Tuesday, April 1

Closing The Gap
Clement Teo, 1-Apr-2003


The OMA is determined to bring interoperability of mobile services across markets


The mobile world is closer to seeing interoperable mobile services across markets, operators and mobile terminals, thanks to the efforts of the Open Mobile Alliance (OMA, www.openmobilealliance.org). Formed about a year ago, the OMA aims to grow the entire mobile industry, defining an open standards-based framework to permit applications and services to be built, deployed and managed efficiently and reliably in a multi-vendor environment.

In November last year, the OMA had announced a release programme that consists of seven new enablers for its working groups.

At Cannes, France this year, the OMA has noted that interoperability test fests for Instant Messaging and Presence Services (IMPS) and for Data Synchronising (DS) have been successful. The alliance added two more working groups-M-commerce and mobile gaming-to its current pool.

The M-commerce group was formed to identify the requirements of the M-commerce market, taking into account the needs of the entire value chain including, but not limited to, the global financial payment systems and operators. The group will work closely with the existing forums focused on mobile payment to ensure buy-in from all the players in this market.

The OMA has also established the games services group, which will define interoperability specifications, application programming interfaces, and protocols for network-enabled gaming.

The specifications developed by this group will enable development and deployment of mobile games that can interoperate more efficiently with OMA-compliant platforms and networks.

This will reduce costs for game developers, game platform owners and service providers and stimulate the growth of this new revenue stream for all mobile business stakeholders.

Additionally, th mobile Web services group is progressing with a specification suite that will aid developers in applying Web service technology and standard development tools to discover, access and leverage service enablers within the OMA framework. Developments in this area will provide mobile users with richer applications.

Dr. Situ Wei, general manager of R&D, mobile network business, Siemens China, is also the spokesperson for the OMA in Asia.

He explains that the OMA recently approved some enabler releases, such as the IMPS v.1.1, Client Provisioning v1.1, and Billing Framework v1.0. Other candidate releases were under preparation.

But will these releases and testing be swift enough to keep pace with market changes? Situ believes they are up to the task.

"There is an ongoing 'OMA Work Programme' document, addressed as ?Principles for OMA releases?," says Situ, noting that this ensures that "the releases of OMA are focused on solving inter-operability issues as early as possible".

He points out that enabler releases should correspond to building blocks which can be used to realise services, via work items (WIs).

"Interoperability releases should group together a number of related enabler releases that fulfil the market requirements of one or several WIs on end-to-end level," he adds.

In addition, Situ says that given that a list of WIs has been prioritised by the technical plenary, the work programme needs to include planning the frequency and timing of the bigger interoperability releases, so that the time schedules and scope of the enabler releases can be adapted accordingly.

The releases will be timely for China, for example, as Chinese mobile operators have launched MMS in 2002 and will start location-based service commercial deployment in 2003 over 2G/2.5G networks, says Situ.

"The OMA is working on an inter-operability topic for testing with OMA certification," he says.

However, there are some notable absentees by way of Chinese equipment vendors in OMA.

Says Situ: "Huawei is the top Chinese equipment vendor that joined the OMA as an association member shortly. This will facilitate the overall participations of Chinese equipment vendors to the OMA dramatically. Usually, it takes time for Chinese vendors to become active in an international body."

Situ notes that Huawei, ZTE and DaTang have been active in 3GPP and 3GPP2. He expects that a clear cooperation and task-split framework between OMA and 3GPPs will help the Chinese vendors to leverage the efforts on each.

How big is the Asian representation on OMA?

"At present, China Mobile, Fujitsu, NEC, NTT DoCoMo, Panasonic Mobile, Samsung, SK Telecom and Sony Ericsson are seat-holders on the OMA Board of Directors, among total 43 seats," Situ reveals.

"China Unicom, a very important CDMA operator, is a notable absentee. Obviously, there is a serious lack of OMA officers from Asia. I think the English language is a main stumbling block for Asian participation," he adds.

