A network of handling a sEPDCCH transmission comprises instructions of determining a duration of a sTTI; determining the number of a plurality of available REs of a plurality of REs in a sSU, nEPDCCH; determining an AL of the sSU, Q; determining the number of a plurality of ECCEs in an aggregated sSU, K; determining the number of a plurality of EREGs in an ECCE, A; numbering a plurality of available REs in the aggregated sSU from 0 to (A*K−1) cyclically; arranging the plurality of EREGs numbered with 0 to (A*K−1) according to a K by A matrix; determining the number of a plurality of aggregated sSUs for performing the sEPDCCH transmission, N; determining the number of a plurality of ECCEs in N aggregated sSUs, N*K; and determining a sEPDCCH position on N*K consecutive ECCEs.