A Survey on Radio Resource Allocation for V2X Communication

Table 3

Comparison of the existing underlaying resource allocation in V2X services.

Ref.	Unicast/broadcast	Objectives	Scenarios	User types	Allocation constraints	Power control/allocation	Allocation process	Methods/theory	RB sharing
[38]	Broadcast	Minimize the delay and reliabilit; Maximize data rate	Dense urban; Intersection	V-UEs (nondelay- and delay-sensitive)	Avg. Que. Leng. PRR	—	Orthogonal RBs are allocated to each user type	Traffic flow theory	1 nondelay-sensitive; 1 delay-sensitive
[39]	Unicast	Minimize network cost	Freewayurban	V-UEs	SINR	—	Nonorthogonal RBs are allocated to V-UEs	Hare–Niemeyer method; Matching theory	N V-UEs
[40]	Unicast	Reduce the signaling overhead and interference	Urban	C-UEs; V-UEs	SINR	—	Orthogonal RBs are allocated to each user type	—	1 C-UE; 1 V-UE
[41]	Unicast	Reduce the signaling overhead and interference	Urban	C-UEs; V-UEs	SINR	PC	Orthogonal RBs are allocated to each user type	Graph theory	1 C-UE; 1 V-UE