Dynamic power allocation based on second-order control system in two-tier femtocell networks

In this paper, we investigate the joint uplink power allocation problem for the macrocell and femtocells in the new view of Control Theory . Since the wireless channels in the macrocell and the femtocells fluctuate with time, we aim at an energy-saving and adaptive power allocation scheme that is ro...

Celý popis

Uložené v:
Podrobná bibliografia
Vydané v:Peer-to-peer networking and applications Ročník 11; číslo 5; s. 940 - 954
Hlavní autori: Yuan, Yazhou, Liu, Zhixin, Wang, Jinle, Guan, Xinping
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: New York Springer US 01.09.2018
Springer Nature B.V
Predmet:
Admission control
Algorithms
Caustic soda
Cellular communication
Communications Engineering
Computer Communication Networks
Computer simulation
Control algorithms
Control systems
Control theory
Dynamic control
Electric power distribution
Energy conservation
Engineering
Information Systems and Communication Service
Interference
Maximum power
Networks
Performance indices
Power control
Power management
Robust control
Robustness (mathematics)
Signal,Image and Speech Processing
Variations
Second-order control system
Femtocell networks
Robust optimization
Power control
Admission control
ISSN:1936-6442, 1936-6450
On-line prístup:Získať plný text
Tagy: Pridať tag
Žiadne tagy, Buďte prvý, kto otaguje tento záznam!
Popis
Shrnutí:In this paper, we investigate the joint uplink power allocation problem for the macrocell and femtocells in the new view of Control Theory . Since the wireless channels in the macrocell and the femtocells fluctuate with time, we aim at an energy-saving and adaptive power allocation scheme that is robust to channel fluctuations. An optimal power allocation problem, which can satisfy the requirement of signal-to-interference-plus-noise ratio and subject to the maximum power constraint, is formulated. To obtain the robust power allocation of each user (both macrocell and femtocell users), a second-order control system is created for each cell (macrocell and femtocell). According to the second-order control system and considering the maximum power constraint, we derive a distributed robust power control algorithm. The dynamic performance and convergence of the formulated system are analyzed based on control theory. The advantage of the scheme is that some dynamic control indexes can be set in advance and the dynamic process can be controlled by setting appropriate parameters. Since femtocells share the same spectrum with the macrocell, the interference from femtocells to the macrocell base station has to be controlled to protect the normal communication of the macrocell. Then an admission control algorithm is proposed to remove the user that causes the serious interference to the macrocell, if the signal-to-interference-plus-noise ratio requirement of the macrocell user can not be satisfied. Two algorithms are particularly attractive, especially in view of practical implementation issues. Numerical simulation results are presented to illustrate the effectiveness and advantages of the proposed algorithms.
Bibliografia:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1936-6442
1936-6450
DOI:10.1007/s12083-017-0610-4