Mobile Broadband Expansion Calls for More Spectrum or Base Stations - Analysis of the Value of Spectrum and the Role of Spectrum Aggregation

The breakthrough for mobile broadband is taking the mobile communications industry into a new phase. The number of mobile broadband users in the world exceeds 400 million, and the share of the population in Western Europe with mobile broadband is around 10 per cent and over 15 percent in Austria and Sweden. This development has been propelled by the extensive diffusion of mobile modems (dongles) for laptops and smartphones given users ubiquitous access to mobile internet. Consequently, traffic volumes in the mobile networks have grown immensely, and the mobile data traffic surpassed the mobile voice traffic in the world by the end of 2009, and in for example Sweden, over 75 percent of the mobile traffic is data. --

Business Innovation Strategies to Reduce the Revenue Gap for Wireless Broadband Services

Mobile broadband is increasing rapidly both when it comes to traffic and number of subscriptions. The swift growth of the demand will require substantial capacity expansions. Operators are challenged by the fact that revenues from mobile broadband are limited, just a few per cent of APRU, and thus not compensating for declining voice revenues, creating a so called "revenue gap". Concurrently, mobile broadband dominates the traffic, set to grow strongly. In this paper we analyze the potential of different strategies for operators to reduce or bridge the revenue gap. The main options are to reduce network costs, to increase access prices and to exploit new revenue streams. The focus in the paper is on cost & capacity challenges and solutions in the network domain. Operators can cooperate and share sites and spectrum, which could be combined with off-loading heavy traffic to less costly local networks. In the network analysis we illustrate the cost impacts of different levels of demand, re-use of existing base station sites, sharing of base stations and spectrum and deployment of a denser network. A sensitivity analysis illustrates the impact on total revenues if access prices are increased, whether new types of services generate additional revenues, and if it fills the revenue gap. Our conclusion is that the different technical options to reduce the revenue gap can be linked to business strategies that include cooperation with both other operators as well as with non-telecom actors. Hence, innovations in the business domain enable technical solutions to be better or fully exploited.Wireless Internet access, data traffic, revenues, network costs, spectrum, deployment strategies, HSPA, LTE, operator cooperation, value added services, NFC, B2B2C.

Mobile Broadband Expansion Calls for More Spectrum or Base Stations - Analysis of the Value of Spectrum and the Role of Spectrum Aggregation

The breakthrough for mobile broadband is taking the mobile communications industry into a new phase. The number of mobile broadband users in the world exceeds 400 million, and the share of the population in Western Europe with mobile broadband is around 10 per cent and over 15 percent in Austria and Sweden. This development has been propelled by the extensive diffusion of mobile modems (dongles) for laptops and smartphones given users ubiquitous access to mobile internet. Consequently, traffic volumes in the mobile networks have grown immensely, and the mobile data traffic surpassed the mobile voice traffic in the world by the end of 2009, and in for example Sweden, over 75 percent of the mobile traffic is data

Mittelschicht zwischen Abstiegsängsten und hoher Belastung

Der Begriff 'Mittelschicht' ist nicht leicht zu definieren. Die entsprechenden Einkommensgrenzen werden von den untersuchenden Institutionen unterschiedlich gesetzt. Ob allerdings das Einkommen als charakteristisches Unterscheidungsmerkmal ausreicht, ist fraglich. Einigkeit besteht unter den Autoren, dass es der Mittelschicht, einmal abgesehen von deren steuerlicher Belastung, nicht so schlecht geht, wie häufig in der Öffentlichkeit angenommen wird

Wohlstand und Wachstum

Die Zweifel wachsen, ob allein die Höhe und der Verlauf des Bruttoinlandsprodukts ausreichen, den Wohlstand einer Gesellschaft zu messen. Um diese Frage zu diskutieren, hatte der Deutsche Bundestag Anfang 2011 eine Enquete-Kommission eingerichtet, die im Frühjahr 2013 ihren Abschlussbericht vorgelegt hat. Dies nahmen die Akademie für Politische Bildung Tutzing und das ifo Institut zum Anlass, unter der Leitung von Dr. Wolfgang Quaisser, Akademie für Politische Bildung Tutzing, und Prof. Dr. Kai Carstensen, ifo Institut am 7. und 8. Juni 2013 eine Fachtagung zu organisieren, um die Ergebnisse zu diskutieren. Einige der dort vorgestellten Vorträge werden hier veröffentlicht

