{"id":12305,"date":"2025-03-30T12:01:04","date_gmt":"2025-03-30T03:01:04","guid":{"rendered":"https:\/\/www11.ieice.org\/cs\/ap\/wp\/?page_id=12305"},"modified":"2025-12-05T19:20:52","modified_gmt":"2025-12-05T10:20:52","slug":"indoor_propagation_loss","status":"publish","type":"page","link":"https:\/\/www.ieice.org\/cs\/ap\/misc\/denpan-db\/prop_model_db\/model_list\/indoor_propagation_loss\/","title":{"rendered":"\u5c4b\u5185\u4f1d\u642c\u640d\u5931"},"content":{"rendered":"
<\/div>

<\/path><\/svg><\/i> \"Loading\"<\/p>

<\/div>(since 2025\/12\/5)<\/p>\n\n\n\n

\u30e2\u30c7\u30eb\u306e\u6982\u8981<\/h3>\n\n\n\n

\u3000\u5c4b\u5185\u4f1d\u642c\u3068\u306f\u5efa\u7269\u5185\u306b\u9001\u4fe1\u5c40\u3068\u53d7\u4fe1\u5c40\u304c\u3042\u308b\u5834\u5408\u306e\u4f1d\u642c\u3067\u3042\u308b\u3002\u3053\u3053\u3067\u306f\u3001ITU-R\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308bP.1238[1]\u3068M.1225[2]\u3092\u53d6\u308a\u4e0a\u3052\u3066\u8aac\u660e\u3059\u308b\u3002\u3053\u308c\u3089\u304c\u5bfe\u8c61\u3068\u3057\u3066\u3044\u308b\u74b0\u5883\u306f\u3001\u5efa\u7269\u3068\u3057\u3066\u306f\u30d3\u30eb\u3084\u4e00\u8ed2\u5bb6\u3067\u3042\u308a\u3001\u30d3\u30eb\u306e\u4e2d\u306e\u90e8\u5c4b\u3068\u3057\u3066\u306f\u30aa\u30d5\u30a3\u30b9\u3084\u4f1a\u8b70\u5834\u306a\u3069\u3067\u3042\u308b\u3002\u307e\u305f\u5546\u7528\u65bd\u8a2d\u306e\u3088\u3046\u306b\u5e83\u3044\u7a7a\u9593\u3082\u3042\u308b\u3002\u9001\u4fe1\u5c40\u3068\u53d7\u4fe1\u5c40\u306e\u4f4d\u7f6e\u3068\u3057\u3066\u306f\u3001\u540c\u4e00\u30d5\u30ed\u30a2\u5185\u306b\u3042\u308b\u5834\u5408\u3084\u7570\u306a\u308b\u30d5\u30ed\u30a2\u306b\u3042\u308b\u5834\u5408\u304c\u3042\u308b\u3002\u3053\u3053\u3067\u306f\u3001\u5c4b\u5185\u4f1d\u642c\u7279\u6027\u3068\u3057\u3066\u4f1d\u642c\u640d\u5931\u3092\u5bfe\u8c61\u306b\u3057\u304a\u308a\u3001\u305d\u306e\u4ed6\u306e\u591a\u91cd\u6ce2\u4f1d\u642c\u3084\u4ea4\u5dee\u504f\u6ce2\u8b58\u5225\u5ea6\u7b49\u306f\u6271\u308f\u306a\u3044\u3002P.1238\u306f\u6587\u732e[3,4]\u3067\u3001 M.1225\u306f\u6587\u732e[5]\u3067\u3082\u7d39\u4ecb\u3055\u308c\u3066\u3044\u308b\u3002\u307e\u305f\u3001\u6587\u732e[6]\u306b\u306f\u5c4b\u5185\u3067\u306e\u4f1d\u642c\u7279\u6027\u304c\u89e3\u8aac\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n\n\n

\n
\"\"
\u56f31 \u5c4b\u5185\u4f1d\u642c\u306e\u69d8\u5b50<\/span><\/figcaption><\/figure><\/div>\n\n\n
<\/div>\n\n\n\n

\uff08\uff11\uff09ITU-R P.1238\u30e2\u30c7\u30eb<\/span><\/strong><\/p>\n\n\n\n

\u3000ITU-R P.1238\u306b\u306f\u5c4b\u5185\u4f1d\u642c\u306e\u30b5\u30a4\u30c8\uff70\u30b8\u30a7\u30cd\u30e9\u30eb\u30e2\u30c7\u30eb\u3068\u30b5\u30a4\u30c8\uff70\u30b9\u30da\u30b7\u30d5\u30a3\u30c3\u30af\u30e2\u30c7\u30eb\u306e2\u3064\u304c\u793a\u3055\u308c\u3066\u3044\u308b\u304c\u3001\u3053\u3053\u3067\u306f\u30b5\u30a4\u30c8\uff70\u30b8\u30a7\u30cd\u30e9\u30eb\u30e2\u30c7\u30eb\u3092\u7d39\u4ecb\u3059\u308b\u3002\u3053\u306e\u4f1d\u642c\u640d\u5931\\( L_b(d, f) \\)\u306e\u5f0f\u306f\u6b21\u306e\u3068\u304a\u308a\u3002<\/p>\n\n\n\n

