锘??xml version="1.0" encoding="utf-8" standalone="yes"?>蜜桃av一区二区在线观看,亚洲精品久久嫩草网站秘色 ,国产精品久久福利http://www.shnenglu.com/ay19880703/category/20325.htmlzh-cnFri, 18 Jan 2013 17:03:20 GMTFri, 18 Jan 2013 17:03:20 GMT60[瀵煎叆]Wireless Fundamental(2) -- 802.11 MAC澶存牸寮忚В鏋?updating)http://www.shnenglu.com/ay19880703/archive/2011/03/05/155083.html__ay__aySat, 05 Mar 2011 08:55:00 GMThttp://www.shnenglu.com/ay19880703/archive/2011/03/05/155083.htmlhttp://www.shnenglu.com/ay19880703/comments/155083.htmlhttp://www.shnenglu.com/ay19880703/archive/2011/03/05/155083.html#Feedback0http://www.shnenglu.com/ay19880703/comments/commentRss/155083.htmlhttp://www.shnenglu.com/ay19880703/services/trackbacks/155083.html 

浣滆咃細__ay 

 


鍦ㄤ笂涓綃囦腑錛岀畝瑕佹榪頒簡鏃犵嚎緗戠粶鐨勯氫俊鏈哄埗錛岄偅涔堝湪涓嬫潵灝卞緱寮濮嬩粙緇嶄竴涓嬫棤綰跨綉緇滅殑閫氫俊緇嗚妭浜嗐傝鍒拌繖閲岋紝浠ュ悗鎵璇寸殑鍐呭浼氭湁銆?02.11 鏃犵嚎緗戠粶鏉冨▉鎸囧崡 絎簩鐗堝獎鍗扮増銆嬭繖鏈功鍐呭鐨勫獎瀛愶紝榪樻湁鍐呭涓細鍔犱笂閫氳繃wireshark鎶撳寘鐨勫垎鏋愪互鍙奍EEE鍏充簬wlan 80211鍗忚鐨勮鏄庢枃妗c傝櫧鐒惰榪欐湰涔﹁櫧鐒惰寰楀ソ錛屼絾鏄緢澶氭暟鎹寘緇嗚妭涓婄殑闂榪樻槸闇瑕佹垜浠翰鎵嬪幓鍋氬疄楠屽幓楠岃瘉鐨勶紝涓鍚戣涓哄涔犱笉鑳戒粎浠呯湅涔︼紝浜叉墜鍘婚獙璇佷竴浜涗綘璁や負鐤戞儜鐨勫湴鏂瑰彲鑳戒細姣斿仛鍑犻亾璇懼悗棰樼殑鏁堟灉瑕佸ソ寰楀寰楀 ^_^


1 MAC802.11鏁版嵁甯ф牸寮?/span>

棣栧厛瑕佽鏄庣殑鏄痬ac802.11鐨勫撫鏍煎紡寰堢壒鍒紝瀹冧笌TCP/IP榪欎竴綾誨崗璁笉鍚岋紝瀹冪殑闀垮害鏄彲鍙樼殑銆備笉鍚屽姛鑳界殑鏁版嵁甯ч暱搴︿細涓嶄竴鏍楓傝繖涓鐗規ц鏄巑ac802.11鏁版嵁甯ф樉寰楁洿鍔犵伒媧伙紝鐒惰岋紝涔熶細鏇村姞澶嶆潅銆俶ac 802.11鐨勬暟鎹撫闀垮害涓嶅畾涓昏鏄敱浜庝互涓嬪嚑鐐瑰喅瀹氱殑


1.1 mac鍦板潃鏁扮洰涓嶅畾錛屾牴鎹撫綾誨瀷涓嶅悓錛宮ac 802.11鐨刴ac鍦板潃鏁頒細涓嶄竴鏍楓傛瘮濡傝 ACK甯т粎鏈変竴涓猰ac鍦板潃錛岃屾暟鎹撫鏈?涓猰ac鍦板潃錛屽湪WDS妯″紡錛堜笅闈㈣鎻愬埌錛変笅錛屽撫澶寸珶鐒舵湁4涓猰ac鍦板潃銆?/span>


1.2 802.11鐨勭鐞嗗撫鎵鎼哄甫鐨勪俊鎭暱搴︿笉瀹氾紝鍦ㄧ鐞嗗撫涓紝涓嶄粎浠呭彧鏈変竴浜涚被浼間簬mac鍦板潃錛屽垎鐗囨爣蹇椾箣綾葷殑榪欎簺淇℃伅錛岃屼笖鍙﹀榪樹細鍖呮嫭涓浜涘叾瀹冪殑淇℃伅錛岃繖浜涗俊鎭湁鍏充簬瀹夊叏璁劇疆鐨勶紝鏈夊叧浜庣墿鐞嗛氫俊鐨勶紝姣斿璇存垜浠殑SSID鍚嶇О灝辨槸閫氳繃綆$悊甯ц幏寰楃殑銆侫P浼氭牴鎹笉鍚岀殑鎯呭喌鍙戦佸寘鍚湁涓嶅悓淇℃伅鐨勭鐞嗗撫銆傜鐞嗗撫鐨勭粏鑺傞棶棰樻垜浠細鍦ㄥ悗闈㈢殑鏂囩珷涓璁猴紝榪欓噷鏆傛椂璺寵繃銆?/span>


1.3 鍔犲瘑錛坵ep,wpa絳夛級淇℃伅錛孮OS錛坬uality of service錛変俊鎭紝鑻ユ湁鍔犲瘑鐨勬暟鎹撫鏍煎紡鍜屾病鏈夊姞瀵嗙殑鏁版嵁甯ф牸寮忚繕涓嶄竴鏍鳳紝鍔犲瘑鏁版嵁甯ф牸寮忚繕澶氫簡涓姞瀵嗗ご錛岀敤浜庤В瀵嗙敤銆傜劧鍒橯OS涔熸槸鍚屾牱閬撶悊銆?/span>


绔熺劧mac 802.11鏁版嵁甯ч偅涔堝鏉傦紝鎴戜滑灝卞厛浠庨氱敤鐨勬牸寮忓紑濮嬭鍚?/span>



甯ф帶鍒?2 bytes)錛?/span>

鐢ㄤ簬鎸囩ず鏁版嵁甯х殑綾誨瀷錛屾槸鍚﹀垎鐗囩瓑絳変俊鎭紝璇寸櫧浜嗭紝榪欎釜瀛楁灝辨槸璁板綍浜唌ac 802.11鐨勫睘鎬с?/span>

    *Protocol version錛氳〃鏄庣増鏈被鍨嬶紝鐜板湪鎵鏈夊撫閲岄潰榪欎釜瀛楁閮芥槸0x00

    *Type錛氭寚鏄庢暟鎹撫綾誨瀷錛屾槸綆$悊甯э紝鏁版嵁甯ц繕鏄帶鍒跺撫

    *Subtype錛氭寚鏄庢暟鎹撫鐨勫瓙綾誨瀷錛屽洜涓哄氨綆楁槸鎺у埗甯э紝鎺у埗甯ц繕鍒哛TS甯э紝CTS甯э紝ACK甯х瓑絳夛紝閫氳繃榪欎釜鍩熷垽鏂嚭璇ユ暟鎹撫鐨勫叿浣撶被鍨?/span>

