Design of Full Duplex Millimeter-Wave Integrated Access and Backhaul Networks

Zhang, Junkai; Garg, Navneet; Holm, Mark; Ratnarajah, Tharmalingam

doi:10.1109/mwc.001.2000199

Cited by 25 publications

(24 citation statements)

References 12 publications

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“…In order to make largescale antenna array practically feasible, a novel transceiver architecture is utilised as Fig. 2 shows, where RF beamforming is introduced to connect a small amount of RF chains to the large-scale antenna array [5]. Assume each IBFD base station (BS) is equipped with N Tx ant and N Rx ant transmit and receive antennas connected to N Tx RF and N Rx RF RF chains respectively, the RF precoder at each BS is a diagonal matrix such as The directions of beams are determined by RF precoders and combiners, whose weights can be calculated through fixed positions of UEs or beam management, which consists of beam sweeping, beam measurement, beam determination, and beam reporting (please see our previous work in [4] for more details).…”

Section: System Modelmentioning

confidence: 99%

“…represents all the interference and noise terms, and r DL i k [k] represents the receiver distortion at the DL user i k , which can also be described by Equation (5). It should be noted that the quantisation noise is not specially described here since the received signals at UEs are usually within the dynamic range of ADCs, so its effect is included in…”

Section: B Received Signalsmentioning

confidence: 99%

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Design and Analysis of In-Band Full-Duplex Private 5G Networks Using FR2 Band

2021

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This paper studies a solution for efficient industrial Internet of things (IIoT) communications through a in-band full-duplex (IBFD) enabled private 5G network in frequency range 2 (FR2) band (≥ 24.250 GHz), where ultra-reliable low-latency communications (URLLC) and enhanced mobile broadband (eMBB) devices can be simultaneously served. Large-scale antenna array and RF beamforming are applied, and a self-interference cancellation (SIC) scheme is proposed under such architecture. Particularly, the proposed RF cancellation scheme addressed two key issues of extending current technologies to wideband operations in FR2 band: limited operational bandwidth and the requirement for a large number of cancellers. Then, a frequency domain-based digital canceller is proposed to process with the residual self-interference (RSI) with short processing latency. A game theoretic user allocation algorithm is proposed to minimise cochannel interference (CCI) in a heterogeneous environment. Given a typical IIoT scenario, the performance of such IBFD private 5G network is evaluated in terms of bit-error rate (BER) and spectral efficiency (SE) through simulations and analysed based on numerical results and theoretical calculations. It is demonstrated that the latency of uplink eMBB devices can be reduced by 54% through IBFD radios, and the latency of downlink URLLC devices can be reduced to 0.5 ms with the help of flexible numerology, mini-slot, and self-contained sub-frames introduced in 5G NR. IBFD radios can enhance the SE by 92% compared to HD radios with our SIC and user allocation policy. The high SE in conjunction with abundant resources in FR2 band provide multi-Gbps peak data rates, high reliability, and massive connectivity.

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Section: System Modelmentioning

confidence: 99%

Section: B Received Signalsmentioning

confidence: 99%

Design and Analysis of In-Band Full-Duplex Private 5G Networks Using FR2 Band

2021

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“…The 3 rd Generation Partnership Project (3GPP) has standardized the new radio waveform of the 5G new mobile generation [10,11], which proposes several ways for spectral efficiency and capacity improvement. The key enablers among the alternative approaches proposal can be found, for example, massive multi-input multi-output (mMIMO), ultra-dense network, millimeter-wave (mmWave), cell-free mMIMO, and co-operative networks, which can be achieved via the development of many access points of different types; that is why it is possible to have a higher resource block per unit area, improving the capacity of the user equipment (UE) and communication networks [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…co-operative 5G network is expected to achieve more commercial deployment than relay node co-operative LTE architecture due to mmWave communications, for which the key challenge is undertaken by the very high propagation loss being substantially limited by distance in comparison with LTE frequency band. co-operative architecture simple is composed of base station, relay node (RN), and UE, where the backhaul link is established between gnodeB and relaying technology, therefore, the access link is considered between relay node and UE, as been described in [16]. In-band and out-of-band backhauling with respect to the access link can be used to implement the co-operative network, and the relay node can support access and backhaul in sub-6 GHz (FR1) and above-6 GHz (FR2) spectrum, as has been defined by the 3GPP in [17].…”

