Browsing by Author "Loo, Jonathan"

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Dynamic Network Slicing for Multitenant Heterogeneous Cloud Radio Access Networks
(2018-04-01)
Lee, Ying Loong
;
Loo, Jonathan
;
Chuah, Teong Chee
;
Wang, Li-Chun
;
電機工程學系
Multitenant cellular network slicing has been gaining huge interest recently. However, it is not well-explored under the heterogeneous cloud radio access network (H-CRAN) architecture. This paper proposes a dynamic network slicing scheme for multitenant H-CRANs, which takes into account tenants' priority, baseband resources, fronthaul and backhaul capacities, quality of service (QoS), and interference. The frame-work of the network slicing scheme consists of an upper-level, which manages admission control, user association, and baseband resource allocation; and a lower-level, which performs radio resource allocation among users. Simulation results show that the proposed scheme can achieve a higher network throughput, fairness, and QoS performance compared with several baseline schemes.
Joint Resource Allocation and User Association for Heterogeneous Cloud Radio Access Networks
(2016)
Lee, Ying Loong
;
Wang, Li-Chun
;
Chuah, Teong Chee
;
Loo, Jonathan
;
電機工程學系
Cloud radio access networks (C-RANs) have been regarded as a promising architecture for energy-efficient fifth generation systems. In this paper, a new joint remote radio head (RRH) activation, user-RRH pairing and resource allocation strategy is proposed for heterogeneous C-RANs (H-CRANs). We first formulate an optimization problem to maximize the energy efficiency of H-CRANs. Then, a low-complexity suboptimal solution is developed. Our proposed mechanism consists of three key procedures: 1) RRH activation is performed based on greedy RRH selection; 2) user-RRH pairing is performed based on the channel quality; 3) the resource allocation problem is solved by dual decomposition. Simulation results show that the proposed strategy can improve energy efficiency significantly.