Huawei and Qualcomm have completed an LTE FDD flash CSFB (Circuit Switched Fallback) voice call to UMTS using R9 protocol and Qualcomm’s latest Snapdragon S4 processor, the MSM8960, during a series of optimization tests.
The companies reported that the tests, based on the flash CSFB voice solution for the R9 protocol, resulted in lower call setup latency than that of the R8 protocol, and very close to that of a native UMTS voice call. During the CSFB testing, which also included LTE TDD calls, good call setup times were seen for both UMTS and GSM.
The joint CSFB testing was part of an ongoing cooperation between Huawei and Qualcomm on interoperability testing and optimization involving GSM/UMTS/LTE TDD/FDD technologies.
Huawei noted that its LTE CSFB solution has been commercially deployed in the Middle East, Asia Pacific, Europe and other regions, allowing users to enjoy fast LTE data services and improved voice services. http://www.huawei.com 02-Aug-12
