Abstract-Relay selection is a simple yet effective means to improve the reliability and coverage of wireless cooperative networks. However, it suffers from inefficient use of the available bandwidth resources. This paper introduces the use of content caching at relays in order to tackle this problem and improve the performance of relay selection. Three cache placement schemes are considered: one based on the most popular files, a uniform based caching and a hybrid scheme of the two. We analytically derive their outage performance as well as their diversity order and coding gain. Numerical results demonstrate the substantial performance gains of these schemes over the traditional optimal relay selection approach without caching capabilities.
Psomas et al. REF focused on caching at relays, and proposed three commonly applied cache placement schemes, namely, most popular files based caching (MPC) to achieve cooperative gain, uniform based caching (UC) to achieve content diversity gain, and a hybrid of the above two schemes.
Cooperative wireless edge caching with relay selection
2017 IEEE International Conference on Communications (ICC)
2017 IEEE International Conference on Communications (ICC)
Computer Science