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HiperLAN/2 de xie yi jie gou

2008-05-31 18:32:26 编辑來源:互联网 评论
 
 
 
本文为【HiperLAN/2的协议结构】的拼音翻译版
  HiperLAN/2 de xie yi zhan you liang da bu fen zu cheng : kong zhi bu fen he yong hu bu fen 。 yong hu bu fen zhu yao fu ze tong guo yi jian li de lian jie xin dao jin xing tong xin , er kong zhi bu fen zhu yao fu ze dui lian jie jian li 、 shi fang he jian du deng jin xing kong zhi he zhi li 。HiperLAN/2 de xie yi jie gou ke yi fen wei san ge ji ben ceng : wu li ceng (PHY)、 shu ju lian lu kong zhi ceng (DLC) he ju he ceng (CL)。 tu 1 biao shi le HiperLAN/2 de xie yi shen kao mo xing 。
  wu li ceng
  ----HiperLAN/2 wu li ceng de chuan shu fang shi wei cu fa , ta you qian dao bu fen he shu ju bu fen zu cheng , er shu ju nei rong zhu yao lai yuan yu DLC zhong de mei tiao chuan shu xin dao 。HiperLAN/2 shi yong zheng jiao pin fen duo lu fu yong (OFDM) ji shu , zhe zhu yao shi yin wei ta bei yong yu gao du fen san de xin dao shi ju you you yi de xing neng 。 xie yi gui ding xin dao jian ju wei 20MHz, zhe yang , mei ge xin dao bu dan ke yi ju you gao bi te lv , er qie zai fen pei de pin pu nei ke yi ti gong de xin dao shu liang ye bi jiao he shi ( ru ou zhou wei 19 tiao xin dao )。 mei tiao xin dao shi yong 52 ge zi zai bo , qi zhong 48 ge zi zai bo xie dai shi ji shu ju , qi yu 4 ge zi zai bo xie dai dao pin xin xi 。 bao hu jian ge de shi chang shi 800ns, zhe ge shi jian zu yi shi de yan chi kuo san gao da 250ns de xin dao ju you liang hao de xing neng 。 zai jiao xiao de shi nei huan jing zhong , ke yi xuan yong geng duan de shi chang wei 400ns de bao hu jian ge 。
  ---- wu li ceng de yi ge chong yao zuo yong shi ti gong tiao zhi he bian ma gong neng 。 ta bu jin fei chang shi he yu dang qian de wu xian lian lu zhi liang , er qie neng gou man zu bu tong de wu li ceng te xing 。HiperLAN/2 huan zhi chi BPSK、QPSK he 16QAM、64QAM deng zi zai bo tiao zhi fang an 。 xia biao biao shi le HiperLAN/2 wu li ceng de ji zhong mo shi :
  shu ju lian lu ceng
  ---- shu ju lian lu ceng (DLC) you AP he MT zhi jian de luo ji lian lu zu cheng 。DLC bao kuo mei ti fang wen he chuan shu ( yong hu bu fen ) gong neng , yi ji yong yu zhong duan / yong hu de lian jie chu li ( kong zhi bu fen ) gong neng 。 yin ci ,DLC ceng you yi xia ji ge bu fen zu cheng : mei ti fang wen kong zhi (MAC) xie yi 、 cha cuo kong zhi (EC) xie yi yi ji ge zhong xin ling he kong zhi xie yi deng 。
  ----1.MAC xie yi
  ----MAC xie yi zhu yao yong yu wu xian lian lu de mei ti fang wen 。 zai HiperLAN/2 zhong , wu xian jie kou shi ji yu shi fen shuang gong (TDD) he dong tai shi fen duo lu fang wen (TDMA) de , ru mei ti de shi xi jie gou da ying xia xing lian lu he shang xing lian lu ke yi zai xiang tong de shi zhen ( zai HiperLAN/2 zhong cheng wei MAC zhen ) zhong jin xing tong xin 。 xia xing lian lu he shang xing lian lu de shi xi gen ju chuan shu zi yuan de xu qiu dong tai fen pei 。 wu xian jie kou zhong de ji ben MAC jie gou ju you 2ns de gu ding shi chang , ta bao kuo yong yu guang bo kong zhi 、 zhen kong zhi 、 fang wen kong zhi 、 xia xing lian lu (DL) he shang xing lian lu (UL)、 shu ju chuan shu he sui ji fang wen deng de chuan shu xin dao ( ru tu 2)。 lai zi AP he MT de suo you shu ju dou fen pei zhuan yong de shi xi jin xing fa she 。 guang bo kong zhi de shi chang shi gu ding de , qi ta bu fen de shi chang ze gen ju dang shi de tong xin qing kuang dong tai bian hua 。MAC zhen he chuan shu xin dao gou cheng le DLC he wu li ceng zhi jian de jie kou 。
