Ari, Ado Adamou AbbaGueroui, AbdelhakTitouna, ChafiqThiare, OusmaneAliouat, Zibouda2022-05-102022-05-102019-09-22Ari, A.A.A., Gueroui, A.,Titouna, C., Thiare, O., Aliouat, Z. (2019) Resource allocation scheme for 5G C-RAN: a Swarm Intelligence based approach. Computer Networks, pp. 1-34. https://www.elsevier.com/open-access/userlicense/1.0/http://hdl.handle.net/123456789/1433In recent years, wireless communications are subjected to a tremendous growth in traThe recent fifth generation (5G) system enabled a highly promising evolution of Cloud Radio Access Network (C-RAN). Unlike the conventional Radio Access Network (RAN), the C-RAN decouples the baseband processing unit (BBU) from the remote radio head (RRH) by allowing BBUs from multiple Base Stations (BSs) to operate into a centralized BBU pool on a remote cloud-based infrastructure and a scalable deployment of light-weight RRHs. In this paper, we propose an efficient resource allocation scheme for 5G C-RAN called Bee-Ant-CRAN. The challenge addressed is to design a logical joint mapping between User Equipment (UE) and RRHs as well as between RRHs and BBUs. This is done adaptively to network load conditions, in a way to reducethe overall network costs while maintaining the user QoS and QoE. The network load has been formulated as a mixed integer nonlinear problem with a number of constraints. Then, the formulated optimization problem is decomposed into two stage resource allocation problem: UE-RRH association and RRH-BBU mapping. Therefore, a modified Artificial Bee Colony is developed as a swarm intelligence based approach to build the UE-RRH mapping (resource allocation). Moreover, an ameliorated Ant Colony Optimization algorithm is proposed to solve the RRH-BBU mapping (clustering) problem. Computational results demonstrate that our proposed Bee-Ant-CRAN scheme reduces the resource wastage and significantly improves the spectral efficiency as well as the throughput.enC-RANClusteringSwarm IntelligenceRRHBBUResource Allocation5GArticle