Capacity comparison for CSG and OSG OFDMA femtocells

Ang Hsun Tsai*, Jane Hwa Huang, Li-Chun Wang, Ruey-Bing Hwang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations


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.

Original languageEnglish
Title of host publication2010 IEEE Globecom Workshops, GC'10
Number of pages6
ISBN (Print)9781424488650
StatePublished - 1 Dec 2010
Event2010 IEEE Globecom Workshops, GC'10 - Miami, FL, United States
Duration: 5 Dec 201010 Dec 2010

Publication series

Name2010 IEEE Globecom Workshops, GC'10


Conference2010 IEEE Globecom Workshops, GC'10
CountryUnited States
CityMiami, FL


  • CSG
  • Femtocell
  • Link reliability
  • OSG
  • Switched-beam directional antenna
  • Two-tier interference

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