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Quality of service (QoS) of ad hoc network has become a very important research issue in the wireless networks. The ability to adjust the allocated bandwidth of ongoing flows is becoming increasingly significant. In this paper, we describe a fuzzy price-based bandwidth controller for traffic provisioning in ad-hoc network. The transmission rate of source is fuzzily adjusted based on the accumulated price acquired from the network. The control scheme leads to smooth response of the buffer occupancy as well as of the transmission rate. Therefore, better utilization in the wireless ad hoc environment can be achieved.