﻿{"id":114,"date":"2009-07-13T15:20:20","date_gmt":"2009-07-13T15:20:20","guid":{"rendered":""},"modified":"2011-11-18T16:59:16","modified_gmt":"2011-11-18T08:59:16","slug":"114","status":"publish","type":"post","link":"http:\/\/zerobox.org\/notes\/114.html","title":{"rendered":"\u65e0\u7ebf\u7f51\u7edc\u6280\u672f\u7b80\u4ecb"},"content":{"rendered":"<div id=\"postmessage_19213\" class=\"t_msgfont\"><span style=\"font-size: small;\"><span style=\"font-size: small;\">\u65e0\u7ebf\u901a\u4fe1\u662f\u4eba\u4eec\u68a6\u5bd0\u4ee5\u6c42\u7684<span class=\"t_tag\" onclick=\"tagshow(event)\">\u6280\u672f<\/span>\uff0c\u6709\u4e86\u5b83\uff0c\u6211\u4eec\u5728\u8fdb\u884c\u6570\u636e\u4ea4\u6362\u65f6\u5c31\u4e0d\u5fc5\u53d7\u65f6\u95f4\u548c<span class=\"t_tag\" onclick=\"tagshow(event)\">\u7a7a\u95f4<\/span>\u7684\u9650\u5236\uff0c\u53ef\u4ee5\u968f\u65f6\u968f\u5730\u6d4f\u89c8Internet\uff0c\u518d\u4e5f\u4e0d\u7528\u4e3a<span class=\"t_tag\" onclick=\"tagshow(event)\">\u7f51\u7edc<\/span>\u5e03\u7ebf\u800c\u82e6\u607c\u2026\u2026\u3002\u4f46\u662f\uff0c\u73b0\u5728\u76f8\u5173\u7684\u65e0\u7ebf\u7f51\u7edc\u6280\u672f\u5b9e\u5728\u662f\u592a\u591a\u4e86\uff0c\u6bd5\u7adf\u6709\u597d\u6709\u574f\u3002\u4e0b\u9762\u5c31\u5bf9\u76ee\u524d\u6d41\u884c\u7684\u6280\u672f\u8fdb\u884c\u7b80\u5355\u7684\u4ecb\u7ecd\u3002<\/span><\/span>\u7a84\u5e26\u5e7f\u57df\u7f51<br \/>\n1.HSCSD<br \/>\nHSCSD\uff08\u9ad8\u901f\u7ebf\u8def\u4ea4\u6362\u6570\u636e\uff09\u662f\u4e3a\u65e0\u7ebf<span class=\"t_tag\" onclick=\"tagshow(event)\">\u7528\u6237<\/span>\u63d0\u4f9b38.3kbps\u901f\u7387\u4f20\u8f93\u7684\u65e0\u7ebf\u6570\u636e\u4f20\u8f93\u65b9\u5f0f\uff0c\u5b83\u7684\u901f\u5ea6\u6bd4GSM\u901a\u4fe1\u6807\u51c6\u7684\u6807\u51c6\u6570\u636e\u901f\u7387\u5feb4\u500d\uff0c\u53ef\u4ee5\u548c\u4f7f\u7528\u56fa\u5b9a\u7535\u8bdd\u8c03\u5236\u89e3\u8c03\u5668\u7684\u7528\u6237\u76f8\u6bd4\u3002\u5f53\u524d\uff0cGSM\u7f51\u7edc\u5355\u4e2a\u4fe1\u9053\u5728\u6bcf\u4e2a\u65f6\u9699\u53ea\u80fd\u652f\u63011\u4e2a\u7528\u6237\uff0c\u800cHSCSD\u901a\u8fc7\u5141\u8bb81\u4e2a\u7528\u6237\u5728\u540c\u4e00\u65f6\u95f4\u540c\u65f6\u8bbf\u95ee\u591a\u4e2a\u4fe1\u9053\u6765\u5927\u5e45\u6539\u8fdb\u6570\u636e\u8bbf\u95ee\u901f\u7387\u3002\u4f46\u7f8e\u4e2d\u4e0d\u8db3\u7684\u662f\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u7528\u6237\u6210\u672c\u7684\u589e\u52a0\u3002\u5047\u8bbe1\u4e2a\u6807\u51c6\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\u662f14 400bps\uff0c\u4f7f\u7528\u5177\u67094\u4e2a\u65f6\u9699\u7684HSCSD\u5c06\u4f7f\u6570\u636e\u8bbf\u95ee\u901f\u7387\u8fbe\u523057.6Kbps\u3002\u76ee\u524d\u652f\u6301HSCSD\u7684\u624b\u673a\u6709NOKIA\u76846210\u548c6250\u3002<\/p>\n<p>2.GPRS<br \/>\nGPRS\uff08\u591a\u65f6\u9699\u901a\u7528\u5206\u7ec4\u65e0\u7ebf<span