\\(
L_b(d, f) = 10 \\alpha \\log_{10} d + \\beta + 10 \\gamma \\log_{10} f \\qquad {\\rm (dB)}
\\tag{1}
\\)<\/p>\n\n\n\n

\u3053\u3053\u3067\u3001
\u3000\\( d \\)\uff1a3\u6b21\u5143\u306e\u9001\u53d7\u4fe1\u9593\u8ddd\u96e2(m)
\u3000\\( f \\)\uff1a\u5468\u6ce2\u6570(GHz)
\u3000\\( \\alpha \\)\uff1a\u8ddd\u96e2\u306b\u5bfe\u3059\u308b\u4fc2\u6570
\u3000\\( \\beta \\)\uff1a\u30aa\u30d5\u30bb\u30c3\u30c8\u4fc2\u6570
\u3000\\( \\gamma \\)\uff1a\u5468\u6ce2\u6570\u306b\u5bfe\u3059\u308b\u4fc2\u6570
\u306a\u304a\u3001\u5f0f(1)\u306b\u306f\u77ed\u533a\u9593\u5909\u52d5\u3068\u3057\u3066\u5e73\u57470\u3067\u6a19\u6e96\u504f\u5dee\\( \\sigma \\)(dB)\u306e\u30ac\u30a6\u30b9\u5206\u5e03\u304c\u52a0\u3048\u3089\u308c\u308b\u3002\u88681\u306b\u63a8\u5968\u3055\u308c\u308b\u4fc2\u6570\u5024\u3092\u793a\u3059\u3002<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n
<\/div>\n\n\n\n

\uff08\uff12\uff09ITU-R M.1225\u30e2\u30c7\u30eb<\/span><\/strong><\/p>\n\n\n\n

\u3000ITU-R M.1225\u306fIMT-2000\u306e\u30c6\u30b9\u30c8\u3092\u884c\u3046\u305f\u3081\u306b\u4f5c\u3089\u308c\u305f\u30e2\u30c7\u30eb\u3067\u3042\u308b\u3002M.1225\u306e\u4e2d\u306e\u5c4b\u5185\u306e\u30aa\u30d5\u30a3\u30b9\u306e\u4f1d\u642c\u640d\u5931\u30e2\u30c7\u30eb\u306fCOST231\u306e\u5c4b\u5185\u30e2\u30c7\u30eb\u3092\u5143\u306b\u4f5c\u6210\u3055\u308c\u305f\u3002\u4f1d\u642c\u640d\u5931\\( L \\)\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3042\u308b\u3002<\/p>\n\n\n\n

\\(
{\\displaystyle L = 37 + 30 \\log_{10} R + 18.3 n^{ \\left( \\frac{ n+2 }{ n+1 } – 0.46 \\right) } } \\qquad {\\rm (dB)}
\\tag{2}
\\)<\/p>\n\n\n\n

\u3053\u3053\u3067\u3001\\( R \\)\u306f\u9001\u53d7\u4fe1\u9593\u8ddd\u96e2(m)\u3001\\( n \\)\u306f\u9001\u53d7\u4fe1\u9593\u306b\u3042\u308b\u30d5\u30ed\u30a2\u306e\u6570\u3067\u3042\u308b\u3002
\u30fb\u4f1d\u642c\u640d\u5931\\( L \\)\u306f\u81ea\u7531\u7a7a\u9593\u640d\u5931\u3088\u308a\u5c0f\u3055\u304f\u306a\u3089\u306a\u3044\u3002
\u30fb12dB\u306e\u5bfe\u6570\u6b63\u898f\u5206\u5e03\u306e\u6a19\u6e96\u504f\u5dee\u304c\u4e88\u60f3\u3055\u308c\u308b\u3002
\u30fbIMT-2000\u7528\u306a\u306e\u3067\u5468\u6ce2\u6570\u306f2GHz\u3067\u3042\u308b\u3002
\u30fb\u898b\u901a\u3057\u306e\u6709\u7121\u306b\u3088\u308b\u533a\u5225\u306f\u306a\u3044\u3002
\u30fb\u30d5\u30ed\u30a2\u6570\\( n \\)\u306b\u5bfe\u3059\u308b\u30d5\u30ed\u30a2\u9593\u640d\u5931\u306f\u3001\\( n \\)=0\u30670dB\u3001\\( n \\)=1\u306718.3dB\u3001\\( n \\)=2\u306733.5dB\u3001\\( n \\)=3\u306743.6dB\u3068\u306a\u308b\u3002<\/p>\n\n\n\n

