2015 22nd International Conference on Telecommunications (ICT)最新文献_第6页

Accurate node localization with directional pulsed infrared light for indoor ad hoc network applications 基于定向脉冲红外光的室内自组织网络节点精确定位

2015 22nd International Conference on Telecommunications (ICT) Pub Date : 2015-04-27 DOI: 10.1109/ICT.2015.7124716

Y. Sekercioglu, J. Violi, L. Priestnall, J. Armstrong

{"title":"Accurate node localization with directional pulsed infrared light for indoor ad hoc network applications","authors":"Y. Sekercioglu, J. Violi, L. Priestnall, J. Armstrong","doi":"10.1109/ICT.2015.7124716","DOIUrl":"https://doi.org/10.1109/ICT.2015.7124716","url":null,"abstract":"We present a localization scheme for indoor ad hoc networks which use pulsed infrared light as the communication medium. Ad hoc networks are formed when devices with wireless communications capabilities spontaneously connect and exchange information packets. Typically, in wireless ad hoc networks, nodes estimate their position relative to their neighbors by processing the location information in conjunction with the certain physical properties of the signals they receive, such as signal strength, bit error rate, or time difference of arrival. Unfortunately, widely used low-cost infrared transmitters and receivers for indoor applications do not allow measurement of these properties easily. To overcome this, we have developed a system which relies only on the reception of a data frame and is capable of estimating the angular direction of the infrared signal source within an error margin of +/- 5 degrees. Then, through the application of triangulation, a node estimates its relative position with respect to its neighbors. One effective method of translating a relative position to an absolute one is to use anchor nodes. These nodes broadcast their exact location. Each receiving node then progressively fixes its position and broadcasts the position updates, leading to the entire network localizing itself. A major drawback of this approach arises in large networks, where the average hop distance between an anchor and ordinary nodes is large, and position estimation errors inevitably start to accumulate. In order to alleviate this problem, we have developed the Anchor Hop Distance Weighted Localization (AHDWL) algorithm to selectively weigh position estimates at each hop. We found that the AHDWL algorithm is very effective in reducing propagation of positioning errors.","PeriodicalId":375669,"journal":{"name":"2015 22nd International Conference on Telecommunications (ICT)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122515948","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: 5

Joint reconstruction algorithms for one-bit distributed compressed sensing 一比特分布式压缩感知的联合重构算法

2015 22nd International Conference on Telecommunications (ICT) Pub Date : 2015-04-27 DOI: 10.1109/ICT.2015.7124707

Yun Tian, Wenbo Xu, Cong Zhang, Yue Wang, Hongwen Yang

引用次数: 7

Energy-aware joint transmission Coordinated MultiPoint utilizing dynamic sectorization 能源感知联合传输利用动态分区的协调多点

2015 22nd International Conference on Telecommunications (ICT) Pub Date : 2015-04-27 DOI: 10.1109/ICT.2015.7124705

Robert Webster, K. Munasinghe, A. Jamalipour

{"title":"Energy-aware joint transmission Coordinated MultiPoint utilizing dynamic sectorization","authors":"Robert Webster, K. Munasinghe, A. Jamalipour","doi":"10.1109/ICT.2015.7124705","DOIUrl":"https://doi.org/10.1109/ICT.2015.7124705","url":null,"abstract":"This paper presents the results for a combined Coordinated MultiPoint (CoMP) and Dynamic Sectorization (DS) approach for energy saving at the Base Station (BS) in LTE-A cellular networks. The DS scheme is based on ecological self-organization where BSs are dynamically reconfigured based on their tempo-spatial traffic diversity. The compatibility of CoMP and DS is explored and improved upon independent DS energy savings by 10%. Sector switching patterns are examined and their relationship between energy savings defined. Furthermore, the bit rate of boundary User Equipment (UE) is explored. Previously when utilizing DS without CoMP, boundary UEs that required high bit rates would limit the effectiveness of the DS scheme due to the large number of Resource Blocks (RB) required for their transmission. However, by utilizing CoMP joint transmission, an underserved boundary UE can attain sustained bit rates by sharing transmission responsibilities between neighboring BSs. This effectively allows RB allocation to be exchanged from a loaded BS to a neighboring unloaded BS. When the exchange is based on minimizing the initial BS's load factor, the DS sector switching can be invoked. This allows for decreased energy consumption but increased or sustained boundary UE bit rate.","PeriodicalId":375669,"journal":{"name":"2015 22nd International Conference on Telecommunications (ICT)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126392799","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

Adaptive contention window tuning for IEEE 802.11 IEEE 802.11的自适应争用窗口调优

2015 22nd International Conference on Telecommunications (ICT) Pub Date : 2015-04-27 DOI: 10.1109/ICT.2015.7124660

Xin Zhou, C. Zheng, Xiao-Xin He

引用次数: 8

Diversity of low-density lattices 低密度格的多样性

2015 22nd International Conference on Telecommunications (ICT) Pub Date : 2015-04-27 DOI: 10.1109/ICT.2015.7124696

Mayur Punekar, J. Boutros

引用次数: 1

Evolutionary radio resource management in distributed femtocell networks 分布式飞蜂窝网络中的演化无线电资源管理

2015 22nd International Conference on Telecommunications (ICT) Pub Date : 2015-04-27 DOI: 10.1109/ICT.2015.7124677

Shangjing Lin, Wei Ni, Hui Tian, R. Liu

引用次数: 2

Energy-optimal resource scheduling and computation offloading in small cell networks 小蜂窝网络中能量最优资源调度与计算卸载

