2018 15th International Symposium on Wireless Communication Systems (ISWCS)最新文献_第7页

RSS-based Location and Transmit Power Estimation of Multiple Co-Channel Targets 基于rss的多同信道目标定位与发射功率估计

2018 15th International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2018-08-01 DOI: 10.1109/ISWCS.2018.8491105

E. Zandi, R. Mathar

引用次数: 3

Reinforcement Learning for Proactive Caching of Contents with Different Demand Probabilities 不同需求概率内容的主动缓存强化学习

2018 15th International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2018-08-01 DOI: 10.1109/ISWCS.2018.8491205

S. Somuyiwa, Deniz Gündüz, A. György

{"title":"Reinforcement Learning for Proactive Caching of Contents with Different Demand Probabilities","authors":"S. Somuyiwa, Deniz Gündüz, A. György","doi":"10.1109/ISWCS.2018.8491205","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491205","url":null,"abstract":"A mobile user randomly accessing a dynamic content library over a wireless channel is considered. At each time instant, a random number of contents are added to the library and each content remains relevant to the user for a random period of time. Contents are classified into finitely many classes such that whenever the user accesses the system, he requests each content randomly with a class-specific demand probability. Contents are downloaded to the user equipment (UE) through a wireless link whose quality also varies randomly with time. The UE has a cache memory of finite capacity, which can be used to proactively store contents before they are requested by the user. Any time contents are downloaded, the system incurs a cost (energy, bandwidth, etc.) that depends on the channel state at the time of download, and scales linearly with the number of contents downloaded. Our goal is to minimize the expected long-term average cost. The problem is modeled as a Markov decision process, and the optimal policy is shown to exhibit a threshold structure; however, since finding the optimal policy is computationally infeasible, parametric approximations to the optimal policy are considered, whose parameters are optimized using the policy gradient method. Numerical simulations show that the performance gain of the resulting scheme over traditional reactive content delivery is significant, and increases with the cache capacity. Comparisons with two performance lower bounds, one computed based on infinite cache capacity and another based on non-casual knowledge of the user access times and content requests, demonstrate that our scheme can perform close to the theoretical optimum.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126390852","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: 9

Resource Allocation and Relay Selection for Multi-User OFDM-Based Cooperative Networks with SWIPT 基于ofdm的SWIPT多用户协作网络资源分配与中继选择

2018 15th International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2018-08-01 DOI: 10.1109/ISWCS.2018.8491039

S. Gautam, E. Lagunas, S. Chatzinotas, B. Ottersten

{"title":"Resource Allocation and Relay Selection for Multi-User OFDM-Based Cooperative Networks with SWIPT","authors":"S. Gautam, E. Lagunas, S. Chatzinotas, B. Ottersten","doi":"10.1109/ISWCS.2018.8491039","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491039","url":null,"abstract":"In this paper, we investigate resource allocation and relay selection in a two-hop relay-assisted multi-user network, where the end users support Simultaneous Wireless Information and Power Transfer (SWIPT). In particular, we consider single-source assisted by a set of spatially distributed relays able to amplify-and-forward orthogonal frequency division multiplexing (OFDM) signals carrying both data and power at the same time. The users are assumed to implement a power splitting technique where the received signal is orthogonally split in two streams of different power levels, where one signal stream is sent to the power harvesting module while the other is converted to baseband for information decoding. We aim at optimizing the users' power splitting ratios as well as the relay, carrier and power assignment so that the end-users' sum-rate is maximized subject to transmitted and harvested power constraints. Such joint optimization is combinatorial in nature with a non-convex structure. Therefore, we present a sub-optimal low complex solution based on the harmonic mean of the two-hop relay channel coefficients. Simulation results reveal that the proposed algorithm provides significant performance gains in comparison with a semi-random resource allocation and relay selection approach.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126539595","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

[Copyright notice] (版权)

2018 15th International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2018-08-01 DOI: 10.1109/iswcs.2018.8491079

引用次数: 0

A Global Topology Based Broadcast Algorithm for VANETs 基于全局拓扑的vanet广播算法

2018 15th International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2018-08-01 DOI: 10.1109/ISWCS.2018.8491200

