An obstacle detecting pig for preliminary inspection of a section of a pipeline travels through the section and determines if there are any restrictions that exceed industry guidelines or that might damage other pigs that require the full bore of the pipe. The invention involves routing a first portion of the exhaust stream to a carbon dioxide capture step, while simultaneously flowing a second portion of the exhaust gas stream across the feed side of a membrane, flowing a sweep gas stream, usually air, across the permeate side, then passing the permeatesweep gas back to the combustor. When the number exceeds a selected threshold, a RANcast is implemented by a RANcast implementer in which a common channel is used to broadcast the multicast data to all the mobile user endpoints.