<\/div>\n\n\n\n

\u8a08\u7b97\u4f8b<\/h3>\n\n\n\n

\u3000ITU-R P.1238\u3068ITU-R M.1225\u306e\u5c4b\u5185\u4f1d\u642c\u640d\u5931\u306e\u8a08\u7b97\u4f8b\u3092\u793a\u3059\u3002<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u53c2\u7167<\/h2>\n\n\n\n[1]  Rec. ITU-R P.1238-12, \u201cPropagation data and prediction methods for the planning of indoor radiocommunication systems and radio local area networks in the frequency range 300 MHz to 450 GHz,\u201d ITU-R, 2023.
[2] Rec. ITU-R M.1225-0, \u201cGuidelines for evaluation of radio transmission technologies for IMT-2000,\u201d ITU-R, 1225.
[3] \u4e95\u539f\u4fca\u592b, \u771f\u934b\u6b66\u55e3, \u201c\u5c4b\u5185\u901a\u4fe1\uff0f\u7121\u7ddaLAN\u306e\u4f1d\u642c,\u201d \u96fb\u6ce2\u4f1d\u642c\u30cf\u30f3\u30c9\u30d6\u30c3\u30af, \u7d30\u77e2\u826f\u96c4\uff08\u76e3\u4fee\uff09, \u7b2c24\u7ae0, \uff08\u682a\uff09\u30ea\u30a2\u30e9\u30a4\u30ba\u793e, \u6771\u4eac, 1999.
[4] \u5317\u76f4\u6a39, \u201c\u9ad8\u5468\u6ce2\u6570\u5e2f\u306b\u304a\u3051\u308b\u7121\u7dda\u30be\u30fc\u30f3\u8a2d\u8a08\u306e\u305f\u3081\u306e\u96fb\u6ce2\u4f1d\u642c,\u201d \u30a2\u30f3\u30c6\u30ca\u30fb\u4f1d\u642c\u306b\u304a\u3051\u308b\u8a2d\u8a08\u30fb\u89e3\u6790\u624b\u6cd5\u30ef\u30fc\u30af\u30b7\u30e7\u30c3\u30d7\uff08\u7b2c71\u56de\uff09\u30c6\u30ad\u30b9\u30c8, pp.86–91, \u4fe1\u5b66\u4f1aAP\u7814\u5c02\u9580\u59d4\u54e1\u4f1a, May 2024.
[5] \u5ca9\u4e95\u8aa0\u4eba, “\u79fb\u52d5\u901a\u4fe1\u306b\u304a\u3051\u308b\u96fb\u6ce2\u4f1d\u642c,” pp.145–152, \uff08\u682a\uff09\u30b3\u30ed\u30ca\u793e, \u6771\u4eac, 2012.
[6] \u660e\u5c71\u54f2, \u201c\u79fb\u52d5\u901a\u4fe1\u56de\u7dda\u306e\u4f1d\u642c,\u201d \u7121\u7dda\u901a\u4fe1\u306e\u96fb\u6ce2\u4f1d\u642c, \u9032\u58eb\u660c\u660e\uff08\u7de8\u8457\uff09, \u7b2c12\u7ae0, pp.239–242, \uff08\u793e\uff09\u96fb\u5b50\u60c5\u5831\u901a\u4fe1\u5b66\u4f1a, \u6771\u4eac, 1992.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u30e2\u30c7\u30eb\u306e\u6982\u8981 \u3000\u5c4b\u5185\u4f1d\u642c\u3068\u306f\u5efa\u7269\u5185\u306b\u9001\u4fe1\u5c40\u3068\u53d7\u4fe1\u5c40\u304c\u3042\u308b\u5834\u5408\u306e\u4f1d\u642c\u3067\u3042\u308b\u3002\u3053\u3053\u3067\u306f\u3001ITU-R\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308bP.1238[1]\u3068M.1225[2]\u3092\u53d6\u308a\u4e0a\u3052\u3066\u8aac\u660e\u3059\u308b\u3002\u3053\u308c\u3089\u304c\u5bfe\u8c61\u3068\u3057\u3066\u3044\u308b\u74b0\u5883\u306f\u3001\u5efa\u7269\u3068\u3057\u3066\u306f\u30d3\u30eb\u3084\u4e00 […]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":12073,"menu_order":53,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-12305","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages\/12305","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/comments?post=12305"}],"version-history":[{"count":12,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages\/12305\/revisions"}],"predecessor-version":[{"id":14893,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages\/12305\/revisions\/14893"}],"up":[{"embeddable":true,"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/pages\/12073"}],"wp:attachment":[{"href":"https:\/\/www.ieice.org\/cs\/ap\/wp-json\/wp\/v2\/media?parent=12305"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}