Generalized Cross-Layer Designs for Generic Half-Duplex Multicarrier Wireless Networks with Frequency-Reuse

TL;DR

This paper proposes novel joint routing, scheduling, and power allocation frameworks for half-duplex multicarrier wireless networks with frequency reuse, improving performance over non-reuse schemes using geometric programming.

Contribution

It introduces new optimization frameworks for joint design in multicarrier networks with frequency reuse, addressing nonconvex problems with geometric programming techniques.

Findings

Joint designs outperform non-reuse schemes

Frequency reuse enhances network performance

Locally optimal solutions are efficiently obtained

Abstract

In this paper, joint designs of data routes and resource allocations are developed for generic half-duplex multicarrier wireless networks in which each subcarrier can be reused by multiple links. Two instances are considered. The first instance pertains to the general case in which each subcarrier can be timeshared by multiple links, whereas the second instance pertains to a special case in which time-sharing is not allowed and a subcarrier, once assigned to a set of links, is used by those links throughout the signalling interval. Novel frameworks are developed to optimize the joint design of data routes, subcarrier schedules and power allocations. These design problems are nonconvex and hence difficult to solve. To circumvent this difficulty, efficient techniques based on geometric programming are developed to obtain locally optimal solutions. Numerical results show that the designs developed in both instances yield performance that is superior to that of their counterparts in which frequency-reuse is not allowed.