Results (
Thai) 2:
[Copy]Copied!
We formulate the problem as a Network Utility Maximum
(NUM) problem. By dual decomposition techniques
[5], a pricing-based distributed algorithm is developed.
With this algorithm, each sensor node can dynamically
regulate its data rate and control its own power consumption.
Considering the time-varying wireless environment
in WSNs, the feedback control information is noisy in nature,
so we study the stochastic stability of our algorithm
with noisy feedback. By using stochastic approximation
and convex programming theories, the stability of the proposed
algorithm is investigated by convergence analysis
under stochastic perturbations. Our finding shows that
the proposed algorithm converges with probability one
(w.p.1) to optimal solution only if the estimator of subgradients
is asymptotically unbiased.
The rest of this paper is organized as follows. After a
brief description of the motivations in Section 2, Section
3 presents the background and a review of related work.
Section 4 shows our system model and problem. In Section
5, we apply duality theory to obtain a price-based distributed
algorithm and study its stochastic stability in next
Section 6. Section 7 provides simulation results. Finally
Section 8 concludes this paper.
Being translated, please wait..
