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2014 IEEE Asia Pacific Conference on Wireless and Mobile最新文献

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Transmission performance of OFDM with 1024-QAM in the presence of EVM degradation EVM退化情况下1024-QAM OFDM的传输性能
2014 IEEE Asia Pacific Conference on Wireless and Mobile Pub Date : 2014-10-13 DOI: 10.1109/APWIMOB.2014.6920262
Mitsuhito Iwamoto, Shingo Matsuoka, H. Iwasaki, H. Otsuka
{"title":"Transmission performance of OFDM with 1024-QAM in the presence of EVM degradation","authors":"Mitsuhito Iwamoto, Shingo Matsuoka, H. Iwasaki, H. Otsuka","doi":"10.1109/APWIMOB.2014.6920262","DOIUrl":"https://doi.org/10.1109/APWIMOB.2014.6920262","url":null,"abstract":"This paper presents error vector magnitude (EVM) impact on the transmission performance of OFDM using a higher order modulation scheme such as 256- and 1024-QAM by link-level simulations. BER performance is highlighted as parameters of coding rates for 256- and 1024-QAM in the presence of EVM degradation. Using these results, we clarify the relation of spectral efficiency and channel quality, such as Eb/No, to meet a BER of 10-2 for 64-, 256- and 1024-QAM from the link adaptation perspective. This will be useful for deciding an allowable EVM for each QAM and provide an effective way to help resource management in future mobile systems such as small cells.","PeriodicalId":177383,"journal":{"name":"2014 IEEE Asia Pacific Conference on Wireless and Mobile","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125488250","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: 12
Improved DV-Hop algorithm through anchor position re-estimation 基于锚点位置重估计的改进DV-Hop算法
2014 IEEE Asia Pacific Conference on Wireless and Mobile Pub Date : 2014-10-13 DOI: 10.1109/APWIMOB.2014.6920272
Samiru Gayan, D. Dias
{"title":"Improved DV-Hop algorithm through anchor position re-estimation","authors":"Samiru Gayan, D. Dias","doi":"10.1109/APWIMOB.2014.6920272","DOIUrl":"https://doi.org/10.1109/APWIMOB.2014.6920272","url":null,"abstract":"The DV-Hop algorithm is an attractive option for the localization of nodes in a wireless sensor network due to its simplicity. However it suffers from poor accuracy. This paper presents a novel algorithm to enhance the accuracy of this algorithm. The idea is to use the DV-Hop algorithm to estimate positions of the anchors which are already known. The estimation errors so obtained are then minimized through an optimization algorithm which finds the optimum correction to the hop size. The locations of the unknown nodes are then estimated with the modified hop size using least squares estimation. We examine the performance of the algorithm for varying node numbers, anchor ratios and radio range. The results show that the proposed algorithm has better performances in localization precision and stability than the original DV-Hop algorithm.","PeriodicalId":177383,"journal":{"name":"2014 IEEE Asia Pacific Conference on Wireless and Mobile","volume":"2008 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125953261","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: 19
High efficient impedance matching circuit of power amplifier combined with antenna 大功率放大器与天线相结合的高效阻抗匹配电路
2014 IEEE Asia Pacific Conference on Wireless and Mobile Pub Date : 2014-10-10 DOI: 10.1109/APWIMOB.2014.6920283
S. Nakamura, R. Pokharel, K. Yoshida, H. Kanaya, D. Kanemoto
{"title":"High efficient impedance matching circuit of power amplifier combined with antenna","authors":"S. Nakamura, R. Pokharel, K. Yoshida, H. Kanaya, D. Kanemoto","doi":"10.1109/APWIMOB.2014.6920283","DOIUrl":"https://doi.org/10.1109/APWIMOB.2014.6920283","url":null,"abstract":"This paper describes the design of the power amplifier (PA) for 5GHz WLAN transmitter. In order to realize the high power added efficiency (PAE), impedance matching circuit is calculated by using the load-pull method. In this case, output impedance of the PA is different from 50 ohm. Our proposed 5 GHz class-A PA matched to the impedance of maximum PAE is designed. This PA has 9.82 dB of gain and 20.2 % of PAE which is 1.8 point larger than that of 50 ohm impedance matched PA. This PA is fabricated on the 0.18 um CMOS technology and measured the RF properties.","PeriodicalId":177383,"journal":{"name":"2014 IEEE Asia Pacific Conference on Wireless and Mobile","volume":"330 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115875312","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
