2016/09 57 p.
The purpose of the present document is to study the radio requirements on V2V services based on LTE sidelink as part of the Rel-14 work item. The normative requirements resulting from the present document will be addressed in the applicable release 14 Technical Specifications (TS).
LTE-based V2X is urgently desired from market requirement as widely deployed LTE-based network provides the
opportunity for the vehicle industry to realize the concept of 'connected cars.' The market for V2V communication in
particular is time sensitive because related activities such as research projects, field test, and regulatory work are alreay
ongoing or expected to start in some countries or regions such as US, Europe, Japan, Korea, and China. In July 2015,
Ministry of Industry and Information Technology (MIIT) of China approved Shanghai Intelligent Connected Vehicle
Pilot Area from Shanghai International Automobile City. In October 2015, Shanghai International Automobile City
released its initial plan to test 1000 LTE-V2X-enabled vehicles in an area of 90 square kilometres in 2018 - 2019.
3GPP is actively conducting study and specification work on LTE-based V2X in order to respond to this situation. A
SA1 work item was approved in in SP-150573 to specify service requirements. SA2 agreed a study item in S2-153532
to identify and evaluate potential architecture enhancements. In RAN#68, a study item on LTE-based V2X Services
was approved in RP-151109. In this study PC5-based V2V has been given highest priority until RAN#70. The
motivation for prioritizing V2V until RAN#70 is to start a V2V work item in December 2015, as proposed in RP151082. This RAN Feasibility Study (FS_LTE_V2X , TR 36.885) has completed the part of PC5 transport for V2V
services. The RAN study concluded that it is feasible to support V2V services based on LTE PC5 interface with
necessary enhancements, and the study also recommended to enhance at least LTE sidelink resource allocation, physical
layer structure, and synchronization. In the meantime, the RAN study is also considering V2V operation scenarios
based on not only LTE PC5 interface but also LTE Uu interface or a combination of Uu and PC5, and the maximum
efficiency of V2V services may be achieved by selecting/switching the operation scenario properly.
Early completion of the corresponding RAN specification for PC5-based V2V and integration with Uu interface will
enable fast preparation for device and network implementation, thereby allowing more chance for LTE-based V2V in
the market. In addition, it can provide the basis for other V2X services, especially V2I/N and V2P services, so that
RAN support for all the V2X services can be completed in time.
full Table of Contents for TR 36.785 Word version: 14.0.0