Article(id=1312073344636248531, tenantId=1146029695717560320, journalId=1146031591421210625, issueId=1312073311350256541, articleNumber=null, orderNo=null, doi=10.3981/j.issn.1000-7857.2026.04.00001, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1774972800000, receivedDateStr=2026-04-01, revisedDate=1781625600000, revisedDateStr=2026-06-17, acceptedDate=null, acceptedDateStr=null, onlineDate=1790752262505, onlineDateStr=2026-09-30, pubDate=1787846400000, pubDateStr=2026-08-28, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1790752262505, onlineIssueDateStr=2026-09-30, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1790752262505, creator=13701087609, updateTime=1790752262505, updator=13701087609, issue=Issue{id=1312073311350256541, tenantId=1146029695717560320, journalId=1146031591421210625, year='2026', volume='44', issue='16', pageStart='1', pageEnd='180', issueExtLink='null', onlineDate='null', pubDate='1787846400000', pubDateStr='2026-08-28', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1790752254569, creator='13701087609', updateTime=1790753187383, updator='13701087609', preIssue=null, nextIssue=null, articleTotal=null, ext={EN=IssueExt(id=1312077223981576789, tenantId=1146029695717560320, journalId=1146031591421210625, issueId=1312073311350256541, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1312077223981576790, tenantId=1146029695717560320, journalId=1146031591421210625, issueId=1312073311350256541, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null, downloadFileDto=null}, startPage=137, endPage=146, ext={EN=ArticleExt(id=1312073344854352340, articleId=1312073344636248531, tenantId=1146029695717560320, journalId=1146031591421210625, language=EN, title=Reconfiguration−aware TCP optimization for LEO satellite Internet, columnId=1150494644690366681, journalTitle=Science & Technology Review, columnName=Papers, runingTitle=null, highlight=null, articleAbstract=
In recent years, low earth orbit (LEO) satellite constellations, represented by Starlink, OneWeb, China Satellite Network Group, and SpaceSail (Qianfan), have developed rapidly and are carrying an increasing volume of Internet traffic. However, the high mobility of LEO satellites causes substantial variations in link capacity, latency, and packet loss, posing significant challenges to end−to−end TCP transport. Existing end−to−end transport optimization approaches for satellite networks either require modifications and upgrades to end host kernels, making large−scale deployment difficult, or are designed primarily for conventional geostationary earth orbit (GEO) satellites and therefore cannot readily adapt to highly dynamic and time−varying LEO environments. To overcome these limitations, this work investigates TCP performance enhancement in LEO satellite networks and proposes StarPEP, a reconfiguration−aware and transparent performance enhancing proxy (PEP). StarPEP proactively regulates the sender's transmission by adjusting the TCP receive window at the proxy. By jointly exploiting the periodic reconfiguration characteristics of LEO satellite networks and dynamic variations in round−trip time (RTT) and bottleneck bandwidth, StarPEP effectively improves TCP transport performance without requiring any modification to end hosts. We implement a prototype of StarPEP on Linux. Trace−driven emulation experiments based on real−world LEO satellite network measurements show that, in terms of the trade−off between throughput and delay, StarPEP achieves closer to the Pareto frontier without modifying end hosts. Compared with the classic PEP using Hybla as its congestion control algorithm, StarPEP reduces end−to−end latency by 94.8%~95.9% while improving throughput by 49.3%~214.0%. Compared with the classic PEP using LeoCC, StarPEP reduces end−to−end latency by 89.1%~92.6% at the cost of only a small decrease in throughput.
