Economic viability of private commons: Framework and guidelines for profitability

Ongoing regulatory reforms have led to several novel spectrum sharing models under the general umbrella of dynamic spectrum sharing. The private commons model introduced by FCC in 2004 allows spectrum licensees to provide secondary access to spectrum on an opportunistic basis while retaining ownership. Since wireless communication systems are typically overprovisioned in order to deliver service-level guarantees to (primary) users under short-term load variations, this model bears significant potential by facilitating utilization of temporal and spatial surplus of capacity through serving secondary users at possibly different service levels. A potential barrier to adoption of the private commons model is the uncertainty about secondary price–demand relationship which is difficult to predict in an emerging market: A selected price for secondary access may be profitable for some values of secondary demand but not for others, leading to a profound uncertainty about ultimate benefit of spectrum sharing. This paper aims to eliminate such an uncertainty by devising concrete guidelines and methods for profitability. The paper establishes that the price of secondary spectrum access can be chosen to guarantee profitability for any value of secondary demand: It is shown that for both the coordinated and uncoordinated commons regimes a profitable price should exceed a threshold value, which can be calculated. Hence profitability of private commons is insensitive to the demand function. This observation has two complementary interpretations: From a business perspective it provides a constructive approach to profitability; and from a regulatory perspective it provides reassurance that private commons is a healthy model. The paper also leverages the insensitivity property and outlines a technique to further enhance revenue via iterative spectrum offerings.     

The unfinished history of usage rights for spectrum

The key task in the next stage of spectrum management is to adapt regulation to the prospect of widespread sharing, on a much more sophisticated basis than sharing is used today. There is a role for the regulator to take steps to expand the area of choice within which public and private sector users can operate. This is best done in general by enhancing the flexibility of usage rights, which itself is best achieved by enhancing the freedom to trade them in the dimensions of time, space, level of interference and priority of access, by subdividing, re-aggregating, etc. However, there are considerable transactions cost impediments to trading where unlicensed users are involved. This creates a role for the regulator pro-actively to investigate different allocations, to make provisions for the most promising to occur and to incorporate both in refarming exercises and in primary assignments based on auctions configurations of usage rights, which might favour promising avenues of shared spectrum use.     

Dynamic usage of narrowband spectrum

We examine the potential for expansion of the white space spectrum sharing model in the 400 MHz band. As opposed to UHF broadcast spectrum, which contains unassigned or idle segments known as white spaces, the 400 MHz band is characterised by intensive licence usage. However, productive spectrum usage does not guarantee allocative efficiency, which would require knowledge of the highest value service for each licence. 400 MHz frequencies are not priced on opportunity cost. It is therefore difficult to ascertain the economically efficient mix of services to deploy in the 400 MHz band. Drawing parallels with the high-economic value revealed and generated through the operations of unlicensed white space devices in UHF broadcast spectrum, we identify untapped 400 MHz spectrum capacity, which we refer to as narrowband spaces. Encouraging dynamic spectrum usage of narrowband spaces could, similarly to TV white space usage help realise the efficient allocation of the 400 MHz band. However, the narrowband nature of the 400 MHz licences and high licensing turnover imply a significantly different concept of dynamic spectrum access than that considered for TV Bands. The paper discusses regulatory implications and the type of services suited to exploit narrowband spaces.     

Emerging issues in white space regulation

The secondary use of vacant television channels (TV white spaces) and the reallocation of the digital dividend to provide wireless broadband services are in the final stages of implementation in some countries. Originally seen as a once in a generation opportunity to better allocate UHF spectrum, further digital dividends are now underway as regulators and industry strive to meet exponential increases in demand for mobile data services. Concurrent developments suggest that TV white spaces may be rapidly exploited by global networks with billions of supported devices. The potential for sub-optimal outcomes is identified if the prospect of further digital dividends is not taken into account as technical and regulatory arrangements are put in place to allow productive use of TV white spaces. The importance of considering the potential interaction between further digital dividends and the use of TV white spaces is discussed and technical and regulatory approaches to support optimal outcomes are identified.     

TV white spaces exploitation through a bicameral geo-location database

The exploitation of TV white spaces can meet the increasing demand for spectrum resources and create opportunities for deploying a variety of wireless services in a flexible manner. However, uncertainties from technologies, business models and regulatory policies hinder the take-off of TV white spaces exploitation. This paper proposes a bicameral (or two-chambered) geo-location database, which allows/supports both free and paid access to the TV white spaces: i.e., one chamber supports free access through opportunistic or geo-location database access; and the other chamber supports paid usage through secondary spectrum trading. Consequently, four technological scenarios for the acquisition of TV white spaces emerge, namely: sensing only, joint sensing and geo-location database access, geo-location database access only, and broker based secondary spectrum trading. An analysis of these scenarios is performed based on a theoretical framework for emerging technology evaluation while considering technological, business models and regulatory dimensions. The analyses show that free and paid access to TV white space complement each other; and that despite considerable infrastructure costs, the bicameral geo-location database is positioned to create viable TV white spaces exploitation value chains; hence have the most optimal technological, business and regulatory prospects.     

