Utility-based efficient dynamic distributed resource allocation in buffer-aided relay-assisted OFDMA networksReport as inadecuate




Utility-based efficient dynamic distributed resource allocation in buffer-aided relay-assisted OFDMA networks - Download this document for free, or read online. Document in PDF available to download.

EURASIP Journal on Wireless Communications and Networking

, 2015:263

First Online: 22 December 2015Received: 13 May 2015Accepted: 12 November 2015

Abstract

In this paper, we study resource allocation in buffer-aided relay-assisted OFDMA networks. We consider utility-based stochastic optimization framework where there are constraints to be met either instantaneously or in average sense. Using the well-known Lyapunov drift-plus-penalty policy, we extract the instantaneous problem that needs to be solved in each slot to control the data admission and allocate the time slots, power, and subchannels. We propose the parameters that should be taken into account in utilizing the drift-plus-penalty policy in relay-assisted cellular networks, for providing fair data admission and satisfying the average power constraints. We introduce a low-complexity strategy for power and subchannel allocation and propose distributed and centralized algorithms to utilize it. Specifically, the proposed efficient dynamic distributed resource allocation EDDRA scheme is suitable for use in practice as it imposes less overhead on the system and splits the resource allocation tasks among the base station BS and the relays. Extensive simulation results show the effectiveness of the proposed parameters in meeting the objective and the constraints of the studied problem. We also show that the proposed EDDRA scheme has close performance to the proposed centralized one and outperforms an existing centralized scheme.

KeywordsOFDMA Regenerative buffering relays Distributed resource allocation Low complexity  Download fulltext PDF



Author: Javad Hajipour - Amr Mohamed - Victor C. M. Leung

Source: https://link.springer.com/







Related documents