Secondary user VoIP capacity in opportunistic spectrum access networks with friendly scheduling

In conventional cognitive radio networks it is usually assumed that the primary network remains unchanged. The onus is then placed on the secondary network users to make the best use of any residual radio capacity. In some situations however, the primary network operator may wish to accommodate seco...

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Vydané v:2012 IEEE Wireless Communications and Networking Conference (WCNC) s. 1760 - 1765
Hlavní autori: Hassanein, H. S., Badawy, G. H., Todd, T. D.
Médium: Konferenčný príspevok..
Jazyk:English
Vydavateľské údaje: IEEE 01.04.2012
Predmet:
Base stations
Delay
Jitter
Quality of service
Real time systems
Scheduling algorithms
Upper bound
ISBN:9781467304368, 1467304360
ISSN:1525-3511
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Abstract In conventional cognitive radio networks it is usually assumed that the primary network remains unchanged. The onus is then placed on the secondary network users to make the best use of any residual radio capacity. In some situations however, the primary network operator may wish to accommodate secondary user access. This objective has motivated recent work which considers simple modifications at the primary user stations that would lead to better secondary spectrum availability. In this paper primary base station scheduling mechanisms are proposed which are designed to be friendly from a secondary network user perspective. We focus on packet scheduling algorithms which maximize friendliness when the secondary users are transmitting real-time VoIP traffic. An optimization problem is first formulated which can maximize friendliness over finite time intervals. An on-line scheduling algorithm is then proposed which attempts to achieve this goal. This is done by having the primary network temporally shape its residual capacity subject to satisfying its own packet deadline constraints. Simulation results are presented which show that our proposed scheme results in better secondary user real-time traffic support compared with conventional scheduling.
AbstractList In conventional cognitive radio networks it is usually assumed that the primary network remains unchanged. The onus is then placed on the secondary network users to make the best use of any residual radio capacity. In some situations however, the primary network operator may wish to accommodate secondary user access. This objective has motivated recent work which considers simple modifications at the primary user stations that would lead to better secondary spectrum availability. In this paper primary base station scheduling mechanisms are proposed which are designed to be friendly from a secondary network user perspective. We focus on packet scheduling algorithms which maximize friendliness when the secondary users are transmitting real-time VoIP traffic. An optimization problem is first formulated which can maximize friendliness over finite time intervals. An on-line scheduling algorithm is then proposed which attempts to achieve this goal. This is done by having the primary network temporally shape its residual capacity subject to satisfying its own packet deadline constraints. Simulation results are presented which show that our proposed scheme results in better secondary user real-time traffic support compared with conventional scheduling.
Author Todd, T. D.
Hassanein, H. S.
Badawy, G. H.
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  email: todd@mcmaster.ca
  organization: Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, ON, Canada
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Snippet In conventional cognitive radio networks it is usually assumed that the primary network remains unchanged. The onus is then placed on the secondary network...
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StartPage 1760
SubjectTerms Base stations
Delay
Jitter
Quality of service
Real time systems
Scheduling algorithms
Upper bound
Title Secondary user VoIP capacity in opportunistic spectrum access networks with friendly scheduling
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