首页 > 最新文献

Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems最新文献

英文 中文
Efficient new delayed ACK for TCP: old problem, new insight TCP有效的新延迟ACK:老问题,新见解
Ming Li, Andrey Lukyanenko, S. Tarkoma, Antti Ylä-Jääski
When a TCP connection experiences a timeout, the sender must wait at least RTOmin (Minimum Retransmission Timeout) before doing the retransmission, during which the channel may be completely idle, undermining the throughput and channel efficiency. In this paper, we investigate the origin of RTOmin and find that it is needed to mitigate against spurious timeouts when the Delayed ACK (DA) scheme for TCP is implemented. Motivated by this observation, we propose a deployable and TCP-compatible new Delayed ACK (NDA) to replace the legacy DA. Our solution differs with previous work is that instead of using complex algorithms or fine-grained timer to tune RTOmin, we modify the DA scheme with minor changes to allow the sender to remove the RTOmin constraint while reserving the delayed ACK function at the receiver. In order to eliminate the aggressiveness of RTO (Retransmission Timeout) after removing RTOmin, we use coding techniques to encode the timeout retransmitted packets to make the potential spurious retransmissions useful. The simulation results demonstrate that in lossy wireless networks, NDA is efficient, because it achieves much higher TCP goodput and channel efficiency compared to DA. The gain we obtain by the use of NDA comes from two-order effects. One effect comes from removing the RTOmin constraint, because small RTO timer makes TCP react quickly to timeouts, resulting in small transmission idle. The other effect comes from eliminating consecutive RTO by allowing the receiver to acknowledge each timeout retransmission, which further reduces the RTO idle.
当TCP连接超时时,发送方必须等待至少RTOmin(最小重传超时)才能进行重传,在此期间通道可能完全空闲,从而降低吞吐量和通道效率。在本文中,我们研究了RTOmin的起源,并发现当TCP的延迟ACK (DA)方案实现时,需要RTOmin来缓解虚假超时。基于这一观察结果,我们提出了一种可部署且与tcp兼容的新型延迟ACK (NDA)来取代传统的DA。我们的解决方案与以前的工作不同之处在于,我们没有使用复杂的算法或细粒度定时器来调优RTOmin,而是对DA方案进行了微小的修改,以允许发送方删除RTOmin约束,同时在接收方保留延迟的ACK函数。在去除RTOmin后,为了消除RTO(重传超时)的攻击性,我们使用编码技术对超时重传的数据包进行编码,使潜在的虚假重传变得有用。仿真结果表明,在有损无线网络中,NDA是高效的,因为它比DA实现了更高的TCP goodput和信道效率。利用NDA获得的增益来自于二阶效应。消除RTOmin约束带来的一个效果是,因为较小的RTO定时器使TCP对超时做出快速反应,从而导致较小的传输空闲。另一个效果来自于通过允许接收方确认每个超时重传来消除连续RTO,这进一步减少了RTO空闲。
{"title":"Efficient new delayed ACK for TCP: old problem, new insight","authors":"Ming Li, Andrey Lukyanenko, S. Tarkoma, Antti Ylä-Jääski","doi":"10.1145/2507924.2507948","DOIUrl":"https://doi.org/10.1145/2507924.2507948","url":null,"abstract":"When a TCP connection experiences a timeout, the sender must wait at least RTOmin (Minimum Retransmission Timeout) before doing the retransmission, during which the channel may be completely idle, undermining the throughput and channel efficiency. In this paper, we investigate the origin of RTOmin and find that it is needed to mitigate against spurious timeouts when the Delayed ACK (DA) scheme for TCP is implemented. Motivated by this observation, we propose a deployable and TCP-compatible new Delayed ACK (NDA) to replace the legacy DA. Our solution differs with previous work is that instead of using complex algorithms or fine-grained timer to tune RTOmin, we modify the DA scheme with minor changes to allow the sender to remove the RTOmin constraint while reserving the delayed ACK function at the receiver. In order to eliminate the aggressiveness of RTO (Retransmission Timeout) after removing RTOmin, we use coding techniques to encode the timeout retransmitted packets to make the potential spurious retransmissions useful. The simulation results demonstrate that in lossy wireless networks, NDA is efficient, because it achieves much higher TCP goodput and channel efficiency compared to DA. The gain we obtain by the use of NDA comes from two-order effects. One effect comes from removing the RTOmin constraint, because small RTO timer makes TCP react quickly to timeouts, resulting in small transmission idle. The other effect comes from eliminating consecutive RTO by allowing the receiver to acknowledge each timeout retransmission, which further reduces the RTO idle.","PeriodicalId":445138,"journal":{"name":"Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123196794","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
