{"id":78,"date":"2017-10-13T15:22:05","date_gmt":"2017-10-13T07:22:05","guid":{"rendered":"http:\/\/www.xzclass.com\/?p=78"},"modified":"2022-03-01T16:40:43","modified_gmt":"2022-03-01T08:40:43","slug":"%e4%b8%80%e6%96%87%e7%9c%8b%e6%87%82lte%e7%9a%84%e9%89%b4%e6%9d%83","status":"publish","type":"post","link":"http:\/\/www.xzclass.com\/?p=78","title":{"rendered":"\u4e00\u6587\u770b\u61c2LTE\u7684\u9274\u6743"},"content":{"rendered":"

\u4eca\u5929\uff0c\u6211\u4eec\u6765\u8bf4\u8bf4LTE\u7684\u9274\u6743\u3002<\/p>\n

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\u5bf9\u4e8e\u4efb\u4f55\u901a\u4fe1\u7cfb\u7edf\uff0c\u5b89\u5168\u90fd\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002<\/p>\n

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\u6211\u4eec\u7ecf\u5e38\u542c\u8bf4\u7684\u590d\u5236\u5361\u3001\u4f2a\u57fa\u7ad9\uff0c\u90fd\u662f\u5bf9\u901a\u4fe1\u7cfb\u7edf\u7684\u5a01\u80c1\uff0c\u5bf9\u6211\u4eec\u4fe1\u606f\u5b89\u5168\u7684\u5a01\u80c1\u3002<\/p>\n

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\u6240\u8c13\u9274\u6743\uff0c\u5c31\u662f\u9274\u522b\u7ec8\u7aef\u6216\u7f51\u7edc\u7684\u771f\u4f2a\uff0c\u4fdd\u8bc1\u901a\u4fe1\u6570\u636e\u7684\u5b89\u5168\uff08\u4e0d\u88ab\u622a\u53d6\u3001\u4e0d\u88ab\u7be1\u6539\u3001\u4e0d\u88ab\u4f2a\u9020\uff09\u3002<\/p>\n

<\/p>\n

\u6211\u4eec\u5c31\u4ee5LTE\u7cfb\u7edf\u4e3a\u4f8b\uff0c\u8bf4\u660e\u4e00\u4e0b\u79fb\u52a8\u901a\u4fe1\u7f51\u7edc\u7684\u9274\u6743\u65b9\u6cd5\u3002<\/p>\n

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\u4e00\u4e2a\u7b80\u5355\u7684LTE\u7f51\u7edc\u67b6\u6784\uff0c\u662f\u4e0b\u9762\u8fd9\u6837\u7684\uff1a<\/p>\n

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LTE\u63a7\u5236\u9762\u7684\u534f\u8bae\u6808\uff0c\u5982\u4e0b\u56fe\uff1a<\/span><\/p>\n

<\/p>\n

\u6b63\u5982\u4e0a\u56fe\u6240\u793a\uff0cLTE\u662f\u4e00\u4e2a\u5206\u5c42\u7684\u901a\u4fe1\u7cfb\u7edf\u3002UE\u548ceNodeB\u4e4b\u95f4\uff0c\u662fRRC\u4fe1\u4ee4\u3002UE\u548cMME\u4e4b\u95f4\uff0c\u662f\u66f4\u4e0a\u5c42\u7684NAS\u4fe1\u4ee4\u3002<\/span><\/p>\n

\u6b63\u56e0\u4e3a\u5982\u6b64\uff0c\u9488\u5bf9\u4e0d\u540c\u4fe1\u4ee4\uff0c\u5c31\u8981\u91c7\u53d6\u4e0d\u540c\u7684\u5b89\u5168\u7ba1\u7406\u5c42\u7ea7\uff0c\u5c31\u662f\u9488\u5bf9AS\u5c42<\/span>\u7684<\/span>AS\u5b89\u5168\uff0c\u4ee5\u53ca\u9488\u5bf9<\/strong>NA<\/span>S\u5c42<\/strong>\u7684<\/span><\/span>NAS\u5b89\u5168<\/strong>\u3002<\/span><\/p>\n

<\/span><\/p>\n

AS\uff08Access Stratum\uff0c\u63a5\u5165\u5c42\uff09<\/strong>\u5b89\u5168<\/strong><\/p>\n

