We investigate cache technique from the spatial view and study its impact on the relaying networks. In particular, we consider a dualhop relaying network, where decode-and-forward (DF) relays can assist the data transmission from the source to the destination. In addition to the traditional dual-hop relaying, we also consider the cache from the spatial view, where the source can prestore the data among the memories of the nodes around the destination. For the DF relaying networks without and with cache, we study the system performance by deriving the analytical expressions of outage probability and symbol error rate (SER). We also derive the asymptotic outage probability and SER in the high regime of transmit power, from which we find the system diversity order can be rapidly increased by using cache and the system performance can be significantly improved. Simulation and numerical results are demonstrated to verify the proposed studies and find that the system power resources can be efficiently saved by using cache technique.
Cache-supported cooperative relay networks indicate that the cache can not only exploit the diversity of relays but significantly improve the transmission performance of the system REF .
Cache Aided Decode-and-Forward Relaying Networks: From the Spatial View
Wireless Communications and Mobile Computing
Wireless Communications and Mobile Computing
Computer Science