Investigation on System Performance of L1/L3 Relays in LTE-Advanced Downlink

This paper investigates the downlink system level performance for Layer-3 (L3) and Layer-1 (L1) relays with orthogonal frequency division multiple access (OFDMA) used in LTE-Advanced. Various practical factors are taken into account in the evaluations such as the processing delay and upper-bound of...

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Bibliographic Details
Main Authors: Nagata, S., Yan, Y., Gao, X., Li, A., Kayama, H., Abe, T., Nakamura, T.
Format: Conference Proceeding
Language:English
Subjects:
Delay
Downlink
Fading
Interference
Noise
Relays
Throughput
Online Access:Request full text
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Summary:This paper investigates the downlink system level performance for Layer-3 (L3) and Layer-1 (L1) relays with orthogonal frequency division multiple access (OFDMA) used in LTE-Advanced. Various practical factors are taken into account in the evaluations such as the processing delay and upper-bound of the amplifier gain of the L1 relay, capacity limitation of the backhaul channels, and empty buffer status at the L3 relay. Based on system-level simulations, we clarify the system impact of several conditions for the relay such as a relay location, the number of relay nodes, the number of backhaul (radio link between eNode B and L3 relay) subframes, and investigate the throughput performance gain of the Release 10 LTE L3 relay compared to the L1 relay.
ISSN:1550-2252
DOI:10.1109/VETECS.2011.5956620