Challenges to QoS Access Gateway
	q The merging of different QoS model employed on each side of the gateway. q The lack of a policing authority in the ad-hoc domain leads to the need for extra policing on the gateway that may not be scalable. q The difficulty in maintaining accounting and billing records for the mobile nodes due to the lack of a central authority. q The difficulty in obtaining effective service provisioning leaves the gateway with a hard optimization decisions. q Designing scalable architecture.