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Vodacom Selects Nokia Siemens Networks to Enable Voice & SMS Continuity with CSFB in LTE Network

in News, CSFB, Nokia Siemens Networks, Vodacom, 3G, 4G, GSM, LTE
Liquid Net

South Africa’s telecom service provider, Vodacom has selected Nokia Siemens Networks’ Liquid Core to enable circuit switched fall-back (CSFB) functionality in its LTE network. This functionality allows LTE users to make and receive voice calls using either the GSM or 3G network while retaining the benefit of data services via LTE.

Nokia Siemens Networks has also provided Vodacom with its single radio access network (RAN) solution. The company will also deliver planning, implementation, optimization and support services for the network.

Under the contract, Nokia Siemens Networks has provided Vodacom South Africa with its Liquid Core architecture, based on its mobile soft switch (MSS) with CSFB. Once added to the MSS, the CFSB functionality allows the operator to reuse existing GSM and 3G investments to provide a unified voice and SMS service for people using its LTE service. 

According to Nokia Siemens Networks, company has delivered CSFB to 30 customers across the globe so far.

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CSFB moves data to 3G network

CSFBi does provide data continuity, but not over the LTEi network once a voice call is made. The LTE network will terminate the control and dedicated data bearers and move the connection to the PS domain in a UMTS network via the SGs interface.