期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到371篇文章
< 1 2 … 19 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Public Broadcasting for Nation Building:The Nigerian Television Authority Example 认领 引用
1
作者 Ramson Oloche Acheme Perpetua Ogechi Aondover +1 位作者 Sunday Ogbonna Mmesomachukwu Chukwuemeka Iloh 《Journalism and Mass Communication》 2026年第2期97-110,共14页
The Nigerian Television Authority,NTA,is the only Nigerian broadcast media facing constant disparaging criticism by contemporary Nigerian youths.However,these criticisms are mostly one-sided as they only point to the ... The Nigerian Television Authority,NTA,is the only Nigerian broadcast media facing constant disparaging criticism by contemporary Nigerian youths.However,these criticisms are mostly one-sided as they only point to the drawbacks of the state-owned television.Scholarly studies conducted into the media house have shown that the government-owned television has done more for the general public in terms of uniting the diverse Nigerian populace and promoting collective cultural heritage than any other agent in the country.Using the descriptive content analysis,and hinged on Development Media Theory,the paper attempts a justification of the NTA programmes as it uses Media Discourse Analysis to highlight the themes,programme formats,and types of programmes aired by NTA in a space of two years(2021-2023).The paper recommends,among other things,series of field researches to learn about their programme preferences and nuances of the contemporary Nigerian youth,particularly the Generation-Z and Generation-Alpha,and create a sustainable plan. 展开更多
关键词 broadcasting cultural heritage nation building normative theory state-owned media
暂未订购 下载PDF
Research on the Application of AI Technology in Chinese-English Translation for Live Sports Broadcasting 认领 引用
2
作者 Yao Lujia 《亚太科技文献通报》 2025年第10期27-39,共13页
This study explores the application of artificial intelligence(AI)technology in Chinese-English translation for live sports broadcasting,addressing the growing demand for real-time,high-quality multilingual communicat... This study explores the application of artificial intelligence(AI)technology in Chinese-English translation for live sports broadcasting,addressing the growing demand for real-time,high-quality multilingual communication in global sports events.Drawing on advancements in neural machine translation(NMT),automatic speech recognition(ASR),and text-to-speech(TTS)technologies,the paper examines key theoretical foundations,including self-attention mechanisms in Transformer models,real-time subtitle synchronization,and domain-specific terminology processing.It outlines primary application forms,such as cloud-based speech translation systems,end-to-end speech-to-speech modes,AI-assisted subtitle generation with human post-editing,and multilingual subtitle technologies,illustrated with sports scenarios like football and basketball matches.Representative cases from international events(e.g.,NBA,Olympics,FIFA World Cup)and domestic ones(e.g.,CBA,China Table Tennis Super League,Hangzhou Asian Games)demonstrate practical implementations and comparative effects.The analysis highlights challenges,including terminology-real-time conflicts,accent and noise interference,cultural and emotional nuance loss,latency-cost-stability issues,and data privacy-copyright concerns.To mitigate these,technical improvements are proposed,focusing on multimodal fusion,sports-domain pre-trained models,and latency optimization through edge computing.The study underscores the theoretical and practical significance for sports media,emphasizing AI's role in enhancing audience experience and promoting Chinese sports culture globally.Future trends point toward more intelligent,personalized,and ecosystem-integrated applications. 展开更多
关键词 Artificial Intelligence Sports Broadcasting Machine Translation
High Robust Broadcasting over DTMB-A with Low-rate LDPC Codes 认领 引用 被引量：2
3
作者 Chao Zhang Kewu Peng +2 位作者 Zhitong He Yonglin Xue Hui Yang 《China Communications》 SCIE CSCD 2022年第3期192-201,共10页
As the 2nd generation digital terrestrial television broadcasting(DTTB)standard,digital terrestrialelevision multimedia broadcasting-advanced(DTMB-A)can provide higher spectrum efficiency and transmission reliability ... As the 2nd generation digital terrestrial television broadcasting(DTTB)standard,digital terrestrialelevision multimedia broadcasting-advanced(DTMB-A)can provide higher spectrum efficiency and transmission reliability by adopting flexible frame structure and advanced forward error correction coding compared with the 1 st generation DTTB systems.In order to increase the flexibility and robustness of the DTTB network,the frequency reuse scheme of factor one(reuse-1)is proposed,where the same RF channel is used by different stations covering the adjacent service areas.However,it demands a very low carrier-tonoise ratio(C/N)threshold below 0 dB at the DTTB physical layer.In this paper,a robust broadcasting technique is proposed based on DTMB-A with newly designed low-rate low density parity check(LDPC)codes.By adopting quasi-cyclic(QC)Raptor-like structure and progressive lifting method,the high performance low-rate LDPC codes are designed supporting multiple code lengths.Both density-evolution analyses and laboratory measurements demonstrate that DTMB-A with low-rate coding can complete the demodulation reliably with the C/N threshold below0 d B,which is one important necessary condition to support frequency reuse-1 scheme. 展开更多
