Article(id=1200070664204943803, tenantId=1146029695717560320, journalId=1189918454225211397, issueId=1200070652918072201, articleNumber=null, orderNo=null, doi=10.20104/j.cnki.1674-6546.20230204, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=null, receivedDateStr=null, revisedDate=1721664000000, revisedDateStr=2024-07-23, acceptedDate=null, acceptedDateStr=null, onlineDate=1764048742581, onlineDateStr=2025-11-25, pubDate=1731600000000, pubDateStr=2024-11-15, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1764048742581, onlineIssueDateStr=2025-11-25, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1764048742581, creator=13701087609, updateTime=1764048742581, updator=13701087609, issue=Issue{id=1200070652918072201, tenantId=1146029695717560320, journalId=1189918454225211397, year='2024', volume='', issue='11', pageStart='1', pageEnd='48', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1764048739890, creator=13701087609, updateTime=1764049437840, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200073580382879882, tenantId=1146029695717560320, journalId=1189918454225211397, issueId=1200070652918072201, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200073580382879883, tenantId=1146029695717560320, journalId=1189918454225211397, issueId=1200070652918072201, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=1, endPage=6, ext={EN=ArticleExt(id=1200070664532099537, articleId=1200070664204943803, tenantId=1146029695717560320, journalId=1189918454225211397, language=EN, title=Research on Upgrading Technology of A/B System Based on Vehicle SoC Controller, columnId=null, journalTitle=Automotive Engineer, columnName=null, runingTitle=null, highlight=null, articleAbstract=
The A/B system upgrading technology is proposed to solve the problem that the System on Chip (SoC) Electronic Control Unit (ECU) cannot roll back the software when the Over-The-Air (OTA) upgrading failed. The technology downloads the program to the backup slot by reading the MISC of ECU slot information, and starts the installation by designing the priority level of the A/B system to select the active partition or rolls back the software in case of upgrading failed. At the same time, the differential graded technology of A/B system is designed. The ECU using this technology can perform software rollback when upgrading fails,and the feasibility, effectiveness and stability of rolling back software technology are verified by building a test environment.
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针对空中下载(OTA)升级失败时单片系统(SoC)电子控制单元(ECU)无法进行软件回滚的问题,提出了一种A/B系统升级技术,通过读取ECU中杂项(MISC)分区信息,将程序下载至备份分区,并通过设计A/B系统的优先级来选择激活分区,进行安装启动或安装失败时软件回滚,同时,设计了A/B系统的差分升级技术。经搭建系统测试,采用该技术的控制器在升级失败后可进行软件回滚,验证了回滚技术的可行性、有效性及稳定性。
