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xia yi dai wu xian wang luo ji shu ――HiperLAN/2

2008-05-31 18:32:28 编辑來源:互联网 评论
 
 
 
本文为【下一代无线网络技术――HiperLAN/2】的拼音翻译版
  ---- bian zhe an : chuan tong de wu xian LAN ji shu shi yong de shi 802-11 biao zhun de 2-4GHz pin duan , er biao zhun hua de HiperLAN/2 ji shu de chu xian , shi de wu xian LAN zai 5GHz pin duan shang de yun xing cheng wei ke neng 。 ben qi kan deng de liang pian wen zhang jian yao jie shao le HiperLAN/2 ji shu de yuan li ji te dian 。
  ---- you yu bu shou wu li xian lu de xian zhi , wu xian wang luo ju you le you xian wang luo suo bu ke bi ni de you shi 。 zhen dui wu xian LAN ying yong de xu qiu , ge chang shang dou tui chu le yi xi lie ji yu 802.11 biao zhun de wu xian LAN(WLAN) chan pin , zhe xie chan pin ti gong de dai kuan cong 1Mbps dao 11Mbps bu deng 。 dan shi , xian zai zhe xie wu xian wang luo chan pin zai xing neng shang huan yuan yuan bu neng yu chuan tong de gu ding wang luo chan pin xiang bi , zhe jiu shi de ru jin de wu xian wang luo zai xing neng fang mian yu cai yong GSM、AMPS deng ji shu de guang yu feng wo wang luo si hu bing mei you shi zhi xing de qu bie 。 jin guan ye zhi chi yi xie su lv jiao di (10kbps zuo you ) de shu ju tong xin , dan zhe xie wu xian wang luo de zui zhu yao de ying yong huan shi zhi chi hua yin fu wu 。 wei le man zu wei lai de Internet/Intranet fang wen de xu qiu , ye jie zheng zai kai fa xin yi dai de WLAN he feng wo wang luo ji shu , zhe xie xin yi dai de ji shu jiang zai QoS( yi bian chuang jian duo fu wu wang luo )、 an quan ji xing neng fang mian jin xing gai jin 。
  ---- ben wen jie shao le you HiperLAN/ quan qiu lun tan (H2GF) kai fa de bei cheng wei HiperLAN/2 de xia yi dai wu xian LAN ji shu (WLAN)。H2GF shi you BoschTelcom、Dell、EriCsson、Nokia、TeliaMobile he TexasInstruments deng gong si fa qi de , qi zong zhi jiu shi yao tui dong HiperLAN/2 ji shu de biao zhun hua 。HiperLAN/2 zui yin ren zhu mu zhi chu shi ta neng gou zai 5GHz de pin duan shang yun xing , er chuan tong de wu xian LAN ji shu da duo shi yong 802.11 biao zhun de 2.4GHz pin duan 。HiperLAN/2 biao zhun yi jing zai qu nian di bei zui zhong que ding xia lai 。
  wang luo jie gou ji gong neng
  ---- tu 1 xian shi le yi ge HiperLAN/2 wang luo de tuo pu jie gou 。 yi dong zhong duan (MT) tong guo yi ge you HiperLAN/2 biao zhun que ding de wu xian jie kou yu fang wen dian (AP) jin xing tong xin 。MT de yong hu ke yi zai HiperLAN/2 wang luo zhong zi you di yi dong ,HiperLAN/2 ke yi que bao yong hu he MT de dao zui jia de chuan shu xing neng 。 yi ge MT zai mou ge shi ke zhi yu yi ge AP jin xing tong xin , bu guan yong hu yi dong dao na li ,HiperLAN/2 wu xian wang luo neng gou jian ce dao mei ge shi ke neng gou wei gai MT ti gong zui jia xing neng de AP, bing zi dong jian li yu gai AP de lian xi 。 ju jie shao , zai liang ge MT zhi jian ye ke yi bu tong guo wu xian jie kou zhi jie jin xing tong xin , dan zhe zhong ji shu huan chu yu yan fa jie duan , ju ti xi jie xian zai huan wei gong kai 。
  ----HiperLAN/2 ding yi le jian ce gong neng he zhuan huan xin ling , yi zhi chi xu duo wu xian wang luo gong neng , bao kuo dong tai pin lv xuan ze (DFS) gong neng 、 lian lu zi shi ying 、 wu xian xin yuan zhuan huan 、 duo shu tian xian he gong lv kong zhi deng 。
  ----● dong tai pin lv xuan ze
  ---- gai gong neng da ying ji ge wang luo ti gong shang gong xiang ke yong de pin pu , bing qie ke yi yong lai bi mian pin lv zhi jian de xiang hu gan rao 。 mei ge AP shi tong guo you AP yi ji he ta xiang guan de MT zhi xing de guo lv gan rao ji liang lai jin xing pin lv xuan ze de 。
  ----● lian lu zi shi ying
