focuses on the latter aspect and compares different algorithms for the uplink frequency offset estimation in LTE Base Stations (eNodeB). A frequency-domain maximum-likelihood based solution is proposed, taking profit of the available interference-free OFDM symbols de-mapped (or de-multiplexed) at the output of the FFT of an OFDMA multi-user receiver.
Taiwan’s experiences in promoting third generation (3G) wireless Internet access service are interest to international practitioners and researchers. This study applies the logistic, Gompertz, and external influence econometric models to explore diffusion patterns of 3G wireless Internet service adoption in Taiwan, one of the leading countries in the mobile telephone context.
Given that no all new mobile telecommunications technology are accepted by the mass market, this study aims to understand the mass adoption of third-generation (3G) mobile phones that is hypothesized to comprise three consumer perceptions: new technology, new service, and new handset.
Impact of 3G and beyond technology development and pricing on mobile data service provisioning, usage and diffusion Abstract__This study investigates the third generation mobile telecommunication systems (3G) diffusion challenges in the situation where large-scale mobile data service usage has not yet broken through. The paper first analyzes incumbent mobile operator business prospects in a large Western-European country. The results suggest that rollout of the most advanced available 3G technologies pay back through increased data service usage and revenues in the situation of declining voice revenues. In the main body of the study we discuss different pricing models and demonstrate that the flat rate pricing of data services, supplemented with certain conditions, supports the large-scale take-up of mobile data services. It boosts the usage of mobile data services and provides a competitive and sustainable business model for the operators and other market actors at the same time. Our modeling indicates furthermore, that flat rate model, combined with open access, gives better incentives to rollout high-speed mobile technologies to the rural areas, than the traffic-based charging.
Improvement of Vehicular Communications by Using 3G Capabilities to Disseminate Control Information
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Cellular networks have gained a lot of popularity in the context of vehicular communication within the last few years. Existing reference architectures such as CALM already consider them to provide enhanced connectivity to vehicles for data communication. Their capabilities, especially 3G and next-generation, translate into great potential in the vehicular environment, far beyond the provision of data connectivity. In this context we present a solution that uses 3G cellular networks not only as a backup for data communication among vehicles, but also and especially as an efficient mechanism for the dissemination of relevant control information for multiple applications, services, and protocols. Our simulation results demonstrate that by using our 3G-based solution to disseminate connectivity information, vehicular ad hoc routing protocols improve their route selections, which results in a higher packet delivery ratio in urban scenarios.
Compared to other wired networks, complexity in the 3G UMTS is due its interactions with different entities. Within the UMTS, services have to deal with a great number of different QoS, small user display, variant bandwidth and small battery power. Most of the services are generally bind to the particular systems or APIs.
Influence of the Packet Size on the One-Way Delay on the Down-link in 3G Networks Abstract—The number of mobile broadband users is increasing. Furthermore, these users have high expectations into the capabilities of mobile broadband, comparable to those in fixed networks. On the other hand, the capacity assignment process on mobile access links is far from transparent to the user, and its properties need to be known in order to minimize the impact of the network on application performance. This paper investigates the impact of the packet size on the characteristics of the oneway delay for the down-link in third-generation mobile networks. For interactive and real-time applications such as VoIP, one-way delays are of major importance for user perception; however, they are challenging to measure due to their sensitivity to clock synchronization. Therefore, the paper applies a robust and innovative method to assure the quality of these measurements. We focus on the down-link as this is still the link that carries the most traffic to the user, and the quality of it will have a significant impact on all IP-based services. Results from measurements from several Swedish mobile operators reveal the possibility to partly control one-way delay and its variability by choosing appropriate packet sizes. In particular, packet sizes leading to the use of WCDMA entail significant but hardly varying one-way delays. On the other hand, we also show that HDSPA networks can deliver large amounts of data at rather high speed, but the cost is a huge variability in the one-way delay.
The influence factors to 3G mobile phone's use according to Technology Acceptance Model (TAM). Additionally, this paper build hypotheses model, analyze the factors of this behavioral intentions which consumers use 3G mobile phones and discuss the four factors' influence to the 3G mobile phones use of behavioral intentions.
Institutional environment and complementary assets: Business strategy in China
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This paper develops a framework to assess the influences of institutions and markets on the business strategy of firms in transition economies. We argue that regulatory systems and markets in transition economies are interdependent. Their changing conditions will interact and influence the types of partnerships in new market entry. Using a case study approach based on historical data and interviews, we show how China’s telecommunications industry evolved between 1987 and 2007, and led to the development of a 3G (third generation mobile telecommunications) standard and networks. Our analysis based on the framework explains how regulative elements and market conditions shape the strategic choices of partnerships between domestic and foreign firms when entering China’s 3G market.
Integrated Dual-Display-Based 3G Mobile Phone/ Wireless Terminal Abstract__ In this paper, we describe HW and SW features of the developed prototype of a hybrid 3G mobile phone and wireless terminal, which provides integral video projection onto two VGA/2 displays that, when put side-by-side, form the integrated display with the ratio of the overall width to its overall height, equal to 4:3, so providing the integral video VGA format and enabling visual presentation of standard full-size web pages, PC mainstream SW screens (such as e.g. the ones of e-mail clients),multi-media content etc. When not in use, the displays can be fold back one onto each other, so preserving the industry-standard dimensions of the device. The two displays that share the image provide it with overall resolution of 640 x 480 pixels per inch. The device is driven by Texas Instruments OMAP 2420 multimedia processor with ARM1136 core and Linux operating system. In addition, the device is equipped with specially developped prototypes of unique spring/microgenerator-based battery charger as well as with ultra-thin mountable foil-based QWERTY keyboard.
