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2013 IEEE International Conference on Communications (ICC)最新文献

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On effectiveness of integrating intermittent resources and electricity vehicles in the smart grid 智能电网中间歇性资源与电动汽车整合的有效性研究
Pub Date : 2013-06-09 DOI: 10.1109/ICC.2013.6655234
Jie Lin, Wei Yu, Xinyu Yang, Cong Zhao, Qingyu Yang
The smart grid shall not only integrate the intermittent resources (IRs) to meet the diverse demands of users and reduce the greenhouse gas emission, but also integrate Electricity Vehicles (EVs) as the energy storage facility to smooth the bulk power generation over time. In this paper, we model and analyze the impact of integrating IRs and EVs on the bulk power generation in the smart grid. In particular, we introduce the reliability ratio to quantify the power generation capacity of intermittent resources and model the process of charging and discharging of EVs as a queuing system. We extend the Security-Constrained Economic Dispatch (SCED) and include the reliability limit of IRs and the number of EVs in the power generation dispatch process and formally analyze the effect of IRs and EVs on the bulk power generation. We conduct extensive simulation and our data shows that increasing IRs can decrease the bulk generation and the curve of bulk generation over time becomes smooth as the number of EVs increases.
智能电网既要整合间歇性资源,满足用户多样化的用电需求,减少温室气体排放,又要整合电动汽车作为储能设施,使大容量发电随着时间的推移更加顺畅。在本文中,我们建立模型并分析了智能电网中集成ir和电动汽车对大容量发电的影响。特别地,我们引入可靠性比来量化间歇性资源的发电能力,并将电动汽车的充放电过程建模为一个排队系统。对安全约束经济调度(SCED)进行了扩展,在发电调度过程中引入了电网的可靠性限制和电动汽车的数量限制,并正式分析了电网和电动汽车对大容量发电的影响。我们进行了广泛的模拟,我们的数据表明,增加ir可以减少批量发电量,批量发电量随时间的变化曲线随着电动汽车数量的增加而变得平滑。
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引用次数: 1
On the coexistence of primary and secondary users in spectrum-sharing broadcast channels 频谱共享广播信道中主从用户共存问题研究
Pub Date : 2013-06-09 DOI: 10.1109/ICC.2013.6655015
Yuli Yang, S. Aïssa
In this paper, we consider a broadcast channel in spectrum-sharing networks, where the base station schedules licensed primary users (PUs) and cognitive secondary users (SUs) simultaneously. Based on such a framework, we present a transmission strategy in the light of dirty paper coding. In order to promise the PUs' quality of service (QoS) in the broadcasting, the base station chooses codewords for the users by taking into account that the codewords pertaining to SUs can be pre-subtracted from those pertaining to PUs as if there were no interference from the secondary's data to the primary's data. For the purpose of performance evaluation, by taking capacity behavior and bit error rate (BER) as metrics, we study the achievable data rate regions for both types of users with the introduced design, and analyze the BER performance in corresponding systems implemented with hierarchical modulation. Numerical results substantiate that with flexible management of the spectrum resources, our proposed scheme provides more communication opportunities for SUs while maintaining PUs' QoS at an acceptable level.
本文考虑了频谱共享网络中的广播信道,其中基站同时调度许可主用户(pu)和认知辅助用户(SUs)。在此基础上,提出了一种针对脏纸编码的传输策略。为了保证pu在广播中的服务质量(QoS),基站为用户选择码字时,考虑到与pu相关的码字可以在次要数据对主数据没有干扰的情况下从与pu相关的码字中预减去与su相关的码字。在性能评估方面,以容量行为和误码率(BER)为指标,研究了采用所引入设计的两类用户可实现的数据速率区域,并分析了采用分层调制实现的相应系统的误码率性能。数值结果表明,通过对频谱资源的灵活管理,我们所提出的方案在将pu的QoS保持在可接受水平的同时,为su提供了更多的通信机会。
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引用次数: 6
Joint subchannel and power allocation in two-tier OFDMA HetNets with clustered femtocells 带集群飞蜂窝的两层OFDMA HetNets联合子信道和功率分配
Pub Date : 2013-06-09 DOI: 10.1109/ICC.2013.6655560
Amr Abdelnasser, E. Hossain
Efficient power and subchannel allocation methods are required for orthogonal frequency division multiple access (OFDMA)-based femtocells to mitigate both co-tier and cross-tier interferences. In this paper, we study the problem of joint power and subchannel allocation in a densely deployed femtocell network with constraints on co-tier and cross-tier interference and minimum datarate requirements. A convex optimization problem is formulated and the solution of the problem is obtained numerically. For this joint resource allocation problem, the effect of clustering (or cooperation) is studied as well, where femtocells are placed in disjoint groups. The performances of distributed resource allocation (i.e., without clustering) and centralized resource allocation (i.e., with only one cluster) are compared against clustering-based (i.e., semi-distributed) resource allocation. Numerical results show that, in a dense environment, with femtocells closely located to each other, the effect of co-tier interference becomes significantly dominant and clustering is a very effective technique in such a densely deployed environment to improve the sumrate capacity of the femtocells.