  ---- zai tu 2 zhong , guang bo xin dao (BCH) bao han kong zhi xin xi , zhe xie kong zhi xin xi tong guo mei ge MAC zhen jin xing fa song bing qie dao da suo you de MT。BCH ti gong you guan chuan shu gong lv ji bie 、FCH he RCH de qi shi dian he chang du 、 huan xing zhi shi qi deng xin xi 。 zhen kong zhi xin dao (FCH) ju ti miao shu zai dang qian de MAC zhen zhong zi yuan de fen pei qing kuang 。 fang wen fan kui xin dao (ACH) chuan shu xian qian dui RCH de fang wen qing qiu de you guan xin xi 。MT huan shi yong sui ji fang wen xin dao (RCH), wei dao lai de MAC zhen de shang xing chuan shu huo xia xing chuan shu qing qiu chuan shu zi yuan , bing chuan shu mou xie RLC xin ling xin xi 。 dang MT fa chu de yao qiu geng duo chuan shu zi yuan de qing qiu zeng jia shi ,AP jiang fen pei geng duo de zi yuan gei RCH。
  ---- zai shang xing lian lu he xia xing lian lu zhong , bao han wang lai yu MT zhi jian de PDU。 mei ge PDU you MT jie shou huo fa she de DLC yong hu PDU he DLC kong zhi PDU zu cheng 。CPDU bei cheng wei duan chuan shu xin dao , er UPDU ze bei cheng wei chang chuan shu xin dao (LCH)。
  ----2. cha cuo kong zhi (EC) xie yi
  ---- xuan ze xing chong fu shi ARQ shi yi zhong yong yu zeng jia wu xian lian lu ke kao xing de cha cuo kong zhi ji zhi 。HiperLAN/2 zhong de EC zhu yao shi zhi bi te cuo wu de jian ce yi ji dang cuo wu fa sheng shi UPDU de chong fa 。EC ji zhi huan ke yi que bao UPDU an shun xu chuan shu dao ju he ceng zhong 。 cha cuo kong zhi de fang fa shi dui mei ge lian jie zhong de mei ge bei fa she de UPDU fen pei yi ge xu lie hao 。 zai lian lu kong zhi xin dao zhong dai you ARQACK/NACK xin xi , fa sheng cuo wu de UPDU ke yi bei duo ci chong fa 。
  ---- wei le zhi chi yan chi yao hai ying yong de QoS yao qiu ,HiperLAN/2 ding yi le yi ge UPDU diu qi ji zhi 。 jia ru shu ju bao zuo fei le ,EC xie yi de fa song fang ke yi diu qi yi ge huo duo ge UPDU。
  ----3. xin ling xie yi he kong zhi
  ---- wu xian lian lu kong zhi (RLC) xie yi wei xin ling shi ti lian jie kong zhi gong neng (ACF)、 wu xian zi yuan kong zhi (RRC) gong neng he DLC yong hu lian jie kong zhi (DCC) gong neng ti gong chuan shu fu wu 。 zhe si zhe zu cheng le yong lai zai AP he MT zhi jian jiao huan xin ling xin xi de DLC kong zhi bu fen 。
  ----● lian jie kong zhi gong neng
  ----MT jian ting lai zi bu tong AP de BCH bing qie xuan ze ju you zui jia wu xian lian lu zhi liang de AP。BCH zhong ti gong de bu fen xin xi zai zhe ge jie duan zuo wei yi ge xin biao xin hao gong zuo 。MT jian ting SBCH( duan guang bo xin dao ) de guang bo , yi bi mian lian jie na xie wu fa huo wei bei da ying wei MT yong hu ti gong fu wu de wang luo 。 jia ru MT jue ding ji xu jin xing lian jie , ta jiang fa chu qing qiu bing qie cong AP zhong fen pei yi ge MAC hao 。 ci hou ACF jiang yu AP jiao huan you guan zhi chi de wu li ceng mo shi 、 ju he ceng yi ji ren zheng he jia mi suan fa deng xin xi 。AP jiang ba zhi chi de wu li ceng mo shi 、 xuan ze de ju he ceng yi ji xuan ze de ren zheng he jia mi suan fa ( ke yi xuan ze bu shi yong ren zheng he jia mi gong neng ) deng xin xi gao su ACF。 zai jian li lian jie yi hou ,MT ke yi qing qiu yi ge zhuan yong de kong zhi xin dao ( ru DCCH) lai jian li wu xian cheng zai dian lu 。 zai HiperLAN/2 zhong , wu xian cheng zai dian lu ye cheng wei DLC yong hu lian jie 。MT ke yi qing qiu duo ge DLC lian jie , er qie mei ge lian jie ke yi zhi chi bu tong de QoS yao qiu 。
