A skylight shaft substrate is rendered internally reflected in several ways. The communication method discloses a BS in a wireless communication system that services a first multiple antenna mode using X transmit antennas and a second multiple antenna mode using Y transmit antennas such that, the BS determines an MS to be serviced in the second multiple antenna mode and receives a sounding signal from the MS. A ring antenna is supported relative to the base such that it extends generally perpendicular to a base surface of the base and is positioned forward of the food cavity. The global inputoutput interface receives and provides global memory control signals and also receives and provides write data to and read data from the at least one discrete memory device. As a consequence, the design freedom or layout freedom of the vehicle is expanded. The foreign agent then routes the packets to the destination in the ad hoc network.