A Slot Reuse Scheme for CRMA Networks

In the cyclic reservation multiple access (CRMA) scheme, nodes reserve slots in each reserve command. Cycles are then generated in sequence, each of which services the reservations made in the corresponding reserve command. Huang et al. [2,3] proposed a reservation scheme, in which nodes are partitioned into regions and slots can be reused in succeeding regions, to reduce access delays due to long cycles. However, slots cannot be reused by the nodes in the same region, resulting in the waste of available slots and line utilization. We propose a modified scheme to eliminate this disadvantage. As a result, cycles generated are shorter and access delays are smaller. 6 1997 Elsevier Science B.V.