QUALCOMM demonstrated the full mobility of high-quality, high-capacity VoIP calls across multiple test environments.
The field tests, which involved 62 simultaneous calls, were conducted over CDMA2000 1xEV-DO Rev. A in one sector within a single 1.25 MHz channel — in a fully mobile configuration.
QUALCOMM said the test network demonstrated capacity gains approximately 30 times greater than mobile analog voice and results from a fully loaded commercial network could be somewhat lower.
QUALCOMM used commercial-ready application specific integrated circuits in both handset and prototype networks.
VoIP over EV-DO Rev. A leverages SIP in combination with a number of advanced techniques to achieve quality of service comparable to traditional landline voice. These techniques include QoS capabilities, advanced call-hand-off algorithms, mobile receive diversity and equalization, and enhanced speech-processing algorithms, which improve network capacity and ensure high voice quality.
The full mobility success of these VoIP field tests represent another step toward the convergence of IP and mobile data services with landline wide area IP networks, as QUALCOMM helps bring its customers’ IP Multimedia Subsystem (IMS) strategies to fruition.
QUALCOMM said IMS will enable operators to efficiently merge their wireless and wireline networks, allowing them to realize unsurpassed cost and operational efficiencies over current deployments. http://www.qualcomm.com
