Using Layered-Division-Multiplexing to Achieve Enhanced Spectral Efficiency in 5G-MBMS

Zhang, Liang; Wu, Yiyan; Li, Wei; Park, Sung Ik; Lee, Jae-Young; Hur, Namho; Kim, Heug-Mook

doi:10.1109/bmsb47279.2019.8971874

Cited by 10 publications

(3 citation statements)

References 7 publications

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“…In the current LTE network, the Evolved Multimedia Broadcast Multicast Services (LTE eMBMS) are delivered in eMBMS sub-frames in the available Physical Resource Blocks (PRB) in TDM mode [7]. However, the inclusion of LDM in 5G-MBMS [8], [9] enables the provision of unicast, multicast or broadcasting services, multiplexed across the multi-layer architecture.…”

Section: Introductionmentioning

confidence: 99%

Experimental Assessment of New Generation Radio Networks Based on Layered Division Multiplexing

Alonso¹,

David²,

Deruyck³

et al. 2022

IEEE Trans. on Broadcast.

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Despite the recent advances in broadband penetration and accessibility, broadcasting networks continue to be the most efficient way for delivering media content to large areas independently of the user density. Nevertheless, a convergence of broadcasting services into the broadband networks is foreseen. In this context, Layered Division Multiplexing (LDM) allows the joint provision of unicast, multicast, and broadcast services in mobile cells infrastructure. Despite the success of LDM in broadcasting infrastructure, its practical application in Long Term Evolution networks providing Evolved Multimedia Broadcast Multicast Services (LTE eMBMS) and 5G-MBMS is more difficult. In this paper, we experimentally quantify the cellinterference and its impact on the network performance and Quality of Service. Our experiments reveal that the inter-cell interference margin for LTE eMBMS is about 3 dB higher compared to traditional LTE networks. If a layered architecture is incorporated this higher inter-cell interference would cause a reduction of approximately 19% of the Enhanced Layer (Lower Layer) coverage.

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Section: Introductionmentioning

confidence: 99%

Experimental Assessment of New Generation Radio Networks Based on Layered Division Multiplexing

Alonso¹,

David²,

Deruyck³

et al. 2022

IEEE Trans. on Broadcast.

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“…LDM is a non-orthogonal multiple access (NOMA) technology. Both NOMA and point-to-multipoint (P2MP) have been identified as essential technologies for 5G to make more efficient use of the spectrum [ 14 , 15 , 16 ]. Ref.…”

Section: Introductionmentioning

confidence: 99%

Enhanced LDM for Next-Generation Digital Broadcasting Transmission

Deng

Bian

2021

Sensors

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In the traditional layered division multiplexing (LDM) system, by simply adjusting the injection level, the reception performance of the core layer (CL) mobile services will be decreased significantly, resulting in the deterioration of system coverage performance. Thus, it is necessary to improve the performance of the enhanced layer (EL) service reception without affecting the reception threshold of CL service. To achieve this, in this paper, an enhanced LDM (En-LDM) scheme that supports multi-service transmission is proposed for the next-generation broadcasting network. In this scheme, at the transmitter end, part of the low-density parity-check (LDPC) coded data stream of fixed service conveyed in the EL will be extracted out through puncturing, and then, it will be transmitted over the CL of the LDM signal along with the original CL data in a frequency domain multiplexing (FDM) manner. At the receiving end, the punctured data of the EL fixed service will be recovered with a higher signal-to-noise ratio (SNR). Compared to the traditional LDM scheme, the proposed En-LDM scheme can significantly improve the reception performance of fixed services without decreasing the SNR threshold of mobile services. Moreover, the En-LDM can achieve a higher channel capacity than that of the traditional LDM for both the fixed services and the overall services. The superiority of the proposed En-LDM scheme over the traditional LDM scheme is validated by the simulation under the additive white Gaussian noise (AWGN) and fading channels.

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“…Point-to-multipoint (P2MP) transmission mode will be supported in future networks to achieve high spectrum efficiency and high capacity [7]. Eventually, NOMA and P2MP have been identified as key technologies for more efficient use of spectrum in 5G [8][9][10]. Reference [7] proves that the 5G P2MP subsystem with LDM can make use of the broadband infrastructure to provide high-quality broadcast-type services.…”

Section: Introductionmentioning

confidence: 99%

LDM-Ex-FDM: A Novel Multi-Service Transmission Scheme for the ATSC 3.0 System

Deng

Bian

2021

Applied Sciences

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In order to improve system coverage performance, in this paper, a multi-service transmission scheme on the basis of the puncturing technique, namely layered division multiplexing extension frequency-division multiplexing (LDM-Ex-FDM), is proposed. The key idea of the proposed scheme is that the symbols punctured from the enhanced layer (EL) of fixed services will be independently transmitted on a certain number of subcarriers orthogonal to the LDM signal of the core layer (CL) and most of the EL. By doing so, the punctured symbols will be demodulated with a higher signal-to-noise ratio (SNR) on the receiver side and can be recovered well, thus improving the reception performance of the EL fixed services. Moreover, two puncturing strategies based on bit-interleaved coded modulation (BICM) symbols of the LDM-Ex-FDM scheme, namely equal interval symbol puncturing (EISP) and non-equal interval symbol puncturing (NEISP), are developed to improve the performance of the EL services. Simulation results are given to show that, when the puncturing rate in the LDM-Ex-FDM scheme is configured as 1/12, the performance of the fixed service can be improved by 1.8 dB, meanwhile the bit error rate (BER) performance of the mobile service is not affected. Thus, the overall system coverage performance can be improved. Furthermore, to reduce the computational complexity and the demodulation delay of fixed service carried in the EL, at the receiver, a direct interference cancellation (DIC) detector is proposed as well. Simulation results are given to show that, under high injection level and high modulation order, the proposed DIC scheme is able to achieve almost the same BER performance as that of the traditional successive interference cancellation (SIC) scheme while with lower computational complexity.

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Using Layered-Division-Multiplexing to Achieve Enhanced Spectral Efficiency in 5G-MBMS

Cited by 10 publications

References 7 publications

Experimental Assessment of New Generation Radio Networks Based on Layered Division Multiplexing

Experimental Assessment of New Generation Radio Networks Based on Layered Division Multiplexing

Enhanced LDM for Next-Generation Digital Broadcasting Transmission

LDM-Ex-FDM: A Novel Multi-Service Transmission Scheme for the ATSC 3.0 System

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