{"id":3981,"date":"2025-11-06T11:12:00","date_gmt":"2025-11-06T11:12:00","guid":{"rendered":"https:\/\/lp.szlogic.cn\/glossary\/what-you-should-know-about-precision-time-protocol-ptp\/"},"modified":"2026-06-22T05:29:43","modified_gmt":"2026-06-22T05:29:43","slug":"what-you-should-know-about-precision-time-protocol-ptp","status":"publish","type":"post","link":"https:\/\/resourceslp.szlogic.cn\/ja\/glossary\/what-you-should-know-about-precision-time-protocol-ptp","title":{"rendered":"\u30d7\u30ec\u30b7\u30b8\u30e7\u30f3\u30fb\u30bf\u30a4\u30e0\u30fb\u30d7\u30ed\u30c8\u30b3\u30eb\uff08PTP\uff09\u3068\u306f\uff1f\u7a76\u6975\u306e\u30ac\u30a4\u30c9"},"content":{"rendered":"
\"What<\/figure>\n\n\n\n

PTP\u306e\u524d\u306f\u3001 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30fb\u30bf\u30a4\u30e0\u30fb\u30d7\u30ed\u30c8\u30b3\u30eb\uff08NTP\uff09<\/strong> \u304c\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u6642\u8a08\u3092\u540c\u671f\u3059\u308b\u305f\u3081\u306e\u6a19\u6e96\u3067\u3057\u305f\u3002NTP\u306f\u30df\u30ea\u79d2\u5358\u4f4d\u3067\u306e\u540c\u671f\u306b\u512a\u308c\u3066\u304a\u308a\u3001\u591a\u304f\u306eIT\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u306f\u5341\u5206\u3067\u3059\u304c\u3001\u73fe\u4ee3\u306e\u7523\u696d\u304a\u3088\u3073\u91d1\u878d\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u306f\u308b\u304b\u306b\u9ad8\u3044\u7cbe\u5ea6\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002.<\/p>\n\n\n\n

IEEE 1588\u898f\u683c\u3067\u5b9a\u7fa9\u3055\u308c\u305f\u7cbe\u5bc6\u6642\u523b\u30d7\u30ed\u30c8\u30b3\u30eb\uff08PTP\uff09\u306f\u3001\u3053\u306e\u30ae\u30e3\u30c3\u30d7\u3092\u57cb\u3081\u308b\u305f\u3081\u306b\u958b\u767a\u3055\u308c\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u3001\u5206\u6563\u30b7\u30b9\u30c6\u30e0\u5185\u306e\u6642\u8a08\u3092 \u30de\u30a4\u30af\u30ed\u79d2\u672a\u6e80\u306e\u7cbe\u5ea6\u3067<\/strong> over a \u30ed\u30fc\u30ab\u30eb\u30a8\u30ea\u30a2\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\uff08LAN\uff09<\/strong><\/a>. \u4e0a\u3067\u540c\u671f\u3059\u308b\u3053\u3068\u3092\u76ee\u7684\u3068\u3057\u3066\u8a2d\u8a08\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u30bf\u30a4\u30df\u30f3\u30b0\u304c\u5358\u306a\u308b\u5229\u4fbf\u6027\u3067\u306f\u306a\u304f\u3001\u6975\u3081\u3066\u91cd\u8981\u3068\u306a\u308b\u5206\u91ce\u306b\u304a\u3044\u3066\u4e0d\u53ef\u6b20\u306a\u6280\u8853\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002.<\/p>\n\n\n\n

\ud83d\udcdc \u7cbe\u5bc6\u6642\u523b\u30d7\u30ed\u30c8\u30b3\u30eb\uff08PTP\uff09\u3068\u306f\uff1f \u6280\u8853\u7684\u8a73\u7d30\u89e3\u8aac<\/strong><\/h2>\n\n\n\n

\u672c\u8cea\u7684\u306b\u3001, PTP<\/strong> \u306f\u3001\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u6642\u8a08\u3092\u9ad8\u7cbe\u5ea6\u306b\u540c\u671f\u3055\u305b\u308b\u305f\u3081\u306e\u30d7\u30ed\u30c8\u30b3\u30eb\u3067\u3059\u3002NTP\u304c\u901a\u5e38\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30fb\u30b5\u30fc\u30d0\u30fc\u968e\u5c64\u3067\u52d5\u4f5c\u3059\u308b\u306e\u306b\u5bfe\u3057\u3001PTP\u306f\u3088\u308a\u6d17\u7df4\u3055\u308c\u305f \u30de\u30b9\u30bf\u30fc\u30b9\u30ec\u30fc\u30d6\u65b9\u5f0f<\/strong> \u3092\u63a1\u7528\u3057\u3001\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u306b\u3088\u308b\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\u6a5f\u80fd\u306b\u4f9d\u5b58\u3057\u3066\u3001\u305d\u306e\u5353\u8d8a\u3057\u305f\u7cbe\u5ea6\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n

