首页 > 最新文献

2011 18th International Conference on Telecommunications最新文献

英文 中文
MAMA: Multi-applicationmiddleware for efficient wireless sensor networks MAMA:用于高效无线传感器网络的多应用中间件
Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898918
Philipp M. Glatz, L. Hörmann, C. Steger, R. Weiss
Wireless sensor network (WSN) motes are resource constrained devices. This is due to optimizations tailoring them towards application-specific and cost-efficient scenarios and setups. Many to most of these optimizations are built upon power aware aspects and dependability measures due to the fact that battery technology still evolves quite slowly and WSN's inherent redundancy is suitable for fault-tolerant schemes. What we do here is implementing a programming paradigm where several applications may be distributed heterogeneously among different subsets of a WSN's motes. Multiple applications can be run side by side on the same mote. This is far more efficient than deploying hardware for each and every application. The Multi-Application Mid-dlewAre (MAMA) layer allows running different TinyOS applications at the same time easily. Concurrent sensor usage and messaging is handled by MAMA. Results from simulation runs, hardware deployments, power profiling and scope measurements show good scalability, only little timing and memory overhead and power efficient properties.
无线传感器网络(WSN)是一种资源受限的设备。这是由于针对特定于应用程序且具有成本效益的场景和设置进行了优化。由于电池技术的发展仍然相当缓慢,并且WSN固有的冗余适合容错方案,因此这些优化中的许多或大多数都是建立在功率感知方面和可靠性措施之上的。我们在这里所做的是实现一个编程范例,其中几个应用程序可以在WSN的不同子集之间异构地分布。多个应用程序可以在同一台设备上并行运行。这比为每个应用程序部署硬件要高效得多。多应用中间件(MAMA)层允许同时轻松运行不同的TinyOS应用程序。并发传感器使用和消息传递由MAMA处理。仿真运行、硬件部署、功耗分析和范围测量的结果显示出良好的可扩展性,只有很少的时间和内存开销以及节能特性。
{"title":"MAMA: Multi-applicationmiddleware for efficient wireless sensor networks","authors":"Philipp M. Glatz, L. Hörmann, C. Steger, R. Weiss","doi":"10.1109/CTS.2011.5898918","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898918","url":null,"abstract":"Wireless sensor network (WSN) motes are resource constrained devices. This is due to optimizations tailoring them towards application-specific and cost-efficient scenarios and setups. Many to most of these optimizations are built upon power aware aspects and dependability measures due to the fact that battery technology still evolves quite slowly and WSN's inherent redundancy is suitable for fault-tolerant schemes. What we do here is implementing a programming paradigm where several applications may be distributed heterogeneously among different subsets of a WSN's motes. Multiple applications can be run side by side on the same mote. This is far more efficient than deploying hardware for each and every application. The Multi-Application Mid-dlewAre (MAMA) layer allows running different TinyOS applications at the same time easily. Concurrent sensor usage and messaging is handled by MAMA. Results from simulation runs, hardware deployments, power profiling and scope measurements show good scalability, only little timing and memory overhead and power efficient properties.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117269864","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
Fault diagnosis in network virtualization environment 网络虚拟化环境中的故障诊断
Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898980
YaDung. Pan, Xue-song Qiu, Shun-li Zhang
Virtual networks have emerged as a powerful and flexible platform for future network. The dependability of virtual services relies on the network's capabilities to effectively diagnose and recover faults. But the flexible characteristics of virtual networks bring to virtualization fault diagnosis new challenges, such as network scalability, inaccessible substrate network fault information, incomplete and inaccurate network observations, dynamic symptom-fault causality relationships, and multi-layer complexity. To tackle with these challenges, the paper proposes a virtual network fault diagnosis framework (called VNFD). VNFD can use observed end-to-end symptoms reported by monitoring systems to get a set of potential faulty components for evaluating their fault likelihood, and select the most likely faulty hypothesis set to explain all the observed symptoms. VNFD can locate root causes without relying on substrate network fault probabilistic quantification (e.g. prior fault probability). Simulations and experimental studies show that VNFD can efficiently and accurately get a hypothesis set explaining all the observed symptoms, even when the symptoms are incomplete and inaccurate.