  ----MT ke yi zhu dong huo bei dong di chai chu lian jie 。 dang zhu dong chai chu lian jie shi ,MT jiang tong zhi AP ta bu zai xiang tong guo HiperLAN/2 wang luo jin xing tong xin de xin xi 。 bei dong chai chu lian jie yi wei zhe MT zai mou ge shi jian duan wu fa dao da AP。 zai ren he yi zhong qing kuang xia ,AP dou jiang shi fang fen pei gei gai MT de suo you zi yuan 。
  ----●DLC yong hu lian jie kong zhi
  ----MT yi ji AP tong guo fa she xin ling xin xi lai qing qiu DLC yong hu lian jie 。 zhuan yong kong zhi xin dao kong zhi mou ge te ding MAC shi ti ( you MAC hao que ding ) de zi yuan 。AP he MT zhi jian zhi shao yao you yi ge DLC yong hu lian jie cun zai , cai neng wei yong hu ti gong tong xin fa she fu wu 。 xin ling xin xi xiang dang jian dan , ta zhi xie dai liang bu fen xin xi : yi bu fen shi qing qiu xin xi , jia ru ke yi jian li lian jie de hua , huan hui xie dai que ren xin xi 。 yi jian li de lian jie you AP fen pei de DLC lian jie biao zhi fu jin xing biao ji 。
  ---- zai HiperLAN/2 zhong , lian jie de shi fang guo cheng yu lian jie de jian li guo cheng lei si 。HiperLAN/2 huan zhi chi dui yi jian li de lian jie de te xing jin xing xiu gai 。
  ----● wu xian zi yuan kong zhi
  ---- zhuan huan shi yi wu xian lian lu zhi liang jian ce wei ji chu de , ta zhu yao you MT qing qiu he qi dong 。HiperLAN/2 zhi chi liang zhong xing shi de zhuan huan : chong xin lian jie huo xin lao AP zhuan huan 。 chong xin lian jie shi zhi chong xin jian li lian jie ; xin lao AP zhuan huan shi zhi MT qing qiu jiang zhuan huan dao de xin AP hui fu lai zi lao AP de lian jie xin xi , zhe yang jiu ke yi ji xu chuan shu yuan lai AP yao chuan shu de nei rong 。 zhe zhong ban fa ke yi shi zhuan huan qi jian yong hu tong xin de chuan shu sun shi jiang dao zui di 。
  ----RRC da ying AP kong zhi MT bu jian duan di jian ting lin jin AP xin hao qiang du , you yu huan jing he wang luo tuo pu jie gou de bian hua ,RRC zai bi yao shi huan neng gou jiang AP gai bian pin lv de xin xi tong zhi yi jian li lian jie de MT。AP huan neng gou jian shi zai shang xing lian lu zhong bu fa she ren he tong xin xin xi de bu huo dong MT, bu huo dong de MT jiang bei chai chu lian jie 。
  ----RRC zhi chi dian yuan jie sheng gong neng 。 zhe ge gong neng fu ze jin ru huo tui chu di xiao hao mo shi bing qie fu ze kong zhi fa she ji de gong lv 。
  ju he ceng
  ---- ju he ceng (CL) ju you liang ge zhu yao gong neng : yi shi jiang lai zi gao ceng de fu wu qing qiu shi pei cheng you DLC ti gong de fu wu ; er shi jiang ju you ke bian huo gu ding chang du de gao ceng shu ju fen zu (SDU) zhuan huan cheng ke yi zai DLC zhong shi yong de gu ding chang du de shu ju fen zu 。 gu ding chang du DLC shu ju de tian chong 、 fen zu he chong zu gong neng shi shi xian HiperLAN/2 wang luo lian jie du li yu gu ding wang luo de yao hai 。 ju he ceng de jie gou shi de HiperLAN/2 fei chang shi he yu zuo wei xu duo gu ding wang luo de wu xian fang wen bu fen , ru yi tai wang 、IP wang 、ATM、IMT2000 deng 。
