Reliable Wireless Communication Network Design Considering Customized Multiple-Connectivity

Add/drop functions of light signals in an optical fiber light transmission system are performed using a group of bandpass light filters, wherein each of the group of bandpass light filters is operable to reflect a reflected wavelength band and transmit a transmitted wavelength band. A filter module is positioned to selectively place any of the group of bandpass light filters into a light path of the optical fiber light transmission system. A first add/drop function is accomplished by first positioning a first selected one of the bandpass light filters into the light path using a drive mechanism, directing the input light beam onto the first selected one of the bandpass light filters, performing the first add/drop function on the input light beam relative to a first band light signal in a first wavelength band, and removing the first selected one of the bandpass light filters from the light path using the drive mechanism. A second add/drop function is accomplished by second positioning a second selected one of the bandpass light filters into the light path using the drive mechanism, directing the input light beam onto the second selected one of the bandpass light filters, and performing the second add/drop function on the input light beam relative to a second-band light signal in a second wavelength band.