Cost-effective Next Generation Mobile Fronthaul Architecture with Multi-IF Carrier Transmission Scheme

Cho, Seung-Hyun; Park, Heuk; Chung, Hwan Seok; Doo, Kyeong Hwan; Lee, Sang-Soo; Lee, Jong Hyun

doi:10.1364/ofc.2014.tu2b.6

Cited by 67 publications

(24 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on RoF Technology Supporting Two Frequency Assignments and 2 × 2 MIMO Antennas Seung-Hyun Cho, Changyo Han, Hwan Seok Chung, and Jong Hyun Lee  configuration based on the CPRI technique for supporting one RU with two frequency assignments (FAs), three sectors, and 4 × 4 MIMO antennas [6]. If a DU supports multiple RUs through the current mobile fronthaul simultaneously, then it will require additional digital data traffic.…”

Section: Demonstration Of Mobile Fronthaul Test Bedmentioning

confidence: 99%

“…Several research groups have researched and developed a mobile fronthaul using the intermediate frequency over fiber (IFoF) technique, which is a typical RoF technology [6], [11]- [14]. In an IFoF transmission system, multiple radio signals can be allocated, up to as many as the number of intermediate frequencies (IFs), within a particular bandwidth.…”

Section: Demonstration Of Mobile Fronthaul Test Bedmentioning

confidence: 99%

See 1 more Smart Citation

Demonstration of Mobile Fronthaul Test Bed Based on RoF Technology Supporting Two Frequency Assignments and 2 × 2 MIMO Antennas

Cho

Han

Chung

et al. 2015

ETRI J

Self Cite

View full text Add to dashboard Cite

We demonstrate a next-generation high-capacity mobile fronthaul based on radio over fiber (RoF) technology, which links between a digital unit and a radio unit supporting two frequency assignments and 2 × 2 multiple input, multiple output antennas. To confirm the technical feasibility of a mobile fronthaul, we experimentally investigate its down-and uplink end-to-end performances including the optical and radio frequency (RF) signal path. Frequency-dependent performance deviations, error vector magnitude variations, overall system performance variations caused by optical to electrical conversion, and intermediate frequency to RF conversions are examined. Experimental verifications on multiple LTE uplink signals are performed for the first time. We also demonstrate several commercial mobile Internet services, YouTube video streaming, and file transfers using off-the-shelf mobile devices, through a mobile fronthaul based on RoF.

show abstract

Section: Demonstration Of Mobile Fronthaul Test Bedmentioning

confidence: 99%

Section: Demonstration Of Mobile Fronthaul Test Bedmentioning

confidence: 99%

Demonstration of Mobile Fronthaul Test Bed Based on RoF Technology Supporting Two Frequency Assignments and 2 × 2 MIMO Antennas

Cho

Han

Chung

et al. 2015

ETRI J

Self Cite

View full text Add to dashboard Cite

show abstract

“…Furthermore, the number of RRHs that a wavelength division multiplexing passive optical network (WDM-PON) can support is limited in the CPRI approach, since each RRH requires one or more dedicated wavelength channels. Due to the excessive data rate incurred by CPRI, an alternative MFH architecture based on subcarrier multiplexing (SCM) has been actively studied [4]- [6], where downlink (DL) signals are multiplexed in the radio frequency (RF) domain and transmitted by a single wavelength to improve wavelength utilization. However, in previously published works, each cell site still required one or more WDM channels.…”

