2017 23rd Asia-Pacific Conference on Communications (APCC)最新文献_第7页

UAV-enabled multiuser wireless power transfer: Trajectory design and energy optimization 支持无人机的多用户无线电力传输:轨迹设计和能量优化

2017 23rd Asia-Pacific Conference on Communications (APCC) Pub Date : 2017-12-01 DOI: 10.23919/APCC.2017.8304077

Jie Xu, Yong Zeng, Rui Zhang

{"title":"UAV-enabled multiuser wireless power transfer: Trajectory design and energy optimization","authors":"Jie Xu, Yong Zeng, Rui Zhang","doi":"10.23919/APCC.2017.8304077","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304077","url":null,"abstract":"This paper investigates an unmanned aerial vehicle (UAV)-enabled multiuser wireless power transfer (WPT) system, where a UAV-mounted energy transmitter (ET) is dispatched to broadcast wireless energy to charge multiple energy receivers (ERs) on the ground. To ensure efficient and fair WPT, we maximize the minimum of the energy harvested by all ERs during a given charging period, by optimizing the UAV's trajectory subject to its maximum speed constraints. Such a min-energy maximization problem, however, is non-convex, and thus is challenging to be directly solved. To tackle this problem, we first consider an ideal case by ignoring the UAV's maximum speed constraint, and show that the relaxed problem can be optimally solved via the Lagrange dual method. The obtained trajectory solution implies that the UAV should hover over a set of fixed locations with optimal allocation of the hovering time among them. Then, for the general case with the UAV's maximum speed constraint considered, we propose a new successive hover-and-fly trajectory motivated by the optimal trajectory in the ideal case, and obtain efficient trajectory designs by applying the successive convex programing (SCP) optimization technique. Numerical results show that our proposed trajectory designs significantly improve the min-energy transferred to all ERs, as compared to other benchmark schemes.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"267 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122147150","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: 43

An assistive healthcare platform for both social and service networking for engaging elderly people 为老年人提供社会和服务网络的辅助医疗保健平台

2017 23rd Asia-Pacific Conference on Communications (APCC) Pub Date : 2017-12-01 DOI: 10.23919/APCC.2017.8304017

T. V. Ha, D. Hoang

{"title":"An assistive healthcare platform for both social and service networking for engaging elderly people","authors":"T. V. Ha, D. Hoang","doi":"10.23919/APCC.2017.8304017","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304017","url":null,"abstract":"Most countries around the globe are facing the same issue — an aging population. As an individual move from their working life to a retirement life, multiple socio-economic issues can occur as their social life has also significantly changed. This shift often affects an individual's mental health and well-being. As a result, the aging population requires a solution that does reduce not only its impact on the government but also harvests its contribution to the society. Existing solutions are based on utilizing online platforms such as social network or service network as a medium to reduce social isolation and improve the mental health of elderly people. However, these solutions fail on two accounts: 1) they fail to see older people as active contributors and 2) older people do not see the needs or benefits of using them. This paper proposes a solution that addresses those two issues by engaging people actively and collaboratively as contributors of services and/or receivers of social benefits through an assistive platform that integrates a service network with a social network. This model combines the advantages of both platforms, offers many opportunities for seniors to not only utilize their skills and knowledge to exchange benefits with other users but also expand their social life. The proposed model can be used as a mean to engage older adults to the community, making them become more active, improve their mental well-being and subsequently reduce the cost of health services to the society.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124792130","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

Low complexity user pairing algorithm for in-band full-duplex networks with power control 带内全双工带功率控制网络的低复杂度用户配对算法

2017 23rd Asia-Pacific Conference on Communications (APCC) Pub Date : 2017-12-01 DOI: 10.23919/APCC.2017.8304055

Sanghwa Lee, Minho Yang, Tae Woo Kim, Dong Ku Kim

引用次数: 1

Distributed cache management considering content popularity for in-network caching 分布式缓存管理，考虑网络内缓存的内容流行程度

2017 23rd Asia-Pacific Conference on Communications (APCC) Pub Date : 2017-12-01 DOI: 10.23919/APCC.2017.8304046

M. Iio, K. Hirata, M. Yamamoto

引用次数: 2

Multiple access partial computational offloading: Two-user case 多访问部分计算卸载:双用户情况

2017 23rd Asia-Pacific Conference on Communications (APCC) Pub Date : 2017-12-01 DOI: 10.23919/APCC.2017.8304092

Mahsa Salmani, T. Davidson

{"title":"Multiple access partial computational offloading: Two-user case","authors":"Mahsa Salmani, T. Davidson","doi":"10.23919/APCC.2017.8304092","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304092","url":null,"abstract":"The opportunity to offload computational tasks to computing resources embedded in the network infrastructure enables mobile users to expand the scope of the applications that can be processed and to reduce the energy required to complete them. In this paper we seek insight into the impact of the choice of the multiple access scheme that is employed when each of two users has a divisible task that they wish to complete with partial assistance from a computing resource at the access point. In particular, we obtain quasi-closed-form solutions for the partitioning of the problem, the transmission powers and the transmission rates that minimize the sum of the transmission energy and the local computation energy for each user, subject to latency, transmission power and achievable rate constraints. We consider both the case in which the multiple access scheme is unrestricted, and the case of time division multiple access. Our numerical results demonstrate that exploiting the full capabilities of the multiple access channel enables a substantial reduction in the energy expended by the users, especially when the users have significantly different channel gains.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128852545","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