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2022(9): 29-30+32., articleTitle=Design of Lightweight Online Differential Update Strategy, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1200070669389103776, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, xref=null, ext=[AuthorCompanyExt(id=1200070669414269601, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, companyId=1200070669389103776, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Global R&D Center, China FAW Corporation Limited, Changchun 130013), AuthorCompanyExt(id=1200070669435241127, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, companyId=1200070669389103776, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=中国第一汽车股份有限公司研发总院, 长春 130013)])], figs=[ArticleFig(id=1200070674090918760, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=EN, label=null, caption=null, figureFileSmall=9v0CmkrvOTFG2W5FDvD1sw==, figureFileBig=WbpYTc5lWeDpD+4b32w9Gw==, tableContent=null), ArticleFig(id=1200070674191582062, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=CN, label=图1, caption=
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MISC分区属性信息结构, figureFileSmall=RauUszXUTcpHY0hX9Nhi7w==, figureFileBig=3YAm/yYXgl6UkeWwfS4lgA==, tableContent=null), ArticleFig(id=1200070674652955521, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=EN, label=null, caption=null, figureFileSmall=is5h45W0981iI8x9MEWSjA==, figureFileBig=by4dNeUTjH/cUuZsgHLnOw==, tableContent=null), ArticleFig(id=1200070674774590341, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=CN, label=图3, caption=
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差分升级原理, figureFileSmall=bYZOqhMjOmQHUbNlJVjekQ==, figureFileBig=2LcrbSr0yfA5U9NDIg8Miw==, tableContent=null), ArticleFig(id=1200070675147883407, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=EN, label=null, caption=null, figureFileSmall=t75l35/6+e+zDZf+GS7qWg==, figureFileBig=w8nk6Zg6yQqB8HjXeD66Dg==, tableContent=null), ArticleFig(id=1200070675244352404, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=CN, label=图5, caption=
A/B系统升级包下载刷写流程, figureFileSmall=t75l35/6+e+zDZf+GS7qWg==, figureFileBig=w8nk6Zg6yQqB8HjXeD66Dg==, tableContent=null), ArticleFig(id=1200070675378570135, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=EN, label=null, caption=null, figureFileSmall=FC51mrgBeXTLOcm/TRbL3w==, figureFileBig=TEwtDWn7Ki2pcbpZjC9Xbw==, tableContent=null), ArticleFig(id=1200070675508593566, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=CN, label=图6, caption=
A/B系统下载刷写阶段Slot_Info属性变化, figureFileSmall=FC51mrgBeXTLOcm/TRbL3w==, figureFileBig=TEwtDWn7Ki2pcbpZjC9Xbw==, tableContent=null), ArticleFig(id=1200070675609256864, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=EN, label=null, caption=null, figureFileSmall=9sCPipnqORDuJ9WU8JodKA==, figureFileBig=0dO8oVUzKd2kNGsGap6ecA==, tableContent=null), ArticleFig(id=1200070675714114470, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=CN, label=图7, caption=
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A/B系统升级成功后Slot属性变化, figureFileSmall=nN+UKLayO+SuLL8y0op+Qw==, figureFileBig=5ypTqg5UrIWGvTMXLzdhGw==, tableContent=null), ArticleFig(id=1200070676011910067, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=EN, label=null, caption=null, figureFileSmall=KYxZ6A2cFyPg3VpZF1E0VQ==, figureFileBig=eShoCVHXw4Inof+t0kC+pA==, tableContent=null), ArticleFig(id=1200070676171293621, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=CN, label=图9, caption=