Tuesday, March 11

Î÷ÃÅ×Ó²¼¾ÖÖйú3G ÁªÊÖÖи´µÏÐÅͨÖØËÜÎïÁ÷ƽ̨


£ £ ¡°ÔÚÒƶ¯Í¨Ñ¶ÁìÓò£¬Æ·ÅÆÈÏÖª¶ÈºÍÆ·ÅÆÐÎÏóÊdzɹ¦µÄÖØÒªÒòËØ¡£¡±Î÷ÃÅ×ÓÒƶ¯ºÍÐÅÏ¢²úÒµ¼¯ÍÅ×ܲÃÀ¼²©µÂ»°Àï»°ÍâÎÞ²»Í¸×ÅÐÛÐÄ£ºÍ¨¹ýÔÞÖú×ãÇòÁªÈü£¬À´ÕæÕý͹ÏÔÎ÷ÃÅ×ÓµÄÆ·ÅƸöÐÔ£¬´Ó¶ø½øÒ»²½¾ò½ðÖйúÊг¡¡£
£ £ 
£ £ ²¼¾Ö3G
£ £ Î÷ÃÅ×Ó»á³öÏÖÔڣԣģ­£Ó£Ã£Ä£Í£ÁºÍ£×£Ã£Ä£Í£ÁÕóÓªÖС£
£ £ 
£ £ Î÷ÃÅ×ÓÊÇ£³£Ç±ê×¼£×£Ã£Ä£Í£ÁµÄÁªÃ˳ÉÔ±£»ÓÖÊÇÖйúÓµÓÐ×ÔÖ÷֪ʶ²úȨµÄ£³£Ç±ê×¼£Ô£Ä£­£Ó£Ã£Ä£Í£ÁµÄΩһһÍâ·½ºÏ×÷Õߣ»»¹ºÍÁíÒ»¸ö£³£Ç±ê×¼£Ã£Ä£Í£Á£²£Ï£Ï£ÏºËÐÄ֪ʶ²úȨµÄÓµÓÐÕßÃÀ¹ú¸ßͨǩÊðÁËʹÓããģͣÁºËÐļ¼ÊõµÄÊÚȨЭÒé¡£ÄÇô£¬Î´À´Î÷ÃÅ×ÓÔÚÖйúµÄ£³£ÇÊг¡µ½µ×°çÑÝʲô½ÇÉ«ÄØ£¿Î÷ÃÅ×Ó¼¯ÍŶ­Ê¡¢Î÷ÃÅ×ÓÒƶ¯ºÍÐÅÏ¢²úÒµ¼¯ÍÅ×ܲÃÀ¼²©µÂ´Ë·¬ÖйúÖ®ÐнҿªÁËÃյס£
£ £ ¡°ÔÚÖйúµÄ£³£ÇÊг¡ÖУ¬Î÷ÃÅ×Ó½«»á³öÏÖÔڣԣģ­£Ó£Ã£Ä£Í£ÁºÍ£×£Ã£Ä£Í£ÁÕóÓªÖС£¡±Ö±ÂʵÄÀ¼²©µÂûÓÐÈÃÕâ¸öÐüÄî¼ÌÐøÏÂÈ¥¡£Ëû±íʾ£¬Î÷ÃÅ×ÓÓµÓÐ×ã¹»µÄʵÁ¦ºÍÈËÁ¦×ÊÔ´À´Ö§³ÖÕâÁ½ÖÖ±ê×¼µÄÑз¢¡£
£ £ ÓÈÆäÊǣԣģ­£Ó£Ã£Ä£Í£Á£¬À¼²©µÂÈÏΪ£¬Öйú×÷ΪÊÀ½çÉÏ×î´óÎÞÏßͨѶÊг¡£¬ÀíÓ¦ÓµÓÐ×Ô¼ºµÄ±ê×¼¡£¡°Î÷ÃÅ×Ó½«Ôڣԣģ­£Ó£Ã£Ä£Í£ÁÑз¢ÉϼÌÐø¸øÓèÈËÁ¦¡¢ÎïÁ¦µÄͶÈë¡£¡±
£ £ È¥Ä꣹Ô£¬Î÷ÃÅ×Ó¶­Ê±£ÀûÔÚÉϺ£¾ÍÔø±íʾ£¬Î÷ÃÅ×ÓÒѾ­¾ö¶¨ÔÙÏò£Ô£Ä£­£Ó£Ã£Ä£Í£Á×·¼Ó£µ£°£°£°ÍòÅ·ÔªµÄͶ×Ê¡£
