Dynamic cell activation and user association for green 5G heterogeneous cellular networks

Tran, Gia Khanh; Shimodaira, Hidekazu; Rezagah, Roya E.; Sakaguchi, Kei; Araki, Kiyomichi

doi:10.1109/pimrc.2015.7343694

Cited by 25 publications

(10 citation statements)

References 13 publications

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“…Due to the computational efficiency of cloud radio access networks (C-RANs), the authors targeted joint RAs in other works [29][30][31][32][33][34][35] for OFDMA-based C-RANs. In the work of Shi et al, 29 the authors jointly considered transmit power minimization and RRH association using beamforming provided that the users data rate requirement is guaranteed.…”

Section: Related Workmentioning

confidence: 99%

“…The energy-efficient RA problems have been well studied for various systems, eg, other works [14][15][16][17] have considered energy-efficient RA in OFDMA-based HetNets, while previous works [18][19][20][21][22][23][24][25][26][27][28] were based on SC-FDMA-based HetNets. Furthermore, other works [29][30][31][32][33][34][35][36][37][38][39] have considered the energy-efficient RA problems in OFDMA-based C-RAN, except the work of Tran et al, 36 which is based on nonorthogonal multiple-access-based H-CRAN, while the work of Ali et al 40 considered network sum rate maximization in multitier C-RAN. Table 1 contains the summary of these works.…”

Section: Contributionmentioning

confidence: 99%

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Energy‐efficient resource allocation and RRH association in multitier 5G H‐CRANs

Ali

Ahmad

Khan

2018

Trans Emerging Tel Tech

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The rapid growth of connected devices and multimedia applications intensify the needs of high data rate and energy‐efficient networks. Multitier heterogeneous cloud radio access networks have been presented as a capable candidate for fifth‐generation networks for much higher data rate and energy efficiency (EE) than fourth generation. Therefore, in this paper, we consider the EE maximization in the uplink of a single‐carrier frequency division multiple access–based multitier heterogeneous cloud radio access network. We formulate a joint subchannel assignment, power allocation, and remote radio head association problem for EE maximization. Single‐carrier frequency division multiple access introduces subchannel exclusivity and subchannel adjacency constraints. These constraints, respectively, ensure the allocation of a subchannel to a single user at a time and the allocation of multiple subchannels to a user only if they are adjacent. In addition, we put constraints on each user's minimum data rate and maximum transmit power. Due to the simultaneous consideration of these four constraints, the solution of the formulated problem becomes harder. Therefore, a three‐step algorithm is developed, which solves this problem in an iterative manner. Simulation results verify that our proposed algorithm significantly improve the EE of the network.

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Section: Related Workmentioning

confidence: 99%

Section: Contributionmentioning

confidence: 99%

Energy‐efficient resource allocation and RRH association in multitier 5G H‐CRANs

Ali

Ahmad

Khan

2018

Trans Emerging Tel Tech

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“…The second demonstration of PoC was the ability to control and optimize the operation of the network resources in terms of energy efficiency by using the developed multi-RAT CP [71,72]. The centralized RAN (C-RAN), which is LTE eNB in this case, processes context information on its mmWave small cell base stations, including the number of connected user devices and their traffic demand.…”

Section: Proof Of Concept Implementation and Integrationmentioning

confidence: 99%

“…It is also clear that the performance of energy efficiency maximization (purple line) in the 60-GHz band has much better performance in terms of energy efficiency compared to that of system rate maximization (yellow line) in 60 GHz without the control of small cell on/off. In this demonstration, we just showed a snapshot of “Small Cell On/Off”; however, the details of optimization algorithm and simulation results can be seen in [71,72]. …”

Section: Proof Of Concept Implementation and Integrationmentioning

confidence: 99%

Proof-of-Concept of a Millimeter-Wave Integrated Heterogeneous Network for 5G Cellular

Okasaka

Weiler

Keusgen

et al. 2016

Sensors

Self Cite

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The fifth-generation mobile networks (5G) will not only enhance mobile broadband services, but also enable connectivity for a massive number of Internet-of-Things devices, such as wireless sensors, meters or actuators. Thus, 5G is expected to achieve a 1000-fold or more increase in capacity over 4G. The use of the millimeter-wave (mmWave) spectrum is a key enabler to allowing 5G to achieve such enhancement in capacity. To fully utilize the mmWave spectrum, 5G is expected to adopt a heterogeneous network (HetNet) architecture, wherein mmWave small cells are overlaid onto a conventional macro-cellular network. In the mmWave-integrated HetNet, splitting of the control plane (CP) and user plane (UP) will allow continuous connectivity and increase the capacity of the mmWave small cells. mmWave communication can be used not only for access linking, but also for wireless backhaul linking, which will facilitate the installation of mmWave small cells. In this study, a proof-of-concept (PoC) was conducted to demonstrate the practicality of a prototype mmWave-integrated HetNet, using mmWave technologies for both backhaul and access.

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“…While SDN-based wireless BH architectures have been previously deployed in indoor and outdoor testbeds [5]- [7], the calculation of new BH configuration states has only been studied using mathematical models. Examples optimize the BH topology, routing, and UE assignment, while minimizing the energy consumption [8]- [10]. However, the orchestration of the different steps to transition from an existing topology to a new one has not been thoroughly considered.…”

Section: Introductionmentioning

confidence: 99%

Fast Steerable Wireless Backhaul Reconfiguration

Santos

Skorin-Kapov²,

Ghazzai

et al. 2019

2019 IEEE Global Communications Conference (GLOBECOM)

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Future mobile traffic growth will require 5G cellular networks to densify the deployment of small cell base stations (BS). As it is not feasible to form a backhaul (BH) by wiring all BSs to the core network, directional mmWave links can be an attractive solution to form BH links, due to their large available capacity. When small cells are powered on/off or traffic demands change, the BH may require reconfiguration, leading to topology and traffic routing changes. Ideally, such reconfiguration should be seamless and should not impact existing traffic. However, when using highly directional BH antennas which can be dynamically rotated to form new links, this can become time-consuming, requiring the coordination of BH interface movements, link establishment and traffic routing. In this paper, we propose greedy-based heuristic algorithms to solve the BH reconfiguration problem in real-time. We numerically compare the proposed algorithms with the optimal solution obtained by solving a mixed integer linear program (MILP) for smaller instances, and with a sub-optimal reduced MILP for larger instances. The obtained results indicate that the greedy-based algorithms achieve good quality solutions with significantly decreased execution time.

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Dynamic cell activation and user association for green 5G heterogeneous cellular networks

Cited by 25 publications

References 13 publications

Energy‐efficient resource allocation and RRH association in multitier 5G H‐CRANs

Energy‐efficient resource allocation and RRH association in multitier 5G H‐CRANs

Proof-of-Concept of a Millimeter-Wave Integrated Heterogeneous Network for 5G Cellular

Fast Steerable Wireless Backhaul Reconfiguration

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