Indoor navigation isn't a new concept, but it often requires wireless signals or custom infrastructure, neither of which are entirely reliable. Cambridge Consultants has come up with an as-yet-unnamed technology that purports to solve the issue by utilizing low-power sensors along with a custom formula that don't require an existing framework. According to the Cambridge, UK-based company, all you need are its special Bayesian algorithm and run-of-the-mill smartphone components like accelerometers, gyroscopes and magnetometers to do the job. It has already built a concept chipset (seen above) that could be embedded in existing devices -- you can either map your location directly on it or send that info off to a remote system. The firm says the technology will be useful for firefighters and hospital workers, though we wouldn't complain if it's implemented in trade shows either. For more information on the tech, check the press release after the break.