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A time synchronization mechanism based on Software Defined Radio of general-purpose processor 一种基于通用处理器软件无线电的时间同步机制
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417588
Hongguang Duan, Dengshan Huang, Yi Huang, Yiqing Zhou, Jinglin Shi
{"title":"A time synchronization mechanism based on Software Defined Radio of general-purpose processor","authors":"Hongguang Duan, Dengshan Huang, Yi Huang, Yiqing Zhou, Jinglin Shi","doi":"10.1109/ChinaCom.2012.6417588","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417588","url":null,"abstract":"In recent years, Software Defined Radio (SDR) has become one of the major research concerns in mobile communications for the advantages of flexibility and versatility. Most of the air-interface processes such as signal processing and data multiplexing are done on a programmable software environment. The latest SDR platforms utilize the power of general-purpose processor (GPP) to perform all of the real-time computations and several wideband communication systems are prototyped. Nevertheless, the lack of universal real-time timing control and synchronization process make implemented GPP-based SDR platforms difficult to simulate time crucial multi-user cellular communication scenarios. Focus on the problem of time synchronization on SDR platforms, this paper presents a software-based time synchronization mechanism, which is called software time synchronization (STS). On that basis, a real-time and high precision clock source is designed on GPP-based SDR platforms and the multi-user communication system is synchronized utilizing round-trip delay (RTD) algorithm. Long-term experiments showed that a SDR prototype using STS is able to simulate TDMA-based cellular communications. The results also indicate that the STS synchronization errors are within several microseconds.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"44 10","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120983490","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: 6
Coverage analysis and validation of a novel sharing indoor distributional antenna 一种新型共享室内分布天线的覆盖分析与验证
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417574
Jianquan Wang, Xiao-Lin Huang, Weicheng Yan, Jun Yang, Xinzhong Li, Qiang Fu
{"title":"Coverage analysis and validation of a novel sharing indoor distributional antenna","authors":"Jianquan Wang, Xiao-Lin Huang, Weicheng Yan, Jun Yang, Xinzhong Li, Qiang Fu","doi":"10.1109/ChinaCom.2012.6417574","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417574","url":null,"abstract":"The conventional antenna cover low efficiency, poor network quality, the field strength of the cover between the indoor distribution system in the different systems of different mutual interference and indoor distribution system redundant construction serious waste of resources. To solve above mentioned problems, China Unicom raised a novel sharing indoor distributional antenna. This article mainly analyzes and validates the coverage of the novel sharing indoor distributional antenna from the theoretical design and the network testing.","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":"130321256","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
A MAC protocol based on dynamic time adjusting in wireless MIMO networks 无线MIMO网络中基于动态时间调节的MAC协议
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417540
Yang Qin, Xiaoxiong Zhong, Li Li, Zhenhua Su, Xuebing Li
{"title":"A MAC protocol based on dynamic time adjusting in wireless MIMO networks","authors":"Yang Qin, Xiaoxiong Zhong, Li Li, Zhenhua Su, Xuebing Li","doi":"10.1109/ChinaCom.2012.6417540","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417540","url":null,"abstract":"Multi-Input Multi-Output (MIMO) technology can improve the throughput of wireless networks, and many Media Access Control (MAC) protocols have been proposed to support simultaneous transmissions. But there also exist some limitations or drawbacks in those MAC protocols. They can not utilize the communication resources efficiently, such as MIMA-MAC, PRP-MAC, etc. In this paper, we propose a MAC protocol based on dynamically adjusting the waiting time of CTS packets in MIMO ad hoc networks called DACW-MAC. It can allocate the antenna resources optimally by dynamically adjusting the priority of CTS. The shorter the waiting time of CTS is, the higher the priority of CTS is. We analyze the performance of DACW-MAC and evaluate it through extensive simulations. The simulation results show that DACW-MAC can enhance the throughput of wireless networks compared with PRP-MAC.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"67 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":"131656346","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
Joint synchronization and channel estimation for the uplink coordinated multi-point systems 上行协调多点系统的联合同步与信道估计