    *To DS/From DS錛氳繖涓や釜鏁版嵁甯ц〃鏄庢暟鎹寘鐨勫彂閫佹柟鍚戯紝鍒嗗洓縐嶅彲鑳芥儏鍐佃璁?/span>

        **鑻ユ暟鎹寘To DS涓?錛孎rom DS涓?錛岃〃鏄庤鏁版嵁鍖呭湪緗戠粶涓繪満闂翠紶杈?/span>

 

        **鑻ユ暟鎹寘To DS涓?錛孎rom DS涓?錛岃〃鏄庤鏁版嵁甯ф潵鑷狝P

        **鑻ユ暟鎹寘To DS涓?錛孎rom DS涓?錛岃〃鏄庤鏁版嵁甯у彂閫佸線AP

        **鑻ユ暟鎹寘To DS涓?錛孎rom DS涓?錛岃〃鏄庤鏁版嵁甯ф槸浠嶢P鍙戦佽嚜AP鐨勶紝涔熷氨鏄榪欎釜鏄釜WDS(Wireless Distribution System)鏁版嵁甯э紝鑷充簬浠涔堟槸WDS錛屽彲浠ュ弬鑰冧笅榪欓噷鐨勪粙緇?#浼犻侀棬

    *Moreflag錛氬垎鐗囨爣蹇楋紝鑻ユ暟鎹撫琚垎鐗囦簡錛岄偅涔堣繖涓爣蹇椾負1錛屽惁鍒欎負0

    *Retry錛氳〃鏄庢槸鍚︽槸閲嶅彂鐨勫撫錛岃嫢鏄負1錛屼笉鏄負0

    *PowerManage錛氬綋緗戠粶涓繪満澶勪簬鐪佺數妯″紡鏃訛紝璇ユ爣蹇椾負1錛屽惁鍒欎負0.

    *Moredata錛氬綋AP緙撳瓨浜嗗浜庣渷鐢墊ā寮忎笅鐨勭綉緇滀富鏈虹殑鏁版嵁鍖呮椂錛孉P緇欒鐪佺數妯″紡涓嬬殑緗戠粶涓繪満鐨勬暟鎹撫涓浣嶄負1錛屽惁鍒欎負0

    *Wep錛氬姞瀵嗘爣蹇楋紝鑻ヤ負1琛ㄧず鏁版嵁鍐呭鍔犲瘑錛屽惁鍒欎負0

    *Order 榪欎釜琛ㄧず鐢ㄤ簬PCF妯″紡涓嬶紝榪欓噷涓嶄簣璁ㄨ


鐢熷瓨鍛ㄦ湡/Associate ID (2 bytes):

鍏堝墠涓嶆槸璁茶繃铏氭嫙杞芥嘗鐩戝惉鐨勪竴涓満鍒朵箞錛屼粬鐨凬etwork Allocation Vector錛圢AV錛夊氨瀛樺湪榪欓噷錛岃繖閲屽彨duration錛屽嵆鐢熷瓨鍛ㄦ湡銆傚綋鐒朵笉鏄墍鏈夋椂鍊欒繖涓瓧孌靛瓨鏀劇殑NAV鍊箋傚湪鐗瑰畾綾誨瀷鏁版嵁甯т腑錛屽畠涔熷彲鑳借〃紺篈ssociate ID銆備竴鏃︽湁涓繪満鍏寵仈鍒癆P浜嗭紝AP閮戒細涓轟富鏈哄垎閰嶄竴涓狝ssociate ID銆傛瘮濡傚湪緗戠粶涓繪満閫氱煡AP鑷繁瑕佽繘鍏ョ渷鐢墊ā寮忥紙power saving錛夌殑鏃跺欙紝緗戠粶涓繪満鍙戠粰AP鐨勯氱煡鏁版嵁甯ч噷闈紝榪欎釜鍩熷氨琛ㄧず鐨勬槸Associate ID鑰屼笉鏄疦AV浜嗐傚綋鐒惰繕鍙互閫氳繃鏈楂樹綅鏉ュ垽鏂繖涓煙鐨勫惈涔夛細

    *鍦?5bit涓?鐨勬椂鍊欙紝璇ュ煙琛ㄧずduration

    *鍦?5bit涓?錛?4bit涓?鐨勬椂鍊欙紝琛ㄧずAssociate ID銆?/span>


搴忓垪鎺у埗(2 bytes錛? bits/12 bits)錛氳繖涓煙鍒?閮ㄥ垎錛屼竴涓槸鍒嗙墖搴忓垪鍙峰拰鏍囪瘑甯у垪鍙楓傚垎鐗囧簭鍒楀彿灝辨槸璁板綍鍒嗙墖搴忓彿鐨勩傛瘮濡備竴涓撫A琚垎鐗囨垚a1錛宎2錛宎3錛岄偅涔坅1錛宎2錛宎3榪欎笁涓垎鐗囧撫鐨勫垎鐗囧簭鍒楀垎鍒槸0,1,2銆傝繖涓拰IP鍒嗘鍘熺悊涓鏍風殑錛岃鍩熷崰4涓瘮鐗逛綅銆傚墿涓嬬殑12涓瘮鐗逛綅灝辯敤浜庢爣璇嗗撫鐨勫簭鍙鳳紝榪欎釜璺烮P澶撮噷闈㈢殑搴忓垪鍙蜂竴鏍楓?/span>


MAC鍦板潃 1-4 

榪欏洓涓湴鍧鍦ㄤ笉鍚屽撫涓湁涓嶅悓鍚箟銆傝繖浜涗互鍚庝細璁ㄨ銆?/span>

浠ュ悗鎴戜滑鍙兘浼氱鍒頒互涓嬬被鍨嬬殑mac鍦板潃

RA(receiver address)錛氭棤綰跨綉緇滀腑錛岃鏁版嵁甯х殑鎺ユ敹鑰?/span>

TA(transmitter address)錛氭棤綰跨綉緇滀腑錛岃鏁版嵁甯х殑鍙戦佽?/span>

BSSID(Basic Service Set ID)錛氬湪infrastructure BBS涓紝BSSID灝辨槸AP鐨刴ac鍦板潃銆備絾鏄湪IBBS涓紝瀹冩槸涓涓殢鏈哄嵆鐢熸垚鐨?6浣嶄簩榪涘埗搴忓垪錛岃繕鏈夋渶楂樹袱浣嶅垎鍒槸Universal/Local鏍囧織浣嶅拰Individual/Group鏍囧織浣嶃侷BBS鐨凚SSID涓紝Universal/Local鏍囧織浣嶄負1錛岃〃紺烘湰鍦癕AC錛孖ndividual/Group鏍囧織浣嶄負0錛岃〃紺烘槸涓漢MAC銆備篃灝辨槸璇村湪IBBS涓紝BSSID鍦板潃搴旇綾誨 10xxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxx錛坸琛ㄧず闅忔満鏁拌涔?瑕佷箞1, 2榪涘埗琛ㄧず錛?/span>

