检索结果-内蒙古大学图书馆

IEEE International Conference on Computer and Communication Engineering Technology (CCET)

作者： Alireza Mazinani Qiang Gao School of Electronic and Information Engineering BeiHang University Beijing China

ISBN: (纸本)9781538674383

Physical-layer network coding (PNC) can reduce the required number of transmission time slots and increase network throughput. This study combines decode-and-forward (DF) and denoise-and-forward (DNF) in half-duplex two-way relay network (TWRN) using orthogonal offset quadrature phase shift keying (O-OQPSK) modulation under additive white Gaussian noise (AWGN) channels. This approach improves wireless network throughput by two and four times compared to ordinary PNC and conventional network coding schemes, respectively. First, we design the relay decoder in the denoise and decode forward (DNDF)-TWR scheme, relay denoising mapping and decoding functions in the TWR scheme, and decoder using the maximum likelihood (ML) principle. Then we analyse the relay bit error rate (BER) and end-to-end BER of the DNDF-TWR scheme with O-OQPSK modulation. Simulation results show that the BER performance of the DNDF-TWR scheme is better than that of DNF-TWR and DF-TWR schemes.

关键词： Relays Decoding Bit error rate Throughput network coding Phase modulation

来源：评论

学校读者我要写书评

暂无评论

Hierarchical Layer Selection with Low Overhead in Prioritized network coding

Hierarchical Layer Selection with Low Overhead in Prioritize...

引用

IFIP networking Conference

作者： Marie Schaeffer Roman Naumann Stefan Dietzel Björn Scheuermann Humboldt-Universität zu Berlin Germany

ISBN: (纸本)9781538662809;9783903176089

network coding simplifies routing decisions, improves throughput, and increases tolerance against packet loss. A fundamental limitation, however, is delay: decoding requires as many independent linear combinations as data blocks. Prioritized network coding reduces this delay problem by introducing a hierarchy of prioritization layers. What remains is the problem of choosing a layer to approach two often-contradicting goals: reduce delay until prioritized layers can be decoded and keep the total number of transmissions low. In this paper, we propose an algorithm for this problem that - based on limited feedback - primarily minimizes per-layer delay but identifies opportunities to reduce the required transmissions when per-layer delay is unaffected. Our evaluation shows that our algorithm improves per-layer delay compared to hierarchical network coding and is close to the theoretical optimum number of total transmissions.

关键词： Delays Decoding network coding Encoding Receivers Protocols Throughput

来源：评论

学校读者我要写书评

暂无评论

Public Auditing for network coding Based Secure Cloud Storage

Public Auditing for Network Coding Based Secure Cloud Storag...

引用

IEEE International Conference on Trust, Security and Privacy in Computing and Communications (TrustCom)

作者： Xiang Liu Jie Huang Guowen Zong Schoole of Information Science and Engineering Southeast University Nanjing China

This paper investigates the intrinsic relationship between secure network coding and secure cloud storage. We propose a novel homomorphic signature scheme and then illustrate a method to construct the network coding based secure cloud storage (NCSCS) protocol, wherein the security of the homomorphic signature scheme is the foundation of the NCSCS protocol. By employing network coding and homomorphic signature technique, the proposed NCSCS system can serve as both cloud service provider and router of a communication network at the same time, where the public auditing of the outsourced data is enabled. Finally, we perform the simulation of the proposed protocol and evaluate its performance. The security and efficiency can be validated from the simulation results.

关键词： Cloud computing Security network coding Secure storage Protocols Encoding Law

来源：评论

学校读者我要写书评

暂无评论

Routing Strategy Based on network coding Under Energy Constraint in MDTN

Routing Strategy Based on Network Coding Under Energy Constr...

引用

International Conference on Communication Software and networks, ICCSN

作者： Yajuan Li Xiangyu Bai Xiaojuan Zhang College of Computer Science–College of Software Engineering Inner Mongolia University Hohhot China

The mobile delay tolerant network has some features results in transmit message is limited in one touch. In order to transmit more messages in one touch, network encoding technology is introduced. It effectively improves this problem. The mobile devices in the mobile delay tolerant network have the advantages of mobility, portability, but there are also problems, such as: limited energy, node sociality. When the energy of the node in the network is exhausted, it will affect the performance of the network. Therefore, the introduction of energy management strategies into the network coding routing strategy is of great significance to the performance improvement of the mobile delay tolerant network. In this paper, through the ONE to achieve the routing strategy proposed in this paper, and then compared with some existing routing strategy. Experimental results show that the routing strategy proposed in this paper can effectively improve the rate of message delivery, reduce delay, and reduce network overhead.

