ICC 2008, IEEE International Conference on Communications, May 19-23, 2008, Beijing, China
We consider a hierarchical spectrum sharing scheme wherein a secondary wireless system is allowed to share spectrum while maintaining priority for the primary system. Under this setting, we consider the problem of allocating transmit powers for the primary and secondary transmissions so as to maximize the sum rate of the two systems, while maintaining a minimum rate for the primary system. We determine the optimum power allocation for two cases corresponding to power values being (i) continuous real in a given range, and (ii) from a discrete set. We show that the optimal power allocation for both cases can be found to be one among a small set of points, and can be determined by an O(1) algorithm.
Type:
Conference
City:
Beijing
Date:
2008-05-19
Department:
Communication systems
Eurecom Ref:
2835
Copyright:
© 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
See also:
