The application of multihop Wireless Ad Hoc Networks (WANETs) has been facing a great challenge to implement cooperative control over user transmission rates under the resource restrictions. In this paper, we propose an efficient bandwidth allocation scheme called Active-Time-Based Bandwidth Allocation Scheme (ATBAS) that can ensure fair bandwidth allocation among the users in a multihop WANET model. This scheme operates at each hop and fairly allots each competing flow a part of channel time, according to which each hop then computes the updating rate for each flow traversing the hop and reco...