关键词 digital terrestrialelevision multimedia broadcasting-advanced(DTMB-A) digital terrestrial television broadcasting(DTTB) low-rate low density parity check(LDPC)code
暂未订购 下载PDF
Impact of small-world topologies on broadcasting for wireless sensor networks 认领 引用 被引量：2
4
作者 Jiang Nan Yang Shuqun +1 位作者 Zhou Liang Ding Qiulin 《Journal of Systems Engineering and Electronics》 SCIE EI 2009年第1期192-196,共5页
Broadcasting is an important operation and been widely used in wireless sensor networks （WSNs）. These networks are power constrained as nodes operate with limited battery power. Wireless sensor networks are spatial ... Broadcasting is an important operation and been widely used in wireless sensor networks （WSNs）. These networks are power constrained as nodes operate with limited battery power. Wireless sensor networks are spatial graphs that have much more clustered and much high path-length characteristics. After considering energy- efficient broadcasting in such networks, by combining the small-world characteristic of WSNs and the properties of ant algorithm to quickly identify an optimal path, small-world power-aware broadcast algorithm is introduced and evaluated. Given different densities of network, simulation results show that our algorithm significantly improves life of networks and also reduces communication distances and power consumption. 展开更多
关键词 small world ant colony algorithm broadcasting wireless sensor networks.
暂未订购 下载PDF
Partially secret broadcasting,partially secret splitting with quantum entanglement 认领 引用 被引量：4
5
作者 刘玉 张彬彬 《Chinese Physics B》 SCIE EI CAS 2010年第1期90-94,共5页
In this paper, we propose a classical secret broadcasting and splitting joint protocol in a quantum scenario. With those genuinely entangled states, the boss can always broadcast some of his secrets and split some oth... In this paper, we propose a classical secret broadcasting and splitting joint protocol in a quantum scenario. With those genuinely entangled states, the boss can always broadcast some of his secrets and split some others to multi- receivers at the same time. The efficiency of the joint protocol is also compared with that of two separate ones which realise classical secret broadcasting and classical secret splitting respectively, and based on the comparison we can see the promising advantage of our joint protocol is that it can realise the two tasks more efficiently and more conveniently. 展开更多
关键词 secret broadcasting secret splitting quantum entanglement
暂未订购 下载PDF
Wireless location algorithm using digital broadcasting signals based on neural network 认领 引用 被引量：1
6
作者 柯炜 吴乐南 殷奎喜 《Journal of Southeast University(English Edition)》 EI CAS 2010年第3期394-398,共5页
In order to enhance the accuracy and reliability of wireless location under non-line-of-sight （NLOS） environments,a novel neural network （NN） location approach using the digital broadcasting signals is presented. ... In order to enhance the accuracy and reliability of wireless location under non-line-of-sight （NLOS） environments,a novel neural network （NN） location approach using the digital broadcasting signals is presented. By the learning ability of the NN and the closely approximate unknown function to any degree of desired accuracy,the input-output mapping relationship between coordinates and the measurement data of time of arrival （TOA） and time difference of arrival （TDOA） is established. A real-time learning algorithm based on the extended Kalman filter （EKF） is used to train the multilayer perceptron （MLP） network by treating the linkweights of a network as the states of the nonlinear dynamic system. Since the EKF-based learning algorithm approximately gives the minimum variance estimate of the linkweights,the convergence is improved in comparison with the backwards error propagation （BP） algorithm. Numerical results illustrate thatthe proposedalgorithmcanachieve enhanced accuracy,and the performance ofthe algorithmis betterthanthat of the BP-based NN algorithm and the least squares （LS） algorithm in the NLOS environments. Moreover,this location method does not depend on a particular distribution of the NLOS error and does not need line-of-sight （ LOS ） or NLOS identification. 展开更多
关键词 digital broadcasting signals neural network extended Kalman filter （EKF） backwards error propagation algorithm multilayer perceptron
暂未订购 下载PDF
Cooperative DVB-SH Satellite Broadcasting Systems with Rotated Signal Constellations 认领 引用
7
作者 Nikos C.Sagias Stylianos Papaharalabos P.Takis Mathiopoulos 《China Communications》 SCIE CSCD 2015年第6期59-72,共14页
