Wireless Communications: Principles and Practice
Wireless Communications: Principles and Practice
Energy Consumption Issues on Mobile Network Systems
SAINT '08 Proceedings of the 2008 International Symposium on Applications and the Internet
LTE, The UMTS Long Term Evolution: From Theory to Practice
LTE, The UMTS Long Term Evolution: From Theory to Practice
Uplink capacity and interference avoidance for two-tier femtocell networks
IEEE Transactions on Wireless Communications
OFDMA femtocells: a roadmap on interference avoidance
IEEE Communications Magazine
IEEE Communications Magazine
Resource allocation with interference mitigation in femtocellular networks
Wireless Communications & Mobile Computing
Realistic Long Term Evolution Performance for Massive HeNB Residential Deployments
Wireless Personal Communications: An International Journal
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Femto-cells consist of user-deployed Home Evolved NodeBs (HeNBs) that promise substantial gains in system spectral efficiency, coverage, and data rates due to an enhanced reuse of radio resources. However, reusing radio resources in an uncoordinated, random fashion introduces potentially destructive interference to the system, both, in the femto and macro layers. An especially critical scenario is a closed-access femto-cell, cochannel deployed with a macro-cell, which imposes strong downlink interference to nearby macro user equipments (UEs) that are not permitted to hand over to the femto-cell. In order to maintain reliable service of macro-cells, it is imperative to mitigate the destructive femto-cell to macro-cell interference. The contribution in this paper focuses on mitigating downlink femto-cell to macro-cell interference through dynamic resource partitioning, in the way that HeNBs are denied access to downlink resources that are assigned to macro UEs in their vicinity. By doing so, interference to the most vulnerable macro UEs is effectively controlled at the expense of a modest degradation in femto-cell capacity. The necessary signaling is conveyed through downlink high interference indicator (DL-HII) messages over the wired backbone. Extensive system level simulations demonstrate that by using resource partitioning, for a sacrifice of 4% of overall femto downlink capacity, macro UEs exposed to high HeNB interference experience a tenfold boost in capacity.