国产在线中文字幕亚洲,一区视频国产精品观看,欧美日韩国产高清片,久久久久久AV无码免费网站,亚洲无码一二三四五区,日韩无码www.,sese444

鎮ㄥソ锛屾杩庝締(l谩i)鍒扮董搴�(k霉)闆诲瓙甯傚牬(ch菐ng)缍�(w菐ng) 鐧婚寗 | 鍏嶈不(f猫i)娉ㄥ唺(c猫)

3G缍�(w菐ng)绲�(lu貌)
闁辫畝锛�10591鏅�(sh铆)闁擄細2011-03-23 15:21:11

銆�銆�3G鏄�3rd Generation鐨勭府瀵�(xi臎)锛屾寚绗笁浠ｇЩ鍕�(d貌ng)閫氫俊鎶�琛�(sh霉)銆傜浉灏�(du矛)浠ｆā鎿埗寮忔墜姗�(j墨)锛�1G锛夊拰绗簩浠�GSM銆乀DMA绛夋暩(sh霉)瀛楁墜姗�(j墨)锛�2G锛夛紝绗笁浠ｆ墜姗�(j墨)鏄寚灏囩劇(w煤)绶氶�氫俊鑸囦簰鑱�(li谩n)缍�(w菐ng)绛夊濯掗珨閫氫俊绲�(ji茅)鍚堢殑鏂颁竴浠ｇЩ鍕�(d貌ng)閫氫俊绯荤当(t菕ng)銆傚畠鑳藉铏曠悊鍦栧儚銆侀煶妯�(l猫)銆佽闋绘祦绛夊绋獟楂斿舰寮忥紝鎻愪緵鍖呮嫭缍�(w菐ng)闋�(y猫)鐎忚銆侀浕瑭辨渻(hu矛)璀般�侀浕瀛愬晢鍕�(w霉)绛夊绋俊鎭湇鍕�(w霉)銆傜偤浜嗘彁渚涢�欑ó鏈嶅嫏(w霉)锛�鐒�(w煤)绶氱恫(w菐ng)绲�(lu貌)蹇呴爤鑳藉鏀寔涓嶅悓鐨勬暩(sh霉)鎿�(j霉)鍌宠几閫熷害锛屼篃灏辨槸瑾�(shu艒)鍦ㄥ鍏�(n猫i)銆佸澶栧拰琛岃粖(ch膿)鐨勭挵(hu谩n)澧冧腑鑳藉鍒嗗垾鏀寔鑷冲皯2M/s銆�384k/s浠ュ強144k/s鐨勫偝杓搁�熷害銆�CDMA琚獚(r猫n)鐐烘槸绗笁浠ｇЩ鍕�(d貌ng)閫氫俊锛�3G锛夋妧琛�(sh霉)鐨�锛岀洰鍓嶇殑妯�(bi膩o)婧�(zh菙n)鏈塛CDMA銆丆DMA2000銆乀D-SCDMA銆�

3G鑸�2G鐨勫崁(q奴)鍒�

銆�銆�3G鏄嫳鏂�3rdGeneration鐨勭府瀵�(xi臎)锛屾槸涓嬩竴浠ｇЩ鍕�(d貌ng)閫氫俊绯荤当(t菕ng)鐨勯�氱ū(ch膿ng)銆傜浉灏�(du矛)绗簩浠SM銆乀DMA绛夋暩(sh霉)瀛楁墜姗�(j墨)锛�2G锛�锛岀涓変唬涓�鑸湴璎�锛屾槸鎸囧皣鐒�(w煤)绶氶�氫俊鑸囧湅(gu贸)闅涗簰鑱�(li谩n)缍�(w菐ng)绛夊濯掗珨閫氫俊绲�(ji茅)鍚堢殑鏂颁竴浠ｇЩ鍕�(d貌ng)閫氫俊绯荤当(t菕ng)銆傚畠鑳藉铏曠悊鍦栧儚銆侀煶妯�(l猫)銆佽闋绘祦绛夊绋獟楂斿舰寮�锛屾彁渚涘寘鎷恫(w菐ng)闋�(y猫)鐎忚銆侀浕瑭辨渻(hu矛)璀�銆侀浕瀛愬晢鍕�(w霉)绛夊绋俊鎭湇鍕�(w霉)銆傜偤浜嗘彁渚涢�欑ó鏈嶅嫏(w霉)锛岀劇(w煤)绶氱恫(w菐ng)绲�(lu貌)蹇呴爤鑳藉鏀寔涓嶅悓鐨勬暩(sh霉)鎿�(j霉)鍌宠几閫熷害锛屼篃灏辨槸瑾�(shu艒)鍦ㄥ鍏�(n猫i)銆佸澶栧拰琛岃粖(ch膿)鐨勭挵(hu谩n)澧冧腑鑳藉鍒嗗垾鏀寔鑷冲皯2Mbps锛堝厗瀛楃瘈(ji茅)锛忔瘡绉掞級銆�384kbps锛堝崈瀛楃瘈(ji茅)锛忔瘡绉掞級浠ュ強144kbps鐨勫偝杓搁�熷害銆傚湅(gu贸)闅涢浕淇¤伅(li谩n)鐩燂紙ITU锛夊湪2000骞�5鏈堢⒑瀹歐鈥擟DMA銆丆DMA2000鍜孴DS鈥擟DMA涓夊ぇ涓绘祦鐒�(w煤)绶氭帴鍙ｆ(bi膩o)婧�(zh菙n)锛屽(xi臎)鍏�3G鎶�琛�(sh霉)鎸囧皫(d菐o)鎬ф枃浠躲��2000骞村湅(gu贸)闅涚Щ鍕�(d貌ng)閫氳▕瑷�(j矛)鍔冦��銆�

涓湅(gu贸)鐧�(f膩)灞�

銆�銆�3G锛圱he Third-Generation Communication System锛岀涓変唬閫氫俊绯荤当(t菕ng)锛�锛屼竴鍊�(g猫)涓湅(gu贸)鎵嬫(j墨)娑堣不(f猫i)鑰呮棭宸茬垱鐔熺殑鍚嶈銆傚湪浜屽崄涓�涓栫磤(j矛)鐨勬渶鍒濆叐骞达紝3G锛屼唬琛ㄨ憲鑰崇啛鑳借┏锛屼唬琛ㄨ憲鍔冩檪(sh铆)浠ｇ殑閫氳▕绉戞妧闈╁懡锛屼絾鍚屾檪(sh铆)涔熶唬琛ㄨ憲鏈締(l谩i)鐨勯仚涓嶅彲鍙�銆�

銆�銆�寰�2002骞村垵闁�(k膩i)濮�锛屾棩銆侀煋绛夊湅(gu贸)瀹剁礇绱涢爢鍒╁钩婊戝湴瀹屾垚浜嗙敱2.5鍒�3G鐨勯亷(gu貌)娓�锛岃繀閫熼倎鍏ヤ簡3G鏅�(sh铆)浠�锛屽壍(chu脿ng)閫犱簡寰為爳鐧�(f膩)寮甸牷鐜囪瓑鏇�(sh奴)鍒板湪鍏ㄥ湅(gu贸)鑼冨湇鍏�(n猫i)寤虹珛璧疯钃嬬巼閬�(d谩)95%浠ヤ笂鐨勯�氫俊缍�(w菐ng)绲�(lu貌)锛屽儏鑰楁檪(sh铆)杩戝叚鍊�(g猫)鏈堢殑鍦版檪(sh铆)闁撳氨宸茬稉(j墨ng)瀹屾垚浜嗗姝ゅ法澶х殑宸ョ▼銆�

銆�銆�闈㈠皪(du矛)杩戦劙閫欐ǎ杩呴�熺殑杞�(zhu菐n)璁�锛屾垜鍦�(gu贸)鐨勫悇澶ч浕淇￠亱(y霉n)鐕�(y铆ng)鍟嗕篃闁�(k膩i)濮嬭繋渚�(l谩i)涓�鍫�(ch菐ng)鏀归潻銆傚緸鍘熶締(l谩i)姝ヤ紣娌夌┅(w臎n)鐨勫収(n猫i)閮ㄧ恫(w菐ng)绲�(lu貌)娓�(c猫)瑭︺�佹湇鍕�(w霉)瑭﹂粸(di菐n)涔嬮(l猫i)璁婃垚浜嗗緸鍦�(gu贸)澶栬臣(g貌u)缃ō(sh猫)鍌�銆佺敖瑷傛妧琛�(sh霉)鍚堜綔鍚堝悓銆傚埌06骞�9鏈堢偤姝�锛屽湅(gu贸)鍏�(n猫i)浜斿ぇ闆讳俊閬�(y霉n)鐕�(y铆ng)鍟嗕腑锛岄櫎CRC閻甸�氫箣澶�锛屽潎灏�(du矛)澶栧叕甯冧簡妤靛叾瑭崇洝鐨�3G閫氫俊缍�(w菐ng)绲�(lu貌)寤鸿ō(sh猫)瑷�(j矛)鍔冨拰鐩告噳(y墨ng)鐨勬檪(sh铆)闁撹〃锛屼互鍙婄郴绲�(t菕ng)鎵�閲囩敤鐨勭浉闂�(gu膩n)鏍稿績鎶�琛�(sh霉)?锛熸ⅱ鍝塮(shu艒)锛屽悇鍏徃鍦ㄥ皪(du矛)3G鎶�琛�(sh霉)鍙婂叾鎳�(y墨ng)鐢ㄧ殑瀹ｅ偝鏂归潰涓嶉伜浣欏姏銆傜洿鍒扮従(xi脿n)鍦ㄥ凡缍�(j墨ng)鐧�(f膩)灞曟垚涓�鍊�(g猫)鐩稿皪(du矛)瀹屽杽鐨勫钩鑷�(t谩i)銆�

3G鎶�琛�(sh霉)鐨勬(bi膩o)婧�(zh菙n)

銆�

鍦�(gu贸)闅涢浕淇¤伅(li谩n)鐩�(ITU)鏃╁湪2000骞�5鏈堝嵆纰哄畾浜哤-CDMA銆丆DMA2000鍜孴D-SCDMA涓夊��(g猫)涓绘祦3G妯�(bi膩o)婧�(zh菙n)銆�

銆�銆�W-CDMA锛氬嵆Wideband CDMA锛屾剰鐐哄闋诲垎纰煎閲嶅瓨鍙�锛屾槸鐢盙SM缍�(w菐ng)鐧�(f膩)灞曞嚭渚�(l谩i)鐨�3G鎶�琛�(sh霉)瑕�(gu墨)鑼冿紝鍏舵敮鎸佽�呬富瑕佹槸浠SM绯荤当(t菕ng)鐐轰富鐨勬瓙娲插粻鍟�锛屽寘鎷瓙缇庣殑鎰�(脿i)绔嬩俊銆佽鍩轰簽銆佹湕瑷娿�佸寳闆讳互鍙婃棩鏈殑NTT銆佸瘜澹�氥�佸鏅瓑寤犲晢銆傞�欏绯荤当(t菕ng)鑳藉鏋惰ō(sh猫)鍦ㄧ従(xi脿n)鏈夌殑GSM缍�(w菐ng)绲�(lu貌)涓婏紝灏�(du矛)浜庣郴绲�(t菕ng)鎻愪緵鍟嗚�岃█鍙互杓冩柟渚垮湴閬�(gu貌)娓�锛岃�孏SM绯荤当(t菕ng)鐩哥暥(d膩ng)鏅強鐨勪簽娲插皪(du矛)閫欏鏂版妧琛�(sh霉)鐨勬帴鍙楀害鏈�(hu矛)姣旇純楂�銆傚洜姝わ紝W-CDMA鍏锋湁鍏堝ぉ鐨勫競鍫�(ch菐ng)鍎�(y艒u)鍕�(sh矛)銆傜洰鍓峎-CDMA鎵嬫(j墨)宸叉湁澶氱ó鐢�(ch菐n)鍝侀潰涓栵紝浣嗗湅(gu贸)鍏�(n猫i)閭勬矑(m茅i)鏈夊畬鍠勭殑3G缍�(w菐ng)绲�(lu貌)鍙互鎳�(y墨ng)鐢ㄣ��

銆�銆�CDMA2000锛氱敱缇庡湅(gu贸)楂橀�氬寳缇庡叕鍙哥偤涓诲皫(d菐o)鎻愬嚭锛屾懇鎵樼緟鎷夈�佹湕瑷婂拰闊撳湅(gu贸)涓夋槦閮藉凡鍙冭垏锛岄煋鍦�(gu贸)鐝�(xi脿n)鍦ㄦ垚鐐鸿┎妯�(bi膩o)婧�(zh菙n)鐨勪富灏�(d菐o)鑰呫�傞�欏妯�(bi膩o)婧�(zh菙n)鏄緸绐勯牷CDMA2000 1X鏁�(sh霉)瀛楁(bi膩o)婧�(zh菙n)琛嶇敓鍑轰締(l谩i)鐨�锛屽彲浠ュ緸鍘熸湁鐨凜DMA2000 1X绲�(ji茅)妲�(g貌u)鐩存帴鍗囩礆(j铆)鍒癈DMA2000 3X(3G)锛屽缓瑷�(sh猫)鎴愭湰浣庡粔銆備絾鐩墠浣跨敤CDMA鐨勫湴鍗�(q奴)鍙湁鏃�銆侀煋鍜屽寳缇庯紝涓湅(gu贸)鑱�(li谩n)閫氭鏄篃鎳�(y墨ng)鐢ㄤ簡瑭叉ā寮忛亷(gu貌)娓＄殑锛孋DMA2000鐨勬敮鎸佽�呬笉濡俉-CDMA澶氥�備笉閬�(gu貌)CDMA2000鐨勭爺鐧�(f膩)鎶�姹傚嵒鏄洰鍓嶅悇妯�(bi膩o)婧�(zh菙n)涓��(j矛n)搴︽渶蹇殑锛岃ū澶�3G鎵嬫(j墨)涔熷凡鐜囧厛闈笘銆�

銆�銆�TD-SCDMA锛氬叏绋�(ch膿ng)Time Division-Synchronous CDMA锛岃┎妯�(bi膩o)婧�(zh菙n)鏄敱鎴戝湅(gu贸)澶у攼闆讳俊鍏徃鎻愬嚭鐨�3G妯�(bi膩o)婧�(zh菙n)銆傝┎妯�(bi膩o)婧�(zh菙n)灏囨櫤鑳界劇(w煤)绶氥�佸悓姝DMA鍜岃粺浠剁劇(w煤)绶氶浕绛夌暥(d膩ng)浠婂湅(gu贸)闅涙妧琛�(sh霉)铻嶄簬鍏朵腑銆傜敱浜庝腑鍦�(gu贸)鍦�(gu贸)鍏�(n猫i)榫愬ぇ鐨勫競鍫�(ch菐ng)锛岃┎妯�(bi膩o)婧�(zh菙n)鍙楀埌鍚勫ぇ涓昏闆讳俊瑷�(sh猫)鍌欏粻鍟嗙殑閲嶈锛屽叏鐞冧竴鍗婁互涓婄殑瑷�(sh猫)鍌欏粻鍟嗛兘瀹ｅ竷鍙互鏀寔TD-SCDMA妯�(bi膩o)婧�(zh菙n)锛屽皪(du矛)浜庝腑鍦�(gu贸)閫氫俊浜嬫キ(y猫)瀵�(sh铆)鐐轰竴澶ф(j墨)閬囥��

瀹氫綅

銆�銆�绗笁浠ｉ�氫俊缍�(w菐ng)绲�(lu貌)鐨勪富瑕佺洰妯�(bi膩o)瀹氫綅浜庡(sh铆)鏅�(sh铆)瑕栭牷銆侀珮閫熷濯掗珨鍜岀Щ鍕�(d貌ng)Internet瑷晱(w猫n)妤�(y猫)鍕�(w霉)銆傚埄鐢ㄥ厛閫�(j矛n)鐨勭┖涓帴鍙ｆ妧琛�(sh霉)銆佹牳蹇冨寘鍒嗙祫鎶�琛�(sh霉)锛屽啀鍔犱笂灏�(du矛)闋昏瓬鐨勯珮鏁堝埄鐢�锛屾槸鍙互瀵�(sh铆)鐝�(xi脿n)涓婅堪妤�(y猫)鍕�(w霉)鐨勩�傞洊鐒堕珮閫熸暩(sh霉)鎿�(j霉)鍌宠几鑳藉姏鏄涓変唬鐒�(w煤)绶氱恫(w菐ng)绲�(lu貌)鐨勯棞(gu膩n)閸电壒寰佷箣涓�锛屼絾鍏剁湡姝ｅ劒(y艒u)鍕�(sh矛)鏄摯(ku貌)澶ч珮璩�(zh矛)閲忚┍闊虫キ(y猫)鍕�(w霉)瀹归噺銆傜暥(d膩ng)鍓嶇浜屼唬缍�(w菐ng)绲�(lu貌)鎵�鑳芥敮鎸佺殑楂樿唱(zh矛)閲忚┍闊虫キ(y猫)鍕�(w霉)瀹归噺鐨勬嫇灞曢�熷害宸蹭笉鑳芥豢瓒冲鎴跺皪(du矛)鍏堕渶姹傜殑澧為暦(zh菐ng)銆傞珮鏁�(sh霉)鎿�(j霉)瀹归噺鍙娇绉诲嫊(d貌ng)鐢ㄦ埗鑸嘔nternet鏇村姞璨艰繎銆傞櫎浜嗗鍔犱竴瀹氱殑鎶�琛�(sh霉)寰�(f霉)闆滄�у锛屽熀浜嶢TM鎴朓P鎶�琛�(sh霉)鐨勭恫(w菐ng)绲�(lu貌)閫氫俊灏囨渻(hu矛)妤靛ぇ闄嶄綆瑭遍煶銆佹暩(sh霉)鎿�(j霉)妤�(y猫)鍕�(w霉)鐨勬垚鏈�銆�

缍韩(k霉)闆诲瓙閫�锛岄浕瀛愮煡璀�(sh铆)锛屼竴鏌ョ櫨閫�锛�

宸叉敹閷勮姊�162542鍊�(g猫)