On the compound impact of opportunistic scheduling and D2D communications in cellular networks 蜂窝网络中机会调度与D2D通信的复合影响
A. Asadi, V. Mancuso
Opportunistic scheduling was initially proposed to exploit user channel diversity for network capacity enhancement. However, the achievable gain of opportunistic schedulers is generally restrained due to fairness considerations which impose a tradeoff between fairness and throughput. In this paper, we show via analysis and numerical simulations that opportunistic scheduling not only increases network throughput dramatically, but also increases energy efficiency and can be fair to the users when they cooperate, in particular by using D2D communications. We propose to leverage smartphone's dual-radio interface capabilities to form clusters among mobile users. We design simple, scalable and energy-efficient D2D-assisted opportunistic strategies, which would incentivize mobile users to form clusters. We use a coalitional game theory approach to analyze the cluster formation mechanism, and show that proportional fair-based intra-cluster payoff distribution brings significant incentive to all mobile users regardless of their channel quality.
机会调度最初是为了利用用户信道的多样性来增强网络容量而提出的。然而,机会调度器的可实现增益通常受到限制,因为要考虑公平性,这需要在公平性和吞吐量之间进行权衡。在本文中,我们通过分析和数值模拟表明机会调度不仅显著提高了网络吞吐量,而且提高了能源效率,并且在用户合作时对用户是公平的,特别是在使用D2D通信时。我们建议利用智能手机的双无线电接口功能,在移动用户中形成集群。我们设计了简单,可扩展和节能的d2d辅助机会策略,这将激励移动用户形成集群。本文运用联合博弈论方法分析了集群的形成机制,结果表明,基于比例公平的集群内收益分配对所有移动用户都具有显著的激励作用,无论其信道质量如何。
{"title":"On the compound impact of opportunistic scheduling and D2D communications in cellular networks","authors":"A. Asadi, V. Mancuso","doi":"10.1145/2507924.2507929","DOIUrl":"https://doi.org/10.1145/2507924.2507929","url":null,"abstract":"Opportunistic scheduling was initially proposed to exploit user channel diversity for network capacity enhancement. However, the achievable gain of opportunistic schedulers is generally restrained due to fairness considerations which impose a tradeoff between fairness and throughput. In this paper, we show via analysis and numerical simulations that opportunistic scheduling not only increases network throughput dramatically, but also increases energy efficiency and can be fair to the users when they cooperate, in particular by using D2D communications. We propose to leverage smartphone's dual-radio interface capabilities to form clusters among mobile users. We design simple, scalable and energy-efficient D2D-assisted opportunistic strategies, which would incentivize mobile users to form clusters. We use a coalitional game theory approach to analyze the cluster formation mechanism, and show that proportional fair-based intra-cluster payoff distribution brings significant incentive to all mobile users regardless of their channel quality.","PeriodicalId":445138,"journal":{"name":"Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125267721","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: 82
Modelling and analysis of link adaptation for LTE-advanced LTE-advanced链路自适应建模与分析
Parth Amin, S. Iraji, J. Nurminen
We present the detailed system model for adaptive modulation and coding (AMC) in the physical layer, and hybrid automatic repeat request (HARQ) in the data link layer, which play key roles in link layer of future wireless technologies as for e.g. LTE-Advanced. The packet combining schemes hard combining and weighted hard combining are compared in an attempt to reduce packet error rate (PER) and increase spectral efficiency. Simulation results show that both combining schemes will always keep the required quality of service (QoS) and increase spectral efficiency significantly over the system without AMC/HARQ. Moreover, with severe interference, hard combining will improve the system spectral efficiency more than weighted hard combining.
