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2010 Wireless Telecommunications Symposium (WTS)最新文献

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A clustering approximation mechanism based on data spatial correlation in wireless sensor networks 无线传感器网络中基于数据空间相关性的聚类逼近机制
Pub Date : 2010-04-21 DOI: 10.1109/WTS.2010.5479626
Zhikui Chen, Song Yang, Liang Li, Zhijiang Xie
In wireless sensor networks (WSNs), the sensor nodes that locate near often sense the similar data, however, transmitting the repeated or redundant data often cause unnecessary energy consumption. Aiming at this point, this paper firstly proposes a gridbased spatial correlation clustering (GSCC) method which clusters the sensor nodes according to data correlation. According to GSCC, in the same cluster the member nodes have high similarity. Based on GSCC, then this paper proposes a spatial correlation clustering approximation framework (SCCAF). SCCAF can largely save networks' energy by which the cluster head estimates the data of its member nodes provided that approximation value is in the allowable error range. Experiments prove that not only SCCAF based on GSCC method can prolong the lifetime of the sensor networks compared with LEACH but also SCCAF guarantees more accuracy than CASA (clustering-based approximate scheme for data aggregation) which is a previous approximation scheme.
在无线传感器网络(WSNs)中,位置较近的传感器节点经常感知相似的数据,但传输重复或冗余的数据往往会造成不必要的能量消耗。针对这一点,本文首先提出了一种基于网格的空间相关聚类(GSCC)方法,该方法根据数据的相关性对传感器节点进行聚类。根据GSCC,在同一聚类中,成员节点具有较高的相似性。在此基础上,提出了空间相关聚类近似框架(SCCAF)。SCCAF在允许误差范围内的情况下,簇头对其成员节点的数据进行估计,可以极大地节省网络的能量。实验证明,与LEACH方法相比,基于GSCC方法的SCCAF不仅可以延长传感器网络的寿命,而且SCCAF比以往的近似方案CASA(基于聚类的数据聚合近似方案)具有更高的精度。
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引用次数: 29
No-reference Quality of Experience monitoring in DVB-H networks DVB-H网络中体验监控的无参考质量
Pub Date : 2010-04-21 DOI: 10.1109/WTS.2010.5479651
K. Singh, G. Rubino
The Personal Mobile Television (PMT) is a commercial reality in many countries, and is becoming a reality in other places. The Quality of Experience (QoE) actually delivered to end users will be one of the key criteria for the adoption of this new service. In order to evaluate it, objective quality assessment tools may not correlate well with the human perceived video quality and, at the same time, subjective quality assessment methods are costly and time consuming. In this paper, we design an automatic QoE monitoring module for H.264 video over DVB-H [1] networks. The module is based on both network and video parameters. We describe some strategies for extracting and measuring these parameters in DVB-H networks without any access to the original signal. The results show that our QoE estimation module captures the nonlinear relationship between these parameters and QoE. Moreover, our consideration of additional parameters leads to significant improvement in QoE estimation accuracy when compared to recent ITU QoE models for video streams.
个人移动电视(PMT)在许多国家已经成为商业现实,在其他地方也正在成为现实。实际交付给最终用户的体验质量(QoE)将是采用这种新服务的关键标准之一。为了对其进行评价,客观的质量评估工具可能与人类感知的视频质量没有很好的相关性,同时主观的质量评估方法成本高,耗时长。本文设计了一个基于DVB-H[1]网络的H.264视频QoE自动监控模块。该模块基于网络参数和视频参数。我们描述了在不访问原始信号的情况下,在DVB-H网络中提取和测量这些参数的一些策略。结果表明,我们的QoE估计模块捕获了这些参数与QoE之间的非线性关系。此外,与最近用于视频流的ITU QoE模型相比,我们对附加参数的考虑显著提高了QoE估计精度。
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引用次数: 12
A performance analysis for UMTS packet switched network based on multivariate KPIs 基于多元kpi的UMTS分组交换网络性能分析
Pub Date : 2010-03-29 DOI: 10.5121/ijngn.2010.2107
Ye Ouyang, M. Fallah
Mobile data services are penetrating mobile markets rapidly. The mobile industry relies heavily on data service to replace the traditional voice services with the evolution of the wireless technology and market. A reliable packet service network is critical to the mobile operators to maintain their core competence in data service market. Furthermore, mobile operators need to develop effective operational models to manage the varying mix of voice, data and video traffic on a single network. Application of statistical models could prove to be an effective approach. This paper first introduces the architecture of Universal Mobile Telecommunications System (UMTS) packet switched (PS) network and then applies multivariate statistical analysis to Key Performance Indicators (KPI) monitored from network entities in UMTS PS network to guide the long term capacity planning for the network. The approach proposed in this paper could be helpful to mobile operators in operating and maintaining their 3G packet switched networks for the long run.
移动数据服务正在迅速渗透移动市场。随着无线技术和市场的发展,移动通信行业严重依赖数据业务来取代传统的语音业务。一个可靠的分组业务网络是移动运营商在数据业务市场中保持核心竞争力的关键。此外,移动运营商需要开发有效的运营模式,以管理单一网络上各种混合的语音、数据和视频流量。应用统计模型可以证明是一种有效的方法。本文首先介绍了通用移动通信系统(UMTS)分组交换(PS)网络的体系结构,然后对UMTS分组交换网络中各网络实体监控的关键绩效指标(KPI)进行多元统计分析,指导网络的长期容量规划。本文提出的方法有助于移动运营商长期运营和维护其3G分组交换网络。
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引用次数: 17
VLSI implementation of A multi-standard MIMO symbol detector for 3GPP LTE and WiMAX 3GPP LTE和WiMAX多标准MIMO符号检测器的VLSI实现
Pub Date : 2009-12-01 DOI: 10.1109/WTS.2010.5479665
Di Wu, J. Eilert, R. Asghar, Dake Liu, Magic Ge
In this paper, a low-complexity symbol detector is presented targeting the emerging 3GPP LTE and WiMAX standards. The detector is the VLSI implementation of a novel MIMO detection algorithm recently proposed. Compared to the design in the reference, the detector performs better while consumes less silicon area. Including a microcode controlled channel preprocessing unit and a pipelined detection unit, it is flexible enough to cover different standards and transmission schemes while maintaining the power and area efficiency. Implemented using 65 nm CMOS process, the detector can support real-time detection of 20 MHz bandwidth 3GPP LTE or 10 MHz WiMAX downlink physical channel.
本文针对新兴的3GPP LTE和WiMAX标准,提出了一种低复杂度的符号检测器。该检测器是最近提出的一种新型MIMO检测算法的VLSI实现。与参考文献中的设计相比,该探测器在消耗较少硅面积的同时性能更好。它包括一个微码控制的信道预处理单元和一个流水线检测单元,足够灵活,可以覆盖不同的标准和传输方案,同时保持功率和面积效率。探测器采用65nm CMOS工艺实现,可支持20mhz带宽3GPP LTE或10mhz WiMAX下行物理信道的实时检测。
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引用次数: 7
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2010 Wireless Telecommunications Symposium (WTS)
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