Uplink interference management for HSPA+ and 1xEVDO femtocells
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
IEEE Communications Magazine
System design of cdma2000 femtocells
IEEE Communications Magazine
Uplink interference management for HSPA+ and 1xEVDO femtocells
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Mobility and capacity offload for 3G UMTS femtocells
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
CTRL: a self-organizing femtocell management architecture for co-channel deployment
Proceedings of the sixteenth annual international conference on Mobile computing and networking
Cognitive femtocell networks: an overlay architecture for localized dynamic spectrum access
IEEE Wireless Communications
IEEE Wireless Communications
Open vs. closed access femtocells in the uplink
IEEE Transactions on Wireless Communications
A semianalytical PDF of downlink SINR for femtocell networks
EURASIP Journal on Wireless Communications and Networking - Special issue on femtocell networks
Avoidance of co-channel interference using switched parasitic array antenna in femtocell networks
ICCSA'10 Proceedings of the 2010 international conference on Computational Science and Its Applications - Volume Part III
An energy-centric handover decision algorithm for the integrated LTE macrocell-femtocell network
Computer Communications
Power Control Based on Maximum Power Adaptation in Two-Tier Femtocell Networks
Wireless Personal Communications: An International Journal
UMTS Multi-Service Uplink Capacity and Interference Statistics of Femtocells
Wireless Personal Communications: An International Journal
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Femtocells are low-power cellular base stations that operate in licensed spectrum. They are typically deployed indoors to improve coverage and provide excellent user experience, including high data rates. Cellular operators benefit from reduced infrastructure and operational expenses for capacity upgrades and coverage improvements. Femtocells also bring unique challenges, such as unplanned deployment, user installation, restricted access, and interoperability with existing handsets and network infrastructure. Although femtocells may cause some interference to other users in the network, with the use of proper interference management techniques, this can be well controlled. We present interference management techniques for both downlink and uplink of femtocells operating based on 3GPP Release 7 standards (also known as HSPA+). Femtocell carrier selection and femtocell DL Tx power self-calibration are proposed as key interference management methods for downlink. For uplink interference management, adaptive attenuation at the femtocell and limiting the Tx power of the femtocell users are proposed. Different interference models and their analysis are presented. In addition, coverage performance and capacity results are presented to quantify the benefits of femtocells. We demonstrate that in addition to coverage enhancements, significant capacity improvements are achieved on both downlink and uplink when femtocells are deployed in 3G UMTS/HSPA+ networks.