提出了物理层自适应调制和编码(AMC)和数据链路层混合自动重复请求(HARQ)的详细系统模型,它们在LTE-Advanced等未来无线技术的链路层中起着关键作用。为了降低包错误率和提高频谱效率,比较了硬合并和加权硬合并两种包合并方案。仿真结果表明,与没有AMC/HARQ的系统相比,两种组合方案都能保持所需的服务质量(QoS),并显著提高频谱效率。此外,在干扰严重的情况下,硬合并比加权硬合并更能提高系统的频谱效率。
{"title":"Modelling and analysis of link adaptation for LTE-advanced","authors":"Parth Amin, S. Iraji, J. Nurminen","doi":"10.1145/2507924.2507986","DOIUrl":"https://doi.org/10.1145/2507924.2507986","url":null,"abstract":"We present the detailed system model for adaptive modulation and coding (AMC) in the physical layer, and hybrid automatic repeat request (HARQ) in the data link layer, which play key roles in link layer of future wireless technologies as for e.g. LTE-Advanced. The packet combining schemes hard combining and weighted hard combining are compared in an attempt to reduce packet error rate (PER) and increase spectral efficiency. Simulation results show that both combining schemes will always keep the required quality of service (QoS) and increase spectral efficiency significantly over the system without AMC/HARQ. Moreover, with severe interference, hard combining will improve the system spectral efficiency more than weighted hard combining.","PeriodicalId":445138,"journal":{"name":"Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128511921","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
An empirical study of link quality estimation techniques for disconnection detection in WBANs wban断连检测中链路质量估计技术的实证研究
Majid Nabi, M. Geilen, T. Basten
Sensor nodes in many Wireless Body Area Network (WBAN) architectures are supposed to deliver sensed data to a gateway node on the body. To satisfy the data delivery requirements, the network needs to adapt itself to the changes in connection status of the body nodes to the gateway. As a prerequisite, Link Quality Estimation (LQE) needs to be done to detect the connection status of the nodes. The quality of links in WBANs is highly time-varying. The LQE technique should be agile to react fast to such link quality dynamics while avoiding frequent fluctuations to reduce the network adaptation overhead. In this paper, we present an empirical study on using different LQE methods for detecting the connection status of body nodes to the gateway in WBANs. A set of experiments using 16 wireless motes deployed on a body are performed to log the behavior of the wireless links. We explore the trade-offs made by each LQE method in terms of agility, stability, and reliability in detecting connection changes by analyzing the experimental data. Moreover, different LQE methods are used in an adaptive multi-hop WBAN mechanism, as a case study, and their impact on the Quality-of-Services (QoS) are investigated.
在许多无线体域网络(WBAN)体系结构中,传感器节点被要求将感知到的数据传递到体上的网关节点。为了满足数据传输的需求,网络需要适应主体节点与网关连接状态的变化。在此前提下,需要进行链路质量估计(Link Quality Estimation, LQE)来检测节点的连接状态。wban中链路的质量是高度时变的。LQE技术应该是敏捷的,以快速响应这种链路质量动态,同时避免频繁的波动,以减少网络适应开销。在本文中,我们对使用不同的LQE方法检测wban中主体节点与网关的连接状态进行了实证研究。通过在人体上部署16个无线微球,进行了一组实验,以记录无线链路的行为。通过分析实验数据,我们探讨了每种LQE方法在检测连接变化方面的敏捷性、稳定性和可靠性。此外,以自适应多跳WBAN机制为例,研究了不同LQE方法对服务质量(QoS)的影响。
{"title":"An empirical study of link quality estimation techniques for disconnection detection in WBANs","authors":"Majid Nabi, M. Geilen, T. Basten","doi":"10.1145/2507924.2507959","DOIUrl":"https://doi.org/10.1145/2507924.2507959","url":null,"abstract":"Sensor nodes in many Wireless Body Area Network (WBAN) architectures are supposed to deliver sensed data to a gateway node on the body. To satisfy the data delivery requirements, the network needs to adapt itself to the changes in connection status of the body nodes to the gateway. As a prerequisite, Link Quality Estimation (LQE) needs to be done to detect the connection status of the nodes. The quality of links in WBANs is highly time-varying. The LQE technique should be agile to react fast to such link quality dynamics while avoiding frequent fluctuations to reduce the network adaptation overhead. In this paper, we present an empirical study on using different LQE methods for detecting the connection status of body nodes to the gateway in WBANs. A set of experiments using 16 wireless motes deployed on a body are performed to log the behavior of the wireless links. We explore the trade-offs made by each LQE method in terms of agility, stability, and reliability in detecting connection changes by analyzing the experimental data. Moreover, different LQE methods are used in an adaptive multi-hop WBAN mechanism, as a case study, and their impact on the Quality-of-Services (QoS) are investigated.","PeriodicalId":445138,"journal":{"name":"Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128407236","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
