Abstract: A mobile communication system is constructed including a plurality of cluster heads, cluster members, a topology management device, and a location management device. Each cluster head exchanges routing information with only each cluster member in a cluster to which the terminal itself (host terminal) belongs, and with only a cluster head in another cluster adjacent to the cluster to which the host terminal belongs. Each cluster member exchanges routing information with only a cluster head in a cluster to which the host terminal belongs. The topology management device and location management device receive the routing information from each cluster head only.

Abstract: A sliding module comprises a sliding member having a transversal plate disposed transversally and coupled vertically at a substantially middle position of two sliding plates, and the transversal plate includes a rectangular transversal groove, and the transversal groove includes a through hole disposed at an external side of the transversal groove; a spindle member being a rectangular spindle plate and includes a spindle hole disposed separately on both sides of the spindle member, and a spindle bolt passes through one of said spindle holes and is coupled to the transversal groove; a tension spring with both ends separately including a spring hook and one of the spring hooks is latched into the through hole, and another spring hook is latched into a bolt aperture of a spindle bolt above the transversal groove; and a slid member being a driven plate with both lateral sides bent into a sliding groove for embedding an external side of the sliding plate, and the driven plate includes a plate aperture for passing