Joint Power Allocation and Caching Optimization in Fiber-Wireless Access Networks

by   Zhuojia Gu, et al.

Fiber-Wireless (FiWi) access networks have been widely deployed due to the complementary advantages of high-capacity fiber backhaul and ubiquitous wireless front end. To meet the increasing demands for bandwidth-hungry applications, access points (APs) are densely deployed and new wireless network standards have been published for higher data rates. Hence, fiber backhaul in FiWi access networks is still facing the incoming bandwidth capacity crunch. In this paper, we involve caches in FiWi access networks to cope with fiber backhaul bottleneck and enhance the network throughput. On the other hand, power consumption is an important issue in wireless access networks. As both power budget in wireless access networks and bandwidth of fiber backhaul are constrained, it is challenging to properly leverage power for caching and that for wireless transmission to achieve optimal system performance. To address this challenge, we formulate the downlink wireless access throughput maximization problem by joint consideration of power allocation and caching strategy in FiWi access networks. To solve the problem, firstly, we propose a volume adjustable backhaul-constrained water-filling method (VABWF) to derive the expression of optimal wireless transmission power allocation. Then, we reformulate the problem as a multiple-choice knapsack problem (MCKP) and propose a dynamic programming algorithm to find the optimal solution of the MCKP problem. Simulation results show that the proposed algorithm significantly outperforms existing algorithms in terms of system throughput under different FiWi access network scenarios.


page 1

page 2

page 3

page 4

page 5

page 6

page 7


On Throughput Optimization and Bound Analysis in Cache-Enabled Fiber-Wireless Access Networks

The backhaul of fiber-wireless (FiWi) access networks is facing the band...

Transmission Delay Minimization via Joint Power Control and Caching in Wireless HetNets

A fundamental challenge in wireless heterogeneous networks (HetNets) is ...

Joint Association and Resource Allocation for Multi-Hop Integrated Access and Backhaul (IAB) Network

Integrated access and backhaul (IAB) network is envisioned as a novel ne...

Investigation of Performance in Integrated Access and Backhaul Networks

Wireless backhaul allows densification of mobile networks without incurr...

Joint Annotator-and-Spectrum Allocation in Wireless Networks for Crowd Labelling

The massive sensing data generated by Internet-of-Things will provide fu...

Performance Evaluation of a Deployed 4G LTE Network

In Ghana and many countries within Sub-Sahara Africa, Long Term Evolutio...

Please sign up or login with your details

Forgot password? Click here to reset