虚拟网络已经成为未来网络的一个强大而灵活的平台。虚拟业务的可靠性依赖于网络有效诊断和恢复故障的能力。但虚拟网络的灵活特性给虚拟化故障诊断带来了网络可扩展性、底层网络故障信息不可获取、网络观测不完整不准确、症状-故障因果关系动态化、多层复杂性等新的挑战。为了解决这些问题,本文提出了一个虚拟网络故障诊断框架(VNFD)。VNFD可以使用监测系统报告的观察到的端到端症状来获得一组潜在故障组件,以评估其故障可能性,并选择最可能的故障假设集来解释所有观察到的症状。VNFD可以定位根本原因,而不依赖于基板网络故障概率量化(如先验故障概率)。仿真和实验研究表明,VNFD可以高效、准确地得到一个假设集来解释所有观察到的症状,即使这些症状是不完整和不准确的。
{"title":"Fault diagnosis in network virtualization environment","authors":"YaDung. Pan, Xue-song Qiu, Shun-li Zhang","doi":"10.1109/CTS.2011.5898980","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898980","url":null,"abstract":"Virtual networks have emerged as a powerful and flexible platform for future network. The dependability of virtual services relies on the network's capabilities to effectively diagnose and recover faults. But the flexible characteristics of virtual networks bring to virtualization fault diagnosis new challenges, such as network scalability, inaccessible substrate network fault information, incomplete and inaccurate network observations, dynamic symptom-fault causality relationships, and multi-layer complexity. To tackle with these challenges, the paper proposes a virtual network fault diagnosis framework (called VNFD). VNFD can use observed end-to-end symptoms reported by monitoring systems to get a set of potential faulty components for evaluating their fault likelihood, and select the most likely faulty hypothesis set to explain all the observed symptoms. VNFD can locate root causes without relying on substrate network fault probabilistic quantification (e.g. prior fault probability). Simulations and experimental studies show that VNFD can efficiently and accurately get a hypothesis set explaining all the observed symptoms, even when the symptoms are incomplete and inaccurate.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121116624","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: 7
Uplink interference alignment for OFDM systems OFDM系统的上行干扰对准
Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898992
M. Kheirabadi, Alireza Ghiamatioun, S. Nader-Esfahani
This paper focuses on the uplink transmission in a cellular system in which the channels in two neighboring cells are modeled as two mutually interfering multiple access channels (2-IMAC). The base stations (BSs) are equipped with multiple antennas while each user has only one antenna and K users are active in each cell. By increasing the number of users, it is shown in [1] that for single-antenna BSs, using interference alignment, each cell can approach the interference-free degrees of freedom (DOF) provided that the bandwidth is sufficiently large. But as the number of users grows, the correlation between adjacent subcarriers increases and this degrades the performance of interference alignment. The proposed scheme incorporates the concept of cyclic delay diversity (CDD) to reduce the correlation among subcarriers with the help of multiple antennas at the BSs. Simulation results show the performance improvement of the proposed scheme.