Solution of detecting jamming attacks in vehicle ad hoc networks 车辆自组织网络中干扰攻击检测的解决方案
A. Nguyen, L. Mokdad, J. Ben-othman
Vehicular ad hoc network (VANET) is currently researched and achieved by several organizers to develop the intelligent transportation system (ITS). Research on Vehicular Ad hoc Network (VANET) has been conducting for long time. Nowadays, several organizers has obtained remarkable achievements contributing to the development of the Intelligent transportation system, ITS. The communication protocol in VANET named 802.11p protocol, has been improved to adapt to the high-speed environment. However, the communication among vehicles can be interfered even by Denial of Service (DoS) attacks such as jamming attacks. The vehicles communicate with each other in the high-speed environment. The time of data exchange between them must be extremely short. Solutions for detection of jamming attacks must occur quickly to detect more precisely. In order to detect jamming attacks more precisely, solutions therefore must occur very fast. In this paper, we propose one solution to detect jamming attacks. The following solution is based on the combination of the packet delivery ratio and its diminution.
车辆自组织网络(VANET)是目前由几个组织者研究和实现的智能交通系统(ITS)。车载自组织网络(VANET)的研究已经进行了很长时间。如今,一些组织者在智能交通系统ITS的发展中取得了显著的成就。VANET中的通信协议称为802.11p协议,为适应高速环境而进行了改进。然而,车辆之间的通信甚至会受到干扰攻击等拒绝服务攻击的干扰。车辆在高速环境中相互通信。它们之间的数据交换时间必须非常短。检测干扰攻击的解决方案必须快速发生,以便更精确地检测。因此,为了更精确地检测干扰攻击,解决方案必须非常快地出现。本文提出了一种检测干扰攻击的解决方案。下面的解决方案是基于分组分发率和其递减的组合。
{"title":"Solution of detecting jamming attacks in vehicle ad hoc networks","authors":"A. Nguyen, L. Mokdad, J. Ben-othman","doi":"10.1145/2507924.2507927","DOIUrl":"https://doi.org/10.1145/2507924.2507927","url":null,"abstract":"Vehicular ad hoc network (VANET) is currently researched and achieved by several organizers to develop the intelligent transportation system (ITS). Research on Vehicular Ad hoc Network (VANET) has been conducting for long time. Nowadays, several organizers has obtained remarkable achievements contributing to the development of the Intelligent transportation system, ITS. The communication protocol in VANET named 802.11p protocol, has been improved to adapt to the high-speed environment. However, the communication among vehicles can be interfered even by Denial of Service (DoS) attacks such as jamming attacks. The vehicles communicate with each other in the high-speed environment. The time of data exchange between them must be extremely short. Solutions for detection of jamming attacks must occur quickly to detect more precisely. In order to detect jamming attacks more precisely, solutions therefore must occur very fast. In this paper, we propose one solution to detect jamming attacks. The following solution is based on the combination of the packet delivery ratio and its diminution.","PeriodicalId":445138,"journal":{"name":"Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127787022","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: 25
Channel fading impact on multi-hop DSRC safety communication 信道衰落对多跳DSRC安全通信的影响
Xiaoyan Yin, Xiaomin Ma, Kishor S. Trivedi
In this paper, we propose an accurate and efficient analytic model to evaluate the impact of channel fading on multi-hop safety message disseminations in vehicular ad hoc networks (VANET). A multi-hop relay strategy is also proposed by setting distance-based timers (the longer the distance, the shorter the timer) so that the farther receiver has the higher priority for it to rebroadcast the message. Important performance and reliability metrics are derived and analyzed for a thorough understanding of the safety message transmission behavior. Extensive simulations are conducted in Matlab to verify the correctness of our proposed model under realistic network parameter settings.