Neighbour list optimization for real LTE radio networks 真实LTE无线网络的邻居列表优化
2014 IEEE Asia Pacific Conference on Wireless and Mobile Pub Date : 2014-10-01 DOI: 10.1109/APWIMOB.2014.6920278
D. Duarte, P. Vieira, A. Rodrigues, A. Martins, N. Oliveira, L. Varela
{"title":"Neighbour list optimization for real LTE radio networks","authors":"D. Duarte, P. Vieira, A. Rodrigues, A. Martins, N. Oliveira, L. Varela","doi":"10.1109/APWIMOB.2014.6920278","DOIUrl":"https://doi.org/10.1109/APWIMOB.2014.6920278","url":null,"abstract":"With the increasing complexity of current networks, it became evident the need for Self-Organizing Networks (SON), which aims to automate most of the associated radio planning and optimization tasks. Within SON, this paper aims to optimize the Neighbour Cell List (NCL) for Long Term Evolution (LTE) evolved NodeBs (eNBs). An algorithm composed by three decisions were were developed: distance-based, Radio Frequency (RF) measurement-based and Handover (HO) stats-based. The distance-based decision, proposes a new NCL taking account the eNB location and interference tiers, based in the quadrants method. The last two algorithms consider signal strength measurements and HO statistics, respectively; they also define a ranking to each eNB and neighbour relation addition/removal based on user defined constraints. The algorithms were developed and implemented over an already existent radio network optimization professional tool. Several case studies were produced using real data from a Portuguese LTE mobile operator.","PeriodicalId":177383,"journal":{"name":"2014 IEEE Asia Pacific Conference on Wireless and Mobile","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122615031","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
A survey of rural Wireless Mesh Network (WMN) deployments 农村无线网状网络(WMN)部署调查
2014 IEEE Asia Pacific Conference on Wireless and Mobile Pub Date : 2014-08-28 DOI: 10.1109/APWIMOB.2014.6920271
A. Ajayi, U. Roedig, C. Edwards, N. Race
{"title":"A survey of rural Wireless Mesh Network (WMN) deployments","authors":"A. Ajayi, U. Roedig, C. Edwards, N. Race","doi":"10.1109/APWIMOB.2014.6920271","DOIUrl":"https://doi.org/10.1109/APWIMOB.2014.6920271","url":null,"abstract":"Wireless Mesh Networks (WMNs) has remained an alternative to providing telecommunication services in many rural parts of industrialized and developing countries. However, the suitability of existing rural mesh technologies in industrialized countries and how it fits emerging remote areas in developing countries is in doubt. While the architectures are similar; subtle technical differences impact mesh performances of rural deployments in developing countries. In this paper, the research focus describes generic rural settings via the taxonomy of the domains' characteristic. The authors present a survey of a few IEEE 802.11-based rural WMNs deployments in real-life scenarios over a decade between 2003 and 2013. In particular, the study offers an evaluation and critical analysis of a few design components of these deployments. Finally, it identifies a plethora of common patterns, technical variations, challenges and unique features as well as some future directions to improve the reliability and resilience of WMN deployments in rural Africa.","PeriodicalId":177383,"journal":{"name":"2014 IEEE Asia Pacific Conference on Wireless and Mobile","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129511502","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: 12
An adaptive overtaking maneuver assistant system using VANET 基于VANET的自适应超车机动辅助系统
2014 IEEE Asia Pacific Conference on Wireless and Mobile Pub Date : 2014-08-01 DOI: 10.1109/APWIMOB.2014.6920314
Ali Marefat, Rozita Aboki, A. Jalooli, Erfan Shaghaghi, M. Jabbarpour, Rafidah Md Noor