Section: Introductionmentioning

confidence: 99%

Wavelength Resource Sharing in Bidirectional Optical Mobile Fronthaul

Zhu

Lü

et al. 2015

J. Lightwave Technol.

View full text Add to dashboard Cite

In this paper, we propose high-capacity spectrallyefficient optical mobile fronthaul (MFH) architectures featuring wavelength resource sharing, where multiple cell sites share one dense wavelength division multiplexing (DWDM) channel instead of occupying a number of separated DWDM channels. In the downlink (DL), subcarrier multiplexing (SCM) is integrated with DWDM passive optical network. The key technical innovation lies in the reception of uplink (UL) signals being optically aggregated with ultrasmall spacing. We introduce two novel schemes for spectrally-efficient and low-complexity upstream transmissions. The first method is based on SCM in remote radio heads (RRHs) and coherent detection in baseband units (BBUs), achieving channel spacing of as small as 100 MHz. For the first time, successful coherent reception of LTE signal, whose symbol rate (15 ksps) is much smaller than the laser linewidth, is achieved by pairing a radio frequency pilot tone from each RRH. Bidirectional transmission of four 20-MHz 16-QAM-OFDM LTE-like signals with 100-MHz spacing aggregated on one wavelength is demonstrated. For the second proposed UL scheme, we report a low-complexity ultradense WDM over DWDM allocation with 1-GHz wavelength spacing and novel phase-noise-insensitive heterodyne detection using MHz-linewidth lasers and an off-the-shelf envelope detector.We experimentally demonstrate the transmission and simple detection of multichannel 100/200 Mb/s OOK or 200 Mb/s 16-QAM-OFDM signals with 1-GHz spacing over 30-km standard single mode fiber using 5-MHz-linewidth lasers. By enabling ultrahigh spectral efficiency, high receiver sensitivity, and low-complexity, the proposed approach achieves a significant breakthrough for future high-capacity mobile fronthaul systems.Index Terms-Mobile fronthaul, subcarrier multiplexing (SCM), wavelength resource sharing.

show abstract

“…To achieve efficient mobile fronthaul, transmission of multiple mobile channels in a single wavelength channel through analog signal processing that includes frequency conversion and RF combining/splitting has been proposed and numerically studied [8,9]. Recently, channel aggregation and de-aggregation based on digital signal processing (DSP) [10,11] and analog signal processing [12] have been experimentally demonstrated.…”

Section: Introductionmentioning

confidence: 99%

“…To make the aggregated RoF approach [8][9][10][11][12][15][16][17] to be compliant with the CPRI interface, the additional transmission of the CWs is needed. In this paper, we propose a novel mobile fronthaul transmission scheme to achieve bandwidth-efficient transmission of both the I/Q waveforms of wireless signals and the CWs.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth-Efficient Synchronous Transmission of I/Q Waveforms and Control Words via Frequency-Division Multiplexing for Mobile Fronthaul

Liu¹,

Zeng²,

Effenberger³

2014

2015 IEEE Global Communications Conference (GLOBECOM)

View full text Add to dashboard Cite

We propose a novel mobile fronthaul transmission scheme to achieve bandwidth-efficient transmission of both the I/Q waveforms of wireless signals and the control words (CWs) between baseband units (BBUs) and remote radio units (RRUs). Unlike the common public radio interface (CPRI) where the I/Q waveforms and the control words are transmitted as a binary sequence in the time domain, the proposed transmission scheme aggregates multiple wireless signals in the frequency domain and transmits them synchronously with a single-carrier quadratureamplitude-modulation (QAM) signal that contains the CWs on a single wavelength channel via frequency-division multiplexing. This approach substantially increases the bandwidth efficiency of the mobile fronthaul. Furthermore, we experimentally demonstrate this scheme by transmitting 32 20-MHz LTE signals together with CPRI-compliant CWs, corresponding to a CPRIequivalent data rate of 39.32 Gb/s, in single optical channel that requires a RF bandwidth of only ~1.6 GHz. After transmission over 5-km standard single-mode fiber (SSMF), the CWs are recovered without error, while the LTE signals are recovered with an error-vector magnitude (EVM) of as low as 3%. This bandwidth-efficient mobile fronthaul technique may find applications in future integrated fiber/wireless access networks to provide ultra-broadband access services.

show abstract

Cost-effective Next Generation Mobile Fronthaul Architecture with Multi-IF Carrier Transmission Scheme

Cited by 67 publications

References 2 publications

Demonstration of Mobile Fronthaul Test Bed Based on RoF Technology Supporting Two Frequency Assignments and 2 × 2 MIMO Antennas

Demonstration of Mobile Fronthaul Test Bed Based on RoF Technology Supporting Two Frequency Assignments and 2 × 2 MIMO Antennas

Wavelength Resource Sharing in Bidirectional Optical Mobile Fronthaul

Bandwidth-Efficient Synchronous Transmission of I/Q Waveforms and Control Words via Frequency-Division Multiplexing for Mobile Fronthaul

Contact Info

Product

Resources

About