The following information was submitted:
Transactions: WSEAS TRANSACTIONS ON COMMUNICATIONS
Transactions ID Number: 54-165
Full Name: Jian Zhang
Position: Student
Age: ON
Sex: Male
Address: P.O.Box 57.Nanjing University of Posts and Telecommunications.Xin Mofan Road
Country: CHINA
Tel: +8613605185797
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E-mail address: zhangjian.303@163.com
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Title of the Paper: A New Service Based Adaptive Resource Allocation Algorithm for OFDM Cognitive Radio Systems
Authors as they appear in the Paper: Jian Zhang, Qi Zhu
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Number of paper pages: 10
Abstract: In this paper, we study the resource allocation problem in multiuser orthogonal frequency division multiplexing (OFDM) based cognitive radio (CR) system. We maximum the transmission rate of non-real-time (NRT) service under the quality-of-service (QoS) requirement of real-time (RT) service, in order to maximize system capacity of secondary users. Thus, a dynamic resource allocation algorithm is proposed. This algorithm solves the optimization problem based on maximizing the total transmit bit rates of secondary users, on the one hand, the total transmit power of secondary users should below the transmit power constraint, on the other hand, the interference to primary users should under the maximum interference level. Firstly, we convert the QoS requirement of RT service to the rate requirement of RT secondary users (SUs), then, we allocate the bits and power adaptively based on the requirement of RT SUs. At last, the remaining resource is allocated to NRT SUs. Simu!
lation results show that the proposed algorithm can maximize the throughput of CR system and satisfy the QoS requirement of RT service with the interference constraint of every primary user (PU).
Keywords: Cognitive Radio (CR), Orthogonal Frequency Division Multiplexing (OFDM), Non Real Time (NRT), Real Time (RT), Resource Allocation (RA), Power Constraint, Interference Constraint.
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