基于正交频分多址(OFDMA)的飞基站需要有效的功率和子信道分配方法来减轻共层和跨层干扰。本文研究了基于协层和跨层干扰约束和最小数据要求的密集部署飞蜂窝网络中的联合功率和子信道分配问题。提出了一个凸优化问题,并给出了该问题的数值解。对于这种联合资源分配问题,还研究了聚类(或合作)的影响,其中飞蜂窝被放置在不相交的组中。将分布式资源分配(即无集群)和集中式资源分配(即只有一个集群)的性能与基于集群的(即半分布式)资源分配进行比较。数值计算结果表明,在密集的环境中,基站之间的距离较近,共层干扰的影响明显占主导地位,在这种密集的环境中,聚类是一种非常有效的技术,可以提高基站的覆盖能力。
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引用次数: 16
Cognitive beamforming with unknown cross channel state information 具有未知跨信道状态信息的认知波束形成
Pub Date : 2013-06-09 DOI: 10.1109/ICC.2013.6655359
Sheng-Ming Cai, Yi Gong
Throughput maximization is considered in this paper for a multiple-input multiple-output (MIMO) cognitive radio system when no cross channel state information is available at the secondary transmitter (ST). We study cognitive beamforming subject to interference expectation constraint and interference outage probability constraint at the primary receiver (PR), respectively. We prove that with the former constraint, the beamforming problem can be formulated as a conventional MIMO transmission problem, which can be easily solved via the water-filling method. With the latter constraint, we find that the interference power is related to the eigenvalues of the covariance matrix of the secondary signals, and thus it can be expressed as a linear combination of multiple chi-square distributed variables. By exploiting the impact of the eigenvalues on the interference outage probability and establishing the relationship between the vibrations of secondary covariance matrix and its eigenvalues, we design an algorithm for this beamforming problem. Finally, simulation results are presented to demonstrate the performance of the proposed beamforming solutions subject to both constraints.
本文研究了多输入多输出(MIMO)认知无线电系统在二次发射机(ST)无跨信道状态信息时的吞吐量最大化问题。研究了在主接收机干扰期望约束和干扰中断概率约束下的认知波束形成。我们证明了在前一约束条件下,波束形成问题可以表示为一个传统的MIMO传输问题,可以很容易地通过充水方法来解决。在后一种约束条件下,我们发现干扰功率与二次信号协方差矩阵的特征值有关,因此可以表示为多个卡方分布变量的线性组合。利用特征值对干扰中断概率的影响,建立二次协方差矩阵的振动与其特征值之间的关系,设计了该波束形成问题的算法。最后,给出了仿真结果,验证了在两种约束条件下所提出的波束形成方案的性能。
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引用次数: 1
Coordinated beamforming for wireless multicast cell with nonregenerative multi-antenna relay 非再生多天线中继无线组播小区的协调波束形成
Pub Date : 2013-06-09 DOI: 10.1109/ICC.2013.6655296
Haibin Wan, Wen Chen
This paper considers the wireless multicast cell, in which two source nodes with multiple antennas communicate with two destinations over a common medium simultaneously assisted by a multi-antenna relay node. Assume that the sources and relay have individual power constraints. The purpose of this work is to develop an optimal algorithm to compute the source beamforming vectors and the relay beamforming matrix to maximize the system sum-rate, subject to the power constraints in the sources and relay. The problem is nonconvex and apparently has no simple solution. In this paper, We first develop the beamforming vectors at the sources, and then explore the linear beamforming matrix for the nonregenerative relay, Finally, we present a coordinated optimal algorithm to jointly optimize the vectors and matrix, which performance is compared with the conventional methods. Simulations demonstrate that our algorithm outperforms the conventional methods.