£ £ ¾ÝÁ˽⣬ÓÉ´óÌƺÍÎ÷ÃÅ×ÓÁªºÏÑз¢µÄ£Ô£Ä£­£Ó£Ã£Ä£Í£ÁÉÌÓÃϵͳĿǰÒѾ­ÔÚËÄ´¨³É¶¼¡¢ÖØÇìµÈµØ½¨ÉèʵÑéÍø¡£
£ £ Î÷ÃÅ×ÓÃ÷È·±íʾ²»½øÈëÁíÒ»ÖÖ£³£Ç±ê×¼£Ã£Ä£Í£Á£²£°£°£°¡£ÔÚÖÕ¶ËÖÆÔìÉÏ£¬Î÷ÃÅ×Ó»¹½«ÒԣǣӣÍÊÖ»úΪÖ÷£¬¶ø¶ÔÓڣãģͣÁÊÖ»úÊг¡£¬Î÷ÃÅ×ÓÒƶ¯Í¨Ñ¶ÑÇÌ«Çø¸±×ܲÃÈÎΰ¹âÃ÷È·±íʾ£¬ÖÁÉÙÏÖÔÚ²»»á½øÈë¡£¡°ÎÒÃǽ«¼¯ÖÐËùÓо«Á¦ºÍ×ÊÔ´¶Ô£Ç£Ó£Í£­£Ç£Ð£Ò£Ó£­£×£Ã£Ä£Í£ÁºÍ£Ô£Ä£­£Ó£Ã£Ä£Í£ÁÕâÁ½ÌõÏßµÄÖÕ¶ËÑз¢¹¤×÷¡£¡±
£ £ ÒµÄÚÈËÊ¿ÈÏΪ£¬ÔÚÖйú£³£ÇÊг¡Ç°¾°²»ÇåÎúµÄÇé¿öÏ£¬Î÷ÃÅ×Ó¶Ô£³£ÇµÄ²¼¾ÖÆÄΪ´ÏÃ÷¡£°´ÕÕÖйúÒƶ¯Ä¿Ç°µÄ·¢Õ¹Ç÷ÊÆ£¬ºÜ¿ÉÄܲÉÓãףãģͣÁ±ê×¼£¬Õâ¾ÍÈ·±£ÁËÎ÷ÃÅ×ÓÔÚδÀ´Öйú£³£ÇÊг¡¿ÉÒÔ·ÖµÃÒ»±­¸þ£»¶ø¶ÔÓڣԣģ­£Ó£Ã£Ä£Í£Á£¬¾¡¹ÜÄ¿Ç°Éв»Çå³þµ½µ×ÊÇÄÄÒ»¼ÒÔËÓªÉÌ»á²ÉÓÃÕâÖÖ±ê×¼£¬µ«Èç¹ûÔËÓªÉÌÒ»µ©²ÉÓã¬ÔÚÍøÂçÉ豸ÌṩÉÏ£¬Î÷ÃÅ×ÓºÍÖз½ºÏ×÷»ï°é´óÌÆ»ù±¾ÉÏûÓоºÕù¶ÔÊÖ£¬¿ÉÒÔ°²ÐÄ·ÖÏíµ°¸â¡£
£ £ ¡°ÎÒÏëÎÒÃÇ»áÔÚδÀ´Öйú£³£ÇÊг¡ÉÏÓгöÉ«µÄ±íÏÖ¡£¡±¶ÔÓÚÎ÷ÃÅ×ÓÔÚÖйú£³£ÇÊг¡µÄ²¼¾Ö£¬À¼²©µÂÏÔµÃÊ®·ÖÓÐÐÅÐÄ¡£
£ £ Öն˸ĸï
£ £ Î÷ÃÅ×ÓÒªÔÚδÀ´µÄÊÖ»úÊг¡ÖÐÕ¼¾Ý¸ü¶àµÄÊг¡·Ý¶î¡£
£ £ 
£ £ ³ýÁ˲¼¾Ö£³£ÇÖ®Í⣬À¼²©µÂ¶ÔÎ÷ÃÅ×ÓÖÕ¶ËÔÚÖйúÊг¡µÄÇ°¾°Ò²ÊǼÄÓèºñÍû¡£
