Efficient Resource Allocation for Multiclass Services in Multiuser OFDM Systems
作者： Jae Soong LEE , Jae Young LEE , Soobin LEE , Hwang Soo LEE
DOI: 10.1587/TRANSCOM.E92.B.533
关键词:
摘要: Although each application has its own quality of service (QoS) requirements, the resource allocation for multiclass services not been studied adequately in multiuser orthogonal frequency division multiplexing (OFDM) systems. In this paper, a total transmit power minimization problem downlink transmission is examined while satisfying consisting different data rates and target bit-error (BER). Lagrangian relaxation used to find an optimal subcarrier criterion context time-sharing by all users. We suggest iterative algorithm using upper lower bounds consumption. also propose prioritized (PSA) that provides low computation cost performance very close algorithm. The PSA employs selection order (SSO) decide which user takes best first over other SSO determined rates, channel gain, BER user. proposed algorithms are simulated various QoS parameters fading model. Furthermore, performed only but block (comprises several subcarriers). These extensive simulation environments provide more complete assessment algorithms. Simulation results show significantly outperform existing terms
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