  ---- wei le man zu ge zhong wu xian chuan shu fu wu zhi liang de xu yao , zai xin rao bi (C/I) fang mian ,HiperLAN/2 shi yong le yi ge lian lu zi shi ying fang an 。C/I de bian hua fan wei gen ju HiperLAN/2 xi tong bu shu de wei zhi er ding , er qie , gen ju si zhou wu xian xin yuan zhong de tong xin zhuang kuang ,C/I ke yi jin xing bian hua 。 lian lu zi shi ying fang an gen ju lian lu de zhi liang ji liang ta shi ying wu li ceng de cheng du 。 yin ci , wang luo ke yi dong tai di wei mei yi ge bei fa she de MAC zhen xuan ze SCH( duan chuan shu xin dao ) he LCH( chang chuan shu xin dao )。
  ----● tian xian
  ----HiperLAN/2 zhong zhi chi duo shu tian xian , zhe yang ke yi zeng jia wu xian wang luo de C/I bi , ti gao wu xian wang luo de xing neng 。HiperLAN/2 zhong de MAC xie yi he zhen jie gou da ying shi yong 7 shu tian xian 。
  ----● zhuan huan
  ---- zhuan huan fang an shi you MT qi dong de , ye jiu shi shuo , mei yi ge MT dou dui si zhou de AP jin xing bi yao de jian ce , bing xuan ze zui shi he de AP jin xing tong xin 。 zhuan huan jian ce fang fa bing mei you zai HiperLAN/2 biao zhun zhong jin xing ding yi , yin ci , you de chang shang gen ju xin hao de qiang du jin xing zhuan huan , ye you de chang shang gen ju qi ta de zhi liang biao zhun jin xing zhuan huan 。HiperLAN/2 biao zhun ding yi le bi yao de xin ling lai wan cheng zhe zhong zhuan huan 。
  ----● gong lv kong zhi
  ----HiperLAN/2 zai MT( shang xing lian lu ) he AP( xia xing lian lu ) zhong dou zhi chi fa she ji gong lv kong zhi 。MT gong lv kong zhi zhu yao yong yu jian hua AP jie shou ji de she ji 。AP gong lv kong zhi shi HiperLAN/2 biao zhun de yi bu fen 。
  gong zuo yuan li
  ---- tu 2 biao shi le ju you yi ge MT he san ge zhi chi ju you you xian quan zhi shi Q biao ji (Qtag) de AP de HiperLAN/2 fang an 。
  ---- zai HiperLAN/2 zhong , mei yi ge AP dou shi yong DFS suan fa xuan ze he shi de pin lv 。 shou xian ,MT jiang jian ce xin hao qiang du , bing xuan ze yao yu ta jian li lian xi de zui shi dang de AP。MT cong xuan zhong de AP zhong jie shou yi ge MAC hao (MACID), jin jie zhe jiao huan lian lu gong neng bing ju ci jue ding shi yong shen me yang de ren zheng guo cheng he jia mi suan fa , yi ji shi yong na yi ge ju he ceng yong yu yong hu de tong xin 。 zai mi yao jiao huan he ren zheng zhi hou ,MT yu AP jiu ke yi jian li lian xi 。 zui hou , zai shu ju lian lu kong zhi ceng (DLC) jian li yong hu lian jie , ci shi yong hu jiu ke yi jin xing tong xin le 。
  ----MT jiang tong guo liang ge jian li de lian jie ( zai HiperLAN zhong que sheng zhi shi 2 ge ) shou fa shu ju , zhe liang ge lian jie zhi chi liang zhong bu tong de dai you Q biao ji yang she de you xian quan pai dui ( dang ran , ye ke yi zhi chi geng duo de you xian ji pai dui )。 yi tai wang ju he ceng que bao mei ge yi tai wang zhen de you xian ji gen ju yu xian ding yi de yang she fang an bei yang she dao shi dang de shu ju lian lu ceng yong hu lian jie zhong 。
  ----MT ke yi jue ding jia ru yi ge huo duo ge duo lu guang bo xiao zu 。HiperLAN/2 wang luo ke yi bei pei zhi lai shi yong N ge dan lu guang bo , yi de dao zui li xiang de chuan shu zhi liang , ye ke yi wei mei ge jia ru de xiao zu fen pei yi ge dan du de MAC hao (MACID) yi bian wei qi bao liu dai kuan 。 jia ru yi ge dan du de MAC hao bei fen pei gei yi ge duo lu guang bo xiao zu , na me yang she fang an jiu shi :IP di zhi ——IEEE di zhi ——MAC hao 。
  ---- dang MT yi dong shi , jia ru ta jian ce dao you yi ge AP geng shi he yu jin xing tong xin ( ru ju you geng hao de xin hao qiang du ), na me ta hui zhi xing yi ci zhuan huan 。 suo you yi jing jian li de lian jie jiang shi yong APAP xin ling , tong guo gu ding LAN zi dong zhuan huan dao xin de AP shang 。 dang MT( geng que qie di jiang shi yong hu ) xiang yu LAN duan kai lian jie shi ,MT jiang qing qiu duan kai lian xi , zhe yang jiu duan kai le MT he AP zhi jian de suo you lian jie 。 dang MT yi dong dao chao chu HiperLAN/2 de fu gai fan wei shi , ye hui duan kai MT he AP zhi jian de suo you lian jie 。
  zhu yao te dian
  ----HiperLAN/2 ji shu de zhu yao te dian bao kuo yi xia ji ge fang mian :
