Site-specific knowledge and interference measurement for improving frequency allocations in wireless networks

Jeremy K. Chen, Gustavo de Veciana, Theodore S. Rappaport

Research output: Contribution to journalArticle

Abstract

We present new frequency allocation schemes for wireless networks and show that they outperform all other published work. Two categories of schemes are presented: 1) those purely based on measurements and 2) those that use site-specific knowledge, which refers to knowledge of building layouts, the locations and electrical properties of access points (APs), users, and physical objects. In our site-specific knowledge-based algorithms, a central network controller communicates with all APs and has site-specific knowledge so that it can a priori predict the received power from any transmitter to any receiver. Optimal frequency assignments are based on predicted powers to minimize interference and maximize throughput. In our measurement-based algorithms, clients periodically report in situ interference measurements to their associated APs; then, the APs' frequency allocations are adjusted based on the reported measurements. Unlike other work, we minimize interference seen by both users and APs, use a physical model rather than a binary model for interference, and mitigate the impact of rogue interference. Our algorithms consistently yield high throughput gains, irrespective of the network topology, AP activity level, number of APs, rogue interferers, and available channels. Our algorithms outperform the best published work by 18.5%, 97.6%, and 1180% for median, 25th percentile, and 15th percentile user throughputs, respectively.

Original languageEnglish (US)
Pages (from-to)2366-2377
Number of pages12
JournalIEEE Transactions on Vehicular Technology
Volume58
Issue number5
DOIs
StatePublished - 2009

Fingerprint

Frequency allocation
Wireless Networks
Wireless networks
Interference
Throughput
Percentile
Transmitters
Electric properties
Frequency Assignment
Minimise
Topology
Electrical Properties
Controllers
Knowledge-based
Knowledge
Physical Model
Network Topology
Transmitter
High Throughput
Layout

Keywords

  • Cellular networks
  • Frequency allocation
  • Radio spectrum management
  • Site-specific knowledge
  • Wireless local area network (WLAN)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Aerospace Engineering
  • Automotive Engineering
  • Computer Networks and Communications
  • Applied Mathematics

Cite this

Site-specific knowledge and interference measurement for improving frequency allocations in wireless networks. / Chen, Jeremy K.; de Veciana, Gustavo; Rappaport, Theodore S.

In: IEEE Transactions on Vehicular Technology, Vol. 58, No. 5, 2009, p. 2366-2377.

Research output: Contribution to journalArticle

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