2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS)最新文献_第2页

Combining the multi-agent flood algorithm with frontier-based exploration in search & rescue applications 多智能体洪水算法与基于边界的搜索在搜救应用中的结合

2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS) Pub Date : 2017-07-01 DOI: 10.23919/SPECTS.2017.8046775

F. Blatt, H. Szczerbicka

{"title":"Combining the multi-agent flood algorithm with frontier-based exploration in search & rescue applications","authors":"F. Blatt, H. Szczerbicka","doi":"10.23919/SPECTS.2017.8046775","DOIUrl":"https://doi.org/10.23919/SPECTS.2017.8046775","url":null,"abstract":"The Multi-Agent Flood algorithm is an algorithm to control multiple autonomous agents to explore unknown terrain and to find p oints of interest in t he newly uncovered territory. It does so by using a mix of indirect and direct communication. The direct communication via radio signals allows for a faster exchange of data between the agents. This layered communication model allows for a robust data transfer that is needed in SAR scenarios, as the algorithm can still use the indirect part of the model if the direct part is not available anymore. Currently the exploration done by the agents is decided randomly without any intelligent input based on the gathered data. The agents will simply try to move along a line until they will hit an obstacle or a point of interest is found. This work introduces ways to steer the autonomous agents based on the collected data, additionally this data will be used to decide which part of the map should be explored next. Another optimization of the performance is also the increased cooperation between the agents, as the agents will also exchange these destination points, thus reducing the number of agents which will explore the same part of the area, leading to a greater spread of the agents through the terrain.","PeriodicalId":224620,"journal":{"name":"2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132519300","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

Software defined storage: Availability modeling and sensitivity analysis 软件定义存储:可用性建模和敏感性分析

2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS) Pub Date : 2017-07-01 DOI: 10.23919/SPECTS.2017.8046765

M. Mauro, M. Longo, F. Postiglione, Giuliana Carullo, M. Tambasco

{"title":"Software defined storage: Availability modeling and sensitivity analysis","authors":"M. Mauro, M. Longo, F. Postiglione, Giuliana Carullo, M. Tambasco","doi":"10.23919/SPECTS.2017.8046765","DOIUrl":"https://doi.org/10.23919/SPECTS.2017.8046765","url":null,"abstract":"Software Defined Storage (SDS) systems are crucial elements in cloud environments, where huge amount of data managed by content and network providers (multimedia content, social data, gaming data etc.) are typically strongly unstructured. Such data, referred to as objects, are handled along with their metadata allowing a web-based addressing as in the REST paradigm. According to the Software Defined concepts, SDS systems rely on decoupling the software plane (namely the set of management services), from the hardware plane (typically common, inexpensive and vendor unlocked hardware). SWIFT (a part of the OpenStack cloud project) represents a valuable example of an SDS system which, in the present work, we intend to characterize in terms of availability. Through such a characterization the minimum cost configuration can be selected, guaranteeing the so-called “five nines” availability requirement. The availability analysis is here performed by modeling the highlevel architecture of SWIFT as a Stochastic Reward Net (SRN) model. Furthermore, a sensitivity analysis is performed to assess the system robustness with respect to variations of some model parameters.","PeriodicalId":224620,"journal":{"name":"2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132976008","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

Achieving maximal sum-rate capacity of two-way cognitive radio with relays operating in separate bands through MO 通过MO实现双向认知无线电的最大和速率容量

2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS) Pub Date : 2017-07-01 DOI: 10.23919/SPECTS.2017.8046772

U. Pareek, D. Lee

引用次数: 1

Using ZeroMQ as communication/synchronization mechanisms for IO requests simulation 使用ZeroMQ作为IO请求仿真的通信/同步机制

2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS) Pub Date : 2017-07-01 DOI: 10.23919/SPECTS.2017.8046773

