{"id":625,"date":"2025-11-27T16:07:02","date_gmt":"2025-11-27T08:07:02","guid":{"rendered":"https:\/\/www.ndnlab.com\/?p=625"},"modified":"2025-11-27T21:38:32","modified_gmt":"2025-11-27T13:38:32","slug":"prete-traffic-engineering-with-predictive-failures","status":"publish","type":"post","link":"https:\/\/www.ndnlab.com\/?p=625","title":{"rendered":"PreTE: Traffic Engineering with Predictive Failures"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">PreTE\uff1a\u4e3a WAN \u6ce8\u5165\u201c\u9884\u6d4b\u667a\u6167\u201d\u7684\u4e0b\u4e00\u4ee3\u6d41\u91cf\u5de5\u7a0b\u65b9\u6848<\/h2>\n\n\n\n<div class=\"wp-block-group\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>        \u5728\u5f53\u4eca\u4e91\u670d\u52a1\u3001\u9ad8\u6027\u80fd\u8ba1\u7b97\u3001\u5168\u7403\u6570\u636e\u4e2d\u5fc3\u4e92\u8054\u4e0d\u65ad\u6269\u5f20\u7684\u65f6\u4ee3\uff0c\u5e7f\u57df\u7f51 (WAN) \u5df2\u6210\u4e3a\u627f\u8f7d\u6d77\u91cf\u6570\u636e\u6d41\u91cf\u7684\u9aa8\u5e72\u57fa\u7840\u8bbe\u65bd\u3002\u5149\u7ea4\u94fe\u8def\u4ee5\u5176\u9ad8\u5e26\u5bbd\u3001\u4f4e\u5ef6\u8fdf\u7684\u4f18\u52bf\u88ab\u5e7f\u6cdb\u91c7\u7528 \u2014\u2014 \u4f46\u540c\u65f6\uff0c\u5b83\u4eec\u4e5f\u66b4\u9732\u5728\u65bd\u5de5\u8bef\u5207\u3001\u5730\u8d28\u6d3b\u52a8\u3001\u8bbe\u5907\u8001\u5316\u7b49\u5bfc\u81f4\u201c\u5149\u7ea4\u65ad\u88c2 (fiber-cut)\u201d\u7684\u73b0\u5b9e\u98ce\u9669\u4e4b\u4e2d\u3002\u4f20\u7edf WAN \u7684\u6d41\u91cf\u5de5\u7a0b (TE) \u65b9\u6cd5\uff0c\u8981\u4e48\u4f9d\u8d56 <strong>\u9759\u6001\uff0f\u6982\u7387\u6027\u6545\u969c\u6a21\u578b<\/strong> \u4ee5\u9884\u7559\u5197\u4f59\uff0c\u4f46\u8fd9\u4f1a\u5bfc\u81f4\u8d44\u6e90\u5229\u7528\u7387\u4e0d\u9ad8\uff1b\u8981\u4e48\u8d70 <strong>\u6545\u969c\u53d1\u751f \u2192 \u518d\u6062\u590d (reactive reroute)<\/strong> \u7684\u8def\u5f84\uff0c\u8fd9\u610f\u5473\u7740\u4e00\u65e6\u65ad\u88c2\u53d1\u751f\uff0c\u5c31\u53ef\u80fd\u51fa\u73b0\u5927\u89c4\u6a21\u4e22\u5305\u3001\u670d\u52a1\u4e2d\u65ad\u4e0e\u7528\u6237\u4f53\u9a8c\u707e\u96be\u3002PreTE \u7684\u51fa\u73b0\uff0c\u4e3a\u8fd9\u4e00\u201c\u9ad8\u541e\u5410 vs \u9ad8\u53ef\u7528\u6027\u201d\u7684\u7ecf\u5178\u77db\u76fe\u5e26\u6765\u4e86\u65b0\u7684\u7b54\u6848 \u2014\u2014 \u5b83\u5c06 <strong>\u201c\u6545\u969c\u9884\u6d4b (failure prediction)\u201d<\/strong> <strong>\u4e3b\u52a8\u5d4c\u5165 TE \u63a7\u5236\u5faa\u73af\u4e2d<\/strong>\uff0c\u901a\u8fc7\u76d1\u6d4b\u5149\u5b66\u94fe\u8def\u7684\u5fae\u5f31\u52a3\u5316\u4fe1\u53f7 (degradation) \u6765\u9884\u5224\u53ef\u80fd\u53d1\u751f\u7684\u65ad\u88c2\uff0c\u5e76 <strong>\u63d0\u524d\u5efa\u7acb\u5907\u7528\u901a\u9053 (backup tunnels)<\/strong>\u3001\u91cd\u65b0\u4f18\u5316\u6d41\u91cf\u5206\u914d\uff0c\u4ece\u800c\u517c\u987e <strong>\u9ad8\u8d44\u6e90\u5229\u7528\u7387<\/strong> \u4e0e <strong>\u9ad8\u7f51\u7edc\u53ef\u7528\u6027 \/ \u53ef\u6062\u590d\u6027<\/strong>\u3002\u7b80\u800c\u8a00\u4e4b\uff0cPreTE \u4e0d\u662f\u4f20\u7edf\u7684\u201c\u88ab\u52a8\u7b49\u5f85\u6545\u969c\u518d\u8865\u6551\u201d\uff0c\u800c\u662f <strong>\u201c\u5728\u6545\u969c\u771f\u6b63\u53d1\u751f\u524d\uff0c\u5c31\u5df2\u7ecf\u51c6\u5907\u597d\u4e86\u6062\u590d\u65b9\u6848\u201d<\/strong>\u3002\u5728\u751f\u4ea7\u7ea7 WAN \u6d4b\u8bd5\u5e73\u53f0\u548c\u5927\u89c4\u6a21\u6a21\u62df\u5b9e\u9a8c\u4e2d\uff0cPreTE \u7684\u8868\u73b0\u4ee4\u4eba\u77a9\u76ee\u2014\u2014\u5728\u4fdd\u6301\u4e0e\u4f20\u7edf TE \u76f8\u540c\u53ef\u7528\u6027\u7684\u524d\u63d0\u4e0b\uff0c\u5b83\u80fd\u652f\u6301 <strong>\u9ad8\u8fbe 2\u00d7 \u7684\u6d41\u91cf\u9700\u6c42 (demand)<\/strong>\uff0c\u663e\u8457\u63d0\u5347\u7f51\u7edc\u541e\u5410\u4e0e\u8d44\u6e90\u5229\u7528\u6548\u7387\u3002\u5bf9\u4e8e\u4e91\u670d\u52a1\u5546\u3001ISP\u3001\u6570\u636e\u4e2d\u5fc3\u8fd0\u8425\u5546\uff0c\u4ee5\u53ca\u5e7f\u57df\u7f51\u7814\u7a76\u8005\u800c\u8a00\uff0cPreTE \u63d0\u4f9b\u4e86\u4e00\u6761\u517c\u987e <strong>\u6548\u7387\u3001\u53ef\u9760\u4e0e\u667a\u80fd<\/strong> \u7684\u53ef\u884c\u8def\u5f84\u3002\u968f\u7740\u672a\u6765\u5149\u5b66\u94fe\u8def\u76d1\u63a7 (telemetry) \u6280\u672f\u4e0e\u6545\u969c\u9884\u6d4b\/\u68c0\u6d4b\u6a21\u578b\u7684\u53d1\u5c55\uff0c\u7c7b\u4f3c PreTE \u7684\u201c\u9884\u6d4b\u5f0f TE\u201d\u89e3\u51b3\u65b9\u6848\uff0c\u6709\u671b\u6210\u4e3a WAN \u8fd0\u7ef4\u4e0e\u8bbe\u8ba1\u7684\u65b0\u6807\u51c6\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">PreTE \u7684\u4e3b\u8981\u521b\u65b0\u70b9\uff1a<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c06\u201c\u52a8\u6001\u6545\u969c\u9884\u6d4b (fiber-cut failure probability)\u201d \u5f15\u5165 TE \u63a7\u5236\u5faa\u73af\u3002PreTE \u4f7f\u7528\u5bf9\u5149\u7ea4\u94fe\u8def\u7684\u5b9e\u65f6 \/ \u9ad8\u9891\u7387\u5149\u5b66\u5c42\u76d1\u6d4b (optical-layer