Enhanced Cognitive Relaying for Providing Continuous Connections in Wireless Networks
Typically, when a target user moves from its own network, which is denoted Net1, into another one, which is denoted Net2, its services would be interrupted. In this case, the target user can be viewed as a secondary user (SU), whereas the user of Net2 is a primary user (PU). By taking the advantage of cognitive radios, the authors propose a two-phase cognitive relaying (TCR) protocol to provide continuous connections for Net1 while guaranteeing the quality-of-service (QoS) of Net2 in wireless networks. The interference cancelation and time optimization techniques are also employed in TCR to further improve the transmission performance of Net1. Under TCR, both the downlink and uplink transmissions of the target user are investigated. The authors derive the closed-form expressions of outage probabilities for traditional and proposed transmission protocols over Rayleigh fading channels, respectively. Simulation results demonstrate that, with a guaranteed QoS of Net2, TCR transmissions can not only ensure continuous connections for the target user but achieve lower outage probabilities than traditional cases as well. In addition, it is shown that the outage probabilities of TCR transmissions can be minimized by optimizing the transmission time allocation.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/00189545
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Supplemental Notes:
- Abstract reprinted with permission of IEEE.
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Authors:
- Dai, Z
- Liu, J
- Wang, Chen
- Long, K
- Publication Date: 2015-7
Language
- English
Media Info
- Media Type: Web
- Pagination: pp 3030-3042
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Serial:
- IEEE Transactions on Vehicular Technology
- Volume: 64
- Issue Number: 7
- Publisher: Institute of Electrical and Electronics Engineers (IEEE)
- ISSN: 0018-9545
- Serial URL: http://ieeexplore.ieee.org/xpl/mostRecentIssue.jsp?punumber=25
Subject/Index Terms
- TRT Terms: Interference; Optimization; Quality of service; Simulation; Transmission; Wireless communication systems
- Subject Areas: Data and Information Technology; Highways; Planning and Forecasting; I72: Traffic and Transport Planning;
Filing Info
- Accession Number: 01574261
- Record Type: Publication
- Files: TRIS
- Created Date: Aug 27 2015 11:33AM