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المؤلفMa, Songjun
المؤلفPeng, Yunfeng
المؤلفWang, Tao
المؤلفGan, Xiaoying
المؤلفYang, Feng
المؤلفWang, Xinbing
المؤلفGuizani, Mohsen
تاريخ الإتاحة2022-11-10T09:47:26Z
تاريخ النشر2014
اسم المنشور2014 IEEE International Conference on Communications, ICC 2014
المصدرScopus
المصدر2-s2.0-84906996562
معرّف المصادر الموحدhttp://dx.doi.org/10.1109/ICC.2014.6884103
معرّف المصادر الموحدhttp://hdl.handle.net/10576/36177
الملخصRecently, security of cognitive radio (CR) is becoming a severe issue. There is one kind of threat, which we call greedy spectrum occupancy threat (GSOT) in this paper, has long been ignored in previous work. In GSOT, a secondary user may selfishly occupy the spectrum for a long time, which makes other users suffer additional waiting time in queue to access the spectrum and leads to congestion or breakdown. In this paper, a queueing model is established to describe the system with greedy secondary user (GSU). Based on this model, the impacts of GSU on the system are evaluated. Numerical results indicate that the steady-state performance of the system is influenced not only by average occupancy time, but also by the number of users as well as number of channels. Since a sudden change in average occupancy time of GSU will produce dramatic performance degradation, the greedy second user prefers to increase its occupancy time in a gradual manner in case it is detected easily. Once it reaches its targeted occupancy time, the system will be in steady state, and the performance will be degraded. In order to detect such a cunning behavior as quickly as possible, we propose a wavelet based detection approach. Simulation results are presented to demonstrate the effectiveness and quickness of the proposed approach. 2014 IEEE.
اللغةen
الناشرIEEE Computer Society
الموضوعComputer simulation
Queueing theory
Wavelet analysis
Cognitive radio network
Numerical results
Performance degradation
Queueing model
Secondary users
Spectrum occupancies
Steady state performance
Wavelet based detection
Cognitive radio
العنوانDetecting the greedy spectrum occupancy threat in cognitive radio networks
النوعConference Paper
الصفحات4939-4944
dc.accessType Abstract Only


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