£ £ ¡°ÖйúÊÇÈ«Çò×î´óµÄÊÖ»úÊг¡£¬ÊÖ»úÓû§ÒѾ­Í»ÆÆÁ½ÒÚ¡£¡±³¤ÏàºÍ±±¾©¹ú°²µÄÖ÷˧¿¨Âå˹Óм¸·ÖÏàËƵÄÀ¼²©µÂÏÔȻϣÍûÔÚËûµÄÂÊÁìÏ£¬Î÷ÃÅ×ÓÄܹ»Ïñ¿¨Âå˹Ôø¾­ÂÊÁìµÄÉÂÎ÷¹úÁ¦¶ÓÒ»Ñù£¬ÔÚÇ¿ÊÖÈçÁÖµÄÖйúÊÖ»úÊг¡ÖÐÒì¾üÍ»Æð¡£
£ £ Óë´Ëͬʱ£¬Î÷ÃÅ×Ó£¨Öйú£©¿ªÊ¼Ìø³öÊÖ»ú²úÒµÁ´ÖеÄÖÕ¶ËÖÆÔìÉ̵ĽÇÉ«£¬Ïò²úÒµÁ´ÉÏÏÂÓÎÂõ½ø£¬¿ªÊ¼¶ÔһϵÁÐÓëÖ®Ïà¹ØµÄ×ÊÔ´½øÐÐÕûºÏºÍÖØ×é¡£
£ £ ¶ÔÒƶ¯Öն˾­ÏúÇþµÀµÄ¸Ä¸ïÕýÔÚ½øÐÐÖС£ÈÎΰ¹â˵£¬Î÷ÃÅ×ÓÒѾ­ºÍÊÖ»úÏúÊÛ¾ÞÍ·Öи´µçѶºÍµÏÐÅͨǩ¶©ÁËÊÖ»ú¹©ÏúºÏͬ£¬ÕâÁ½¼ÒÏúÊÛÖն˽«¿ÉÖ±½ÓÏòÎ÷ÃÅ×ÓÄûõ£»¶øÔ­À´µÄһЩ´«Í³ÏúÊÛÇþµÀ£¬½«»á±ä³ÉÒ»¸öÎïÁ÷ƽ̨¡£ÒµÄÚÈËÊ¿ÆÀ¼Û£¬Õ⽫ʹÎ÷ÃÅ×ÓÊÖ»úÔÚ¼Û¸ñÉϸü¾ß¾ºÕùÓÅÊÆ¡£
£ £ ¼ÓÇ¿ºÍÔËÓªÉÌÖ®¼äµÄÅäºÏÊÇÎ÷ÃÅ×ÓµÄÁíÒ»¸ö×ÅÁ¦µã¡£¾ÝÁ˽⣬Î÷ÃÅ×ÓÉèÁ¢ÁËÒ»¸öרÃźÍÔËÓªÉ̽øÐкÏ×÷µÄ²¿ÃÅ£¬Õ⽫»á¼«´óµØ¸Ä±äÒÔÇ°ÐÅÏ¢´«µÝ¹ý»ºµÄÏÖÏó¡£ÈÎΰ¹â˵£¬Ä¿Ç°Î÷ÃÅ×ÓÕýºÍÔËÓªÉ̽øÐлùÓڣʣÁ£Ö£ÁµÄÔöÖµÒµÎñµÄ¿ª·¢¡£
£ £ ´ËÍ⣬Î÷ÃÅ×ÓΧÈÆ×ãÇò¿ª·¢µÄһϵÁлùÓÚÊÖ»úµÄÔöÖµ·þÎñÊ״ζÔÍâÁÁÏà¡£ÈçÇòƱ½»»»¡¢Ìṩ×ãÇòÏà¹ØÐÅÏ¢ºÍ»¥¶¯ÓéÀֵȣ¬ÕâЩºÍÊÖ»ú·ÖÏúÉÌÁªºÏ½øÐеÄÊг¡Íƹã»î¶¯½«°Ñ×ãÇòºÍÒƶ¯Í¨Ñ¶½ôÃܽáºÏÔÚÒ»Æ𡣡°ÒÔ×ãÇòΪÔØÌ壬ÎÒÃÇÏ£Íû°ïÖúÒ»Åú£Ó£ÐѸËÙ¾òµ½ÊôÓÚËûÃǵĵÚһͰ½ð¡£¡±
£ £ ¡°ÎÒÃDz»½öÒªÔÚδÀ´Êг¡ÉÏÓµÓиü¶à·Ý¶î£¬»¹Òª½«¹ýÈ¥Ô­±¾ÊôÓÚÎÒÃǵÄÄûØÀ´¡£¡±Î÷ÃÅ×ÓÒƶ¯Í¨Ñ¶ÑÇÌ«Çø¸±×ܲÃÈÎΰ¹âÒâζÉµØ˵µÀ¡£