class=\"t_tag\" onclick=\"tagshow(event)\">\u4e1a\u52a1<\/span>\uff09\u662f\u4e00\u79cd\u5f88\u5bb9\u6613\u4e0eIP\u63a5\u53e3\u7684\u5206\u7ec4\u4ea4\u6362\u4e1a\u52a1\uff0c\u5176\u901f\u7387\u53ef\u8fbe9.6\uff5e14.4kbps\uff0c\u751a\u81f3\u80fd\u8fbe\u5230115kbps\uff0c\u5e76\u4e14\u80fd\u591f\u4f20\u9001\u8bdd\u97f3\u548c\u6570\u636e\u3002\u8be5\u6280\u672f\u662f\u5f53\u524d\u63d0\u9ad8Internet\u63a5\u5165\u901f\u5ea6\u7684\u70ed\u95e8\u6280\u672f\uff0c\u800c\u4e14\u8fd8\u6709\u53ef\u80fd\u88ab\u5e94\u7528\u5728\u5e7f\u57df\u7f51\u4e2d\u3002GPRS\u53c8\u88ab\u8ba4\u4e3a\u662fGSM\u7b2c2\u9636\u6bb5\u589e\u5f3a\uff08GSM Phase2\uff0b\uff09\u63a5\u5165\u6280\u672f\u3002GPRS\u867d\u662fGSM\u4e0a\u7684\u5206\u7ec4\u6570\u636e\u4f20\u8f93\u6807\u51c6\uff0c\u4f46\u4e5f\u53ef\u548cIS-136\u6807\u51c6\u7ed3\u5408\u4f7f\u7528\u3002\u968f\u7740Internet\u7684\u53d1\u5c55\u548c\u8702\u7a9d\u79fb\u52a8\u901a\u4fe1\u7684\u666e\u53ca\uff0cGSM\u7684\u53d1\u5c55\u6709\u76ee\u5171\u7779\uff0c\u56e0\u800cGPRS\u6280\u672f\u7684\u524d\u666f\u4e5f\u5341\u5206\u5e7f\u9614\u3002<\/p>\n<p>GPRS\u662fGSM\u4e00\u9879\u65b0\u7684\u627f\u8f7d\u4e1a\u52a1\uff0c\u63d0\u9ad8\u5e76\u7b80\u5316\u4e86\u65e0\u7ebf\u6570\u636e\u63a5\u5165\u5206\u7ec4\u7f51\u7edc\u7684\u65b9\u5f0f\uff0c\u5206\u7ec4\u6570\u636e\u53ef\u76f4\u63a5\u5728GSM\u57fa\u7ad9\u548c\u5176\u4ed6\u5206\u7ec4\u7f51\u4e4b\u95f4\u4f20\u8f93\u3002\u5b83\u5177\u6709\u63a5\u5165\u65f6\u95f4\u77ed\u3001\u901f\u7387\u9ad8\u7684\u7279\u70b9\u3002\u7531\u4e8e\u5b83\u662f\u5206\u7ec4\u65b9\u5f0f\u7684\uff0c\u56e0\u6b64\u53ef\u4ee5\u6309\u5b57\u8282\u6570\u6765\u8ba1\u8d39\uff0c\u8fd9\u4e9b\u548c\u4f20\u7edf\u7684\u62e8\u53f7\u63a5\u5165\u65f6\u95f4\u957f\u3001\u6309\u7535\u8def\u6301\u7eed\u65f6\u95f4\u8ba1\u8d39\u660e\u663e\u4e0d\u540c\u3002\u540c\u65f6\uff0cGPRS\u7f51\u662fGSM\u4e0a\u7684\u5206\u7ec4\u7f51\uff0c\u5b83\u5b9e\u9645\u4e0a\u53c8\u662fInternet\u76841\u4e2a\u5b50\u7f51\u3002\u5728GPRS\u7684\u652f\u6301\u4e0b\uff0cGSM\u53ef\u4ee5\u63d0\u4f9b\uff1aE-mail\u3001<span class=\"t_tag\" onclick=\"tagshow(event)\">\u7f51\u9875<\/span>\u6d4f\u89c8\u3001\u589e\u5f3a\u7684\u77ed\u6d88\u606f\u4e1a\u52a1\u3001\u5373\u65f6\u7684\u65e0\u7ebf\u56fe\u50cf\u4f20\u9001\u3001\u5bfb\u50cf\u4e1a\u52a1\u3001\u6587\u672c\u548c\u4f4f\u5904\u5171\u4eab\u3001\u76d1\u89c6\u3001Voice over Internet\u3001\u5e7f\u64ad\u4e1a\u52a1\u3002\u7531\u4e8e\u5b83\u91c7\u7528\u7684\u662f\u5206\u7ec4\u6280\u672f\uff0c\u4e0e\u4f20\u7edf\u7684\u65e0\u7ebf\u7535\u8def\u4e1a\u52a1\u5728\u5b9e\u65bd\u4e0a\u6709\u5b8c\u5168\u4e0d\u540c\u7684\u7279\u70b9\u3002<\/p>\n<p>GPRS\u7f51\u7edc\u540c\u65f6\u652f\u6301IPv4\u548cIPv6\uff0c\u662f\u901a\u5411\u7b2c\u4e09\u4ee3\u79fb\u52a8\u901a\u4fe1\u7f51\u7edc\u7684\u91cd\u8981\u4e00\u6b65\u3002\u5b83\u9002\u5408\u4e8e\u7a81\u53d1\u6027Internet\/ Intranet\u4e1a\u52a1\uff0c\u5e76\u80fd\u63d0\u4f9b\u70b9\u5230\u70b9\u7684\u627f\u8f7d\u4e1a\u52a1\u4ee5\u53ca\u5b8c\u6210\u77ed\u6d88\u606f\u4e1a\u52a1\u7684\u4f20\u9001\u3002\u9884\u8ba1\u5728\u5c06\u6765\uff0c\u5b83\u4e5f\u80fd\u63d0\u4f9b\u5355\u70b9\u5230\u591a\u70b9\u7684\u4e1a\u52a1\u3002\u66f4\u91cd\u8981\u7684\u662fGPRS\u5177\u6709\u6709\u9650\u7684QoS\u652f\u6301\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u7531\u76f8\u5173\u53c2\u6570\u6765\u6307\u5b9a\u4e1a\u52a1\u7684\u7ee7\u627f\u6027\u3001\u53ef\u9760\u6027\u3001\u5ef6\u65f6\u3001\u6d41\u91cf\u3002<\/p>\n<p>\u76ee\u524d\u5e02\u573a\u4e0a\u8fd8\u5f88\u96be\u4e70\u5230\u652f\u6301GPRS\u7684\u624b\u673a\uff0c\u5e76\u4e14<span