2015 22nd International Conference on Telecommunications (ICT) Pub Date : 2015-04-27 DOI: 10.1109/ICT.2015.7124703

Wael Labidi, M. Sarkiss, M. Kamoun

引用次数: 66

A wavelet compression based channel feedback protocol for spatially correlated massive MIMO systems 基于小波压缩的空间相关海量MIMO系统信道反馈协议

2015 22nd International Conference on Telecommunications (ICT) Pub Date : 2015-04-27 DOI: 10.1109/ICT.2015.7124701

Pengbiao Wang, Junfeng Wang, Cheng-lin Zhao, Xiaokai Liu

{"title":"A wavelet compression based channel feedback protocol for spatially correlated massive MIMO systems","authors":"Pengbiao Wang, Junfeng Wang, Cheng-lin Zhao, Xiaokai Liu","doi":"10.1109/ICT.2015.7124701","DOIUrl":"https://doi.org/10.1109/ICT.2015.7124701","url":null,"abstract":"Equipped with large scale antenna arrays, massive multiple input multiple output systems are qualified with several benefits including enhanced throughput, power efficiency, and anti-interference ability, etc. The acquisition of such advantages requires adequate channel state information at transmitter. In frequency division duplex multiple input multiple output systems, channel state information is extracted through channel feedback mechanism which is not easy to implement due to the fact that the feedback overhead is critical with so many antennas. However, large scale antenna arrays may introduce correlation elements into channel state information due to the limit of the base station size. Therefore, we propose a wavelet compression based channel feedback protocol aiming to reduce the feedback load by exploiting the correlation features among large scale antenna arrays. We take a point-to-point massive multiple input multiple output system into consideration, and both Jakes correlation model and exponential correlation model are applied to make the numerical simulations and verify the performance of the proposed wavelet compression based feedback scheme.","PeriodicalId":375669,"journal":{"name":"2015 22nd International Conference on Telecommunications (ICT)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126864512","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: 5

Artificial neural network-based nonlinear channel equalization: A soft-output perspective 基于人工神经网络的非线性信道均衡:软输出视角

2015 22nd International Conference on Telecommunications (ICT) Pub Date : 2015-04-27 DOI: 10.1109/ICT.2015.7124690

Xuantao Lyu, W. Feng, Rui Shi, Yukui Pei, N. Ge

{"title":"Artificial neural network-based nonlinear channel equalization: A soft-output perspective","authors":"Xuantao Lyu, W. Feng, Rui Shi, Yukui Pei, N. Ge","doi":"10.1109/ICT.2015.7124690","DOIUrl":"https://doi.org/10.1109/ICT.2015.7124690","url":null,"abstract":"The artificial neural network (ANN) has been shown that, is an effect technique used to gain insight into channel equalizer design, to combat nonlinear distortion in wireless communication systems. Also, the joint design of channel equalizer and decoder can provides great advantages for system performance. However, research on the soft output of an ANN-based equalizer still remains largely open. Towards this end, this paper proposes an accurate soft information characterization for an ANN-based channel equalizer, which is crucial for the joint development of equalization and decoding. Particularly, we focus on the functional link ANN (FLANN)-based channel equalizer. By adopting the Kolmogorov-Smirnov test, we find that the error signal of a FLANN-based equalizer is not Gauss, which would pose a challenge to the calculation of the soft information. We use the mix-Gauss distribution to model the error signal, and accordingly the log-likelihood ratio (LLR) from a FLANN-based equalizer is derived. We also give insight into the mix-Gauss model that one component stands for the channel noise and another component stands for the noise caused by the equalizer, which may shed some lights on the optimization of a FLANN-based equalizer.","PeriodicalId":375669,"journal":{"name":"2015 22nd International Conference on Telecommunications (ICT)","volume":"49 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114003990","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: 13

Performance evaluation of PUMA routing protocol for Manhattan mobility model on vehicular ad-hoc network 基于车辆自组织网络曼哈顿移动模型的PUMA路由协议性能评价

2015 22nd International Conference on Telecommunications (ICT) Pub Date : 2015-04-27 DOI: 10.1109/ICT.2015.7124661

D. Perdana, Muhammad Nanda, Revient Ode, R. F. Sari

{"title":"Performance evaluation of PUMA routing protocol for Manhattan mobility model on vehicular ad-hoc network","authors":"D. Perdana, Muhammad Nanda, Revient Ode, R. F. Sari","doi":"10.1109/ICT.2015.7124661","DOIUrl":"https://doi.org/10.1109/ICT.2015.7124661","url":null,"abstract":"The Quality of Service (QoS) on the traffic environment with high mobility, dynamic topology, and change trajectory is one of the challenges in the use of Vehicular Ad-Hoc Networks (VANET) Routing Protocols. PUMA routing protocol presents multicast work mechanism based on shared mesh topology. It always dynamically adapt to VANET traffic conditions. In this paper, we evaluated the PUMA routing protocol performance using the Manhattan Mobility Model with the effect of the Nakagami fading distribution in VANET. We also analyse the average node distribution in the tagged vehicle communication range using Poisson distribution. We use the NS 2.34 and VanetMobiSim for the simulation and evaluation of the performance. The performance results will be analyzed by varying the traffic parameters in the Manhattan mobility model from low to high traffic condition. The simulation result shows that the communication range under the Nakagami fading distribution affected the Quality of Service (QoS) in VANET. We found that the delay is higher compared with those in the condition without Nakagami fading. The throughput is also lower compared with those in the condition without Nakagami fading.","PeriodicalId":375669,"journal":{"name":"2015 22nd International Conference on Telecommunications (ICT)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130010904","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: 13