US 7,586,990 B2
Method and system for allocating subcarriers to subscriber devices
Vijay G. Subramanian, Chicago, Ill. (US); Rajeev Agrawal, Northbrook, Ill. (US); Randall Berry, Chicago, Ill. (US); and Jiawei Huang, Princeton, N.J. (US)
Assigned to Motorola, Inc., Schaumburg, Ill. (US); and Northwestern University, Evanston, Ill. (US)
Filed on Nov. 22, 2005, as Appl. No. 11/286,944.
Prior Publication US 2007/0116139 A1, May 24, 2007
Int. Cl. H04K 1/10 (2006.01); H04L 27/00 (2006.01)
U.S. Cl. 375—260  [375/316] 19 Claims
OG exemplary drawing
 
1. A method for allocating a plurality of subcarriers to a plurality of subscriber devices in a wireless network, the method comprising:
identifying a power for a transmission on each subcarrier of the plurality of subcarriers;
assigning a dynamic weight to at least one subscriber device of the plurality of subscriber devices at each decision instance of the transmission corresponding to the at least subscriber device, wherein the assignment of the dynamic weight is based on queue length requirements of one or more flows of the at least one subscriber device;
determining a set of optimum values for the power based on the dynamic weight, wherein the set of optimum values are determined under a set of constraints for each subcarrier of the plurality of subcarriers, and comprising optimizing a rate vector Vt, of the form

OG Complex Work Unit Drawing
where ηt represents the collective (of all users) channel state at time t, R(ηt) is the rate region at time t, vi is a rate for the subscriber device Si and wi, is the dynamic weight assigned to vi; and
allocating at least one subcarrier of the plurality of subcarriers to at least one subscriber device based on at least one optimum value of the set of optimum values.