class=\"t_tag\" onclick=\"tagshow(event)\">\u4e2d\u56fd<\/span>\u79fb\u52a8\u901a\u4fe1\u76ee\u524d\u8fd8\u4e0d\u652f\u6301GPRS\u3002\u636e\u79f0\uff0c\u4e2d\u56fd\u79fb\u52a8\u901a\u4fe1\u6b63\u5728<span class=\"t_tag\" onclick=\"tagshow(event)\">\u5f00\u53d1<\/span>\u201c\u68a6\u7f51\u201d\uff0c\u53ef\u80fd\u5e94\u7528\u7684\u6280\u672f\u5c31\u662fGPRS\u3002<\/p>\n<p>3.CDPD<br \/>\nCDPD\uff08\u8702\u7a9d\u6570\u5b57\u5206\u7ec4\u6570\u636e\uff09\u91c7\u7528\u5206\u7ec4\u6570\u636e\u65b9\u5f0f\uff0c\u662f\u76ee\u524d\u516c\u8ba4\u7684\u6700\u4f73\u65e0\u7ebf\u516c\u5171\u7f51\u7edc\u6570\u636e\u901a\u4fe1\u89c4\u7a0b\u3002\u5b83\u662f\u5efa\u7acb\u5728TCP\/IP<span class=\"t_tag\" onclick=\"tagshow(event)\">\u57fa\u7840<\/span>\u4e0a\u7684\u4e00\u79cd\u5f00\u653e<span class=\"t_tag\" onclick=\"tagshow(event)\">\u7cfb\u7edf<\/span>\u7ed3\u6784\uff0c\u5c06\u5f00\u653e\u5f0f\u63a5\u53e3\u3001\u9ad8\u4f20\u8f93\u901f\u5ea6\u3001\u7528\u6237\u5355\u5143\u786e\u5b9a\u3001\u7a7a\u4e2d\u94fe\u8def\u52a0\u5bc6\u3001\u7a7a\u4e2d\u6570\u636e\u52a0\u5bc6\u3001\u538b\u7f29\u6570\u636e\u7ea0\u9519\u53ca\u91cd\u53d1\u548c\u4e16\u754c\u6807\u51c6\u7684IP\u5bfb\u5740\u6a21\u5f0f\u65e0\u7ebf\u63a5\u5165\u6709\u673a\u5730\u7ed3\u5408\u5728\u4e00\u8d77\uff0c\u63d0\u4f9b\u540c\u5c42\u7f51\u7edc\u7684\u65e0\u7f1d\u8fde\u63a5\u3001\u591a<span class=\"t_tag\" onclick=\"tagshow(event)\">\u534f\u8bae<\/span>\u7f51\u7edc<span class=\"t_tag\" onclick=\"tagshow(event)\">\u670d\u52a1<\/span>\u3002<\/p>\n<p>4.\u4e09\u79cd\u6807\u51c6\u7684\u6bd4\u8f83<br \/>\nGSM\u6807\u51c6\u673a\u6784ETSI\u51fa\u7248HSCSD\u89c4\u8303\u7684\u65f6\u95f4\u8981\u6bd4\u51fa\u7248GPRS\u89c4\u8303\u7684\u65f6\u95f4\u65e91\u5e74\u591a\uff0c\u4f46\u76ee\u524dGPRS\u7684\u5b9e\u9645\u5e94\u7528\u8981\u66f4\u5e7f\u6cdb\u4e00\u4e9b\u3002\u867d\u7136\u5df2\u670910\u591a\u5bb6\u8fd0\u8425\u5546\u4eceNOKIA\u548cEricssion\u8ba2\u8d2dHSCSD\u7684\u65b9\u6848\uff0c\u4f46\u76f4\u5230\u73b0\u5728\u4e3a\u6b62\u8fd8\u6ca1\u6709\u5546\u4e1a\u5316\u7684HSCSD\u670d\u52a1\u63d0\u4f9b\u7ed9\u7528\u6237\u3002<\/p>\n<p>GPRS\u4e0eCDPD\u6027\u80fd\u6bd4\u8f83\uff08\u89c1\u8868\u4e00\uff09\uff1a<br \/>\n\u7c7b\u6bd4\u540e\u53ef\u4ee5\u770b\u51fa\uff0cGPRS\u548cCDPD\u5404\u6709\u5343\u79cb\uff0c\u662f\u79fb\u52a8<span class=\"t_tag\" onclick=\"tagshow(event)\">\u4e0a\u7f51<\/span>\u7684\u597d\u9009\u62e9\u3002<\/p>\n<p>5.