Ericsson Claims First LTE-TDD to CSFB Call
Ericsson today said that it has demonstrated the first call using LTE-TDD to circuit switched fall back (CSFB) technology in public. The call was made with Ericsson networking gear and a device using a multi-mode LTE chipset from Qualcomm. CSFB is one solution that may be used by wireless network operators to transition phone calls from LTE networks to GSM networks. CSFB allows both LTE and 3G network connections to be supported on a single chip, which lets handset makers design smaller, less expensive, more power-efficient phones that can make voice calls over LTE networks, and then switch to GSM-based networks when LTE coverage is not available. Earlier this year, Ericsson and Qualcomm used Single Radio Voice Call Continuity (SRVCC) to achieve the same effect for VoLTE-to-WCDMA handoffs. Today's announcement expands the handoff scenario from standard LTE to LTE-TDD, which is an updated version of LTE.
HTC One A9: First Phone To Work on Verizon Without CDMA
HTC will sell an unlocked version of its new One A9 that can be used on Verizon's LTE network, even though the phone lacks the legacy CDMA technology found in all other Verizon phones to date. That makes the One A9 the first phone announced for use with Verizon in LTE-only mode.
T-Mobile Debuts VoLTE in Seattle
T-Mobile today announced that it has launched VoLTE service in its home market of Seattle. T-Mobile claims that VoLTE service offers both voice and data in the same radio layer and offers call set-up times that are twice as quick.
Qualcomm's Next Target Is Unlicensed LTE Over 5GHz
Qualcomm today announced its initial foray with LTE into the unlicensed 5GHz band, spectrum that is normally reserved for WiFi networks. Qualcomm believes LTE-U, or LTE in unlicensed spectrum, could help carriers fill in blank spots with small cells.
Verizon to Bring VoLTE to Prepaid Later this Year
Verizon Wireless plans to give its prepaid subscribers access to VoLTE services, including HD Voice and video calls in the near future. Prepaid customers will need to add HD Voice to their account before they can make HD calls, but the add-on will be free.