Airtel, India’s Largest Wireless Carrier just a while ago told us that they have tested their 4G LTE network in Pune with Nokia Siemens Networks’ Circuit Switched FallBack (CSFB) voice solution using the underlying GSM Band. With CSFB, the network can transfer customers to GSM platform to make and receive voice calls and access voicemails while retaining the experience of ultra-fast data services on 4G smartphones. CSFB also enables text messaging service (SMS) for LTE subscribers, providing a unified voice and SMS service experience along with LTE data services.
Much ahead of the over hyped Reliance Jio 4G launch, Airtel has managed to prove its superiority as the solution will enable our 4G customers to enjoy high-quality voice services on GSM network and ultra-fast data services on TD-LTE platform – thereby allowing them to have a unified experience on a 4G handset.
How Airtel & NSN have managed to Develop this Technology ?
The solution will enable our 4G customers to enjoy high-quality voice services on GSM network and ultra-fast data services on TD-LTE platform – thereby allowing them to have a unified experience on a 4G handset.
CSFB is a 3GPP compliant functionality that enhances TD-LTE (time division duplex-long term evolution) and FDD-LTE frequency division duplex-long term evolution) deployments with voice capabilities. With CSFB, the end-user device is directed to WCDMA or GSM network for voice calls. The device then remains in the WCDMA/GSM network until the call is completed. Data sessions also continue in the 3G network many times at lower speeds. If dual transfer mode is available in GSM, data session also continues while using the GSM network.