Abstract—In the future communication applications, users may obtain their messages that have different importance levels distributively from several available sources, such as distributed storage or even devices belonging to other users. This scenario is the best modeled by the multilevel diversity coding systems (MDCS). To achieve perfect (INformation-theoretic) secrecy against wiretap channels, this paper investigates the fundamental limits on the secure rate region of the asymmetric MDCS (AMDCS), which include the symmetric case as a special case. Threshold perfect secrecy is added to the AMDCS model. The eavesdropper may have access to any one but not more than one subset of the channels but know nothing about the sources, as long as the size of the subset is not above the security level. The question of whether superposition (source separation) coding is optimal for such an AMDCS with threshold perfect secrecy is answered. A class of secure AMDCS (S-AMDCS) with an arbitrary number of encoders is solved, and it is shown that linear codes are optimal for this class of instances. However, in contrast with the secure symmetric MDCS, superposition is shown to be not optimal for S-AMDCS in general. In addition, necessary conditions on the existence of a secrecy key are determined as a design guideline.
标签： Fundamental Limits Secure Class on of
上传时间： 2020-01-04
上传用户：kddlas
Smart Grids provide many benefits for society. Reliability, observability across the energy distribution system and the exchange of INformation between devices are just some of the features that make Smart Grids so attractive. One of the main products of a Smart Grid is to data. The amount of data available nowadays increases fast and carries several kinds of INformation. Smart metres allow engineers to perform multiple measurements and analyse such data. For example, INformation about consumption, power quality and digital protection, among others, can be extracted. However, the main challenge in extracting INformation from data arises from the data quality. In fact, many sectors of the society can benefit from such data. Hence, this INformation needs to be properly stored and readily available. In this chapter, we will address the main concepts involving Technology INformation, Data Mining, Big Data and clustering for deploying INformation on Smart Grids.
标签： Processing Cities Smart Data in
上传时间： 2020-05-23
上传用户：shancjb
Smart Grids provide many benefits for society. Reliability, observability across the energy distribution system and the exchange of INformation between devices are just some of the features that make Smart Grids so attractive. One of the main products of a Smart Grid is to data. The amount of data available nowadays increases fast and carries several kinds of INformation. Smart metres allow engineers to perform multiple measurements and analyse such data. For example, INformation about consumption, power quality and digital protection, among others, can be extracted. However, the main challenge in extracting INformation from data arises from the data quality. In fact, many sectors of the society can benefit from such data. Hence, this INformation needs to be properly stored and readily available. In this chapter, we will address the main concepts involving Technology INformation, Data Mining, Big Data and clustering for deploying INformation on Smart Grids.
标签： Processing Cities Smart Data
上传时间： 2020-05-25
上传用户：shancjb
The concept of smart cities emerged few years ago as a new vision for urban development that aims to integrate multiple INformation and communication technology (ICT) solutions in a secure fashion to manage a city’s assets. Modern ICT infrastructure and e-services should fuel sustainable growth and quality of life, enabled by a wise and participative management of natural resources to be ensured by citizens and government. The need to build smart cities became a requirement that relies on urban development that should take charge of the new infrastructures for smart cities (broadband infrastructures, wireless sensor networks, Internet-based networked applications, open data and open platforms) and provide various smart services and enablers in various domains including healthcare, energy, education, environmental management, transportation, mobility and public safety.
上传时间： 2020-05-25
上传用户：shancjb
The rapid growth of the Web in the past two decades has made it the larg- est publicly accessible data source in the world. Web mining aims to dis- cover useful INformation or knowledge from Web hyperlinks, page con- tents, and usage logs. Based on the primary kinds of data used in the mining process, Web mining tasks can be categorized into three main types: Web structure mining, Web content mining and Web usage mining.
上传时间： 2020-05-26
上传用户：shancjb
This book provides technical INformation about all aspects of 3GPP LTE. The areas covered range from basic concepts to research-grade material, including future directions. The book captures the current state of 3GPP LTE technology and serves as a source of comprehensive reference material on this subject. It has a total of 12 chapters authored by 50 experts from around the world. The targeted audi- ence includes professionals who are designers or planners for 3GPP LTE systems, researchers (faculty members and graduate students), and those who would like to learn about this field.
标签： Technology Cellular Radio 3GPP LTE and
上传时间： 2020-05-26
上传用户：shancjb
Mobile communication devices like smart phones or tablet PCs enable us to consume INformation at every location and at every time. The rapid development of new applications and new services and the demand to access data in real time create an increasing throughput demand. The data have to be transmitted reliably to ensure the desired quality of service. Furthermore, an improved utilization of the bandwidth is desired to reduce the cost of transmission.
标签： Architectures Processing Baseband Signal for
上传时间： 2020-05-26
上传用户：shancjb
The past decades have witnessed wide demand and applications for wireless commu- nications in the human body area, that is, in the immediate environment around a human body. These demands and applications especially focus on wireless transmis- sion and networking of personal INformation for user identification, healthcare and medical applications.
标签： communications modeling channel Body area
上传时间： 2020-05-26
上传用户：shancjb
During the past two decades, technological development related to telecommuni- cation technologies has allowed organizations of all types and size to be able to de- velop effective networking applications in support of INformation management. Fur- thermore, telecommunication technologies combined with computer technology have created the foundation of modern INformation technology which has affected all as- pects of societal and organizational functions in our modern world.
标签： Telecommunications Cases on
上传时间： 2020-05-26
上传用户：shancjb
The very title of this book is borrowed from the INformation theory vocabulary, and, quite naturally, it is an outline of this theory that will serve as an introduction. The subject of INformation theory is the scientific study of communications. To this end it defines a quantitative measurement of the communicated content, i.e. informa- tion, and deals with two operations essential for communication techniques: source coding and channel encoding.
标签： Communication Networks Channel Coding in
上传时间： 2020-05-26
上传用户：shancjb
