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臾댁꽑LAN��� ISM����뿭�뿉�꽌 洹쇨굅由� �뜲�씠�꽣 �넚�닔�떊 �닔�떒�쑝濡� 珥덇린�뿉�뒗 2.4GHz����뿭�뿉�꽌 Infrared 諛� FHSS(Frequency Hopping Spreading Spectrum)諛⑹떇�쓽 湲곗닠�씠 �씠�슜�릺�뿀�쑝硫�, 珥덇린 愿��젴 遺��뭹�쓽 媛�寃� 諛� �쟾�넚�냽�룄�쓽 �젣�븳�쑝濡� 留롮씠 �솢�슜 �릺吏� 紐삵뻽�떎. 洹몃윭�굹, IEEE 802.11b�쓽 DSSS(Direct Sequency Spread Spectrum)諛⑹떇�씠 11Mbps源뚯���쓽 �냽�룄瑜� �젣怨듯븯硫댁꽌 �씪諛� �넻�떊�떆�옣�뿉�꽌 臾댁꽑LAN�뿉 ����빐 愿��떖�쓣 媛�吏�寃� �릺�뿀�떎. �삉�븳 11Mbps�쓽 ����몴�쟻�씤 Chip踰ㅻ뜑�씤 Intersil�궗�쓽 遺��뭹�쓽 ���媛�怨듦툒�쑝濡� �떆�옣 諛� 媛쒕컻�뾽泥닿�� 湲됱냽�엳 利앷���븯����쑝硫� �뵲�씪�꽌 �옣鍮꾧��寃⑸룄 留롮씠 �븯�씫�븯�뿬 WNIC (Wireless Network Interface Card)�쓽 寃쎌슦�뒗 100 �떖�윭 �젙�룄�뿉�꽌 AP(Access Point) 寃쎌슦 300節�500�떖�윭 �젙�룄�뿉�꽌 �떆�옣�씠 �삎�꽦�릺怨� �엳�쑝硫�, 異뷀썑 �뜑 �븯�씫 �맆 寃껋쑝濡� 怨좊젮�맂�떎.
�븳�렪 5GHz 臾댁꽑LAN�쓽 寃쎌슦�뒗 2.4GHz����뒗 �떖由� �쑀�읇 痢� �뾽泥대뱾�씠 二쇰룄 �븯怨좎엳�쑝硫�, 李⑥꽭��� 臾댁꽑LAN�쑝濡� 理쒓퀬 54Mbps�쓽 �냽�룄瑜� �젣怨� �븷 �닔 �엳�떎. 1999�뀈 誘멸뎅��� IEEE 802.11a�뿉�꽌 5GHz 臾댁꽑LAN�쓽 �몴以��쑝濡� 梨꾪깮�븯����쑝硫�, �쑀�읇��� 1997�뀈遺��꽣 BRAN �봽濡쒖젥�듃�쓽 �씪愿��쑝濡� 5GHz HIPERLAN�뿉 ����븳 �뿰援щ�� 吏꾪뻾�븯�뿬 �쁽�옱 HIPERLAN/2�뿉 ����븳 湲곗닠媛쒕컻 諛� �몴以��솕媛� 吏꾪뻾�릺怨� �엳�떎. �씪蹂� �삉�븳 MMAC(Multimedia Mobile Access Communication)�쓽 �븯�굹濡� 5GHz 臾댁꽑LAN�뿉 ����븳 �뿰援щ�� 吏��냽�븯����쑝硫� 理쒓렐 5GHz BMAS(Broadband Multimedia Access System)�뿉 ����븳 二쇳뙆�닔 諛곗젙�쓣 �븯湲곕룄 �븯����떎.
1. 誘멸뎅 IEEE 802.11 �룞�뼢
�쁽�옱 誘멸뎅�쓽 寃쎌슦 臾댁꽑LAN��� IEEE 802.11瑜� 以묒떖�쑝濡� �솢諛쒗엳 �뿰援щ릺怨� �엳�쑝硫�, 洹� 二쇱슂 WG(working Group) 諛� �솢�룞 �궡�슜��� �떎�쓬 <洹몃┝1>���(�깮�왂)
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