A/B系统回滚时Slot属性变化, figureFileSmall=KYxZ6A2cFyPg3VpZF1E0VQ==, figureFileBig=eShoCVHXw4Inof+t0kC+pA==, tableContent=null), ArticleFig(id=1200070676271956922, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=EN, label=null, caption=null, figureFileSmall=CtndpAaAsoeqb0EX3XJ2Tg==, figureFileBig=zrG0D2Z9mvhKJaymNQUXEQ==, tableContent=null), ArticleFig(id=1200070677417001916, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=CN, label=图10, caption=
A/B系统差分升级流程, figureFileSmall=CtndpAaAsoeqb0EX3XJ2Tg==, figureFileBig=zrG0D2Z9mvhKJaymNQUXEQ==, tableContent=null), ArticleFig(id=1200070677534442430, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=EN, label=null, caption=null, figureFileSmall=V5DL673vEf8V3SG7tr2Eyw==, figureFileBig=4yZZBQss2GAkEeKFjIhacw==, tableContent=null), ArticleFig(id=1200070677647688640, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=CN, label=图11, caption=
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A/B系统升级测试实物图, figureFileSmall=EbnGc+n4ghp+bsYHm86bkg==, figureFileBig=ur2p7I7Ym8tL5Z3JV4DGGg==, tableContent=null), ArticleFig(id=1200070678058730450, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 分区名 | 功能 |
| 引导(Boot) | 存放内核(Kernel)和内存盘(Ramdisk) |
| 恢复(Recovery) | 存放Recovery系统的Kernel和Ramdisk |
| 系统(System) | 存放平台的进程和库文件 |
| 缓存(Cache) | 存放缓存文件和数据 |
开发厂商 (Vendor) | 存放开发厂商定制的应用和库文件 |
| 数据(Data) | 用户数据分区 |
| 杂项(MISC) | 系统与Recovery、Bootloader通信数据 |
), ArticleFig(id=1200070678180365268, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=CN, label=表1, caption=
传统控制器分区及功能
, figureFileSmall=null, figureFileBig=null, tableContent=
| 分区名 | 功能 |
| 引导(Boot) | 存放内核(Kernel)和内存盘(Ramdisk) |
| 恢复(Recovery) | 存放Recovery系统的Kernel和Ramdisk |
| 系统(System) | 存放平台的进程和库文件 |
| 缓存(Cache) | 存放缓存文件和数据 |
开发厂商 (Vendor) | 存放开发厂商定制的应用和库文件 |
| 数据(Data) | 用户数据分区 |
| 杂项(MISC) | 系统与Recovery、Bootloader通信数据 |
), ArticleFig(id=1200070678293611478, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 分区名 | 功能 |
| Boot_a/Boot_b | 存放Kernel和Ramdisk |
| System_a/System_b | 存放应用程序和库文件 |
| Vendor_a/Vendor_b | 存放定制应用和库文件 |
| Data | 用户数据分区 |
| MISC | 存放A/B系统关键信息 |
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A/B系统控制器分区及功能
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| 分区名 | 功能 |
| Boot_a/Boot_b | 存放Kernel和Ramdisk |
| System_a/System_b | 存放应用程序和库文件 |
| Vendor_a/Vendor_b | 存放定制应用和库文件 |
| Data | 用户数据分区 |
| MISC | 存放A/B系统关键信息 |
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| 内容 | 功能 |
引导控制后缀 (bootctrl_suffix) | 当前系统字符串标记位 |
| 魔术字(magic) | 标识引导加载程序控制(bootloader_control)类型 |
| 版本(version) | 引导信息(BootInfo)版本号 |
| 激活(active) | Slot_Info中为active的Slot号 |
| 启动信息(Slot_Info) | Slot属性信息 |
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bootloader_control结构说明
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| 内容 | 功能 |
引导控制后缀 (bootctrl_suffix) | 当前系统字符串标记位 |
| 魔术字(magic) | 标识引导加载程序控制(bootloader_control)类型 |
| 版本(version) | 引导信息(BootInfo)版本号 |
| 激活(active) | Slot_Info中为active的Slot号 |
| 启动信息(Slot_Info) | Slot属性信息 |
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| 内容 | 功能 |
| 可引导(bootable) | 表示当前分区是否包含正确引导程序 |
| 激活(active) | 表示当前分区为首选的启动引导 |
| 成功引导(successful) | 标记当前分区是否已正确引导系统启动 |
| 重试次数(retry_count) | 最大尝试次数 |
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Slot_Info结构说明
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| 内容 | 功能 |
| 可引导(bootable) | 表示当前分区是否包含正确引导程序 |
| 激活(active) | 表示当前分区为首选的启动引导 |