本文主要研究两个相邻小区中的信道被建模为两个相互干扰的多址信道(2-IMAC)的小区系统中的上行传输。基站(BSs)配备了多个天线,而每个用户只有一个天线,每个小区有K个活跃用户。通过增加用户数量,如图[1]所示,对于单天线BSs,使用干扰对准,只要带宽足够大,每个小区都可以接近无干扰自由度(DOF)。但是随着用户数量的增加,相邻子载波之间的相关性增加,这会降低干扰对准的性能。该方案结合了循环延迟分集(CDD)的概念,通过在BSs处使用多天线来降低子载波之间的相关性。仿真结果表明了该方案的性能改善。
{"title":"Uplink interference alignment for OFDM systems","authors":"M. Kheirabadi, Alireza Ghiamatioun, S. Nader-Esfahani","doi":"10.1109/CTS.2011.5898992","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898992","url":null,"abstract":"This paper focuses on the uplink transmission in a cellular system in which the channels in two neighboring cells are modeled as two mutually interfering multiple access channels (2-IMAC). The base stations (BSs) are equipped with multiple antennas while each user has only one antenna and K users are active in each cell. By increasing the number of users, it is shown in [1] that for single-antenna BSs, using interference alignment, each cell can approach the interference-free degrees of freedom (DOF) provided that the bandwidth is sufficiently large. But as the number of users grows, the correlation between adjacent subcarriers increases and this degrades the performance of interference alignment. The proposed scheme incorporates the concept of cyclic delay diversity (CDD) to reduce the correlation among subcarriers with the help of multiple antennas at the BSs. Simulation results show the performance improvement of the proposed scheme.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124726823","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
A signal strength based medium access control for OFDMA based wireless ad hoc networks 基于信号强度的OFDMA无线自组织网络介质访问控制
Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898965
H. Xiong, E. Bodanese
Orthogonal Frequency Division Multiple Access (OFDMA) has been used as a multiple access scheme in many infrastructure based wireless networks, such as IEEE 802.16, 3GPP LTE etc. because of its prominent features. Interestingly, there are only a few proposals on implementing OFDMA in mobile ad hoc networks. In this paper, a Signal-Strength based Medium Access Protocol (SSMAP) is proposed to orchestrate the channel access in OFDMA based mobile ad hoc networks. SSMAP introduces a sub-channel selection criterion which is based on the interference power of the subchannels in the receiver side aiming to reduce the co-channel interference and reduce the signaling overhead. The proposed sub-channel allocation scheme is fully distributed and each node does not need to exchange periodic update information with its neighbors. The simulation results illustrate the major performance advantages of SSMAP compared to prior channel access protocols, such as signal-radio multi-channel and multi-radio multi-channel in wireless ad hoc networks.
正交频分多址(OFDMA)由于其突出的特点,在许多基于基础设施的无线网络中被用作多址方案,如IEEE 802.16、3GPP LTE等。有趣的是,关于在移动自组织网络中实现OFDMA的建议很少。本文提出了一种基于信号强度的介质访问协议(SSMAP),用于协调基于OFDMA的移动自组织网络中的信道访问。SSMAP引入了一种基于接收端子信道干扰功率的子信道选择准则,旨在减少同信道干扰,降低信令开销。提出的子信道分配方案是完全分布式的,每个节点不需要与相邻节点交换周期性的更新信息。仿真结果表明,与无线自组织网络中的信号-无线电多通道和多无线电多通道等现有信道接入协议相比,SSMAP具有主要的性能优势。
{"title":"A signal strength based medium access control for OFDMA based wireless ad hoc networks","authors":"H. Xiong, E. Bodanese","doi":"10.1109/CTS.2011.5898965","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898965","url":null,"abstract":"Orthogonal Frequency Division Multiple Access (OFDMA) has been used as a multiple access scheme in many infrastructure based wireless networks, such as IEEE 802.16, 3GPP LTE etc. because of its prominent features. Interestingly, there are only a few proposals on implementing OFDMA in mobile ad hoc networks. In this paper, a Signal-Strength based Medium Access Protocol (SSMAP) is proposed to orchestrate the channel access in OFDMA based mobile ad hoc networks. SSMAP introduces a sub-channel selection criterion which is based on the interference power of the subchannels in the receiver side aiming to reduce the co-channel interference and reduce the signaling overhead. The proposed sub-channel allocation scheme is fully distributed and each node does not need to exchange periodic update information with its neighbors. The simulation results illustrate the major performance advantages of SSMAP compared to prior channel access protocols, such as signal-radio multi-channel and multi-radio multi-channel in wireless ad hoc networks.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"37 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124843393","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
Optimum detection of Walsh-Hadamard multiplexed antipodal signals over Rayleigh fading channels 瑞利衰落信道上沃尔什-阿达玛多路对映信号的最佳检测
Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898936
A. Iossifides
This paper proposes and analyzes a maximum aposteriori probability (MAP) coherent detector for Walsh-Hadamard multiplexed binary antipodal signals, based on vector detection at the code-length size of the Walsh-Hadamard codes. Tight bounds on the bit error probability that are analytically derived or numerically computed, together with simulation results, show significant performance gain over symbol-by-symbol MAP detection for either one-dimensional or two-dimensional system configurations that lead to pulse amplitude modulation (PAM) and quadrature amplitude modulation (QAM) rectangular constellations, respectively. In addition, the proposed system with MAP vector detection, presents great performance enhancement compared to standard binary phase shift keying (BPSK) modulation under identical information bit rate and mean power constraints, at a cost of higher instant power and moderate detection complexity.
