2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)最新文献_第8页

A multi-tier cooperative resource partitioning technique for interference mitigation in heterogeneous cellular networks 异构蜂窝网络中一种多层协同资源分配技术

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt) Pub Date : 2014-05-12 DOI: 10.1109/WIOPT.2014.6850297

Rajkarn Singh, Sudeepta Mishra, C. Murthy

{"title":"A multi-tier cooperative resource partitioning technique for interference mitigation in heterogeneous cellular networks","authors":"Rajkarn Singh, Sudeepta Mishra, C. Murthy","doi":"10.1109/WIOPT.2014.6850297","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850297","url":null,"abstract":"In Heterogeneous cellular networks (HetNets), co-channel interference is a major concern due to the co-existence of multiple base stations with overlaid regions. Edge users are typically the victims because of high interference exposure. To counter this high interference, picocells communicate with the edge users in protected subframes (PSF). The severity of the problem intensifies in case of hotspot deployment, where picocells cannot provide coverage to the entire hotspot, thus forming a dense ring of macrocell users around picocells. We argue that these macrocell users are also victims, constituting a significant victim user population in hotspot deployment. We propose that, along with the macrocell muting during PSF, picocells should also be operated in cooperative manner with macrocell, and be barred from transmission during some of the subframes for protection of these macrocell victim users. We define a utility function to find the optimal values of PSF density for both macrocell and picocells, which would increase victim user throughput thereby enhancing system fairness. Exhaustive simulations illustrate that the proposed scheme improves victim user throughput significantly, while maintaining the overall system capacity.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134624709","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

Relaying and stability in energy harvesting simple networks 能量收集简单网络中的中继和稳定性

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt) Pub Date : 2014-05-12 DOI: 10.1109/WIOPT.2014.6850344

M. Kashef, A. Ephremides

{"title":"Relaying and stability in energy harvesting simple networks","authors":"M. Kashef, A. Ephremides","doi":"10.1109/WIOPT.2014.6850344","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850344","url":null,"abstract":"Wireless systems of rechargeable nodes have extended lifetime and are self-sufficient. The transmission policies in these systems need to adapt to the harvested energy availability. In this work, we investigate the interaction between relaying, energy harvesting, and stability. We introduce the problem of general relaying cost minimization for cooperative energy harvesting networks. We consider a simple network in which a source transmits to a destination through network-level cooperation with a number of relay nodes. The source and the relays have energy harvesting capability. To adapt the relaying process to the available harvested energy, we exploit partial relay cooperation in which the flows through the relays are controlled. The relaying cost minimization problem is feasible when the data queues of the source and the relays are stable. The stability conditions of the data queues are derived. Then, we introduce the energy consumption as a cost criterion for the optimization problem to find an energy-efficient partial relaying protocol. We assess the effect of partial relay cooperation compared to the cases of no cooperation and full relay cooperation.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"230 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134257376","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

Experiments with aLS-Coop-Loc cooperative combined localization and time-synchronization aLS-Coop-Loc协同结合定位与时间同步的实验

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt) Pub Date : 2014-05-12 DOI: 10.1109/WIOPT.2014.6850283

W. V. Kleunen, N. Moseley, N. Meratnia, P. Havinga

引用次数: 3

Homology based algorithm for disaster recovery in wireless networks 基于同构的无线网络灾难恢复算法

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt) Pub Date : 2014-05-12 DOI: 10.1109/WIOPT.2014.6850366

A. Vergne, I. Flint, L. Decreusefond, P. Martins

引用次数: 8

A cost analysis of Wireless Mesh Networks 无线网状网络的成本分析

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt) Pub Date : 2014-05-12 DOI: 10.1109/WIOPT.2014.6850319

Valerio Targon

引用次数: 2

Revisiting optimal power control: Dual effects of SNR and contention 再论最优功率控制:信噪比和竞争的双重影响

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt) Pub Date : 2014-05-12 DOI: 10.1109/WIOPT.2014.6850292

Yang Liu, M. Liu, Jing Deng

{"title":"Revisiting optimal power control: Dual effects of SNR and contention","authors":"Yang Liu, M. Liu, Jing Deng","doi":"10.1109/WIOPT.2014.6850292","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850292","url":null,"abstract":"In this paper we study a transmission power-tune/control problem in the context of 802.11 Wireless Local Area Networks (WLANs) with multiple (and possibly densely deployed) access points (APs). Previous studies on power control tend to focus on one aspect of the control, either its effect on transmission capacity (PHY layer) assuming simultaneous transmissions, or its effect on contention order (MAC layer) by maximizing spatial reuse. We observe that power control has a dual effect: it affects both spatial reuse and capacity of active transmission; moreover, maximizing the two separately is not always aligned in maximizing system throughput and can even point in opposite directions. In this paper we introduce an optimization formulation that takes into account this dual effect, by measuring the impact of transmit power on system performance from both PHY and MAC layers. We show that such an optimization problem is intractable and develop an analytical framework to construct simple yet efficient solutions. Through numerical results, we observe clear benefits of this dual-effect model compared to solutions by trying to maximize spatial reuse and transmission capacity separately. This problem does not invoke cross-layer design, as the only degree of freedom in design resides with transmission power. It however highlights the complexity in tuning certain design parameters, as the change may manifest itself differently at different layers which may be at odds.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132893530","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

