First TD-SCDMA - GSM Automatic Handover Achieved
Published on: 5th Jun 2007
Note -- this news article is more than a year old.
Beijing T3G Technology (T3G) and NXP Semiconductors have announced what they say is the world's first voice automatic handover of multi mode TD SCDMA and GSM GPRS EDGE in a handset.
The automatic handover feature has been achieved and validated successfully on T3G's TD-SCDMA/GSM/GPRS/EDGE dual mode handset reference design platform in multiple network environments built by all major Chinese infrastructure vendors including Datang Mobile, ZTE and TD-Tech. Seamless automatic handover of voice calls between 3G TD-SCDMA R4 wireless network and 2.5G GSM/GPRS/EDGE mobile networks are supported.
Even while a call is being placed, a TD-SCDMA/GSM phone equipped with the automatic handover feature moving out of TD-SCDMA network coverage will automatically switch the user onto the existing GSM network, without any adverse effects such as call drop. Because the network selection and transition are done by the phone automatically, TD-SCDMA subscribers will not have to make any manual selection of service, and thus will be able to enjoy a true "seamless" multi-mode experience.
This automatic handover is enabled by the Nexperia cellular system solution T3G 7208 GSM/GPRS/EDGE/TD-SCDMA reference design.
Mr. Daijun Zhang, CTO of T3G said, "With the realization of TD-SCDMA and GSM/GPRS/EDGE automatic handover feature thus ensuring great backward compatibility with 2.5G networks, the most challenging technological hurdle facing the TD-SCDMA handsets at the initial commercial stage has been cleared. The addition of the TD-SCDMA/GSM/GPRS/EDGE automatic handover feature to the T3G reference design platform will give our handset maker customers an advantage in creating a rich variety of competitive TD-SCDMA mobile handsets that meet the demands of the China market."
Currently, TD-SCDMA networks are being rolled out in 10 Chinese cities including 6 host cities of Beijing Olympics by China Mobile and other Chinese operators."