Cellular Network Caching Based on Multipoint Multicast Transmissions

Mohsen Amidzadeh, Hanan Al-Tous, Olav Tirkkonen, Giuseppe Caire
2020 GLOBECOM 2020 - 2020 IEEE Global Communications Conference  
We consider an optimal cache-placement-anddelivery-policy using Network-level Orthogonal Multipoint Multicasting (OMPMC) for wireless networks. The placement of files in caches of Base Station (BS) is based on a probabilistic model, with controlled cache placement probabilities. File delivery is based on multipoint multicast and network-based orthogonal transmission; all BSs in the network caching a file transmit it synchronously in dedicated radio resources. If the average signal-to-noise
more » ... associated to a file at a requesting user is less than a threshold, the request is in outage. We derive a closed-form expression for the outage probability for a network modeled as a Poisson Point Process. An optimal caching policy is solved from an optimization problem, and compared to a threshold-based policy, suboptimal partial solutions, and single-point cache delivery. Simulation results show that exploiting OMPMC with optimal cache and bandwidth allocation significantly improves the overall outage probability as compared to single point delivery. Index Terms-Wireless caching, cache placement and delivery policy, multipoint multicast transmission, resource allocation.
doi:10.1109/globecom42002.2020.9348023 fatcat:t3lwzwjkljemtbeotawelyw3zu