Class-Based Shared Resource Allocation for Cell-Edge Users in OFDMA Networks

A Cluster-based Resource Allocation Scheme for OFDMA Femtocell Networks ⋆

When femtocells are deployed densely, the co-tier and cross-tier interference greatly impair the network performance in spectrum-sharing orthogonal frequency-division multiple access (OFDMA) femtocell networks. In order to solve this problem efficiently, a cluster-based resource allocation algorithm is proposed. First, the interference graph of femto-tier is built based on the measurement repor...

Radio resource allocation in OFDMA multi-cell networks

In this paper, the problem of allocating users to radio resources (i.e., subcarriers) in the downlink of an OFDMA cellular network is addressed. We consider a multi-cellular environment with a realistic interference model and a margin adaptive approach, i.e., we aim at minimizing total transmission power while maintaining a certain given rate for each user. The computational complexity issues o...

Resource Allocation in OFDMA-Based Cognitive Radio Networks via Cooperation with Primary Users

—This paper considers an OFDMA-based cooperative cognitive radio network where the secondary users (SUs) act as the relay of the primary users (PUs) while guaranteeing the quality of service (QoS) of the PUs. In return, the SUs access the spectrum licensed to PUs in both time and frequency without impacting the communication of the PUs. A joint resource allocation problem is formulated to maxi...

Resource allocation in OFDMA networks based on interior point methods

This paper studies a joint optimization problem of sub-carrier assignment and power allocation in orthogonal frequency division multiple access (OFDMA) wireless networks. A major challenge in solving the optimization problem is non-convexity caused by the combinatorial nature of sub-carrier assignment problem and/or non-convex objective functions. To address the combinatorial complexity, we for...

Radio resource allocation in relay based OFDMA cellular networks