In this paper,we study the advantages of cooperation in broadcasting systems from a geosynchronous earth orbit(GEO)satellite to mobile terminals(MTs),achieved through a terrestrial complementary ground station(CGS) wi... In this paper,we study the advantages of cooperation in broadcasting systems from a geosynchronous earth orbit(GEO)satellite to mobile terminals(MTs),achieved through a terrestrial complementary ground station(CGS) with fixed installment,which acts as a relay.Moreover and in the context of the digital video broadcasting-satellite-to-handheld(DVB-SH) standard,the performance improvements offered by the rotated constellations method are investigated,where prior transmission,a phase rotation of the transmitted symbols by a fixed angle is applied followed by a random component interleaver.Turbo codes with soft decision decoding and appropriate random channel interleavers are also considered.We present analytical expressions for the bit log-likelihood ratios(LLRs)that are needed for soft decision decoding at the MT turbo decoder,while the code combining technique is adapted to improve the end-to-end(E2E) performance.Then,we obtain through extensive computer simulations the average bit error probability(ABEP) of quadrature phase-shift keying(QPSK) signals received over pure land-mobile satellite(LMS)and pure CGS links for coding rates 1/3 and6/7.Moreover,the optimal rotation angles are obtained for both links.E2 E ABEP results are then presented assuming cooperation between GEO and CGS,while the power allocation issue is investigated under fixed total transmission power.Our performance evaluation results show that by using the constellation rotation technique,a performance gain can be achieved for high coding rates. 展开更多
关键词 broadcasting code combining constellation rotation coding rate comple-mentary ground system （CGS） coopera-tion digital video broadcasting satellite-to-hand-held （DVB-SH） decode-and-forward log-likelihood ratio （LLR） quadrature phase-shift keying （QPSK） orthogonal frequency-di-vision multiplexing （OFDM） relays satellitecommunications soft-decision decoding tur-bo codes random interleavers
暂未订购 下载PDF
Advanced Digital Techniques and Tendencies in the Development of Modem Digital Satellite Broadcasting 认领 引用
8
作者 董荔真 《Journal of Beijing Institute of Technology》 EI CAS 1994年第2期170-175,共6页
The fundamental aspects of digital broadcasting are its service flexibility and power savings, which make all-digital satellite broadcasting a viable and economic propositon compared with analog broadcasting. Tendenci... The fundamental aspects of digital broadcasting are its service flexibility and power savings, which make all-digital satellite broadcasting a viable and economic propositon compared with analog broadcasting. Tendencies in the development of digital television broadcasting are: (1) Stereophonic or two-language sound transmission with television in existing analog TV system, (2) Digital direct satellite broadcasting (D-DBS); (3)Digital high definition television (HDTV) Broadcasting. 展开更多
关键词 satellite broadcasting television high-resolution TV stereophonic technique/ digital Satellite broadcasting
暂未订购 下载PDF
Scheduling for constantly-evolving data broadcasting in asymmetric communication networks 认领 引用
9
作者 许华杰 李国徽 《Journal of Shanghai University(English Edition)》 2008年第6期508-514,共7页
Recent advances in wireless sensor networks and GPS have made constantly-evolving data a new type of data which bring a new challenge to traditional data processing methods. Data broadcasting is an effective means for... Recent advances in wireless sensor networks and GPS have made constantly-evolving data a new type of data which bring a new challenge to traditional data processing methods. Data broadcasting is an effective means for data dissemination in asymmetric communication networks, such as wireless networks. In this paper, definition of the mean uncertainty ratio of data is presented and a broadcasting scheme is proposed for constantly-evolving data dissemination. Simulation results show that the scheme can reduce the uncertainty of the broadcasted constantly-evolving data effectively at the cost of minor increase in data access time, in the case of no transmission error, transmission errors present, and multiple broadcast channels. As a result it benefits the qualities of the query results based on the data. 展开更多
关键词 symmetric communication networks constantly-evolving data broadcasting scheduling
暂未订购 下载PDF
The Response Time Analysis of Digital Broadcasting System 认领 引用
10
作者 WANGShuo ZHANGJiang-ling FENGDan 《Wuhan University Journal of Natural Sciences》 EI CAS 2005年第3期515-519,共5页
Digital broadcasting system has become a high-light of research on computer application. To respond to the changes of the playbill in the broadcasting system in real time, the response time of the system must be studi... Digital broadcasting system has become a high-light of research on computer application. To respond to the changes of the playbill in the broadcasting system in real time, the response time of the system must be studied. There is scarcely the research on this area currently. The influence factors in the response time are analyzed; the model on the response time of the system service is built; how the influence factors affect the response time of the system service is validated; and four improvement measures are proposed to minimize the response time of system service. 展开更多