Sebastien Gougeaud, S. Zertal, J. Lafoucriere, Philippe Deniel

{"title":"Using ZeroMQ as communication/synchronization mechanisms for IO requests simulation","authors":"Sebastien Gougeaud, S. Zertal, J. Lafoucriere, Philippe Deniel","doi":"10.23919/SPECTS.2017.8046773","DOIUrl":"https://doi.org/10.23919/SPECTS.2017.8046773","url":null,"abstract":"Using simulation to study the behavior of large-scale data storage systems becomes capital to predict the performance and the reliability of any of them at a lower cost. This helps to take the right decisions before the system development and deployment. OGSSim is a simulation tool for large and heterogeneous storage systems that uses parallelism to provide informations about the behavior of such systems in a reduced time. It uses ZeroMQ communication library to implement not only the data communication but also the synchronization functions between the generated threads. These synchronization points occur during the requests parallel execution and need to be treated efficiently to ensure data coherency for the fast and accurate computation of performance metrics. In this work, different issues due to the parallel execution of our simulation tool OGSSim are presented and the adopted solutions using ZeroMQ are discussed. The impact of these solutions in term of simulation time overhead are measured considering various system configurations. The obtained results s how t hat ZeroMQ has almost no impact on the simulation time, even for complex and large configurations.","PeriodicalId":224620,"journal":{"name":"2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127958373","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

An efficient conflict-free memory-addressing unit for SIMD VLIW DSP SIMD VLIW DSP的高效无冲突内存寻址单元

2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS) Pub Date : 2017-07-01 DOI: 10.23919/SPECTS.2017.8046778

Hong Ye, Naijie Gu, Xiaoci Zhang, Chuanwen Lin

{"title":"An efficient conflict-free memory-addressing unit for SIMD VLIW DSP","authors":"Hong Ye, Naijie Gu, Xiaoci Zhang, Chuanwen Lin","doi":"10.23919/SPECTS.2017.8046778","DOIUrl":"https://doi.org/10.23919/SPECTS.2017.8046778","url":null,"abstract":"With the rapid expansion in multi-media and signal processing applications, DSP processors with high-performance execution and low-power consumption evoke to be the trend. As these applications are often characterised by a huge number of data accesses, the computation efficiency often be heavily decreased by bank conflicts on account of non-aligned and irregular data accesses. This paper presents an efficient memory accessing unit called Mod-N Address for the DSP processor. The unit is designed for solving bank conflicts when data accessing is irregular or not aligned. The proposed architecture implements the conflict-free access by generating addresses through modulus operation and accessing along the diagonal. The structure adjusts the sequence of data when accessing and requires quite little changes to the instruction set. The unit had been implemented on our platform BWDSP104x, and the experimental results had shown that proposed unit achieves an 45% accelerate rate for FFT algorithm compared with the previous scheme. According to the comparison with the conventional methods, experimental evaluations also show that mod-N address can outperform by an average of 7.9% to 60% in performance.","PeriodicalId":224620,"journal":{"name":"2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115614037","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

A new switched beam smart antenna model for supporting asymmetrical communications extending Inet Omnet++ framework 扩展Inet omnet++框架的一种支持非对称通信的新型交换波束智能天线模型

2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS) Pub Date : 2017-07-01 DOI: 10.23919/SPECTS.2017.8046781

Vincenzo Inzillo, F. Rango, A. Santamaria, A. Ariza-Quintana

{"title":"A new switched beam smart antenna model for supporting asymmetrical communications extending Inet Omnet++ framework","authors":"Vincenzo Inzillo, F. Rango, A. Santamaria, A. Ariza-Quintana","doi":"10.23919/SPECTS.2017.8046781","DOIUrl":"https://doi.org/10.23919/SPECTS.2017.8046781","url":null,"abstract":"Directional antennas are largely employed in wireless networks due to their capability of increasing spatial reuse of the wireless channel with respect to the classical omnidirectional systems. In this context. the use of Smart Antenna Systems (SAS) are providing a strong increasing impact in digital wireless communication systems. Because of their many benefits, this kind of systems are extremely used especially in pervasive network environments such as Mobile Ad hoc Networks (MANET). However, almost of the whole of existing network simulators use omnidirectional antennas on nodes, and in many cases, do not provide a support for asymmetrical and directional communications. In view of this, we intend to enhance Omnet++ network simulator features by designing a new switched beam smart antenna model for providing a support for directional communications. Our proposed model simulates the basic operation of a Phased Array System also exploiting a very simple algorithm for modeling power management in the channel in order to provide an asymmetrical communication behavior.","PeriodicalId":224620,"journal":{"name":"2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114953036","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

Dynamic deployment of UAV-enabled floating access points for serving hot zones 动态部署支持无人机的浮动接入点，为热点地区提供服务

2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS) Pub Date : 2017-07-01 DOI: 10.23919/SPECTS.2017.8046766

