Same schemes are proposed for dynamic accommodation of the permission probability based on frame reservation multiple access protocol, a variant of PRMA where the base station broadcasts the acknowledgements for all the slots in a frame which occurs at the end of the frame. One is by adjusting the permission probability with regard to the available slats, once in every frame. Another is to set the permission probability individually, based on the contending number of retrials for each active voice terminal. For the integration of voice and data users, to combine the above mentioned schemes, the speech packet dropping probability and mean data delay techniques are superior to the original PRMA with fixed permission probability, as indicated from the simulation results obtained here. (C) 1999 Elsevier Science B.V. All rights reserved.