关键词 Key words digital broadcasting system response time analysis real time
暂未订购 下载PDF
Public Broadcasting in Brazil" Challenges to Overcome a Symbolic Liability 认领 引用
11
作者 Carlos Eduardo Esc h, Nel1ia R. Del Bianco 《Journalism and Mass Communication》 2013年第11期691-704,共14页
A survey of opinion conducted by the Observatory of Public Broadcasting in Latin America indicates that one of the biggest challenges for Brazilian public broadcasting lies in changing the perception that has been cry... A survey of opinion conducted by the Observatory of Public Broadcasting in Latin America indicates that one of the biggest challenges for Brazilian public broadcasting lies in changing the perception that has been crystallized by the public in relation to such stations. Initial analysis of the data obtained so far shows that the respondents have a negative image in relation to public media. At times, the people manifest themselves in favor of the principles that should delimit the performance of radios and TVs, such as diversity, independence, and differentiation from commercial media, but, which are not fully followed. At other times, they criticize the quality of programming and the political-governmental character of these stations. In this critical scenario, the paper presents a discussion on the challenges facing the sector considering the complex historical, cultural, and economic policy circumstances, that have contributed to the maintenance of this ＂symbolic liability＂ between media and the audience/citizens, and which reflects on the possible strategies to face the problem. 展开更多
关键词 public broadcasting observatory of public broadcasting audience and symbolic liability
暂未订购 下载PDF
A smartcard conditional access interface scheme for conditional access subsystem separation in digital TV broadcasting 认领 引用 被引量：2
12
作者 XIE Qiang ZHENG Shi-bao YU Xiao-jing 《Journal of Zhejiang University-SCIENCE A》 EI CAS 2006年第6期1008-1017,共10页
Conditional access system (CAS) is a key technical component in digital TV broadcasting through which TV op-erators manage the appropriate rights of different subscribers in order to protect their commercial benefits.... Conditional access system (CAS) is a key technical component in digital TV broadcasting through which TV op-erators manage the appropriate rights of different subscribers in order to protect their commercial benefits. The normal digital TV receiver can only receive and decode the pay TV programs scrambled by one specific CAS. In this paper, the authors proposed a smartcard conditional access interface (SCAI) scheme in order to make the digital TV receiver be a common receiving platform independent of any specific CAS employed at the broadcasting head-end. As a result, it only needs to include a common condi-tional access software package (CCAP) without any requirement of hardware modification in the receiver. Comparison between the two mentioned DVB-CI-based schemes showed that the cost of such kind receiver is greatly reduced. The main design points of the proposed scheme and its reference implementation’s architecture are presented in this paper. This scheme is also one of the candidate national standards for Chinese digital TV broadcasting industry. 展开更多
关键词 Digital TV broadcasting Conditional access subsystem separation Smartcard interface
暂未订购 下载PDF
DIFFERENTIAL AMPLITUDE PHASE SHIFT KEYING: A NEW MODULATION METHOD FOR TURBO CODE IN DIGITAL RADIO BROADCASTING 认领 引用 被引量：2
13
作者 Khalid H. Sayhood Wu Lenan 《Journal of Electronics(China)》 2003年第2期86-96,共11页
The multilevel modulation techniques nf M-Differential Amplitude Phase Shift Keying (DAPSK) have been proposed in combination with Turbo code scheme for digital radio broadcasting bands below 30 MHz radio channel. Com... The multilevel modulation techniques nf M-Differential Amplitude Phase Shift Keying (DAPSK) have been proposed in combination with Turbo code scheme for digital radio broadcasting bands below 30 MHz radio channel. Comparison of this modulation method with channel coding in an Additive White Gaussian Noise (AWGN) and multi-path fading channels has been presented. The analysis provides an iterative decoding of the Turbo code. 展开更多
关键词 DAPSK system Turbo code Digital radio broadcasting
暂未订购 下载PDF
Design Method for Optimizing the Interactive Interface of Live Broadcasting Platform for the Elderly Users 认领 引用 被引量：1
14
作者 WEI Bi-ze FAN Wei DUAN Ying-ke 《印刷与数字媒体技术研究》 CAS 北大核心 2024年第4期167-178,共12页