Tuesday, March 4

´óÌÆTD-SCDMA²úÒµÔ°Â仧ÉϺ£ Äêµ×³öÉÌÓÃÉ豸

¡¡¡¡±¾±¨Ñ¶(¼ÇÕßñÒÄþ) Ã÷Äê³õ£¬Ä㽫¿ÉÄÜÄÃ×ÅÉϺ£ÖÆÔì¼æÈÝGSMÍøµÄCDMAÊÖ»ú´òµç»°ÁË¡£×òÌ죬´óÌÆÒƶ¯ºÍÇàÆÖÇø¾ÙÐкÏ×÷Ç©Ô¼ÒÇʽ£¬Ðû¸æTD¡ªSCDMA²úÒµÔ°ÇøÂ仧ÇàÆÖ¹¤ÒµÔ°Çø¡£×¨¼Ò³Æ´Ë¾ÙÊÇÉϺ£¡°ÊµÊ©¿Æ½ÌÐËÊÐÕ½ÂÔ£¬×ßͨ»ªÉ½ÌìÏÕÒ»Ìõ·¡±µÄÓÖһʵÖÊÐԾٴ룬ͬʱҲ±êÖ¾×ű¸ÊܹØ×¢µÄTD¡ªSCDMA±ê×¼µÄ²úÒµ»¯²¼¾Ö¼Ó¿ì¡£

¡¡¡¡TD¡ªSCDMA¼æÈÝGSMÍøÂ磬½«ÎªÎÒ¹úÒƶ¯Í¨ÐŲúҵʵÏÖ¿çԽʽ·¢Õ¹Ìṩǿ´ó¼¼ÊõÍƶ¯Á¦
£¬¶ø²úÒµÔ°ÇøÂ仧ÉϺ££¬½«¸Ä±äÉϺ£Í¨ÐÅÒµÖÆÔìÄÜÁ¦ÖØÓÚ×ÔÖ÷´´ÐÂÄÜÁ¦µÄ¾ÖÃ棬ÌáÉýÉϺ£ÐÅÏ¢²úÒµÄܼ¶£¬²¢À­¶¯¼¯³Éµç·¡¢Èí¼þ¡¢Öնˡ¢ÒÇÆ÷ÒDZíµÈ²úҵȫÃæ·¢Õ¹¡£