Beachfront commons

Technology competition between wireless communication technologies can lead to new, more or less disruptive services. A potentially disruptive technology would be to have unlicensed transmission in the lower UHF bands at power levels up to, e.g. 2 W EIRP. This would give citizens a share of the best spectrum for free use. Tools against congestion could be based on mandatory stochastic channel back-off or, if multiple users are present, on adaptive power and bandwidth control. Compared to the FCC TV white space regulation, no back link would be needed as the spectrum would be used exclusively by wireless devices. In an environment of shrinking interest in terrestrial TV broadcasting, such a regulation is expected to create a new market for high-range consumer devices, competing with licensed communication, while also being suitable for offloading traffic from licensed operations. Furthermore, the approach will allow for efficient digitization of equipment for Programme Making and Special Events (PMSE), but could also be made compatible with novel disaster relief services. To enable accurate interference prediction, it is proposed that, instead of only providing transmitter regulation, receivers should also be regulated, such as be required to adhere to a certain minimum selectivity. The proposal should be taken up in the WRC process.     

The rise of 5G technologies and systems: A quantitative analysis of knowledge production

The advent of a new generation of wireless communications has punctuated the dawn of every decade in recent times. Upgrades to mobile electronic systems represent faster and more robust capabilities of data transfer but bring with it a wide set of complementary changes as they are underpinned by harmonised specific spectrum bands, fresh international technical standards, new network operation requirements, innovative cellular devices as well as new services and a broader array of potential commercial use applications. This paper presents a systematic outline of the development of 5G-related research until 2020 as revealed by over 10,000 science and technology publications. The exercise addresses the emergence, growth, and impact of this body of work and offers insights regarding disciplinary distribution, international performance, and historical dynamics. Findings reveal the progressive growth of the 5G research over the years after original contributions in 2010 and point to a “take-off” around 2014. A set of stylised facts regarding this technology since its infancy are of interest to engineers, regulators and innovation strategists and policy-makers.     

Flexible spectrum management for mobile broadband services: How does it vary across advanced and emerging markets?

Demand for wireless data and Internet services are expected to grow exponentially, both in advanced and emerging markets in the near future. While advanced countries have often used centralized planning and coordination methodology to forecast and allocate the associated spectrum blocks to wireless operators for meeting the demand, it is often ad-hoc in emerging markets dictated by market forces. In this paper, Finland and India are taken to represent advanced and emerging markets, respectively. Different policy options and the policy environment in these two countries for spectrum management are explored. A causal model is constructed to represent the different variables that affect spectrum management practices and possible paths forward in these two extreme cases are highlighted. Using the causal model structure, it is hypothesized that (i) the matured markets such as Finland that practice centralized and harmonized spectrum planning are likely to continue their ex-ante policies and opt for the release of digital dividend spectrum and use of spectrally efficient technologies; (ii) the emerging market in India that is characterized by a market oriented ex-poste regulation is a good candidate to introduce secondary markets including flexible opportunistic spectrum access as exemplified by the wide spread adoption of multi-SIM handsets and the practice of national roaming by 3G service providers. Introductions of policies and regulations in these markets to break away from the extant paths are also highlighted.     

A dynamic policy license for flexible spectrum management

Electromagnetic spectrum for wireless communications is fully allocated by regulatory authorities, but this does not mean that it is fully utilized. Demand for greater capacity and new services requires new regulatory and technical models for spectrum sharing. This paper develops a regulatory model denoted the dynamic policy license. The dynamic policy license combines the assurances to licensees that come from holding a fixed license while maintaining regulatory flexibility. A dynamic policy license is similar to a traditional spectrum license that specifies a bandwidth, power, center frequency, location, and other parameters. However, one or more of these parameters is subject to change by the regulator over time. The allowed changes are restricted by the license to provide assurances and predictability to the licensee. The opportunities and challenges that this presents to both regulators and licensees is described. For instance, the dynamic policy license can be a regulatory tool for more aggressive spectrum sharing.     

Corporate Governance and Human Resource Management

This paper investigates the effect of different forms of corporate governance on the structure and nature of stakeholder relationships within organizations and the consequent impact on human resource management (HRM) policy and outcomes. The analysis shows that while performance advantages can be derived from commitment‐based HRM systems, a corporate governance regime that privileges remote stakeholders may operate as a constraint on such systems. The empirical analysis is based on the UK Workplace Employee Relations Survey (WERS98).     

