IEEE Military Communications Conference, 2003. MILCOM 2003.最新文献_第4页

Congestion control in TCP/IP networks: a combined ECN and BECN approach TCP/IP网络中的拥塞控制:ECN和BECN的结合方法

IEEE Military Communications Conference, 2003. MILCOM 2003. Pub Date : 2003-10-13 DOI: 10.1109/MILCOM.2003.1290111

Frank Akujobi, N. Seddigh, B. Nandy, Rupinder, Makkar, Ioannis Lambadaris

{"title":"Congestion control in TCP/IP networks: a combined ECN and BECN approach","authors":"Frank Akujobi, N. Seddigh, B. Nandy, Rupinder, Makkar, Ioannis Lambadaris","doi":"10.1109/MILCOM.2003.1290111","DOIUrl":"https://doi.org/10.1109/MILCOM.2003.1290111","url":null,"abstract":"In this paper a novel algorithm is proposed which combines the merits of explicit congestion notification (ECN) and backward explicit congestion notification (BECN) mechanisms for congestion control in TCP/IP networks. A comparative performance evaluation of the combined ECN and BECN mechanism is carried out using both long-lived FTP flows and short-lived Web traffic. The simulation results show that the combined ECN+BECN mechanism benefits from BECN's early notification under heavy congestion and ECN's reliable delivery of congestion notification. It is observed that the ECN+BECN mechanism significantly reduces queue fluctuations due to early congestion indication compared to ECN. The loss of BECN Internet control message protocol (ICMP) source quenches on the reverse path does not adversely impact performance due to this combined approach. It is also shown that the ECN+BECN scheme can significantly reduce the ICMP source quench reverse traffic in a network compared to a BECN only network. Experiments with Web traffic workloads show measurable improvement in both average object transfer delay and fairness over ECN.","PeriodicalId":435910,"journal":{"name":"IEEE Military Communications Conference, 2003. MILCOM 2003.","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116851317","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

Data versus decision fusion for distributed classification in sensor networks 传感器网络中分布式分类的数据与决策融合

IEEE Military Communications Conference, 2003. MILCOM 2003. Pub Date : 2003-10-13 DOI: 10.1109/MILCOM.2003.1290169

A. D'Costa, A. Sayeed

{"title":"Data versus decision fusion for distributed classification in sensor networks","authors":"A. D'Costa, A. Sayeed","doi":"10.1109/MILCOM.2003.1290169","DOIUrl":"https://doi.org/10.1109/MILCOM.2003.1290169","url":null,"abstract":"Sensor networks provide virtual snapshots of the physical world via densely distributed wireless nodes that can sense in different modalities. Classification of objects moving through the sensor field is an important application that requires collaborative signal processing (CSP) between nodes. Given the limited resources of nodes, a key constraint is to exchange the least amount of information between them to achieve desired performance. Two main forms of CSP are possible. Data fusion-exchange of low-dimensional feature vectors - is needed between correlated nodes. Decision fusion exchange of local likelihood values - is sufficient between independent nodes. Decision fusion is generally preferable due to its lower communication burden. We study CSP classification algorithms based on a Gaussian model for sensor measurements that provides a simple abstraction of node correlation and yields a simple characterization of the optimal maximum likelihood classifier. Two extreme sub-optimal classifiers are also considered: a data-averaging classifier that treats all measurements as correlated, and a decision-fusion classifier that treats them all as independent. Analytical and numerical results based on real data are provided to compare the performance of the three CSP classifiers. Our results indicate that the sub-optimal decision fusion classifier, that is most attractive in the context of sensor networks, is also a robust choice from a decision theoretic viewpoint.","PeriodicalId":435910,"journal":{"name":"IEEE Military Communications Conference, 2003. MILCOM 2003.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125925062","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: 23

Performance of coded Gaussian minimum shift keying 编码高斯最小移位键控的性能

IEEE Military Communications Conference, 2003. MILCOM 2003. Pub Date : 2003-10-13 DOI: 10.1109/MILCOM.2003.1290079

R. Kerr, S. Crozier

引用次数: 1

Equal gain combining for acquisition of UWB signals 等增益组合用于UWB信号的采集

IEEE Military Communications Conference, 2003. MILCOM 2003. Pub Date : 2003-10-13 DOI: 10.1109/MILCOM.2003.1290239