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417512
Lian Chang, Jian-hua Zhang, Xiaofan Li, Baoling Liu, Kai Sun
{"title":"Joint synchronization and channel estimation for the uplink coordinated multi-point systems","authors":"Lian Chang, Jian-hua Zhang, Xiaofan Li, Baoling Liu, Kai Sun","doi":"10.1109/ChinaCom.2012.6417512","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417512","url":null,"abstract":"This paper addresses the reference sequence (RS)-aided joint synchronization and channel estimation for the uplink of coordinated multi-point (CoMP) systems based on the minimum mean square error (MMSE) criterion. Considering the highly complex grid-search process involved in the MMSE estimation, the alternating minimization method is employed to simplify the MMSE cost function such that the multiuser carrier frequency offset (CFO), sampling timing offset (STO), and channel frequency response (CFR) can be estimated in an iterative approach which is more feasible for practical systems. Moreover, with the delicately designed orthogonal RS, multiuser RS interference can be effectively suppressed. Finally, the performance of the joint estimator is analytically investigated from the perspectives of estimation error and Cramer-Rao bound (CRB). Simulation results indicate that the proposed scheme can achieve almost ideal performance for both synchronization and channel estimation.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"17 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":"134224701","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
A routing protocol with integrated routing metric for multi-channel wireless sensor networks 多通道无线传感器网络中集成路由度量的路由协议
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417528
Yang Yang, Xutao Yu, Min Tan
{"title":"A routing protocol with integrated routing metric for multi-channel wireless sensor networks","authors":"Yang Yang, Xutao Yu, Min Tan","doi":"10.1109/ChinaCom.2012.6417528","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417528","url":null,"abstract":"In this paper we propose a routing protocol with integrated routing metric for multi-channel wireless sensor networks. We improve the existing multi-channel AODV protocol to adapt to multi-channel wireless sensor networks. We consider link cost and the delivery cost of remaining energy in route selection. The simulation results show that, we can increase the network lifetime using the integrated routing metric.","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":"130845889","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
Performance analysis of cooperative mode selection in hybrid D2D and IMT-Advanced network D2D和IMT-Advanced混合网络合作模式选择性能分析
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417577
Shangwen Xiang, Q. Quan, Tao Peng, Wenbo Wang
{"title":"Performance analysis of cooperative mode selection in hybrid D2D and IMT-Advanced network","authors":"Shangwen Xiang, Q. Quan, Tao Peng, Wenbo Wang","doi":"10.1109/ChinaCom.2012.6417577","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417577","url":null,"abstract":"While Device-to-Device communication enables high-speed local services in the traditional cellular networks, it also brings potential mutual interference additionally. Previous works neither make decisions cooperatively nor take involute situations resulted from the incoming technical instruments in IMT-Advanced network into account. In this paper, based on the learning from a single cell of the hybrid D2D and IMT-Advanced network, a cooperative mode selection mechanism with both power allocation and resource sharing optimization is proposed, aiming at selecting the optimal mode with the overall system capacity maximized and QoS of cellular user satisfied. The analysis of its performance is present particularly and the outcomes of the simulation exhibit our cooperative mechanism operates remarkably better than the non-cooperative one and D2D communication certainly enhances the pure cellular network.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"8 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":"133721494","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: 16
A high-resolution weak signal detection method based on stochastic resonance and superhet technology 基于随机共振和超高温技术的高分辨率微弱信号检测方法
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417501
Shuo Shi, Wanyi Yin, Mingchuan Yang, M. He