  ---- dang qian ,HiperLAN/2 zhu yao ding yi le ji yu xin yuan he ji yu fen zu de liang lei bu tong de CL( ru tu 3 suo shi ), qian zhe yong yu yu ATM wang luo de xiang hu lian jie , er hou zhe gen ju gu ding wang luo lei xing yi ji hu lian fang shi de bu tong , ke yi yong yu duo zhong pei zhi 。
  ---- ji yu fen zu de CL ju you yi ge tong yong bu jian he yi ge yi yu shi pei dao bu tong pei zhi he gu ding wang luo de you fu wu que ding de bu jian 。 zui zao de HiperLAN/2 biao zhun que ding tong yong bu jian he yi ge yong yu yu gu ding yi tai wang hu lian de fu wu te ding de bu jian 。
  ---- ju he ceng tong yong bu jian de zhu yao gong neng shi jiang cong SSCS( fu wu te ding de ju he zi ceng ) zhong shou dao de shu ju bao jin xing fen zu , bing qie jiang cong DLC zhong jie shou dao de shu ju bao zai chuan shu gei dui ying de SSCS zhi qian jin xing chong zu 。 zai xu yao shi , ju he ceng ye jin xing zeng jia / shan chu tian chong zi jie , yi bian shi tong yong bu jian PDU cheng wei yi ge zheng shu DLCSDU。
  ---- yi tai wang SSCS shi HiperLAN/2 wang luo kan shang qu lei si yu jiao huan shi yi tai wang de yi ge wu xian bu fen 。 ta de zhu yao gong neng shi bao cun yi tai wang zhen 。HiperLAN/2 biao zhun que ding de yi tai wang SSCS zhen ti gong liang zhong QoS fang an : zui jia xiao lv fang an he ji yu IEEE802.1p de you xian ji fang an 。 qian zhe shi qiang zhi zhi chi de , ta dui suo you de tong xin dou tong yang dui dai ; hou zhe shi ke xuan de , ta jiang tong xin fen cheng wei bu tong de you xian ji dui lie jin xing chu li 。【原文】【汉音对照
 
 
 
 
 
 
 
 
 
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  HiperLAN/2 de xie yi zhan you liang da bu fen zu cheng : kong zhi bu fen he yong hu bu fen 。 yong hu bu fen zhu yao fu ze tong guo yi jian li de lian jie xin dao jin xing tong xin , er kong zhi bu fen zhu yao fu ze dui lian jie jian li 、 shi fang he jian du deng jin xing kong zhi he zhi li 。HiperLAN/2 de xie yi jie gou ke yi fen wei san ge ji ben ceng : wu li ceng (PHY)、 shu ju lian lu kong zhi ceng (DLC) he ju he ceng (CL)。 tu 1 biao shi le HiperLAN/2 de xie yi shen kao mo xing 。 wu li ceng ----HiperLAN/2 wu li ceng de chuan shu fang shi wei cu fa , ta you qian dao bu fen he shu ju bu fen zu cheng , er shu ju nei rong zhu yao lai yuan yu DLC zhong de mei tiao chuan shu xin dao 。HiperLAN/2 shi yong zheng jiao pin fen duo lu fu yong (OFDM) ji shu , zhe zhu yao shi yin wei ta bei yong yu gao du fen san de xin dao shi ju you you yi de xing neng 。 xie yi gui ding xin dao jian ju wei 20MHz, zhe yang , mei ge xin dao bu dan ke yi ju you gao bi te lv , er qie zai fen pei de pin pu nei ke yi ti gong de xin dao shu liang ye bi jiao he shi ( ru ou zhou wei 19 tiao xin dao )。 mei tiao xin dao shi yong 52 ge zi zai bo , qi zhong 48 ge zi zai bo xie dai shi ji shu ju , qi yu 4 ge zi zai bo xie dai dao pin xin xi 。 bao hu jian ge de shi chang shi 800ns, zhe ge shi jian zu yi shi de yan chi kuo san gao da 250ns de xin dao ju you liang hao de xing neng 。 zai jiao xiao de shi nei huan jing zhong , ke yi xuan yong geng duan de shi chang wei 400ns de bao hu jian ge 。 ---- wu li ceng de yi ge chong yao zuo yong shi ti gong tiao zhi he bian ma gong neng 。 ta bu jin fei chang shi he yu dang qian de wu xian lian lu zhi liang , er qie neng gou man zu bu tong de wu li ceng te xing 。HiperLAN/2 huan zhi chi BPSK、QPSK he 16QAM、64QAM deng zi zai bo tiao zhi fang an 。 xia biao biao shi le HiperLAN/2 wu li ceng de ji zhong mo shi : shu ju lian lu ceng ---- shu ju lian lu ceng (DLC) you AP he MT zhi jian de luo ji lian lu zu cheng 。DLC bao kuo mei ti fang wen he chuan shu ( yong hu bu fen ) gong neng , yi ji yong yu zhong duan / yong hu de lian jie chu li ( kong zhi bu fen ) gong neng 。 yin ci ,DLC ceng you yi xia ji ge bu fen zu cheng : mei ti fang wen kong zhi (MAC) xie yi 、 cha cuo kong zhi (EC) xie yi yi ji ge zhong xin ling he kong zhi xie yi deng 。 ----1.MAC xie yi ----MAC xie yi zhu yao yong yu wu xian lian lu de mei ti fang wen 。 zai HiperLAN/2 zhong , wu xian jie kou shi ji yu shi fen shuang gong (TDD) he dong tai shi fen duo lu fang wen (TDMA) de , ru mei ti de shi xi jie gou da ying xia xing lian lu he shang xing lian lu ke yi zai xiang tong de shi zhen ( zai HiperLAN/2 zhong cheng wei MAC zhen ) zhong jin xing tong xin 。 xia xing lian lu he shang xing lian lu de shi xi gen ju chuan shu zi yuan de xu qiu dong tai fen pei 。 wu xian jie kou zhong de ji ben MAC jie gou ju you 2ns de gu ding shi chang , ta bao kuo yong yu guang bo kong zhi 、 zhen kong zhi 、 fang wen kong zhi 、 xia xing lian lu (DL) he shang xing lian lu (UL)、 shu ju chuan shu he sui ji fang wen deng de chuan shu xin dao ( ru tu 2)。 lai zi AP he MT de suo you shu ju dou fen pei zhuan yong de shi xi jin xing fa she 。 guang bo kong zhi de shi chang shi gu ding de , qi ta bu fen de shi chang ze gen ju dang shi de tong xin qing kuang dong tai bian hua 。MAC zhen he chuan shu xin dao gou cheng le DLC he wu li ceng zhi jian de jie kou 。 ---- zai tu 2 zhong , guang bo xin dao (BCH) bao han kong zhi xin xi , zhe xie kong zhi xin xi tong guo mei ge MAC zhen jin xing fa song bing qie dao da suo you de MT。BCH ti gong you guan chuan shu gong lv ji bie 、FCH he RCH de qi shi dian he chang du 、 huan xing zhi shi qi deng xin xi 。 zhen kong zhi xin dao (FCH) ju ti miao shu zai dang qian de MAC zhen zhong zi yuan de fen pei qing kuang 。 fang wen fan kui xin dao (ACH) chuan shu xian qian dui RCH de fang wen qing qiu de you guan xin xi 。MT huan shi yong sui ji fang wen xin dao (RCH), wei dao lai de MAC zhen de shang xing chuan shu huo xia xing chuan shu qing qiu chuan shu zi yuan , bing chuan shu mou xie RLC xin ling xin xi 。 dang MT fa chu de yao qiu geng duo chuan shu zi yuan de qing qiu zeng jia shi ,AP jiang fen pei geng duo de zi yuan gei RCH。 ---- zai shang xing lian lu he xia xing lian lu zhong , bao han wang lai yu MT zhi jian de PDU。 mei ge PDU you MT jie shou huo fa she de DLC yong hu PDU he DLC kong zhi PDU zu cheng 。CPDU bei cheng wei duan chuan shu xin dao , er UPDU ze bei cheng wei chang chuan shu xin dao (LCH)。 ----2. cha cuo kong zhi (EC) xie yi ---- xuan ze xing chong fu shi ARQ shi yi zhong yong yu zeng jia wu xian lian lu ke kao xing de cha cuo kong zhi ji zhi 。HiperLAN/2 zhong de EC zhu yao shi zhi bi te cuo wu de jian ce yi ji dang cuo wu fa sheng shi UPDU de chong fa 。EC ji zhi huan ke yi que bao UPDU an shun xu chuan shu dao ju he ceng zhong 。 