DA(destine address)錛氳甯х殑鐩殑mac鍦板潃

SA(source address)錛氳甯х殑婧恗ac鍦板潃

榪欓噷鐨凞A鍜孲A鍚箟鍜屾櫘閫氫互澶綉涓殑鍚箟涓鏍鳳紝鍦ㄦ棤綰跨綉緇滀腑鍙兘鎴戜滑闇瑕侀氳繃AP鎶婃暟鎹彂閫佸埌鍏跺畠緗戠粶鍐呯殑鏌愬彴涓繪満涓備絾鏄湁鐨勪漢浼氬鎬紝鐩存帴鍦≧A涓~榪欏彴涓繪満鐨刴ac鍦板潃涓嶅氨涔呭ソ浜嗕箞銆備絾鏄娉ㄦ剰RA鐨勫惈涔夛紝璇寸殑鏄棤綰跨綉緇滀腑鐨勬帴鏀惰咃紝涓嶆槸緗戠粶涓殑鎺ユ敹鑰咃紝涔熷氨鏄榪欏彴鐩殑涓繪満涓嶅啀鏃犵嚎緗戠粶鑼冨洿鍐呫傚湪榪欑鎯呭喌涓嬫垜浠殑RA鍙槸涓涓腑杞紝鎵浠ラ渶瑕佸鍑轟竴涓狣A瀛楁鏉ユ寚鏄庤甯х殑鏈緇堢洰鐨勫湴錛屽綋鐒訛紝濡傛灉鏈変簡DA閭e繀欏繪湁SA錛屽洜涓鴻嫢鐩殑涓繪満瑕佸洖搴旂殑璇濓紝SA瀛楁鏄繀涓嶅彲灝戠殑銆?鍋囪娌℃湁SA瀛楁錛岄偅涔堢洰鐨勪富鏈哄洖搴旂殑鏁版嵁鍖呭氨鍙兘鍙戦佸埌婧愪富鏈烘墍灞炵殑AP涓婁簡~)


鏈鍏稿瀷鐨勪竴涓緥瀛愬氨鏄湪WDS妯″紡涓嬶紝鏁版嵁甯т細鏈?涓湴鍧錛孯A錛孴A琛ㄧず鎺ユ敹绔拰鍙戦佺錛岃繖涓や釜鍦板潃鐢ㄤ簬鏃犵嚎浼犺緭鐨勬椂鍊欍傝繕鏈?涓湴鍧鏄疍A鍜孲A錛屽垎鍒窡浠ュお緗戜腑涓鏍瘋〃紺烘簮鍦板潃鍜岀洰鐨勫湴鍧銆俉DS甯х殑鏍煎紡濡備笅鍥撅細


鎵撲釜姣旀柟璇達紝AP1鏈変富鏈篈錛孉P2鏈変富鏈築銆傚鏋淎瑕佸拰B鍚屽錛岄偅涔圓浼氶鍏堝彂閫佹暟鎹撫緇橝P1錛岀劧鍚?/span>AP1鍙戦佸撫緇橝P2 銆傝繖涓椂鍊欏撫閲岄潰浼氭湁4涓湴鍧錛屽垎鍒槸RA=mac(AP2)錛孴A=mac(AP1)錛孌A=mac(B)錛孲A=mac(A)銆?/span>




