| Texto completo | |
| Autor(es): |
Marcastel, Alexandre
[1]
;
Belmega, Elena Veronica
[1]
;
Mertikopoulos, Panayotis
[2]
;
Fijalkow, Inbar
[1]
Número total de Autores: 4
|
| Afiliação do(s) autor(es): | [1] Univ Cergy Pontoise, Univ Paris Seine, CNRS, ENSEA, ETIS, F-95302 Cergy Pontoise - France
[2] Univ Grenoble Alpes, CNRS, LIG, INRIA, F-38334 Grenoble - France
Número total de Afiliações: 2
|
| Tipo de documento: | Artigo Científico |
| Fonte: | IEEE TRANSACTIONS ON SIGNAL PROCESSING; v. 67, n. 11, p. 2987-3000, JUN 1 2019. |
| Citações Web of Science: | 0 |
| Resumo | |
One of the key challenges in Internet of Things (IoT) networks is to connect many different types of autonomous devices while reducing their individual power consumption. This problem is exacerbated by two main factors: first, the fact that these devices operate in and give rise to a highly dynamic and unpredictable environment where existing solutions (e.g., water-filling algorithms) are no longer relevant; and second, the lack of sufficient information at the device end. To address these issues, we propose a regret-based formulation that accounts for arbitrary network dynamics: this allows us to derive an online power control scheme that is provably capable of adapting to such changes, while relying solely on strictly causal feedback. In so doing, we identify an important tradeoff between the amount of feedback available at the transmitter side and the resulting system performance: if the device has access to unbiased gradient observations, the algorithm's regret after T stages is O(T-1/2) (up to logarithmic factors); on the other hand, if the device only has access to scalar, utility-based information, this decay rate drops to O(T-1/4). The above is validated by an extensive suite of numerical simulations in realistic channel conditions, which clearly exhibit the gains of the proposed online approach over traditional water-filling methods. (AU) | |
| Processo FAPESP: | 18/12579-7 - Tecnologias habilitadores para a Internet das Coisas |
| Beneficiário: | Vitor Heloiz Nascimento |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |