先进算法助力时间敏锐网络在工业的创新发展
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">在2022年3月3日、4日的广州国际工业自动化技术及装备展览会(SIAF)时间<span style="color: black;">敏锐</span>网络(TSN,Time-Sensitive Networking)技术及应用论坛上,华为首席TSN专家陈李昊<span style="color: black;">发布</span>了《工业自动化时间<span style="color: black;">敏锐</span>网络的兼容演进技术》主题演讲,全面阐述了TSN技术<span style="color: black;">状况</span>,介绍了华为在TSN<span style="color: black;">掌控</span>算法上的创新工作,<span style="color: black;">同期</span>就推动TSN在工业网络应用落地,分享了TSN端网协同的<span style="color: black;">方法</span>构想。</span></span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">TSN技术的发展已有17年历史,<span style="color: black;">日前</span>的20余项TSN子技术<span style="color: black;">经过</span>组合<span style="color: black;">能够</span>形成面向工业网络、车载网络、承载网、专业音视频网络等<span style="color: black;">区别</span>垂直行业的<span style="color: black;">处理</span><span style="color: black;">方法</span>。一方面TSN依托于以太、IP生态圈,能为用户<span style="color: black;">供给</span>低成本、大带宽、支持统计复用的网络<span style="color: black;">基本</span><span style="color: black;">设备</span>,并<span style="color: black;">处理</span><span style="color: black;">各样</span>总线、工业以太协议互通难的问题;另一方面,TSN又具备<span style="color: black;">供给</span>有界时延、极低时延、自动化网络配置、高<span style="color: black;">靠谱</span>性等性能<span style="color: black;">优良</span>。<span style="color: black;">因此呢</span>,<span style="color: black;">做为</span>企业向网络化、智能化发展的新型技术,TSN已<span style="color: black;">作为</span>工业网络向下一代演进的共识方向之一,将加速重构工业网络技术体系和产业生态。</span></span></p>
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<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><strong style="color: blue;"><span style="color: black;">TSN的技术关键点:</span></strong></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">◉ 提供多种调度和整形<span style="color: black;">办法</span>,供用户<span style="color: black;">按照</span>场景<span style="color: black;">需要</span>灵活<span style="color: black;">选取</span>。</span></strong><span style="color: black;">除了基于时间门控的整形(Time-Aware Shaping,TAS)这项TSN技术集中的“网红”之外,TSN还<span style="color: black;">供给</span>了绝对优先级(Strict Priority,SP)、基于信用的整形(Credit-based Shaping,CBS)、<span style="color: black;">加强</span>传输<span style="color: black;">选取</span>(Enhanced Transmission Selection,ETS)、异步流量整形(Asynchronous Traffic Shaping,ATS)等调度<span style="color: black;">办法</span>,以及帧抢占(Frame Preemption)等机制。</span></span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><strong style="color: blue;"><span style="color: black;">◉ <span style="color: black;">供给</span>资源管理<span style="color: black;">方法</span>,即针对业务差异化的时延<span style="color: black;">需要</span>进行网络资源预留。</span></strong><span style="color: black;"><span style="color: black;">详细</span>地,网络<span style="color: black;">掌控</span>器上<span style="color: black;">安排</span>TSN<span style="color: black;">掌控</span>算法,在搜集用户特征和<span style="color: black;">需要</span>后,生成调度和整形<span style="color: black;">方法</span>,并下发配置。<span style="color: black;">因此呢</span>,</span><strong style="color: blue;"><span style="color: black;">TSN<span style="color: black;">掌控</span>算法,是实现TSN网络自动配置的关键。</span></strong></span></p>
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<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">华为<span style="color: black;">长时间</span>投入IEEE 802.1 TSN工作组,参与人数、项目关键职位人数、文稿贡献均为</span><strong style="color: blue;"><span style="color: black;">业界领先</span></strong><span style="color: black;">。华为<span style="color: black;">期盼</span>将TSN知识与技术动态,回馈产业界,更好地推进TSN的发展与应用。<span style="color: black;">这次</span>演讲<span style="color: black;">同期</span>介绍了华为在TSN方面的两项关键<span style="color: black;">掌控</span>算法<span style="color: black;">科研</span>:</span><strong style="color: blue;"><span style="color: black;">网络演算规划算法</span></strong><span style="color: black;">与</span><strong style="color: blue;"><span style="color: black;">门控混合编排算法</span><span style="color: black;">。