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International Latin American Networking Conference最新文献

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Evaluating the impact of an acknowledgment strategy for APRP 评估确认策略对APRP的影响
International Latin American Networking Conference Pub Date : 2009-09-24 DOI: 10.1145/1636682.1636695
C. M. Nunes, Eduardo Link, F. Dotti
{"title":"Evaluating the impact of an acknowledgment strategy for APRP","authors":"C. M. Nunes, Eduardo Link, F. Dotti","doi":"10.1145/1636682.1636695","DOIUrl":"https://doi.org/10.1145/1636682.1636695","url":null,"abstract":"Routing in Delay Tolerant Networks (DTNs) is an aspect of current research. In this kind of network disconnections are frequent and nodes have limited resources, making the design of new routing strategies a challenging task. In previous work we have proposed APRP (Adaptive Potential Routing Protocol) and compared with existing protocols. APRP uses the mobility behavior of each node, captured by the number of meetings with other nodes during a time interval, to decide on the forwarding of messages. In this paper we analyze the impact of adding a confirmation strategy to this protocol. To evaluate that, an extended set of performance metrics is briefly discussed and applied using an extended simulation environment specific for DTNs.","PeriodicalId":415618,"journal":{"name":"International Latin American Networking Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121097409","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
An improved model for GSM/GPRS/EDGE performance evaluation GSM/GPRS/EDGE性能评估的改进模型
International Latin American Networking Conference Pub Date : 2007-10-10 DOI: 10.1145/1384117.1384122
Copca
{"title":"An improved model for GSM/GPRS/EDGE performance evaluation","authors":"Copca","doi":"10.1145/1384117.1384122","DOIUrl":"https://doi.org/10.1145/1384117.1384122","url":null,"abstract":"Nowadays massive access to the new cellular technologies is no longer an idea but a tangible reality. Among them, the GSM/GPRS/EDGE architecture represents without any question the most worldwide spread of them. Costs decreases in both infrastructure and personal equipment has largely increased the number of users. This abrupt growth poses a difficult challenge for telecom operators when it comes to dimensioning and evaluating the performance of their networks.\u0000 Previous works have studied the problem of modelling GSM/GPRS/EDGE networks, paying little attention to many technical implementation features of determinant impact. This work addresses the performance evaluation problem of these networks, focusing on the influence of different operational details. Different data and voice models are studied, including a traffic prioritization model of great relevance facing the increasing popularity of new multimedia services offered through these networks. The proposed models are finally applied to the performance evaluation of the local operator's network.","PeriodicalId":415618,"journal":{"name":"International Latin American Networking Conference","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117229637","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: 11
A methodology for designing accurate anomaly detection systems 一种设计精确异常检测系统的方法
International Latin American Networking Conference Pub Date : 2007-10-10 DOI: 10.1145/1384117.1384137
K. Ingham, Anil Somayaji
{"title":"A methodology for designing accurate anomaly detection systems","authors":"K. Ingham, Anil Somayaji","doi":"10.1145/1384117.1384137","DOIUrl":"https://doi.org/10.1145/1384117.1384137","url":null,"abstract":"Anomaly detection systems have the potential to detect zero-day attacks. However, these systems can suffer from high rates of false positives and can be evaded through through mimicry attacks. The key to addressing both problems is careful control of model generalization. An anomaly detection system that undergeneralizes generates too many false positives, while one that overgeneralizes misses attacks. In this paper, we present a methodology for creating anomaly detection systems that make appropriate trade-offs regarding model precision and generalization. Specifically, we propose that systems be created by taking an appropriate, undergeneralizing data modeling method and extending it using data pre-processing generalization heuristics. To show the utility of our methodology, we show how it has been applied to the problem of detecting malicious web requests.","PeriodicalId":415618,"journal":{"name":"International Latin American Networking Conference","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126725209","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
E-buhonero: a proposal to alleviate the problem of people selling goods on the Venezuelan streets E-buhonero:旨在缓解委内瑞拉街头卖东西的人的问题
International Latin American Networking Conference Pub Date : 2007-10-10 DOI: 10.1145/1384117.1384138
M. E. Villapol, A. Peña, Daniel Cruz, Claudia Fuenmayor