\u5176\u4ed6\u76ee\u524d\u5f88\u96be\u89c1\u5230\u7684\u6280\u672f<br \/>\n\uff08EDGE\u548cUMTS\uff09<br \/>\nEDGE\u662f\u4e00\u79cd\u6709\u6548\u63d0\u9ad8\u4e86GPRS\u4fe1\u9053\u7f16\u7801\u6548\u7387\u7684\u9ad8\u901f\u79fb\u52a8\u6570\u636e\u6807\u51c6\uff0c\u5b83\u5141\u8bb8\u9ad8\u8fbe384Kbps\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\uff0c\u53ef\u4ee5\u5145\u5206\u6ee1\u8db3\u672a\u6765\u65e0\u7ebf\u591a\u5a92\u4f53\u5e94\u7528\u7684\u5e26\u5bbd\u9700\u6c42\u3002EDGE\u662f\u4e3a\u65e0\u6cd5\u5f97\u5230UMTS\u9891\u8c31\u7684\u79fb\u52a8\u7f51\u7edc\u8fd0\u8425\u5546\u800c\u8bbe\u8ba1\u7684\uff0c\u5b83\u63d0\u4f9b\u4e00\u4e2a\u4eceGPRS\u5230UMTS\u7684\u8fc7\u6e21\u6027\u65b9\u6848\uff0c\u4ece\u800c\u4f7f\u73b0\u6709\u7684\u7f51\u7edc\u8fd0\u8425\u5546\u53ef\u4ee5\u6700\u5927\u9650\u5ea6\u5730\u5229\u7528\u73b0\u6709\u7684\u65e0\u7ebf\u7f51\u7edc\u8bbe\u5907\uff0c\u5728\u7b2c\u4e09\u4ee3\u79fb\u52a8\u7f51\u7edc\u5546\u4e1a\u5316\u4e4b\u524d\u63d0\u524d\u4e3a\u7528\u6237\u63d0\u4f9b\u4e2a\u4eba\u591a\u5a92\u4f53\u901a\u4fe1\u4e1a\u52a1\u3002\u73b0\u5728\uff0cNOKIA\u548cEricssion\u516c\u53f8\u7684\u7814\u7a76\u548c\u5f00\u53d1\u90e8\u95e8\u6b63\u5728\u5bf9EDGE\u6280\u672f\u8fdb\u884c\u653b\u5173\uff0c\u6709\u671b\u57282001\uff5e2002\u5e74\u5c06\u5176\u6295\u5165\u5546\u7528\u3002<\/p>\n<p>UMTS\uff08Universal Mobile Telecommunication System\uff09\u662fITU IMT\uff0d2000\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u3002\u65e9\u57281991\u5e74\uff0cETSI\u5c31\u5f00\u59cb\u4e86\u8fd9\u65b9\u9762\u7684\u6280\u672f\u7814\u7a76\uff0c1998\u5e74\u521d\uff0c\u5b83\u4e3aUMTS\u9009\u62e9\u4e86\u4e00\u79cd\u65e0\u7ebf\u63a5\u53e3UTRA\uff08UMTS Terrestrial Radio Access\uff09\u4f5c\u4e3a<span class=\"t_tag\" onclick=\"tagshow(event)\">\u5168\u7403<\/span>\u5730\u9762\u65e0\u7ebf\u63a5\u5165\u7f51\u7edc\u7684\u57fa\u7840\u3002<\/p>\n<p>UMTS\u9664\u652f\u6301\u73b0\u6709\u7684\u4e00\u4e9b\u56fa\u5b9a\u548c\u79fb\u52a8\u4e1a\u52a1\u5916\uff0c\u8fd8\u63d0\u4f9b\u5168\u65b0\u7684\u4ea4\u4e92\u5f0f\u591a\u5a92\u4f53\u4e1a\u52a1\u3002UMTS\u4f7f\u7528ITU\u5206\u914d\u7684\u3001\u9002\u7528\u4e8e\u9646\u5730\u548c\u536b\u661f\u65e0\u7ebf\u901a\u4fe1\u7684\u9891\u5e26\u3002\u5b83\u53ef\u901a\u8fc7\u79fb\u52a8\u6216\u56fa\u5b9a\u3001\u516c\u7528\u6216\u4e13\u7528\u7f51\u7edc\u63a5\u5165\uff0c\u4e0eGSM\u548cIP\u517c\u5bb9\u3002UMTS\u53ef\u652f\u6301\u9ad8\u8fbe2Mb\/s\u7684\u6570\u636e\u901f\u7387\uff0c\u4e0eIP\u7ed3\u5408\u5c06\u66f4\u597d\u5730\u652f\u6301\u4ea4\u4e92\u5f0f\u591a\u5a92\u4f53\u4e1a\u52a1\u548c\u5176\u4ed6\u5bbd\u5e26\u5e94\u7528\uff08\u5982\u53ef\u89c6\u7535\u8bdd\u548c\u4f1a\u8bae\u7535\u89c6\u7b49\uff09\u3002\u5b9e\u9645\u4e0a\uff0c\u53ea\u8981\u6709\u8db3\u591f\u7684\u5e26\u5bbd\uff0cUMTS\u53ef\u652f\u6301\u66f4\u9ad8\u7684\u901f\u7387\u3002\u4f8b\u5982\uff0c\u5728UMTS\u53d1\u5c55\u7684\u9ad8\u7ea7\u9636\u6bb5\uff0c\u91c7\u7528LAN\uff08\u5fae\u6ce2\u6216\u7ea2\u5916\uff09\u6280\u672f\uff0c\u53ef\u4f7f\u7cfb\u7edf\u901f\u7387\u9ad8\u8fbe155Mb\uff0fs\u3002\u9884\u8ba1\u52302003\u5e74\u4ee5\u540e\uff0cUMTS\u6709\u671b\u6295\u5165\u4f7f\u7528\u3002<\/p>\n<p>\u5bbd\u5e26\u5e7f\u57df\u7f51<br \/>\n1.LMDS<br \/>\nLMDS\uff08\u672c\u5730\u591a\u70b9\u5206\u914d\u4e1a\u52a1\uff09\u662f\u4e00\u79cd\u5fae\u6ce2\u7684\u5bbd\u5e26\u4e1a\u52a1\uff0c\u5de5\u4f5c\u572828GHz\u9644\u8fd1\u9891\u6bb5\uff0c\u5728\u8f83\u8fd1\u7684\u8ddd\u79bb\u53cc\u5411\u4f20\u8f93\u8bdd\u97f3\u3001\u6570\u636e\u548c\u56fe\u50cf\u7b49\u4fe1\u606f\u3002LMDS\u91c7\u7528\u4e00\u79cd\u7c7b\u4f3c\u8702\u7a9d\u7684\u670d\u52a1\u533a\u7ed3\u6784\uff0c\u5c06\u4e00\u4e2a\u9700\u8981\u63d0\u4f9b\u4e1a\u52a1\u7684\u5730\u533a\u5212\u5206\u4e3a\u82e5\u5e72\u670d\u52a1\u533a\uff0c\u6bcf\u4e2a\u670d\u52a1\u533a\u5185\u8bbe\u57fa\u7ad9\uff0c\u57fa\u7ad9\u8bbe\u5907\u7ecf\u70b9\u5230\u591a\u70b9\u65e0\u7ebf\u94fe\u8def\u4e0e\u670d\u52a1\u533a\u5185\u7684\u7528\u6237\u7aef\u901a\u4fe1\u3002\u6bcf\u4e2a\u670d\u52a1\u533a\u8986\u76d6\u8303\u56f4\u4e3a\u51e0\u516c\u91cc\u81f3\u5341\u51e0\u516c\u91cc\uff0c\u5e76\u53ef\u76f8\u4e92\u91cd\u53e0\u3002LMDS\u5c5e\u4e8e\u65e0\u7ebf\u56fa\u5b9a\u63a5\u5165\uff0c\u800c\u5b83\u6700\u5927\u7684\u7279\u70b9\u5728\u4e8e\u5bbd\u5e26\u7279\u6027\uff0c\u53ef\u7528\u9891\u8c31\u5f80\u5f80\u8fbe1GHz\u4ee5\u4e0a\uff0c\u4e00\u822c\u901a\u4fe1\u901f\u5ea6\u53ef\u4ee5\u8fbe\u52302Mbps\u3002<\/p>\n<p>2.SCDMA<br \/>\n\u65e0\u7ebf\u7528\u6237\u73af\u8def\u7cfb\u7edf\u662f\u56fd\u9645\u4e0a\u7b2c\u4e00\u5957\u540c\u65f6\u5e94\u7528\u667a\u80fd\u5929\u7ebf\uff08Smart Antenna\uff09\u6280\u672f\u3001\u91c7\u7528SWAP\u7a7a\u95f4\u4fe1\u4ee4\uff0c\u5229\u7528<span class=\"t_tag\" onclick=\"tagshow(event)\">\u8f6f\u4ef6<\/span>\u65e0\u7ebf\u7535\uff08Software Radio\uff09\u5b9e\u73b0\u7684\u540c\u6b65CDMA\uff08Synchronous CDMA\uff09\u65e0\u7ebf\u901a\u4fe1\u7cfb\u7edf\u3002\u7cfb\u7edf\u7531\u57fa\u7ad9\u63a7\u5236\u5668\u3001\u65e0\u7ebf\u57fa\u7ad9\u3001\u7528\u6237\u7ec8\u7aef\uff08\u591a\u7528\u6237\u56fa\u5b9a\u53f0\u3001\u5c11\u7528\u6237\u56fa\u5b9a\u53f0\u3001\u5355\u7528\u6237\u56fa\u5b9a\u53f0\u53ca\u624b\u6301\u673a\uff09\u548c\u7f51\u7edc<span class=\"t_tag\" onclick=\"tagshow(event)\">\u7ba1\u7406<\/span>\u8bbe\u5907\u7b49\u7ec4\u6210\u3002\u5355\u57fa\u7ad9\u5de5\u4f5c\u5728\u4e00\u4e2a\u7ed9\u5b9a\u7684\u8f7d\u6ce2\u9891\u7387\uff0c\u5360\u75280.5MHz\u5e26\u5bbd\uff0c\u4e3b\u8981<span class=\"t_tag\" onclick=\"tagshow(event)\">\u529f\u80fd<\/span>\u662f\u5b8c\u6210\u4e0e\u57fa\u7ad9\u63a7\u5236\u5668\u6216\u4ea4\u6362\u673a\u7684\u6709\u7ebf\u8fde\u63a5\u4ee5\u53ca\u4e0e\u7528\u6237\u7ec8\u7aef\u7684\u65e0\u7ebf\u8fde\u63a5\u3002\u57fa\u7ad9\u548c\u57fa\u7ad9\u63a7\u5236\u5668\u901a\u8fc7E1\u63a5\u53e3\uff082Mbps\uff09\u4ee5R2\u6216V5\u63a5\u53e3\u4fe1\u53f7\u63a5\u5165PSTN\u7f51\u3002\u57fa\u7ad9\u4e0e\u7528\u6237\u7ec8\u7aef\u7684\u7a7a\u4e2d\u63a5\u53e3\u4f7f\u7528SWAP\u4fe1\u4ee4\uff0c\u4ee5\u65e0\u7ebf\u65b9\u5f0f\u4e3a\u7528\u6237\u63d0\u4f9b\u8bdd\u97f3\u3001\u4f20\u771f\u548c\u4f4e\u901f\u6570\u636e\u4e1a\u52a1\u3002\u591a\u7528\u6237\u7ec8\u7aef\u8fd8\u5177\u6709\u5185\u90e8\u4ea4\u6362\u529f\u80fd\uff08\u5373\u540c\u4e00\u591a\u7528\u6237\u56fa\u5b9a\u53f0\u7684\u7528\u6237\u5f7c\u6b64\u547c\u53eb\u4e0d\u5360\u7528\u7a7a\u4e2d\u7801\u9053\uff09\u3002\u7f51\u7edc\u7ba1\u7406\u5b8c\u6210\u7cfb\u7edf\u7684\u914d\u7f6e\u7ba1\u7406\u3001\u6545\u969c\u7ba1\u7406\u3001\u6570\u636e\u7ef4\u62a4\u53ca\u5b89\u5168\u7ba1\u7406\u7b49\u529f\u80fd\u3002<\/p>\n<p>3.WCDMA<br \/>\nWCDMA\uff08\u5bbd\u5e26\u5206\u7801\u591a\u5de5\u5b58\u53d6\uff09\u5168\u540d\u662fWideband CDMA\uff0c\u5b83\u53ef\u652f\u6301384Kbps\u52302Mbps\u4e0d\u7b49\u7684\u6570\u636e\u4f20\u8f93\u901f\u7387\uff0c\u5728\u9ad8\u901f\u79fb\u52a8\u7684\u72b6\u6001\uff0c\u53ef\u63d0\u4f9b384Kbps\u7684\u4f20\u8f93\u901f\u7387\uff0c\u5728\u4f4e\u901f\u79fb\u52a8\u6216\u662f\u5ba4\u5185\u73af\u5883\u4e0b\uff0c\u5219\u53ef\u63d0\u4f9b\u9ad8\u8fbe2Mbps\u7684\u4f20\u8f93\u901f\u7387\u3002\u6b64\u5916\uff0c\u5728\u540c\u4e00\u4f20\u8f93\u901a\u9053\u4e2d\uff0c\u5b83\u8fd8\u53ef\u4ee5\u63d0\u4f9b\u7535\u8def\u4ea4\u6362\u548c\u5206\u5305\u4ea4\u6362\u7684\u670d\u52a1\uff0c\u56e0\u6b64\uff0c\u6d88\u8d39\u8005\u53ef\u4ee5\u540c\u65f6\u5229\u7528\u4ea4\u6362\u65b9\u5f0f\u63a5\u542c\u7535\u8bdd\uff0c\u7136\u540e\u4ee5\u5206\u5305\u4ea4\u6362\u65b9\u5f0f\u8bbf\u95ee\u56e0\u7279\u7f51\u3002\u8fd9\u6837\u7684\u6280\u672f\u53ef\u4ee5\u63d0\u9ad8\u79fb\u52a8\u7535\u8bdd\u7684\u4f7f\u7528\u6548\u7387\uff0c\u4f7f\u5f97\u6211\u4eec\u53ef\u4ee5\u8d85\u8d8a\u5728\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u505a\u8bed\u97f3\u6216\u6570\u636e\u4f20\u8f93\u7684\u670d\u52a1\u9650\u5236\u3002<\/p>\n<p>4.\u5bbd\u5e26\u534f\u8bae\u7684\u6bd4\u8f83<br \/>\n\u4e00\u822c\u60c5\u51b5\u4e0b\u770b\uff0cLMDS\u591a\u7528\u4e8e\u56e0\u7279\u7f51\u8bbf\u95ee\uff0cSCDMA\u591a\u7528\u4e8e\u89c6\u9891\u4f1a\u8bae\uff0cWCDMA\u591a\u7528\u4e8e\u53ef\u89c6\u79fb\u52a8\u7535\u8bdd\u3002\u5f53\u71363\u8005\u90fd\u53ef\u5b9e\u73b0\u8fd9\u4e9b\u529f\u80fd\u3002\u4e0d\u8fc7\u76ee\u524d\u9664\u4e86LMDS\u5c1a\u53ef\u5728\u56fd\u5185\u89c1\u5230\uff0c\u5176\u4f59\u7684\u6050\u6015\u8981\u8fc7\u4e24\u5e74\u624d\u80fd\u89c1\u5230\u3002<\/p>\n<p>\u5c40\u57df\u7f51<br \/>\n1.Bluetooth<br \/>\n\u84dd\u7259\uff0c\u5927\u5bb6\u4e00\u5b9a\u542c\u8bf4\u8fc7\u5427\u3002\u8fd9\u79cd\u7cfb\u7edf\u662f\u4f7f\u7528\u6269\u9891\uff08spread spectrum\uff09\u6280\u672f\uff0c\u5728\u643a\u5e26\u578b\u88c5\u7f6e\u548c\u533a\u57df\u7f51\u7edc\u4e4b\u95f4\u63d0\u4f9b\u4e00\u4e2a\u5feb\u901f\u800c\u5b89\u5168\u7684\u77ed\u8ddd\u79bb\u65e0\u7ebf\u7535\u8fde\u63a5\u3002\u5b83\u63d0\u4f9b\u7684\u670d\u52a1\u5305\u62ec\u7f51\u9645\u7f51\u7edc\uff08Internet\uff09\u3001\u7535\u5b50\u90ae\u4ef6\u3001\u5f71\u50cf\u548c\u6570\u636e\u4f20\u8f93\u4ee5\u53ca\u8bed\u97f3\u5e94\u7528\uff0c\u5ef6\u4f38\u5bb9\u7eb3\u4e8e3\u4e2a\u5e76\u884c\u4f20\u8f93\u768464kb\/s PCM\u901a\u9053\u4e2d\uff0c\u63d0\u4f9b1Mbps\u7684\u6d41\u91cf\u3002\u8fd9\u4e00\u89c2\u5ff5\u5df2\u88ab2000\u4e2a\u5de6\u53f3\u7684\u4e0d\u540c\u7528\u6237\u7ec4\u7ec7\u6240\u91c7\u7528\uff0c\u5e76\u83b7\u5f97\u8bb8\u591a\u4e3b\u8981\u534a\u5bfc\u4f53\u5236\u9020\u5382\u5bb6\u7684\u652f\u6301\u3002<\/p>\n<p>\u84dd\u7259\u65e0\u7ebf\u6280\u672f\u65e2\u652f\u6301\u70b9\u5230\u70b9\u8fde\u63a5\uff0c\u53c8\u652f\u6301\u70b9\u5230\u591a\u70b9\u7684\u8fde\u63a5\u3002\u8574\u85cf\u5728\u7b14\u8bb0\u672c<span class=\"t_tag\" onclick=\"tagshow(event)\">\u7535\u8111<\/span>\u3001Palm\u548cPDA\u3001<span