Article(id=1172525475340628438, tenantId=1146029695717560320, journalId=1152916057816748034, issueId=1172525471628673796, articleNumber=null, orderNo=null, doi=10.3969/j.issn.2095‒1469.2025.04.07, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1714320000000, receivedDateStr=2024-04-29, revisedDate=1718812800000, revisedDateStr=2024-06-20, acceptedDate=null, acceptedDateStr=null, onlineDate=1757481457791, onlineDateStr=2025-09-10, pubDate=1752940800000, pubDateStr=2025-07-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1757481457791, onlineIssueDateStr=2025-09-10, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1757481457791, creator=13701087609, updateTime=1757481457791, updator=13701087609, issue=Issue{id=1172525471628673796, tenantId=1146029695717560320, journalId=1152916057816748034, year='2025', volume='15', issue='4', pageStart='427', pageEnd='619', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=1, specialIssue=null, createTime=1757481456904, creator=13701087609, updateTime=1757489711911, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1172560095704662894, tenantId=1146029695717560320, journalId=1152916057816748034, issueId=1172525471628673796, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1172560095704662895, tenantId=1146029695717560320, journalId=1152916057816748034, issueId=1172525471628673796, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=497, endPage=507, ext={EN=ArticleExt(id=1172525475525177816, articleId=1172525475340628438, tenantId=1146029695717560320, journalId=1152916057816748034, language=EN, title=Rollback Strategy for Remote Automotive ECU Upgrades Based on Improved Differential Algorithm, columnId=1165621800806396415, journalTitle=Chinese Journal of Automotive Engineering, columnName=Intelligent & Connected Technologies Section/Editor in Chief:GAO Zhenhai, runingTitle=null, highlight=null, articleAbstract=
To address the inefficiency and weak robustness of existing rollback methods when a remote update of automotive ECU fails, this paper designs an efficient and stable upgrade rollback strategy. Firstly, an optimized rollback backup method and a comprehensive security-verification strategy are proposed to enhance rollback stability. Then, to avoid the long duration of traditional full rollback, a differential rollback technique based on an improved Bsdiff algorithm is proposed. The improved algorithm can significantly increase rollback efficiency by using the higher-ratio LZMA2 (Lempel-Ziv-Markov chain-Algorithm 2) compression and optimizing the patch format. Finally, the proposed strategy is tested on real-vehicles. The results show that the rollback strategy using the improved differential algorithm reduces rollback time by 84.69%, and achieves a 100% test-case pass rate. The proposed strategy preserves vehicle functionality when an ECU upgrade fails while improving rollback efficiency.
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针对汽车ECU远程升级失败时,现有回滚方法效率低下、鲁棒性弱的问题,设计了一种高效且稳定的升级回滚策略。提出优化的回滚备份方法和完备的安全校验策略,以提升回滚过程的稳定性。考虑传统全量回滚耗时较长,提出采用改进Bsdiff差分算法的差分回滚技术,利用压缩性能更高的LZMA2压缩算法,并优化差分包的数据格式,显著提升回滚效率。在实车上对所设计的策略进行测试,结果表明,采用改进差分算法的回滚策略能将回滚时间缩短84.69%,测试用例通过率为100%,确保汽车ECU在升级失败时车辆功能不受影响,同时提高了回滚效率。
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 |
| 胡杰(1984-),男,湖南永州人,博士,教授,主要研究方向为汽车控制与诊断、车联网与大数据、智能驾驶与智能底盘。 E-mail:auto_hj@163.com |
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1, 2, 3, address=
1 Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China
2 Hubei Technology Research Center of New Energy and Intelligent Connected Vehicle Engineering,Wuhan 430070,China
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1 武汉理工大学 现代汽车零部件技术湖北省重点实验室,武汉 430070
2 新能源与智能网联汽车湖北省工程技术研究中心,武汉 430070
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胡杰(1984-),男,湖南永州人,博士,教授,主要研究方向为汽车控制与诊断、车联网与大数据、智能驾驶与智能底盘。 E-mail:auto_hj@163.com
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胡杰(1984-),男,湖南永州人,博士,教授,主要研究方向为汽车控制与诊断、车联网与大数据、智能驾驶与智能底盘。 E-mail:auto_hj@163.com
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1 Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China
2 Hubei Technology Research Center of New Energy and Intelligent Connected Vehicle Engineering,Wuhan 430070,China
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1 武汉理工大学 现代汽车零部件技术湖北省重点实验室,武汉 430070