CoPS: Context Prefetching handover scheme on 4G outdoor small cell testbed cop:基于4G室外小蜂窝试验台的上下文预取切换方案

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt) Pub Date : 2014-05-12 DOI: 10.1109/WIOPT.2014.6850278

Ping-Jung Hsieh, Po-Hung Lin, Yu-Chen Lee, Rong-Dong Chiu, Hung-Yu Wei, Wen-Hsin Wei

{"title":"CoPS: Context Prefetching handover scheme on 4G outdoor small cell testbed","authors":"Ping-Jung Hsieh, Po-Hung Lin, Yu-Chen Lee, Rong-Dong Chiu, Hung-Yu Wei, Wen-Hsin Wei","doi":"10.1109/WIOPT.2014.6850278","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850278","url":null,"abstract":"Mobility enhancements of small-cell networks in the IEEE/3GPP standard meeting is an important issue, where the mobility robustness is aimed at the prevention and solution of connection failure/exceptions that occur as a result of uncertain channel condition or aggressive mobility. Although exception handling, such as uncontrolled handover and connection re-establishment, is supported in a 4G wireless network system, it still results in a lengthy yet acceptable handover duration. Notably, the results from commercial 4G cellular systems show that the preparation phase period accounting for 19% of the controlled handover duration is long and prone to uncompleted handover. In this work, we propose a Context Prefetching handover Scheme (CoPS) for 4G broadband wireless access networks in order to effectively reduce the lengthy preparation phase period in the controlled handover procedure without any modifications on user side. We also propose two triggering mechanisms according to the mobility scenario for a trade-off between the overhead and the benefit of prefetching. We implement CoPS and the triggering mechanisms on a WiMAX small-cell network platform of outdoor small cell base-stations. Our field trial results show significant improvements of CoPS in a reduction of the preparation phase period by 78% as well as a reduction of handover duration by 17% and in negligible resource occupation overhead. The proposed solutions also can be introduced into existing LTE infrastructures.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115413451","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

Physical limits of point-to-point communication systems 点对点通信系统的物理限制

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt) Pub Date : 2014-05-12 DOI: 10.1109/WIOPT.2014.6850354

Bhanukiran Perabathini, V. S. Varma, M. Debbah, M. Kountouris, A. Conte

引用次数: 2

Energy-efficiency and future knowledge tradeoff in small cells prediction-based strategies 基于小细胞预测策略的能源效率和未来知识权衡

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt) Pub Date : 2014-05-12 DOI: 10.1109/WIOPT.2014.6850277

Matthieu De Mari, E. Strinati, M. Debbah

{"title":"Energy-efficiency and future knowledge tradeoff in small cells prediction-based strategies","authors":"Matthieu De Mari, E. Strinati, M. Debbah","doi":"10.1109/WIOPT.2014.6850277","DOIUrl":"https://doi.org/10.1109/WIOPT.2014.6850277","url":null,"abstract":"Predictive small cells networks and proactive resource allocation are considered as one of the key mechanisms for increasing the long-term energy-efficiency of communication networks. Learning techniques exploit repetitive patterns in human behavior to predict some future transmission contexts of the network. In this paper, we target to improve the energy efficiency of delay-tolerant transmissions by enabling flexibility in resource allocation with prediction-based strategies. We study the performance, in terms of energy efficiency of several scenarios of future knowledge ranging from zero to perfect knowledge of the future context, but also partial knowledge scenarios (short-term predictions, long-term statistics or partial knowledge). An iterative process, approaching the optimal strategies in each scenario, is described. In some cases, closed-form expressions of the optimal strategies to be implemented can be obtained and the performance in each scenario is computed. Our analytical and numerical results assess the potential benefit of exploiting the knowledge of the future in the case of a delay-tolerant transmission and show how the system may benefit from a provided piece of information about the future transmission context.","PeriodicalId":381489,"journal":{"name":"2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122400638","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

Energy efficiency analysis of relay-assisted cellular networks using stochastic geometry 基于随机几何的中继辅助蜂窝网络能量效率分析

2014 12th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WiOpt) Pub Date : 2014-05-12 DOI: 10.1109/WIOPT.2014.6850363

Huan Yu, Yunzhou Li, M. Kountouris, Xibin Xu, Jing Wang

引用次数: 11