Optimized Asymmetric Cooperation for Downlink Cloud Radio Access Network under per-Base Station Data Transfer Constraint

2017-01-01
Kadan, Fehmi Emre
Yılmaz, Ali Özgür
Using multicell cooperation between several base stations (BSs) connected to a central processor (CP) via finite capacity digital backhaul links, the inter-cell interference, which is known to limit the standard cellular systems, can be mitigated. When all user data is sent to each BS through the CP, which is referred as the full cooperation, the interference can be perfectly eliminated, however, this may cause the capacity of backhaul links to be exceeded. In this study, it is aimed to find the optimal asymmetric cooperation strategy for downlink cloud radio access network (C-RAN) which minimizes the total transmitted power from BSs where each user's signal-to-interference-and-noise ratio (SINR) is lower bounded and the number of user data streams sent by each BS is limited. The original problem is NP-hard and requires a combinatorial search. In this paper, we propose two sub-optimal cooperation methods. The first method is based on iteratively increasing the number of users served by the BSs until all users are chosen, and the second is based on iteratively adding a user data stream to be sent to a BS. We also consider a known method, iterative link removal, which is based on iteratively removing a user data from a BS by starting the full cooperation scheme, and a modified version of this method as a comparison. The simulation results show that the proposed methods can provide better performance in comparison to other methods in the literature.
IEEE International Conference on Communications (ICC) / Wireless Communications Symposium / 3rd Workshop on Optical Wireless Communications (OWC)

Suggestions

Game Theory Based Secure Wireless Powered D2D Communications with Cooperative Jamming
Chu, Zheng; Nguyen, Huan X.; Tuan Anh Le, Tuan Anh Le; Karamanoglu, Mehmet; Duc To, Duc To; Ever, Enver; Al-Turjman, Fadi; Yazıcı, Adnan (2017-03-31)
In this paper, we consider a secure wireless powered device-to-device (D2D) communication in the presence of the multiple eavesdroppers, where a smart hybrid base station (BS) in cellular network not only charges for the D2D transmitter to guarantee power efficiency for the D2D network, but also serves as a cooperative jammer (CJ) to interfere with the eavesdroppers. Although the cellular networks share their own spectrum with the D2D underlay network, both of them may not belong to the same service provide...
Optimal resource allocation algorithms for efficient operation of wireless networks
Özel, Ömür; Uysal Bıyıkoğlu, Elif; Department of Electrical and Electronics Engineering (2009)
In this thesis, we analyze allocation of two separate resources in wireless networks: transmit power and buffer space. Controlled allocation of power can provide good performance for both users and the network. Although centralized mechanisms are possible, distributed power control algorithms are preferable for efficient operation of the network. Viewing distributed power allocation as the collection of rational decisions of each user, we make game theoretic problem formulations, devise distributed algorith...
Optimization of location and number of lightning arresters in 420 kV substations in Turkish high voltage electricity system
Tulaz, Mert Ozan; Güven, Ali Nezih; Department of Electrical and Electronics Engineering (2014)
Insulation coordination is defined as the selection of the dielectric strength of equipment in relation to the voltages which can appear on the system for which the equipment is intended and taking into account the service environment and the characteristics of the available protective devices. In an insulation coordination study, the voltage levels of power system equipment are determined in order to ensure the protection of equipment against overvoltages. This proper design in terms of the insulation coor...
Performance of IRI-based ionospheric critical frequency calculations with reference to forecasting
ÜNAL, İBRAHİM; Senalp, Erdem Turker; YEŞİL, ALİ; Tulunay, Ersin; Tulunay, Yurdanur (American Geophysical Union (AGU), 2011-01-27)
Ionospheric critical frequency (foF2) is an important ionospheric parameter in telecommunication. Ionospheric processes are highly nonlinear and time varying. Thus, mathematical modeling based on physical principles is extremely difficult if not impossible. The authors forecast foF2 values by using neural networks and, in parallel, they calculate foF2 values based on the IRI model. The foF2 values were forecast 1 h in advance by using the Middle East Technical University Neural Network model (METU-NN) and t...
Finite Horizon Online Packet Scheduling with Energy and Delay Constraints
Bacınoğlu, Baran Tan; Uysal, Elif (2013-07-05)
A finite horizon optimal packet scheduling problem with data and energy causality constraints is posed. The slotted structure of the problem makes discrete time stochastic dynamic programming suitable for obtaining its optimal solution. This structure also enables an offline optimal solution that facilitates an online scheduling heuristic. The online heuristic, which does not require prior knowledge of data and energy arrival statistics, is observed (via simulations) to perform closely to the online optimal...
Citation Formats
F. E. Kadan and A. Ö. Yılmaz, “Optimized Asymmetric Cooperation for Downlink Cloud Radio Access Network under per-Base Station Data Transfer Constraint,” presented at the IEEE International Conference on Communications (ICC) / Wireless Communications Symposium / 3rd Workshop on Optical Wireless Communications (OWC), Paris, FRANCE, 2017, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/57658.