S. Vijayakumaran, T. Wong

引用次数: 17

Swarming activities to distribute information in large sensor networks 在大型传感器网络中分布信息的蜂群活动

IEEE Military Communications Conference, 2003. MILCOM 2003. Pub Date : 2003-10-13 DOI: 10.1109/MILCOM.2003.1290186

Y. Hong, B. Sirkeci, A. Scaglione

引用次数: 2

SNIR estimation and statistics for DS-SS CDMA communications DS-SS CDMA通信SNIR估计与统计

IEEE Military Communications Conference, 2003. MILCOM 2003. Pub Date : 2003-10-13 DOI: 10.1109/MILCOM.2003.1290335

D. Matolak, Amit Gupta

引用次数: 2

Data throughput on MILSATCOM channels using military standard 188-184 and 188-181B 使用军用标准188-184和188-181B的MILSATCOM信道的数据吞吐量

IEEE Military Communications Conference, 2003. MILCOM 2003. Pub Date : 2003-10-13 DOI: 10.1109/MILCOM.2003.1290152

J. Norris

{"title":"Data throughput on MILSATCOM channels using military standard 188-184 and 188-181B","authors":"J. Norris","doi":"10.1109/MILCOM.2003.1290152","DOIUrl":"https://doi.org/10.1109/MILCOM.2003.1290152","url":null,"abstract":"The physical layer continuous phase modulated (CPM) waveforms that are defined in Mil-Std-188-181B can now be used with network layer protocols such as those defined in Mil-Std-188-184 and the UHF SATCOM high performance waveform (HPW). These CPM waveforms provide higher throughput than the standard, ubiquitous 16 kbps FSK waveform and this paper documents the performance of the combination of the two military standards as used in a tactical SATCOM radio (AN/PRC-117F). In addition, the uncoded CPM waveforms Mil-Std-188-181B also provide optional interleaving and Reed-Solomon outer codes which can be added to considerably enhance BER performance. This paper also documents the bit error rate performance of all of the Reed-Solomon coded waveforms in the tactical SATCOM radio. Unfortunately the improvement in bit error rate does not correspond to an equivalent improvement in data throughput. For example, since the Mil-Std-188-184 network layer provides an external \"keyline\" to a radio, the radio is required to wait until an interleaver is completely filled before transmitting an encoded set of data. This holdoff time also results in an equivalent wait time at the receiver while the entire codeword and interleaver block is demodulated and decoded at the receiver. The 184-capable receiver must wait for this end-to-end hold off time before it can respond with an ACK/NACK to the transmitter. This round-trip holdoff time consequently reduces the ultimate throughput of the message. This paper provides an analysis of this weakness in the strict layering (network/physical) approach to data throughput and provides recommendations for modifications to the Mil-Std-188-184 and HPW waveforms.","PeriodicalId":435910,"journal":{"name":"IEEE Military Communications Conference, 2003. MILCOM 2003.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121318191","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

Acquisition of packets with a short preamble for direct-sequence spread-spectrum multiple-access packet communications 用于直接序列扩频多址分组通信的具有短序文的分组采集

IEEE Military Communications Conference, 2003. MILCOM 2003. Pub Date : 2003-10-13 DOI: 10.1109/MILCOM.2003.1290320

Y. Jeong, J. Lehnert

引用次数: 4

Robust soft decision metrics for a turbo decoder in a partial band jammer environment 部分波段干扰环境下涡轮解码器的鲁棒软判决度量

IEEE Military Communications Conference, 2003. MILCOM 2003. Pub Date : 2003-10-13 DOI: 10.1109/MILCOM.2003.1290085

Arnon Binia, Giora Zilbershatz, R. Gozali

引用次数: 3

Small unit operations situation awareness system (SUO-SAS) radio architecture and system field testing results 小单元作战态势感知系统(SUO-SAS)无线电体系结构和系统现场测试结果

IEEE Military Communications Conference, 2003. MILCOM 2003. Pub Date : 2003-10-13 DOI: 10.1109/MILCOM.2003.1290102

D. Caprioni, A. Russo

引用次数: 8