銆�銆�鏍规摎(j霉)绡�(ji茅)榛炶í鍟忎俊閬撴柟寮忕殑鐒＄窔鍌虫劅鍣ㄧ恫(w菐ng)绲�(lu貌)MAC鍗�(xi茅)璀板垎椤�

銆�銆�鐩�鍓嶉嚌灏嶄笉鍚岀殑鍌虫劅鍣�">鍌虫劅鍣ㄧ恫(w菐ng)绲�(lu貌)鎳�(y墨ng)鐢�锛岀爺绌朵汉鍝″緸涓嶅悓鐨勬柟闈㈡彁鍑轰簡澶氱óMAC鍗�(xi茅)璀�锛屼絾鐩�鍓嶅皪WSN鐨凪AC鍗�(xi茅)璀伴倓缂轰箯涓�鍊嬬当(t菕ng)涓�鐨勫垎椤炴柟寮�銆傛湰绡�(ji茅)鎻愬嚭鐨凪AC鍒嗛�炴柟娉曟槸鏍规��(j霉)绡�(ji茅)榛炶í鍟忎俊閬撶殑鏂瑰紡锛氱郸绡�(ji茅)榛炲垎閰嶅浐瀹氱殑鐒＄窔淇￠亾閭勬槸绡�(ji茅)榛為毃姗熺�剁埈瑷�鍟忎俊閬�锛屽皣WSN鐨凪AC鍗�(xi茅)璀板垎鐐�4椤烇細鍩轰簬绔剁埈锛圕ontention-based锛夌殑MAC鍗�(xi茅)璀�锛涘熀浜庤��(di脿o)搴︾畻娉曪紙Scheduling-based锛夌殑MAC鍗�(xi茅)璀帮紱闈炵�版挒锛圕ollision free锛夌殑MAC鍗�(xi茅)璀�锛涙贩鍚堬紙Hybrid scheme锛夌殑MAC杈﹁�般��

銆�銆�鐒＄窔鍌虫劅鍣ㄧ恫(w菐ng)绲�(lu貌)MAC鍗�(xi茅)璀板垎椤炩�斺�斿熀浜庣�剁埈鐨凪AC鍗�(xi茅)璀�

銆�銆�澶氭暩(sh霉)鍒嗗竷寮廙AC鍗�(xi茅)璀伴噰鐢ㄨ級娉㈠伒鑱芥垨娌栫獊閬垮厤姗熷埗骞堕噰鐢ㄩ檮鍔犵殑淇′护鎺у埗娑堟伅渚嗚檿鐞嗛毐钘忓拰鏆撮湶绡�(ji茅)榛炲晱椤�?锛涱媱璇熷亖搴猄姗熻í鍟忕殑MAC鍗�(xi茅)璀版槸绡�(ji茅)榛為渶瑕佺櫦(f膩)閫佹暩(sh霉)鎿�(j霉)鏅傦紝閫氶亷绔剁埈鏂瑰紡浣跨敤鐒＄窔淇￠亾銆侷EEE802.11 MAC鍗�(xi茅)璀伴噰鐢ㄥ付娌栫獊閬垮厤鐨勮級娉㈠伒鑱藉�氳矾瑷�鍟忥紙Carrier SensorMultiple Access with Collision Avoidance锛孋SMA/CA锛夋槸鍏稿瀷鐨勫熀浜庣�剁埈MAC鍗�(xi茅)璀�銆傚湪IEEES02.11 MAC鍗�(xi茅)璀扮殑鍩虹��(ch菙)涓婏紝鐮旂┒浜哄摗鎻愬嚭浜嗚ū澶氱敤浜庡偝鎰熷櫒">鍌虫劅鍣ㄧ恫(w菐ng)绲�(lu貌)鐨勫熀浜庣�剁埈鐨凪AC鍗�(xi茅)璀�锛屼緥濡傦細S-MAC鍗�(xi茅)璀�銆乀-MAC鍗�(xi茅)璀般�丄RC-MAC鍗�(xi茅)璀�銆丼ift-MAC鍗�(xi茅)璀�銆乄ise-MAC鍗�(xi茅)璀扮瓑銆�

銆�銆�鐒＄窔鍌虫劅鍣ㄧ恫(w菐ng)绲�(lu貌)MAC鍗�(xi茅)璀板垎椤炩�斺�斿熀浜嶤SMA/CA鐨凪AC鍗�(xi茅)璀�

銆�銆�CSMA/CA涓昏�佹��(y墨ng)鐢ㄤ簬鐒＄窔灞�鍩熺恫(w菐ng)IEEE802.11MAC鍗�(xi茅)璀板湪鍒嗗竷寮忓崝(xi茅)鍑嬶紙Distributed Coordination Function锛孌CF锛夊伐浣滄ā寮忎笅鐨勪竴绋�鍗�(xi茅)璀�銆傚湪DCF宸ヤ綔妯″紡涓�锛岀瘈(ji茅)榛炲湪鍋佃伣鍒扮劇绶氫俊閬撳繖涔嬪悗锛岄噰鐢–SMA/CA姗熷埗鍜岄毃姗熼��閬跨畻娉�锛屽�︾��(xi脿n)鐒＄窔淇￠亾鐨勫叡浜�銆�

銆�銆�IEEE802.15.4鍩烘湰涓婃槸鎳�(y墨ng)鐢ㄩ�炰技IEEF802.11鐨凜SMA/CA鏂瑰紡绔剁埈閫氫俊锛岀瘈(ji茅)榛炲畾鏈熷伒鑱戒俊閬擄紝鎺ユ敹Beacon骞�銆傚湪娌掓湁鏁�(sh霉)鎿�(j霉)鐧�(f膩)閫佸拰鎺ユ敹鏅傞��(j矛n)鍏ヤ紤鐪犺綁(zhu菐n)鑷猴紝鍗�(xi茅)瑾�(di脿o)鍣�锛圕oordinator锛夌珐瀛樼櫦(f膩)寰�浼戠湢绡�(ji茅)榛炵殑鏁�(sh霉)鎿�(j霉)锛屽畾鏈熺櫦(f膩)閫丅eacon骞�锛屽箑鏀滃付閫欎簺鏁�(sh霉)鎿�(j霉)鐨勭洰鐨勭瘈(ji茅)榛炲湴鍧�锛岀瘈(ji茅)榛炵櫦(f膩)鐝�(xi脿n)鍗�(xi茅)瑾�(di脿o)鍣ㄧ珐瀛樹簡鐧�(f膩)寰�鑷�宸辩殑鏁�(sh霉)鎿�(j霉)涔嬪悗锛屽悜鍏剁櫦(f膩)閫丳OLL骞�锛岃〃绀鸿嚜宸卞彲浠ユ帴鏀舵暩(sh霉)鎿�(j霉)锛屽崝(xi茅)鍑嬪櫒鍦ㄦ敹鍒癙OLL骞�涔嬪悗锛岄�栧厛鍚戠瘈(ji茅)榛炵櫦(f膩)閫丄CK骞�锛岄毃鍚庣櫦(f膩)閫佺珐瀛樼殑鏁�(sh霉)鎿�(j霉)锛屽湪鏀跺埌鏁�(sh霉)鎿�(j霉)涔嬪悗锛岀瘈(ji茅)榛炲悜鍗�(xi茅)瑾�(di脿o)鍣ㄧ櫦(f膩)閫丄CK骞�銆�

銆�銆�鐒＄窔鍌虫劅鍣ㄧ恫(w菐ng)绲�(lu貌)MAC鍗�(xi茅)璀板垎椤炩�斺�擲-MAC鍗�(xi茅)璀�

銆�銆�S-MAC锛圫ensor-MAC锛夊崝(xi茅)璀版槸杓冩棭鐨勯嚌灏峎SN鐨勪竴绋甅AC鍗�(xi茅)璀帮紝浠栨槸鍦�802.11MAC鐨勫熀绀�(ch菙)涓�锛岄噰鐢ㄤ笅闈�浠嬬垂鐨勫�氱ó姗熷埗渚嗘笡灏戜簡绡�(ji茅)榛炶兘閲忕殑娑堣�椼�傚浐瀹氬懆鏈熸�х殑鍋佃伣鍜岀潯鐪狅細鐐轰簡娓涘皯鑳介噺鐨勬秷鐗�锛屽偝鎰熷櫒">鍌虫劅鍣ㄧ瘈(ji茅)榛炶�佺洝閲忚檿浜庝綆鍔熺墻鐨勭潯鐪犵媭鎱�(t脿i)銆係-MAC鍗�(xi茅)璀伴噰鐢ㄤ簡浣庡崰绌烘瘮鐨勫懆鏈熸�х潯鐪�/鍋佃伣銆傜偤浜嗕娇寰桽-MAC鍗�(xi茅)璀板叿鏈夎壇濂界殑鎿村睍鎬�锛屽湪瑕嗚搵缍�(w菐ng)绲�(lu貌)涓�褰㈡垚鐪惧�氫笉鍚岀殑铏涙摤绨囥��

銆�銆�娑堟伅鍌抽仦鎶�琛�(sh霉)锛氬皪浜庣劇绶氫俊閬�锛屽偝杓稿樊閷�鑸囧寘闀峰害鎴愭�ｆ瘮锛岀煭鍖呮垚鍔熷偝杓�?sh霉)姣嶆�曞�ゎ�撶�ラ檪L鍖�銆傚湪S-MAC鍗�(xi茅)璀颁腑娑堟伅鍌抽仦鎶�琛�(sh霉)灏囬暦娑堟伅鍒嗘垚鑻ュ共鐭�鍖�锛屽埄鐢≧TS/CTS鎻℃墜姗熷埗锛屼竴娆℃�х櫦(f膩)閫佹暣鍊嬮暦娑堟伅锛岄�欐ǎ鏃㈡彁楂樼櫦(f膩)閫佹垚鍔熺巼锛屾湁娓涘皯浜嗘帶鍒舵秷鎭�銆傛祦閲忚嚜閬╂噳(y墨ng)鍋佃伣姗熷埗锛氬偝鎰熷櫒">鍌虫劅鍣ㄧ瘈(ji茅)榛炲湪鑸囬劙灞呯瘈(ji茅)榛為�氫俊绲�(ji茅)鏉熷悗涓嶇珛鍗抽��(j矛n)鍏ョ潯鐪犵媭鎱�(t脿i)锛岃�屼繚鎸佸伒鑱戒竴娈垫檪闁�锛岄噰鐢ㄦ祦閲忚嚜閬╂噳(y墨ng)鍋佃伣姗熷埗锛屾笡灏戜簡缍�(w菐ng)绲�(lu貌)涓�鐨勫偝杓稿欢閬�銆�

銆�銆�S-MAC鍗�(xi茅)璀拌垏IEEE802.11 MAC鐩告瘮锛屽湪绡�(ji茅)鑳芥柟闈㈡湁浜嗗緢澶х殑鏀瑰杽銆備絾鐫＄湢姗熷埗鐨勫紩鍏ワ紝浣垮緱缍�(w菐ng)绲�(lu貌)鐨勫偝杓稿欢閬插�炲��锛屽悶鍚愰噺涓嬮檷銆傞嚌灏峉-MAC鍗�(xi茅)璀板瓨鍦ㄧ殑涓嶈冻锛岀爺绌朵汉鍝″皪鍏堕��(j矛n)琛屼簡鏀归��(j矛n)锛屾彁鍑轰簡涓�绋�甯舵湁鑷�閬╂噳(y墨ng)鐫＄湢鐨凷-MAC鍗�(xi茅)璀�銆�

銆�銆�鐒＄窔鍌虫劅鍣ㄧ恫(w菐ng)绲�(lu貌)MAC鍗�(xi茅)璀板垎椤炩�斺�擳-MAC鍗�(xi茅)璀�

銆�銆�T-MAC锛圱imeout-MAC锛夊崝(xi茅)璀拌垏鑷�閬╂��(y墨ng)鐫＄湢鐨凷-MAC鍗�(xi茅)璀板熀鏈�鎬濇兂澶ч珨鐩稿悓銆傛暩(sh霉)鎿�(j霉)鍌宠几浠嶇劧閲囩敤RTS/CTS/DATA/ACK鐨�4娆℃彙鎵嬫�熷埗锛屼笉鍚岀殑鏄�鍦ㄧ瘈(ji茅)榛炴椿鍕曠殑鏅傞殭鍏�(n猫i)鎻掑叆浜嗕竴鍊婽A锛圱ime Active锛夋檪闅�锛岃嫢TA鏅傞殭涔嬮枔娌掓湁浠讳綍鏅傞枔鐧�(f膩)鐢�锛屽墖娲诲嫊绲�(ji茅)鏉熼��(j矛n)鍏ョ潯鐪犵媭鎱�(t脿i)銆俆A鐨勫彇鍊煎皪浜嶵-MAC鍗�(xi茅)璀版�ц兘鑷抽棞(gu膩n)閲嶈��锛屽叾绱勬潫姊濅欢鐐猴細TA=m锛圕+R+T锛夛紝m>1锛屽叾涓瑿鐐虹�剁埈淇￠亾鏅傞��锛孯鐐虹櫦(f膩)閫丷TS鍒嗙祫鐨勬檪闁�锛孴鐐篟TS鍒嗙祫绲�(ji茅)鏉熷埌鐧�(f膩)鍑篊TS鍒嗙祫闁嬪�嬬殑鏅傞��銆傚湪浠跨湡鐨勬檪鍊�锛屼竴鑸�閬稿彇m=1.5锛屽嵆锛歍A=1.5

銆�銆�涓嶇�℃槸鍦ㄥ偝绲�(t菕ng)鐨勬湁绶氬眬鍩熺恫(w菐ng)锛圠AN锛変腑閭勬槸鍦ㄧ洰鍓嶆祦琛岀殑鐒＄窔灞�鍩熺恫(w菐ng)锛圵LAN锛変腑锛孧AC鍗�(xi茅)璀伴兘琚�寤ｆ硾鍦版��(y墨ng)鐢�銆傚湪鍌崇当(t菕ng)灞�鍩熺恫(w菐ng)涓�锛屽悇绋�鍌宠几浠嬭��(zh矛)鐨勭墿鐞嗗堡灏嶆噳(y墨ng)鍒扮浉鎳�(y墨ng)鐨凪AC灞�锛岀洰鍓嶆櫘閬嶄娇鐢ㄧ殑缍�(w菐ng)绲�(lu貌)閲囩敤鐨勬槸IEEE 802.3鐨凪AC灞ゆ��(bi膩o)婧�(zh菙n)锛岄噰鐢–SMA/CD瑷�鍟忔帶鍒舵柟寮�锛涜�屽湪鐒＄窔灞�鍩熺恫(w菐ng)涓�锛孧AC鎵�灏嶆噳(y墨ng)鐨勬��(bi膩o)婧�(zh菙n)鐐篒EEE 802.11锛屽叾宸ヤ綔鏂瑰紡閲囩敤DCF锛堝垎甯冩帶鍒讹級鍜孭CF锛堜腑蹇冩帶鍒讹級銆�

鏇村�氱簿褰╁��(n猫i)瀹�锛岃珛鐧诲叆缍�搴�闆诲瓙閫氾紙www.06jpkg.cn锛