ͨͻȻG ҵΪ3G
2006-01-13 06:38籨
3GշǰҹһCDMAΪͶصйͨϡضGӴͶȡ뵽ǰġ3Gơֲͨȴԣ漴֡
ǰϺͨһ߲ڽܼ߲ɷʱ¶ϺͨӴGŻϼԪͶʶ
ͬʱʾͨܲļƻϺйͨݡڵȼ÷ṩGPRSҵ2.75GEDGEҲ
ҵԤ⣬йչ3Gٻᷢ3գWCDMACD-MA2000TD-SCD-MAͨ˫һͬɵͨGGPRSɵWCDMAͨCCDMA-1XɵCDMA2000
⽫ζţͨ;ܹͨɵ3GΪ۷գܷͨһšһӽͨʿۡ
ϺȵG
ΪȫΨһһͬʱӵCGĵӪ̣ͨʼͼͨCDMAIJ컯IJ࣬680Ԫ佨ȫCDMA磬ĿǰCDMA-1Xѿʵ3Gʱֵͨҵ
ȻԱCĴͶ룬ͨGάԵƽСΪֹGδ
ƶҵȣͨGҵֱ֧ȽڹͻȺŲоԺͨо½ŶԼ߱ʾϤ2005ϰ꣬ͨGΪ2.26%
ͬǶȿͨGSM磬ҲͻȣûӪҵ롣ϾͨGSMûҪCDMAûöࡣ20051121ͨ¹ͳ֣ͨûѾﵽ1.25ڣGSMûΪ9319.5CDMAûΪ3217.3Gûռͨûľ֡
Ϻͨйظ߲ճƣͨӪIJԡϺͨGŻѾƻ⽫ʹGSMûܵΪʵķһȣϺGPRSͶá
֮⣬ݡڵȾ÷GSMҲڽ2.5GԽʹҵGPRS
ʵȥ10¾ٰġ2005йͨ豸չᡱϣйͨGPRSֵҵѾȻdz
ݵʱչ̨ʿܣƳͨGPRSҪṩֵҵWAPͨGPRSֻֻͨʵϢͼƬصȹܣJAVAʵӦֻУԵõϷ֡еȸԷȡ
ǰϺͨһ߲ڽܼ߲ɷʱ¶ϺͨӴGŻϼԪͶʶ
ͬʱʾͨܲļƻϺйͨݡڵȼ÷ṩGPRSҵ2.75GEDGEҲ
ҵԤ⣬йչ3Gٻᷢ3գWCDMACD-MA2000TD-SCD-MAͨ˫һͬɵͨGGPRSɵWCDMAͨCCDMA-1XɵCDMA2000
⽫ζţͨ;ܹͨɵ3GΪ۷գܷͨһšһӽͨʿۡ
ϺȵG
ΪȫΨһһͬʱӵCGĵӪ̣ͨʼͼͨCDMAIJ컯IJ࣬680Ԫ佨ȫCDMA磬ĿǰCDMA-1Xѿʵ3Gʱֵͨҵ
ȻԱCĴͶ룬ͨGάԵƽСΪֹGδ
ƶҵȣͨGҵֱ֧ȽڹͻȺŲоԺͨо½ŶԼ߱ʾϤ2005ϰ꣬ͨGΪ2.26%
ͬǶȿͨGSM磬ҲͻȣûӪҵ롣ϾͨGSMûҪCDMAûöࡣ20051121ͨ¹ͳ֣ͨûѾﵽ1.25ڣGSMûΪ9319.5CDMAûΪ3217.3Gûռͨûľ֡
Ϻͨйظ߲ճƣͨӪIJԡϺͨGŻѾƻ⽫ʹGSMûܵΪʵķһȣϺGPRSͶá
֮⣬ݡڵȾ÷GSMҲڽ2.5GԽʹҵGPRS
ʵȥ10¾ٰġ2005йͨ豸չᡱϣйͨGPRSֵҵѾȻdz
ݵʱչ̨ʿܣƳͨGPRSҪṩֵҵWAPͨGPRSֻֻͨʵϢͼƬصȹܣJAVAʵӦֻУԵõϷ֡еȸԷȡ
Ϊ3G¡·
ͨGPRSIJҲڶ롣
ҵձΪ3Gڽ귢ţWCDMACD-MA2000TD-SCDMA3GĿԽϴУйƶѡWCDMA˳3G罨滮й2005꿪ʼ3Gҵƽ̨ҲѽϢƣеŵ齨TDķö
ΨһӵCDMA-1Xйͨ3Gʱӵ켼ơ
ϺͨйʿƣCDMA-1X3GCDMA-2000EVDOҪ3-4¾ͿȫΧȫϣ˽һҪ101ꡣ
ȻѻѴCͨΪͻȻG
ϺͨһڲʿƣȻŲǰʾὫֲͨ𣬵δ֪ͨGġ̰塱ͬʱ3GȽס
ŲоԺͨо½Ҳ˵GܹΪ3GͻȺ3GƷδʵľ£Ϊ3GҵͶҲлر
ʾGGPRSͶʲֻ൱ͬͶʶ20%ңͨļƻҲһͶʣֻdzͶʡⶼԲӦ֮١
ĿǰϺͨΪ3Gҵ
ϺͨйʿԼ߳ƣڣϺͨƳֻ֧ĿǰLGֻɻGPSCDMA-1Xʵ˫صٶȡȶкܴ
⣬CGЭչĻϣͨҲͻ컯ӪǿCݹܡƳ˫ģ˫ֻͨƳԸߡСͶг˫ģ˫ֻʵָİԡ
3GǹͨгûгϴơͨơͬʱԤ⣬ӽ꿪ʼƶֵҵгdzԾֻԾ̶Ȼ3-5ꡣ
ĵַ:http://www.cnonline.org/2006/article/8149.html