Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE最新文献_第8页

Average level crossing rate and average outage duration of switched diversity systems 交换分集系统的平均电平交叉率和平均停机时间

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE Pub Date : 2002-11-17 DOI: 10.1109/GLOCOM.2002.1188432

L. Yang, Mohamed-Slim Alouini

引用次数: 5

A scalable on-line multilevel distributed network fault detection/monitoring system based on the SNMP protocol 基于SNMP协议的可扩展在线多级分布式网络故障检测/监测系统

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE Pub Date : 2002-11-17 DOI: 10.1109/GLOCOM.2002.1188542

Ming-Shan Su, K. Thulasiraman, Anindya Das

{"title":"A scalable on-line multilevel distributed network fault detection/monitoring system based on the SNMP protocol","authors":"Ming-Shan Su, K. Thulasiraman, Anindya Das","doi":"10.1109/GLOCOM.2002.1188542","DOIUrl":"https://doi.org/10.1109/GLOCOM.2002.1188542","url":null,"abstract":"Traditional centralized network management solutions do not scale to present-day large-scale computer/communication networks. Decentralization/distributed solutions can solve some of these problems (Goldszmidt, G. and Yemini, Y., 1995), and thus there is considerable interest in distributed/decentralized network management applications. We present the design and evaluation of an SNMP-based distributed network fault detection/monitoring system. We integrate into the SNMP framework our ML-ADSD algorithm (Su, M.-S. et al., Proc. 39th Annual Allerton Conf. on Commun., Control, and Computers, 2001; Su, \"Multilevel distributed diagnosis and the design of a distributed network fault detection system based on the SNMP protocol\", Ph.D. Thesis, School of Computer Science, University of Oklahoma, 2002) for fault diagnosis in a distributed processor system. The algorithm uses the multilevel paradigm and requires only minor modifications to be scalable to networks of varying sizes. The system is fault tolerant, allowing processor failure and/or recovery during the diagnosis process. We have implemented the system on an Ethernet network of 32 machines. Our results show that the diagnosis latency (or time to termination) is much better than that of earlier solutions. Also, the system's bandwidth utilization is insignificant, demonstrating the practicality of its deployment in a real network. We have successfully integrated three modern disciplines: network management, distributed computing and system level diagnosis.","PeriodicalId":415837,"journal":{"name":"Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE","volume":"382 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123955952","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: 22

A scheduling algorithm minimizing voids generated by arriving bursts in optical burst switched WDM network 一种最小化光突发交换WDM网络中到达突发所产生空隙的调度算法

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE Pub Date : 2002-11-17 DOI: 10.1109/GLOCOM.2002.1189127

M. Iizuka, M. Sakuta, Y. Nishino, I. Sasase

引用次数: 38

Degree-constrained multihop scatternet formation for Bluetooth networks 蓝牙网络的度约束多跳散射网形成

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE Pub Date : 2002-11-17 DOI: 10.1109/GLOCOM.2002.1188073

C. Petrioli, S. Basagni

引用次数: 93

On the performance of WAR systems with limited number of ISM-band ad hoc relay channels 关于具有数量有限的 ISM 波段特设中继信道的 WAR 系统的性能

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE Pub Date : 2002-11-17 DOI: 10.1109/GLOCOM.2002.1188516

O. Tonguz, E. Yanmaz

引用次数: 6

Analysis of an enhanced signaling network for scalable mobility management in next generation wireless networks 下一代无线网络中可扩展移动管理的增强型信令网络分析

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE Pub Date : 2002-11-17 DOI: 10.1109/GLOCOM.2002.1188208

Jeremy Abramson, Xiao-yan Fang, D. Ghosal

引用次数: 0

Delay performance of high-speed packet switches with low speedup 低速加速下高速分组交换机的延迟性能

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE Pub Date : 2002-11-17 DOI: 10.1109/GLOCOM.2002.1189106

