Figure 5: MtQS-DSrdv construction exemplary maps ( ) for channels ( ); for stands for a particular map of channel . With three available channels, Channel 1 is selected according to the tQ forward manner, and the next two channels are formed from DSs ( ), that is, : and : . These DSs are exemplary, since others could also be found. While having four available channels, Channel is selected according to the DS rule. Starting with four available channels ( ) the mirror tQ is utilized, changing twice the direction ( ). With five available channels ( ), Channel is built using a backward tQ except of one mirror element.