  ----● gao chuan shu su lv
  ----HiperLAN/2 ju you hen gao de chuan shu su lv , ta de wu li ceng chuan shu su lv zui gao ke da dao 54Mbps, di san ceng de chuan shu su lv zui gao ke da dao 25Mbps。 wei le shi xian zhe yang gao de su lv ,HiperLAN/2 li yong yi zhong bei cheng wei zheng jiao pin lv shu zi fu yong (OrthogonalFrequencyDigitalMultiplexing,OFDM) de tiao zhi fang fa lai fa she mo ni xin hao 。OFDM zai shi jian fen san de huan jing ( ru ban gong shi zhong ) shi fei chang you xiao de , zhe xie di fang fa she de wu xian xin hao ke neng hui bei xu duo dian fan she , shi de ta men zai zui zhong dao da jie shou fang yi qian hui chan sheng bu tong de chuan bo shi jian 。 zai wu li ceng shang mian ,HiperLAN/2 shi yong le quan xin de mei ti kong zhi ceng (MAC) xie yi , ta shi yong yi zhong dong tai shi fen shuang gong ji shu lai zui you xiao di li yong wu xian zi yuan 。
  ----● mian xiang lian jie
  ---- chuan tong de wu xian wang luo dou shi fei lian jie de 。 zai HiperLAN/2 wang luo zhong , xu yao xian shi yong HiperLAN/2 kong zhi ban de xin ling gong neng , zai MT he AP zhi jian jian li lian jie , ran hou cai neng jin xing shu ju chuan shu 。 lian jie shi shi yong wu xian jie kou shi fen duo zhi fu yong ji shu jian li de 。HiperLAN/2 zhong shi yong de lian jie you liang lei , ji dian dui dian de lian jie he dan dian dui duo dian de lian jie 。 dian dui dian lian jie shi shuang xiang de , er dan dian dui duo dian de lian jie shi dan xiang de , ji zhi zhi xiang yi dong zhong duan MT。 chu ci zhi wai , huan you yi ge zhuan yong de guang bo xin dao yong yu cong yi ge AP jiang shu ju fa she dao suo you de zhong duan MT。
  ----●QoS zhi chi
  ----HiperLAN/2 de mian xiang lian jie de te xing shi ta hen qing yi man zu QoS yao qiu , ke yi wei mei ge lian jie fen pei yi ge zhi ding de QoS, que ding zhe ge lian jie zai dai kuan 、 yan chi 、 yong sai 、 bi te cuo wu lv deng fang mian de yao qiu 。 zai HiperLAN/2 zhong huan you ke neng shi yong yi ge geng jia jian dan de fang fa , ji mei ge lian jie ke yi fen pei yi ge bu tong de you xian ji biao ji 。 zhe zhong QoS zhi chi yu gao chuan shu su lv yi qi bao zheng le bu tong de shu ju xu lie ( ru shi pin 、 hua yin he shu ju deng ) ke yi tong shi jin xing gao su chuan shu 。
  ----● zi dong pin lv fen pei
  ---- zai HiperLAN/2 wang luo zhong , bu xu yao xiang zai feng wo wang luo ( ru GSM zhong ) na yang shou gong gui hua pin lv 。 wu xian ji zhan ( zai HiperLAN/2 zhong bei cheng wei fang wen dian AP) ben shen zhi chi wei mei ge AP zai fu gai fan wei nei jin xing de chuan shu xuan ze zui shi dang de wu xian xin dao 。( shang jie di D26 ban ) mei yi ge AP dou jian shi lin jin de AP yi ji HiperLAN/2 huan jing zhong de qi ta wu xian zi yuan , bing qie gen ju wu xian xin dao yi jing bei qi ta AP zhan yong he ba dui wu xian wang luo huan jing de gan rao jiang dao zui di zhe liang ge yuan ze , xuan ze zui shi dang de chuan shu xin dao 。
  ----● an quan zhi chi
  ----HiperLAN/2 zhi chi ren zheng he jia mi 。 tong guo shi yong ren zheng ji zhi ,AP he MT ke yi xiang hu jin xing ren zheng , yi que bao dui wang luo de shou quan fang wen ( cong AP de jiao du kan ), huo zhe que bao dui you xiao de wang luo ti gong shang de fang wen ( cong MT de jiao du kan )。HiperLAN/2 zhong de ren zheng ji zhi yao yi kao yi xie qi ta zhi chi gong neng ( ru mu lu fu wu deng ), dan zhe xie zhi chi gong neng ben shen bing bu bao kuo zai HiperLAN/2 ji shu li 。
  ---- yong hu zai yi jing jian li de lian jie shang jin xing tong xin shi , ke yi shi yong jia mi ji shu lai fang zhi shi shi qie ting he zhong jian ren de gong ji 。
  ----● yi dong xing zhi chi