Restructuring diversified telecom operators

The paper examines restructuring cycles among diversified major telecom operators from two different perspectives, the governance deficiency perspective of agency theory and the governance efficiency perspective of transaction cost economics, the former being less consistent with the spirit of recent pro-competitive regulatory reforms than the latter. This restructuring cycle describes how incumbent operators grew larger and more diversified during the telecom boom before they were transformed into more efficient scale and scope either by economizing managers or by market forces along with actively intervening owners and bondholders during the subsequent telecom bust. A cycle whose expansion phase is characterized by highly acquisitive companies expanding into non-related activities followed by a delayed contraction phase where overdiversified companies are being restructured by market forces and intervening owners and bondholders is consistent with the reform-non-compliant governance deficiency thesis of agency theory. A cycle whose expansion phase is characterized by acquisitive companies expanding into related activities followed by a contraction phase where companies are restructured by their own managers after having realized that previously acquired assets have become more redeployable and their services more tradable is consistent with the reform-compliant governance efficiency thesis of transaction cost economics. Now, in the aftermath of the contraction phase of the business cycle, more narrowly focused incumbents are once again ready for another round of acquisitive expansion. Anecdotal evidence from five restructuring cases, along with available secondary information about the development of the industry, seems to support the reform-noncompliant governance deficiency thesis of agency theory rather than the reform-compliant governance efficiency thesis of transaction cost economics.     

资源外包网络的治理研究

资源外包网络作为一种特殊的资源联合体,其运作过程并非十全十美,机会主义行为和知识分享问题及其引致的网络失灵成为网络治理的主要诱因。资源外包网络的治理包含两个层面:关系治理和结构治理。机会主义行为多发生于外包商和供应商双边交易过程中,对应于资源外包网络的关系治理;知识分享问题涉及网络整体的协调与管理,对应于网络的结构治理。论文分别从关系治理和结构治理两个角度剖析了资源外包网络的治理特点、作用机制和治理对策。     

On-line spectrum auctions in TV white spaces for supporting mobile services—A practical manual

This paper considers an approach for dynamic short-term spectrum leasing in TV white spaces (TVWS) using an on-line auction. The secondary spectrum market discussed here is organized by a central entity called the spectrum broker. The auctioned spectrum appears in blocks of available DVB-T channels with some transmit power constraints set-up to protect the primary users (DVB-T receivers). The bidders are institutional spectrum operators (telecommunication companies or service providers), operating in a given area. These players are characterized by heterogeneous demands concerning the spectrum bandwidth, the operation period with temporarily-exclusive rights for using the spectrum and the transmit power needed for successful transmission. Thus, the auctioned objects are non-identical and present different value for different players. Two auction models are proposed. The first one is the simultaneous auction in time domain and combinatorial in frequency and power dimension. The second proposed auction is fully combinatorial. Simulations results are also provided showing effectiveness of the analyzed auctions (high spectrum utilization ratio) and relation between the players’ satisfaction, their spectrum valuation and varying competition. Finally the guidelines concerning the spectrum auctions in TVWS for the policy makers are proposed.     

Internet of things and the economics of 5G-based local industrial networks

Fifth generation (5G) networks raise governance and management challenges that did not exist in 3G and 4G wireless technologies. Advanced wireless functionality enables new applications and services based on smart, physical, network infrastructures, many of them expected to be localized. As a general-purpose technology, 5G can be configured in numerous ways to support innovative applications across many sectors. Smart network applications and services must integrate physical and virtual components in innovative ways. In addition, general capabilities of 5G must be combined with complementary technologies, such as big data analytics and edge cloud services, to create services for specific use cases. Varying throughput and latency requirements of distinct use cases require differentiated technical solutions. Appropriate frequencies must be aligned efficiently with other features within the footprint of particular, local industrial networks. National policy makers, suppliers, and users are responding differently to these governance and management challenges. These approaches balance differently the trade-offs between experimentation, differentiation, and harmonization. Comparative analysis can inform gradual improvements of the governance of 5G-based, local industrial networks.     