__ay 2011-03-05 16:55 鍙戣〃璇勮
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[瀵煎叆]Wireless Fundamental(1) -- 802.11MAC鍏ラ棬縐戞櫘綃?/title><link>http://www.shnenglu.com/ay19880703/archive/2011/02/05/155084.html</link><dc:creator>__ay</dc:creator><author>__ay</author><pubDate>Sat, 05 Feb 2011 10:20:00 GMT</pubDate><guid>http://www.shnenglu.com/ay19880703/archive/2011/02/05/155084.html</guid><wfw:comment>http://www.shnenglu.com/ay19880703/comments/155084.html</wfw:comment><comments>http://www.shnenglu.com/ay19880703/archive/2011/02/05/155084.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/ay19880703/comments/commentRss/155084.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/ay19880703/services/trackbacks/155084.html</trackback:ping><description><![CDATA[<p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 20px; ">浣滆咃細__ay </span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">鍙傝冧功鐩槸 銆?02.11 鏃犵嚎緗戠粶鏉冨▉鎸囧崡 絎簩鐗堝獎鍗扮増銆? 涓枃鐗堢炕璇戠殑澶伓蹇冧簡銆?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px; "><br /></span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">鍦ㄦ棤綰跨綉緇滈氫俊涓紝MAC灞傜殑宸ヤ綔緇嗚妭鍜屾湁綰跨綉緇滃樊鐨勫疄鍦ㄦ槸澶ぇ浜?#8230;…</span></p><p><span style="line-height: 22px; font-size: 18px; ">榪欓噷浠呬粎璋堣鏃犵嚎MAC灞傜殑閫氫俊鏈哄埗錛孧AC浠ヤ笂鐨勬湁綰挎棤綰塊兘涓鏍穨~</span></p><p><span style="line-height: 22px; font-size: 18px; "><br /></span></p><p><strong><span style="font-size: 18px; line-height: 22px; ">1. 紲為┈鏄疪TS/CTS錛燂紵</span></strong></p><p><strong><span style="font-size: 18px; line-height: 22px; "><br /></span></strong></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 22px; font-size: 18px; ">閭d箞璇磋搗鏃犵嚎緗戣礬錛屾垜浠叾瀹炴渶鏈棣栧厛鑰冭檻閫氫俊鐨勫彲闈犳ч棶棰橈紝瑕佺煡閬撴湁綰跨綉緇滅殑浼犺緭鐜姣旀棤綰跨綉緇滃皝闂浜嗭紝浣嗘槸鍏跺彲闈犳т篃姣旀棤綰跨綉緇滈珮澶氫簡錛屾渶鏈璧風爜鏈夌嚎緗戠粶涓嶈鑰冭檻鍙兘鐨勫井娉紝鎵嬫満淇″彿絳夊洜绱犵殑騫叉壈銆傛鏄?/span><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">鐢變簬鑰冭檻鍒板叾瀹冪數瀛愯澶囨瘮濡傛墜鏈猴紝寰嘗鐐夌瓑鏈夊彂灝勫井娉㈠姛鑳界數瀛愪駭鍝侊紝鎴戜滑絀烘皵涓殑鏃犵嚎淇″彿鍙楀埌鐨勫共鎵拌繙榪滄瘮鏈夌嚎淇″彿鐨勮寮虹殑澶氥傛墍浠ュ湪鏃犵嚎閫氫俊鏃訛紝瑕佽冭檻鍒板彲鑳界殑騫叉壈鎬э紝鎵浠ラ渶瑕佸姣忎竴涓彂閫佸嚭鍘葷殑甯ц繘琛岀‘璁ゃ傝繃紼嬪氨濡備笅鍥炬墍紺恒?/span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; "> <img src="http://www.shnenglu.com/images/cppblog_com/ay19880703/20324/9fa67d502353f27543a75b07.jpg" border="0" alt="" width="851" height="304" /></span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">浣嗘槸錛屽嚭鐜頒竴涓棶棰樹竴涓鎵嬬殑闂銆傚氨鏄濡備綍澶勭悊鎵璋撶殑闅愯棌鑺傜偣鐨勯棶棰橈紝閭e暐鏄殣钘忚妭鐐瑰挧錛?/span></p><p><img src="http://www.shnenglu.com/images/cppblog_com/ay19880703/20324/693fe2e8fbd8dc6eb90e2d39.jpg" border="0" alt="" width="905" height="234" /><br /></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">鍦ㄤ笂涓涓浘涓垜浠彲浠y涓縐嶇壒孌婃儏鍐碉細 2鍙鋒満鍙互鎺ユ敹鍒?鍙峰拰3鍙風殑淇″彿錛屼絾鏄?鍙鋒満鏃犳硶鍙戠幇3鍙鋒満銆?/span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">閭d箞鍦?錛?鍙峰悓鏃跺彂閫佸撫緇?鍙鋒満鐨勬椂鍊欙紝2鍙鋒満娌℃硶鍥炲簲榪?涓撫錛屽洜涓哄撫鍐茬獊浜嗐傚湪鏃犵嚎緗戠粶閲岋紝鎵鏈変富鏈洪兘鍏敤涓涓┖姘斿獟浠嬶紝涔熷氨鏄鍦ㄤ竴涓富鏈哄彂閫佹暟鎹殑鏃跺欏叾瀹冧富鏈哄繀欏諱繚鎸佹矇榛樸傞偅涔堜笂榪拌繖縐嶆儏鍐墊樉鐒惰繚鑳屼簡榪欎釜瑙勫垯錛岄犳垚鐨勭粨鏋滃氨鏄?鍙鋒満鏍規湰娌℃硶鏀跺埌鏁版嵁銆?/span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">鎵浠ヨ繖閲屽氨鍙堝紩鍑轟竴涓互澶綉綾諱技鐨勫彟涓涓棶棰橈細鍐茬獊閬垮厤</span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">閭d箞瀵逛簬榪欑鎯呭喌鎴戜滑鍒欓渶瑕佹湁涓崗璋冩満鍒訛紝鍗忚皟璋佸厛鍙戯紝璋佸悗鍙?/span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">榪欏氨寮曞嚭浜?涓姛鑳藉撫 </span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">RTS: Request to Send</span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">CTS: Clear to Send</span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">鍦?