Resilient cloud network mapping with virtualized BBU placement for cloud-RAN

Cloud Radio Access Network (C-RAN) will improve mobile radio coordination and resource efficiency by allowing baseband processing unit (BBU) functions to be virtualized and centralized, i.e., deployed in a BBU hotel. We consider a BBU hoteling scheme based on the concept of access cloud network (ACN). An ACN consists of virtualized BBUs (vBBUs) placed in metro cloud data centers (metro DCs). A vBBU is connected to a set of remote radio heads (RRHs). ACN resiliency against network and processing failures is critical for C-RAN deployments. Hence, in this study, we propose three protection approaches: 1+1 ACN protection, 1+1 ACN and vBBU protection, and partial ACN protection. Simulation results show that both 1+1 ACN and 1+1 ACN and vBBU protection requires large capacity for backup to provide 100% survivability for singlelink and single-DC failures. As a result, we suggest a partial ACN protection approach which provides degraded services with only 8% additional network resources.

[1]  C-ran the Road towards Green Ran , 2022 .

[2]  Peter Schefczik,et al.  Radio base stations in the cloud , 2013, Bell Labs Technical Journal.

[3]  Jun Terada,et al.  Dynamic TWDM-PON for mobile radio access networks. , 2013, Optics express.

[4]  Biswanath Mukherjee,et al.  Disaster-survivable cloud-network mapping , 2014, Photonic Network Communications.

[5]  Luca Valcarenghi,et al.  On the design of 5G transport networks , 2015, Photonic Network Communications.

[6]  Raouf Boutaba,et al.  Protecting virtual networks with DRONE , 2016, NOMS 2016 - 2016 IEEE/IFIP Network Operations and Management Symposium.

[7]  Biswanath Mukherjee,et al.  A Survey on Resiliency Techniques in Cloud Computing Infrastructures and Applications , 2016, IEEE Communications Surveys & Tutorials.