{"title":"E-buhonero: a proposal to alleviate the problem of people selling goods on the Venezuelan streets","authors":"M. E. Villapol, A. Peña, Daniel Cruz, Claudia Fuenmayor","doi":"10.1145/1384117.1384138","DOIUrl":"https://doi.org/10.1145/1384117.1384138","url":null,"abstract":"Buhonero is a Spanish word which refers to a person who sells goods on the streets (i.e. a peddler). In the last years, the number of peddlers has increased in Venezuela causing problems such as traffic jams, frequently assaults and robberies and a lot of garbage leaving on the streets close to peddler stands. In the last months, local governments are trying to solve the problem by prohibiting them to be on some public places. On the other hand, e-commerce provides an option to people sell goods on line. In Venezuela, there are more than a hundred of public communication centers and many others which are private. This situation provides an acceptable scenario to intend to alleviate the problem of people selling goods on Venezuelan streets by developing an e-commerce-based solution, called e-buhonero. This paper describes e-buhonero together with the design issues and presents an initial web-based interface.","PeriodicalId":415618,"journal":{"name":"International Latin American Networking Conference","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131037650","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
Fighting packet loss on IP video streams 防止IP视频流丢包
International Latin American Networking Conference Pub Date : 2007-10-10 DOI: 10.1145/1384117.1384128
José M. Piquer, F. Lalanne, Cristian Junge
{"title":"Fighting packet loss on IP video streams","authors":"José M. Piquer, F. Lalanne, Cristian Junge","doi":"10.1145/1384117.1384128","DOIUrl":"https://doi.org/10.1145/1384117.1384128","url":null,"abstract":"Packet loss is a major consideration factor, especially in real-time applications. Since it cannot be avoided, its effect has to be minimized. We propose an end-to-end approach, analyzing different transmission strategies and error concealment methods to minimize image degradation at the receiver. The proposed system uses pixel shuffling techniques for packet transmission and median filtering concealment techniques for diminishing the impact produced by losses.","PeriodicalId":415618,"journal":{"name":"International Latin American Networking Conference","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131848642","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
Handling HTTP flows over a DiffServ framework 在DiffServ框架上处理HTTP流
International Latin American Networking Conference Pub Date : 2007-10-10 DOI: 10.1145/1384117.1384131
S. Alcaraz, K. Gilly, C. Juiz, R. Puigjaner
{"title":"Handling HTTP flows over a DiffServ framework","authors":"S. Alcaraz, K. Gilly, C. Juiz, R. Puigjaner","doi":"10.1145/1384117.1384131","DOIUrl":"https://doi.org/10.1145/1384117.1384131","url":null,"abstract":"DiffServ architecture has been widely used to achieve QoS over the Internet. Taking into account that web traffic is the most extended protocol over the Internet community, many solutions have been proposed to supply certain QoS to this type of service. Traditionally, DiffServ architectures have considered two-color markings in order to distinguish between high and low priorities. We study the special treatment for web flows. The web traffic pattern is very close to mouse and elephant distribution flows in Internet. We differentiate flows into short and long classes in order to ensure QoS for short flows, but we try to achieve certain QoS for some long flows. We classify the incoming flows into mice, hybrids and elephants, using three-color markings for each kind of flow, and a three-queue system at the DiffServ system. First of all, we need to detect the gaps in the bandwidth. With these gaps we look for candidate flows to be promoted (hybrids). These hybrid flows will be sent to high priority queue. Next we look for extremely long flows (elephants) which reduce drastically the web traffic performance. Elephant flows will be sent over the low priority queue in order to avoid the promotion of these flows and permit other aspirants to be promoted. Some stochastic functions are computed for the classification at the DiffServ system. Finally, the PLF algorithm is proposed which improves the global performance of the web traffic related with mean of transmission latency and packet loss. We have used ns2 network simulator tool for the simulation with the PackMime-HTTP object for the realistic synthetic web traffic generation.","PeriodicalId":415618,"journal":{"name":"International Latin American Networking Conference","volume":"50 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132624774","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
A user perspective for end-to-end quality of service evaluation in multimedia networks 多媒体网络中端到端服务质量评估的用户视角
International Latin American Networking Conference Pub Date : 2007-10-10 DOI: 10.1145/1384117.1384136
P. Casas, P. Belzarena, Ignacio Irigaray, Diego Guerra
{"title":"A user perspective for end-to-end quality of service evaluation in multimedia networks","authors":"P. Casas, P. Belzarena, Ignacio Irigaray, Diego Guerra","doi":"10.1145/1384117.1384136","DOIUrl":"https://doi.org/10.1145/1384117.1384136","url":null,"abstract":"Despite a large literature in Quality of Service (QoS) evaluation, end-user QoS provisioning remains an open research field. There is no general agreement about what to measure and how to do it in order to ensure real quality levels. Even more, new heterogeneous multimedia applications have redefined the problem, turning many previous implementations no longer appropriate for current scenario.\u0000 This paper addresses the problem of QoS assessment of a multimedia service over IP as perceived by humans, applying statistical learning techniques. We describe two end-to-end performance evaluation methodologies, the former based on Perceived QoS (PQoS) and the latter based on functional nonparametric regression. By merging them we build an improved system for end-to-end PQoS evaluation which allows analysing and better understanding the tradeoffs between different proposed techniques in the field.","PeriodicalId":415618,"journal":{"name":"International Latin American Networking Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127626174","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