  ----MT jiang neng gou zi dong cong zui jin de AP fa she he jie shou shu ju 。 geng que qie di jiang ,MT shi yong de AP suo ti gong de wu xian xin hao ju you zui jia de xin zao bi 。 yin ci , dang yong hu he MT yi dong shi ,MT you ke neng jian ce dao you ling wai yi ge bi dang qian zheng zai shi yong de AP ju you geng hao de wu xian chuan shu xing neng de AP。 ci shi ,MT jiang zi dong zhuan huan dao zhe ge AP shang 。 suo you yuan lai yi jing jian li de lian jie dou jiang bei zhuan yi dao zhe ge xin de AP shang , shi de MT reng ran chu yu HiperLAN/2 wang luo shang , yin ci bu hui dao zhi tong xin de zhong duan 。 bu guo , zai zhuan huan qi jian ke neng hui fa sheng yi xie diu bao xian xiang 。
  ---- jia ru yi ge MT zai mou duan shi jian li chao chu le wu xian HiperLAN/2 de fu gai fan wei ,MT ke neng duan kai yu HiperLAN/2 wang luo de lian xi , zhe hui shi de suo you yuan you de lian jie dou bei shi fang chu lai 。
  ----● wang luo he ying yong du li
  ----HiperLAN/2 xie yi zhan ju you yi ge ling huo de jie gou , yin ci hen qing yi yu duo zhong gu ding wang luo jin xing shi pei he ji cheng 。 ru yi ge HiperLAN/2 wang luo ke yi bei yong yu yi ge jiao huan shi yi tai wang de zui hou yi duan , dan ta ye ke neng bei yong yu qi ta de pei zhi , ru zuo wei dui di san dai feng wo wang luo de yi ge fang wen wang luo 。 suo you jin tian ke yi zai gu ding wang luo zhong yun xing de ying yong dou ke yi zai HiperLAN/2 wang luo zhong yun xing 。
  ----● gong hao di
  ---- zai HiperLAN/2 zhong ,MT jie sheng gong hao de ji zhi shi ji yu MT qi dong de xiu mian qi zhuang tai 。MT ke yi zai ren yi shi ke qing qiu AP jin ru yi zhong di gong lv xiu mian zhuang tai , er qie ke yi que ding zhe yi zhuang tai de shi jian 。 dang xie shang hao de xiu mian qi man shi ,MT sou suo shi fou you AP fa chu de huan xing zhi shi 。 jia ru mei you sou suo dao huan xing zhi shi ,MT jiang chong xin zhuan huan dao di gong lv zhuang tai jin ru xia yi ge xiu mian qi 。 zai xiu mian qi jian ,AP jiang yan chi suo you deng dai de shu ju chuan shu ren wu , zhi dao MT zhong jie shu xiang ying de xiu mian qi wei zhi 。HiperLAN/2 zhi chi bu tong de xiu mian shi jian , zhe yang ke yi man zu yong hu dui duan yan chi huo di gong lv deng bu tong de xu qiu 。
  ying yong ling yu
  ----HiperLAN/2 de ying yong ling yu fei chang guang fan , xia mian shi yi xie zui dian xing de ying yong ling yu 。
  ----● qi ye LAN
  ---- tu 3 biao shi le shi yong yi tai wang LAN he IP lu you qi jian li de qi ye wang luo , zai zhe ge wang luo zhong , yi ge HiperLAN/2 wang luo bei yong zuo MT he LAN zhi jian de zui hou yi duan 。HiperLAN/2 wang luo zhi chi tong yi ge LAN/ zi wang (Subnet) zhong de yi dong xing 。 zai zi wang zhi jian yi dong jiu yi wei zhe IP ju you ke yi dong xing 。
  ----● chong yao di dian
  ----HiperLAN/2 ke yi bu shu zai yi xie chong yao di dian ( ru ji chang 、 bin guan deng ), yi bian wei zheng zai lv xing de yong hu ti gong yuan cheng fang wen he Internet fu wu 。 yu HiperLAN/2 lian jie de fang wen fu wu qi da ying dian dui dian lian jie , ye ke yi fang wen te ding de qi ye wang luo ( ke neng xu yao tong guo te ding de ISP)。
  ----● fang wen di san dai feng wo wang luo
  ---- yong hu ke yi tong guo HiperLAN/2 fang wen di san dai feng wo wang luo ( ru WCDMA deng )。 jiang lai ,HiperLAN/2 he WCDMA ji shu fu gai de di qu bi jiang yue lai yue guang fan , er yong hu ke yi cong zhong de dao zui da de hao chu , ta men bu jin ke yi shi yong HiperLAN/2 ti gong de fu wu , er qie zai mei you HiperLAN/2 de di fang reng ran ke yi shi yong WCDMA feng wo wang luo fu wu 。 dang yong hu zai liang lei wang luo zhi jian yi dong shi , gai xin wang luo ke yi bao zheng yong hu wu feng di zi dong zai liang lei wang luo zhi jian jin xing zhuan huan 。
  ----● jia ting wang luo
  ----HiperLAN ke yi wei jia ting huan jing chuang jian yi ge wu xian ji chu she shi , yong yu jia yong she bei ( ru jia yong PC、VCR、 zhao xiang ji he da yin ji deng ) de lian wang 。HiperLAN/2 de gao shu chu he QoS te xing ke yi man zu ge zhong jia yong she bei shi pin chuan shu yu shu ju tong xin de yao qiu 。 zai zhe zhong qing kuang xia ,AP ke neng hui ti gong yi ge dao gong zhong Internet de “ shang xing ” lian lu 。【原文】【汉音对照
 
 
 
 
 
 
 
 
 