In the era of network live broadcasting for everyone,the development of live broadcasting platforms is also more intelligent and diversified.However,in the face of a large group of elderly users,the interface interact... In the era of network live broadcasting for everyone,the development of live broadcasting platforms is also more intelligent and diversified.However,in the face of a large group of elderly users,the interface interaction design mode used is still mainly based on the interaction mode for young groups,and is not designed for elderly users.Therefore,a design method for optimizing the interaction interface of live broadcasting platform for elderly users was proposed in this study.Firstly,the case study method and Delphi expert survey method were used to determine the design needs of elderly users and the design mode was analysed.Secondly,the orthogonal design principle was used to design a test sample of the interactive interface of live broadcasting platform applicable for the elderly users,and then a user evaluation system was established to calculate the weights of the design elements using hierarchical analysis,and then the predictive relationship between the design mode of the interactive interface of live broadcasting platform and the elderly users was established by Quantitative Theory I.Finally,Genetic Algorithm was applied to generate the optimized design scheme.The results showed that the design method based on the Genetic Algorithm and the combination of Quantitative Theory can scientifically and effectively optimize the design of the interactive interface of the live broadcasting platform for the elderly users,and improve the experience of the elderly users. 展开更多
关键词 Live broadcasting platform Interaction design Elderly users Genetic Algorithm Quantitative Theory I
暂未订购 下载PDF
Live Video Services Using Fast Broadcasting Scheme 认领 引用 被引量：1
15
作者 Satish Chand 《Communications and Network》 2010年第1期79-85,共7页
The Fast Broadcasting scheme is one of the simplest schemes that provide video services. In this scheme, the video is divided into equal-sized segments depending upon the bandwidth allocated by the video server. If th... The Fast Broadcasting scheme is one of the simplest schemes that provide video services. In this scheme, the video is divided into equal-sized segments depending upon the bandwidth allocated by the video server. If the video length is not known, then this scheme cannot be applied as the number of video segments cannot be determined. In a live video wherein the video size is unknown, especially the ending time of the live broadcast, e.g., cricket match, this scheme cannot be applied. In this paper, we propose a model that helps the Fast Broadcasting scheme to support live video broadcasting. The basic architecture of the system consists of a live system with one video channel that broadcasts the live video and a video server that broadcasts the already broadcast live video to users. 展开更多
关键词 fast broadcasting scheme live video channel channel transition
暂未订购 下载PDF
Islamic Work Values and Organizational Commitment: A Case Study Among Employees in Broadcasting Industry 认领 引用 被引量：1
16
作者 Othman Mohd. Yunus Munira Mazlan +1 位作者 Abdul Rahman Abdul Rahim Alwi Bin Shabudin 《China-USA Business Review》 2012年第2期161-172,共12页
This study examines the contribution of Islamic work values towards organization commitment among employees. A total of 90 Muslim employees from a local broadcasting organization participated in this study. This descr... This study examines the contribution of Islamic work values towards organization commitment among employees. A total of 90 Muslim employees from a local broadcasting organization participated in this study. This descriptive study uses self-administered questionnaire to gauge the respondents＇ level of Islamic work value and organizational commitment. Findings of the study demonstrated that there were no significant differences in the level of Islamic work ethic between males and females, and between the management group and the support group. The findings also showed a moderate but significant relationship between Islamic work value and dimensions within organizational commitment. 展开更多
关键词 Islamic work value organizational commitment broadcasting industry muslim employees productivity
暂未订购 下载PDF
The Adaptive Long-Distance HF Broadcasting System Based on Backscatter Technique 认领 引用
17
作者 Guan Rongsheng Jin Qi Xie Shuguo 《Wuhan University Journal of Natural Sciences》 EI CAS 1998年第2期165-168,共4页
We put forth a project, that is: using the backscatter technique to realize adaptive long-distance HF broadcasting system in order to improve the quality of HF broadcasting. Then, we analyze errors of the system due t... We put forth a project, that is: using the backscatter technique to realize adaptive long-distance HF broadcasting system in order to improve the quality of HF broadcasting. Then, we analyze errors of the system due to the deviation of the ionospheric parameters' prediction. From the analysis, we draw the conclusion that our project is feasible. In addition, we point out that we can use frequency-spreading and information-coding technique to acquire more clear ionograms. We also offer a judgment on how to choose the control propagation mode on condition of multihop and the existence of more than one propagation mode on the signals' path. 展开更多
关键词 HF broadcasting channel backscatter technique frequency-spreading coding
暂未订购 下载PDF
Environmental impact of electromagnetic radiation from the 10kWmedium wave transmitter of Weihai Broadcasting Station 认领 引用
18
作者 Wen Congjiang Lu Deming +1 位作者 Wang Shuquan,Wang Baosheng Hu Baoge 《Journal of Environmental Sciences》 SCIE EI CAS 1995年第4期461-467,共7页
Environmentalimpactofelectromagneticradiationfromthe10kWmediumwavetransmitterofWeihaiBroadcastingStationWenCongjiang；LuDeming...