{"title":"An adaptive overtaking maneuver assistant system using VANET","authors":"Ali Marefat, Rozita Aboki, A. Jalooli, Erfan Shaghaghi, M. Jabbarpour, Rafidah Md Noor","doi":"10.1109/APWIMOB.2014.6920314","DOIUrl":"https://doi.org/10.1109/APWIMOB.2014.6920314","url":null,"abstract":"One of the most risky maneuvers in suburban roads containing one lane for each direction is overtaking another vehicle which caused a large number of accidents and fatalities. Although, the single overtaking task counts as hazardous action, it becomes more challenging while involving in hybrid scenarios with comprising various factors. This paper presents an intelligent driver assistant system in scenarios performing overtaking maneuver of a long vision obstructing vehicle as a frontrunner with a probability of another vehicle in front with obstacle likelihood on the road. The principal of this system is to reduce the risk of overtaking maneuver in a hybrid scenario cases by using wireless technology based on Vehicular Ad hoc Network (VANET) to optimize driver's behavior in high risk situations with guidance for making proper decision in case of performing safe overtaking action.","PeriodicalId":177383,"journal":{"name":"2014 IEEE Asia Pacific Conference on Wireless and Mobile","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125306117","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: 10
A regulatory framework for implementation of machine to machine services 用于实现机器对机器服务的监管框架
2014 IEEE Asia Pacific Conference on Wireless and Mobile Pub Date : 2014-08-01 DOI: 10.1109/APWIMOB.2014.6920285
Anggi Fitri, Farda Hasun, H. K. Widhiputranto
{"title":"A regulatory framework for implementation of machine to machine services","authors":"Anggi Fitri, Farda Hasun, H. K. Widhiputranto","doi":"10.1109/APWIMOB.2014.6920285","DOIUrl":"https://doi.org/10.1109/APWIMOB.2014.6920285","url":null,"abstract":"The aim of this paper is to propose a regulatory framework recommendation for M2M services to the Indonesian telecommunications regulatory authority. The recommendation is formulated by considering the goals of regulation, the stage of growth and the business model of M2M services. The data required for the formulation are collected from literature study, in-depth interviews and Focus Group Discussions. In-depth interviews and Focus Group Discussions (FGD) involve participants from regulator, vendors, M2M service providers, and academicians. The analysis of this paper is started with identifying the issues and challenges that may occur in deploying M2M services in Indonesian telecommunications market, and then identifying the relevant actions to minimize or solve them. More attention will be given to recommendation for the emergent stage, according to the current status of the deployment of M2M services in Indonesia.","PeriodicalId":177383,"journal":{"name":"2014 IEEE Asia Pacific Conference on Wireless and Mobile","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127566544","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
Non cooperative Cournot economic game model for heterogeneous coexistence in TVWS TVWS异构共存的非合作古诺经济博弈模型
2014 IEEE Asia Pacific Conference on Wireless and Mobile Pub Date : 2014-08-01 DOI: 10.1109/APWIMOB.2014.6920282
A. Kelechi, R. Nordin
{"title":"Non cooperative Cournot economic game model for heterogeneous coexistence in TVWS","authors":"A. Kelechi, R. Nordin","doi":"10.1109/APWIMOB.2014.6920282","DOIUrl":"https://doi.org/10.1109/APWIMOB.2014.6920282","url":null,"abstract":"In this paper, we formulated heterogeneous coexistence strategy in TVWS (TV White Space) between Primary Users (PUs), Cognitive Secondary Networks (CSNs) and TVWS coexistence standards using Cournot economic game model. Cournot economic game model is based on quantity and it is appropriate because, there are fewer TV transmitters in rural areas and hence, lots of TVWS spectrum channels per footprint. The robustness of the proposed model is that, it takes into account the unique SINR requirements of both PU and CSNs. While simultaneously, maintaining the key functionalities of heterogeneous coexistence framework. Contrary to the norm that, as