A Linear-Complexity Resource Allocation Method for Heterogeneous Multiuser OFDM Downlink


C. Liu, A. Schmeink, R. Mathar,


        In this paper, we consider the dynamic power and rate allocation for the
heterogeneous transmission over multiuser orthogonal frequency division
multiplexing (OFDM) downlink, where users may require real time or
non-real time transmission. The data rate for the real time transmission
is lower bounded, while the total transmission power for both
transmissions is limited to a fixed amount. Solutions to this problem
must be computationally efficient in order to adapt to the fast-varying
channels in practice. To accelerate the resource allocation for the
considered scenario, efficient approaches are given to update the power
or rate variation while changing subcarrier assignments. By iteratively
using these approaches, a resource allocation method is proposed to
achieve a good balance between the performance and the complexity. Its
complexity is linearly increasing in the number of subcarriers and the
number of users. Simulation results demonstrate that our method has
small performance loss compared to the dual optimum and achieves much
better performance compared to previous works.

BibTEX Reference Entry 

	author = {Chunhui Liu and Anke Schmeink and Rudolf Mathar},
	title = "A Linear-Complexity Resource Allocation Method for Heterogeneous Multiuser {OFDM} Downlink",
	booktitle = "{IEEE} PIMRC'09",
	address = {Tokyo, Japan},
	month = Sep,
	year = 2009,
	hsb = hsb910012512,


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