DocumentCode :
81997
Title :
Non-Ideal Backhaul Based Spectrum Splitting and Power Allocation for Downlink CoMP in Cognitive Macro/Femtocell Networks
Author :
Feng Chen ; Wenjun Xu ; Shengyu Li ; Jiaru Lin
Author_Institution :
Key Lab. of Universal Wireless Commun. Minist. of Educ., Beijing Univ. of Posts & Telecommun., Beijing, China
Volume :
18
Issue :
6
fYear :
2014
fDate :
Jun-14
Firstpage :
1031
Lastpage :
1034
Abstract :
This letter propose a novel scheme for cognitive macro/femtocell downlink coordinated multipoint (CoMP) transmission to improve the capacity of femtocell without affecting the normal communications of macrocell users (MUs). In specific, the femtocell access point (FAP) assists the macrocell base station (MBS) by jointly transmiting to the MU in the vicinity of the femtocell. A portion of the spectrum originally assigned to the MU is reserved for CoMP. In return, the rest can be freely utilized by the femtocell. Moreover, the impact of non-ideal backhaul (NIB) is considered, which makes the joint spectrum splitting and power allocation non-convex. A universal dual bisection algorithm is proposed to achieve the globally optimal solution. Simulation results indicate that the capacity of femtocell is enhanced up to 200% relative to the traditional methods. Meanwhile, the data communications of MUs are well protected compared with the scheme that ignores the impact of NIB.
Keywords :
cognitive radio; femtocellular radio; resource allocation; FAP; MBS; cognitive macro-femtocell networks; downlink CoMP transmission; downlink coordinated multipoint transmission; femtocell access point; macrocell base station; macrocell users; nonideal backhaul based spectrum splitting; optimal solution; power allocation; universal dual bisection; Coordinate measuring machines; Downlink; Femtocell networks; Interference; Macrocell networks; Radio frequency; Resource management; Femtocell; cognitive radio; coordinated multipoint (CoMP) transmission; non-ideal backhaul; spectrum splitting;
fLanguage :
English
Journal_Title :
Communications Letters, IEEE
Publisher :
ieee
ISSN :
1089-7798
Type :
jour
DOI :
10.1109/LCOMM.2014.2317774
Filename :
6799244
Link To Document :
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