class=\"t_tag\" onclick=\"tagshow(event)\">Windows<\/span> CE\u8bbe\u5907\u3001\u8702\u7a9d\u624b\u673a\u3001PCS\u7535\u8bdd\u53ca\u5176\u4ed6\u5916\u8bbe\u7684\u8f6c\u53d1\u8bbe\u5907\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u8fd9\u4e9b\u8bbe\u5907\u5728\u5404\u79cd\u7f51\u7edc\u73af\u5883\u4e2d\u8fdb\u884c\u901a\u8baf\u3002\u73b0\u5728\u7684\u89c4\u8303\u5141\u8bb87\u4e2a\u201c\u4ece\u5c5e\u201d\u8bbe\u5907\u548c\u4e00\u4e2a\u201c\u4e3b\u201d\u8bbe\u5907\u8fdb\u884c\u901a\u8baf\u3002\u51e0\u4e2a\u8fd9\u6837\u7684\u5c0f\u7f51\u7edc\uff08piconet\uff09\u4e5f\u53ef\u4ee5\u8fde\u63a5\u5728\u4e00\u8d77\uff0c\u901a\u8fc7\u7075\u6d3b\u7684\u914d\u7f6e\u5f7c\u6b64\u8fdb\u884c\u6c9f\u901a\u3002\u5728\u540c\u4e00\u4e2a\u5c0f\u7f51\u7edc\u4e2d\u7684\u8bbe\u5907\u6709\u540c\u6b65\u7684\u4f18\u5148\u6743\uff0c\u4f46\u662f\u5176\u4ed6\u8bbe\u5907\u4e5f\u53ef\u4ee5\u901a\u8fc7<span class=\"t_tag\" onclick=\"tagshow(event)\">\u8bbe\u7f6e<\/span>\uff0c\u5728\u4efb\u4f55\u65f6\u5019\u52a0\u5165\u5176\u4e2d\u3002\u8fd9\u79cd\u7f51\u7edc\u7684\u62d3\u6251\u7ed3\u6784\u53ef\u4ee5\u88ab\u63cf\u8ff0\u4e3a\u4e00\u4e2a\u7531\u7075\u6d3b\u7684\u3001\u591a\u4e2a\u5c0f\u7f51\u7edc\u7ec4\u6210\u7684\u7ed3\u6784\u3002\u66f4\u8fdb\u4e00\u6b65\uff0c\u5c0f\u7f51\u7edc\u6216\u8005\u5355\u4e2a\u8bbe\u5907\u53ef\u4ee5\u548c\u56fa\u5b9a\u7684\u4f7f\u7528\u84dd\u7259\u65e0\u7ebf\u6280\u672f\u7684\u8bbf\u95ee\u70b9\uff08Access Points\uff09\u53ca\u9644\u8fd1\u5176\u4ed6\u84dd\u7259\u5c0f\u7f51\u7edc\u76f8\u8fde\u3002<\/p>\n<p>2.IEEE802.11<\/p>\n<p>IEEE802.11\u662f1999\u5e74\u6700\u65b0\u7248\u672c\u7684\u65e0\u7ebf\u7f51\u7edc\u6807\u51c6\u3002IEEE802.11\u65e0\u7ebf\u7f51\u7edc\u6807\u51c6\u4e8e1997\u5e74\u9881\u5e03\uff0c\u5f53\u65f6\u89c4\u5b9a\u4e86\u4e00\u4e9b\u8bf8\u5982\u4ecb\u8d28\u63a5\u5165\u63a7\u5236\u5c42\u529f\u80fd\u3001\u6f2b\u6e38\u529f\u80fd\u3001\u81ea\u52a8\u901f\u7387\u9009\u62e9\u529f\u80fd\u3001\u7535\u6e90\u6d88\u8017\u7ba1\u7406\u529f\u80fd\u3001\u4fdd\u5bc6\u529f\u80fd\u7b49\u30021999\u5e74\u65e0\u7ebf\u7f51\u7edc\u56fd\u9645\u6807\u51c6\u7684\u66f4\u65b0\u53ca\u5b8c\u5584\uff0c\u8fdb\u4e00\u6b65\u89c4\u8303\u4e86\u4e0d\u540c\u9891\u70b9\u7684\u4ea7\u54c1\u53ca\u66f4\u9ad8\u7f51\u7edc\u901f\u7387\u4ea7\u54c1\u7684\u5f00\u53d1\u548c\u5e94\u7528\uff0c\u9664\u539fIEEE802.11\u7684\u5185\u5bb9\u4e4b\u5916\uff0c\u589e\u52a0\u4e86\u57fa\u4e8eSNMP\uff08\u7b80\u5355\u7f51\u7edc\u7ba1\u7406\u534f\u8bae\uff09\u534f\u8bae\u7684\u7ba1\u7406\u4fe1\u606f\u5e93\uff08MIB\uff09\uff0c\u4ee5\u53d6\u4ee3\u539fOSI\u534f\u8bae\u7684\u7ba1\u7406\u4fe1\u606f\u5e93\uff0c\u53e6\u5916\u8fd8\u589e\u52a0\u4e86\u9ad8\u901f\u7f51\u7edc\u5185\u5bb9\u3002IEEE802.11\u5206IEEE802.11a\u548cIEEE802.11b\u3002<\/p>\n<p>IEEE802.11a\u89c4\u5b9a\u7684\u9891\u70b9\u4e3a5GHz\uff0c\u7528\u6b63\u4ea4\u9891\u5206\u590d\u7528\u6280\u672f\uff08OFDM\uff09\u6765\u8c03\u5236\u6570\u636e\u6d41\u3002OFDM\u6280\u672f\u7684\u6700\u5927\u4f18\u52bf\u662f\u5176\u65e0\u4e0e\u4f26\u6bd4\u7684\u591a\u9014