile communication standards are based on direct sequence spread spectrum (DS-SS...
[July 19, 2005, 6:00]
Linearity Considerations Of W-CDMA Front-Ends For UMTS
White Papers The signals used in UMTS have wide bandwidth and high crest factors. Circuit designers use sinusoids to design and simulate their building blocks. Formulas are presented relating the various distortion effects of the W-CDMA signals like adjacent...
[July 19, 2005, 6:00]
Optimizing UMTS Link Layer Parameters For A TCP Connection
White Papers The Transmission Control Protocol (TCP), the dominant protocol for end-to-end reliable data transmission will naturally be broadly used in mobile wireless systems and especially over UMTS. However UMTS also implements its own retransmission...
[January 15, 2008, 0:54]
Asymmetric Traffic Management In UMTS FDD With Additional Downlink Spectrum
White Papers Asymmetric services with higher downlink traffic load are expected to dominate the service request to be supported by the forthcoming mobile communication systems like UMTS. The assignment of additional downlink spectrum for UMTS has been...
[July 19, 2005, 6:00]
A Man-in-the-Middle Attack On UMTS
White Papers This paper presents a man-in-the-middle attack on the Universal Mobile Telecommunication Standard (UMTS), one of the newly emerging 3G mobile technologies. The attack allows an intruder to impersonate a valid GSM base station to a UMTS subscriber...
[July 19, 2005, 6:00]