UE\u548ceNB\u4e4b\u95f4\u7684\u5b89\u5168\uff0c\u5305\u62ecRRC\u4fe1\u4ee4\u7684\u673a\u5bc6\u6027\u4fdd\u62a4\u548c\u5b8c\u6574\u6027\u4fdd\u62a4\uff0c\u7528\u6237\u9762\u673a\u5bc6\u6027\u4fdd\u62a4\u3002<\/p>\n

NAS\uff08Non Access Stratum\uff0c\u975e\u63a5\u5165\u5c42\uff09<\/strong>\u5b89\u5168<\/strong><\/p>\n

UE\u548cMME\u4e4b\u95f4\u7684\u5b89\u5168\uff0c\u5305\u62ecNAS\u4fe1\u4ee4\u7684\u673a\u5bc6\u6027\u4fdd\u62a4\u548c\u5b8c\u6574\u6027\u4fdd\u62a4\u3002<\/p>\n

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\u8bf4\u5230\u9274\u6743\uff0c\u5c31\u4e00\u5b9a\u8981\u5148\u77e5\u9053\u4ec0\u4e48\u662f\u9274\u6743\u5411\u91cf\uff08Authentication Vector\uff09<\/strong>\u3002<\/span><\/p>\n


<\/span><\/p>\n

\u9274\u6743\u5411\u91cf\uff0c\u5c31\u662f\u4e00\u7ec4\u7528\u4e8e\u9274\u6743\u7684\u53c2\u6570\u7ec4\u3002<\/p>\n

<\/p>\n

\u8fd9\u4e2a\u53c2\u6570\u7ec4\uff0c\u5305\u62ec4\u4e2a\u53c2\u6570\uff0c\u5206\u522b\u662f\uff1a<\/p>\n

<\/p>\n

RAND\uff08RandomChallenge\uff0c\u968f\u673a\u6570\uff09<\/strong><\/p>\n

RAND\u662f\u7f51\u7edc\u63d0\u4f9b\u7ed9UE\u7684\u4e0d\u53ef\u9884\u77e5\u7684\u968f\u673a\u6570\u3002<\/p>\n

<\/p>\n

AUTN\uff08AuthenticationToken\uff0c\u9274\u6743\u4ee4\u724c\uff09<\/strong><\/p>\n

AUTN\u7684\u4f5c\u7528\u662f\u63d0\u4f9b\u4fe1\u606f\u7ed9UE\uff0c\u4f7fUE\u53ef\u4ee5\u7528\u5b83\u6765\u5bf9\u7f51\u7edc\u8fdb\u884c\u9274\u6743\u3002<\/p>\n

<\/p>\n

XRES\uff08ExpectedResponse\uff0c\u9884\u671f\u54cd\u5e94\uff09<\/strong><\/p>\n

XRES\u662f\u671f\u671b\u7684UE\u9274\u6743\u54cd\u5e94\u53c2\u6570\u3002\u7528\u4e8e\u548cUE\u4ea7\u751f\u7684RES(\u6216RES+RES_EXT)\u8fdb\u884c\u6bd4\u8f83\uff0c\u4ee5\u51b3\u5b9a\u9274\u6743\u662f\u5426\u6210\u529f\u3002<\/p>\n

<\/p>\n

KASME<\/span><\/strong><\/p>\n

KASME<\/span>\u662f\u6839\u636eCK\/IK\u4ee5\u53caASME\u7684PLMNID\u63a8\u6f14\u5f97\u5230\u7684\u4e00\u4e2a\u6839\u5bc6\u94a5\u3002<\/p>\n


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\u8bf4\u660e\uff1a<\/p>\n

1 XRES\u91cc\u9762\u7684X\uff0c\u5c31\u662fExpected\uff0c\u201c\u9884\u671f\u7684<\/span>\u201d\u7684\u610f\u601d\u3002\u540e\u9762\u4f1a\u63d0\u5230\u7684\u597d\u51e0\u4e2a\u8bcd\uff0c\u90fd\u5e26\u6709\u8fd9\u4e2aX\u3002\u201cX\u67d0\u67d0\u67d0<\/span>\u201d\u5c31\u662f\u548c\u201c\u67d0\u67d0\u67d0<\/span>\u201d\u8fdb\u884c\u6bd4\u8f83\u7528\u7684\u3002<\/p>\n

