Opportunistic spectrum aggregation for cognitive communications under collision constraints

Haeyoung Lee, Youngwook Ko, Seiamak Vahid, Klaus Moessner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

We consider a collision-sensitive secondary system that intends to opportunistically aggregate and utilize spectrum of a primary system to achieve higher data rates. In such opportunistic spectrum access, secondary transmission can collide with primary transmission. When the secondary system aggregates more channels for data transmission, more frequent collisions may occur, limiting the performance obtained by the opportunistic spectrum aggregation. In this context, dynamic spectrum aggregation problem is formulated to maximize the ergodic channel capacity under the constraint of collision tolerable level. To solve the problem, we develop the optimal spectrum aggregation approach, deriving closed-form expressions for the collision probability in terms of primary user traffic load, secondary user transmission interval, and the random number of sub-channels aggregated. Our results show that aggregating only a subset of sub-channels will be a better choice, depending on the ratio of collision sensitivity requirement to the primary user traffic.

Original languageEnglish
Title of host publicationProceedings of the 2014 9th International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2014
PublisherIEEE Computer Society
Pages7-12
Number of pages6
ISBN (Print)9781631900037
DOIs
Publication statusPublished - 2014
Event9th International Conference on Cognitive Radio Oriented Wireless Networks, CROWNCOM 2014 - Oulu, Finland
Duration: 2 Jun 20144 Jun 2014

Publication series

NameProceedings of the 2014 9th International Conference on Cognitive Radio Oriented Wireless Networks and Communications, CROWNCOM 2014

Conference

Conference9th International Conference on Cognitive Radio Oriented Wireless Networks, CROWNCOM 2014
Country/TerritoryFinland
CityOulu
Period2/06/144/06/14

Keywords

  • Collision probability
  • Opportunistic Spectrum Access
  • Spectrum aggregation

Fingerprint

Dive into the research topics of 'Opportunistic spectrum aggregation for cognitive communications under collision constraints'. Together they form a unique fingerprint.

Cite this