NOMA Systems With Content-Centric Multicast Transmission for C-RAN

Lee, Sang-Rim; Park, Seok-Hwan; Lee, Inkyu

doi:10.1109/lwc.2018.2829514

Cited by 11 publications

(13 citation statements)

References 17 publications

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“…The channel bandwidth and the noise power spectral density are set to 10 MHz and -169 dBm/Hz, respectively. For comparison, we present the performance of the conventional SDMA [2] and NOMA schemes [4] as well as of the RSMA-SC scheme [5] with L = 1 and S 1 = N U . To validate the effectiveness of the proposed design of sets S 1 , S 2 , .…”

Section: Numerical Resultsmentioning

confidence: 99%

“…As in [3], we refer to this approach as space-division multiple access (SDMA). To further improve the connectivity support level in C-RAN systems, an application of non-orthogonal multiple access (NOMA) technique was discussed in [4], where each UE performs successive interference cancellation (SIC) decoding until its target message is obtained. However, the NOMA scheme does not always guarantee better performance than SDMA, since the achievable rates need to be limited for successful SIC decoding.…”

Section: Introductionmentioning

confidence: 99%

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An Efficient Rate-Splitting Multiple Access Scheme for the Downlink of C-RAN Systems

Kim

Park

2019

IEEE Wireless Commun. Lett.

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This work studies the optimization of rate-splitting multiple access (RSMA) transmission technique for a cloud radio access network (C-RAN) downlink system. Main idea of RSMA is to split the message for each user equipment (UE) to private and common messages and perform superposition coding at transmitters so as to enable flexible decoding at receivers. It is challenging to implement ideal RSMA scheme particularly when there are many UEs, since the number of common signals exponentially increases with the number of UEs. An efficient RSMA scheme is hence proposed that uses a linearly increasing number of common signals whose decoding UEs are selected using hierarchical clustering. Via numerical results, we show the performance gains of the proposed RSMA scheme over conventional space-division multiple access (SDMA) and nonorthogonal multiple access (NOMA) schemes as well as over a conventional RSMA scheme that uses a single common signal.

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Section: Numerical Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An Efficient Rate-Splitting Multiple Access Scheme for the Downlink of C-RAN Systems

Kim

Park

2019

IEEE Wireless Commun. Lett.

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“…No edge caching [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]31,34,39] With edge caching [21][22][23][24][25][26][27][28]40], this work…”

Section: Edge Cachingmentioning

confidence: 99%

“…Max. spectral efficiency [4][5][6][7][8][9][10][13][14][15][16][17][18]26,39] Min. delivery latency [23,27,40] Min.…”

Section: Design Goalmentioning

confidence: 99%

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Energy-Efficient Joint Design of Fronthaul and Edge Links for Cache-Aided C-RAN Systems with Wireless Fronthaul

Kim

Hong

et al. 2019

Entropy

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This work addresses the joint design of fronthaul and edge links for a cache-aided cloud radio access network (C-RAN) system with a wireless fronthaul link. Motivated by the fact that existing techniques, such as C-RAN and edge caching, come at the cost of increased energy consumption, an energy efficiency (EE) metric is defined and adopted as the performance metric for optimization. As the fronthaul links can be used to transfer quantized and precoded baseband signals or hard information of uncached files, both soft- and hard-transfer fronthauling strategies are considered. Extensive numerical results validate the impact of edge caching, as well as the advantages of the energy-efficient design over the spectrally-efficient scheme. Additionally, the two fronthauling strategies—the soft- and hard-transfer schemes—are compared in terms of EE.

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Joint Tier Slicing and Power Control for a Novel Multicast System based on NOMA and D2D-Relay

Zhen-yu

Zhou

et al. 2020

GLOBECOM 2020 - 2020 IEEE Global Communications Conference

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NOMA Systems With Content-Centric Multicast Transmission for C-RAN

Cited by 11 publications

References 17 publications

An Efficient Rate-Splitting Multiple Access Scheme for the Downlink of C-RAN Systems

An Efficient Rate-Splitting Multiple Access Scheme for the Downlink of C-RAN Systems

Energy-Efficient Joint Design of Fronthaul and Edge Links for Cache-Aided C-RAN Systems with Wireless Fronthaul

Joint Tier Slicing and Power Control for a Novel Multicast System based on NOMA and D2D-Relay

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