2 \u4ec0\u4e48\u662fASME\uff1f<\/p>\n

ASME\uff0c\u63a5\u5165\u5b89\u5168\u7ba1\u7406\u5b9e\u4f53\u3002\u8be5\u5b9e\u4f53\u662f\u63a5\u5165\u7f51\u4eceHSS\u63a5\u6536\u6700\u9ad8\u7ea7\uff08top-level\uff09\u5bc6\u94a5\u7684\u5b9e\u4f53\u3002\u5728LTE\u7f51\u7edc\u4e0b\uff0cMME\u626e\u6f14ASME\u7684\u89d2\u8272\u3002<\/p>\n<\/section>\n<\/section>\n

\n
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<\/section>\n<\/section>\n<\/section>\n<\/section>\n
\n
\n
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<\/section>\n<\/section>\n<\/section>\n<\/section>\n

\u4e0a\u9762\u8fd94\u4e2a\u53c2\u6570\uff0c\u4e5f\u5c31\u662f\u901a\u5e38\u6211\u4eec\u6240\u8bf4\u7684LTE\u9274\u6743\u56db\u5143\u7ec4<\/strong>\u3002<\/p>\n

<\/p>\n

<\/p>\n

\u6211\u4eec\u8fd8\u662f\u76f4\u63a5\u770b\u770b\u5b8c\u6574\u7684LTE\u9274\u6743\u6d41\u7a0b\uff0c\u5728\u6d41\u7a0b\u4e2d\u89e3\u91ca\u5427\u3002<\/p>\n

<\/p>\n

\u53c2\u4e0e<\/span>\u8ba4\u8bc1\u548c\u5bc6\u94a5\u534f\u5546<\/strong>\u7684\u6709\u8fd9\u4e09\u4e2a\u4e3b\u4f53\uff1a<\/span>UE\u3001MME \u548c HSS<\/strong>\u3002<\/span><\/p>\n


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<\/span><\/p>\n

\u6211\u4eec\u628a\u5b83\u4eec\u62ce\u51fa\u6765\uff1a<\/span><\/p>\n

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<\/span><\/strong><\/p>\n

?\u7b2c\u2460\u6b65<\/span><\/strong><\/p>\n

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<\/p>\n

\u2460\uff1aUE \u5411 MME \u53d1\u9001\u81ea\u5df1\u7684 IMSI \u4e0e HSS \u7684 IDHSS\u6807\u8bc6\u7b49\u8eab\u4efd\u4fe1\u606f\uff0c\u8bf7\u6c42\u63a5\u5165\uff1b<\/p>\n

<\/p>\n

?<\/span>\u7b2c\u2461\u6b65<\/span><\/p>\n

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<\/p>\n

\u2461\uff1aMME \u6839\u636e\u8bf7\u6c42 IDHSS\uff0c\u5411\u5bf9\u5e94\u7684 HSS \u53d1\u9001\u9274\u6743\u6570\u636e\u8bf7\u6c42\uff0c\u5728\u8bf7\u6c42\u4e2d\u5305\u62ec\u6709\u7528\u6237\u7684\u8eab\u4efd\u4fe1\u606f IMSI \u4e0e\u672c\u670d\u52a1\u7f51\u7684\u8eab\u4efd\u4fe1\u606f SNID\uff1b<\/span><\/p>\n


<\/span><\/p>\n

?<\/span>\u7b2c\u2462\u6b65<\/span><\/span><\/p>\n

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<\/p>\n

\u2462\uff1aHSS \u6536\u5230\u9274\u6743\u8bf7\u6c42\u540e\uff0c\u5728\u81ea\u5df1\u7684\u6570\u636e\u5e93\u4e2d\u67e5\u627e IMSI \u4e0e SNID\uff0c\u9a8c\u8bc1\u8fd9 2 \u4e2a\u5b9e\u4f53\u7684\u5408\u6cd5\u6027\u3002\u5982\u679c\u9a8c\u8bc1\u901a\u8fc7\uff0c\u5219\u751f\u6210\u9274\u6743\u5411\u91cf\u7ec4 AV\uff081,\u2026,n\uff09\u3002<\/p>\n

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?<\/span>\u7b2c\u2463\u6b65<\/span><\/p>\n

