this paper, we propose a distributed differential en/decoding scheme for Alamouti's orthogonal space-time code using in a cooperative system. The relay terminal operates in the decode-and-forward (DF) mode. The pr...
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ISBN:
(纸本)9781424405169
this paper, we propose a distributed differential en/decoding scheme for Alamouti's orthogonal space-time code using in a cooperative system. The relay terminal operates in the decode-and-forward (DF) mode. The proposed scheme does not require the knowledge of the channel state information (CSI) at either user or destination terminals.
With the rapid development of information technology, people have put forward higher requirements for the audio-visual experience and usage functions of conference spaces. The traditional, single-function conference r...
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ISBN:
(纸本)9798350391961;9798350391954
With the rapid development of information technology, people have put forward higher requirements for the audio-visual experience and usage functions of conference spaces. The traditional, single-function conference room configuration can no longer adapt to the diverse needs of modern work and interactive activities. How to achieve efficient management and control, seamless interconnection, and resource sharing of audio systems across spaces, while ensuring the acoustic characteristics and flexibility of each independent space, has become a core issue that needs to be urgently resolved in building a multi-hall, multi-functional conference room cluster. Based on the audio system project of the Academic Center of the Communication University of China, this paper proposes a solution for a conference room cluster audio system based on a distributed architecture. This solution not only overcomes the limitations of traditional systems in terms of scalability, collaborative work, and resource scheduling but also promotes lossless transmission, real-time processing, and adaptive configuration of audio signals. Thus, it ensures the consistency and high quality of the audio experience within the entire cluster, providing practical guidance for the design and optimization of future conference room audio systems.
As an effective and popular method to solve big data storage, computation and processing, distributed system has been a widespread hot issue for these years. With the continuous development of modern computer, network...
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ISBN:
(纸本)9781612846835;9781612846828
As an effective and popular method to solve big data storage, computation and processing, distributed system has been a widespread hot issue for these years. With the continuous development of modern computer, network and communication technology, distributed systems have also gained very huge development and have shown themselves some different forms in different times. Currently, there are some famous distributed system forms available for modern information processes and communication applications, such as web service, grid computing and cloud computing technology et al. In this paper, we mainly focus on studying the key issues of distributed system firstly, especially, for its beginning development phase, and then discuss the typical forms of the distributed system from its emergence, at the same time;we also show some important applications about up-to-date distributed system. Finally, we talk about the issues of challenges for up-to-date distributed system and the development trends of distributed system in the future.
An essential component of threshold cryptography is to generate a distributed key based on univariate symmetric polynomials, where a constant fraction of the players can reconstruct the key. We, however, with rigorous...
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ISBN:
(纸本)9781424462520
An essential component of threshold cryptography is to generate a distributed key based on univariate symmetric polynomials, where a constant fraction of the players can reconstruct the key. We, however, with rigorous proof of security, present a new distributed key generation (DKG) protocol, using bivariate symmetric polynomials. It is regarded as more efficient in computation, simpler and more flexible in applications, compared with other solutions.
作者:
Zhong ShiranWuhan Univ
Int Sch Software Spatial Informat & Digital Technol Dept Wuhan 430079 Peoples R China
The support of the OGC standard in ArcGIS Server 9.3 makes ArcGIS Server receive more attention and promotion. As a result of the universality of OGC standard, the distributed platforms based on ArcGIS Server can real...
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ISBN:
(纸本)9781424437092
The support of the OGC standard in ArcGIS Server 9.3 makes ArcGIS Server receive more attention and promotion. As a result of the universality of OGC standard, the distributed platforms based on ArcGIS Server can realize the further sharing of geographic information data on the Internet. This paper discussed emphatically the design of a distributed geographic information service platform based on ArcGIS Server 9.3 and OGC standard, the construction of the platform and the role of each part, as well as the service application in different forms.
The energy consumption of modern data centers is currently growing rapidly, due to the development of new services and the spread of the ICT (Information & Communication Technologies) in all areas of human life. I...