关键词： network coding Routing Encoding Energy states Delays Energy management Heuristic algorithms

来源：评论

学校读者我要写书评

暂无评论

The Probability Density Function for network coding with Three Input Flows

The Probability Density Function for Network Coding with Thr...

引用

International Conference on Computers, Communications, and Systems (ICCCS)

作者： Xiangrong Liu Yaping Liang Qing Chang Xianxu Li National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics Beijing China School of Electronic Information Engineering Beihang University Beijing China State grid information & communication branch Beijing China

ISBN: (纸本)9781538663516

Now many researches have been studying the optimization between throughput/energy consuming and delay with a couple of independent input flows in network coding (NC). However, the implementation of network coding (NC) requires a thorough investigation of its impact on relevant queueing systems which little work focuses on. In this paper, the scenario with three independent Poisson input flows based on our previous work about the pdf with two independent Poisson input flows., and one output flow is considered. The asynchronous NC-based strategy is that a new arrival evicts a head packet holding in its queue when waiting for another packet from the other flow to encode. The three flows are divided into two parts for getting the probability density function (pdf) of the output flow. The pdf for the output flow which contains both coded and uncoded packets is derived. Besides, the statistic characteristics of this strategy are analyzed. These results are verified by numerical simulations.

关键词： Probability density function network coding Encoding Relays Merging Simulation Numerical simulation

来源：评论

学校读者我要写书评

暂无评论

Softwarization of network coding Functions and Logical Mapping to SDN

Softwarization of Network Coding Functions and Logical Mappi...

引用

International Symposium on networks, Computers and Communications (ISNCC)

作者： M. A. Vázquez-Castro L. M. Contreras-Murillo School of Engineering Autonomous University of Barcelona Spain Technology and Planning Transport IP and Interconnection Networks Telefónica I+D

It is becoming clear that softwarization and virtualization of networking entail fundamental changes in how networking industry can control or troubleshoot traffic flows or enforce network-wide policies. Also application developers bystander major changes, with new opportunities for fast development of innovative applications and services. network functions (NFs) are key building blocks to realise such potential. Indeed, NFs are currently subject of great development by diverse vendors for a large range of applications beyond traditional well known networking functionalities. Such new capabilities may benefit from flexible and scalable design as opposite to current blackbox view of NFs. In this paper we propose one such novel NF with flexible and scalable design. Our NF exploits the capabilities of the network coding (NC) concept to improve different metrics of service performance, hence resulting in a NC service that can be offered either to external customers or used as internal service by the network provider. Our main contribution is three-fold. First, we justify our approach of internal logical visibility of network coding functions (NCFs), which allows proprietary while interoperable NCFs. Second, we propose the modelling of NCFs internal logic in terms of their software functional architecture. Finally, we show that our functional logic naturally maps to softwarized network architectures, which in turn facilitates NCFs virtualization. We also discuss the applicability of our architectures to representative conceptual scenarios and identify next steps.

关键词： Encoding network coding Computer architecture Software Task analysis Decoding Noise measurement

来源：评论

学校读者我要写书评

暂无评论

Multi-technology vs Single-technology Architecture for network coding in VANETs

Multi-technology vs Single-technology Architecture for Netwo...

引用

IEEE Symposium on Computers and Communications

作者： Christian Gomes Miguel Luis Susana Sargento Andre Zuquete Rui Lopes Instituto de Telecomunicações Aveiro Portugal

The growing interest in vehicular networks (VANETs) is encouraging its deployment in new environments, for both safety applications and to provide Internet to its users. Vehicles can connect to others, or to the infrastructure, providing an Internet connection. The communication equipment placed in-side the vehicles may have multiple network interfaces of diverse technologies, such as IEEE 802.11p/WAVE, IEEE 802.11a/g/n (Wi-Fi) and cellular. For this purpose, multihoming and network coding can be used to provide high bandwidth and reliability to these services, reducing packet losses due to poor wireless signal quality, therefore improving the final Quality-of-Service (QoS). This work evaluates the impact of a Systematic network coding (SNC) approach in multihoming when the coding is applied over traffic incoming from multiple technologies, or from a single technology, depending on the entity responsible for the encoding process. The multi-technology architecture proposed in this work will be evaluated using different coding configurations (generation and buffer sizes) and by analyzing its impact on the packet loss recovery ratio. The comparative results show that the multi-technology approach has a better delivery ratio when compared to the single-technology, despite the small impact on the packet delay.