P. Giaccone, Emilio Leonardi, B. Prabhakar, D. Shah

{"title":"Delay performance of high-speed packet switches with low speedup","authors":"P. Giaccone, Emilio Leonardi, B. Prabhakar, D. Shah","doi":"10.1109/GLOCOM.2002.1189106","DOIUrl":"https://doi.org/10.1109/GLOCOM.2002.1189106","url":null,"abstract":"The speedup of a switch is the factor by which the switch, and hence the memory used in the switch, runs faster compared to the line rate. In high-speed switches, line rates are already touching the limits at which memory can operate. It is very important for a switch to run at as low a speedup as possible. For an input queued (IQ) switch at speedup 1, 100% throughput can be achieved for any admissible traffic (McKeown, N. et al., 1999; Dai, J. and Prabhakar, B., 2000). This gives finite average delays but does not guarantee control on packet delays. S.T. Chuang et al. (see IEEE J. Selected Areas of Commun., vol.17, no.6, p.1030-9, 1999) show that a combined input output queued (CIOQ) switch can emulate perfectly an output queued (OQ) switch at a speedup of 2 and, thus, control the packet delays. This motivates a study of the possibility of obtaining delay control at speedup less than 2. To guarantee optimal control of delays for a general class of traffic, as shown by Chuang et al., speedup 2 is necessary. Hence, to obtain control of delays at lower speedup, we need to restrict the class of arrival traffic. We study the speedup requirement for a class of admissible traffic, which we denote as (1, nF)-regulated traffic, with parameters n and F. We obtain the necessary speedup for this class of traffic. Further, we present a general class of algorithms working at the necessary speedups and thus providing bounded delays.","PeriodicalId":415837,"journal":{"name":"Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130108773","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

Hierarchical fair queuing: single-step approximation of hierarchical-GPS 分层公平排队:分层gps的单步逼近

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE Pub Date : 2002-11-17 DOI: 10.1109/GLOCOM.2002.1189062

A. Jun, Ji-Young Choe, A. Leon-Garcia

引用次数: 1

SPeCRA: a stochastic performance comparison routing algorithm for LSP setup in MPLS networks SPeCRA:一种用于MPLS网络LSP建立的随机性能比较路由算法

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE Pub Date : 2002-11-17 DOI: 10.1109/GLOCOM.2002.1189020

J. D. Oliveira, F. Martinelli, C. Scoglio

引用次数: 14

Antenna weight verification for closed-loop downlink eigenbeamforming 闭环下行本征波束形成的天线权重验证

Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE Pub Date : 2002-11-17 DOI: 10.1109/GLOCOM.2002.1188224

A. Seeger, M. Sikora, W. Utschick

{"title":"Antenna weight verification for closed-loop downlink eigenbeamforming","authors":"A. Seeger, M. Sikora, W. Utschick","doi":"10.1109/GLOCOM.2002.1188224","DOIUrl":"https://doi.org/10.1109/GLOCOM.2002.1188224","url":null,"abstract":"Adaptive antennas at the base stations have a big potential to increase downlink capacity and coverage in WCDMA systems. One of the most promising techniques of adaptive antenna control is closed-loop transmit diversity. This method achieves beamforming gain as well as diversity gain by feedback of downlink fast fading characteristics from mobile station to base station. Due to the limited feedback rate, typically the best antenna weight vector chosen from a restricted set is reported. If this feedback is subject to transmission errors, two performance degrading effects occur: a suboptimal weight vector is used and channel estimation errors take place at the mobile station. The latter effect arises because the mobile station derives the channel estimate for the dedicated channel from the reported weight vector and the channel estimate per antenna based on the common pilot channel. In effect, feedback errors severely distort this estimate and lead to an error floor effect. However, channel estimation can also be based on the pilot symbols in the dedicated channel itself. This estimate has high variance, but is not distorted by feedback errors. If both estimates are combined in a process called antenna weight verification, performance can be dramatically increased. Within this paper an antenna weight verification scheme for eigenbeamformer is presented, which maximizes the estimation accuracy and eliminates the error floor. This is demonstrated by theoretical analysis and link-level simulations. It is shown that this antenna weight verification reduces the performance degradation to 0.2 dB at 1% frame error rate.","PeriodicalId":415837,"journal":{"name":"Global Telecommunications Conference, 2002. GLOBECOM '02. IEEE","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130893404","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