Abstract:

Within cells of cellular system, the mobility of relay terminals causes the cooperative relay channels instability, brings frequent interruptions to multicast stream. To solve this problem, a layered relay multicast scheme with highcapacity and continuity of multicast service is proposed. Based on a layered abstract model and a nonfading wireless model for satisfying the scheme, the capacity of layered multiple relay channel is studied. Analysis and simulation show that the scheme guarantees the continuity of multicast service when compared with general nonlayered relay networks, though it causes a slight loss on capacity.

Key words: cooperative relay, layered technique, channel capacity, layered multicast