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  ---- bian zhe an : chuan tong de wu xian LAN ji shu shi yong de shi 802-11 biao zhun de 2-4GHz pin duan , er biao zhun hua de HiperLAN/2 ji shu de chu xian , shi de wu xian LAN zai 5GHz pin duan shang de yun xing cheng wei ke neng 。 ben qi kan deng de liang pian wen zhang jian yao jie shao le HiperLAN/2 ji shu de yuan li ji te dian 。 ---- you yu bu shou wu li xian lu de xian zhi , wu xian wang luo ju you le you xian wang luo suo bu ke bi ni de you shi 。 zhen dui wu xian LAN ying yong de xu qiu , ge chang shang dou tui chu le yi xi lie ji yu 802.11 biao zhun de wu xian LAN(WLAN) chan pin , zhe xie chan pin ti gong de dai kuan cong 1Mbps dao 11Mbps bu deng 。 dan shi , xian zai zhe xie wu xian wang luo chan pin zai xing neng shang huan yuan yuan bu neng yu chuan tong de gu ding wang luo chan pin xiang bi , zhe jiu shi de ru jin de wu xian wang luo zai xing neng fang mian yu cai yong GSM、AMPS deng ji shu de guang yu feng wo wang luo si hu bing mei you shi zhi xing de qu bie 。 jin guan ye zhi chi yi xie su lv jiao di (10kbps zuo you ) de shu ju tong xin , dan zhe xie wu xian wang luo de zui zhu yao de ying yong huan shi zhi chi hua yin fu wu 。 wei le man zu wei lai de Internet/Intranet fang wen de xu qiu , ye jie zheng zai kai fa xin yi dai de WLAN he feng wo wang luo ji shu , zhe xie xin yi dai de ji shu jiang zai QoS( yi bian chuang jian duo fu wu wang luo )、 an quan ji xing neng fang mian jin xing gai jin 。 ---- ben wen jie shao le you HiperLAN/ quan qiu lun tan (H2GF) kai fa de bei cheng wei HiperLAN/2 de xia yi dai wu xian LAN ji shu (WLAN)。H2GF shi you BoschTelcom、Dell、EriCsson、Nokia、TeliaMobile he TexasInstruments deng gong si fa qi de , qi zong zhi jiu shi yao tui dong HiperLAN/2 ji shu de biao zhun hua 。HiperLAN/2 zui yin ren zhu mu zhi chu shi ta neng gou zai 5GHz de pin duan shang yun xing , er chuan tong de wu xian LAN ji shu da duo shi yong 802.11 biao zhun de 2.4GHz pin duan 。HiperLAN/2 biao zhun yi jing zai qu nian di bei zui zhong que ding xia lai 。 wang luo jie gou ji gong neng ---- tu 1 xian shi le yi ge HiperLAN/2 wang luo de tuo pu jie gou 。 yi dong zhong duan (MT) tong guo yi ge you HiperLAN/2 biao zhun que ding de wu xian jie kou yu fang wen dian (AP) jin xing tong xin 。MT de yong hu ke yi zai HiperLAN/2 wang luo zhong zi you di yi dong ,HiperLAN/2 ke yi que bao yong hu he MT de dao zui jia de chuan shu xing neng 。 yi ge MT zai mou ge shi ke zhi yu yi ge AP jin xing tong xin , bu guan yong hu yi dong dao na li ,HiperLAN/2 wu xian wang luo neng gou jian ce dao mei ge shi ke neng gou wei gai MT ti gong zui jia xing neng de AP, bing zi dong jian li yu gai AP de lian xi 。 ju jie shao , zai liang ge MT zhi jian ye ke yi bu tong guo wu xian jie kou zhi jie jin xing tong xin , dan zhe zhong ji shu huan chu yu yan fa jie duan , ju ti xi jie xian zai huan wei gong kai 。 ----HiperLAN/2 ding yi le jian ce gong neng he zhuan huan xin ling , yi zhi chi xu duo wu xian wang luo gong neng , bao kuo dong tai pin lv xuan ze (DFS) gong neng 、 lian lu zi shi ying 、 wu xian xin yuan zhuan huan 、 duo shu tian xian he gong lv kong zhi deng 。 ----● dong tai pin lv xuan ze ---- gai gong neng da ying ji ge wang luo ti gong shang gong xiang ke yong de pin pu , bing qie ke yi yong lai bi mian pin lv zhi jian de xiang hu gan rao 。 mei ge AP shi tong guo you AP yi ji he ta xiang guan de MT zhi xing de guo lv gan rao ji liang lai jin xing pin lv xuan ze de 。 ----● lian lu zi shi ying ---- wei le man zu ge zhong wu xian chuan shu fu wu zhi liang de xu yao , zai xin rao bi (C/I) fang mian ,HiperLAN/2 shi yong le yi ge lian lu zi shi ying fang an 。C/I de bian hua fan wei gen ju HiperLAN/2 xi tong bu shu de wei zhi er ding , er qie , gen ju si zhou wu xian xin yuan zhong de tong xin zhuang kuang ,C/I ke yi jin xing bian hua 。 