本文提出并分析了一种基于Walsh-Hadamard码长大小的矢量检测的Walsh-Hadamard复用二进制对足信号的最大后验概率(MAP)相干检测器。通过解析推导或数值计算得出的误码概率的严格范围,与仿真结果一起显示,对于一维或二维系统配置,分别导致脉冲幅度调制(PAM)和正交幅度调制(QAM)矩形星座的逐符号MAP检测,都可以获得显着的性能增益。此外,在相同的信息比特率和平均功率约束下,与标准二进制相移键控(BPSK)调制相比,采用MAP矢量检测的系统性能有很大提高,但代价是更高的瞬时功率和中等的检测复杂度。
{"title":"Optimum detection of Walsh-Hadamard multiplexed antipodal signals over Rayleigh fading channels","authors":"A. Iossifides","doi":"10.1109/CTS.2011.5898936","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898936","url":null,"abstract":"This paper proposes and analyzes a maximum aposteriori probability (MAP) coherent detector for Walsh-Hadamard multiplexed binary antipodal signals, based on vector detection at the code-length size of the Walsh-Hadamard codes. Tight bounds on the bit error probability that are analytically derived or numerically computed, together with simulation results, show significant performance gain over symbol-by-symbol MAP detection for either one-dimensional or two-dimensional system configurations that lead to pulse amplitude modulation (PAM) and quadrature amplitude modulation (QAM) rectangular constellations, respectively. In addition, the proposed system with MAP vector detection, presents great performance enhancement compared to standard binary phase shift keying (BPSK) modulation under identical information bit rate and mean power constraints, at a cost of higher instant power and moderate detection complexity.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116053432","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
Target location based sink positioning in wireless sensor networks 无线传感器网络中基于目标位置的汇聚定位
Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898923
Dimitrios Zorbas, C. Douligeris, V. Fodor
One of the main challenges in wireless sensor networks is to prolong the network lifetime by efficiently handling the limited battery life of the nodes. This problem becomes harder in applications where the nodes are randomly dropped in the field. In this paper we deal with the problem of the sink placement and of the network longevity, assuming a number of points in the field with known positions which must be covered by the sensors. Unlike other approaches, we consider the more realistic scenario where the coordinates of the sensors are not assumed to be known in advance and, thus, they cannot be used for the computation of the positions of the sinks. We present two solutions for the above problem; one based on the distance between the points and the second on the probability that a sensor may cover many points. We evaluate our approaches and compare them to algorithms that use the knowledge of the positions of the sensors in order to compute likely sink locations. It is shown that both proposed approaches present similar or better performance concerning network lifetime, while at the same time they significantly decrease the algorithm complexity.
