標題: Capacity Comparison for CSG and OSG OFDMA Femtocells
作者: Tsai, Ang-Hsun
Huang, Jane-Hwa
Wang, Li-Chun
Hwang, Ruey-Bing
交大名義發表
National Chiao Tung University
關鍵字: Femtocell;OFDMA;CSG;OSG;two-tier interference;link reliability;switched-beam directional antenna
公開日期: 2010
摘要: The low-power and low-cost femtocells can improve indoor coverage and capacity. However, when femtocells are deployed extensively, the serious two-tier interference problem occurs. The method to access the femtocell is the key to manage the interference in the femtocell systems. In this paper, we investigate the impacts of access methods and directional antenna on link reliability and capacity for the orthogonal frequency-division multiple access (OFDMA)-based femtocell systems. Simulation results show that the open access method can improve the femtocell capacity over the traditional closed access method. Nevertheless, under the link reliability requirement of indoor and outdoor users, the improvement in femtocell capacity due to open access method is minor. Thanks to the narrow-beam pattern, the switched-beam directional antenna can be used to further reduce the interference and enhance the capacity. It is shown that the open access method using the switched-beam antenna can achieve higher femtocell capacity than that using the omnidirectional antenna.
URI: http://hdl.handle.net/11536/26065
http://dx.doi.org/10.1109/GLOCOMW.2010.5700402
ISBN: 978-1-4244-8865-0
DOI: 10.1109/GLOCOMW.2010.5700402
期刊: 2010 IEEE GLOBECOM WORKSHOPS
起始頁: 653
結束頁: 658
Appears in Collections:Conferences Paper