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7th International Conference on Communications and Networking in China最新文献

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Pre-configured polyhedron (p-poly) based protection structure against multi-link failures in optical networks 基于预配置多面体(p-poly)的光网络多链路故障保护结构
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417490
Shanguo Huang, Jie Zhang, Xin Li, Yongli Zhao, W. Gu
{"title":"Pre-configured polyhedron (p-poly) based protection structure against multi-link failures in optical networks","authors":"Shanguo Huang, Jie Zhang, Xin Li, Yongli Zhao, W. Gu","doi":"10.1109/ChinaCom.2012.6417490","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417490","url":null,"abstract":"In this paper, we propose a novel protection scheme based on pre-configured polyhedron (p-poly) structure against multi-link failures in high capacity and large scale optical transport networks. P-poly structure has higher capacity efficiency than the existing p-cycle protection structure even though we can design p-cycle based networks for multi-link failures scenario. We provide a theoretical underpinning for the application of p-poly structure in providing protection against multi-link failures. Two greedy algorithms and two ant colony optimization algorithms are respectively proposed for constructing p-poly structure in static and dynamic networks. Numerical results show that the logic redundancy of p-poly based networks is slightly higher than the lower bound on logic redundancy of link-restorable networks but much lower than that of p-cycles based protection structure under dual-link and three-link failures.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121634607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Analysis of RF requirements for Active Antenna System 有源天线系统射频需求分析
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417569
Rong Zhou, W. Zhang
{"title":"Analysis of RF requirements for Active Antenna System","authors":"Rong Zhou, W. Zhang","doi":"10.1109/ChinaCom.2012.6417569","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417569","url":null,"abstract":"Active Antenna System (AAS) is a Base Station equipped with an antenna array system, the radiation pattern of which may be dynamically adjustable. Since the interactions between the transmitters and receivers within the AAS might be different from the convention BS and the convention antenna system, the impacts of the transmitted or received radio signals on the transmitter and receivers shall be studied. In this article, we present an overview on some typical new characteristics of the AAS, such as spatial ACLR, in-band blocking. Then quantitative study of in-band blocking is conducted according system level simulations.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"91 S8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132511695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
New bounds on the sum-of-squares indicator 平方和指示器的新界限
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417470
Yu Zhou, Xinfeng Dong, Wenzheng Zhang, Bing Zeng
{"title":"New bounds on the sum-of-squares indicator","authors":"Yu Zhou, Xinfeng Dong, Wenzheng Zhang, Bing Zeng","doi":"10.1109/ChinaCom.2012.6417470","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417470","url":null,"abstract":"The two indicators the sum-of-squares indicator and the absoluate indicator between two different Boolean functions f and g are introduced by Yu Zhou, Min Xie, Guozhen Xiao, On the global avalanche characteristics of two Boolean functions and the higher order nonlinearity. Information Sciences. 180(2010) 256-265, to measure of cryptographic behavior in a global manner. In this paper, we derive a new bound on the sum-of-squares indicator. Moreover, we obtain some bounds on the sum-of-squares indicator of a Boolean function f by using two decomposition functions f1, f2. Finally, we give a method to construct balanced Boolean functions with n(n >;= 6) variables by the disjoint spectra functions, where n is an even integer, satisfying strict avalanche criterion, high nonlinearity and lower GAC.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130285402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Detection algorithms for physical network coding 物理网络编码检测算法
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417449
Chengkang Pan, Jianjun Liu, Zhenping Hu
{"title":"Detection algorithms for physical network coding","authors":"Chengkang Pan, Jianjun Liu, Zhenping Hu","doi":"10.1109/ChinaCom.2012.6417449","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417449","url":null,"abstract":"This paper investigates multi-user detection (MUD) as well as virtual single-user detection (VSUD) for denoising-based physical network coding in two-way relay channels. In MUD, the two source messages are detected separately and then mapped into a relaying message. In VSUD, the relaying message is obtained directly by detecting the received signal. Maximum likelihood (ML) algorithm and linear algorithms are considered for both single-antenna case and multi-antenna case with and without transmit power and phase control. Suboptimal detection algorithms with lower complexity are also proposed for VSUD. Simulation results show that ML VSUD can achieve better BER performance than ML MUD. The proposed detection algorithms can achieve similar BER performance to ML VSUD .","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127224436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
NS-2 based wireless vehicular network performance study with high speed urban mobile relays 基于NS-2的高速城市移动中继无线车联网性能研究
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417552
Donghoon Kang, Wei Wang, Byung Eon Park, Lin Xing, Sung Y. Shin
{"title":"NS-2 based wireless vehicular network performance study with high speed urban mobile relays","authors":"Donghoon Kang, Wei Wang, Byung Eon Park, Lin Xing, Sung Y. Shin","doi":"10.1109/ChinaCom.2012.6417552","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417552","url":null,"abstract":"Wireless networks using mobile relays are widely used by urban vehicles, where throughputs and transmission delays are critically performance metrics. Even though there are several wireless routing protocols, the proper data forwarding algorithm should be carefully selected based on their characteristic in various situations. This paper provides extensive NS-2 based performance evaluation of three essential wireless data forwarding algorithms used in popular Mobile Ad Hoc Networks (MANET): Ad hoc on Demand Distance Vector (AODV), Destination-Sequenced Distance Vector (DSDV), and Dynamic Source Routing (DSR). We investigate throughputs, packet drop rate, and transmission delay with various numbers of mobile nodes and realistic mobility models, and provide a useful reference guideline to determine the best wireless data forwarding protocol for vehicles in urban areas. According to our performance study, AODV is the most effective algorithm in terms of throughput and data transmission delay for mobile environments.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115834648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Remote control of base station antenna systems based on two-dimensional electrically adjustable technology 基于二维电可调技术的基站天线系统远程控制