Factors influencing the uptake of a mechatronics curriculum initiative in five Australian secondary schools

While the ready-made Lego™ Robotics kits are popular in schools and are used by students at both primary and secondary year levels, using the Picaxe microcontroller (chip) to create simple electronic devices, including robotic devices is less popular. The latter imposes an additional challenge as a result of the need to construct the universal board with the chip in it—a challenge embraced in the cross-disciplinary mechatronics program in this study. This paper reports on how teachers from five Australian secondary schools put into practice technological pedagogical content knowledge (TPCK) developed from expert-led workshops and explores factors (intrinsic and extrinsic) that influenced the implementation. The results show that different strategies were adopted by the schools in implementing the programs. While teacher attitude played an important role in influencing the program’s success, being able to identify where the program sits within the curriculum and planning around timetable and facility constraints were also important factors to consider. The research indicated that teachers’ TPCK was most challenged in non-obvious areas such as diagnosing where faulty soldering joints were.     

无线局域网中的直接序列扩频技术

介绍了 IEEE80 2 .1 1协议的主要内容 ,阐述了直接序列扩频 (DSSS)技术在无线局域网中的重要作用及优点。介绍了支持 80 2 .1 1协议的全数字化直接序列扩频处理芯片 ,分析了目前无线局域网中采用的 DBPSK,DQPSK,BMBOK,QMBOK,CCK扩频调制方式及性能。     

Alternative Corporate Governance Systems in Japanese Firms: Implications for a Shift to Stockholder-Centered Corporate Governance

In Asia, the recent catastrophic decline in regional stock markets, continuing currency crisis and failures of major financial institutions and industrial corporations have increased domestic and international interest in corporate governance. Nowhere is this greater than in Japan where financial institution reform has catapulted this to the fore. In this paper, we use agency theory and institutional theory, together with comparative case examples, to derive some propositions on the dynamics of changing corporate governance systems in Japanese firms. We argue for the co-existence of stakeholder and shareholder-centered corporate governance systems in Japan. This argument has an important implication for corporate governance research and agency theory. Namely, changes in ownership structure and institutional expectations would force firms to focus on maximizing shareholder value even where the interests of stakeholders are more emphasized. It suggests an environmental selection mechanism to ensure the emergence of appropriate corporate governance mechanisms to solve the agency problem. Further, the loss of competitiveness and the prolonged poor performance of firms can change the institutional norms to emphasize asset efficiency and transparency rather than stability and business ties.     

The spectrum policy reform paving the way to cognitive radio enabled spectrum sharing

The increasing amount of data and video traffic carried by mobile networks has recently risen the demand for enhanced network capacity, more efficient use and more effective management of spectrum. Cognitive radio technologies candidate to respond to these urgent needs by allowing a near simultaneous band sharing. The regulation plays a crucial role in promoting the adoption of these technologies, in order to overcome the traditional paradigms of authorizations for exclusive spectrum usage. The article outlines spectrum management regimes where the implementation of frequency sharing technologies, including cognitive technologies, is foreseeable and brings them back to a comprehensive taxonomy of dynamic spectrum access and sharing models, in the effort to reconcile partially diverging approaches and nomenclatures suggested in literature. Theoretic analysis is supported by a number of illustrations and practical experiments with shared spectrum usage. Based on suggested taxonomy, the research aims at showing the evolutionary path toward the introduction and spreading of cognitive and other spectrum sharing technologies, pointing out relevant trends and instruments made available by the reform of EU Telecom Package, as well as at outlining the status of regulation, policy and standardization in Europe.     

The impact of value congruence on marketing channel relationship

Organizational values guide acceptable behavior and provide motivational dynamism. Marketing channel literature has yet to address the impact of values on interfirm exchanges. We propose that value congruence between cooperating firms can be an effective governance method. This research examines the impact of value congruence between manufacturers and their primary distributors. Survey data from 278 manufacturing firms demonstrate that perceived value congruence has a positive effect on distributors' performance. Moreover, information sharing and joint problem solving serve as mechanisms that partially mediate the main effect. This research calls for integration of organizational values into partner selection and marketing channel governance.     

Betriebsoptimierung großtechnischer Kälteversorgungsverbunde bei limitierter Datengrundlage

Energy in the form of cold is required by many commercial and industrial companies in Germany. The demand ranges from space cooling to food refrigeration up to applications with very specific requirements, as it is the case with medical devices. From a certain size of the company, the cooling supply usually takes place in a central refrigeration network fed by several cooling units. The operation of several cooling units allows the individual systems to be controlled in such a way that they operate within the optimum range of operating. In practice, the primary goal is often only to cover the required cooling demand to ensure the underlying processes, so that there is a high potential for operational optimization. Existing models usually require lots of measurement points or historical data to model the efficiency behavior of cooling machines. Therefore, a methodological approach is presented in this work, which, on the one hand, models the efficiency profile of cooling units as a function of the ambient temperature and the utilization, and on the other hand, an energetically optimized schedule for the cooling units can be assessed underlying a limited data basis. The developed approach is subsequently applied to a specific application and validated.