Cooperative Transmission in Cognitive Radio Ad Hoc Networks
نویسندگان
چکیده
منابع مشابه
Routing in Cognitive Radio Ad-Hoc Networks
Cognitive Radio (CR) mitigates the problem of inefficient spectrum usage. Cognitive radio is based on Dynamic Spectrum Access (DSA), through which unlicensed users can use the licensed spectrum band without causing harmful interference to the licensed users. However, this dynamic spectrum access increases designing of communication protocols in different layers. In this paper, I have presented ...
متن کاملCRAHNs: Cognitive radio ad hoc networks
Cognitive radio (CR) technology is envisaged to solve the problems in wireless networks resulting from the limited available spectrum and the inefficiency in the spectrum usage by exploiting the existing wireless spectrum opportunistically. CR networks, equipped with the intrinsic capabilities of the cognitive radio, will provide an ultimate spectrumaware communication paradigm in wireless comm...
متن کاملReinforcement learning for cooperative sensing gain in cognitive radio ad hoc networks
Spectrum sensing is a fundamental function in cognitive radio networks for detecting the presence of primary users in licensed bands. The detection performance may be considerably compromised due to multipath fading and shadowing. To resolve this issue, cooperative sensing is an effective approach to combat channel impairments by cooperation of secondary users. This approach, however, incurs ov...
متن کاملCooperative Spectrum Sensing with Optimal Sensing Ranges in Cognitive Radio Ad-Hoc Networks
Cognitive radio has been proposed as an innovative and effective technology to exploit the efficient reuse of the precious radio spectrum. In spectrum sensing which is a crucial step in cognitive radio networks, an adequate sensing range needs to be defined to prevent the hidden transmitter/receiver problems. Moreover, a secondary user may have unreliable detection of the existent primary users...
متن کاملReinforcement Learning for Routing in Cognitive Radio Ad Hoc Networks
Cognitive radio (CR) enables unlicensed users (or secondary users, SUs) to sense for and exploit underutilized licensed spectrum owned by the licensed users (or primary users, PUs). Reinforcement learning (RL) is an artificial intelligence approach that enables a node to observe, learn, and make appropriate decisions on action selection in order to maximize network performance. Routing enables ...
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ژورنال
عنوان ژورنال: International Journal of Distributed Sensor Networks
سال: 2012
ISSN: 1550-1477,1550-1477
DOI: 10.1155/2012/863634