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Resource Allocation with Dynamic Carrier Assignment in Wireless Networks

Wireless networks experience deficient transmission bandwidth and varying conditions in radio-link. Various technologies are combined to accomplish high data rate and quality of communication. This article describes the features of the proposed system based on 802.16 standard and orthogonal frequency division multiple access (OFDMA) with synergy of other advanced technologies. The system enables dynamic subcarriers allocation to users. Signal-to-noise ratio (SNR) per subcarriers is separately calculated for each user from the preambles. The resources are then allotted to users based on resource allocation algorithm (RAA) and required Quality of Service (QoS), defined for each type of data traffic. The proposed method performs adaptive modulation and coding with frequency hopping (FH). The results are compared to the existing RAA and subcarrier permutations. They show a more equitable allocation of available bandwidth among the users and greater system transmission capacity at lower bit error rate (BER).

adaptive modulation; frequency hopping; OFDMA; QoS; resource allocation; subcarrier scheduling

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