Nokia Siemens Networks announced a unique Dynamic Frequency and Channel Allocation (DFCA) feature that that it claims will double GSM network capacity within existing spectrum. 
Nokia Siemens Networks’ DFCA leverages a combination of software capabilities to increase the traffic carrying capacity of existing sites, while improving network quality. This, in turn, minimizes the immediate investment in additional sites, reducing the total cost of ownership. An added benefit is a huge increase in energy efficiency per subscriber.
“DFCA has immense potential to help operators address the challenge of ever increasing voice and data traffic,” said Prashant Agnihotri, head of GSM/EDGE product management, Nokia Siemens Networks. “It helps operators squeeze voice calls into less bandwidth, so it can be alternatively used for data, either through Enhanced Data Rates for GSM Evolution (EDGE) or by re-farming the spectrum to Wideband Code Division Multiple Access/Long Term Evolution (WCDMA/LTE). It brings a substantial increase for operators in terms of potential earnings per base station site.”http://www.nsn.com
- In January 2009, Nokia Siemens Networks announced the successful implementation of Orthogonal Sub Channel (OSC) technology to carry four calls in one GSM radio timeslot. This effectively doubles the voice capacity of the GSM radio network. The OSC demonstration was conducted as a drive test using four handsets sharing only one radio timeslot and without compromising the call quality. The demonstration, which was held on January 21, used existing commercially available GSM handsets.
Nokia Siemens Networks said the OSC demonstration was the first of its kind The company is actively contributing to the standardization of OSC and is planning to have the technology commercially available in 2010.