Ning Liu, Yubo Wu, Zhiqiang He, K. Niu, Chao Dong

引用次数: 1

Joint Uplink and Downlink Transmission Design for URLLC Using Finite Blocklength Codes 基于有限块长度码的URLLC联合上行和下行传输设计

2018 15th International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2018-08-01 DOI: 10.1109/ISWCS.2018.8491069

Chao Shen, Tsung-Hui Chang, Hanqing Xu, Yajun Zhao

引用次数: 9

Radio Resource Management for User-Centric JT-CoMP 以用户为中心的JT-CoMP无线电资源管理

2018 15th International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2018-08-01 DOI: 10.1109/ISWCS.2018.8491240

Tareq M. Shami, D. Grace, A. Burr, Muhammad D. Zakaria

引用次数: 5

Transmit Strategies for Massive Machine-Type Communications based on Mean Field Games 基于平均场博弈的大规模机器型通信传输策略

2018 15th International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2018-08-01 DOI: 10.1109/ISWCS.2018.8491236

Charles Bertucci, S. Vassilaras, J. Lasry, G. Paschos, M. Debbah, P. Lions

引用次数: 9

Non-Markovian Survivability Assessment Model for Infrastructure Wireless Networks 基础无线网络的非马尔可夫生存能力评估模型

2018 15th International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2018-08-01 DOI: 10.1109/ISWCS.2018.8491067

Lang Xie, P. Heegaard, Yuming Jiang

{"title":"Non-Markovian Survivability Assessment Model for Infrastructure Wireless Networks","authors":"Lang Xie, P. Heegaard, Yuming Jiang","doi":"10.1109/ISWCS.2018.8491067","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491067","url":null,"abstract":"Network design and operation of a mobile network infrastructure, especially its access points, need to consider survivability as a fundamental requirement. Quantifiable approaches to survivability analysis of such infrastructures are crucial. Most existing analytical models analyze the networks transient behaviors by applying homogeneous continuous-time Markov chain (CTMC). However, the distributions for transitions between states during a failure recovery are not exponential in many real cases. To address this problem, we first propose to use a non-Markovian model to characterize the transient behavior of the phased recovery of the network after a failure. Then, based on the proposed model, we conduct survivability analysis of the network. Moreover, numerical results are presented to validate the phase type (PH) approximation used in the proposed model. A case study illustrates the effects of different model parameters on the network's survivability. These results shed new insights not only on survivability analysis, e.g. the non-Markovian phased recovery model, but also on survivability provisioning, e.g. how the model parameters affect the network's survivability, of such a network against failure events.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115134689","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

Network Slicing in Local Non-Cellular Wireless Networks: A MC-CDMA-based Approach 局部非蜂窝无线网络中的网络切片:一种基于mc - cdma的方法

2018 15th International Symposium on Wireless Communication Systems (ISWCS) Pub Date : 2018-08-01 DOI: 10.1109/ISWCS.2018.8491194

Michael Karrenbauer, A. Weinand, Lianghai Ji, H. Schotten

{"title":"Network Slicing in Local Non-Cellular Wireless Networks: A MC-CDMA-based Approach","authors":"Michael Karrenbauer, A. Weinand, Lianghai Ji, H. Schotten","doi":"10.1109/ISWCS.2018.8491194","DOIUrl":"https://doi.org/10.1109/ISWCS.2018.8491194","url":null,"abstract":"The emergence of the Industrial Internet of Things (IIoT) makes wireless industrial communication systems currently a hot research topic which is in the focus of both industry and academia. Along with these systems, we also encounter challenges regarding the quality of service requirements, e.g. data rate requirements, latency constraints, different duty cycles et cetera. Consequently, the challenge for these systems is to enable different service types and guarantee the respective service requirements efficiently. Multi-Carrier Code Division Multiple Access (MC-CDMA) systems, combining multi-carrier (OFDM) and spread spectrum techniques, are known to offer high spectral efficiency, robustness and flexibility and are therefore a promising candidate in order to achieve that goal. For the CDMA part, standard Walsh-Hadamard spreading sequences are typically used in MC-CDMA systems. In this paper, a CDMA-based MAC layer design using partly overloaded spreading sequences, in order to enable network slicing functionalities of 5G cellular systems for local IIoT networks, is presented.","PeriodicalId":272951,"journal":{"name":"2018 15th International Symposium on Wireless Communication Systems (ISWCS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123934451","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