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417568
Xiwang Dai, Zhenye Wang, Chengzhu Zhang, Hui Chen
{"title":"Remote control of base station antenna systems based on two-dimensional electrically adjustable technology","authors":"Xiwang Dai, Zhenye Wang, Chengzhu Zhang, Hui Chen","doi":"10.1109/ChinaCom.2012.6417568","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417568","url":null,"abstract":"The adjustments of vertical angle and horizontal azimuth angle of base station antenna are the most frequent and most enormous workload in the operation and maintenance of base station. Based on two-dimensional electrically adjustable technology, RCU with AISG2.0 protocol can remote control vertical beam and horizontal coverage area of the entire base station network. With the automated optimization software, the rational allocation of each base station antenna can be done smartly. Compared with the traditional base station systems, this one has the advantages such as smart remote to adjust, the two-dimensional electrical adjustment, and work around the clock.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123581144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Improved joint network-channel coding for the multiple-access relay channel 多址中继信道的改进联合网络信道编码
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417578
Wei Fang, Chunjing Hu, Zhuo Sun, S. Hou
{"title":"Improved joint network-channel coding for the multiple-access relay channel","authors":"Wei Fang, Chunjing Hu, Zhuo Sun, S. Hou","doi":"10.1109/ChinaCom.2012.6417578","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417578","url":null,"abstract":"This paper proposes a novel joint network- channel coding (JNCC) system based on improved distributed turbo coded (DTC) scheme for multiple-access relay channel, using decode-and-forward protocol. The diversity of improved DTC scheme is that the two parity streams of the two RSC encoders of UE are converted into one stream by puncturing. In addition, we adopt the punctured parity streams of Convolutional Turbo Code (CTC) at the relay and BS, which takes advantage of the feature of two inputs for the decoded information bits from two mobile stations. Here, CTC acts as a network coding as well as channel coding between relay and BS. The performance of this communication system depends on the twice decoding at the BS according to the side information and CTC punctured parity information. The simulation results show that performance of proposed scheme overperforms the reference network-coding scheme which separates channel decoding from network coding, and has 0.8dB improvement at a bit error rate (BER) of 10-3 in AWGN channel than the reference scheme.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128448665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Decentralized cognitive MAC protocol design based on POMDP and Q-Learning
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417543
Zhongli Lan, Hong Jiang, Xiaoli Wu
{"title":"Decentralized cognitive MAC protocol design based on POMDP and Q-Learning","authors":"Zhongli Lan, Hong Jiang, Xiaoli Wu","doi":"10.1109/ChinaCom.2012.6417543","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417543","url":null,"abstract":"A decentralized cognitive MAC protocol is proposed in this paper, whose core depends on the partially observed Markov process (POMDP) and Q-Learning. Limited by the hardware and environment, a secondary user may not be able to have ability to sense the entire spectrum space. Therefore, the POMDP is exploited to model the secondary network. In this paper, Q-Learning is applied to solve the POMDP because it can make full advantage of the past observation and decision experiences to optimize current action, and needs not transfer the POMDP into a belief MDP. The numeral simulation results show that Q-Learning-based decentralized cognitive MAC protocol improves the overall performance of the networks.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130102721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Analysis of handover performance improvement in cloud-RAN architecture 云- ran架构中切换性能改进分析
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417603
Liang Liu, Feng Yang, Richard Wang, Zhenning Shi, Alan Stidwell, Daqing Gu
{"title":"Analysis of handover performance improvement in cloud-RAN architecture","authors":"Liang Liu, Feng Yang, Richard Wang, Zhenning Shi, Alan Stidwell, Daqing Gu","doi":"10.1109/ChinaCom.2012.6417603","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417603","url":null,"abstract":"With the surge of mobile internet traffic, Cloud RAN (C-RAN) becomes an innovative architecture to help mobile operators maintain profitability and financial growth as well as to provide better services to the customers. It consists of Base Band Units (BBU) of several base stations, which are co-located in a secured place called Central Office and connected to Radio Remote Heads (RRH) via high bandwidth, low latency links. With BBU centralization in C-RAN, handover, the most important feature for mobile communications, could achieve simplified procedure or improved performance. In this paper, we analyze the handover performance of C-RAN over a baseline decentralized RAN (D-RAN) for GSM, UMTS and LTE systems. The results indicate that, lower total average handover interrupt time could be achieved in GSM thanks to the synchronous nature of handovers in C-RAN. For UMTS, inter-NodeB soft handover in D-RAN would become intra-pool softer handover in C-RAN. This brings some gains in terms of reduced signalling, less Iub transport bearer setup and reduced transport bandwidth requirement. For LTE X2-based inter-eNB handover, C-RAN could reduce the handover delay and to a large extent eliminate the risk of UE losing its connection with the serving cell while still waiting for the handover command, which in turn decrease the handover failure rate.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130779772","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 28
Experimental demonstration of content sharing on service-oriented optical internet 面向服务的光互联网上内容共享的实验演示
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417488
Hui Li, Lipeng Wang, Yuefeng Ji
{"title":"Experimental demonstration of content sharing on service-oriented optical internet","authors":"Hui Li, Lipeng Wang, Yuefeng Ji","doi":"10.1109/ChinaCom.2012.6417488","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417488","url":null,"abstract":"Increasing data centers need deep cooperation with optical backbone. In this paper, we choose video content distribution as the application to drive optical network directly. A service-oriented optical internet prototype network is built up, which can establish a dynamic wavelength path for video content block downloading. The experimental demonstration of the novel control scheme is presented in this work. Results show that optical network can serve application layer with quickly dynamic connections.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129252293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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