Analysis and Optimization of Cache-Enabled Networks with Random DTX Scheme

08/01/2020
by   Le Yang, et al.
0

In this paper, we focus on the meta distribution for the cache-enabled networks where the locations of base stations (BSs) are modeled as Poisson point process (PPP). Under the random caching framework, we derive the moments of the conditional successful transmission probability (STP), the exact meta distribution and its beta approximation by utilizing stochastic geometry. The closed-form expression of the mean local delay is also derived. We consider the maximization of the STP and the minimization of the mean local delay by optimizing the caching probability and the BS active probability, respectively. For the former, a convex optimization problem is formulated and the optimal caching probability and BS active probability are achieved. Moreover, most popular caching (MPC) is proved to optimal under the constraint that the mean local delay is finite. For the latter, a non-convex optimization problem is formulated and an iterative algorithm is proposed to obtain the optimal solution. The backhaul delay has a significant influence on the caching strategy. MPC is proved to be optimal when the backhaul delay is relatively low and the uniform caching (UC) is the optimal caching strategy when the backhaul delay is very large. Finally, the numerical results reveal the effect of the key network parameters on the cache-enabled networks in terms of STP, variance, meta distribution and mean local delay.

READ FULL TEXT
research
09/16/2020

A Fine-Grained Analysis of mmWave Heterogeneous Networks

A fine-grained analysis of the cache-enabled networks is crucial for sys...
research
12/26/2019

Edge Caching with Real-Time Guarantees

In recent years, optimization of the success transmission probability in...
research
03/27/2020

Distributed Caching for Data Dissemination in the Downlink of Heterogeneous Networks

Heterogeneous cellular networks (HCN) with embedded small cells are cons...
research
08/28/2018

Edge Caching for Cache Intensity under Probabilistic Delay Constraint

In order to reduce the latency of data delivery, one of techniques is to...
research
01/09/2018

Enhancing Performance of Random Caching in Large-Scale Wireless Networks with Multiple Receive Antennas

To improve signal-to-interference ratio (SIR) and make better use of fil...
research
01/21/2021

Probabilistic Placement Optimization for Non-coherent and Coherent Joint Transmission in Cache-Enabled Cellular Networks

How to design proper content placement strategies is one of the major ar...
research
09/10/2022

Optimization of the fluid model of scheduling: local predictions

In this research a continuous model for resource allocations in a queuin...

Please sign up or login with your details

Forgot password? Click here to reset