The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Walaupun setiap aplikasi mempunyai keperluan kualiti perkhidmatan (QoS) sendiri, peruntukan sumber untuk perkhidmatan berbilang kelas belum dikaji secukupnya dalam sistem pemultipleksan bahagian frekuensi ortogonal berbilang pengguna (OFDM). Dalam makalah ini, masalah pengecilan kuasa penghantaran total untuk penghantaran pautan bawah dikaji sambil memuaskan perkhidmatan berbilang kelas yang terdiri daripada kadar data yang berbeza dan kadar ralat bit sasaran (BER). Kelonggaran Lagrangian digunakan untuk mencari kriteria peruntukan subcarrier yang optimum dalam konteks perkongsian masa subcarrier oleh semua pengguna. Kami mencadangkan algoritma berulang menggunakan kriteria ini untuk mencari sempadan atas dan bawah penggunaan kuasa optimum. Kami juga mencadangkan algoritma peruntukan subcarrier (PSA) yang diutamakan yang menyediakan kos pengiraan rendah dan prestasi yang hampir sama dengan algoritma lelaran. Algoritma PSA menggunakan perintah pemilihan subcarrier (SSO) untuk menentukan pengguna mana yang mengambil subcarrier terbaiknya terlebih dahulu berbanding pengguna lain. SSO ditentukan oleh kadar data, keuntungan saluran dan BER sasaran setiap pengguna. Algoritma yang dicadangkan disimulasikan dalam pelbagai parameter QoS dan model saluran pudar. Tambahan pula, peruntukan sumber dilakukan bukan sahaja subpembawa oleh subpembawa tetapi juga blok frekuensi demi blok frekuensi (terdiri daripada beberapa subpembawa). Persekitaran simulasi yang meluas ini memberikan penilaian yang lebih lengkap tentang algoritma yang dicadangkan. Keputusan simulasi menunjukkan bahawa algoritma yang dicadangkan dengan ketara mengatasi algoritma sedia ada dari segi jumlah penggunaan kuasa penghantaran.
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Salinan
Jae Soong LEE, Jae Young LEE, Soobin LEE, Hwang Soo LEE, "Efficient Resource Allocation for Multiclass Services in Multiuser OFDM Systems" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 2, pp. 533-543, February 2009, doi: 10.1587/transcom.E92.B.533.
Abstract: Although each application has its own quality of service (QoS) requirements, the resource allocation for multiclass services has not been studied adequately in multiuser orthogonal frequency division multiplexing (OFDM) systems. In this paper, a total transmit power minimization problem for downlink transmission is examined while satisfying multiclass services consisting of different data rates and target bit-error rates (BER). Lagrangian relaxation is used to find an optimal subcarrier allocation criterion in the context of subcarrier time-sharing by all users. We suggest an iterative algorithm using this criterion to find the upper and lower bounds of optimal power consumption. We also propose a prioritized subcarrier allocation (PSA) algorithm that provides low computation cost and performance very close to that of the iterative algorithm. The PSA algorithm employs subcarrier selection order (SSO) in order to decide which user takes its best subcarrier first over other users. The SSO is determined by the data rates, channel gain, and target BER of each user. The proposed algorithms are simulated in various QoS parameters and the fading channel model. Furthermore, resource allocation is performed not only subcarrier by subcarrier but also frequency block by frequency block (comprises several subcarriers). These extensive simulation environments provide a more complete assessment of the proposed algorithms. Simulation results show that the proposed algorithms significantly outperform existing algorithms in terms of total transmit power consumption.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.533/_p
Salinan
@ARTICLE{e92-b_2_533,
author={Jae Soong LEE, Jae Young LEE, Soobin LEE, Hwang Soo LEE, },
journal={IEICE TRANSACTIONS on Communications},
title={Efficient Resource Allocation for Multiclass Services in Multiuser OFDM Systems},
year={2009},
volume={E92-B},
number={2},
pages={533-543},
abstract={Although each application has its own quality of service (QoS) requirements, the resource allocation for multiclass services has not been studied adequately in multiuser orthogonal frequency division multiplexing (OFDM) systems. In this paper, a total transmit power minimization problem for downlink transmission is examined while satisfying multiclass services consisting of different data rates and target bit-error rates (BER). Lagrangian relaxation is used to find an optimal subcarrier allocation criterion in the context of subcarrier time-sharing by all users. We suggest an iterative algorithm using this criterion to find the upper and lower bounds of optimal power consumption. We also propose a prioritized subcarrier allocation (PSA) algorithm that provides low computation cost and performance very close to that of the iterative algorithm. The PSA algorithm employs subcarrier selection order (SSO) in order to decide which user takes its best subcarrier first over other users. The SSO is determined by the data rates, channel gain, and target BER of each user. The proposed algorithms are simulated in various QoS parameters and the fading channel model. Furthermore, resource allocation is performed not only subcarrier by subcarrier but also frequency block by frequency block (comprises several subcarriers). These extensive simulation environments provide a more complete assessment of the proposed algorithms. Simulation results show that the proposed algorithms significantly outperform existing algorithms in terms of total transmit power consumption.},
keywords={},
doi={10.1587/transcom.E92.B.533},
ISSN={1745-1345},
month={February},}
Salinan
TY - JOUR
TI - Efficient Resource Allocation for Multiclass Services in Multiuser OFDM Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 533
EP - 543
AU - Jae Soong LEE
AU - Jae Young LEE
AU - Soobin LEE
AU - Hwang Soo LEE
PY - 2009
DO - 10.1587/transcom.E92.B.533
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 2
JA - IEICE TRANSACTIONS on Communications
Y1 - February 2009
AB - Although each application has its own quality of service (QoS) requirements, the resource allocation for multiclass services has not been studied adequately in multiuser orthogonal frequency division multiplexing (OFDM) systems. In this paper, a total transmit power minimization problem for downlink transmission is examined while satisfying multiclass services consisting of different data rates and target bit-error rates (BER). Lagrangian relaxation is used to find an optimal subcarrier allocation criterion in the context of subcarrier time-sharing by all users. We suggest an iterative algorithm using this criterion to find the upper and lower bounds of optimal power consumption. We also propose a prioritized subcarrier allocation (PSA) algorithm that provides low computation cost and performance very close to that of the iterative algorithm. The PSA algorithm employs subcarrier selection order (SSO) in order to decide which user takes its best subcarrier first over other users. The SSO is determined by the data rates, channel gain, and target BER of each user. The proposed algorithms are simulated in various QoS parameters and the fading channel model. Furthermore, resource allocation is performed not only subcarrier by subcarrier but also frequency block by frequency block (comprises several subcarriers). These extensive simulation environments provide a more complete assessment of the proposed algorithms. Simulation results show that the proposed algorithms significantly outperform existing algorithms in terms of total transmit power consumption.
ER -