lian lu zi shi ying fang an gen ju lian lu de zhi liang ji liang ta shi ying wu li ceng de cheng du 。 yin ci , wang luo ke yi dong tai di wei mei yi ge bei fa she de MAC zhen xuan ze SCH( duan chuan shu xin dao ) he LCH( chang chuan shu xin dao )。 ----● tian xian ----HiperLAN/2 zhong zhi chi duo shu tian xian , zhe yang ke yi zeng jia wu xian wang luo de C/I bi , ti gao wu xian wang luo de xing neng 。HiperLAN/2 zhong de MAC xie yi he zhen jie gou da ying shi yong 7 shu tian xian 。 ----● zhuan huan ---- zhuan huan fang an shi you MT qi dong de , ye jiu shi shuo , mei yi ge MT dou dui si zhou de AP jin xing bi yao de jian ce , bing xuan ze zui shi he de AP jin xing tong xin 。 zhuan huan jian ce fang fa bing mei you zai HiperLAN/2 biao zhun zhong jin xing ding yi , yin ci , you de chang shang gen ju xin hao de qiang du jin xing zhuan huan , ye you de chang shang gen ju qi ta de zhi liang biao zhun jin xing zhuan huan 。HiperLAN/2 biao zhun ding yi le bi yao de xin ling lai wan cheng zhe zhong zhuan huan 。 ----● gong lv kong zhi ----HiperLAN/2 zai MT( shang xing lian lu ) he AP( xia xing lian lu ) zhong dou zhi chi fa she ji gong lv kong zhi 。MT gong lv kong zhi zhu yao yong yu jian hua AP jie shou ji de she ji 。AP gong lv kong zhi shi HiperLAN/2 biao zhun de yi bu fen 。 gong zuo yuan li ---- tu 2 biao shi le ju you yi ge MT he san ge zhi chi ju you you xian quan zhi shi Q biao ji (Qtag) de AP de HiperLAN/2 fang an 。 ---- zai HiperLAN/2 zhong , mei yi ge AP dou shi yong DFS suan fa xuan ze he shi de pin lv 。 shou xian ,MT jiang jian ce xin hao qiang du , bing xuan ze yao yu ta jian li lian xi de zui shi dang de AP。MT cong xuan zhong de AP zhong jie shou yi ge MAC hao (MACID), jin jie zhe jiao huan lian lu gong neng bing ju ci jue ding shi yong shen me yang de ren zheng guo cheng he jia mi suan fa , yi ji shi yong na yi ge ju he ceng yong yu yong hu de tong xin 。 zai mi yao jiao huan he ren zheng zhi hou ,MT yu AP jiu ke yi jian li lian xi 。 zui hou , zai shu ju lian lu kong zhi ceng (DLC) jian li yong hu lian jie , ci shi yong hu jiu ke yi jin xing tong xin le 。 ----MT jiang tong guo liang ge jian li de lian jie ( zai HiperLAN zhong que sheng zhi shi 2 ge ) shou fa shu ju , zhe liang ge lian jie zhi chi liang zhong bu tong de dai you Q biao ji yang she de you xian quan pai dui ( dang ran , ye ke yi zhi chi geng duo de you xian ji pai dui )。 yi tai wang ju he ceng que bao mei ge yi tai wang zhen de you xian ji gen ju yu xian ding yi de yang she fang an bei yang she dao shi dang de shu ju lian lu ceng yong hu lian jie zhong 。 ----MT ke yi jue ding jia ru yi ge huo duo ge duo lu guang bo xiao zu 。HiperLAN/2 wang luo ke yi bei pei zhi lai shi yong N ge dan lu guang bo , yi de dao zui li xiang de chuan shu zhi liang , ye ke yi wei mei ge jia ru de xiao zu fen pei yi ge dan du de MAC hao (MACID) yi bian wei qi bao liu dai kuan 。 jia ru yi ge dan du de MAC hao bei fen pei gei yi ge duo lu guang bo xiao zu , na me yang she fang an jiu shi :IP di zhi ——IEEE di zhi ——MAC hao 。 ---- dang MT yi dong shi , jia ru ta jian ce dao you yi ge AP geng shi he yu jin xing tong xin ( ru ju you geng hao de xin hao qiang du ), na me ta hui zhi xing yi ci zhuan huan 。 suo you yi jing jian li de lian jie jiang shi yong APAP xin ling , tong guo gu ding LAN zi dong zhuan huan dao xin de AP shang 。 dang MT( geng que qie di jiang shi yong hu ) xiang yu LAN duan kai lian jie shi ,MT jiang qing qiu duan kai lian xi , zhe yang jiu duan kai le MT he AP zhi jian de suo you lian jie 。 dang MT yi dong dao chao chu HiperLAN/2 de fu gai fan wei shi , ye hui duan kai MT he AP zhi jian de suo you lian jie 。 zhu yao te dian ----HiperLAN/2 ji shu de zhu yao te dian bao kuo yi xia ji ge fang mian : ----● gao chuan shu su lv ----HiperLAN/2 ju you hen gao de chuan shu su lv , ta de wu li ceng chuan shu su lv zui gao ke da dao 54Mbps, di san ceng de chuan shu su lv zui gao ke da dao 25Mbps。 