Huawei and Qualcomm Complete LTE Voice Call Testing Based on the 3GPP R9 Protocol

­Huawei, a leading global information and communications technology (ICT) solutions provider, and Qualcomm announced the completion of 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 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.

LTE network is already fulfilling the users’ need for higher speed mobile broadband data services. The introduction of R9 CSFB will further augment users’ experiences and enable high quality voice services on their LTE-based smart phones, through CSFB to GSM and UMTS.