Loading...
ڵλãֻг
רΪ˫ģֻг
2004-07-27 01:40ͨߣ֣
1˫ģֻֻǽ׶ԵĹɲƷΪгʹ3GʱֻҪӪҵֻȡһʽ˫ģģֻͲΪг

2ԹĿǰʵ˫ģֻγԽļͳɱż

33GʱҲ˫ģֻԭ򣬵ĿǰΪӦ2G3G

4˫ģֻƳ֮٣䱳ҲԤȻԤӰӣԴйгѡĽ

գͨ硱˫ģҵ񼴽Ƴ˫ģֻĻٴγΪ۵Ľ㡣˫ģֻΪͨгһرǰ˫ģֻƶͨгӰжδ3Gʱ˫ģ߶ģûдڵ壿գ߾йػɷϢҵͨоչսо·ɡ

ߣ˫ģֻƳͨгһеΪ˫ģֻǰΣܷгܣ

·ɣΪͬ˫ģֻƳǰؽ⣬Ҫܵ϶صԼʹ˫ģֻֻǽ׶ԵĹɲƷֻһʱһΧûȺʹãΪг

Ŀǰͨ˾ƹ˫ģֻĶĿģϢͨ7·ƳGSMCDMA˫ģֻϣܹʵ1+1>2ĿǰӰͨչCG໥ͻתΪܹγɻľƣƶ˾SIMļݺͱҵCDMA1Xҵijƶ˾ĸ߶˿ͻʹܹΪͨƶû

Ӧ˵ǺõģЧ۲졣ݳͨ˫ģֻۼҪֻͨ15%20%ͨĿǰIJ״ƺ統ƹCDMAʱдģնͻԶͶ˵ͨGûкֻܴDZҵڵĸ߶ûGתCҵЧ治кĹףCչĿǰͨGûӦʣࡣͼԴᾺֵʿͻܻȡһЩչһҪֵܵķƣЧô뻯˫ֻʹǷ㹻ͿɿлCʱܷGȶϵҲҪͨʵӦеļ顣֮ͨ˫ģֻǰʮֹۡ

ߣ˫ģֻз뵥ģֻʲôǷ̺ӪصijɱѶȣѶӣǷζŶԹֻնγż

·ɣݳ˫ģֻļڼǰѳ죬ĿǰѿԽϴģá뵥ģֻȣ˫ģֻӲ϶н϶ĸĽɱȻߣΪֻʵּѿ꣬Ӧ˵ԹĿǰʵ˫ģֻ̫⣬γԽļͳɱż

֪Ĵ˾ȣҵƷЧӦˮƽȾڲ࣬˴ͨơ硱ֻʱѡĦA860ǵSCHW109LGW800Ʒȫ֡ȻͨĿûȺ綨ڸ߶ˣƷЧӦΪصԭ⣬ҲӳֻնҵһľʵȷʵǷȱ

ߣ3Gʱ3GʱҲжֱ׼棬˫ģģնǷй֣

·ɣ3GʱҲ˫ģֻһԭ򣬵ĿǰΪӦ2G3Gһʱʵ2G3G˫ģֻŵǿļGSMWCDMA6650˫ģֻ˫ģֻӦþһгӦÿռ䣬ر3GտʼʱйĿǰгˮƽҵβϴ飬ӵ൱ģ2GӪҵһҪڶʱィɸƵ3G磬ҵʱгٽϴķգԿǷֵεƽ˼2G3Gʽ˫ģֻҪڲͬûȺлһг

2Gȫɵ3G󣬸ΪֻҪʵǿӪҵֻȡһʽݲͬʽWCDMAcdma2000TD-SCDMAȵ˫ģģֻ㲻Ϊг£ģֻĿܻõһӦãٻĿǰΪ㷺1ʽзԵգҸʽľصг2һҵӪʽڣҶģֻ۸뵥ģӪҵҲǿԸƹ㣻3ͬʽӪҵΪԼͶʣòͬҵеԴԴϴɹʶܹǩЭ鸶ʵʩ

ߣ˰˫ģֻйͨгϵĹ̥ΪֶθԤгĽ⣿

·ɣƽ˵Ŀǰ˫ģֻƳ֮٣䱳ҲȷʵԤȻԤӰӡ׷ԴйгѡĽֻΪһгDzȫģĸԤгӰȷܴʹʵϳΪʹ˫ģֻһҪ档

ͨƳ˫ģֻĸCGЭ⡣ȻCĽΪƹʹϵǣǴгΪģʱͨҲģϣܹƾڸ߶ûȺе¢ϣCΪ˵Ͷߵġ¡֮һһЩ⣬Ҫ˫ģֻЭìܣҵľҲȫжΡ

ݳUTPHSGSM˫ģֻȷʵСͨļܴڲԭĿǰӪҵҵ󣬲òԴѰҳ·ʱҲضʷӳԶǶǴĿǰ½ۡʵˣͨ˫ģֻܹʵƽȹɣͶʵĹ˷ѺӪгIJҲǸѡ

֮˫ģֻҲҵӦгʵΪԵһ취ȻδܹﵽЧҲḁ̇̄ҲȫᵽԤгϡ

ĵַ:http://www.cnonline.org/2004/article/4766.html

ӭתء΢罻硣
Ƽ
Loading...