An experiment for sensing-based opportunistic spectrum access in CSMA/CA networks

摘要: Opportunistic access to spectrum and secondary allocation of are topics being studied by regulatory bodies organizations with interest in utilization. The DARPA ATO neXt Generation (XG) Program is investigating opportunistic use wherein users would dynamically based on its availability. Such may embody changes policies governing the RF spectrum. Additionally, methods XG program could be used for within a fixed portion open that sparsely (temporally spatially) who otherwise confined inadequate frequency bands. An XG-enabled radio sense characterize spectral activity, identify opportunities use, coordinate access, goal not interfering primary, non-XG, users. This paper describes sensor suite media control (MAC) concepts representative XG. A prototypical experiment has been conducted MAC an environment 802.11b radios. Results presented illustrate operation concept demonstrate performance parameterized load carried both