wei le shi xian zhe yang gao de su lv ,HiperLAN/2 li yong yi zhong bei cheng wei zheng jiao pin lv shu zi fu yong (OrthogonalFrequencyDigitalMultiplexing,OFDM) de tiao zhi fang fa lai fa she mo ni xin hao 。OFDM zai shi jian fen san de huan jing ( ru ban gong shi zhong ) shi fei chang you xiao de , zhe xie di fang fa she de wu xian xin hao ke neng hui bei xu duo dian fan she , shi de ta men zai zui zhong dao da jie shou fang yi qian hui chan sheng bu tong de chuan bo shi jian 。 zai wu li ceng shang mian ,HiperLAN/2 shi yong le quan xin de mei ti kong zhi ceng (MAC) xie yi , ta shi yong yi zhong dong tai shi fen shuang gong ji shu lai zui you xiao di li yong wu xian zi yuan 。 ----● mian xiang lian jie ---- chuan tong de wu xian wang luo dou shi fei lian jie de 。 zai HiperLAN/2 wang luo zhong , xu yao xian shi yong HiperLAN/2 kong zhi ban de xin ling gong neng , zai MT he AP zhi jian jian li lian jie , ran hou cai neng jin xing shu ju chuan shu 。 lian jie shi shi yong wu xian jie kou shi fen duo zhi fu yong ji shu jian li de 。HiperLAN/2 zhong shi yong de lian jie you liang lei , ji dian dui dian de lian jie he dan dian dui duo dian de lian jie 。 dian dui dian lian jie shi shuang xiang de , er dan dian dui duo dian de lian jie shi dan xiang de , ji zhi zhi xiang yi dong zhong duan MT。 chu ci zhi wai , huan you yi ge zhuan yong de guang bo xin dao yong yu cong yi ge AP jiang shu ju fa she dao suo you de zhong duan MT。 ----●QoS zhi chi ----HiperLAN/2 de mian xiang lian jie de te xing shi ta hen qing yi man zu QoS yao qiu , ke yi wei mei ge lian jie fen pei yi ge zhi ding de QoS, que ding zhe ge lian jie zai dai kuan 、 yan chi 、 yong sai 、 bi te cuo wu lv deng fang mian de yao qiu 。 zai HiperLAN/2 zhong huan you ke neng shi yong yi ge geng jia jian dan de fang fa , ji mei ge lian jie ke yi fen pei yi ge bu tong de you xian ji biao ji 。 zhe zhong QoS zhi chi yu gao chuan shu su lv yi qi bao zheng le bu tong de shu ju xu lie ( ru shi pin 、 hua yin he shu ju deng ) ke yi tong shi jin xing gao su chuan shu 。 ----● zi dong pin lv fen pei ---- zai HiperLAN/2 wang luo zhong , bu xu yao xiang zai feng wo wang luo ( ru GSM zhong ) na yang shou gong gui hua pin lv 。 wu xian ji zhan ( zai HiperLAN/2 zhong bei cheng wei fang wen dian AP) ben shen zhi chi wei mei ge AP zai fu gai fan wei nei jin xing de chuan shu xuan ze zui shi dang de wu xian xin dao 。( shang jie di D26 ban ) mei yi ge AP dou jian shi lin jin de AP yi ji HiperLAN/2 huan jing zhong de qi ta wu xian zi yuan , bing qie gen ju wu xian xin dao yi jing bei qi ta AP zhan yong he ba dui wu xian wang luo huan jing de gan rao jiang dao zui di zhe liang ge yuan ze , xuan ze zui shi dang de chuan shu xin dao 。 ----● an quan zhi chi ----HiperLAN/2 zhi chi ren zheng he jia mi 。 tong guo shi yong ren zheng ji zhi ,AP he MT ke yi xiang hu jin xing ren zheng , yi que bao dui wang luo de shou quan fang wen ( cong AP de jiao du kan ), huo zhe que bao dui you xiao de wang luo ti gong shang de fang wen ( cong MT de jiao du kan )。HiperLAN/2 zhong de ren zheng ji zhi yao yi kao yi xie qi ta zhi chi gong neng ( ru mu lu fu wu deng ), dan zhe xie zhi chi gong neng ben shen bing bu bao kuo zai HiperLAN/2 ji shu li 。 ---- yong hu zai yi jing jian li de lian jie shang jin xing tong xin shi , ke yi shi yong jia mi ji shu lai fang zhi shi shi qie ting he zhong jian ren de gong ji 。 ----● yi dong xing zhi chi ----MT jiang neng gou zi dong cong zui jin de AP fa she he jie shou shu ju 。 geng que qie di jiang ,MT shi yong de AP suo ti gong de wu xian xin hao ju you zui jia de xin zao bi 。 yin ci , dang yong hu he MT yi dong shi ,MT you ke neng jian ce dao you ling wai yi ge bi dang qian zheng zai shi yong de AP ju you geng hao de wu xian chuan shu xing neng de AP。 