关键词： network coding Decoding Encoding Computer architecture Packet loss Reliability

来源：评论

学校读者我要写书评

暂无评论

Video distortion reduction with network coding and device-to-device communications

Video distortion reduction with network coding and device-to...

引用

IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Kui Xu Pengfei Wang Meng Wang Dongmei Zhang College of Communications Engineering Army Engineering University of PLA Nanjing China

In this paper, we propose a scheme of wireless multimedia network coded broadcast retransmission based on Device-to-Device (D2D), in which there are network coding conflicts and transmission conflicts between multiple terminal devices. For this reason, a novel instantly decodable network coding (IDNC) graph is constructed, in which all the feasible coding and non-transmission collision cases are shown in the graph. Based on the constructed IDNC graph, we design the optimal broadcast strategy for batch transmission and sliding window transmission, and propose a heuristic maximum weight network coding selection algorithm (MWSA-NC) to reduce the complexity of the optimal search algorithm. The simulation results show that compared with the traditional scheme, the proposed algorithm can greatly improve the throughput of the system, reduce decoding latency and reduce video stream distortion.

关键词： Device-to-device communication network coding Wireless communication Encoding Streaming media Base stations Throughput

来源：评论

学校读者我要写书评

暂无评论

Optimal finite length coding rate of random linear network coding schemes

arXiv

引用

arXiv 2018年

作者： Do-Duy, Tan Ángeles Vázquez-Castro, M. Department of Telecommunications and Systems Engineering School of Engineering Autonomous University of Barcelona Spain

In this paper, we propose a methodology to compute the optimal finite-length coding rate for random linear network coding schemes over a line network. To do so, we first model the encoding, re-encoding, and decoding process of different coding schemes in matrix notation and corresponding error probabilities. Specifically, we model the finite-length performance for random linear capacity-achieving schemes: non-systematic (RLNC) and systematic (SNC) and non-capacity achieving schemes: SNC with packet scheduling (SNC-S) or sliding window (SWNC). Then, we propose a binary searching algorithm to identify optimal coding rate for given target packet loss rate. We use our proposed method to obtain the region of exponential increase of optimal coding rate and corresponding slopes for representative types of traffic and erasure rates. Our results show the tradeoff for capacity-achieving codes vs non-capacity achieving schemes, since the latter trade throughput with delay, which is reflected in the decrease of the exponential slope with the blocklength. We also show the effect of the number of re-encoding times, which further decreases the slope. Copyright © 2018, The Authors. All rights reserved.

关键词： network coding

来源：评论

学校读者我要写书评

暂无评论

A Multi-path Transmission Method for Wireless Sensor network Based on network coding

A Multi-path Transmission Method for Wireless Sensor Network...

引用

International Conference on Virtual Reality and Intelligent Systems (ICVRIS)

作者： Fan Yu Jiangsu Open University Nanjing Jiangsu China

ISBN: (纸本)9781538680322

How to ensure high quality multi-path transmission is of great importance for wireless sensor network, hence, in this paper, we propose a novel multi-path transmission method based on network coding. Wireless sensor networks are made up of three types nodes, among which the base station records the data of each cluster from the gateways, and the sensor can collect data from external environment. Afterwards, wireless sensors receive information from the gateway, and send it to neighbor nodes. Afterwards, we propose a novel multi-path transmission model for wireless sensor network, which is represented as a directed hypergraph. To solve the issue of packet loss which is obtained by the high bit error rate, the actual number of packets transmitted by the source node is obtained. Then, we calculate the times of network coding, and the group numbers is randomly selected by the source code from the sensing area. Finally, the proposed algorithm can achieve lower transmission cost, energy consumption and time cost than other methods.

关键词： Wireless sensor networks Wireless communication network coding Logic gates Sensors Propagation losses Energy consumption

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：