End-to-end measurements over GPRS-EDGE networks 通过GPRS-EDGE网络进行端到端测量
International Latin American Networking Conference Pub Date : 2007-10-10 DOI: 10.1145/1384117.1384134
J. Negreira, Javier Pereira, S. Pérez, P. Belzarena
{"title":"End-to-end measurements over GPRS-EDGE networks","authors":"J. Negreira, Javier Pereira, S. Pérez, P. Belzarena","doi":"10.1145/1384117.1384134","DOIUrl":"https://doi.org/10.1145/1384117.1384134","url":null,"abstract":"In the last years, QoS (Quality of Service) parameter estimation has become a main research area in networking due to a continuous growth of the Internet. End-to-end active measurement is one of the topics that focuses on this research area. However, these measurement methodologies have focused on end-to-end measurements over the wired Internet. The development of cellular data services is shifting the resarch focus on QoS from wired to wireless networks. End-to-end measurement methodologies of cellular networks have some issues that are not considered by traditional measurement techniques. This paper analyzes these issues and suggests an end-to-end active measurement methodology that deals with these particular problems. The proposed research and measurement methodology is based on a GSM (Global System for Mobile Communications) network, particularly on data services on a GPRS-EDGE (General Packet Radio Service/Enhanced Data Rates for GSM Evolution) network. Several experiments in different situations have been done in a real cellular network. These experiments have tested the performance of the methodology in different data access conditions.","PeriodicalId":415618,"journal":{"name":"International Latin American Networking Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124162564","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
Design and implementation of a scalable constraint-based routing module for QoS path computation QoS路径计算的可伸缩约束路由模块的设计与实现
International Latin American Networking Conference Pub Date : 2007-10-10 DOI: 10.1145/1384117.1384132
P. Gainza, H. Cancela, E. Grampín, María E. Urquhart
{"title":"Design and implementation of a scalable constraint-based routing module for QoS path computation","authors":"P. Gainza, H. Cancela, E. Grampín, María E. Urquhart","doi":"10.1145/1384117.1384132","DOIUrl":"https://doi.org/10.1145/1384117.1384132","url":null,"abstract":"Quality of Service in computer networks depends on several variables like bandwidth, delay, jitter, cost, and packet loss which affect the overall user experience. In Multiprotocol Label Switching Networks, paths can be established end-to-end and resources can be guaranteed on each hop. However, due to several reasons, among them the computational cost involved, these paths are normally computed with constraints for only one variable. In this paper we propose a design and implementation of a scalable module for multi-constraint path computation in the context of the Path Computation Element architecture. We present all the design issues involved in an integral solution that accounts for all problems involved, some examples of the problem, and a scalable architecture to solve it. Finally, we present our performance results on simulated scenarios and real world networks.","PeriodicalId":415618,"journal":{"name":"International Latin American Networking Conference","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131629653","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
Incremental provision of QoS guarantees using only available QoS-aware routers 仅使用可用的QoS感知路由器增量提供QoS保证
International Latin American Networking Conference Pub Date : 2007-10-10 DOI: 10.1145/1384117.1384133
Alfonso Gazo-Cervero, J. L. Sánchez, Francisco-Javie Rodríguez-Pérez
{"title":"Incremental provision of QoS guarantees using only available QoS-aware routers","authors":"Alfonso Gazo-Cervero, J. L. Sánchez, Francisco-Javie Rodríguez-Pérez","doi":"10.1145/1384117.1384133","DOIUrl":"https://doi.org/10.1145/1384117.1384133","url":null,"abstract":"Most proposals related to QoS provision on the Internet share a common requirement to be deployed: every router within every Autonomous System of the Internet needs to be upgraded to support specific procedures for QoS provision. The main aim of the proposal presented in this paper is to allow QoS provision over IP networks without the need for upgrades at every router. In this paper, an overlay topology is built up only from routers which support QoS provision features and it is managed by an agent called Network Broker. Upgrading some routers within the network is still needed, but there are no constraints as to which routers should be upgraded. As a result, providers could incrementally deploy QoS services over their networks. Using two new routing algorithms, results confirm that the more routers that are upgraded, the better the capacity of the network to provide QoS services.","PeriodicalId":415618,"journal":{"name":"International Latin American Networking Conference","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127269256","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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