2011/01/14 by Sourjya Bhaumik, David Chuck, Bhaumik, Sourjya +5
Computer Science · Engineering · #Advanced Optical Network Technologies #FOS: Computer and information sciences #Networking and Internet Architecture (cs.NI) #Power Line Communications and Noise #Semiconductor Lasers and Optical Devices #cs.NI
paper · pdf · doi:10.48550/arxiv.1101.2717
Techinal Report of the paper accepted in INFOCOM Mini Conference 2011
arxiv created 2011/01/14 · openalex publication_date 2011/01/14 · arxiv updated 2015/03/17 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Access networks, in particular, Digital Subscriber Line (DSL) equipment, are a significant source of energy consumption for wireline operators. Replacing large monolithic DSLAMs with smaller remote DSLAM units closer to customers can reduce the energy consumption as well as increase the reach of the access network. This paper attempts to formalize the design and optimization of the "last mile" wireline access network with energy as one of the costs to be minimized. In particular, the placement of remote DSLAM units needs to be optimized. We propose solutions for two scenarios. For the scenario where an existing all-copper network from the central office to the customers is to be transformed into a fiber-copper network with remote DSLAM units, we present optimal polynomial-time solutions. In the green-field scenario, both the access network layout and the placement of remote DSLAM units must be determined. We show that this problem is NP-complete. We present an optimal ILP formulation and also design an efficient heuristic-based approach to build a power-and-cost-optimized access network. Our heuristic-based approach yields results that are very close to optimal. We show how the power consumption of the access network can be reduced by carefully laying the access network and introducing remote DSLAM units.