, authors=Zonglun LI
1, Zeqi LAI
1, *, Ximing JIN
2, Qian WU
1, Hewu LI
1, authorsList=Zonglun LI, Zeqi LAI, Ximing JIN, Qian WU, Hewu LI, authorCompany=null, correspAuthors=Zeqi LAI, authorNote=null, correspAuthorsNote=null, copyrightStatement=
All rights reserved. Unauthorized reproduction is prohibited., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1312073348247544293, articleId=1312073344636248531, tenantId=1146029695717560320, journalId=1146031591421210625, language=CN, title=卫星互联网中路径重构感知的TCP传送优化方法, columnId=1146540929516700224, journalTitle=科技导报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=
以星链(Starlink)、一网(OneWeb)、中国星网、千帆为代表的低轨卫星星座快速发展,承载着越来越多的互联网流量。然而,低轨卫星高速移动导致链路容量、时延和丢包率剧烈变化,给传输控制协议(transmission control protocol,TCP)端到端传送带来重大挑战。现有卫星网络中的端到端传送优化方案,或者需要修改和升级端系统内核,难以大规模部署;或者面向传统的地球静止轨道卫星场景,难以应用于高度动态时变的低轨卫星环境。为克服现有方法的局限性,围绕低轨卫星网络环境下的TCP性能增强方法开展研究,提出一种低轨卫星重构可感知、端系统透明的性能增强代理StarPEP,通过在代理处调节TCP接收窗口以主动控制发送端速率,结合低轨卫星的周期性重构特征、RTT(round−trip time)与瓶颈链路带宽动态变化特征,在不修改端系统的前提下有效提升TCP传送性能。本研究依托Linux系统实现StarPEP原型系统。真实低轨卫星网络数据驱动的仿真试验表明:从吞吐量与时延的二维关系看,StarPEP可以在不修改端系统的前提下更接近帕累托改进方向,相比使用Hybla作为拥塞控制算法的PEP,将端到端时延降低了94.8%~95.9%,吞吐量提升了49.3%~214.0%;相比使用LeoCC作为拥塞控制算法的PEP,在牺牲少量吞吐的同时将端到端时延降低了89.1%~92.6%。
, authors=李宗伦
1, 赖泽祺
1, *, 金熙明
2, 吴茜
1, 李贺武
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版权所有,未经授权,不得转载。, copyrightOwner=《科技导报》编辑部, extLink=null, articleAbsUrl=null, sourceXml=dyya2f7/BDBwrvy2dB17hA==, magXml=JzzHiluvaT4ZUEZ3kH5C8w==, pdfUrl=null, pdf=f6cWdfl07JbM80bQ+caC4Q==, pdfFileSize=2254883, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=FTG2qJ+eJqoECnZeifwB3A==, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=BiY/++e6+nI6mV+Y0T/MQg==, mapNumber=null, fund=null)}, authors=[Author(id=1312073348629225965, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1312073344636248531, orderNo=0, firstName=null, middleName=null, lastName=null, nameCn=null, orcid=null, stid=null, country=null, authorPic=null, dead=0, email=lzl24@mails.tsinghua.edu.cn, emailSecond=null, emailThird=null, correspondingAuthor=0, authorType=1, ext={EN=AuthorExt(id=1312073348696334832, tenantId=1146029695717560320, journalId=1146031591421210625, articleId=1312073344636248531, authorId=1312073348629225965, language=EN, stringName=Zonglun LI, firstName=Zonglun, middleName=null, lastName=LI, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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李宗伦,硕士研究生,研究方向为天地一体化互联网拥塞控制,电子信箱:lzl24@mails.tsinghua.edu.cn
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| α | 平均吞吐量/Mbps | 平均单向时延/ms |
|---|
| 0.1 | 37.856 | 0.129 |
| 0.2 | 44.484 | 0.143 |
| 0.3 | 45.464 | 0.134 |
| 0.4 | 46.812 | 0.142 |
| 0.5 | 47.167 | 0.143 |
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参数α的敏感性分析
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| α | 平均吞吐量/Mbps | 平均单向时延/ms |
|---|
| 0.1 | 37.856 | 0.129 |
| 0.2 | 44.484 | 0.143 |
| 0.3 | 45.464 | 0.134 |
| 0.4 | 46.812 | 0.142 |
| 0.5 | 47.167 | 0.143 |
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| β | 平均吞吐量/Mbps | 平均单向 时延/ms |
|---|
| 0.5 | 38.902 | 0.100 |
| 0.6 | 39.416 | 0.101 |
| 0.7 | 41.615 | 0.106 |
| 0.8 | 44.174 | 0.122 |
| 0.9 | 45.741 | 0.134 |
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参数β的敏感性分析
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| β | 平均吞吐量/Mbps | 平均单向 时延/ms |
|---|
| 0.5 | 38.902 | 0.100 |
| 0.6 | 39.416 | 0.101 |
| 0.7 | 41.615 | 0.106 |
| 0.8 | 44.174 | 0.122 |
| 0.9 | 45.741 | 0.134 |
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