无线传感器网络面临的主要挑战之一是通过有效地处理节点有限的电池寿命来延长网络寿命。在节点在字段中被随机丢弃的应用程序中,这个问题变得更加困难。在本文中,我们处理了接收器放置和网络寿命的问题,假设现场有许多已知位置的点,这些点必须由传感器覆盖。与其他方法不同的是,我们考虑了更现实的情况,即传感器的坐标不被假设为事先已知,因此,它们不能用于计算水槽的位置。针对上述问题,我们提出了两种解决方案;一种基于点之间的距离,另一种基于传感器可能覆盖多个点的概率。我们评估了我们的方法,并将它们与使用传感器位置知识的算法进行比较,以便计算可能的接收器位置。结果表明,两种方法在网络生存期方面具有相似或更好的性能,同时显著降低了算法复杂度。
{"title":"Target location based sink positioning in wireless sensor networks","authors":"Dimitrios Zorbas, C. Douligeris, V. Fodor","doi":"10.1109/CTS.2011.5898923","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898923","url":null,"abstract":"One of the main challenges in wireless sensor networks is to prolong the network lifetime by efficiently handling the limited battery life of the nodes. This problem becomes harder in applications where the nodes are randomly dropped in the field. In this paper we deal with the problem of the sink placement and of the network longevity, assuming a number of points in the field with known positions which must be covered by the sensors. Unlike other approaches, we consider the more realistic scenario where the coordinates of the sensors are not assumed to be known in advance and, thus, they cannot be used for the computation of the positions of the sinks. We present two solutions for the above problem; one based on the distance between the points and the second on the probability that a sensor may cover many points. We evaluate our approaches and compare them to algorithms that use the knowledge of the positions of the sensors in order to compute likely sink locations. It is shown that both proposed approaches present similar or better performance concerning network lifetime, while at the same time they significantly decrease the algorithm complexity.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122879393","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
Sparse partial optical Code and Wavelength Conversion architecture in hybrid WDM/OCDM OBS networks WDM/OCDM混合OBS网络中的稀疏部分光编码和波长转换体系
Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898921
L. Galdino, José Maranhão Neto, M. Furtado, E. Moschim, L. H. Bonani, F. Durand
The performance of Optical Code/Wavelength Conversion (OCWC) switch architectures are investigated in this work. We employed hybrid technologies within in Optical Burst Switching (OBS) networks, which include wavelength and optical code division multiplexing. The simulated results demonstrate the concomitant increase of optical codes per wavelength and the utilization of Sparse Partial Optical Code/Wavelength Conversion. Both lead to a considerable decrease of the Burst Blocking Probability (BBP). In addition, such hybrid approach also improves the utilization of network resources.
本文研究了光码/波长转换(OCWC)开关结构的性能。我们在光突发交换(OBS)网络中采用混合技术,包括波长和光码分复用。仿真结果表明,每波长光码数的增加和稀疏部分光码/波长转换的利用是同步的。两者都能显著降低突发阻塞概率(BBP)。此外,这种混合方式也提高了网络资源的利用率。
{"title":"Sparse partial optical Code and Wavelength Conversion architecture in hybrid WDM/OCDM OBS networks","authors":"L. Galdino, José Maranhão Neto, M. Furtado, E. Moschim, L. H. Bonani, F. Durand","doi":"10.1109/CTS.2011.5898921","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898921","url":null,"abstract":"The performance of Optical Code/Wavelength Conversion (OCWC) switch architectures are investigated in this work. We employed hybrid technologies within in Optical Burst Switching (OBS) networks, which include wavelength and optical code division multiplexing. The simulated results demonstrate the concomitant increase of optical codes per wavelength and the utilization of Sparse Partial Optical Code/Wavelength Conversion. Both lead to a considerable decrease of the Burst Blocking Probability (BBP). In addition, such hybrid approach also improves the utilization of network resources.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123198131","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
Resource competition at the NGN core network: An ecologically inspired analysis NGN核心网的资源竞争:生态学启发的分析
Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898988
K. Munasinghe, F. Javadi, A. Jamalipour
Multiple traffic flows generated by multiservice applications converge at the core of the Next Generation Network (NGN). Therefore, various admission control techniques are implemented at the NGN core for ensuring that the admittance of a new flow in a resource constrained network does not unfairly disadvantage the performance of other ongoing flows. Regardless of the admission control scheme used, as the resource availability diminishes with time, a competition among the newly arriving flows with various resource consumption levels and characteristics become inevitable. As in the case of any competition, there will be negative effects, which one flow has upon another by consuming or withholding access to a resource that is limited in availability. In this paper, the phenomenon of resource competition at the core of the NGN is explored. Under this study, the NGN is considered as an ecosystem with finite resources, which comprises of heterogeneous access networks. Despite the presence of an admission control mechanism, we argue that in a competitive environment, over a period of time, certain flows corresponding to certain service classes will unfairly overwhelm the others. Analytical proof and simulation results are provided for supporting the above argument.
