ection. For example, aiming for short latency would require shorter TTI and shorter eNodeB and UE decoding times for the received TTI. Wider LTE bandwidth to address band allocations with more than 20 MHz of continuous spectrum for an operator. This may be alternatively covered by 5G. Use of LTE for communications from/towards vehicles (V2X), as has been addressed in 3GPP with requirements study on-going before actual radio standardizations studies start. Respectively, the device-to-device (D2D) solution, introduced in Release 12 as covered in Chapter 3, as being extended further in Release 13, may be enhanced to cover the vehicle- to-vehicle (V2V) use case also, as is currently being investigated with a specific V2X study item. Improvements in mobility, as there is going to be increased signalling with larger number of carriers and use of dual connectivity unless some enhancements are introduced. The proposed approaches include autonomous selection of the SCell by the UE to reduce handover signalling. Work for further narrowband LTE solution for M2M or Narrowband Internet of Things (NB- IoT). There has been interest raised for very low cost and narrow bandwidth solution, fitting basically to a single 200 kHz GSM carrier, aiming for cases with low data rate transmission needs. 3GPP is addressing this aspect still for Release 13 in addition to the on-going GSM and LTE M2M work, with the work expected to be finalized potentially slightly later than other Release 13 items around mid 2016. RAN WG1 led RAN WG2 led RAN WG3 led RAN WG4 led LAA (LTE-U) WI Enhanced LTE D2D WI SON for AAS-based UE core requirements deployments WI for uplink 64 QAM WI CA up to 32 CCs WI Support of single-cell point-to-multipoint WI RAN Aspects of RAN CA Band WIs (2DL, Sharing Enh. WI 2UL, 3DL, 4DL CA WIs) Low cost MTC enh. WI LTE-WLAN Integration & Interworking Enh. WI Fe small cell higher UE MIMO OTA WI 3D beamforming/FD- layer aspects SI MIMO WI Further Enh. of MDT WI LTE DL 4 Rx antenna Extension of Dual ports SI Downlink Multiuser Multi