鍙鋒満浼犻佹暟鎹箣鍓嶏紝棣栧厛鍙戦佷竴涓猂TS甯х粰2鍙鋒満錛岄偅涔堟墍鏈夋帴鏀跺埌RST甯х殑鏈哄櫒鍒欎細淇濇寔娌夐粯</span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">浣嗘槸3鍙鋒満鏀朵笉鍒頒斧~~</span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">鎵浠?鍙鋒満浼氬洖搴?鍙鋒満涓涓狢TS甯э紝3鍙鋒満鏀跺埌CTS錛屽垯淇濇寔娌夐粯錛堣繖鏍鋒墍浠ュ彲鑳藉共鎵板埌1/2鍙鋒満閫氫俊鐨勪富鏈洪兘娌夐粯浜嗭級錛岀劧鍚庢暣涓棤綰跨綉緇滃獟浠嬪氨鍙互琚┖鍑烘潵緇?鍙鋒満鐢ㄦ潵浼犻佹暟鎹撫緇?鍙鋒満浜?/span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">榪欏氨鏄疪TS/CTS鏈哄埗 鍙戦佽繃紼嬪ぇ鑷村涓?/span></p><p><img src="http://www.shnenglu.com/images/cppblog_com/ay19880703/20324/ecd5b23c5e6fa4bf3c6d9718.jpg" border="0" alt="" width="902" height="389" /><br /></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">浣嗘槸瀵逛簬榪欎釜鏈哄埗鐨勪嬌鐢ㄤ細娑堣楅澶栫殑璁$畻璧勬簮錛岄偅涔堟湁涓涓姌涓殑鍋氭硶灝辨槸璁劇疆涓涓猂TS鐨勯榾鍊鹼紝褰撶綉緇滄暟鎹寘闀垮害瓚呰繃榪欎釜闃鍊肩殑鏃跺欏氨鍚敤RTS/CTS鏈哄埗錛屽惁鍒欎繚鎸佽嚜鐢卞彂閫佹ā寮忋傦紙鎴戝彂鐜拌佸寰堝枩嬈腑搴鎬箣閬搤錛夈傚綋鐒惰繖涓満鍒跺彲鑳芥湁浜涗漢璇存棤娉曚繚璇佹病鏈夊啿紿侊紝搴斾負鍙兘1,3涓繪満鍙兘鍚屾椂鍙戦?涓猂TS鍖呯粰2鍙鋒満銆傝繖閲屼細鏈変釜鍐茬獊鍥為伩闂錛屽師鐞嗗拰浠ュお緗戠被浼鹼紝閮芥槸閬囧埌鍙戦佸啿紿侊紝閭d箞灝遍殢鏈洪夋嫨鍥為伩銆傝繖涓氨鏄笅闈㈣璁ㄨ鐨勪竴涓棶棰樹簡銆?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; "><br /></span></p><p><strong><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;">2 WLAN鐨勫啿紿佸洖閬?/span></strong></p><p><strong><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;"><br /></span></strong></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">鏃犵嚎緗戠粶閫氫俊鍙︿竴涓富瑕佺殑闂灝辨槸鍗忚皟闂錛屽氨鏄浣曞崗璋冨尯鍩熷唴鐨勫悇涓富鏈鴻繘琛岄氫俊錛屽綋鐒禦TS/CTS鏄竴縐嶈В鍐蟲満鍒訛紝浣嗘槸榪欏彧鏄釜灝忛儴鍒嗭紝鍒板簳濡備綍璁╂棤綰垮尯鍩熷唴鐨勪富鏈?#8220;嫻佺晠”鐨勯氫俊錛屽氨寰楁秹鍙婂埌涓緋誨垪鍐茬獊鍥為伩絳栫暐絳夐棶棰樹笂浜嗐?/span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">棣栧厛璇翠竴涓嬪崗璋冩ā寮忥細</span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">鍦ㄤ互澶綉涓敤鐨勬槸CSMA/DA鐨勬柟娉曪紝鎵鏈変富鏈鴻嚜鐢卞彂閫佹姤鏂囷紝鑻ュ啿紿佷簡閫閬夸竴孌墊椂闂村湪鍙戝氨鏄簡銆?/span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">鑰屽湪鏃犵嚎緗戜腑鍒欐湁3縐嶅崗璋冩ā寮?/span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">DCF (</span><span id="hvzpftn" class="Apple-style-span" style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">Distribution Coordination Function)</span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">鍖哄煙鍐呯殑涓繪満浼犺緭錛屼絾鏄窡浠ュお緗戠殑鍐茬獊閬垮厤涓鏍鳳紝鍦ㄦ嫻嬪埌鍐茬獊鍚庡垯榪涜閫閬褲備笉榪囬渶瑕佹彁鐨勬槸鏈夋椂鍊橠CF浼氶噰鐢≧TS/CTS鏈哄埗鏉ュ噺灝戝啿紿併傝繖涓満鍒惰嚜鐢辨ф瘮杈冨己銆?/span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">PCF (</span><span id="hvzpftn" class="Apple-style-span" style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">Point Coordination Function)</span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">榪欎釜鏈哄埗渚濊禆浜嶢CCESS POINTS錛屾棦闇瑕侀氳繃涓鍙版寚瀹氱殑鏃犵嚎涓繪満鏉ュ崗璋冮氫俊銆傛墍浠ヨ繖涓満鍒跺彲浠ヤ負涓繪満鎻愪緵鏃犵珵浜夋湇鍔★紝鍥犱負AP鍙互鎸囧畾璋佸厛鍙戞暟鎹皝鍚庡彂鏁版嵁錛屾病鏈変紶杈撳啿紿侊紝鐪熷拰璋愶紝灝辨槸寮閿瑕侀珮涓浜涖?nbsp;</span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">HCF (</span><span id="hvzpftn" class="Apple-style-span" style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">Hybird Coordination Function)</span></p><p><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">榪欎釜鏈哄埗鏄互涓婁袱涓満鍒剁殑鎶樹腑錛屼竴鏂歸潰鎻愪緵涓涓敖鍔涜屼負鐨勬湇鍔★紝浣嗘槸鍙堝浜庨氫俊鐨勬楠よ姹傚張涓嶅PCF閭?span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">涔堜弗鏍箋傝繖涓ā寮忛氳繃緇存姢澶氫釜鏈嶅姟闃熷垪錛岀劧鍚庡啀鍐沖畾涓烘庢牱鐨勪富鏈烘彁渚涙庢牱鐨勬湇鍔°?/span></span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 19px; line-height: 27px;"><br /></span></p><p> </p><p><span style="font-size:18px">鎴戜滑浠ュ悗鐨勮璁烘儏鏅槸鍩轟簬DCF涓嬬殑銆傜壒鍒湪DCF榪囩▼涓紝浠栫殑閫閬跨畻娉曞拰浠ュお緗戠殑綆楁硶寰堢浉浼箋備篃鏄殢鍗抽閬匡紝闅忕潃鍙戦佸け璐ョ殑嬈℃暟澧炲姞錛岄閬挎椂闂寸殑閫夋嫨鑼冨洿浼氳繘琛屾寚鏁板闀褲傚綋媯嫻嬪埌淇¢亾絀洪棽鍚庯紝瑕佸彂閫佹暟鎹殑涓繪満闇瑕佺瓑寰匘IFS鏃墮棿闂撮殧鍚庣劧鍚庤繘鍏ョ珵浜夌姸鎬佷笅錛屾墍璋撶殑绔炰簤鐘舵佸氨鏄鎵鏈変富鏈轟細鍦ㄨ嚜宸辯殑绔炰簤紿楀彛涓殢鍗抽夋嫨涓涓瓑寰呮椂闂達紝榪欎釜絳夊緟鏃墮棿榪囧悗鍒欏紑濮嬪彂閫佹暟鎹?/span></p><p><span style="font-size:18px">棣栧厛鏉ヨ鍑犱釜瀹氫箟錛?/span></p><p><span style="font-size:18px">1.鏃墮殭(鍘熸枃鏄痵lot錛屾垜浠殏涓旂О涔嬩負鏃墮殭鍚?錛氳繖涓槸閫閬挎椂闂寸殑鏈灝忓崟浣嶏紝鍦ㄤ互澶綉涓閬挎椂闂村崟浣嶆槸姣榪樻槸寰鏉ョ潃鎴戝繕浜嗭紝榪欎釜鏃墮殭灝辨槸鏃犵嚎緗戠粶涓殑鏃墮棿鍗曚綅錛岃繖涓椂闅欐槸鏍規嵁鎯呭喌鑰屽畾鐨勩傚湪楂橀熺綉緇?