2 新能源与智能网联汽车湖北省工程技术研究中心,武汉 430070
3 武汉理工大学 人工智能与新能源汽车现代产业学院,武汉 430070, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1175522497681306398, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, xref=1, ext=[AuthorCompanyExt(id=1175522497685500703, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, companyId=1175522497681306398, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1 武汉理工大学 现代汽车零部件技术湖北省重点实验室,武汉 430070)]), AuthorCompany(id=1175522497735832353, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, xref=2, ext=[AuthorCompanyExt(id=1175522497740026658, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, companyId=1175522497735832353, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1 Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,China
2 Hubei Technology Research Center of New Energy and Intelligent Connected Vehicle Engineering,Wuhan 430070,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1175522498465641279, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, authorId=1175522498348200763, language=CN, stringName=徐文才, firstName=文才, middleName=null, lastName=徐, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
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1 武汉理工大学 现代汽车零部件技术湖北省重点实验室,武汉 430070
2 新能源与智能网联汽车湖北省工程技术研究中心,武汉 430070, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1175522497681306398, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, xref=1, ext=[AuthorCompanyExt(id=1175522497685500703, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, companyId=1175522497681306398, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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1 武汉理工大学 现代汽车零部件技术湖北省重点实验室,武汉 430070)]), AuthorCompany(id=1175522497735832353, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, xref=2, ext=[AuthorCompanyExt(id=1175522497740026658, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, companyId=1175522497735832353, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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4, address=
4 Dongfeng Motor Corporation Research & Development Institute,Wuhan 430058,China, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null), CN=AuthorExt(id=1175522498696328004, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, authorId=1175522498511778625, language=CN, stringName=岳意娥, firstName=意娥, middleName=null, lastName=岳, prefix=null, suffix=null, authorComment=null, nameInitials=null, affiliation=null, department=null, xref=
4, address=
4 东风汽车集团有限公司研发总院,武汉 430058, bio=null, bioImg=null, bioContent=null, aboutCorrespAuthor=null)}, companyList=[AuthorCompany(id=1175522497899410217, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, xref=4, ext=[AuthorCompanyExt(id=1175522497903604522, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, companyId=1175522497899410217, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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42(4):1070-1075.(in Chinese), articleTitle=Research on Safety Upgrade Mode of Automotive ECU Based on QNX /Linux, refAbstract=null)], funds=[Fund(id=1175522501498123120, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, awardId=2023CGB005, language=CN, fundingSource=湖北省中央引导地方科技发展专项(2023CGB005), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1175522497681306398, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, xref=1, ext=[AuthorCompanyExt(id=1175522497685500703, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, companyId=1175522497681306398, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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| Bsdiff算法伪代码 |
| 输入:新文件,原文件 输出:差分包 1 qsufort();//生成字典序 2 while scan指针未遍历完新文件 3 len = search();//二分法查找最大匹配长度 4 matchlen();//原文件和新文件完全匹配长度 5 calculate oldscore; 6 if len > oldscore + 8 7 diff string = backward-extension + completely matched area + forward-extension; 8 extra string = completely mismatched area; 9 else continue; 10 end while 11 diff file = {[header],[xi, yj, zk],[diff1, …, diffi], [extra1,…,extraj]}; 12 差分包 = Bzip2[diff file]; |
), ArticleFig(id=1175522500868977511, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, language=CN, label=表1, caption=
Bsdiff算法伪代码
, figureFileSmall=null, figureFileBig=null, tableContent=
| Bsdiff算法伪代码 |