cha cuo kong zhi de fang fa shi dui mei ge lian jie zhong de mei ge bei fa she de UPDU fen pei yi ge xu lie hao 。 zai lian lu kong zhi xin dao zhong dai you ARQACK/NACK xin xi , fa sheng cuo wu de UPDU ke yi bei duo ci chong fa 。 ---- wei le zhi chi yan chi yao hai ying yong de QoS yao qiu ,HiperLAN/2 ding yi le yi ge UPDU diu qi ji zhi 。 jia ru shu ju bao zuo fei le ,EC xie yi de fa song fang ke yi diu qi yi ge huo duo ge UPDU。 ----3. xin ling xie yi he kong zhi ---- wu xian lian lu kong zhi (RLC) xie yi wei xin ling shi ti lian jie kong zhi gong neng (ACF)、 wu xian zi yuan kong zhi (RRC) gong neng he DLC yong hu lian jie kong zhi (DCC) gong neng ti gong chuan shu fu wu 。 zhe si zhe zu cheng le yong lai zai AP he MT zhi jian jiao huan xin ling xin xi de DLC kong zhi bu fen 。 ----● lian jie kong zhi gong neng ----MT jian ting lai zi bu tong AP de BCH bing qie xuan ze ju you zui jia wu xian lian lu zhi liang de AP。BCH zhong ti gong de bu fen xin xi zai zhe ge jie duan zuo wei yi ge xin biao xin hao gong zuo 。MT jian ting SBCH( duan guang bo xin dao ) de guang bo , yi bi mian lian jie na xie wu fa huo wei bei da ying wei MT yong hu ti gong fu wu de wang luo 。 jia ru MT jue ding ji xu jin xing lian jie , ta jiang fa chu qing qiu bing qie cong AP zhong fen pei yi ge MAC hao 。 ci hou ACF jiang yu AP jiao huan you guan zhi chi de wu li ceng mo shi 、 ju he ceng yi ji ren zheng he jia mi suan fa deng xin xi 。AP jiang ba zhi chi de wu li ceng mo shi 、 xuan ze de ju he ceng yi ji xuan ze de ren zheng he jia mi suan fa ( ke yi xuan ze bu shi yong ren zheng he jia mi gong neng ) deng xin xi gao su ACF。 zai jian li lian jie yi hou ,MT ke yi qing qiu yi ge zhuan yong de kong zhi xin dao ( ru DCCH) lai jian li wu xian cheng zai dian lu 。 zai HiperLAN/2 zhong , wu xian cheng zai dian lu ye cheng wei DLC yong hu lian jie 。MT ke yi qing qiu duo ge DLC lian jie , er qie mei ge lian jie ke yi zhi chi bu tong de QoS yao qiu 。 ----MT ke yi zhu dong huo bei dong di chai chu lian jie 。 dang zhu dong chai chu lian jie shi ,MT jiang tong zhi AP ta bu zai xiang tong guo HiperLAN/2 wang luo jin xing tong xin de xin xi 。 bei dong chai chu lian jie yi wei zhe MT zai mou ge shi jian duan wu fa dao da AP。 zai ren he yi zhong qing kuang xia ,AP dou jiang shi fang fen pei gei gai MT de suo you zi yuan 。 ----●DLC yong hu lian jie kong zhi ----MT yi ji AP tong guo fa she xin ling xin xi lai qing qiu DLC yong hu lian jie 。 zhuan yong kong zhi xin dao kong zhi mou ge te ding MAC shi ti ( you MAC hao que ding ) de zi yuan 。AP he MT zhi jian zhi shao yao you yi ge DLC yong hu lian jie cun zai , cai neng wei yong hu ti gong tong xin fa she fu wu 。 xin ling xin xi xiang dang jian dan , ta zhi xie dai liang bu fen xin xi : yi bu fen shi qing qiu xin xi , jia ru ke yi jian li lian jie de hua , huan hui xie dai que ren xin xi 。 yi jian li de lian jie you AP fen pei de DLC lian jie biao zhi fu jin xing biao ji 。 ---- zai HiperLAN/2 zhong , lian jie de shi fang guo cheng yu lian jie de jian li guo cheng lei si 。HiperLAN/2 huan zhi chi dui yi jian li de lian jie de te xing jin xing xiu gai 。 ----● wu xian zi yuan kong zhi ---- zhuan huan shi yi wu xian lian lu zhi liang jian ce wei ji chu de , ta zhu yao you MT qing qiu he qi dong 。