緗戝崱澶勭悊鎬ц兘瓚婂ソ)涓椂闅欎細瓚婄煭銆傛椂闅欏彲鑳芥槸2寰錛屼篃鍙兘鏄?姣錛屽弽姝f槸鍦ㄤ笉鍚岀綉緇滀腑鏃墮殭鍙兘涓嶅悓錛岃繖涓彲浠ョ湅鎴愰閬挎椂闂寸殑鏈灝忓崟浣嶃?/span></p><p><span style="font-size:18px">2.绔炰簤紿楀彛錛屽氨鏄湪鍙戦佸け璐ュ悗閫夋嫨閫閬挎椂闂寸殑闆嗗悎銆傛瘮濡傝鍒濆鐨勭獥鍙eぇ灝忔槸0-31 slots銆傝繖灝辮〃鏄庡湪涓繪満闇瑕佸湪0-31 slots閲岄潰闅忓嵆鎶藉彇鍑轟竴涓兼潵榪涜絳夊緟銆傛墦涓瘮鏂規垜浠殑slot璁句負2寰錛岄偅涔堝湪涓婁竴嬈′紶杈撴暟鎹畬姣曞悗緇忚繃DIFS錛堜笅闈細浠嬬粛鍒幫級闂撮殭錛屾垜浠湪鑷繁鐨勭珵浜夌獥鍙?鑼冨洿錛?-31 slots)闅忓嵆閫夊彇鍒頒簡24榪欎釜鍊鹼紝閭d箞鎴戜滑闇瑕佺瓑寰呯殑鏃墮棿灝辨槸24 slots == 24*2 寰 == 48 寰銆傚綋鐒剁珵浜夌獥鍙g殑澶у皬浼氶殢鐫鍙戦佸け璐ョ殑嬈℃暟鑰屽鍔狅紝鍥犱負鍙戦佸け璐ユ鏁拌秺澶氳〃紺虹綉緇滆礋杞借秺澶э紝閭d箞鎵鏈夋棤綰跨綉涓繪満鍦ㄦ嫻嬪埌鑷繁鍙戦佸け璐ヤ簡浠ュ悗閮借灝嗚嚜宸辯殑绔炰簤紿楀彛涔樹互2錛岀劧鍚庡啀緇х畫絳夊緟鍙戦併備笉榪囧綋澶辮觸嬈℃暟杈懼埌闃鍊肩殑鏃跺欑珵浜夌獥鍙eぇ灝忓氨涓嶄細澧炲姞浜嗐傚綋鍙戦佹垚鍔熶互鍚庣珵浜夌獥鍙e氨浼氭仮澶嶅垵濮嬪箋?/span></p><p><span style="font-size:18px">鏈夊浘鏈夌湡鐩革紝璐翠釜鍥劇戶緇垎鏋愶細</span></p><p><span style="font-size: 18px; "><img src="http://www.shnenglu.com/images/cppblog_com/ay19880703/20324/ecd5b23c66756cbc3c6d9702.jpg" border="0" alt="" width="869" height="568" />鐪嬪埌鍒濆紿楀彛鑼冨洿鏄?-31錛岄殢鐫閲嶄紶嬈℃暟澧炲姞錛岀獥鍙d篃鏄憟鎸囨暟澧為暱銆傚綋澧為暱鍒伴榾鍊?024澶у皬鏃跺氨鍋滄澧為暱浜嗭紝鎺ヤ笅鏉ュ鏋滆繕鏄噸浼犲け璐ョ殑璇濆氨涓鐩撮殢鏈哄湪0-1023 slots涓寫鍑轟竴涓兼潵榪涜絳夊緟銆?/span></p><div><span style="font-size: 18px; "><br /></span></div><p> </p><p><strong><span style="font-size: 18px; font-family: Arial, 瀹嬩綋; ">3 鏃跺簭</span></strong></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">鍐嶈呭氨鏄椂搴忛棶棰樹簡錛岀畝鍗曟潵璇村氨鏄浣曡瀹氭棤綰夸富鏈轟粈涔堟椂鍊欒</span><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">鍋氫粈涔堛?/span><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">閭i鍏堝厛寰楄涓涓嬫棤綰跨綉緇滅洃鍚満鍒訛紝榪欎釜鍜屾湁綰跨綉緇滈噷闈笉澶竴鏍楓?/span><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">鏈夌嚎緗戠粶閲岄潰鑻ョ墿鐞嗕俊閬撴湁鏁版嵁浼犺緭鐨勮瘽鏄偗瀹氬彲浠ョ洃鍚殑鍒扮殑錛?/span><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">浣嗘棤綰跨綉緇滈噷闈㈠嵈涓嶄竴瀹氥傚氨鎷夸箣鍓嶉偅涓殣钘忚妭鐐圭殑渚嬪瓙鏉ヨ錛?/span><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">3鍙鋒満鍙兘鏃犳硶閫氳繃鐩戝惉鐗╃悊淇¢亾鏉ュ緱鐭ヤ竴浜屽彿鏈烘鍦ㄤ紶杈撱?/span><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">鎵浠ユ棤綰跨綉緇滈氫俊涓紝瑕佺‘瀹氫俊閬撴槸鍚﹁鍗犵敤錛屽紩鍏ヤ簡铏氭嫙杞芥嘗鐩戝惉銆?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; "><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; color: #ff0000; font-size: 18px; ">娉細杞芥嘗鐩戝惉鍜岃櫄鎷熻澆娉㈢洃鍚槸鍚屾椂鍦ㄨ繍琛岀殑錛屽彧鏈夊綋榪欎袱涓ā鍧楁樉紺虹┖闂叉椂鎵嶈〃紺轟俊閬撶┖闂詫紝鑻ュ叾涓殑涓涓ā鍧楁樉紺轟俊閬撶箒蹇欓兘琛ㄧず淇¢亾姝e湪琚崰鐢ㄣ?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; color: #ff0000; font-size: 18px; "><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;"><span style="font-size: 18px; ">鍏充簬铏氭嫙杞芥嘗鐩戝惉</span><span style="font-size: 18px; ">鐨勫師鐞嗭紝閭d箞寰楀厛浠嬬粛</span></span><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">涓涓彨Network Allocation Vector錛圢AV錛夎繖涓彉閲忋傝繖涓彉閲忎細闄勫湪鏃犵嚎鏁版嵁鍖呭唴鐨勩?/span><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">鍑嗗鍙戦佹暟鎹殑涓繪満閫氳繃NAV榪欎釜鍊奸氱煡鍏跺畠娌夐粯鐨勪富鏈轟俊閬撹琚崰鐢ㄥ闀挎椂闂存潵鐢ㄤ簬浼犺緭鏁版嵁銆?/span><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">姣忎釜涓繪満閮戒細緇存姢涓涓嚜宸辯殑NAV鍊鹼紝鐒惰岃繖涓狽AV鍊兼瘡闅?寰浼氶掑噺1錛岀洿鍒伴掑噺涓?鐨勬椂鍊欏氨琛ㄧず铏氭嫙杞芥嘗鐩戝惉鐨勪俊閬撶┖闂層?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 15.8333px; "><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 15.8333px; ">璇寸櫧浜哊AV灝辨槸涓畾鏃跺櫒錛屼絾鏄槸涓姩鎬佸畾鏃跺櫒錛屽綋涓繪満娌夐粯鏃朵細涓嶆柇鐨勬敹鍒版潵鑷棤綰跨綉緇滀腑鐨勫惈鏈塏AV鍊肩殑鏁版嵁鍖咃紝鍙湁褰撴暟鎹寘涓殑NAV鍊煎ぇ浜庤嚜宸辯殑NAV鍊兼椂錛屼富鏈烘墠浼氭洿鏂拌嚜宸辯殑NAV鍊箋?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">姣斿璇?1鍙蜂富鏈虹殑NAV鍊兼槸100錛岄偅涔堟敹鍒頒竴涓狝鍖咃紝瀹冪殑NAV鍊兼槸99錛岄偅涔?鍙蜂富鏈虹殑NAV鍊煎氨榪樻槸100涓嶅彉銆傝繃浜?0寰錛?鍙蜂富鏈哄張鏀跺埌涓涓狟鍖咃紝瀹冪殑NAV鍊艱繕鏄?9錛屼絾鏄繖涓椂鍊?鍙蜂富鏈虹殑NAV鍊兼槸90浜?姣忛殧1寰浼氶掑噺1鐨勫槢)錛屾墍浠?鍙蜂富鏈轟細鎶婅嚜宸辯殑NAV鍊兼洿鏂頒負99銆傜洿鍒拌繖涓狽AV鍊奸掑噺鍒?鎵嶈鏄庝俊閬撳彲鐢ㄣ?