¡¡¡¡¸ù¾Ý¹æ»®£¬´óÌÆÒƶ¯½«ÔÚÇàÆÖ¹¤ÒµÔ°Çø½¨ÉèÒ»¸ö»ùÓÚÑз¢¡¢ÖÆÔì(×Ü×°)¡¢ÑéÖ¤²âÊÔ¡¢¹¤³ÌÖ§Ô®¡¢Åàѵ¡¢¿Í»§·þÎñÔÚÄÚµÄÍêÕûÒâÒåÉϲúÆ·ÖÆÔìÌåϵµÄ²úÒµÔ°Çø£¬Í¨¹ý¶ÔÈËÔ±¡¢ÐÅÏ¢¡¢ÎïÁ÷µÄÈ«ÐÂÕûºÏºÍÓÅ»¯ÅäÖã¬Ìá¸ßÉú²ú¡¢¹ÜÀí¡¢×ÊÔ´µÄÀûÓÃЧÂÊ£¬¼ÓËÙTD¡ªSCDMAÉú²ú¼¼ÊõµÄÌá¸ß¼°¼¼Êõת»¯½ø³Ì£¬ÊµÏÖTD¡ªSCDMA²úÒµ×ÊÔ´µÄÓÅ»¯ÅäÖá£

¡¡¡¡¸±Êг¤ÑîÐ۵ȳöϯÁËÇ©Ô¼ÒÇʽ¡£

¡¡¡¡Ð¡×ÊÁÏTD¡ªSCDMA

¡¡¡¡¡°Ê±·Öͬ²½Âë·Ö¶àÖ·¼¼Êõ¡±µÄ¼ò³Æ£¬ÊÇÓÉ´óÌƼ¯ÍÅ´ú±íÖйúÕþ¸®Ìá½»¡¢±»¹ú¼ÊµçÁª( ITU )ºÍµÚÈý´úÒƶ¯Í¨ÐÅ»ï°éÏîÄ¿(3 GPP )½ÓÄɵÄÊÀ½çÈý´ó¡°µÚÈý´úÒƶ¯Í¨Ðż¼Êõ±ê×¼¡±Ö®Ò»¡£ÓÉÖйú×Ô¼ºÌá³ö²¢±»È·Á¢Îª¹ú¼Ê±ê×¼£¬ÕâÔÚÖйú°ÙÄêµçÐÅÊ·ÉÏÉÐÊôÊ״Ρ£ÕâÏî¼¼Êõ³É±¾ÏÔÖøµÍÓÚÆäËû3G¼¼Êõ£¬²¢¾ßÓиü¸ßµÄƵÆ×ÀûÓÃÂÊ£¬ÇÒ¼æÈÝÓÚGSMÍø£¬ÔÚÎÞÐ谲װлù´¡ÉèÊ©µÄÇé¿öÏ£¬¼´¿ÉÌṩ3G·þÎñ¡£


Wednesday, February 26

¸ßͨºÍÖйúÁªÍ¨½¨Á¢ºÏ×ÊÆóÒµ

CDMA¼¼ÊõµÄ¿ª·¢Õ߸ßͨ¹«Ë¾(Qualcomm Inc., QCOM)½«½øÒ»²½À©Õ¹Óë¸ÃϵͳÔÚÖйúµÄÖ÷ÒªÖ§³ÖÕßÖйúÁªÍ¨µÄºÏ×÷¡£

Ïã¸ÛºÍŦԼÉÏÊеÄÖйúÁªÍ¨¹É·ÝÓÐÏÞ¹«Ë¾(China Unicom Ltd.,CHU)µÄĸ¹«Ë¾£¬ÖйúÁªºÏͨÐŹɷÝÓÐÏÞ¹«Ë¾(China United Telecommunications Co. Ltd., Q.CUQ, ¼ò³Æ£ºÖйúÁªÍ¨)È¥ÄêÔÚÖйúÈ«¹ú·¶Î§ÄÚÍƳöCDMAÒƶ¯µç»°ÍøÂ磬²¢ÊµÏÖÁËÇ©Ô¼700ÍòÓû§µÄÄ¿±ê¡£

¸ßͨ¹«Ë¾ºÍÖйúÁªÍ¨ÖÜÈýÐû²¼½¨Á¢Ò»¼ÒºÏ×ʹ«Ë¾£¬´ÓÊ¿ª·¢CDMAÒƶ¯µç»°Óû§Ê¹ÓõÄÐÂÐÍÓ¦ÓÃÈí¼þ£¬ËûÃÇÏ£ÍûÄܹ»½å´ËÈÃÖйúÁªÍ¨µÄCDMA·þÎñÎüÒýÔ½À´Ô½¶àµÄÏû·ÑÕß¡£