telemetry)\uff0c\u68c0\u6d4b\u94fe\u8def\u52a3\u5316 (degradation) \u4fe1\u53f7\uff0c\u5e76\u636e\u6b64\u8ba1\u7b97\u94fe\u8def\u201c\u5f53\u524d + \u672a\u6765\u201d\u65ad\u88c2\u6982\u7387 (failure probability)\uff0c\u4f7f TE \u4e0d\u518d\u4f7f\u7528\u9759\u6001\uff0f\u7ecf\u9a8c\u6982\u7387\uff0c\u800c\u662f\u57fa\u4e8e\u94fe\u8def\u5f53\u524d\u72b6\u6001\u4e0e\u8d8b\u52bf\u505a\u51fa\u5224\u65ad\u3002<\/li>\n\n\n\n<li>\u6df7\u5408 (hybrid) TE \u7b56\u7565 \u2014 \u878d\u5408\u4e3b\u52a8 (proactive) \u4e0e\u88ab\u52a8 (reactive) \u4f18\u52bf\uff1a\u5f53\u94fe\u8def\u5065\u5eb7\u3001\u98ce\u9669\u4f4e\u65f6\uff0cPreTE \u5141\u8bb8\u9ad8\u5e26\u5bbd\u5229\u7528\u4e0e\u9ad8\u541e\u5410\uff1b\u5f53\u94fe\u8def\u9884\u6d4b\u6709\u8f83\u9ad8\u5931\u8d25\u98ce\u9669\u65f6\uff0cPreTE \u4f1a <strong>\u63d0\u524d\u6784\u9020\u5907\u7528\u901a\u9053 (backup tunnels)<\/strong> \u5e76\u91cd\u65b0\u5206\u914d\u6d41\u91cf\uff0c\u4ece\u800c\u5728\u6545\u969c\u53ef\u80fd\u53d1\u751f\u524d\u5b8c\u6210\u201c\u6551\u63f4\u51c6\u5907\u201d\u3002\u8fd9\u79cd\u8bbe\u8ba1\u517c\u987e\u4e86\u8d44\u6e90\u5229\u7528\u7387\u4e0e\u6545\u969c\u6062\u590d\u80fd\u529b\u3002<\/li>\n\n\n\n<li>\u7edf\u4e00\u4f18\u5316 \u2014 \u5728 TE \u4e2d\u540c\u65f6\u8003\u8651\u8d44\u6e90\u5229\u7528\u7387\u3001\u94fe\u8def\u5bb9\u91cf\u3001\u5931\u8d25\u6982\u7387\u4e0e\u5907\u4efd\u901a\u9053\uff1aPreTE \u5c06\u5931\u8d25\u6982\u7387\u4f5c\u4e3a\u8f93\u5165\u53c2\u6570\uff0c\u4e0e\u73b0\u6709\u8def\u5f84\u3001\u5907\u7528\u96a7\u9053 (backup tunnels)\u3001\u94fe\u8def\u5bb9\u91cf\u7b49\u4e00\u8d77\uff0c\u7eb3\u5165\u7edf\u4e00\u4f18\u5316\u6a21\u578b (traffic allocation + tunnel configuration optimization)\uff0c\u4f18\u5316\u76ee\u6807\u662f\u5728\u4fdd\u969c\u9ad8\u53ef\u7528\u6027\u7684\u540c\u65f6\u6700\u5927\u5316\u7f51\u7edc\u541e\u5410\uff0f\u8d44\u6e90\u5229\u7528\u3002<\/li>\n\n\n\n<li>\u5b9e\u7528\u6027 \u2014 \u53ef\u90e8\u7f72\u4e8e\u5927\u89c4\u6a21\u751f\u4ea7\u7ea7 WAN\uff1a\u4f5c\u8005\u5728\u751f\u4ea7\u7ea7 WAN \u6d4b\u8bd5\u5e73\u53f0 + \u5927\u89c4\u6a21\u4eff\u771f\u4e2d\u9a8c\u8bc1 PreTE\u3002\u5b9e\u9a8c\u7ed3\u679c\u8868\u660e\uff0c\u5728\u4e0e\u73b0\u6709 TE \u4fdd\u6301\u540c\u7b49\u53ef\u7528\u6027 (availability) \u7684\u524d\u63d0\u4e0b\uff0cPreTE \u652f\u6301\u7ea6 2\u00d7 \u66f4\u9ad8\u7684\u6d41\u91cf\u9700\u6c42 (demand)\uff0c\u8bf4\u660e\u8fd9\u79cd\u201c\u9884\u6d4b + \u4f18\u5316 + \u9884\u6784\u901a\u9053 + \u6d41\u91cf\u5206\u914d\u201d \u7684\u65b9\u6848\u5177\u6709\u5b9e\u9645\u90e8\u7f72\u4ef7\u503c\u3002<\/li>\n<\/ul>\n<\/div><\/div>\n\n\n\n<p>          \u5728\u7f51\u7edc\u89c4\u6a21\u4e0e\u6d41\u91cf\u9700\u6c42\u4e0d\u65ad\u6500\u5347\u7684\u4eca\u5929\uff0c\u201c\u901f\u7387\u3001\u5e26\u5bbd\u3001\u89c4\u6a21\u201d\u4e0d\u518d\u662f\u552f\u4e00\u6311\u6218 \u2014\u2014 \u201c\u53ef\u9760\u6027 + \u53ef\u7528\u6027 + \u5f39\u6027\u201d \u6b63\u6210\u4e3a\u51b3\u5b9a\u7f51\u7edc\u8d28\u91cf\u7684\u5173\u952e\u3002PreTE \u7528\u201c\u9884\u6d4b + \u9884\u5907 + \u4f18\u5316\u201d\u7684\u65b9\u5f0f\uff0c\u4e3a\u4f20\u7edf\u7684\u6d41\u91cf\u5de5\u7a0b (TE) \u6ce8\u5165\u201c\u667a\u80fd\u201d\u548c\u201c\u5f39\u6027\u201d\u3002\u5b83\u4e0d\u4ec5\u80fd\u5e2e\u8fd0\u8425\u8005\u66f4\u5145\u5206\u5229\u7528\u8d44\u6e90\uff0c\u4e5f\u80fd\u5728\u6781\u7aef\u60c5\u51b5\u4e0b\u4fdd\u969c\u670d\u52a1\u4e0d\u4e2d\u65ad\u3002\u672a\u6765\uff0c\u968f\u7740\u5149\u5b66\u94fe\u8def\u76d1\u6d4b\u4e0e\u667a\u80fd\u63a7\u5236\u6280\u672f\u8fdb\u4e00\u6b65\u666e\u53ca\uff0c\u50cf PreTE \u8fd9\u6837\u7684\u201c\u9884\u6d4b\u5f0f TE \u7cfb\u7edf\u201d\u6709\u671b\u6210\u4e3a WAN \u8bbe\u8ba1\u4e0e\u67b6\u6784\u7684\u65b0\u5e38\u6001\u3002<\/p>\n\n\n\n<p>\u8bba\u6587\u94fe\u63a5\uff1a<a href=\"https:\/\/dl.acm.org\/doi\/10.1145\/3718958.3750508\">https:\/\/dl.acm.org\/doi\/10.1145\/3718958.3750508<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"937\" height=\"542\" src=\"https:\/\/www.ndnlab.com\/wp-content\/uploads\/2025\/11\/image-32.png\"  class=\"wp-image-651\" srcset=\"https:\/\/www.ndnlab.com\/wp-content\/uploads\/2025\/11\/image-32.png 937w, https:\/\/www.ndnlab.com\/wp-content\/uploads\/2025\/11\/image-32-300x174.png 300w, https:\/\/www.ndnlab.com\/wp-content\/uploads\/2025\/11\/image-32-768x444.png 768w\" sizes=\"auto, (max-width: 937px) 100vw, 937px\" title=\"PreTE: Traffic Engineering with Predictive Failures\u63d2\u56fe\" alt=\"PreTE: Traffic Engineering with Predictive Failures\u63d2\u56fe\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>PreTE\uff1a\u4e3a WAN \u6ce8\u5165\u201c\u9884\u6d4b\u667a\u6167\u201d\u7684\u4e0b\u4e00\u4ee3\u6d41\u91cf\u5de5\u7a0b\u65b9\u6848 \u5728\u5f53\u4eca\u4e91\u670d\u52a1\u3001\u9ad8\u6027\u80fd\u8ba1\u7b97\u3001\u5168\u7403\u6570\u636e\u4e2d\u5fc3\u4e92\u8054\u4e0d\u65ad\u6269\u5f20\u7684\u65f6\u4ee3\uff0c\u5e7f\u57df\u7f51 (WAN) \u5df2\u6210\u4e3a\u627f\u8f7d\u6d77\u91cf\u6570\u636e\u6d41\u91cf\u7684\u9aa8\u5e72\u57fa\u7840\u8bbe\u65bd\u3002\u5149\u7ea4\u94fe\u8def\u4ee5\u5176\u9ad8\u5e26\u5bbd\u3001\u4f4e\u5ef6\u8fdf\u7684\u4f18\u52bf\u88ab\u5e7f\u6cdb\u91c7\u7528 \u2014\u2014 \u4f46\u540c\u65f6\uff0c\u5b83\u4eec\u4e5f\u66b4\u9732\u5728\u65bd\u5de5\u8bef\u5207\u3001\u5730\u8d28\u6d3b\u52a8\u3001\u8bbe\u5907\u8001\u5316\u7b49\u5bfc\u81f4\u201c\u5149\u7ea4\u65ad\u88c2 (fiber-cut)\u201d\u7684\u73b0\u5b9e\u98ce\u9669\u4e4b\u4e2d\u3002\u4f20\u7edf WAN \u7684\u6d41\u91cf\u5de5\u7a0b (TE) \u65b9\u6cd5\uff0c\u8981\u4e48\u4f9d\u8d56 \u9759\u6001\uff0f\u6982\u7387\u6027\u6545\u969c\u6a21\u578b \u4ee5\u9884\u7559\u5197\u4f59\uff0c\u4f46\u8fd9\u4f1a\u5bfc\u81f4\u8d44\u6e90\u5229\u7528\u7387\u4e0d\u9ad8\uff1b\u8981\u4e48\u8d70 \u6545\u969c\u53d1\u751f \u2192 \u518d\u6062\u590d (r &hellip; <a href=\"https:\/\/www.ndnlab.com\/?p=625\">\u7ee7\u7eed\u9605\u8bfb <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":3,"featured_media":651,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6],"tags":[],"class_list":["post-625","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-weilaiwangluo"],"_links":{"self":[{"href":"https:\/\/www.ndnlab.com\/index.php?rest_route=\/wp\/v2\/posts\/625","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ndnlab.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ndnlab.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ndnlab.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ndnlab.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=625"}],"version-history":[{"count":8,"href":"https:\/\/www.ndnlab.com\/index.php?rest_route=\/wp\/v2\/posts\/625\/revisions"}],"predecessor-version":[{"id":652,"href":"https:\/\/www.ndnlab.com\/index.php?rest_route=\/wp\/v2\/posts\/625\/revisions\/652"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ndnlab.com\/index.php?rest_route=\/wp\/v2\/media\/651"}],"wp:attachment":[{"href":"https:\/\/www.ndnlab.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=625"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ndnlab.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=625"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ndnlab.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=625"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}