Bharti Airtel, the Indian telecommunications company, will soon launch voice services for its 4G, TD-LTE (time division duplex long term evolution) customers in Pune, India, through its existing GSM network.
The operator has selected Nokia Siemens Networks to deploy its Circuit Switched FallBack (CSFB) voice solution in the operator’s live TD-LTE network in the city. 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.
Jagbir Singh, CTO & Director – Network Services Group, Bharti Airtel, said: ‘Bharti Airtel has the advantage of pan-India GSM and 3G networks and with the deployment of cutting edge CSFB functionality, we will have the flexibility of using either or both the networks to support voice services on our TD-LTE platform. 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.’
Thorsten Robrecht, head of Mobile Broadband portfolio management at Nokia Siemens Networks, said: ‘This achievement of enabling world-first voice call fallback from TD-LTE to GSM in live network is yet another milestone in our efforts to strengthen the commercialisation and deployment of TD-LTE technology globally. Our CSFB assures a successful and reliable mechanism for voice services alongside any LTE data service.’
Nokia Siemens Networks deployed its radio network elements in addition to its voice core and packet core network elements to the commercially launched network of Bharti Airtel in Pune. The company deployed its Single RAN (radio access network) platform based on its award-winning, energy-efficient Flexi Multiradio Base Station.
In addition, the company deployed its Mobile Softswitching (MSS) systems and its Liquid Core-based Evolved Packet Core (EPC) platform, including Flexi NS (Network Server) and Flexi NG (Network Gateway). Nokia Siemens Networks’ network management system NetAct has been implemented to monitor, manage and optimise the whole network.