在本文中,我们提出了一个准确有效的分析模型来评估信道衰落对车载自组织网络(VANET)中多跳安全消息传播的影响。通过设置基于距离的定时器(距离越长,定时器越短),提出了一种多跳中继策略,使更远的接收方具有更高的重播优先级。推导并分析了重要的性能和可靠性指标,以便全面了解安全消息传输行为。在Matlab中进行了大量的仿真,以验证我们提出的模型在实际网络参数设置下的正确性。
{"title":"Channel fading impact on multi-hop DSRC safety communication","authors":"Xiaoyan Yin, Xiaomin Ma, Kishor S. Trivedi","doi":"10.1145/2507924.2507989","DOIUrl":"https://doi.org/10.1145/2507924.2507989","url":null,"abstract":"In this paper, we propose an accurate and efficient analytic model to evaluate the impact of channel fading on multi-hop safety message disseminations in vehicular ad hoc networks (VANET). A multi-hop relay strategy is also proposed by setting distance-based timers (the longer the distance, the shorter the timer) so that the farther receiver has the higher priority for it to rebroadcast the message. Important performance and reliability metrics are derived and analyzed for a thorough understanding of the safety message transmission behavior. Extensive simulations are conducted in Matlab to verify the correctness of our proposed model under realistic network parameter settings.","PeriodicalId":445138,"journal":{"name":"Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems","volume":"2003 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127692184","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
Multiple-access channel capacity of diffusion and ligand-based molecular communication 扩散和基于配体的分子通信的多址通道容量
Qiang Liu, Kun Yang
Molecular communication is a novel paradigm that uses molecules as an information carrier to enable nanomachines to communicate with each other. The two major components of a diffusion-based molecular communication are diffusion in the medium and the ligand-reception. In this paper, using the principles of diffusion theories and natural ligand-receptor binding mechanisms in biology, we first develop and present model for the molecular single-access channel. Then, we derive the capacity expressions of the molecular single-access channel. Furthermore, we extend it to multiple-access channel in which multiple transmitters communicate with a single receiver. The objective of this paper is to study the capacity of multiple-access channel which is effected by the parameters of diffusion channel and ligand-receptor binding mechanisms. The numerical results show that the overall channel capacity is restricted by the physical parameters of diffusion channel and ligand-receptors and some different characteristics are presented in multiple-access channel scenario comparing with single-access channel scenario.
分子通信是一种利用分子作为信息载体使纳米机器相互通信的新范式。基于扩散的分子通信的两个主要组成部分是介质中的扩散和配体接收。本文利用生物学中扩散理论和自然配体-受体结合机制的原理,首次建立并提出了分子单通道模型。然后,我们推导了分子单通道的容量表达式。此外,我们将其扩展到多个发射器与单个接收器通信的多址信道。本文的目的是研究扩散通道参数和配体-受体结合机制对多通道容量的影响。数值计算结果表明,扩散通道和配体受体的物理参数限制了通道的总容量,并且在多通道情况下与单通道情况下表现出一些不同的特性。
{"title":"Multiple-access channel capacity of diffusion and ligand-based molecular communication","authors":"Qiang Liu, Kun Yang","doi":"10.1145/2507924.2507932","DOIUrl":"https://doi.org/10.1145/2507924.2507932","url":null,"abstract":"Molecular communication is a novel paradigm that uses molecules as an information carrier to enable nanomachines to communicate with each other. The two major components of a diffusion-based molecular communication are diffusion in the medium and the ligand-reception. In this paper, using the principles of diffusion theories and natural ligand-receptor binding mechanisms in biology, we first develop and present model for the molecular single-access channel. Then, we derive the capacity expressions of the molecular single-access channel. Furthermore, we extend it to multiple-access channel in which multiple transmitters communicate with a single receiver. The objective of this paper is to study the capacity of multiple-access channel which is effected by the parameters of diffusion channel and ligand-receptor binding mechanisms. The numerical results show that the overall channel capacity is restricted by the physical parameters of diffusion channel and ligand-receptors and some different characteristics are presented in multiple-access channel scenario comparing with single-access channel scenario.","PeriodicalId":445138,"journal":{"name":"Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems","volume":"90 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129819794","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
Traffic aware video dissemination over vehicular ad hoc networks 基于车辆自组织网络的交通感知视频传播
Guilherme Maia, C. Rezende, L. Villas, A. Boukerche, A. C. Viana, Andre L. L. Aquino, A. Loureiro
Video dissemination to a group of vehicles is one of the many fundamental services envisioned for Vehicular Ad hoc Networks. For this purpose, in this paper we describe VoV, a video dissemination protocol that operates under extreme traffic conditions. Contrary to most existing approaches that focus exclusively on always-connected networks and tackle the broadcast storm problem inherent to them, VoV is designed to operate under any kind of traffic condition. We propose a new geographic-based broadcast suppression mechanism that gives higher priority to broadcast to vehicles inside especial forwarding zones. Furthermore, vehicles store and carry received messages in a local buffer in order to forward them to vehicles that were not covered by the first dissemination process, probably as a result of collisions or intermittent disconnections. Finally, VoV employs a rate control mechanism that sets the pace at which messages must be transmitted in an attempt to avoid channel overloading and to overcome the synchronization effects introduced by the channel hopping mechanism employed by IEEE 802.11p. When compared to two well-known solutions -- UV-CAST and AID -- we show that our proposal is more efficient in terms of message delivery, delay and overhead.