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 19px; line-height: 27px;"><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">鎺ヤ笅鏉ュ張鍥炲埌鏃跺簭闂涓婏紝鍦ㄦ瘡甯у彂閫佺粨鏉熷悗錛堣繖閲屾寚鐨勬槸鎵鏈変富鏈猴紝鐗瑰埆鏄矇榛樼殑涓繪満錛屽綋娌夐粯涓繪満媯嫻嬪埌NAV鍊兼槸0灝辮〃紺轟紶閫佸畬姣曚簡錛夐兘浼氭湁涓瓑寰呴棿闅欍備絾榪欑瓑寰呴棿闅欑被鍨嬪垎4縐嶏細</span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">SIFS (short interframe space)</span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">璇ョ被鍨嬫椂闂撮棿闅旀渶鐭紝榪欎釜綾誨瀷鐨勬椂闂撮棿闅斾富瑕佺敤浜庨珮浼樺厛綰у埆鐨勬搷浣溿傝鍙戦丷TS,CTS,ACK鎴栬呮槸琚垎鐗囩殑甯?鍋囪涓涓撫琚垎鎴愪簡3鍧楋紝絎竴閮ㄥ垎浼犻佸畬姣曪紝絳夊緟SIFS闂撮殧緇х畫鍙戦佺浜屽潡錛岃屽叾浠栬鍙戦佸畬鏁村撫鐨勪富鏈哄垯闇瑕佺瓑寰匘IFS闂撮殧錛岃繖鏍峰氨鑳藉紜繚榪欒鍒嗙墖鐨勫撫鑳藉涓嬈℃у彂閫佸畬姣曪紝涔熷氨鏄鍒嗙墖鐨勫撫浜彈鏇撮珮鐨勪紶杈撲紭鍏堢駭)鐨勬椂鍊欍?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 19px; line-height: 27px;"><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">PIFS (PCF interframe space)</span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">PIFS鏃墮棿闂撮殧鍏舵錛屽湪浼犺緭PCF鐩稿叧鐨勭鐞嗗撫鐨勬椂鍊欓噰鐢ㄨ繖綾誨瀷鐨勬椂闂撮棿闅斻傝繖縐嶆儏鍐靛氨鏄竴鑸垜浠敤璺敱鍣紝璺敱鍣ㄧ殑綆$悊甯у彧瑕佺瓑寰匬IFS灝卞彲浠ュ彂閫佷簡銆?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 19px; line-height: 27px;"><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">DIFS (DCF interframe space)</span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">DIFS鏃墮棿闂撮殧鏈闀匡紝鎵鏈変富鏈鴻浼犺緭鏁版嵁鐨勮瘽蹇呴』鍦ㄤ笂涓嬈′紶杈撳畬姣曞悗緇熶竴絳夊緟DIFS鏃墮殭鍚庢墠鑳藉皾璇曞彂閫併傚綋鐒訛紝榪欓噷璇寸殑鏄皾璇曞彂閫侊紝鍥犱負鍚庨潰榪樺緱榪涘叆涓涓珵浜夐棿闅斻?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;"><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">EIFS (extended interframe space)</span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">榪欑被甯х殑鏃墮棿闂撮殧涓嶇‘瀹氾紝鍦ㄤ紶杈撻敊璇殑鏃跺欐墠浼氱敤鍒般?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;"><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">鎵浠ラ櫎鍘籈IFS錛屼粬浠花鐨勬椂闂村叧緋誨氨鏄? SIFS<PIFS<DIFS錛孲IFS絳夊緟鏃墮棿鏈鐭紝DIFS鏈闀匡紝PIFS灞呬腑</span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">銆傚彲浠ュ彂鐜幫紝鏃墮棿瓚婄煭錛屽彂閫佹垚鍔熺巼瓚婇珮錛岃繖涔熷氨璇存槑浼樺厛綰ц秺楂樸傛樉鑰屾槗瑙侊紝RTS/CTS甯э紝涔熷彨鎺у埗甯х殑鍙戦侀棿闅旈兘鏄疭IFS錛屽洜涓鴻繖綾誨撫鐨勪紭鍏堢駭瑕侀珮浜庡鉤甯哥殑鏁版嵁浼犺緭銆傛墍浠ュ綋浣犺鍙戦丷TS涔嬬被鐨勫撫鏃跺氨閲囩敤SIFS鏃墮棿闂撮殧錛岃繖鏍峰氨鑳藉淇濊瘉RTS甯ц兘澶熸洿蹇瘮浣跨敤鍏跺畠鏃墮棿闂撮殧鐨勫撫鍙戦佸嚭鍘伙紝鍏跺畠甯ф帴鏀跺埌RTS鎶ユ枃鍚庡氨寮濮嬩繚鎸佹矇榛樺皢涓嶈瘯鍥懼彂閫佸撫浜嗐?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;">鏁翠釜榪囩▼涓茶搗鏉ュ氨濡備笅鍥炬墍紺猴細</span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;"><img src="http://www.shnenglu.com/images/cppblog_com/ay19880703/20324/5cb64a00668359541c95836b.jpg" border="0" alt="" width="886" height="306" /><br />鍏堝垎鏋愪笂闈㈢殑閭d釜鏃墮棿杞達紝RTS鍙戦佸嚭鍘伙紝鏀跺埌CTS銆傜劧鍚庨棿闅擲IFS灝卞紑濮嬪彂閫佹暟鎹簡錛岃繖閲岀殑甯ф槸鍒嗙墖鐨勶紝鍒嗙墖鐨勫撫闇瑕佷竴嬈℃т紶杈撳畬錛屾墍浠ユ瘡涓撫鐨勭瓑寰呭彂閫佹椂闂存槸SIFS銆傞噷闈㈣繕鍙互鐪嬪埌ACK鐨勫洖澶嶆椂闂翠篃鏄渶瑕佺瓑寰匰IFS鐨勶紝鍥犱負榪欏嚑涓被鍨嬬殑甯у淇濊瘉鏁版嵁浼犺緭闈炲父閲嶈錛屾墍浠ヤ韓鏈夋洿楂樼殑鍙戦佷紭鍏堢駭錛屽湪榪欑鎯呭喌涓嬶紝鍏跺畠鐨勬棤綰夸富鏈哄彂閫佹暟鎹共鎵拌繖嬈′紶杈撴槸涓嶅彲鑳界殑錛屽洜涓轟粬浠渶瑕佺瓑寰匘IFS鏃墮棿闂撮殧銆傚湪浠栦滑絳夊緟娌″畬鐨勬椂鍊橰TS,CTS,ACK錛屽垎鐗囧撫鐨勪紶杈撴棭閮藉紑濮嬩紶杈撲簡錛岃繖浜涗富鏈烘帴鏀跺埌鏁版嵁浼犺緭淇℃伅鍚庡彧鑳借繘鍏ユ矇榛樸?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;"><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;">閭d箞涓嬮潰鐨勯偅涓椂闂磋醬灝辨洿娓呮櫚浜嗭紝榪欎釜鏃墮棿杞村叾瀹炲彲浠ョ湅鎴愭槸鍏跺畠娌夐粯鏃犵嚎涓繪満NAV鍊肩殑鎯呭喌銆?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;">鍦ㄥ垰鍙戦佺涓涓猂TS甯х殑鏃跺欙紝鍏跺畠涓繪満鏀跺埌浜哛TS甯т腑闄勫甫鐨凬AV鍊鹼紝絳夊埌0鍙峰撫浼犻佺粨鏉熷悗鍚勪釜涓繪満寮濮嬬瓑寰匘ISF鏃墮棿鍑嗗浼犺緭錛屼絾鏄繖涓椂鍊欏彂閫佷富鏈虹敱浜庡湪鍙戦佸垎鐗囧撫錛屾墍浠ュ彧瑕佺瓑寰匰IFS鏃墮棿灝卞彂閫佷簡錛岀粨鏋滄槸鍏跺畠涓繪満鐨凞ISF鏃墮棿榪樻病絳夊緟瀹屽氨鏀跺埌浜?鍙峰撫緇欎粬浠殑NAV鍊鹼紝鐒跺悗鍐嶄竴鍙峰撫浼犻佺殑榪欐鏃墮棿浠栦滑鍙堝緱鍙兘娌夐粯銆傝繖涓椂闂磋醬涓婇潰閮ㄥ垎琛ㄧずSENDER閫氬憡緇欏叾瀹冧富鏈虹殑NAV鍊肩殑鏈夋晥鏈燂紝涓嬮潰琛ㄧずReveiver閫氬憡緇欏叾瀹冧富鏈虹殑NAV鍊兼湁鏁堟湡銆?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;"><br /></span></p><p><strong><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;">4 鏃犵嚎涓繪満鍙戦佽繃紼?/span></strong></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">緇煎悎涓婇潰鐨勬墍鏈夋蹇碉紝涓嬮潰璐翠釜鍥炬潵鍏ㄧ洏鍒嗘瀽涓嬪崟涓棤綰夸富鏈哄彂閫佹暟鎹寘鐨勮繃紼?