A method of increasing a cell capacity in a mobile communication system is disclosed. According to one embodiment of the invention, the lighting apparatus comprises a plurality of panels; a joint that joins at least two adjacent panels together; and a lighting element disposed on the aquarium lighting apparatus such that the lighting element illuminates a side common to all of the panels. The comparison of average signal strengths can be used to detect cabling faults, and beam errors. This combination of weight and threshold gives a flexible way to control the timing of data replication and hence make the best use of bandwidth. A trench is formed in the metal hard mask layer and the dielectric layer.