Three researchers from the Future Ubiquitous Networks Lab (Faculty of Engineering and Informatics) of the University of Bradford, United Kingdom presented the study entitled “Elastic Call Admission Control using Fuzzy Logic in Virtualized Cloud Radio Base Stations” at the 7th EAI International Conference on Wireless and Satellite Systems (WiSATS 2015) and won one of the two Best Paper Awards.
Tshiamo Sigwele, Prashant Pillai and Yim Fun Hu’s paper developed an intelligent elastic Call Admission Control (CAC) scheme using Fuzzy Logic in a centralized Cloud RAN (C-RAN), introduced as a way of solving the drawbacks of conventional RAN by pooling BS resources to a centralized cloud.
Call Admission Control is a RRM scheme that offers an effective way of avoiding network congestion and plays a key role in the provision of guaranteed QoS in the RAN. The function of the CAC algorithm is to decide whether a new or handoff call can be accepted into a resource-constrained network without violating the service commitments made to the already admitted calls.
The paper presents the C-RAN architecture that has been adopted, an analysis of the related work on CAC schemes, a description of the proposed eFCC and a presentation of the simulation model and the obtained performance results.
As summing up by the three researchers “The paper presents an intelligent elastic fuzzy logic based call admission control scheme in cloud radio access networks. A combination of fuzzy and C-RAN improve uncertainties and imprecations in conventional CAC schemes and combat the problem of constrained resources by sharing BS resources in the cloud”.
What is to be expected in the future? “In future the system will be extended to consider handoff calls and additional performance measures like system utilization and call dropping. The energy saving gained by virtualization and vBS migration will be the main target in future”.
The research will be published on the EAI Endorsed Transactions on Mobile Communications and Applications.