NDLI: Opportunistic spectrum aggregation for cognitive communications under collision constraints

Content Provider	IEEE Xplore Digital Library
Author	Haeyoung Lee Youngwook Ko Vahid, S. Moessner, K.
Copyright Year	2014
Description	Author affiliation: Dept. of Electron. Eng., Univ. of Surrey, Guildford, UK (Haeyoung Lee; Vahid, S.; Moessner, K.) \|\| Inst. of Electron., Queen's Univ. of Belfast, Belfast, UK (Youngwook Ko)
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.
Starting Page	7
Ending Page	12
File Size	170391
Page Count	6
File Format	PDF
ISBN	9781631900037
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-06-02
Publisher Place	Finland
Access Restriction	Subscribed
Rights Holder	ICST
Subject Keyword	Opportunistic Spectrum Access Aggregates Simulation Collision probability Spectrum aggregation Sensors Resource management Data communication Capacity planning Signal to noise ratio
Content Type	Text
Resource Type	Article

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