本文研究了无线组播小区,其中具有多个天线的两个源节点在一个多天线中继节点的辅助下,通过一个公共介质同时与两个目的地通信。假设源和继电器具有各自的功率限制。本工作的目的是开发一种最优算法来计算源波束形成矢量和中继波束形成矩阵,以最大限度地提高系统和速率,同时受源和中继的功率限制。这个问题是非凸的,显然没有简单的解决方案。本文首先给出了源处的波束形成矢量,然后探讨了非再生中继的线性波束形成矩阵,最后提出了一种联合优化矢量和矩阵的协调优化算法,并与传统方法进行了性能比较。仿真结果表明,该算法优于传统方法。
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引用次数: 1
Spatially coupled streaming modulation 空间耦合流调制
Pub Date : 2013-06-09 DOI: 10.1109/ICC.2013.6655077
D. Truhachev, C. Schlegel
A novel modulation format based on coupling for streaming data transmissions is proposed. The construction utilizes an infinite parity-check matrix of a low-density parity-check convolutional code which is used for data encoding with real-domain addition instead of modulo-two addition. The demodulation and decoding is accomplished using iterative bit estimation and interference cancellation. We demonstrate that the threshold saturation effect of spatial graph coupling holds for the proposed format and the achievable communication rate approaches the additive white Gaussian noise channel capacity and exceeds the capacities of traditional PAM modulations.
提出了一种新的基于耦合的流数据传输调制格式。该构造利用低密度奇偶校验卷积码的无限奇偶校验矩阵,该矩阵用于实数域加法而不是模二加法的数据编码。解调和解码是通过迭代比特估计和干扰消除来完成的。我们证明了空间图耦合的阈值饱和效应适用于所提出的格式,并且可实现的通信速率接近加性高斯白噪声信道容量并超过传统PAM调制的容量。
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引用次数: 8
Optimal transmit filters for constrained complexity channel shortening detectors 约束复杂性信道缩短检测器的最优传输滤波器
Pub Date : 2013-06-09 DOI: 10.1109/ICC.2013.6655017
Andrea Modenini, F. Rusek, G. Colavolpe
We consider intersymbol interference channels with reduced-complexity, mutual information optimized, channel-shortening detectors. For a given channel and receiver complexity, we optimize the transmit filter to use. The cost function we consider is the (Shannon) achievable information rate of the entire transceiver system. By functional analysis, we can establish a general form of the optimal transmit filter, which can then be optimized by standard numerical methods. As a side result, we also obtain an insight of the behaviour of the standard waterfilling algorithm for intersymbol interference channels.
我们考虑了具有降低复杂性、互信息优化、缩短信道检测器的符号间干扰信道。对于给定的信道和接收器复杂性,我们优化了要使用的发射滤波器。我们考虑的代价函数是整个收发系统的(香农)可达信息率。通过泛函分析,我们可以建立最优传输滤波器的一般形式,然后用标准数值方法对其进行优化。作为附带结果,我们还获得了符号间干涉通道的标准注水算法的行为的洞察力。
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引用次数: 4
An optimal and fully explicit rate controller for high-speed networks 高速网络的最佳和完全明确的速率控制器
Pub Date : 2013-06-09 DOI: 10.1109/ICC.2013.6655140
Jungang Liu, O. Yang
We have designed and investigated a new congestion control scheme, called the OFEX (Optimal and Fully EXplicit) controller. Different from the existing relatively explicit controllers, this new scheme is able to provide not only optimal bandwidth allocation but also fully explicit congestion signal to sources. It overcomes the drawback of the relatively explicit controllers that “bias” the multi-bottlenecked users, and improves their convergence speed and source throughput performance. Furthermore, the OFEX controller design considers a dynamic model by proposing a remedial measure against the unpredictable bandwidth changes in contention-based networks (such as shared Ethernet and IEEE 802.11). Compared with the former works/controllers, such a remedy also effectively reduces the instantaneous queue size in a link, and thus significantly improving the queueing delay and system stability performance. We have evaluated the effectiveness of the OFEX controller in OPNET. The experimental comparison verifies the superiority of the OFEX controller.