| 输入:新文件,原文件 输出:差分包 1 qsufort();//生成字典序 2 while scan指针未遍历完新文件 3 len = search();//二分法查找最大匹配长度 4 matchlen();//原文件和新文件完全匹配长度 5 calculate oldscore; 6 if len > oldscore + 8 7 diff string = backward-extension + completely matched area + forward-extension; 8 extra string = completely mismatched area; 9 else continue; 10 end while 11 diff file = {[header],[xi, yj, zk],[diff1, …, diffi], [extra1,…,extraj]}; 12 差分包 = Bzip2[diff file]; |
), ArticleFig(id=1175522500940280680, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 改进后的Bsdiff算法伪代码 |
| 输入:新文件,原文件 输出:差分包 1 qsufort();//生成字典序 2 while scan指针未遍历完新文件 3 len = search();//二分法查找最大匹配长度 4 matchlen();//原文件和新文件完全匹配长度 5 calculate oldscore; 6 if len > oldscore + 8 7 diff string = backward-extension + completely matched area + forward-extension; 8 extra string = completely mismatched area; 9 else continue; 10 end while 11 diff file = {[header],[(x1, y1, z1, diff1,extra1)],[…], [(xi, yj, zk, diffi,extraj)]}; 12 差分包 = LZMA2[diff file]; |
), ArticleFig(id=1175522501007389545, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, language=CN, label=表2, caption=
改进后Bsdiff算法伪代码
, figureFileSmall=null, figureFileBig=null, tableContent=
| 改进后的Bsdiff算法伪代码 |
| 输入:新文件,原文件 输出:差分包 1 qsufort();//生成字典序 2 while scan指针未遍历完新文件 3 len = search();//二分法查找最大匹配长度 4 matchlen();//原文件和新文件完全匹配长度 5 calculate oldscore; 6 if len > oldscore + 8 7 diff string = backward-extension + completely matched area + forward-extension; 8 extra string = completely mismatched area; 9 else continue; 10 end while 11 diff file = {[header],[(x1, y1, z1, diff1,extra1)],[…], [(xi, yj, zk, diffi,extraj)]}; 12 差分包 = LZMA2[diff file]; |
), ArticleFig(id=1175522501066109802, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 序号 | 测试点 | 预置条件 | 测试步骤 | 预期结果 |
| 1 | 刷写过程中升级失败 | 云端发布ECU升级任务并配置回滚策略 | 发送1次诊断指令给被升级ECU,触发升级异常 | 触发回滚,ECU升级失败,回滚成功,ECU可按原版本正常工作 |
| 2 | 新版本不可使用 | 1.云端发布ECU升级任务并配置回滚策略 2.配置下发的目标升级版本不能正常使用 | 等待安装失败 | 触发回滚,ECU升级失败,回滚成功,ECU可按原版本正常工作 |
| 3 | 回滚包安全校验 | 1.云端发布ECU升级任务并配置回滚策略 2.云端配置的回滚包为假包 | 发送1次诊断指令给被升级ECU,触发升级异常 | 触发回滚,回滚包校验失败终止本次回滚,请求云端下发新回滚包,二次回滚成功 |
| 4 | 回滚网络异常 | 云端发布ECU升级任务并配置回滚策略 | 1.发送1次诊断指令给被升级ECU,触发升级异常 2.断开车辆网络连接 | 触发回滚,ECU升级失败,回滚成功,ECU可按原版本正常工作 |
), ArticleFig(id=1175522501154190187, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, language=CN, label=表3, caption=
回滚策略测试用例
, figureFileSmall=null, figureFileBig=null, tableContent=
| 序号 | 测试点 | 预置条件 | 测试步骤 | 预期结果 |
| 1 | 刷写过程中升级失败 | 云端发布ECU升级任务并配置回滚策略 | 发送1次诊断指令给被升级ECU,触发升级异常 | 触发回滚,ECU升级失败,回滚成功,ECU可按原版本正常工作 |
| 2 | 新版本不可使用 | 1.云端发布ECU升级任务并配置回滚策略 2.配置下发的目标升级版本不能正常使用 | 等待安装失败 | 触发回滚,ECU升级失败,回滚成功,ECU可按原版本正常工作 |
| 3 | 回滚包安全校验 | 1.云端发布ECU升级任务并配置回滚策略 2.云端配置的回滚包为假包 | 发送1次诊断指令给被升级ECU,触发升级异常 | 触发回滚,回滚包校验失败终止本次回滚,请求云端下发新回滚包,二次回滚成功 |
| 4 | 回滚网络异常 | 云端发布ECU升级任务并配置回滚策略 | 1.发送1次诊断指令给被升级ECU,触发升级异常 2.断开车辆网络连接 | 触发回滚,ECU升级失败,回滚成功,ECU可按原版本正常工作 |
), ArticleFig(id=1175522501208716140, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 测试用例序号 | 测试车①通过率/% | 测试车②通过率/% |
| 1 | 100 | 100 |
| 2 | 100 | 100 |
| 3 | 100 | 100 |
| 4 | 100 | 100 |
), ArticleFig(id=1175522501259047789, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, language=CN, label=表4, caption=
回滚策略测试用例结果统计
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| 测试用例序号 | 测试车①通过率/% | 测试车②通过率/% |
| 1 | 100 | 100 |
| 2 | 100 | 100 |
| 3 | 100 | 100 |
| 4 | 100 | 100 |
), ArticleFig(id=1175522501313573742, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 软件包序号 | 文件大小/MB | 整包回滚时间/s | 原Bsdiff下差分回滚时间/s | 优化后差分回滚时间/s | 相对整包回滚时间缩短率/% | 相对原Bsdiff下差分回滚时间缩短率/% |
| 1 | 10.01 | 36 | 12 | 10 | 72.22 | 16.67 |
| 2 | 32.15 | 101 | 21 | 15 | 85.15 | 28.57 |
| 3 | 522.06 | 958 | 142 | 108 | 88.73 | 23.94 |
| 4 | 944.48 | 1 740 | 201 | 128 | 92.64 | 36.32 |
), ArticleFig(id=1175522501376488303, tenantId=1146029695717560320, journalId=1152916057816748034, articleId=1172525475340628438, language=CN, label=表5, caption=
三种回滚方式回滚时间对比
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| 软件包序号 | 文件大小/MB | 整包回滚时间/s | 原Bsdiff下差分回滚时间/s | 优化后差分回滚时间/s | 相对整包回滚时间缩短率/% | 相对原Bsdiff下差分回滚时间缩短率/% |
| 1 | 10.01 | 36 | 12 | 10 | 72.22 | 16.67 |
| 2 | 32.15 | 101 | 21 | 15 | 85.15 | 28.57 |
| 3 | 522.06 | 958 | 142 | 108 | 88.73 | 23.94 |
| 4 | 944.48 | 1 740 | 201 | 128 | 92.64 | 36.32 |
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