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ISBN:
(纸本)9781728171272
The energy consumption of modern data centers is currently growing rapidly, due to the development of new services and the spread of the ICT (Information & Communication Technologies) in all areas of human life. It causes a huge demand in new energy efficient computing technologies which would simultaneously improve data processing performance meeting the requirements of SLA.
Multi-access Edge computing (MEC) is a type of network architecture that provides cloud computing capabilities at the edge of the network. We consider the use case of video surveillance for an university campus runnin...
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ISBN:
(纸本)9781665462686
Multi-access Edge computing (MEC) is a type of network architecture that provides cloud computing capabilities at the edge of the network. We consider the use case of video surveillance for an university campus running on a 5-GMEC environment. A key issue is the eventual overloading of computing resources on the MEC nodes during peak demand. We propose a new strategy for distributed orchestration in MEC environments based on how load balancing strategies organize processing queue. Then, we elaborated a strategy for deadline-aware queueing prioritization that organizes requests based on pre-established thresholds. We introduce a simulation-based experimentation environment and conduct a number of tests demonstrating the benefit of our approach by reducing the number of referrals and improving the effectiveness in meeting deadlines.
Mobile cloud computing provides a novel e-commerce mode for organizations without any upfront. investment. Since cloud computing uses distributed resources in open environment, it is important to provide secure keys t...
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ISBN:
(纸本)9781509017249
Mobile cloud computing provides a novel e-commerce mode for organizations without any upfront. investment. Since cloud computing uses distributed resources in open environment, it is important to provide secure keys to share the data for developing cloud computing applications. To ensure a correctness of users' data in the cloud, we propose an effective and secure distributed model including a Self-Proxy Server (SPS) with self-created algorithm. The model resolves a communication bottleneck due to re-encryption of a shared data in the cloud whenever users are revoked. It offers to reduce security risks and protect their resources because a distributed SPS dynamically interacts with Key Manager (KM) when the mobile users take on cloud services. This paper presents a comprehensive mobile cloud design which provides an effective and secure cloud computing services on mobile devices.
Complex Event Processing (CEP) and Mobile Adhoc networks (MANETs) are two technologies that can be used to enable monitoring applications for Emergency and Rescue missions (ER). MANETs are characterized by energy limi...
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ISBN:
(纸本)9781467377010
Complex Event Processing (CEP) and Mobile Adhoc networks (MANETs) are two technologies that can be used to enable monitoring applications for Emergency and Rescue missions (ER). MANETs are characterized by energy limitations, and in-network processing or distributed CEP is one possible solution. Operator placement mechanism for distributed CEP has a direct impact on energy consumption. Existing operator placement mechanisms focus on static network topologies and are therefore inappropriate for MANETs scenarios. We propose a novel energy efficient decentralized distributed placement mechanism, designed to achieve fast convergence with minimal data transmission cost while achieving a near optimal placement assignment. We compare our decentralized placement mechanism with a centralized approach under different mobility scenarios. Furthermore, we evaluate the distributed CEP under different workload scenarios in order to gain additional insight into different performance characteristics of the system. Finally, we measure the impact of a simple placement replication scheme on the overall system performance in terms of delay and message overhead. Our decentralized placement mechanism achieves up to almost 50% lower message overhead compared to the centralized approach, and it has lower message overhead across different mobility scenarios compared to the centralized approach. The placement replication scheme achieves up to 51% lower delay compared to the decentralized placement mechanism with no replication.
Wireless location has received increasing attention in the last decade, and the introduction of distributed multi-antenna in 4G system has brought in extra information for high accuracy location. In this paper, a nove...
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ISBN:
(纸本)9781612846835;9781612846828
Wireless location has received increasing attention in the last decade, and the introduction of distributed multi-antenna in 4G system has brought in extra information for high accuracy location. In this paper, a novel antenna selection algorithm in distributed multi-antenna system is proposed. By analyzing the least square error of TDOA location method and its relationship with locations of antennas utilized, factors are designed to indicate this relationship, and then we can find the most proper antennas to locate the MS. Simulation results show that the proposed antenna selection algorithm outperforms the traditional methods, which indicates our antenna selection algorithm can be applied in distributed multi-antenna systems effectively.
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