Measurement of the Omega_c Lifetime

We present the measurement of the lifetime of the Omega_c we have performed using three independent data samples from two different decay modes. Using a Sigma- beam of 340 GeV/c we have obtained clean signals for the Omega_c decaying into Xi- K- pi+ pi+ and Omega- pi+ pi- pi+, avoiding topological cuts normally used in charm analysis. The short but measurable lifetime of the Omega_c is demonstrated by a clear enhancement of the signals at short but finite decay lengths. Using a continuous maximum likelihood method we determined the lifetime to be tau(Omega_c) = 55 +13-11(stat) +18-23(syst) fs. This makes the Omega_c the shortest living weakly decaying particle observed so far. The short value of the lifetime confirms the predicted pattern of the charmed baryon lifetimes and demonstrates that the strong interaction plays a vital role in the lifetimes of charmed hadrons.Comment: 15 pages, including 7 figures; gzipped, uuencoded postscrip

Search for the exotic Ξ−−(1860)\Xi^{--}(1860) Resonance in 340GeV/c Σ−\Sigma^--Nucleus Interactions

We report on a high statistics search for the $\Xi^{--}(1860)$ resonance in $\Sigma^-$-nucleus collisions at 340GeV/c. No evidence for this resonance is found in our data sample which contains 676000 $\Xi^-$ candidates above background. For the decay channel $\Xi^{--}(1860) \to \Xi^-\pi^-$ and the kinematic range 0.15$<x_F<$0.9 we find a 3$\sigma$ upper limit for the production cross section of 3.1 and 3.5 $\mu$b per nucleon for reactions with carbon and copper, respectively.Comment: 5 pages, 4 figures, modification of ref. 43 and 4

The Heavy Hadron Spectrum

I discuss the spectrum of hadrons containing heavy quarks ($b$ or $c$), and how well the experimental results are matched by theoretical ideas. Useful insights come from potential models and applications of Heavy Quark Symmetry and these can be compared with new numerical results from the ab initio methods of Lattice QCD.Comment: 64 pages, Latex, lectures at Schladming Winter School 199

Heavy Baryon Masses in the 1/mQ1/m_Q and 1/Nc1/N_c Expansions

The masses of baryons containing a single heavy quark are studied in a combined expansion in $1/m_Q$, $1/N_c$ and $SU(3)$ flavor symmetry breaking. Heavy quark baryon mass splittings are related to mass splittings of the octet and decuplet baryons. The $\Sigma_c^*$, $\Xi_c^\prime$ and $\Omega_c^*$ are predicted to the level of a few MeV. A number of bottom baryon mass splittings are predicted very accurately.Comment: 21 pages, REVtex, version to appear Phys. Rev.

Do bilateral social security agreements deliver on the portability of pensions and health care benefits? A summary policy paper on four migration corridors between EU and non-EU member states

This policy paper summarizes four corridor studies on bilateral social security agreements (BSSAs) between four EU Member and two non-Member States, draws conclusions on their results, and offers recommendations. BSSAs between migrant-sending and migrant-receiving countries are seen as the most important instrument to establish portability of social security benefits for internationally mobile workers. Yet only about 23 percent of international migrants profit from BSSAs and their functioning has been little analyzed and even less assessed. The four corridors studied (Austria-Turkey, Germany-Turkey, Belgium-Morocco, and France-Morocco) were selected to allow for comparison of both similarities and differences in experiences. The evaluation of these corridors' BSSAs was undertaken against a methodological framework and three selected criteria: fairness for individuals, fiscal fairness for countries, and bureaucratic effectiveness for countries and migrant workers. The results suggest that the investigated BSSAs work and overall deliver reasonably well on individual fairness. The results on fiscal fairness are clouded by conceptual and empirical gaps. Bureaucratic effectiveness would profit from ICT-based exchanges on both corridors once available