向一组车辆传播视频是车载自组织网络设想的许多基本服务之一。为此,在本文中,我们描述了VoV,一个在极端交通条件下运行的视频传播协议。与大多数专注于始终连接的网络并解决其固有的广播风暴问题的现有方法相反,VoV旨在在任何类型的流量条件下运行。我们提出了一种新的基于地理的广播抑制机制,该机制赋予特定转发区域内车辆更高的广播优先权。此外,车辆在本地缓冲区中存储和携带接收到的信息,以便将它们转发给可能由于碰撞或间歇性断开连接而未被第一次传播过程覆盖的车辆。最后,VoV采用了一种速率控制机制,该机制设置了消息必须传输的速度,以避免信道过载,并克服IEEE 802.11p采用的信道跳变机制带来的同步效应。当与两种众所周知的解决方案(UV-CAST和AID)进行比较时,我们发现我们的建议在消息传递、延迟和开销方面更有效。
{"title":"Traffic aware video dissemination over vehicular ad hoc networks","authors":"Guilherme Maia, C. Rezende, L. Villas, A. Boukerche, A. C. Viana, Andre L. L. Aquino, A. Loureiro","doi":"10.1145/2507924.2507962","DOIUrl":"https://doi.org/10.1145/2507924.2507962","url":null,"abstract":"Video dissemination to a group of vehicles is one of the many fundamental services envisioned for Vehicular Ad hoc Networks. For this purpose, in this paper we describe VoV, a video dissemination protocol that operates under extreme traffic conditions. Contrary to most existing approaches that focus exclusively on always-connected networks and tackle the broadcast storm problem inherent to them, VoV is designed to operate under any kind of traffic condition. We propose a new geographic-based broadcast suppression mechanism that gives higher priority to broadcast to vehicles inside especial forwarding zones. Furthermore, vehicles store and carry received messages in a local buffer in order to forward them to vehicles that were not covered by the first dissemination process, probably as a result of collisions or intermittent disconnections. Finally, VoV employs a rate control mechanism that sets the pace at which messages must be transmitted in an attempt to avoid channel overloading and to overcome the synchronization effects introduced by the channel hopping mechanism employed by IEEE 802.11p. When compared to two well-known solutions -- UV-CAST and AID -- we show that our proposal is more efficient in terms of message delivery, delay and overhead.","PeriodicalId":445138,"journal":{"name":"Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113941282","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: 28
Assessing the appropriateness of using markov decision processes for RF spectrum management 评估在射频频谱管理中使用马尔可夫决策过程的适当性
J. Meier, Benjamin Karaus, S. Sistla, T. Tidwell, R. Chamberlain, C. Gill
The stochastic nature of wireless communication suggests a Markov Decision Process (MDP) as a formalism for identifying and evaluating spectrum control policies. However, in practice numerous factors influence the success or failure of a transmission, so that the applicability of particular MDP models to real spectrum management problems must itself be examined. This paper presents a series of model validation studies in which correspondence between an MDP model and a discrete-event simulation (DES) model is evaluated. We test several hypotheses that together provide a foundation and an exemplar for the idea of using MDPs to guide management of shared spectrum. We conclude that there is sufficient similarity between the performance predictions made by the MDP model and the DES model that MDPs can be used effectively to determine spectrum control policies.
