Joint Design of Fronthaul and Access Links for C-RAN With Wireless Fronthauling

Seok Hwan Park, Kyoung Jae Lee, Changick Song, Inkyu Lee

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

This work studies a joint design of fronthaul and radio access links for a cloud radio access network (C-RAN) with wireless fronthauling, where a baseband unit (BBU) controls a number of remote radio heads (RRHs) via wireless fronthaul links to communicate with user equipments (UEs). We first review a basic approach based on a single cell concept, whereby the RRHs operate as decode-and-forward (DF) relays. Then, a cooperative transmission from the RRHs based on decompress and-forward (DCF) relaying is proposed, which is a standard concept in C-RAN. For both strategies, a problem of jointly optimizing the BBU and RRH operations is tackled with the goal of maximizing the weighted sum-rate subject to the BBU and per-RRH power constraints. For each formulated problem, an iterative algorithm is derived that achieves a sequence of monotonically non-decreasing objective values at each iteration. It is confirmed via numerical results that the DCF-based cooperative scheme significantly outperforms the DF-based single-cell approach.

Original languageEnglish
Article number7573000
JournalIEEE Signal Processing Letters
VolumePP
Issue number99
DOIs
Publication statusPublished - 2016

Fingerprint

Telecommunication links
Decode-and-forward
Unit
Cooperative Transmission
Cell
Weighted Sums
Iterative Algorithm
Relay
Iteration
Numerical Results
Design
Concepts
Networks (circuits)
Review
Strategy
Standards

Keywords

  • C-RAN
  • compress-andforward
  • decode-and-forwar
  • wireless fronthaul

ASJC Scopus subject areas

  • Signal Processing
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Joint Design of Fronthaul and Access Links for C-RAN With Wireless Fronthauling. / Park, Seok Hwan; Lee, Kyoung Jae; Song, Changick; Lee, Inkyu.

In: IEEE Signal Processing Letters, Vol. PP, No. 99, 7573000, 2016.

Research output: Contribution to journalArticle

Park, Seok Hwan ; Lee, Kyoung Jae ; Song, Changick ; Lee, Inkyu. / Joint Design of Fronthaul and Access Links for C-RAN With Wireless Fronthauling. In: IEEE Signal Processing Letters. 2016 ; Vol. PP, No. 99.
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