Section: Introductionmentioning

confidence: 99%

Design and Synchronization Procedures of a D&F Co-Operative 5G Network Based on SDR Hardware Interface: Performance Analysis

Peña

Alonso

2022

Sensors

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Software defined radio (SDR) is a commonly used platform for its ease of operation and cost-effectiveness for the development and testing of real wireless communication systems. By supporting high transmission rates and enabling fast and cost-effective deployments, mainly in millimeter-wave (mmWave), the co-operative 5G network has been standardized by 3GPP Release 16. In this paper, a decode-and-forward (D&F) co-operative hardware network is proposed as one of the key technologies for future 5G/6G wireless networks. The proposed system consists of an emulated base station processing unit (gnodeB), a D&F protocol and the user equipment (UE). In particular, the design of the D&F relay node is based on an MIMO layer 2 relay technology. A testbed based on an SDR platform and MatlabTM software, in which the physical broadcast channel (PBCH) transmission, physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), and downlink shared channel (DL-SCH) for transport channel coding, according to the 3GPP standardized 5G downlink signal, has been designed. The key performance indicators (KPIs), namely EVM, BER, and throughput, were measured for 5G signals with 64-QAM and 256-QAM modulation schemes. The obtained results show that the D&F co-operative 5G network achieves substantially improved KPIs in the communication between the gnodeB and the UE in an outdoor-to-indoor scenario. Furthermore, it has been demonstrated that the D&F protocol presents a good performance and behavior being compared to one commercial equipment.

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“…IAB-nodes can wirelessly communicate with both the access and the backhaul links as well as can perform IAB specific tasks such as resource allocation, route selection, and optimization [4]. This novel architecture enables cheap and dense deployment while extending the coverage in FR2 bands.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Wideband In-Band-Full-Duplex FR2-IAB Networks

Zhang,

Luo,

Garg

et al. 2021

Preprint

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This paper develops a 3GPP inspired design for the in-band-full-duplex (IBFD) Integrated Access and Backhaul (IAB) networks in the frequency range 2 (FR2) band, which can enhance the spectral efficiency (SE) and coverage while reducing the latency. However, the self-interference (SI), which is usually more than 100 dB higher than the signal-of-interest, becomes the major bottleneck in developing these IBFD networks. With the estimated RF effective channel obtained via RF codebooks given by our modified Linde-Buzo-Gray (LBG) algorithm, we design and analyze a subarray-based hybrid precoding FD-IAB system. The SI is canceled in three stages, where the antenna isolation forms the first stage and is assumed to be achieved. The second stage consists of the fiber-Bragg-grating (FBG)-based RF cancellation, where the cancelers are connected with the RF chain pairs. The third stage comprises the digital cancellation via successive interference cancellation followed by minimum mean squared error (MMSE) baseband receiver. Multiuser interference in the access link is canceled by zero-forcing at the IAB-node transmitter. Simulations show that our staged SI cancellation can enhance the SE. Moreover, the residual SI due to the hardware impairments and channel uncertainty can affect the SE of the FD scheme in the backhaul link.

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Design of Full Duplex Millimeter-Wave Integrated Access and Backhaul Networks

Cited by 25 publications

References 12 publications

Design and Analysis of In-Band Full-Duplex Private 5G Networks Using FR2 Band

Design and Analysis of In-Band Full-Duplex Private 5G Networks Using FR2 Band

Design and Synchronization Procedures of a D&F Co-Operative 5G Network Based on SDR Hardware Interface: Performance Analysis

Design and Analysis of Wideband In-Band-Full-Duplex FR2-IAB Networks

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