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;"><img src="http://www.shnenglu.com/images/cppblog_com/ay19880703/20324/0d7fd62ba8be256a5243c102.jpg" border="0" alt="" width="812" height="185" /><br /><span style="font-size:18px"><br /></span></span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;"><span style="font-size:18px">1. 鍓嶉潰鐨刡usy孌佃〃紺轟富鏈篈鐩戝惉鍒扮綉緇滄暟鎹箒蹇欙紙榪欓噷涓繪満A鍒ゆ柇淇″彿鏂歸潰鍙兘鏄疦AV鍊兼病閫掑噺鍒?錛屼篃鍙兘鏄墿鐞嗚澆娉㈢洃鍚偅鍧楁嫻嬪埌鏈夋暟鎹紶閫侊紝榪樺彲鑳芥槸2鑰呭吋鏈夛級</span><br /><span style="font-size:18px"><br /></span></span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">2. OK,busy孌電粨鏉熷悗榪涘叆絳夊緟闃舵錛屽綋鐒惰繖閲岃鍙戦佹暟鎹屼笖涓嶇敤RTS/CTS鏈哄埗鐨勮瘽錛岄偅涔堢瓑寰呮椂闂村簲璇ユ槸DIFS闂撮殧鐨?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; "><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">3. 榪涘叆绔炰簤鍙戦侀樁孌碉紝鎵鏈変富鏈哄湪鑷繁紿楀彛涓殢鏈洪変竴涓椂闂存潵絳夊緟</span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; "><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">4. 鍋囪涓繪満A闅忔満鍒扮殑絳夊緟鏃墮棿鏈鐭紝閭d箞浠栧氨寮濮嬪彂閫佹暟鎹簡錛屽叾瀹冧富鏈哄彂鐜版湁鏁版嵁浼犺緭浜嗗垯浼氳繘鍏ユ矇榛樼姸鎬侊紝絳夊緟涓嬩竴嬈℃暟鎹紶杈撳畬姣曞悗榪涜绔炰簤銆?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; "><br /></span></p><p><strong><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 20px; ">5 閲嶄紶</span></strong></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">鍒氭墠璇村埌浜嗗垎鐗囷紝閭d箞榪炲甫閲嶄紶涓璧瘋浜嗗惂</span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;"><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;">鍏堣璇翠負浠涔堣鍒嗙墖錛屼粈涔堟椂鍊欏垎鐗囩殑闂</span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">鍦ㄦ棤綰跨綉緇滈氫俊涓紝瑕佺煡閬撲紶杈撴椂鍙楀埌鐨勫共鎵版槸澶氱澶氭牱鐨勶紝涔熷氨鏄鏃犵嚎緗戠粶鍦∕AC灞傜殑紼沖畾鎬ф槸榪滆繙涓嶅浠ュお緗戣埇紼沖畾鐨勩傛墍浠ュ湪闀挎暟鎹撫浼犺緭鐨勬椂鍊欏緢瀹規槗涓棿琚腑鏂備負浜嗘彁楂樼ǔ瀹氭э紝灝辨妸榪欎釜甯у垎鐗囷紝鐒跺悗鍐嶄紶杈擄紝鏄劇劧鐭撫浼犺緭鎴愬姛鐜囪楂樹簬闀垮撫銆傝繖鏍瘋璁$殑鐩殑鏄負浜嗘彁楂樻棤綰縈AC灞傜殑鍙潬鎬с傝繖涓氨璺熶綘鎷縄E涓嬩竴涓?G鐨勪笢瑗匡紙涓嬈℃т紶闀垮撫錛夊拰鎷胯繀闆蜂笅鍚屾牱涓涓?G鐨勪笢瑗塊亾鐞嗘槸涓鏍風殑錛屾樉鐒舵嬁榪呴浄涓嬫洿紼沖畾浜涳紝鍥犱負鏈夋柇鐐圭畫浼犮傞偅涔堝垎鐗囦紶杈撳厖鍏墮噺灝辨槸鎶婁互鍓嶇殑鏅欼E涓嬭澆鍗囩駭浼樺寲鎴愪簡鏂偣緇紶緗簡銆?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;"><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;">褰撴暟鎹寘鍒版寚瀹氱殑鍒嗙墖闃鍊肩殑鏃跺欏氨瀵規暟鎹寘榪涜鍒嗙墖錛屽悓涓涓撫琚垎鐗囩殑閮ㄥ垎涔熶細甯︽湁涓鏍風殑甯у簭鍙鳳紝涔熶細鏈夎嚜宸辯殑鍒嗙墖緙栧彿錛屼篃浼氭湁涓〃紺轟負琛ㄧず榪欎釜甯ф槸涓嶆槸鍒嗙墖甯с傝繖涓窡IP鍒嗙墖璁捐鍘熷垯鏄竴鏍風殑錛岃繖涓氨涓嶅叿浣撹浜嗐?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;"><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;">鍐嶈呭氨鏄噸浼犻棶棰樹簡錛岀椹椂鍊欓噸浼狅紵</span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;">浠ヤ笂綃囧箙鎻愬埌榪囷紝鍙湁鍦ㄦ敹鍒癆CK紜鍚庝富鏈烘墠浼氳涓鴻嚜宸卞彂閫佸撫鏄垚鍔熺殑銆傚悓鏍鳳紝RTS鍙湁鍦ㄦ敹鍒癈TS鍚庢墠璁や負鑷繁鐨凴TS鍙戦佹垚鍔熶簡銆?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;">鎵浠ヨ繖閲屾秹鍙婂埌涓涓棶棰樺氨鏄彂閫佸け璐ュ浣曞鐞嗭紵閲嶄紶錛熷~鏄噸浼狅紝浣嗘槸涓鐩村彂閫佸け璐ュ憿錛熸墍浠ュ浜庢瘡涓撫閮芥湁涓噸浼犺鏁板櫒錛堟敞錛氱珵浜夌獥鍙eぇ灝忓氨鏄牴鎹繖涓噸浼犺鏁板櫒鏉ュ喅瀹氱殑錛夛紝澶辮觸涓嬈″氨閫掑涓錛屼絾澶辮觸鍒版寚瀹氱殑涓婇檺鐨勬椂鍊欏氨鏀懼純鍙戦佽甯х劧鍚庡悜涓婂眰鍗忚鎶ュ憡銆?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="font-size: 20px; line-height: 27px;">鐒惰岄噸浼犺鏁板櫒鏈?涓紝鍒嗗埆鏄暱甯ч噸浼犺鏁板櫒鍜岀煭甯ч噸浼犺鏁板櫒銆傛煇甯у綋闀垮害澶т簬鎸囧畾闃鍊肩殑鏃跺欙紝璇ュ撫鍙戦佸け璐ュ垯闀垮撫閲嶄紶璁℃暟鍣ㄩ掑1錛屽弽涔嬩害鐒躲傝繖涓榾鍊兼槸鍙互璁懼畾鐨勶紝閲嶄紶涓婇檺涔熷彲浠ヨ瀹氥傝繖涔堣璁℃槸鍥犱負闀垮撫浼氬崰鐢ㄦ洿澶氳祫婧愶紙鍐呭瓨絀洪棿錛屼紶杈撴椂闂寸瓑錛変互渚胯綆$悊鍛橀氳繃璋冩暣闃鍊煎拰鍚勪釜璁℃暟鍣ㄧ殑閲嶄紶涓婇檺鏉ヤ紭鍖栨棤綰跨綉緇溿傞偅涔堟垜浠潵YY涓涓嬶紙綰睘YY……鎴戞瘮杈冩病鍋氳繃緗戠粶浼樺寲榪欐柟闈㈢殑緇忛獙錛屽彧鏄亣璁句笅鍙兘鐨勫満鏅瘇錛夛紝姣斿璇存垜甯屾湜鐢ㄦ潵浼犺緭300瀛楄妭涓涓嬬殑甯х殑鏃墮棿澶氫竴浜涳紝閭d箞鎴戝氨璁懼畾闃鍊間負300錛岀劧鍚庨暱甯ч噸浼犺鏁板櫒鐨勪笂闄愯緗綆涓浜涳紝鐭撫閲嶄紶璁℃暟鍣ㄤ笂闄愯緗珮涓浜涖?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; "><br /></span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">閲嶄紶璁℃暟鍣ㄨ娓呴浂寰堢畝鍗曪紝鏈夊嚑縐嶆儏鍐?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">1 RTS甯у彂閫佸嚭鍘昏嫢鏀跺埌CTS甯у垯娓呴浂閲嶄紶鎶鏈櫒錛堝綋鐒惰繖涓彧鍙兘鍙戠敓鍦ㄧ煭甯ц鏁板櫒鎯呭喌涓嬶紝鍥犱負RTS鏁版嵁甯т竴鑸儏鍐典笅涓嶅睘浜庨暱甯?#8230;…褰撶劧浣犺鎶婇榾鍊艱鎴怰TS甯уぇ灝忔垜涔熸病璇濊~錛?/span></p><p><span id="hvzpftn" class="Apple-style-span" style="line-height: 27px; font-size: 18px; ">2 甯ф暟鎹彂閫佸嚭鍘伙紝鏀跺埌ACK紜</span></p><p><span 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