Á½¼Ò¹«Ë¾Ã»ÓÐÔÚÉùÃ÷ÖÐ͸¶ºÏ×ʹ«Ë¾µÄ²ÆÎñϸ½Ú£¬µ«±íʾËûÃǽ«Æ½·ÖºÏ×ʹ«Ë¾ËùÓÐȨ£¬³õ²½Í¶×ʶîΪÉÏǧÍòÈËÃñ±Ò£¨1ÃÀÔª£½ÈËÃñ±Ò8.28Ôª£©¡£

¸ßͨ¹«Ë¾·¢ÑÔÈ˳ƣ¬¸Ã¹«Ë¾Ô¤¼ÆÖйú½ñÄ꽫ÓÐCDMAÐÂÔöÓû§1,300ÍòÈË£¬Ó¡¶ÈÐÂÔöÓû§½«ÓÐ700ÍòÈË¡£¸Ã·¢ÑÔÈË»¹±íʾ£¬¸Ã¹«Ë¾Ô¤¼Æ2003ÄêCDMAµç»°µÄÈ«ÇòÏúÊÛÁ¿½«´ï1.08ÒÚÖÁ1.1ÒÚ²¿¡£

³öÊÛCDMAµç»°¾§Æ¬¼°CDMAÉ豸µÄרÀûȨÊǸßͨ¹«Ë¾µÄÊÕÈëÀ´Ô´¡£

¸ßͨ¹«Ë¾ÉÏÖÜÐû²¼£¬ÖйúÁªÍ¨¿ªÊ¼ÔÚ½­ËÕÊ¡ËÕÖݽøÐÐGSM 1X¼¼ÊõÊÔÑé¡£ÕâÏî¼¼Êõ½«Ê¹»ùÓÚGSMµÄÊÖ»úÍøÂçÉý¼¶Îª¸ßËÙµÄCDMA 1X¡£GSMÊÇÔÚÑÇÖÞºÍÅ·ÖÞÓ¦ÓõÃ×î¹ã·ºµÄÊÖ»ú¼¼Êõ¡£

ÖйúÁªÍ¨Ö´Ðж­ÊÂÍõ½¨Öæ(Wang Jianzhou)ÔÚÉùÃ÷Öгƣ¬²âÊÔ×îÖÕÄ¿µÄÊÇÍƳöͬʱÔËÐÐÓÚGSMºÍCDMAÍøÂçµÄÒƶ¯µç»°¡£ÖйúÁªÍ¨Ò²ÊÇGSMÍøÂçÔÚÖйúµÄ³ÐÔËÉÌ£¬ÓµÓÐ5,000¶àÍòÓû§¡£

Tuesday, February 25

ŵ»ùÑÇһ˵µ½ÏúÊÛÁ¿£¬°®Á¢ÐžͿÞÁË
°®Á¢ÐÅһ˵µ½ÖÐÎÄÊäÈ룬ĦÍÐÂÞÀ­¾Í¿ÞÁË
ĦÍÐÂÞÀ­Ò»Ëµµ½ÐͺŶ࣬Î÷ÃÅ×ӾͿÞÁË
Î÷ÃÅ×Óһ˵µ½DIY£¬ÈýÐǾͿÞÁË
ÈýÐÇһ˵µ½Íâ¹Û¹¤ÒÕ£¬°¢¶û¿¨ÌؾͿÞÁË
°¢¶û¿¨ÌØһ˵µ½²Ù×÷½çÃ棬·ÉÀûÆվͿÞÁË
·ÉÀûÆÕһ˵µ½´ý»úʱ¼ä£¬ËùÓеÄÊÖ»ú¶¼¿ÞÁË
TCLһ˵µ½·µÐÞÂÊ£¬ËùÓеÄÊÖ»ú¶¼Ð¦ÁË
¹ú²úÊÖ»úһ˵µ½Ä£·ÂÄÜÁ¦£¬ËùÓеĽø¿ÚÊÖ»ú¶¼²»¿ÔÉùÁË......