רΪ˫ģֻг
2004-07-27 01:40ͨ
1˫ģֻֻǽԵĹɲƷΪгʹ3GʱֻҪӪҵֻȡһʽ˫ģģֻͲΪг
2ԹĿǰʵ˫ģֻγԽļͳɱż
33GʱҲ˫ģֻԭĿǰΪӦ2G3G
4˫ģֻƳ֮٣䱳ҲԤȻԤӰӣԴйгѡĽ
գͨ硱˫ģҵƳ˫ģֻĻٴγΪ۵Ľ㡣˫ģֻΪͨгһرǰ˫ģֻƶͨгӰжδ3Gʱ˫ģ߶ģûдڵ壿գ߾йػɷϢҵͨоչսо·ɡ
ߣ˫ģֻƳͨгһеΪ˫ģֻǰΣܷгܣ
·ɣΪͬ˫ģֻƳǰؽ⣬Ҫܵ϶صԼʹ˫ģֻֻǽԵĹɲƷֻһʱһΧûȺʹãΪг
Ŀǰͨ˾ƹ˫ģֻĶĿģϢͨ7·ƳGSMCDMA˫ģֻϣܹʵ1+1>2ĿǰӰͨչCGͻתΪܹγɻľƣƶ˾SIMļݺͱҵCDMA1Xҵijƶ˾ĸ߶˿ͻʹܹΪͨƶû
Ӧ˵ǺõģЧ۲졣ݳͨ˫ģֻۼҪֻͨ15%20%ͨĿǰIJ״ƺ統ƹCDMAʱдģնͻԶͶ˵ͨGûкֻܴDZҵڵĸ߶ûGתCҵЧ治кĹףCչĿǰͨGûӦʣࡣͼԴᾺֵʿͻܻȡһЩչһҪֵܵķƣЧô뻯˫ֻʹǷ㹻ͿɿлCʱܷGȶϵҲҪͨʵӦеļ顣֮ͨ˫ģֻǰʮֹۡ
ߣ˫ģֻз뵥ģֻʲôǷ̺ӪصijɱѶȣѶӣǷζŶԹֻնγż
·ɣݳ˫ģֻļڼǰѳ죬ĿǰѿԽϴģá뵥ģֻȣ˫ģֻӲ϶н϶ĸĽɱȻߣΪֻʵּѿ꣬Ӧ˵ԹĿǰʵ˫ģֻ̫⣬γԽļͳɱż
֪Ĵ˾ȣҵƷЧӦˮƽȾڲ࣬˴ͨơ硱ֻʱѡĦA860ǵSCHW109LGW800Ʒȫ֡ȻͨĿûȺ綨ڸ߶ˣƷЧӦΪصԭ⣬ҲӳֻնҵһľʵȷʵǷȱ
ߣ3Gʱ3GʱҲжֱ棬˫ģģնǷй֣
·ɣ3GʱҲ˫ģֻһԭĿǰΪӦ2G3Gһʱʵ2G3G˫ģֻŵǿļGSMWCDMA6650˫ģֻ˫ģֻӦþһгӦÿռ䣬ر3GտʼʱйĿǰгˮƽҵβϴ飬ӵ൱ģ2GӪҵһҪڶʱィɸƵ3G磬ҵʱгٽϴķգԿǷֵεƽ˼2G3Gʽ˫ģֻҪڲͬûȺлһг
2ԹĿǰʵ˫ģֻγԽļͳɱż
33GʱҲ˫ģֻԭĿǰΪӦ2G3G
4˫ģֻƳ֮٣䱳ҲԤȻԤӰӣԴйгѡĽ
գͨ硱˫ģҵƳ˫ģֻĻٴγΪ۵Ľ㡣˫ģֻΪͨгһرǰ˫ģֻƶͨгӰжδ3Gʱ˫ģ߶ģûдڵ壿գ߾йػɷϢҵͨоչսо·ɡ
ߣ˫ģֻƳͨгһеΪ˫ģֻǰΣܷгܣ
·ɣΪͬ˫ģֻƳǰؽ⣬Ҫܵ϶صԼʹ˫ģֻֻǽԵĹɲƷֻһʱһΧûȺʹãΪг
