Resource Allocation for Downlink Cellular OFDMA Systems—Part I: Optimal Allocation

Abstract

In this pair of papers (Part I and Part II in this issue), we investigate the issue of power control and subcarrier assignment in a sectorized two-cell downlink OFDMA system impaired by multicell interference. As recommended for WiMAX, we assume that the first part of the available bandwidth is likely to be reused by different base stations (and is thus subject to multicell interference) and that the second part of the bandwidth is shared in an orthogonal way between the different base stations (and is thus protected from multicell interference).Although the problem of multicell resource allocation is nonconvex in this scenario, we provide in Part I the general form of the global solution. In particular, the optimal resource allocation turns out to be "binary" in the sense that, except for at most one pivot-user in each cell, any user receives data either in the reused bandwidth or in the protected bandwidth, but not in both. The determination of the optimal resource allocation essentially reduces to the determination of the latter pivot-position.

Suboptimal resource allocation scheme for scalable video multicast in integrated mobile WiMAX/WLANs network

“…Objective function in (1) can take the general for with Lagrange multiplier [38], [39], [40], [41] (λi) as follows.…”

Downlink Resource Allocation and Frequency Reuse Schemes for WiMAX Networks

“…Of course, the single-cell assumption is simplifying and unrealistic in real-world cellular networks where intercell interference prevails. However, in some cases one can manage to use the results of single-cell analysis as a tool to tackle the more interesting and demanding multicell problem (see for example N. Ksairi & Ciblat (2011); N. Ksairi & Hachem (2010a)). …”

“…Instead, they resort to suboptimal (and rather computationally-complex) duality techniques. Thisiswhywefocusinthesequelonaspecial case of the average-rate resource allocation problem where closed-form characterization of the optimal solution has been provided in N. Ksairi & Ciblat (2011); N. Ksairi & Hachem (2010a;. In particular, we highlight the methodology adopted in these recent works and which consists in using the single-cell results as a tool to solve the more involved multicell allocation problem.…”

A Constrained Guess-Check Approach for Resource Allocation in the Robot Control System Design

“…It generally must satisfy two criteria: cost-effectiveness and fairness. Since resource allocation is a multi-faceted, challenging problem it has attracted significant attention in recent years [2][3][4][5][6][7][8][9][10].…”