Performance Analysis and Power Allocation of Multi-Hop Multi-Branch Relays with Data Storage over Generalized Fading Channels

Deployment of relays with data storage capability is progressively becoming popular in the literature as it provides significant performance improvement over relays with non-storage capability. In this paper, we consider a multi-branch multi-hop decode-and-forward (DF) relay system. We assume each relay has data storage and the data can be stored temporarily if the next channel is not good enough to transmit through. We derive an asymptotic and approximate outage probability expression for the considered system under generalized fading channel. Based on the derived expression, we formulate an optimization problem which allocates source and relay transmit powers under different system requirements.