Received power threshold and reply timing controlled reactive routing scheme for reliable ad hoc network 基于接收功率门限和应答时间控制的可靠自组网响应路由方案

2017 23rd Asia-Pacific Conference on Communications (APCC) Pub Date : 2017-12-01 DOI: 10.23919/APCC.2017.8303980

M. Hayashi, Y. Yamao

引用次数: 3

Spatial-wideband effect in massive MIMO systems 大规模MIMO系统中的空间宽带效应

2017 23rd Asia-Pacific Conference on Communications (APCC) Pub Date : 2017-12-01 DOI: 10.23919/APCC.2017.8304091

Bolei Wang, F. Gao, Shi Jin, Hai-Hsing Lin, Geoffrey Y. Li

{"title":"Spatial-wideband effect in massive MIMO systems","authors":"Bolei Wang, F. Gao, Shi Jin, Hai-Hsing Lin, Geoffrey Y. Li","doi":"10.23919/APCC.2017.8304091","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304091","url":null,"abstract":"For massive multiple-input multiple-output (MIMO) systems, the furthest distance between two antennas may be very large compared with the carrier wavelength. Therefore, the physical propagation delay of electromagnetic wave across the array aperture cannot be ignored, which will cause spatial-wideband effect and make the system design much different from the conventional one that only considers the frequency-wideband effect. Taking mmWave-band communications as an example, we demonstrate the spatial- and frequency-wideband effects, called the dual-wideband effects, in massive MIMO systems. We first discuss a new dual-wideband channel model. By exploiting the channel sparsity in the angle and the delay domains, we then develop a simple yet effective channel estimation algorithm. Thanks to the angular-delay reciprocity, the proposed channel estimation strategy is suitable for both TDD and FDD communication systems. The subsequent numerical results clarify that the proposed transmission design can well address the dual-wideband effects and significantly outperform the existing designs that only consider the frequency-wideband effect.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126271270","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: 8

Performance evaluations on adaptive PAPR reduction method using null space in MIMO channel for eigenmode massive MIMO-OFDM signals 特征模海量MIMO- ofdm信号MIMO信道零空间自适应PAPR降低方法的性能评价

2017 23rd Asia-Pacific Conference on Communications (APCC) Pub Date : 2017-12-01 DOI: 10.23919/APCC.2017.8304036

Y. Matsumoto, K. Tateishi, K. Higuchi

{"title":"Performance evaluations on adaptive PAPR reduction method using null space in MIMO channel for eigenmode massive MIMO-OFDM signals","authors":"Y. Matsumoto, K. Tateishi, K. Higuchi","doi":"10.23919/APCC.2017.8304036","DOIUrl":"https://doi.org/10.23919/APCC.2017.8304036","url":null,"abstract":"The combination of massive multiple-input multiple-output (MIMO) with beamforming (BF) and orthogonal frequency division multiplexing (OFDM) signaling achieves highrate data transmission with a wide coverage area thanks to the high BF gain. The drawback to this transmission scheme is its high peak-to-average power ratio (PAPR). A high PAPR results from the transmission power variation among transmission antennas due to BF in addition to the multicarrier-based OFDM signaling. This paper investigates the performance of our previously reported adaptive PAPR reduction method using the null space in a MIMO channel in eigenmode massive MIMO-OFDM signals. The adaptive PAPR reduction method mitigates the degradation in data throughput due to the interference from the PAPR reduction signal generated by the clipping and filtering (CF) algorithm by restricting the transmission of the PAPR reduction signal to only the null space of the MIMO channel. In a massive MIMO scenario, since the number of spatial streams is generally much less than that of the transmitter antennas, the effect of the adaptive PAPR reduction method is expected to be enhanced due to the increase in the dimensions of the null space in the MIMO channel. Computer simulation results show that the adaptive PAPR reduction method is effective especially when (i) the number of transmitter antennas is large, (ii) the required PAPR is low, and (iii) the signal-to-noise ratio (SNR) is high.","PeriodicalId":320208,"journal":{"name":"2017 23rd Asia-Pacific Conference on Communications (APCC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122591203","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: 8

Compliance management for P2P systems P2P系统的合规管理

2017 23rd Asia-Pacific Conference on Communications (APCC) Pub Date : 2017-12-01 DOI: 10.23919/APCC.2017.8303961

A. Schneider, M. Mauve

引用次数: 0

Analysis of plasma sheath channel characteristics based on the shock tube experiment 基于激波管实验的等离子体鞘层通道特性分析

2017 23rd Asia-Pacific Conference on Communications (APCC) Pub Date : 2017-12-01 DOI: 10.23919/APCC.2017.8303984

Xuantao Lyu, W. Feng, N. Ge

引用次数: 2