{"title":"A high-resolution weak signal detection method based on stochastic resonance and superhet technology","authors":"Shuo Shi, Wanyi Yin, Mingchuan Yang, M. He","doi":"10.1109/ChinaCom.2012.6417501","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417501","url":null,"abstract":"A detection method based on the strong low-frequency weak-signal detection ability of stochastic resonance is proposed, aimed at the detection of the unknown weak signal. By mixing the unknown signal with a continuous linear changing local oscillator signal, a difference frequency signal will be generated, which will be sent to the stochastic resonance system. Thus, an obviously changed output can be obtained. Because the stochastic resonance system is extremely sensitive to low frequency, the system will have a maximum output when the local oscillator and frequency of the unknown signal are closest. The frequency of the unknown signal will be measured precisely from the local oscillator frequency and the difference frequency. It can be inferred from the theoretical analysis and numerical simulation that this method has a large detection range, high resolution, and good prospect.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"2 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":"133285664","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: 3
Load balancing algorithm based virtual machine dynamic migration scheme for datacenter application with optical networks 基于负载均衡算法的光网络数据中心虚拟机动态迁移方案
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417489
Xinyu Zhang, Yongli Zhao, Xin Su, Ruiying He, Weiwei Wang, Jie Zhang
{"title":"Load balancing algorithm based virtual machine dynamic migration scheme for datacenter application with optical networks","authors":"Xinyu Zhang, Yongli Zhao, Xin Su, Ruiying He, Weiwei Wang, Jie Zhang","doi":"10.1109/ChinaCom.2012.6417489","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417489","url":null,"abstract":"This paper proposes a load balancing algorithm based virtual machine dynamic migration scheme for datacenter application with optical networks. The combination of the virtual machine dynamic migration scheme and the load balancing algorithm can help the virtual machines' migration with a dynamic adjustment on the basis of the current data center's situation in real-time. And in this way, it can reach the minimum average load among data center's occupation of service resource. Besides, the experiment results show that the time of migration process is very short, and users' service level agreement (SLA) can be met well.","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":"130183458","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
A method for DNS names identical resolution 一个用于DNS名称相同解析的方法
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417443
Jiankang Yao, Wei Mao
{"title":"A method for DNS names identical resolution","authors":"Jiankang Yao, Wei Mao","doi":"10.1109/ChinaCom.2012.6417443","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417443","url":null,"abstract":"Internet users hope that some of names in the DNS name space can get the same DNS resolution results. With the development of internationalized domain name (IDN) protocols, more and more IDNs including Chinese domain names are added into the DNS name space and many of them are expected to be identical in the DNS resolution. How to make the DNS name resolution equivalence becomes more critical. Current solutions including CNAME and DNAME can not solve this problem. This paper proposes a MNAME solution for DNS names identical resolution.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"16 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":"132295623","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
Design and realization of an autonomous software-defined radio 自主软件无线电的设计与实现
7th International Conference on Communications and Networking in China Pub Date : 2012-08-01 DOI: 10.1109/ChinaCom.2012.6417548
Shilian Wang, Ziwei Zhou
{"title":"Design and realization of an autonomous software-defined radio","authors":"Shilian Wang, Ziwei Zhou","doi":"10.1109/ChinaCom.2012.6417548","DOIUrl":"https://doi.org/10.1109/ChinaCom.2012.6417548","url":null,"abstract":"We introduce the design and implementation of an autonomous software-defined radio (A-SDR). A suboptimal parameter estimation architecture with low complexity is designed, including estimation of the symbol period and shaping factor, modulation-type classification, and carrier frequency estimation. The estimated results are delivered to a universal multi-mode demodulator, in which the clock of analog-to-digital conversion (ADC) is configured by both the estimated symbol period and the symbol timing jitter, the PLL with universal phase discriminating algorithm can lock onto the residual carrier signal for most types of modulation. Some experimental results are given, it is shown that our A-SDR can demodulate most MPSK and MQAM signals with seamlessly changed bit rates without any prior knowledge.","PeriodicalId":143739,"journal":{"name":"7th International Conference on Communications and Networking in China","volume":"56 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":"133972995","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
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