PTP\u306e\u4e3b\u306a\u76ee\u7684\u306f\u3001\u6642\u8a08\u306e\u305a\u308c\u3092\u5f15\u304d\u8d77\u3053\u3059\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u9045\u5ef6\u3092\u6e2c\u5b9a\u30fb\u88dc\u6b63\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u6700\u3082\u6b63\u78ba\u306a\u6642\u523b\u6e90\u3067\u3042\u308b\u30de\u30b9\u30bf\u30fc\u30af\u30ed\u30c3\u30af\u3068\u3001\u540c\u671f\u5bfe\u8c61\u306e\u30b9\u30ec\u30fc\u30d6\u30af\u30ed\u30c3\u30af\u30b9\u306e\u9593\u3067\u3001\u4e00\u9023\u306e\u6642\u523b\u4ed8\u304d\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u4ea4\u63db\u3057\u307e\u3059\u3002.<\/p>\n\n\n\n

PTP\u540c\u671f\u306b\u304a\u3051\u308b\u4e3b\u8981\u306a\u624b\u9806\uff1a<\/strong><\/h4>\n\n\n\n
    \n

  1. Sync\u304a\u3088\u3073Follow-Up\u30e1\u30c3\u30bb\u30fc\u30b8\uff1a<\/strong> \u30de\u30b9\u30bf\u30fc\u306f\u3001\u9001\u4fe1\u6642\u523b\uff08t1\uff09\u3092\u8a18\u9332\u3057\u305f Sync<\/mark> \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u304c\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u76f4\u3061\u306b\u6b63\u78ba\u306a\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7t1\u3092\u542b\u3080 Follow_Up<\/mark> \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3057\u307e\u3059\u3002.<\/p><\/li>

  2. \u9045\u5ef6\u8981\u6c42\u304a\u3088\u3073\u5fdc\u7b54\uff1a<\/strong> \u30b9\u30ec\u30fc\u30d6\u306f\u305d\u306e\u5f8c\u3001\u9001\u4fe1\u6642\u523b\uff08t3\uff09\u3092\u8a18\u9332\u3057\u305f Delay_Req<\/mark> \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30de\u30b9\u30bf\u30fc\u306b\u8fd4\u9001\u3057\u307e\u3059\u3002\u30de\u30b9\u30bf\u30fc\u306f\u3053\u308c\u3092\u6642\u523bt4\u3067\u53d7\u4fe1\u3057\u3001\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7t4\u3092\u542b\u3080 Delay_Resp<\/mark> \u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u30b9\u30ec\u30fc\u30d6\u306b\u8fd4\u9001\u3057\u307e\u3059\u3002.<\/p><\/li>\n<\/ol>\n\n\n\n

    \u3053\u306e4\u3064\u306e\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d7\uff08t1\u3001t2\u3001t3\u3001t4\uff09\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u3001\u30b9\u30ec\u30fc\u30d6\u30af\u30ed\u30c3\u30af\u30b9\u306f\u30de\u30b9\u30bf\u30fc\u30af\u30ed\u30c3\u30af\u304b\u3089\u306e \u30aa\u30d5\u30bb\u30c3\u30c8<\/strong> \u304a\u3088\u3073 \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u9045\u5ef6<\/strong>, \u3092\u7b97\u51fa\u3057\u3001\u6975\u3081\u3066\u9ad8\u7cbe\u5ea6\u3067\u81ea\u8eab\u306e\u6642\u523b\u3092\u8abf\u6574\u3067\u304d\u307e\u3059\u3002.<\/p>\n\n\n\n

    \ud83d\udcdc PTP vs. NTP\uff1a\u76f4\u63a5\u6bd4\u8f03<\/strong><\/h2>\n\n\n\n

    \u306a\u305c\u3001\u3088\u308a\u5e83\u304f\u77e5\u3089\u308c\u3066\u3044\u308b PTP<\/strong> over the more well-known NTP<\/strong>\u3088\u308a\u3082PTP\u3092\u9078\u629e\u3059\u3079\u304d\u306a\u306e\u3067\u3057\u3087\u3046\u304b\uff1f\u4ee5\u4e0b\u306e\u8868\u306f\u3001\u305d\u306e\u4e3b\u306a\u9055\u3044\u3092\u793a\u3057\u3066\u304a\u308a\u3001\u30b7\u30b9\u30c6\u30e0\u5c0e\u5165\u3092\u691c\u8a0e\u3059\u308b\u3059\u3079\u3066\u306e\u65b9\u306b\u3068\u3063\u3066\u5fc5\u9808\u306e\u60c5\u5831\u3067\u3059\u3002 \u9ad8\u7cbe\u5ea6\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u540c\u671f<\/strong> \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3002.<\/p>\n\n\n\n

