What is the main purpose of enhancements to LTE operation in unlicensed spectrum?
To enable tracking of data volume for traffic on unlicensed spectrum
To integrate WLAN technologies for ProSe Direct Discovery
To provide end-to-end QoS differentiation for voice services
To enable more efficient use of UL resources on unlicensed spectrum
To support VoIMS via Trusted and Untrusted WLAN access