Optimal Power Allocation in Wireless Networks with Transmitter-Receiver Power Tradeoffs

— For many wireless communication links, such as those employing turbo codes or sequentially-decoded convolutional codes, the power consumption of the decoder at the receiver depends on the received signal power and, hence, on the transmitted signal power. By transmitting a signal at a power higher than the minimum required for successful reception, the transmitter can “assist” the receiver by reducing the receiver decoding effort and thereby reducing the overall power consumption on the link. In this paper, we consider sender-receiver power tradeoffs in data-gathering trees. We formulate an optimization problem to optimally assign power to the nodes in the tree for maximizing the lifetime of the data-gathering tree, which is equivalent to the time until network partition due to battery outage. We propose a Binary Search Algorithm for optimal power assignment among nodes that maximizes the tree lifetime. Our Binary Search Algorithm can be easily extended to handle practical consi...

• Type: Conference
• Year: 2006
• Where: INFOCOM
• Authors: Sudarshan Vasudevan, Chun Zhang, Dennis Goeckel, Donald F. Towsley
• Keywords: Communications, INFOCOM 2006, Power Consumption, Sender-receiver Power Tradeoffs, Signal Power