\u5f84\u56de\u58f0\u53cd\u5c04\uff0c\u56e0\u6b64\uff0c\u7279\u522b\u9002\u5408\u4e8e\u5ba4\u5185\u53ca\u79fb\u52a8\u73af\u5883\uff1bIEEE802.11b\u5de5\u4f5c\u4e8e2.4GHz\u9891\u70b9\uff0c\u91c7\u7528\u8865\u507f\u7801\u5065\u63a7CCK\u8c03\u5236\u6280\u672f\u3002\u5f53\u5de5\u4f5c\u7ad9\u4e4b\u95f4\u7684\u8ddd\u79bb\u8fc7\u957f\u6216\u5e72\u6270\u8fc7\u5927\uff0c\u4fe1\u566a\u6bd4\u4f4e\u4e8e\u67d0\u4e2a\u9650\u503c\u65f6\uff0c\u5176\u4f20\u8f93\u901f\u7387\u53ef\u4ece11Mb\/s\u81ea\u52a8\u964d\u81f35.5Mb\/s\uff0c\u6216\u8005\u518d\u964d\u81f3\u76f4\u63a5\u5e8f\u5217\u6269\u9891\u6280\u672f\u76842Mb\/s\u53ca1Mb\/s\u901f\u7387\u3002<\/p>\n<p>3.IrDA<br \/>\nIrDA\u662f\u4e00\u5236\u5b9a\u7ea2\u5916\u7ebf\u4f20\u8f93\u6807\u51c6\u7684\u7ec4\u7ec7\u3002<br \/>\nIrDA\u4f20\u8f93\u6807\u51c6\u7684\u7279\u70b9\u4e3a\uff1a<br \/>\n\u4f20\u8f93\u901f\u7387\u6bcf\u79d2115KB\uff0c\u4f20\u8f93\u89d2\u5ea6\u4e3a30\u5ea6\uff0c\u70b9\u5bf9\u70b9\u534a\u53cc\u5de5\u4f20\u8f93\u3002Serial Port\u987b\u670916550 UART\uff0c\u6700\u5927\u4f20\u8f93\u8ddd\u79bb1\u7c73\u3002<\/p>\n<p>4.\u51e0\u79cd\u534f\u8bae\u7684\u6bd4\u8f83<br \/>\n\u4e0d\u96be\u770b\u51fa\uff0c\u53ea\u6709IEEE802.11\u9002\u5408\u7ec4\u5efa\u65e0\u7ebf\u5c40\u57df\u7f51\uff0c\u56e0\u4e3a\u5b83\u7684\u4f20\u8f93\u901f\u7387\u8981\u8fdc\u9ad8\u4e8eBluetooth\u3002\u4e0d\u8fc7\u6050\u6015IrDA\u6709\u88abBluetooth\u4ee3\u66ff\u7684\u53ef\u80fd\uff0c\u56e0\u4e3aIrDA\u53ea\u80fd\u70b9\u5bf9\u70b9\u8fdb\u884c\u4f20\u8f93\uff0c\u800cBluetooth\u53ef\u4e00\u70b9\u5bf9\u591a\u70b9\uff0c\u5e76\u4e14\u4f20\u8f93\u901f\u5ea6\u8fdc\u9ad8\u4e8eIrDA\u3002<\/p>\n<p>\u65e0\u7ebf\u662f\u53d1\u5c55\u7684\u8d8b\u52bf\uff0c\u5c06\u6765\uff0c\u4e00\u5207\u90fd\u53ef\u4ee5\u505a\u5230\u65e0\u7ebf\uff0c\u4e0d\u7528\u518d\u53d7\u65f6\u95f4\u548c\u5730\u57df\u7684\u9650\u5236\uff0c\u4efb\u610f\u9068\u6e38\u3002<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u65e0\u7ebf\u901a\u4fe1\u662f\u4eba\u4eec\u68a6\u5bd0\u4ee5\u6c42\u7684\u6280\u672f\uff0c\u6709\u4e86\u5b83\uff0c\u6211\u4eec\u5728\u8fdb\u884c\u6570\u636e\u4ea4\u6362\u65f6\u5c31\u4e0d\u5fc5\u53d7\u65f6\u95f4\u548c\u7a7a\u95f4\u7684\u9650 &hellip;<\/p>\n<p class=\"read-more\"><a href=\"http:\/\/zerobox.org\/notes\/114.html\">\u7ee7\u7eed\u9605\u8bfb &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[115],"class_list":["post-114","post","type-post","status-publish","format-standard","hentry","tag-115"],"views":722,"_links":{"self":[{"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/posts\/114","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/comments?post=114"}],"version-history":[{"count":0,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/posts\/114\/revisions"}],"wp:attachment":[{"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/media?parent=114"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/categories?post=114"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/zerobox.org\/notes\/wp-json\/wp\/v2\/tags?post=114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}