AMCCR: Adaptive Multi-QoS Cross-Layer Cooperative Routing in Ad Hoc Networks

Table 2

Comparison of various relay selection schemes.

Protocol	Cooperation decision	Centralization	Selection overhead	Network coding functionality	Number of QoS metrics
CD-MAC	Transmitter	Centralized	Preselect, historical information	No	Single
rDCF	Receiver	Distributed	Preselect, historical information	No	Single
CODE	Transmitter	Centralized	Periodic broadcast	Partial	Single
CoopMAC	Transmitter	Centralized	Passive monitoring	No	Single
UtdMAC	Relay	Centralized	Preselect	No	Single
AMCCR	Relay	Distributed	RTS-CTS contention	Yes	Multiple