Offline delay-optimal transmission for energy harvesting nodes
Date
2016
Authors
Cong, Yirui
Zhou, Xiangyun
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers (IEEE Inc)
Abstract
This paper investigates the offline packet-delay-minimization problem for an energy harvesting transmitter. To overcome the non-convexity of the problem, we propose a C2-diffeomorphic transformation and provide the necessary and sufficient condition for the transformed problem to a standard convex optimization problem. Based on this condition, a simple choice of the transformation is determined which allows an analytically tractable solution of the original non-convex problem to be easily obtained once the transformed convex problem is solved. We further study the structure of the optimal transmission policy in a special case and find it to follow a weighted-directional-water-filling structure. In particular, the optimal policy tends to allocate more power in earlier time slots and less power in later time slots. Our analytical insight is verified by simulation results
Description
Keywords
Energy harvesting, offline transmission policy, packet delay minimization, weighted-directional-water-filling
Citation
Collections
Source
IEEE Global Communications Conference, GLOBECOM 2016 - Proceedings
Type
Conference paper
Book Title
Entity type
Access Statement
License Rights
Restricted until
2099-12-31