HiperLAN/2 zhi chi liang zhong xing shi de zhuan huan : chong xin lian jie huo xin lao AP zhuan huan 。 chong xin lian jie shi zhi chong xin jian li lian jie ; xin lao AP zhuan huan shi zhi MT qing qiu jiang zhuan huan dao de xin AP hui fu lai zi lao AP de lian jie xin xi , zhe yang jiu ke yi ji xu chuan shu yuan lai AP yao chuan shu de nei rong 。 zhe zhong ban fa ke yi shi zhuan huan qi jian yong hu tong xin de chuan shu sun shi jiang dao zui di 。 ----RRC da ying AP kong zhi MT bu jian duan di jian ting lin jin AP xin hao qiang du , you yu huan jing he wang luo tuo pu jie gou de bian hua ,RRC zai bi yao shi huan neng gou jiang AP gai bian pin lv de xin xi tong zhi yi jian li lian jie de MT。AP huan neng gou jian shi zai shang xing lian lu zhong bu fa she ren he tong xin xin xi de bu huo dong MT, bu huo dong de MT jiang bei chai chu lian jie 。 ----RRC zhi chi dian yuan jie sheng gong neng 。 zhe ge gong neng fu ze jin ru huo tui chu di xiao hao mo shi bing qie fu ze kong zhi fa she ji de gong lv 。 ju he ceng ---- ju he ceng (CL) ju you liang ge zhu yao gong neng : yi shi jiang lai zi gao ceng de fu wu qing qiu shi pei cheng you DLC ti gong de fu wu ; er shi jiang ju you ke bian huo gu ding chang du de gao ceng shu ju fen zu (SDU) zhuan huan cheng ke yi zai DLC zhong shi yong de gu ding chang du de shu ju fen zu 。 gu ding chang du DLC shu ju de tian chong 、 fen zu he chong zu gong neng shi shi xian HiperLAN/2 wang luo lian jie du li yu gu ding wang luo de yao hai 。 ju he ceng de jie gou shi de HiperLAN/2 fei chang shi he yu zuo wei xu duo gu ding wang luo de wu xian fang wen bu fen , ru yi tai wang 、IP wang 、ATM、IMT2000 deng 。 ---- dang qian ,HiperLAN/2 zhu yao ding yi le ji yu xin yuan he ji yu fen zu de liang lei bu tong de CL( ru tu 3 suo shi ), qian zhe yong yu yu ATM wang luo de xiang hu lian jie , er hou zhe gen ju gu ding wang luo lei xing yi ji hu lian fang shi de bu tong , ke yi yong yu duo zhong pei zhi 。 ---- ji yu fen zu de CL ju you yi ge tong yong bu jian he yi ge yi yu shi pei dao bu tong pei zhi he gu ding wang luo de you fu wu que ding de bu jian 。 zui zao de HiperLAN/2 biao zhun que ding tong yong bu jian he yi ge yong yu yu gu ding yi tai wang hu lian de fu wu te ding de bu jian 。 ---- ju he ceng tong yong bu jian de zhu yao gong neng shi jiang cong SSCS( fu wu te ding de ju he zi ceng ) zhong shou dao de shu ju bao jin xing fen zu , bing qie jiang cong DLC zhong jie shou dao de shu ju bao zai chuan shu gei dui ying de SSCS zhi qian jin xing chong zu 。 zai xu yao shi , ju he ceng ye jin xing zeng jia / shan chu tian chong zi jie , yi bian shi tong yong bu jian PDU cheng wei yi ge zheng shu DLCSDU。 ---- yi tai wang SSCS shi HiperLAN/2 wang luo kan shang qu lei si yu jiao huan shi yi tai wang de yi ge wu xian bu fen 。 ta de zhu yao gong neng shi bao cun yi tai wang zhen 。HiperLAN/2 biao zhun que ding de yi tai wang SSCS zhen ti gong liang zhong QoS fang an : zui jia xiao lv fang an he ji yu IEEE802.1p de you xian ji fang an 。 qian zhe shi qiang zhi zhi chi de , ta dui suo you de tong xin dou tong yang dui dai ; hou zhe shi ke xuan de , ta jiang tong xin fen cheng wei bu tong de you xian ji dui lie jin xing chu li 。
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