14.2.3 UE procedure for determining resource block pool and subframe pool for PSCCH

36.2133GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Physical layer proceduresRelease 17TS

The following procedure is used for sidelink transmission mode 1 and 2.

A PSCCH resource configuration for transmission/reception is associated with a set of periodically occurring time-domain periods (known as PSCCH periods). The i-th PSCCH period begins at subframe with subframe index and ends in subframe with subframe index , where

– ,

– the subframe index is relative to subframe#0 of the radio frame corresponding to SFN 0 of the serving cell or DFN 0 (described in [11]),

– is the offsetIndicator-r12 indicated by the PSCCH resource configuration,

– is the sc-Period-r12 indicated by the PSCCH resource configuration.

For a PSCCH period, the UE determines a PSCCH pool consisting of a subframe pool and a resource block pool as follows.

– For TDD, if the parameter tdd-Config-r12 is indicated by the PSCCH resource configuration, the TDD UL/DL configuration used for determining the subframe pool is given by the parameter tdd-Config-r12, otherwise, the TDD UL/DL configuration used for determining the subframe pool is given by the UL/DL configuration (i.e. parameter subframeAssignment) for the serving cell.

– The first uplink subframes are denoted by arranged in increasing order of subframe index, where is the length of the bitmap subframeBitmap-r12 indicated by the PSCCH resource configuration.

– A subframe () belongs to the subframe pool if, where is the bitmap subframeBitmap-r12 indicated by the PSCCH resource configuration. The subframes in the subframe pool are denoted by arranged in increasing order of subframe index and is the number of subframes in the subframe pool. A PRB with index () belongs to the resource block pool if or if , where S1, S2, and M denote the prb-Start-r12, prb-End-r12 and prb-Num-r12 indicated by the PSCCH resource configuration respectively.

– The resource blocks in the resource block pool are denoted by arranged in increasing order of resource block indices and is the number of resource blocks in the resource block pool.