Ŀǰͨ˾ƹ˫ģֻĶĿģϢͨ7·ƳGSMCDMA˫ģֻϣܹʵ1+1>2ĿǰӰͨչCGͻתΪܹγɻľƣƶ˾SIMļݺͱҵCDMA1Xҵijƶ˾ĸ߶˿ͻʹܹΪͨƶû
Ӧ˵ǺõģЧ۲졣ݳͨ˫ģֻۼҪֻͨ15%20%ͨĿǰIJ״ƺ統ƹCDMAʱдģնͻԶͶ˵ͨGûкֻܴDZҵڵĸ߶ûGתCҵЧ治кĹףCչĿǰͨGûӦʣࡣͼԴᾺֵʿͻܻȡһЩչһҪֵܵķƣЧô뻯˫ֻʹǷ㹻ͿɿлCʱܷGȶϵҲҪͨʵӦеļ顣֮ͨ˫ģֻǰʮֹۡ
ߣ˫ģֻз뵥ģֻʲôǷ̺ӪصijɱѶȣѶӣǷζŶԹֻնγż
·ɣݳ˫ģֻļڼǰѳ죬ĿǰѿԽϴģá뵥ģֻȣ˫ģֻӲ϶н϶ĸĽɱȻߣΪֻʵּѿ꣬Ӧ˵ԹĿǰʵ˫ģֻ̫⣬γԽļͳɱż
֪Ĵ˾ȣҵƷЧӦˮƽȾڲ࣬˴ͨơ硱ֻʱѡĦA860ǵSCHW109LGW800Ʒȫ֡ȻͨĿûȺ綨ڸ߶ˣƷЧӦΪصԭ⣬ҲӳֻնҵһľʵȷʵǷȱ
ߣ3Gʱ3GʱҲжֱ棬˫ģģնǷй֣
·ɣ3GʱҲ˫ģֻһԭĿǰΪӦ2G3Gһʱʵ2G3G˫ģֻŵǿļGSMWCDMA6650˫ģֻ˫ģֻӦþһгӦÿռ䣬ر3GտʼʱйĿǰгˮƽҵβϴ飬ӵ൱ģ2GӪҵһҪڶʱィɸƵ3G磬ҵʱгٽϴķգԿǷֵεƽ˼2G3Gʽ˫ģֻҪڲͬûȺлһг
2Gȫɵ3GΪֻҪʵǿӪҵֻȡһʽݲͬʽWCDMAcdma2000TD-SCDMAȵ˫ģģֻ㲻Ϊг£ģֻĿܻõһӦãٻĿǰΪ㷺1ʽзԵգҸʽľصг2һҵӪʽڣҶģֻ۸뵥ģӪҵҲǿԸƹ㣻3ͬʽӪҵΪԼͶʣòͬҵеԴԴϴɹʶܹǩЭ鸶ʵʩ
ߣ˰˫ģֻйͨгϵĹ̥ΪֶθԤгĽ⣿
·ɣƽ˵Ŀǰ˫ģֻƳ֮٣䱳ҲȷʵԤȻԤӰӡԴйгѡĽֻΪһгDzȫģĸԤгӰȷܴʹʵϳΪʹ˫ģֻһҪ档
ͨƳ˫ģֻĸCGЭ⡣ȻCĽΪƹʹϵǣǴгΪģʱͨҲģϣܹƾڸ߶ûȺе¢ϣCΪ˵Ͷߵġ¡֮һһЩ⣬Ҫ˫ģֻЭìܣҵľҲȫжΡ
ݳUTPHSGSM˫ģֻȷʵСͨļܴڲԭĿǰӪҵҵòԴѰҳ·ʱҲضʷӳԶǶǴĿǰ½ۡʵˣͨ˫ģֻܹʵƽȹɣͶʵĹ˷ѺӪгIJҲǸѡ
֮˫ģֻҲҵӦгʵΪԵһ취ȻδܹﵽЧҲḁ̇̄ҲȫᵽԤгϡ
ĵַ:http://www.cnonline.org/2004/article/4766.html