[PDF] Top 20 Throughput Maximization Based on Optimal Access Probabilities in Cognitive Radio System

... nitive radio technique promises to improve the low ...optimized access strategy com- bining overlay scheme and underlay scheme for the cognitive ...the system as a con- tinuous-time Markov ... See full document

... a cognitive radio system with one primary channel and one secondary user, and then we introduce a channel-usage pattern model and a fundamental access scheme in this ...system. ... See full document

... of system on performance of the system by using a Markov chain model, which will be introduced in part B in ...the system adjusts its serving rate according to the current channel state information ... See full document

... communication system, radio resources can be effectively reused by cognitive radio networks (CRNs), where a lot of secondary users (SUs) are able to access the spectrum of primary users ... See full document

... In this paper, for a OFDMA based CR system that uses a JOUSAM, we have developed an optimal subcarrier and power allocation algorithm. In this the total transmission rate for CR users for a ... See full document

... [13] proposes binary time series approach for spectrum hole prediction. For a slotted LBT scheme, at a particular time, the slot is either busy or idle. CR can keep track of past data for prediction. Auto Regressive ... See full document

... the radio resource to spectrum broker and also users where users may be primary, secondary, or ...for radio resource ...spectrum access of secondary user and the network is divided into cooperative ... See full document

... (TVWS). Cognitive radio (CR) has been considered as a powerful technique to increase the spectral efficiency by enabling unlicensed secondary users to access underutilized spectrum ...involve ... See full document

... wireless system field because it pro- vides a solution to optimize the system parameters by learning the surrounding environment in a dynamic and complicated wireless environment ...the access point ... See full document

... In this section, we present an iterative power allocation scheme (IPAS) to solve the optimization problem. The proposed algorithm is based on ε-optimal algorithm. Therefore, for any ε > 0, ... See full document

... unlicensed access to the TV spectrum without interference, as described in the IEEE ...for cognitive radio ...for cognitive radio ...be throughput optimal) [9] if it ... See full document

... average throughput of the secondary system within K time slots, where the maximum transmission power constraint, the interference power constraint, and the minimum through- put constraint are ...The ... See full document

... Cognitive Radio(CR) is one kind of intelligent wireless device, which is able to adjust its transmission parameters, such as transmit power and transmission frequency band, based on the environment ... See full document

... resulting probabilities of detection and false alarm of a coalition head becomes the probabilities of detection and false alarm of each CR i that is the member of ... See full document

... a system with cell based control each BS keeps information about the current available channels in its ...channel based on its local CIR measurements without the involvement of a central call ... See full document

... an optimal config- uration strategy that minimizes energy consumption for within such ...against throughput optimization, this way assessing the price to ... See full document

... mechanism based on the cognitive radio technol- ...an optimal power allocation scheme in this scenario which holds the characteristics of achieving the maximum system utility and ... See full document

... The transmission model for every CR user is shown in Figure 1. At the data link layer, for the transmission capacity analysis, the infinite bu ff er of the transmitter is assumed to be continually backlogged with packets ... See full document

... selected based on the SINR and received signal power according to Table 1. In our simulations, we assumed there were no sources of interference outside the net- work. With DumbAgent as routing protocol, we found ... See full document

... PSO is a population based optimization technique which is inspired by social be- havior of flock of birds or school of fish. In PSO, there are swarm particles which reside at a position in search space. Initially ... See full document