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<\/p>\n

\u2463\uff1aHSS\u5c06\u751f\u6210\u7684\u9274\u6743\u5411\u91cf\u7ec4 AV\uff081,\u2026,n\uff09\u4f5c\u4e3a\u9274\u6743\u6570\u636e\u54cd\u5e94\uff0c\u53d1\u56de\u7ed9 MME\u3002<\/p>\n

<\/p>\n

\u751f\u6210\u9274\u6743\u5411\u91cf\u7684\u7b97\u6cd5\u5982\u4e0b\uff1a<\/p>\n

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\n
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SQN\u662f\u5565\uff1f<\/p>\n

\u4e3a\u4e86\u62b5\u5fa1\u91cd\u653e\u653b\u51fb\uff0cUE \u548c HSS \u90fd\u5404\u81ea\u7ef4\u6301\u4e00\u4e2a\u5e8f\u5217\u53f7\u8ba1\u6570\u5668 SQN\u3002<\/p>\n

\u5176\u4e2d HSS \u7ef4\u6301\u7684\u662fSQNHSS\u8d1f\u8d23\u4e3a\u6bcf\u4e00\u4e2a\u751f\u6210\u7684 AV \u4ea7\u751f\u4e00\u4e2a\u65b0\u7684\u5e8f\u5217\u53f7 SQN\u3002UE \u7ef4\u6301\u7684\u662fSQNUE\u7528\u4e8e\u4fdd\u5b58\u5df2\u63a5\u6536 AV \u4e2d\u7684\u6700\u5927 SQN \u503c\u3002<\/p>\n

<\/p>\n

KDF\u662f\u5565\uff1f<\/p>\n

\u5bc6\u94a5\u751f\u6210\u51fd\u6570\uff0cKey derivation functions\u3002KDF\u7528\u4e8e\u751f\u6210 Security\u5404\u79cd\u7b97\u6cd5\u7684\u8f93\u5165\u5bc6\u94a5\u3002<\/p>\n<\/section>\n<\/section>\n

\n
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<\/section>\n<\/section>\n<\/section>\n<\/section>\n
\n
\n
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<\/section>\n<\/section>\n<\/section>\n<\/section>\n

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?<\/span>\u7b2c\u2464\u6b65<\/span><\/p>\n

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<\/p>\n

\u2464\uff1aMME \u6536\u5230\u5e94\u7b54\u540e\uff0c\u5b58\u50a8 AV\uff081,\u2026,n\uff09\uff0c\u518d\u4ece\u4e2d\u9009\u62e9\u4e00\u4e2a AV(i)\uff0c\u63d0\u53d6\u51fa RAND(i)\u3001AUTN(i)\u3001KASME<\/span>(i)\u7b49\u6570\u636e\uff0c\u540c\u65f6\u4e3a KASME<\/span>(i)\u5206\u914d\u4e00\u4e2a\u5bc6\u94a5\u6807\u8bc6KSIASME<\/span>(i)\u3002<\/p>\n

?<\/span>\u7b2c\u2465\u6b65<\/span><\/p>\n

<\/span><\/p>\n

<\/p>\n

\u2465\uff1aMME\u5411 UE \u53d1\u9001\u7528\u6237\u8ba4\u8bc1\u8bf7\u6c42\uff0c\u5e26\u6709RAND(i)\u3001AUTN(i)\u3001KASME<\/span>(i)\u7b49\u6570\u636e\uff1b<\/p>\n

<\/p>\n

?<\/span>\u7b2c\u2466\u6b65<\/span><\/p>\n

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<\/p>\n

\u2466\uff1aUE \u6536\u5230\u8ba4\u8bc1\u8bf7\u6c42\u540e\uff0c\u901a\u8fc7\u63d0\u53d6\u548c\u8ba1\u7b97 AUTN(i)\u4e2d\u7684 MAC \u7b49\u4fe1\u606f\uff0c\u8ba1\u7b97XMAC\uff0c\u6bd4\u8f83 XMAC \u548c MAC \u662f\u5426\u76f8\u7b49\uff0c\u540c\u65f6\u68c0\u9a8c\u5e8f\u5217\u53f7 SQN \u662f\u5426\u5728\u6b63\u5e38\u7684\u8303\u56f4\u5185\uff0c\u4ee5\u6b64\u6765\u8ba4\u8bc1\u6240\u63a5\u5165\u7684\u7f51\u7edc\uff1b<\/p>\n