    \n\n<\/colgroup>

    \u6a5f\u80fd<\/p><\/th>

    \u7cbe\u5bc6\u6642\u523b\u30d7\u30ed\u30c8\u30b3\u30eb\uff08PTP\uff09<\/p><\/th>

    \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30fb\u30bf\u30a4\u30e0\u30fb\u30d7\u30ed\u30c8\u30b3\u30eb\uff08NTP\uff09<\/a><\/p><\/th><\/tr>

    \u7cbe\u5ea6<\/strong><\/p><\/td>

    \u30b5\u30d6\u30de\u30a4\u30af\u30ed\u79d2\uff5e\u30ca\u30ce\u79d2<\/strong><\/p><\/td>

    \u30df\u30ea\u79d2<\/p><\/td><\/tr>

    \u30a2\u30fc\u30ad\u30c6\u30af\u30c1\u30e3<\/strong><\/p><\/td>

    \u30de\u30b9\u30bf\u30fc\u30b9\u30ec\u30fc\u30d6\uff08\u968e\u5c64\u578b\uff09<\/p><\/td>

    \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30fb\u30b5\u30fc\u30d0\u30fc<\/p><\/td><\/tr>

    \u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d4\u30f3\u30b0<\/strong><\/p><\/td>

    \u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u30d9\u30fc\u30b9<\/strong> \uff08\u30b9\u30a4\u30c3\u30c1\u304a\u3088\u3073 NIC\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\uff09<\/strong><\/a>)<\/p><\/td>

    \u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u30d9\u30fc\u30b9<\/p><\/td><\/tr>

    \u4e3b\u306a\u7528\u9014<\/strong><\/p><\/td>

    \u7523\u696d\u30aa\u30fc\u30c8\u30e1\u30fc\u30b7\u30e7\u30f3\u3001\u91d1\u878d\u3001\u901a\u4fe1<\/p><\/td>

    IT\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3001\u4e00\u822c\u30b3\u30f3\u30d4\u30e5\u30fc\u30c6\u30a3\u30f3\u30b0<\/p><\/td><\/tr>

    \u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4f9d\u5b58\u6027<\/strong><\/p><\/td>

    PTP\u5bfe\u5fdc\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u3092\u5fc5\u8981\u3068\u3059\u308b<\/p><\/td>

    \u6a19\u6e96IP\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u4e0a\u3067\u52d5\u4f5c\u3059\u308b<\/p><\/td><\/tr>

    \u6a19\u6e96<\/strong><\/p><\/td>

    IEEE 1588<\/p><\/td>

    RFC 5905<\/p><\/td><\/tr><\/tbody>\n<\/table>\n<\/figure>\n\n\n\n

    \u3054\u89a7\u306e\u901a\u308a\u3001\u30ca\u30ce\u79d2\u5358\u4f4d\u306e\u7cbe\u5ea6\u304c\u6c42\u3081\u3089\u308c\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3044\u3066\u306f\u3001, PTP\u306f\u65ad\u7136\u306e\u52dd\u8005\u3067\u3059\u3002<\/strong>. \u5805\u7262\u306aPTP\u30a4\u30f3\u30d5\u30e9\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306f\u3001\u3057\u3070\u3057\u3070\u5c02\u7528\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u5fc5\u8981\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306b\u306f\u3001 PTP\u30b0\u30e9\u30f3\u30c9\u30de\u30b9\u30bf\u30fc\u30af\u30ed\u30c3\u30af<\/strong> \u304a\u3088\u3073\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d4\u30f3\u30b0\u3092\u30b5\u30dd\u30fc\u30c8\u3059\u308b\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u6a5f\u5668\u304c\u542b\u307e\u308c\u307e\u3059\u3002.<\/p>\n\n\n\n

    \ud83d\udcdc PTP\u306f\u3069\u3053\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\uff1f \u4e3b\u306a\u5fdc\u7528\u5206\u91ce<\/strong><\/h2>\n\n\n\n

    \u305d\u306e\u6bd4\u985e\u306a\u304d\u7cbe\u5ea6\u306b\u3088\u308a\u3001 PTP<\/strong> PTP\u306f\u3001\u3044\u304f\u3064\u304b\u306e\u9ad8\u30ea\u30b9\u30af\u7523\u696d\u306b\u304a\u3051\u308b\u57fa\u76e4\u6280\u8853\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001 \u201c\u300c\u7523\u696d\u30aa\u30fc\u30c8\u30e1\u30fc\u30b7\u30e7\u30f3\u5411\u3051PTP\u300d\u201d<\/strong> \u307e\u305f\u306f \u201c\u300c\u91d1\u878d\u53d6\u5f15\u306e\u30bf\u30a4\u30e0\u30b9\u30bf\u30f3\u30d4\u30f3\u30b0\u8981\u4ef6\u300d\u201d<\/strong> \u3092\u691c\u7d22\u3059\u308b\u3068\u3001\u305d\u306e\u89e3\u6c7a\u7b56\u306e\u4e2d\u5fc3\u306bPTP\u304c\u4f4d\u7f6e\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002.<\/p>\n\n\n\n