Fault Tolerant Mechanism for Multimedia Flows in Wireless Ad Hoc Networks Based on Fast Switching Paths

Table 1

Fault tolerant messages.

FAULT TOLERANCE MECHANISM
MESSAGE	TYPE	LENGTH	VALUE	DESCRIPTION
WARNING	0x41	13–41 bytes	NODE_ID; MEDIA_INFO	Message to inform the next nodes that a multimedia flow without guaranteed services is going to be sent
ACK WARNING	0x42	13–41 bytes	NODE_ID; MEDIA_INFO	Confirms the warning message when there is a valid route from this point to the destination
REJECT WARNING	0x43	13–41 bytes	NODE_ID; MEDIA_INFO	Reject the warning message when there is not any valid route from this point to the destination
END_FAULT_TRAN	0x44	13–41 bytes	NODE_ID; MEDIA_INFO	Releases resource reservation and notifies the previous hop in the path when a node fails
NODE FAULT	0x45	13–41 bytes	NODE_ID; MEDIA_INFO	Notification of a node failure from the active node to the source node
ACK NODE FAULT	0x46	13–41 bytes	NODE_ID; MEDIA_INFO	Confirm the node failure message sent to the active node