Title :
Performance Analysis of Fractional Frequency Reuse for Multi-Cell WiMAX Networks Based on Site-Specific Propagation Modeling [Wireless Corner]
Author :
Stiakogiannakis, I.N. ; Athanasiadou, G.E. ; Tsoulos, G.V. ; Kaklamani, Dimitra I.
Author_Institution :
Sch. of Electr. & Comput. Eng., Nat. Tech. Univ. of Athens, Zografou, Greece
Abstract :
This work examines the technique of fractional frequency reuse for the downlink of multi-cellular WiMAX networks. Different frequency-reuse deployment scenarios are presented. Three schemes for the reuse zone selection are evaluated, namely, the distance-based and SINR-based approaches, as well as a new scheme, which is based on load-balancing between different reuse zones. The proposed load-balancing scheme overcomes the main weakness of the SINR-based approach, which is its inability to efficiently manage the available resources of both reuse zones as their size varies. The evaluation of the different schemes is based on simulations that employ a ray-tracing propagation model, thus estimating the propagation phenomena as closely to reality as possible. The simulation results demonstrated clearly better performance of the proposed algorithm compared to the distance-based and SINR-based approaches. It is shown that the use of fractional frequency reuse with the proposed load-balancing approach improves the performance of WiMAX networks in terms of a variety of metrics, such as blocking ratio and offered bit rate.
Keywords :
WiMax; cellular radio; ray tracing; resource allocation; SINR-based approach; distance-based approach; fractional frequency reuse; load balancing; multicell WiMAX networks; performance analysis; ray tracing propagation model; reuse zone selection; site-specific propagation modeling; IEEE 802.16 standards; Optical communication; Radio spectrum management; Radiofrequency interference; Ray tracing; WiMAX; Wireless communication; Wireless networks; Geometrical Optics; IEEE 802.16; WiMAX; Wireless communication; fractional frequency reuse; radio resource management; radio spectrum management; ray tracing; wireless networks;
Journal_Title :
Antennas and Propagation Magazine, IEEE
DOI :
10.1109/MAP.2012.6202554