Comprehensive Spectrum Management for Heterogeneous Networks in LTE-U

Maksymyuk, Taras; Kyryk, Maryan; Jo, Minho

doi:10.1109/mwc.2016.1600042wc

Cited by 37 publications

(17 citation statements)

References 13 publications

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“…LBT is also a regulatory requirement in many regions such as Japan, India, and Europe. In other works, [12][13][14][15][16][17][18] authors propose an enhancement to basic LBT operation for fair coexistence of LTE-U and WiFi. Tao et al 12 proposed enhancement to LBT by adaptively adjusting size of contention window for LTE-U, which resulted in QoS fairness for coexistence of WiFi and LTE-U.…”

Section: Literature Reviewmentioning

confidence: 99%

Resource allocation for licensed and unlicensed spectrum in 5G heterogeneous networks

Ali

Qaisar

Naeem

et al. 2018

Trans Emerging Tel Tech

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The foresighted enormous increase in mobile traffic over the coming years will result in severe congestion on available radio spectrum. The use of additional spectrum in future fifth‐generation mobile networks will be inevitable. Long‐Term Evolution Unlicensed (LTE‐U) is an evolving technology, which effectively utilizes available unlicensed spectrum to increase the capacity of unified fifth‐generation network. However, LTE‐U causes severe interference to existing WiFi networks, which needs to be addressed to take full advantage of LTE‐U. In this paper, we thrive to provide a suboptimal resource allocation for coexisting LTE‐U and WiFi networks to maximize throughput and, hence, minimize the interference. We formulated an optimization problem for joint user association and power allocation for licensed and unlicensed spectrum with objective to maximize sum rate of LTE‐U/WiFi heterogeneous network in a multioperator scenario, subject to minimum rate guarantee and cochannel interference threshold. We propose mesh adaptive direct search algorithm as solution to optimization problem to obtain ϵ‐optimal results. The performance of proposed algorithm is shown in terms of network key performance indicators such as throughput and number of users accommodated. We also benchmark the results from mesh adaptive direct search against outer approximation algorithm.

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Section: Literature Reviewmentioning

confidence: 99%

Resource allocation for licensed and unlicensed spectrum in 5G heterogeneous networks

Ali

Qaisar

Naeem

et al. 2018

Trans Emerging Tel Tech

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“…Most current IBFD MAC protocols are designed based on standard 802.11 protocols, such as CSMA/CA and RTS/CTS [10,11,19,[23][24][25]. Sen et al [23] proposed a CSMA/CN (collision notification) protocol.…”

Section: Related Workmentioning

confidence: 99%

A Medium Access Control Mechanism for Distributed In-band Full-Duplex Wireless Networks

Zuo¹,

Sun²,

Song³

et al. 2017

KSII TIIS

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In-band full-duplex (IBFD) wireless communication supports symmetric dual transmission between two nodes and asymmetric dual transmission among three nodes, which allows improved throughput for distributed IBFD wireless networks. However, inter-node interference (INI) can affect desired packet reception in the downlink of three-node topology. The current Half-duplex (HD) medium access control (MAC) mechanism RTS/CTS is unable to establish an asymmetric dual link and consequently to suppress INI. In this paper, we propose a medium access control mechanism for use in distributed IBFD wireless networks, FD-DMAC (Full-Duplex Distributed MAC). In this approach, communication nodes only require single channel access to establish symmetric or asymmetric dual link, and we fully consider the two transmission modes of asymmetric dual link. Through FD-DMAC medium access, the neighbors of communication nodes can clearly know network transmission status, which will provide other opportunities of asymmetric IBFD dual communication and solve hidden node problem. Additionally, we leverage FD-DMAC to transmit received power information. This approach can assist communication nodes to adjust transmit powers and suppress INI. Finally, we give a theoretical analysis of network performance using a discrete-time Markov model. The numerical results show that FD-DMAC achieves a significant improvement over RTS/CTS in terms of throughput and delay.

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“…It is clear that the FD mode could improve the physical-layer throughputs of the nodes as compared with the half-duplex (HD) mode. Furthermore, it brings new opportunities for improving the spectral efficiencies [2] and throughputs of the networks, as shown in Fig. 2.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Range-Based Collision Avoidance MAC Protocol in Wireless Full-duplex Ad Hoc Networks

Song¹,

Qi²,

Cheng³

2019

KSII TIIS

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Full-duplex (FD) technologies enable wireless nodes to simultaneously transmit and receive signal using the same frequency-band. The FD modes could improve their physical layer throughputs. However, in the wireless ad hoc networks, the FD communications also produce new interference risks. On the one hand, the interference ranges (IRs) of the nodes are enlarged when they work in the FD mode. On the other hand, for each FD pair, the FD communication may cause the potential hidden terminal problems to appear around the both sides. In this paper, to avoid the interference risks, we first model the IR of each node when it works in the FD mode, and then analyze the conditions to be satisfied among the transmission ranges (TRs), carrier-sensing ranges (CSRs), and IRs of the FD pair. Furthermore, in the media access control (MAC) layer, we propose a specific method and protocol for collision avoidance. Based on the modified Omnet++ simulator, we conduct the simulations to validate and evaluate the proposed FD MAC protocol, showing that it can reduce the collisions effectively. When the hidden terminal problem is serious, compared with the existing typical FD MAC protocol, our protocol can increase the system throughput by 80%~90%.

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Comprehensive Spectrum Management for Heterogeneous Networks in LTE-U

Cited by 37 publications

References 13 publications

Resource allocation for licensed and unlicensed spectrum in 5G heterogeneous networks

Resource allocation for licensed and unlicensed spectrum in 5G heterogeneous networks

A Medium Access Control Mechanism for Distributed In-band Full-Duplex Wireless Networks

Adaptive Range-Based Collision Avoidance MAC Protocol in Wireless Full-duplex Ad Hoc Networks

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