Optimal Rate Selection for Persistent Scheduling with HARQ in Time-Correlated Nakagami-m Fading Channels

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Orthogonal frequency division multiple access (OFDMA) systems, such as IEEE 802.16e/m and 3GPP Long Term Evolution (LTE), require significantly large signaling overhead for delivering small-sized delay-sensitive traffic such as voice over IP (VoIP) service. It may result in a significant decrease in the spectral efficiency. In order to overcome this drawback, recently, a persistent scheduling scheme has been standardized in standard bodies. In order to reduce the signaling overhead, the modulation and coding scheme (MCS) is set to be fixed during a burst period for the persistent scheduling procedure and an incomplete transmission, if it occurs, is recovered by a hybrid automatic repeat request (HARQ) scheme. In this paper, considering the HARQ retransmissions, we propose a rate selection scheme for the persistent scheduling satisfying given quality of service (QoS) requirements. In our proposed rate selection scheme, we consider two important factors which were not considered in previous HARQ-related work: time-correlations of the wireless channel in the HARQ retransmissions and the resource usage of signaling overhead. Numerical results show that the proposed rate selection scheme can efficiently enhance the utilization of radio resources compared to the conventional schemes.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2011-02
Language
English
Article Type
Article
Keywords

TRANSMITTER DIVERSITY SYSTEMS; 802.16E OFDMA SYSTEM; HYBRID-ARQ; PERFORMANCE ANALYSIS; CELLULAR NETWORKS; M PARAMETER; MODULATION

Citation

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, v.10, no.2, pp.637 - 647

ISSN
1536-1276
DOI
10.1109/TWC.2011.120810.100634
URI
http://hdl.handle.net/10203/100926
Appears in Collection
EE-Journal Papers(저널논문)
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