无线通信的随机特性建议将马尔可夫决策过程(MDP)作为识别和评估频谱控制策略的形式化方法。然而,在实践中,有许多因素会影响传输的成功或失败,因此必须检查特定MDP模型对实际频谱管理问题的适用性。本文提出了一系列模型验证研究,其中MDP模型和离散事件模拟(DES)模型之间的对应关系进行了评估。我们测试了几个假设,它们共同为使用mdp指导共享频谱管理的想法提供了基础和范例。我们得出结论,MDP模型和DES模型所做的性能预测之间有足够的相似性,MDP可以有效地用于确定频谱控制策略。
{"title":"Assessing the appropriateness of using markov decision processes for RF spectrum management","authors":"J. Meier, Benjamin Karaus, S. Sistla, T. Tidwell, R. Chamberlain, C. Gill","doi":"10.1145/2507924.2507942","DOIUrl":"https://doi.org/10.1145/2507924.2507942","url":null,"abstract":"The stochastic nature of wireless communication suggests a Markov Decision Process (MDP) as a formalism for identifying and evaluating spectrum control policies. However, in practice numerous factors influence the success or failure of a transmission, so that the applicability of particular MDP models to real spectrum management problems must itself be examined. This paper presents a series of model validation studies in which correspondence between an MDP model and a discrete-event simulation (DES) model is evaluated. We test several hypotheses that together provide a foundation and an exemplar for the idea of using MDPs to guide management of shared spectrum. We conclude that there is sufficient similarity between the performance predictions made by the MDP model and the DES model that MDPs can be used effectively to determine spectrum control policies.","PeriodicalId":445138,"journal":{"name":"Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116782365","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
Experimental evaluation of a wireless community mesh network 一种无线社区网状网络的实验评估
Llorenç Cerdà-Alabern, Axel Neumann, P. Garcia
Nowadays there are inexpensive WiFi devices that have fostered the deployment of wireless communities. Well known routing protocols used in the Internet do not fit well to time varying characteristic of wireless networks. This has motivated an intensive research on routing protocols for wireless mesh networks. At this time there are a number of mature and stable implementations that are being deployed in production networks. In this paper we focus on the experimental evaluation of a production Wireless Mesh network being deployed in a testbed at Universitat Politècnica de Catalunya (UPC) and a quarter of the city of Barcelona, Spain. To our best knowledge, this is the first paper where a production community wireless network using 802.11an is analyzed.
如今,廉价的WiFi设备促进了无线社区的部署。Internet中常用的路由协议不能很好地适应无线网络的时变特性。这激发了对无线网状网络路由协议的深入研究。此时,有许多成熟和稳定的实现正在生产网络中部署。在本文中,我们重点研究了在加泰罗尼亚政治大学(UPC)和西班牙巴塞罗那市四分之一的试验台部署的生产无线Mesh网络的实验评估。据我们所知,这是第一篇分析使用802.11an的生产社区无线网络的论文。
{"title":"Experimental evaluation of a wireless community mesh network","authors":"Llorenç Cerdà-Alabern, Axel Neumann, P. Garcia","doi":"10.1145/2507924.2507960","DOIUrl":"https://doi.org/10.1145/2507924.2507960","url":null,"abstract":"Nowadays there are inexpensive WiFi devices that have fostered the deployment of wireless communities. Well known routing protocols used in the Internet do not fit well to time varying characteristic of wireless networks. This has motivated an intensive research on routing protocols for wireless mesh networks. At this time there are a number of mature and stable implementations that are being deployed in production networks. In this paper we focus on the experimental evaluation of a production Wireless Mesh network being deployed in a testbed at Universitat Politècnica de Catalunya (UPC) and a quarter of the city of Barcelona, Spain. To our best knowledge, this is the first paper where a production community wireless network using 802.11an is analyzed.","PeriodicalId":445138,"journal":{"name":"Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126482372","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: 47
期刊
Proceedings of the 16th ACM international conference on Modeling, analysis & simulation of wireless and mobile systems
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1