PU continues to sell their licensed spectrum, revenue is maximized. Rather, it was discovered by way of simulations, such assumption never hold. However, Cournot point is simulated in which PU can maximize both revenue and QoS. In spectrum auction, an arbitrator is required to act as a spectrum broker, we propose the use of existing TVWS standards for this purpose. Thus, enabling coexistence between PUs and TVWS networks.","PeriodicalId":177383,"journal":{"name":"2014 IEEE Asia Pacific Conference on Wireless and Mobile","volume":"264 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132613510","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 database access scheme for Elastic-Core Architecture 一种基于弹性核心架构的数据库访问方案
2014 IEEE Asia Pacific Conference on Wireless and Mobile Pub Date : 2014-08-01 DOI: 10.1109/APWIMOB.2014.6920275
Takeo Yamasaki, Ashiq Khan, M. Tamura, T. Shimizu, Shigeru Iwashina
{"title":"A database access scheme for Elastic-Core Architecture","authors":"Takeo Yamasaki, Ashiq Khan, M. Tamura, T. Shimizu, Shigeru Iwashina","doi":"10.1109/APWIMOB.2014.6920275","DOIUrl":"https://doi.org/10.1109/APWIMOB.2014.6920275","url":null,"abstract":"We propose a database access extension to the Elastic-Core Architecture, a mobile core network virtualization architecture. The proposed improvements, i.e., using a combination of a caching scheme and a peer-to-peer type backend database with a specific read/write mode, reduce the state sharing load, enable more effective network site operation, and further enhance availability. We implement the architecture in virtualized IP Multimedia Subsystem (IMS) servers and compare the proposed caching scheme against the conventional memory synchronization approach. Results show a 12.5% reduction in the CPU usage overhead and network usage is drastically reduced as well. Finally, we prove that the improved Elastic-Core Architecture prevents call loss, achieving 100% service availability for a 20 ms transmission delay among IMS nodes and their state database.","PeriodicalId":177383,"journal":{"name":"2014 IEEE Asia Pacific Conference on Wireless and Mobile","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123025618","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
Path loss prediction model for a sloped area in microcell based on scale model and real environment measurements 基于比例尺模型和实际环境测量的微蜂窝倾斜区域路径损耗预测模型
2014 IEEE Asia Pacific Conference on Wireless and Mobile Pub Date : 2014-08-01 DOI: 10.1109/APWIMOB.2014.6920281
Takanori Seo, Hideaki Yukue, Takuya Kuribayashi, T. Tsutsumi, S. Ichitsubo, M. Hata, S. Tomisato
{"title":"Path loss prediction model for a sloped area in microcell based on scale model and real environment measurements","authors":"Takanori Seo, Hideaki Yukue, Takuya Kuribayashi, T. Tsutsumi, S. Ichitsubo, M. Hata, S. Tomisato","doi":"10.1109/APWIMOB.2014.6920281","DOIUrl":"https://doi.org/10.1109/APWIMOB.2014.6920281","url":null,"abstract":"We propose a model for predicting the path loss of a sloped area in a microcell service area of a mobile communication system. This is the prediction model to be proposed that targets a microcell. For practical use, a model requires parameters such as the base station height, angle of the sloped area, and distance from the base station to the sloped area. The proposed model uses a correction method based on the characteristics of the base station height to predict the path loss of the sloped area based on the path loss of flat terrain. The proposed model is verified based on measurements of a scale model and real environments. A 1/70 scale model is constructed of a residential area and the path losses are measured at 10.5 GHz. In real environments, the path losses are measured at 902 MHz. The measurement results show that the path losses predicted using the proposed model are close to the measured results.","PeriodicalId":177383,"journal":{"name":"2014 IEEE Asia Pacific Conference on Wireless and Mobile","volume":"97 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120852911","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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