</span></strong></span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">网络演算(Network Calculus)<span style="color: black;">经过</span>对流量特征和网络服务能力进行建模,<span style="color: black;">能够</span>推导出业务流在网络中传输的端到端时延上限,即网络对该业务所能承诺的确定性服务性能。TSN<span style="color: black;">方法</span>中,除了<span style="color: black;">少许</span><span style="color: black;">拥有</span>良好周期性规律的流量外,其它流量的建模依赖于网络演算;前面<span style="color: black;">说到</span>的SP、CBS、ETS、ATS这四种TSN调度<span style="color: black;">办法</span>的服务能力,<span style="color: black;">亦</span>需要<span style="color: black;">经过</span>网络演算进行建模。<span style="color: black;">详细</span><span style="color: black;">运用</span>时,</span><strong style="color: blue;"><span style="color: black;">网络演算规划算法以各用户差异化的时延<span style="color: black;">需要</span>等<span style="color: black;">做为</span>输入,输出<span style="color: black;">关联</span>网络配置参数,</span></strong><span style="color: black;">随后下发到网络设备上。</span></span></p>
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<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">门控编排是实现TSN时间门控<span style="color: black;">方法</span>(即前面提到的TSN网红技术)的关键。<span style="color: black;">针对</span>工业场景,这类<span style="color: black;">方法</span>的<span style="color: black;">重点</span><span style="color: black;">优良</span>在于可为关键工控业务规划专属网络传输时隙,从而<span style="color: black;">供给</span>极低时延和极低抖动的网络服务。华为的</span><strong style="color: blue;"><span style="color: black;">门控混合编排算法,将传统门控编排算法与网络演算规划算法进行了融合创新,支持TSN时间门控和其它TSN调度<span style="color: black;">办法</span>、<span style="color: black;">乃至</span>传统QoS调度的<span style="color: black;">协同</span><span style="color: black;">运用</span>。</span></strong><span style="color: black;"><span style="color: black;">这般</span>在TSN网络中,不仅<span style="color: black;">能够</span>承载多种工控业务,还<span style="color: black;">能够</span><span style="color: black;">同期</span>承载AOI自动光学检测、视频监控、以及其它<span style="color: black;">伴同</span>着智能制造、工厂无线化和OT/IT融合所带来的新业务,并且这些业务各自的时延、带宽<span style="color: black;">需要</span>,在门控混合编排算法的规划下,得到了<span style="color: black;">保证</span>。</span></span></p>
<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">商用级TSN<span style="color: black;">方法</span>需要</span><strong style="color: blue;"><span style="color: black;">端</span></strong><span style="color: black;">和</span><strong style="color: blue;"><span style="color: black;">网</span></strong><span style="color: black;">协同工作。工业自动化网络是TSN最重要的应用场景之一,然而用户不可能<span style="color: black;">短期</span>内替换掉海量的、尚不支持TSN的工业终端。<span style="color: black;">日前</span>华为聚焦于TSN端网协同<span style="color: black;">方法</span>,尤其是TSN中间件的<span style="color: black;">科研</span>。中间件<span style="color: black;">经过</span>识别终端业务意图,转化为TSN标准语言并<span style="color: black;">经过</span>用户网络接口传递给网络<span style="color: black;">掌控</span>器,正是</span><strong style="color: blue;"><span style="color: black;">实现存量端设备向TSN兼容演进</span></strong><span style="color: black;">的关键。<span style="color: black;">期盼</span>由此为工业用户<span style="color: black;">处理</span>TSN在成本与易用性方面的“后顾之忧”。</span></span></p>
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<p style="font-size: 16px; color: black; line-height: 40px; text-align: left; margin-bottom: 15px;"><span style="color: black;"><span style="color: black;">去年9月,华为CloudEngine S6730-H系列交换机荣获信通院<span style="color: black;">颁布</span>的首批“时间<span style="color: black;">敏锐</span>网络产业链名录计划”测试认证证书。<span style="color: black;">将来</span>,华为将继续<span style="color: black;">奋斗</span>推动TSN的应用落地和产业壮大,为我国工业企业进行网络化改造与智能化升级<span style="color: black;">供给</span>有力的支持,并<span style="color: black;">连续</span>打造以“</span><strong style="color: blue;"><span style="color: black;">工业设备网联化、联接IP化、网络智能化</span></strong><span style="color: black;">”为特征的先进工业网络<span style="color: black;">处理</span><span style="color: black;">方法</span>,与产业伙伴<span style="color: black;">一块</span>,助力客户的数字化转型成功。</span></span></p>
“板凳”(第三个回帖的人) “板凳”(第三个回帖的人)
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