An Optimized Random Channel Access Policy in Cognitive Radio Networks under Packet Collision Requirement for Primary Users

التفاصيل البيبلوغرافية
العنوان: An Optimized Random Channel Access Policy in Cognitive Radio Networks under Packet Collision Requirement for Primary Users
المؤلفون: Gang Uk Hwang, Hyeon Je Cho
المصدر: IEEE Transactions on Wireless Communications. 12:6382-6391
بيانات النشر: Institute of Electrical and Electronics Engineers (IEEE), 2013.
سنة النشر: 2013
مصطلحات موضوعية: Optimization problem, Wireless network, Computer science, Wireless ad hoc network, business.industry, Stochastic process, Applied Mathematics, ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS, Throughput, Computer Science Applications, Computer Science::Performance, Cognitive radio, Channel state information, Computer Science::Networking and Internet Architecture, Electrical and Electronic Engineering, business, Computer Science::Information Theory, Communication channel, Computer network
الوصف: We consider a distributed random channel access policy in a cognitive radio network where multiple secondary users (SUs) contend for spectrum usage over available multiple primary user (PU) channels. In the random channel access policy each SU stochastically determines whether to access a channel based on the access probability (AP) which is adapted to the sensing results. It is then important to obtain the optimal AP values from the SUs' throughput performance perspective. In our analysis, we assume that all SUs acquire a common channel state information that is potentially erroneous. We analyze the throughput of an arbitrary SU and the packet collision probability of a PU due to the interference by SUs. By considering a requirement on the packet collision probability of a PU, we rigorously derive an explicit expression on the optimal AP values that maximize the throughput of an SU under the requirement for PUs. In the derivation we show that the multi-dimensional optimization problem with AP values can be converted into a one-dimensional optimization problem, so that the optimal AP values can be easily found. Numerical examples are provided to validate our analysis and to investigate the performance behavior of the optimal channel access policy.
تدمد: 1536-1276
URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_________::5cc3baad40aad0cd5df5df72513215dc
https://doi.org/10.1109/twc.2013.102413.130507
حقوق: CLOSED
رقم الأكسشن: edsair.doi...........5cc3baad40aad0cd5df5df72513215dc
قاعدة البيانات: OpenAIRE