关键词 environmental impact assessment electromagnetic radiation broadcasting station electromagneticpollution.
暂未订购 下载PDF
Storing and Searching Metadata for Digital Broadcasting on Set-Top Box Environments 认领 引用
19
作者 Jong-Hyun Park Ji-Hoon Kang 《Journal of Software Engineering and Applications》 2008年第1期26-32,共7页
Digital broadcasting is a novel paradigm for the next generation broadcasting. Its goal is to provide not only better quality of pictures but also a variety of services that is impossible in traditional airwaves broad... Digital broadcasting is a novel paradigm for the next generation broadcasting. Its goal is to provide not only better quality of pictures but also a variety of services that is impossible in traditional airwaves broadcasting. One of the important factors for this new broadcasting environment is the interoperability among broadcasting applications since the environment is distributed. Therefore the broadcasting metadata becomes increasingly important and one of the metadata standards for a digital broadcasting is TV-Anytime metadata. TV-Anytime metadata is defined using XML schema, so its instances are XML data. In order to fulfill interoperability, a standard query language is also required and XQuery is a natural choice. There are some researches for dealing with broadcasting metadata. In our previous study, we have proposed the method for efficiently managing the broadcasting metadata in a service provider. However, the environment of a Set-Top Box for digital broadcasting is limited such as low-cost and low-setting. Therefore there are some considerations to apply general approaches for managing the metadata into the Set-Top Box. This paper proposes a method for efficiently managing the broadcasting metadata based on the Set-Top Box and a prototype of metadata management system for evaluating our method. Our system consists of a storage engine to store the metadata and an XQuery engine to search the stored metadata and uses special index for storing and searching. Our two engines are designed independently with hardware platform therefore these engines can be used in any low-cost applications to manage broadcasting metadata. 展开更多
关键词 Digital Broadcasting Metadata Management Storing and Searching XML Data XQuery Processing TV-Anytime metadata Set-Top Box
暂未订购 下载PDF
Forwarding vs. Network Coding: Efficient Broadcasting in Multihop Wireless Networks 认领 引用
20
作者 Suranjit Paul Thomas Kunz Li Li 《International Journal of Communications, Network and System Sciences》 2011年第4期205-218,共14页
Broadcasting is used as a building block in many MANET (Mobile Ad hoc Network) routing protocols. In addition, broadcasting is a key primitive in ad hoc networks to support group-based applications. Efficiently suppor... Broadcasting is used as a building block in many MANET (Mobile Ad hoc Network) routing protocols. In addition, broadcasting is a key primitive in ad hoc networks to support group-based applications. Efficiently supporting broadcasting in multihop wireless networks is therefore important. In this paper, we compare ef-ficient broadcasting protocols based on packet forwarding with those based on network coding. Using a number of network scenarios, we derive lower bounds for the required number of packet retransmissions at the MAC layer to support broadcast with and without applying network coding techniques. We compare these lower bounds with each other, as well as with protocols proposed for each approach. More specifically, we use SMF and PDP as sample forwarding-based broadcast protocols, and a simple XOR-based coding protocol over SMF and PDP as representative network coding solution. The results show that neither packet forwarding protocols nor network coding protocols achieve the theoretical lower bounds, in particular as the size of the network area (at constant density) increases. The comparison of the lower bounds also shows that network coding does have a potential performance advantage over packet forwarding solutions for broad-casting in multi-hop wireless networks, in particular for larger fixed density networks, justifying its inherent increased complexity. 展开更多
关键词 MANETs Broadcasting Multi-hop Networks SMF PDP Network Coding
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 19 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