在NGN (Next Generation Network)的核心,多种业务应用产生的多种业务流将汇合在一起。因此,在NGN核心中实现了各种准入控制技术,以确保资源受限网络中新流的准入不会不公地损害其他正在进行的流的性能。无论采用何种准入控制方案,由于资源可用性随着时间的推移而减少,具有不同资源消耗水平和特征的新到达流量之间的竞争不可避免。在任何竞争的情况下,都会有负面影响,一个流通过消耗或拒绝访问可用性有限的资源而对另一个流产生负面影响。本文探讨了下一代网络核心的资源竞争现象。在本研究中,下一代网络被认为是一个资源有限的生态系统,它由异构接入网络组成。尽管存在准入控制机制,但我们认为,在竞争环境中,在一段时间内,与某些服务类别对应的某些流将不公平地压倒其他流。文中给出了分析证明和仿真结果。
{"title":"Resource competition at the NGN core network: An ecologically inspired analysis","authors":"K. Munasinghe, F. Javadi, A. Jamalipour","doi":"10.1109/CTS.2011.5898988","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898988","url":null,"abstract":"Multiple traffic flows generated by multiservice applications converge at the core of the Next Generation Network (NGN). Therefore, various admission control techniques are implemented at the NGN core for ensuring that the admittance of a new flow in a resource constrained network does not unfairly disadvantage the performance of other ongoing flows. Regardless of the admission control scheme used, as the resource availability diminishes with time, a competition among the newly arriving flows with various resource consumption levels and characteristics become inevitable. As in the case of any competition, there will be negative effects, which one flow has upon another by consuming or withholding access to a resource that is limited in availability. In this paper, the phenomenon of resource competition at the core of the NGN is explored. Under this study, the NGN is considered as an ecosystem with finite resources, which comprises of heterogeneous access networks. Despite the presence of an admission control mechanism, we argue that in a competitive environment, over a period of time, certain flows corresponding to certain service classes will unfairly overwhelm the others. Analytical proof and simulation results are provided for supporting the above argument.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126569070","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: 4
Spatio-temporal measurement and model for number of occupied channels 信道占用数的时空测量与模型
Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898947
K. Qaraqe, Nariman Rahimian, H. Çelebi, C. Georghiades
Cognitive Radio (CR) systems are a promising solution to the spectrum scarcity problem. However, accurate modeling of spectrum utilization is essential to obtain a better quantitative understanding of important concepts of CR systems. Compact mathematical formulations that describe the realistic spectrum usage would improve the recent theoretical work to a large extent. The data generated from such models would also increase the quality of the simulation based research in the aspect of realism. Besides, in practice, measurement campaigns would prefer if they could characterize results with a few well known parameters instead of exchanging large amount of data. Therefore, in this paper we try to come up with a mathematical model for the spectrum usage by estimating the Probability Mass Function (PMF) of the number of occupied channels. Note that this also gives an insight regarding the spectrum availability. To do this, the data collected from a spectrum occupancy measurement campaign conducted in the State of Qatar is used. The measurements are performed over three consecutive days considering 700–3000 MHz frequency band at four different locations concurrently. We show that after applying the Chi square test, the Log-Normal distribution fits the best among other candidates to the empirical PMF independent of location and the threshold used to define a channel as occupied.
