Abstract
Cross-layer design and operation of wireless networks has attracted significant interest in the last decade, yet some basic problems in the area remain unsolved. In this paper, we consider the joint routing and power control problem, and specifically how to choose transmission powers at the physical layer to maximize stable end-to-end throughput at the network layer for a multi-hop wireless network. This is the back-pressure power control (BPPC) problem. Earlier work had recognized that BPPC is a non-convex problem, and suggested relatively simple suboptimal strategies. Here we show that BPPC is NP-hard. This is a negative result, which however comes with a positive flip side: drawing from related developments in the digital subscriber line (DSL) literature, we devise effective ways to approximate it. We report substantial improvements in transport capacity relative to the earlier state of art, as illustrated in pertinent simulations.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
