Infrastructure planning and topology optimization for reliable mobile big data transmission under cloud radio access networks

Abstract

With the development of user-centered and environment sensing technology of 5G, large capacity and ubiquitous coverage and massive data collection and processing will bring new challenges in wireless networks. The cloud radio access network (C-RAN) has been envisioned to provide a new wireless architecture for reliable transmission of mobile big data. In this paper, we focus on network planning deployment issue based on the optical mixed diet (OMD) technology. Specifically, the ring and spur topology optimization (RSTO) problem under the C-RAN architecture is investigated. The RSTO problem is formulated as a generic integer linear program (ILP) which can optimally (i) minimize the network deploying cost; (ii) identify the locations of Remote Radio Units (RRUs) and optical add-drop multiplexers (OADMs); (iii) identify the association relations between RRUs and OADMs; and (iv) satisfy the mobile coverage requirements so as to allow the mobile big data to be transmitted through the RRUs. We propose a new heuristic algorithm based on C-RAN architecture. Numerical results validate the ILP formulation and show the performance benefits of the proposed algorithm in terms of efficiency and effectiveness against Gurobi, which is an ILP solver. In numerical studies, we also demonstrate the performance benefits of the incorporation of CoMP technology in terms of total deployment cost reduction.

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Optimizing C-RAN Backhaul Topologies: A Resilience-Oriented Approach Using Graph Invariants

“…The design of communication networks has been discussed for decades. There is a consensus in the literature on treating this problem as a multi-objective optimization problem [12][13][14][15][16][17], which maps aspects such as cost, performance, and survivability into constraints. Whereas this consensus suggests a common methodology for network design, it reduces the design problem to a general cost optimization formulation, where the topology is a mere input of this problem, neglecting the role of the topology properties as a relevant component of the solution.…”