NDLI: Uplink capacity and interference avoidance for two-tier femtocell networks

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IEEE Transactions on Wireless Communications - Front cover

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A correction in distributed adaptive power allocation for wireless relay networks

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Connectivity analysis of wireless sensor networks with regular topologies in the presence of channel fading

Design and analysis of delay-sensitive cross-layer OFDMA systems with outdated CSIT

Sequential detection for multiuser MIMO CDMA systems with single spreading code per user

Uplink capacity and interference avoidance for two-tier femtocell networks

Resource-redistributive opportunistic scheduling for wireless systems

Cognitive network access using fuzzy decision making

Joint MS-GSC combining and down-link multiuser diversity scheduling

On power control and frequency reuse in the two user cognitive channel

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Space shift keying modulation for MIMO channels

On the multicell processing capacity of the cellular MIMO uplink channel in correlated rayleigh fading environment

Low-complexity adaptive tree search algorithm for MIMO detection

Performance analysis of MIMO-MRC system in the presence of multiple interferers and noise over rayleigh fading channels

Optimal control of a single queue with retransmissions: delay-dropping tradeoffs

Delay-limited transmission in OFDM systems: performance bounds and impact of system parameters

Low complexity pilot aided frequency synchronization for OFDMA uplink transmission

Joint routing and link rate allocation under bandwidth and energy constraints in sensor networks

Hard- and soft-output trellis-based conflict resolution for bidirectional decision feedback equalization

Iterative multiuser detection with spectral efficient relaying protocols for single-carrier transmission

Frequency-domain multipacket detection: a high throughput technique for SC-FDE systems

Differential distributed cayley space-time codes

A weakly consistent scheme for IMS presence service

Power constrained distributed estimation with cluster-based sensor collaboration

Introducing hierarchy in energy games

Wireless network cocast: location-aware cooperative communications with linear network coding

ML performance analysis of the decode-and-forward protocol in cooperative diversity networks

Hybrid scheduling scheme for a cooperative relay system in heterogeneous traffic environments

On the capacity of κ-MPR wireless networks

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Uplink capacity and interference avoidance for two-tier femtocell networks

Content Provider	IEEE Xplore Digital Library
Author	Chandrasekhar, V. Andrews, J.
Copyright Year	2002
Abstract	Two-tier femtocell networks- comprising a conventional cellular network plus embedded femtocell hotspots- offer an economically viable solution to achieving high cellular user capacity and improved coverage. With universal frequency reuse and DS-CDMA transmission however, the ensuing cross-tier interference causes unacceptable outage probability. This paper develops an uplink capacity analysis and interference avoidance strategy in such a two-tier CDMA network. We evaluate a network-wide area spectral efficiency metric called the operating contour (OC) defined as the feasible combinations of the average number of active macrocell users and femtocell base stations (BS) per cell-site that satisfy a target outage constraint. The capacity analysis provides an accurate characterization of the uplink outage probability, accounting for power control, path loss and shadowing effects. Considering worst case interference at a corner femtocell, results reveal that interference avoidance through a time-hopped CDMA physical layer and sectorized antennas allows about a 7x higher femtocell density, relative to a split spectrum two-tier network with omnidirectional femtocell antennas. A femtocell exclusion region and a tier selection based handoff policy offers modest improvements in the OCs. These results provide guidelines for the design of robust shared spectrum two-tier networks.
File Size	855896
File Format	PDF
ISSN	15361276
Volume Number	8
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Femtocell networks Multiaccess communication Land mobile radio cellular systems Power generation economics Cellular networks Frequency Macrocell networks Base stations Interference constraints Capacity planning Operating contours, code division multiaccess, macrocell, femtocell, cellular, uplink capacity, outage probability.
Content Type	Text
Resource Type	Article
Subject	Applied Mathematics Electrical and Electronic Engineering Computer Science Applications

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