Cooperation Strategies for Partly Wireless C-RAN

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This letter presents a variant of cloud radio access network (C-RAN) architecture, which we term partly wireless C-RAN (PW-CRAN). It is characterized by extra radio nodes connected through the existing remote radio heads. Because of the newly connected nodes and the consequent additional delay, the operation of PW-CRAN requires different approaches compared with that of the typical C-RAN. Specifically, the effect of delayed channel state information on the suitability of network cooperation should be identified. To tackle this problem, we introduce two representative cooperation strategies and evaluate the performance with regard to the delay via simulations. Numerical results suggest that it is better to exclude the extra nodes from cooperation if they incur excess delay. Furthermore, whether the delay is deemed excessive depends on the interference environment. Hence, we provide quantified guidelines on the cooperation strategy of PW-CRAN.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2018-06
Language
English
Article Type
Article
Keywords

RADIO ACCESS NETWORKS; FRONTHAUL

Citation

IEEE COMMUNICATIONS LETTERS, v.22, no.6, pp.1248 - 1251

ISSN
1089-7798
DOI
10.1109/LCOMM.2018.2807814
URI
http://hdl.handle.net/10203/244006
Appears in Collection
EE-Journal Papers(저널논문)
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