Amar Nath Patra, S. Sengupta

{"title":"Dynamic deployment of UAV-enabled floating access points for serving hot zones","authors":"Amar Nath Patra, S. Sengupta","doi":"10.23919/SPECTS.2017.8046766","DOIUrl":"https://doi.org/10.23919/SPECTS.2017.8046766","url":null,"abstract":"Unmanned Aerial Vehicles (UAVs) have manifold applications and profound research potential. They can fairly act as access points serving users by forming a mesh network in the air. In disaster hit areas or battlefields, providing communication through infrastructure is impossible due to either time constraints or impracticable ground conditions. The UAVs can be dynamically deployed in such scenarios, forming a mesh network and thereby providing wireless coverage to the users. In this paper, we develop an algorithm, UAVs' Dynamic Positions Rearrangement (UDPR), based on the dynamic demands of the Hot Zones which strives to maximize the total coverage area by all the deployed UAVs hence, serving maximum number of users. Our algorithm caters to the dynamic changes in user load requirements for which the UAVs fly in flock to cover the Hot Zones, at the same time minimize the dead zones. UDPR ensures improved performance of the network by selecting UAVs based on minimum movement and maximum remaining battery life. In our algorithm, we compare two distance traveling approaches while rearranging UAVs: the Juxtapositioning approach (attaining closest possible position) and the Hot Center positioning approach (attaining the Hot Center's position). The Hot Center represents the epicenter of the area corresponding to the overload of spectrum demand in the Hot Zone. The simulation results show that the proposed Hot Center Positioning approach outperforms the primitive Juxtapositioning approach by covering more area (serving more number of users) and at the same time keeping more number of UAVs active.","PeriodicalId":224620,"journal":{"name":"2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124990349","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

Disk failure prediction in heterogeneous environments 异构环境下的磁盘故障预测

2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS) Pub Date : 2017-07-01 DOI: 10.23919/SPECTS.2017.8046776

C. CarlosA.Rincon, Jehan-Francois Pâris, R. Vilalta, A. Cheng, D. Long

{"title":"Disk failure prediction in heterogeneous environments","authors":"C. CarlosA.Rincon, Jehan-Francois Pâris, R. Vilalta, A. Cheng, D. Long","doi":"10.23919/SPECTS.2017.8046776","DOIUrl":"https://doi.org/10.23919/SPECTS.2017.8046776","url":null,"abstract":"Recent studies have shown the benefits of using SMART attributes to predict disk failures in homogeneous populations of disks from the same make and model. We address here the case of data centers with more heterogeneous disk populations, such as the ones described in the BackBlaze datasets, and propose to build global disk failure predictors that would apply to disks of all makes and models. Our first challenge was the large number of SMART parameters that were missing for most makes and models in many disk instances of our dataset. As a result, we had to discard the SMART attributes that were missing in at least 90 percent of the disks, which left us with 21 SMART attributes. We then applied a Reverse Arrangement Test to these attributes to select the strongest disk failure indicators. We investigated three different machine learning models (Decision Trees, Neural Networks, and Logistic Regression) using the 2015 BackBlaze data to train and validate our predictors. Our best model was a decision tree that identified t rue failure events among the disks that tested positive for at least one of our failure indicators. We then used the 2016 BackBlaze data to evaluate its performance. Our results show that our decision tree identifies at least 52 percent of all disk failures and makes nearly all its predictions several days ahead: no more than 2.45 percent of the predicted failures occur within one day or two of the prediction. Finally, we compared the performance of our predictor with those of the RAIDShield and the original BackBlaze predictor. We found out that RAIDShield could predict at most 18 percent of disk failures, that is, 34 percent fewer failures than our decision tree while the BackBlaze predictor predicted 60 percent of disk failures but generated 4 to 5 false alarms per correct prediction.","PeriodicalId":224620,"journal":{"name":"2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130384189","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: 36

Impact of propagation model on capacity in small-cell networks 小蜂窝网络中传播模型对容量的影响

2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS) Pub Date : 2017-07-01 DOI: 10.23919/SPECTS.2017.8046782

Sofia Sousa, F. Velez, J. Peha

引用次数: 9

Cooperation between data modeling and simulation modeling for performance analysis of Hadoop Hadoop性能分析中数据建模与仿真建模的配合

2017 International Symposium on Performance Evaluation of Computer and Telecommunication Systems (SPECTS) Pub Date : 2017-07-01 DOI: 10.23919/SPECTS.2017.8046769

B. Kim, T. Kim

引用次数: 4