ci shi ,MT jiang zi dong zhuan huan dao zhe ge AP shang 。 suo you yuan lai yi jing jian li de lian jie dou jiang bei zhuan yi dao zhe ge xin de AP shang , shi de MT reng ran chu yu HiperLAN/2 wang luo shang , yin ci bu hui dao zhi tong xin de zhong duan 。 bu guo , zai zhuan huan qi jian ke neng hui fa sheng yi xie diu bao xian xiang 。 ---- jia ru yi ge MT zai mou duan shi jian li chao chu le wu xian HiperLAN/2 de fu gai fan wei ,MT ke neng duan kai yu HiperLAN/2 wang luo de lian xi , zhe hui shi de suo you yuan you de lian jie dou bei shi fang chu lai 。 ----● wang luo he ying yong du li ----HiperLAN/2 xie yi zhan ju you yi ge ling huo de jie gou , yin ci hen qing yi yu duo zhong gu ding wang luo jin xing shi pei he ji cheng 。 ru yi ge HiperLAN/2 wang luo ke yi bei yong yu yi ge jiao huan shi yi tai wang de zui hou yi duan , dan ta ye ke neng bei yong yu qi ta de pei zhi , ru zuo wei dui di san dai feng wo wang luo de yi ge fang wen wang luo 。 suo you jin tian ke yi zai gu ding wang luo zhong yun xing de ying yong dou ke yi zai HiperLAN/2 wang luo zhong yun xing 。 ----● gong hao di ---- zai HiperLAN/2 zhong ,MT jie sheng gong hao de ji zhi shi ji yu MT qi dong de xiu mian qi zhuang tai 。MT ke yi zai ren yi shi ke qing qiu AP jin ru yi zhong di gong lv xiu mian zhuang tai , er qie ke yi que ding zhe yi zhuang tai de shi jian 。 dang xie shang hao de xiu mian qi man shi ,MT sou suo shi fou you AP fa chu de huan xing zhi shi 。 jia ru mei you sou suo dao huan xing zhi shi ,MT jiang chong xin zhuan huan dao di gong lv zhuang tai jin ru xia yi ge xiu mian qi 。 zai xiu mian qi jian ,AP jiang yan chi suo you deng dai de shu ju chuan shu ren wu , zhi dao MT zhong jie shu xiang ying de xiu mian qi wei zhi 。HiperLAN/2 zhi chi bu tong de xiu mian shi jian , zhe yang ke yi man zu yong hu dui duan yan chi huo di gong lv deng bu tong de xu qiu 。 ying yong ling yu ----HiperLAN/2 de ying yong ling yu fei chang guang fan , xia mian shi yi xie zui dian xing de ying yong ling yu 。 ----● qi ye LAN ---- tu 3 biao shi le shi yong yi tai wang LAN he IP lu you qi jian li de qi ye wang luo , zai zhe ge wang luo zhong , yi ge HiperLAN/2 wang luo bei yong zuo MT he LAN zhi jian de zui hou yi duan 。HiperLAN/2 wang luo zhi chi tong yi ge LAN/ zi wang (Subnet) zhong de yi dong xing 。 zai zi wang zhi jian yi dong jiu yi wei zhe IP ju you ke yi dong xing 。 ----● chong yao di dian ----HiperLAN/2 ke yi bu shu zai yi xie chong yao di dian ( ru ji chang 、 bin guan deng ), yi bian wei zheng zai lv xing de yong hu ti gong yuan cheng fang wen he Internet fu wu 。 yu HiperLAN/2 lian jie de fang wen fu wu qi da ying dian dui dian lian jie , ye ke yi fang wen te ding de qi ye wang luo ( ke neng xu yao tong guo te ding de ISP)。 ----● fang wen di san dai feng wo wang luo ---- yong hu ke yi tong guo HiperLAN/2 fang wen di san dai feng wo wang luo ( ru WCDMA deng )。 jiang lai ,HiperLAN/2 he WCDMA ji shu fu gai de di qu bi jiang yue lai yue guang fan , er yong hu ke yi cong zhong de dao zui da de hao chu , ta men bu jin ke yi shi yong HiperLAN/2 ti gong de fu wu , er qie zai mei you HiperLAN/2 de di fang reng ran ke yi shi yong WCDMA feng wo wang luo fu wu 。 dang yong hu zai liang lei wang luo zhi jian yi dong shi , gai xin wang luo ke yi bao zheng yong hu wu feng di zi dong zai liang lei wang luo zhi jian jin xing zhuan huan 。 ----● jia ting wang luo ----HiperLAN ke yi wei jia ting huan jing chuang jian yi ge wu xian ji chu she shi , yong yu jia yong she bei ( ru jia yong PC、VCR、 zhao xiang ji he da yin ji deng ) de lian wang 。HiperLAN/2 de gao shu chu he QoS te xing ke yi man zu ge zhong jia yong she bei shi pin chuan shu yu shu ju tong xin de yao qiu 。 zai zhe zhong qing kuang xia ,AP ke neng hui ti gong yi ge dao gong zhong Internet de “ shang xing ” lian lu 。
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