BP-MR: Backpressure Routing for the Heterogeneous Multi-radio Backhaul of Small Cells

—Dense small cell (SC) deployments are expected to help handling the explosive growth of mobile data usage. However, the backhaul of these deployments will face several challenges where point-to-point (PTP) and point-to-multipoint (PMP) wireless technologies will be combined forming multipointto-multipoint (MP2MP) wireless mesh backhauls. In this context, routing and load balancing solutions will be of key importance to maximize the use of wireless backhaul resources. This paper presents Backpressure for Multi-Radio (BP-MR), a distributed routing and load balancing protocol specifically designed for heterogeneous MP2MP wireless mesh backhauls. The backhaul is heterogeneous in the sense that each node may embed a different number of diverse wireless interfaces. BP-MR introduces a two-stage routing process to appropriately handle Head-of-Line blocking issues that appear in such multi-radio environments. We validate these improvements with ns-3 simulations under different network condi...

• Type: Journal
• Year: 2015
• Where: MWCN
• Authors: Jorge Baranda, José Núñez-Martínez, Josep Mangues-Bafalluy
• Keywords: Computer Networks, MWCN 2015