我们设计并研究了一种新的拥塞控制方案,称为OFEX(最优和完全显式)控制器。与现有的相对显式控制器不同,该方案不仅能够提供最优的带宽分配,而且能够向源提供完全显式的拥塞信号。克服了相对显式控制器对多瓶颈用户“偏置”的缺点,提高了控制器的收敛速度和源吞吐量性能。此外,OFEX控制器设计考虑了一个动态模型,提出了一种针对基于竞争的网络(如共享以太网和IEEE 802.11)中不可预测的带宽变化的补救措施。与之前的作品/控制器相比,这种补救措施还有效地减少了链路上的瞬时队列大小,从而显著提高了排队延迟和系统稳定性性能。我们在OPNET中评估了OFEX控制器的有效性。实验对比验证了OFEX控制器的优越性。
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引用次数: 4
Admission control scheme for Proxy Mobile IPv6 networks 代理移动IPv6网络的准入控制方案
Pub Date : 2013-06-09 DOI: 10.1109/ICC.2013.6655549
Nika Naghavi, V. Friderikos, Toktam Mahmoodi, H. Aghvami
This paper's central aim is to address the issue of resource management at the Local Mobility Anchors (LMA) in the Proxy Mobile IPv6 (PMIPv6) networks. A class-based admission control is proposed to improve the bottleneck effect caused by triangular routing in PMIPv6, where resource units are rationed amongst different classes of traffic according to their QoS requirements. The PMIPv6 network is modeled as an M/M/m/m tandem queuing network with two types (classes) of arrival process and an analytical model is presented. Performance of our proposed admission control scheme is evaluated through simulation and results are compared to the case where no distinction in terms of resource unit allocation between classes of traffic was considered.
本文的中心目标是解决代理移动IPv6 (PMIPv6)网络中本地移动锚点(LMA)的资源管理问题。为了改善PMIPv6中三角形路由造成的瓶颈效应,提出了一种基于类的准入控制,在PMIPv6中,资源单元在不同的流量类别之间根据其QoS需求进行定量分配。将PMIPv6网络建模为具有两类到达过程的M/M/ M/M串联排队网络,并给出了解析模型。我们提出的准入控制方案的性能通过仿真进行了评估,并将结果与不考虑流量类别之间资源单元分配的情况进行了比较。
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引用次数: 0
Towards an error control scheme for a publish/subscribe network 面向发布/订阅网络的错误控制方案
Pub Date : 2013-06-09 DOI: 10.1109/ICC.2013.6655137
Charilaos Stais, Alexios Voulimeneas, G. Xylomenos
Many proposals for the next generation of the Internet suggest moving from an end-point oriented to an information-centric oriented architecture. Many of these proposals are based on the publish/subscribe paradigm, which lends itself naturally to native multicast support, a key factor for efficient content distribution. However, the design of efficient reliable transport protocols for multicast is a largely open problem, due to the problem of feedback implosion towards the sender as group size grows. In this paper we propose a hierarchical retransmission-based error control scheme for a native publish/subscribe internetwork. We compare our protocol with similar approaches proposed for IP multicast and evaluate its performance against IP multicast with unicast-based error control.
许多关于下一代Internet的建议都建议从面向端点的体系结构转向面向信息中心的体系结构。这些建议中有许多是基于发布/订阅范式的,它自然地为本地多播提供了支持,这是高效内容分发的一个关键因素。然而,高效可靠的多播传输协议的设计在很大程度上是一个开放的问题,因为随着组规模的增长,发送方的反馈内爆问题。本文提出了一种基于分层重传的本地发布/订阅网络错误控制方案。我们将该协议与IP组播的类似方法进行了比较,并评估了其与基于单播的错误控制的IP组播的性能。
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引用次数: 6
期刊
2013 IEEE International Conference on Communications (ICC)
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