en the start and stop indexes for exterior UEs. If this pool of resource blocks is depleted, some exterior UEs will not get scheduled within a specific subframe. If resource blocks remain in this pool after exterior UEs have been scheduled, they can be utilized by interior UEs. Using disjoint subsets of resource blocks (defined by the start and stop indexes) in neighboring cells, exterior collisions can be completely avoided. Interior UEs are scheduled on the remaining resource blocks (i.e., after whatever resource blocks are allocated to the exterior UEs). Start index (SI). This scheme is similar to the SSI scheme, but there is no stop index. That is, the scheduler schedules exterior UEs starting from the resource block identified by the start index. Because there is no stop index, all resource blocks in this scheme may be assigned to exterior UEs (although such a situation is unlikely to happen, assuming proper dimensioning and a call admission control mechanism). © 2009 by Taylor & Francis Group, LLC Architecture and Protocol Support for RRM Random start index (RSI). This scheme is similar to the SI scheme, except that the start indexes are defined without cell-wise coordination. This scheme is a fully distributed scheme in the sense that a central intelligence that assigns the start indexes is unnecessary. Start index geometry weight (SIGW). This scheme is similar to SI but uses a continuous measure (which we call the geometry index) to sort the UEs (rather than distinguishing exteriors and interiors). Thereafter, the schedul- ing algorithm is similar to that of the SI scheme, except that now the sched- uler schedules the most exterior UEs first, starting from a preconfigured start index, and proceeds toward the interior UEs. Random index geometry weight (RIGW). This scheme is a combination of the RSI and SI schemes; that is, UEs are sorted in terms of their geometry index ("most exterior" being scheduled first) from a randomly chosen start index. Numerical results for these schemes (Figure 4.13) indicate tha