认知无线电(CR)系统是解决频谱短缺问题的一种很有前途的方法。然而,频谱利用的精确建模对于更好地定量理解CR系统的重要概念至关重要。描述实际频谱使用的紧凑数学公式将在很大程度上改进最近的理论工作。这些模型所产生的数据也将在真实感方面提高基于仿真的研究质量。此外,在实践中,测量活动更愿意使用几个众所周知的参数来描述结果,而不是交换大量的数据。因此,在本文中,我们试图通过估计占用信道数的概率质量函数(PMF)来提出频谱使用的数学模型。请注意,这也提供了关于频谱可用性的见解。为此,使用了在卡塔尔国进行的频谱占用测量活动收集的数据。测量在连续三天内进行,考虑700-3000 MHz频段,同时在四个不同的位置进行。我们表明,在应用卡方检验后,对数正态分布在其他候选中最适合于独立于位置和用于定义通道被占用的阈值的经验PMF。
{"title":"Spatio-temporal measurement and model for number of occupied channels","authors":"K. Qaraqe, Nariman Rahimian, H. Çelebi, C. Georghiades","doi":"10.1109/CTS.2011.5898947","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898947","url":null,"abstract":"Cognitive Radio (CR) systems are a promising solution to the spectrum scarcity problem. However, accurate modeling of spectrum utilization is essential to obtain a better quantitative understanding of important concepts of CR systems. Compact mathematical formulations that describe the realistic spectrum usage would improve the recent theoretical work to a large extent. The data generated from such models would also increase the quality of the simulation based research in the aspect of realism. Besides, in practice, measurement campaigns would prefer if they could characterize results with a few well known parameters instead of exchanging large amount of data. Therefore, in this paper we try to come up with a mathematical model for the spectrum usage by estimating the Probability Mass Function (PMF) of the number of occupied channels. Note that this also gives an insight regarding the spectrum availability. To do this, the data collected from a spectrum occupancy measurement campaign conducted in the State of Qatar is used. The measurements are performed over three consecutive days considering 700–3000 MHz frequency band at four different locations concurrently. We show that after applying the Chi square test, the Log-Normal distribution fits the best among other candidates to the empirical PMF independent of location and the threshold used to define a channel as occupied.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"696 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133970280","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
Emergency operations support through social networking and P2P multimedia services 通过社交网络和P2P多媒体服务支持应急行动
Pub Date : 2011-05-08 DOI: 10.1109/CTS.2011.5898903
C. Patrikakis, A. Voulodimos, Emmanuel Sardis, N. Papaoulakis, Dora Christofi, Georgios Dimosthenous
In this paper we investigate the requirements and propose the design of a platform that will serve emergency operations such as in cases of wildfires or road accidents. This platform will provide assistance to the rescue and the disaster relief operations through the use of social networking and P2P based multimedia streaming. The general idea is to create a platform that will facilitate the provision of an efficient communication network between the stakeholders who will be involved in such life threatening situations and of the means for having a rich, multimedia based communication for first aid and guidance. Based on the use of the proposed platform the distribution of multimedia streams can be supported through innovative techniques such as media encoding and media distribution. The matching and notification of the most appropriate volunteers can be made through the use of personal profiles and the deployment of social networking tools. The access to multimedia content can be adapted to the obstacles which are introduced through the impairment of infrastructures of services capabilities.
在本文中,我们调查了需求,并提出了一个平台的设计,将服务于紧急行动,如在野火或道路事故的情况下。该平台将通过使用社交网络和基于P2P的多媒体流媒体,为救援和救灾行动提供援助。总的想法是创建一个平台,促进在涉及这种危及生命的情况的利益攸关方之间提供有效的通信网络,并提供丰富的、基于多媒体的急救和指导通信手段。基于该平台的使用,可以通过媒体编码和媒体分发等创新技术来支持多媒体流的分发。可以通过使用个人资料和部署社交网络工具来匹配和通知最合适的志愿者。多媒体内容的访问可以适应由于服务能力的基础设施的损害而引入的障碍。
{"title":"Emergency operations support through social networking and P2P multimedia services","authors":"C. Patrikakis, A. Voulodimos, Emmanuel Sardis, N. Papaoulakis, Dora Christofi, Georgios Dimosthenous","doi":"10.1109/CTS.2011.5898903","DOIUrl":"https://doi.org/10.1109/CTS.2011.5898903","url":null,"abstract":"In this paper we investigate the requirements and propose the design of a platform that will serve emergency operations such as in cases of wildfires or road accidents. This platform will provide assistance to the rescue and the disaster relief operations through the use of social networking and P2P based multimedia streaming. The general idea is to create a platform that will facilitate the provision of an efficient communication network between the stakeholders who will be involved in such life threatening situations and of the means for having a rich, multimedia based communication for first aid and guidance. Based on the use of the proposed platform the distribution of multimedia streams can be supported through innovative techniques such as media encoding and media distribution. The matching and notification of the most appropriate volunteers can be made through the use of personal profiles and the deployment of social networking tools. The access to multimedia content can be adapted to the obstacles which are introduced through the impairment of infrastructures of services capabilities.","PeriodicalId":142306,"journal":{"name":"2011 18th International Conference on Telecommunications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132799633","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
期刊
2011 18th International Conference on Telecommunications
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:481959085
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