| 成功引导(successful) | 标记当前分区是否已正确引导系统启动 |
| 重试次数(retry_count) | 最大尝试次数 |
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| 优先级 | 内容 |
| 1 | 具备active & bootable & successful属性的Slot |
| 2 | 具备active & bootable & retry_count>0属性的Slot |
| 3 | 具备bootable & successful属性的Slot |
| 4 | 具备bootable属性的Slot |
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A/B系统启动优先级
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| 优先级 | 内容 |
| 1 | 具备active & bootable & successful属性的Slot |
| 2 | 具备active & bootable & retry_count>0属性的Slot |
| 3 | 具备bootable & successful属性的Slot |
| 4 | 具备bootable属性的Slot |
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| 序号 | 名称 | 设备结点 | 功能 |
| 1 | uboot | mmcblk0p1 | 通用引导加载程序 |
| 2 | Verison | mmcblk0p2 | 版本信息 |
| 3 | Boot_a | mmcblk0p3 | 存放内核和内存盘 |
| 4 | Boot_b | mmcblk0p4 | 存放内核和内存盘 |
| 5 | ramdisk_a | mmcblk0p5 | 分区A的内存盘 |
| 6 | ramdisk_b | mmcblk0p6 | 分区B的内存盘 |
| 7 | factory | mmcblk0p7 | 工厂信息 |
| 8 | MISC | mmcblk0p8 | 系统与Recovery、引导加载程序通信数据 |
| 9 | system_a | mmcblk0p9 | 存放应用程序和库文件 |
| 10 | system_b | mmcblk0p10 | 存放应用程序和库文件 |
| 11 | vendor_a | mmcblk0p11 | 存放开发厂商定制的应用和库文件 |
| 12 | vendor_b | mmcblk0p12 | 存放开发厂商定制的应用和库文件 |
| 13 | data | mmcblk0p13 | 用户数据分区 |
| 14 | dtlog | mmcblk0p14 | 存储日志 |
| 15 | otalog | mmcblk0p15 | 存储ota日志 |
| 16 | ota | mmcblk0p16 | 存储ota数据 |
| 17 | bspinfo | mmcblk0p17 | boot模式信息 |
), ArticleFig(id=1200070679220552695, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=CN, label=表6, caption=
eMMC内存分区结构
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| 序号 | 名称 | 设备结点 | 功能 |
| 1 | uboot | mmcblk0p1 | 通用引导加载程序 |
| 2 | Verison | mmcblk0p2 | 版本信息 |
| 3 | Boot_a | mmcblk0p3 | 存放内核和内存盘 |
| 4 | Boot_b | mmcblk0p4 | 存放内核和内存盘 |
| 5 | ramdisk_a | mmcblk0p5 | 分区A的内存盘 |
| 6 | ramdisk_b | mmcblk0p6 | 分区B的内存盘 |
| 7 | factory | mmcblk0p7 | 工厂信息 |
| 8 | MISC | mmcblk0p8 | 系统与Recovery、引导加载程序通信数据 |
| 9 | system_a | mmcblk0p9 | 存放应用程序和库文件 |
| 10 | system_b | mmcblk0p10 | 存放应用程序和库文件 |
| 11 | vendor_a | mmcblk0p11 | 存放开发厂商定制的应用和库文件 |
| 12 | vendor_b | mmcblk0p12 | 存放开发厂商定制的应用和库文件 |
| 13 | data | mmcblk0p13 | 用户数据分区 |
| 14 | dtlog | mmcblk0p14 | 存储日志 |
| 15 | otalog | mmcblk0p15 | 存储ota日志 |
| 16 | ota | mmcblk0p16 | 存储ota数据 |
| 17 | bspinfo | mmcblk0p17 | boot模式信息 |
), ArticleFig(id=1200070679329604604, tenantId=1146029695717560320, journalId=1189918454225211397, articleId=1200070664204943803, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 序号 | 测试内容 | 结果 | 成功率/% |
| 1 | Slot_Info分区信息获取 | 成功 | 100 |
| 2 | 全量升级及差分升级稳定性 | 成功 | 100 |
| 3 | 刷新过程擦除异常断电,版本回滚 | 成功 | 100 |
| 4 | 刷新下载时异常断电,版本回滚 | 成功 | 100 |
| 5 | 刷新异常升级文件,版本回滚 | 成功 | 100 |
| 6 | 上电引导启动分区稳定性 | 成功 | 100 |
| 7 | 引导激活分区程序运行稳定性 | 成功 | 100 |
| 8 | 升级过程超时及负响应版本回滚 | 成功 | 100 |
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A/B系统升级技术测试内容及结果
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| 序号 | 测试内容 | 结果 | 成功率/% |
| 1 | Slot_Info分区信息获取 | 成功 | 100 |
| 2 | 全量升级及差分升级稳定性 | 成功 | 100 |
| 3 | 刷新过程擦除异常断电,版本回滚 | 成功 | 100 |
| 4 | 刷新下载时异常断电,版本回滚 | 成功 | 100 |
| 5 | 刷新异常升级文件,版本回滚 | 成功 | 100 |
| 6 | 上电引导启动分区稳定性 | 成功 | 100 |
| 7 | 引导激活分区程序运行稳定性 | 成功 | 100 |
| 8 | 升级过程超时及负响应版本回滚 | 成功 | 100 |
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