Asymptotic Scaling Laws of Wireless Adhoc Network with Physical Layer Caching
arXiv:1510.05205
Abstract
We propose a physical layer (PHY) caching scheme for wireless adhoc networks. The PHY caching exploits cache-assisted multihop gain and cache-induced dual-layer CoMP gain, which substantially improves the throughput of wireless adhoc networks. In particular, the PHY caching scheme contains a novel PHY transmission mode called the cache-induced dual-layer CoMP which can support homogeneous opportunistic CoMP in the wireless adhoc network. Compared with traditional per-node throughput scaling results of Θ\left(1/\sqrt{N}\right), we can achieve O(1) per node throughput for a cached wireless adhoc network with N nodes. Moreover, we analyze the throughput of the PHY caching scheme for regular wireless adhoc networks and study the impact of various system parameters on the PHY caching gain.
15 pages, 12 figures, accepted by IEEE Transactions on Wireless Communications