Qualcomm and Ericsson Demonstrate SR-VCC Voice Handover from LTE to WCDMA on MSM8960
Highly rated gadgets
- 9.0 Panasonic LUMIX LX100 II
- 9.0 Sony WH-1000XM3
- 8.5 Xiaomi Mi A2
- 10.0 FujiFilm X-T3
- 9.1 Apple iPhone XS Max
- 9.0 FujiFilm XF10
- 10.0 Nikon Z 7
- 9.1 Apple iPhone XS
- 8.0 BlackBerry Motion
Until now, the way voice has worked on handsets with a 4G LTE air interface has been, well, interesting. That is to say, thus far all voice calls haven't been over 4G LTE but conventional circuit-switched (as opposed to packet-switched) 2G or 3G networks like CDMA2000 1x in 3GPP2 land, or WCDMA/GSM in 3GPP land. For example, on Verizon LTE the handset has a second radio always camping 1x for voice and SMS, and on AT&T LTE the handset falls back from LTE to WCDMA for the voice transaction. This is CSFB - Circuit-Switched FallBack. LTE deployments thus far have focused primarily on data connectivity for a variety of reasons, and further logistical hurdles like emergency call support has made V... »read more
More at: AnandTech Add additional source
Filed in: Ericsson