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\u7b97\u6cd5\u5982\u4e0b\uff1a<\/p>\n

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<\/p>\n

\u5982\u679c\u8ba4\u8bc1\u901a\u8fc7\uff0c\u5219\u8ba1\u7b97 RES(i)\u4e0e KASME (i)\u3002<\/p>\n

<\/p>\n

?<\/span>\u7b2c\u2467\u6b65<\/span><\/p>\n

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<\/p>\n

\u2467\uff1aUE\u7ed9MME\u53d1\u7528\u6237\u9274\u6743\u8bf7\u6c42\u54cd\u5e94\u6d88\u606f\uff0c\u5c06\u8ba1\u7b97\u51fa\u7684RES(i)\u4f20\u8f93\u7ed9 MME\u3002<\/p>\n

<\/p>\n

?<\/span>\u7b2c\u2468\u6b65<\/span><\/p>\n

<\/p>\n

\u2468\uff1aMME \u5c06\u6536\u5230\u7684 RES(i)\u4e0e AV(i)\u4e2d\u7684 XRES(i)\u8fdb\u884c\u6bd4\u8f83\uff0c\u5982\u679c\u4e00\u81f4\uff0c\u5219\u901a\u8fc7\u8ba4\u8bc1\uff1b<\/p>\n

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?<\/span>\u7b2c\u2469\u6b65<\/span><\/p>\n

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<\/p>\n

\u2469\uff1a\u5728\u53cc\u5411\u8ba4\u8bc1\u90fd\u5b8c\u6210\u540e\uff0cMME \u4e0e UE \u5c06KASME<\/span>(i)\u4f5c\u4e3a\u57fa\u7840\u5bc6\u94a5\uff0c\u6839\u636e\u7ea6\u5b9a\u7684\u7b97\u6cd5\u63a8\u6f14\u51fa\u52a0\u5bc6\u5bc6\u94a5CK<\/strong>\u4e0e\u5b8c\u6574\u6027\u4fdd\u62a4\u5bc6\u94a5IK<\/strong>\uff0c\u968f\u540e\u8fdb\u884c\u4fdd\u5bc6\u901a\u4fe1\u3002<\/p>\n

<\/p>\n

\u81f3\u6b64\uff0cEPS-AKA\u9274\u6743\u8fc7\u7a0b\u7ed3\u675f\u3002<\/p>\n

<\/p>\n

\u6211\u4eec\u518d\u770b\u4e00\u904d\u6574\u4e2a\u8fc7\u7a0b\uff08\u52a8\u56fe\uff09\uff1a<\/p>\n

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<\/span>\u53c2\u6570\u6bd4\u8f83\u591a\u54c8\uff01\u5927\u5bb6\u53ef\u80fd\u4f1a\u6bd4\u8f83\u6655\u3002\u3002\u3002<\/p>\n

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\u5176\u5b9e\uff0c\u5927\u5bb6\u770b\u5230\u7684K***\u4ec0\u4e48\u7684\uff0c\u90fd\u662f\u4ece\u6839\u5bc6\u94a5K\u91cc\u9010\u7ea7\u751f\u6210\u7684\u3002\u4e0d\u540c\u7684K***\uff0c\u5b58\u5728\u4e8e\u4e0d\u540c\u7684\u5730\u65b9\uff0c\u7528\u4e8e\u4e0d\u540c\u7684\u76ee\u7684\u3002<\/p>\n

<\/p>\n

\u5404\u4e2a\u5bc6\u94a5\u4e4b\u95f4\u7684\u5173\u7cfb\u5982\u4e0b\u56fe\uff1a<\/p>\n

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\u7ee7\u7eed\u5f80\u4e0b\u8bf4\uff0c\u521a\u624d\u2460~\u2469\uff0c\u662f\u9274\u6743\u7684\u8fc7\u7a0b\u3002<\/p>\n

<\/p>\n

\u9274\u6743\u4e4b\u540e\uff0c\u662f\u5b8c\u6574\u6027\u4fdd\u62a4\u548c\u52a0\u5bc6\u8fc7\u7a0b\u3002<\/p>\n

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