  In this paper, we propose a resource allocation algorithm for V2X
communications based on Sparse Code Multiple Access(SCMA). By analyzing the
interference model in the V2X scenario, we formulate the problem which deals
with resource allocation to maximize the system throughput. A graph color-based
user cluster algorithm combined with resource allocation algorithm based on
both result of clustering and SINR is presented to solve the problem. The
simulation results indicate that the throughput performance of system based on
SCMA is superior to which based on OFDMA, and the proposed algorithm can
improve the system throughput and the number of access users.
