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

Author

Nagata, Satoshi ; Yan, Yuan ; Gao, Xinying ; Li, Anxin ; Kayama, Hidetoshi ; Abe, Tetsushi ; Nakamura, Takehiro

Author_Institution

Radio Access Network Dev. Dept., NTT DOCOMO, Inc., Yokosuka, Japan

fYear

2011

fDate

15-18 May 2011

Firstpage

1

Lastpage

5

Abstract

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.

Keywords

Long Term Evolution; OFDM modulation; frequency division multiple access; relays; wireless channels; LTE L3 relay; LTE Ll relay; LTE-advanced downlink; Long Term Evolution; OFDMA; amplifier gain upper-bound; backhaul channels; backhaul subframes; downlink system level performance; layer-1 relays; layer-3 relays; orthogonal frequency division multiple access; relay nodes; Delay; Downlink; Fading; Interference; Noise; Relays; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Spring), 2011 IEEE 73rd

Conference_Location

Yokohama

ISSN

1550-2252

Print_ISBN

978-1-4244-8332-7

Type

conf

DOI

10.1109/VETECS.2011.5956620

Filename

5956620