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
A cooperação pode aumentar o desempenho do sistema através da obtenção da diversidade espacial. Embora a maioria dos presentes trabalhos se concentre na análise da cooperação baseada na resposta do canal interusuário e no desenvolvimento de um esquema para maior diversidade cooperativa, neste artigo nos concentramos na alocação prática de recursos em sistemas OFDMA. Como o usuário que utiliza a mesma frequência central não pode receber o sinal durante a transmissão, esta restrição deve ser considerada para aplicar a cooperação aos sistemas OFDMA. Neste artigo, propomos a estrutura de quadros OFDMA baseada em pares que supera essa restrição. Também nesta estrutura de quadros, para atingir a probabilidade mínima de interrupção do sistema, selecionamos o melhor parceiro entre os vizinhos candidatos e alocamos os subcanais adequados para a largura de banda solicitada pelos usuários através de um algoritmo cooperativo de alocação de subcanais (CSA). Para avaliar o esquema de alocação de recursos proposto, realizamos simulações baseadas no IEEE 802.16e. Os resultados da simulação mostram que nosso algoritmo proposto oferece menor probabilidade de interrupção do que aquele baseado em comunicações não cooperativas e obtemos a probabilidade mínima de interrupção quando o limite para seleção de vizinhos candidatos é de 10 dB. Analisamos que esses resultados podem ser alcançados ajudando os usuários localizados nas bordas da célula.
The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.
Copiar
Junwoo JUNG, Hyungwon PARK, Jae-Sung LIM, "An Efficient Radio Resource Allocation Scheme for Minimum Outage Probability Using Cooperation in OFDMA Systems" in IEICE TRANSACTIONS on Communications,
vol. E91-B, no. 7, pp. 2321-2330, July 2008, doi: 10.1093/ietcom/e91-b.7.2321.
Abstract: Cooperation can increase the system performance by obtaining the spatial diversity. While most of the present works concentrate on the analysis of the cooperation based on the inter-user channel response and developing a scheme for higher cooperative diversity, in this paper, we focus on practical resource allocation in OFDMA systems. Since the user who uses the same center frequency can not receive the signal when transmitting, this constraint should be considered to apply the cooperation to OFDMA systems. In this paper, we propose the pair-based OFDMA frame structure that overcomes this constraint. Also in this frame structure to achieve the minimum outage probability of system, we select the best partner among the candidate neighbors and allocate the suitable subchannels to bandwidth requested users through a cooperative subchannel allocation (CSA) algorithm. In order to evaluate the proposed resource allocation scheme, we carry out simulations based on IEEE 802.16e. The simulation results show that our proposed algorithm offers smaller outage probability than one based on non-cooperative communications and we get the minimum outage probability when a threshold for selection of candidate neighbors is 10 dB. We analyze that these results can be achieved by helping users located around the edge of the cell.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e91-b.7.2321/_p
Copiar
@ARTICLE{e91-b_7_2321,
author={Junwoo JUNG, Hyungwon PARK, Jae-Sung LIM, },
journal={IEICE TRANSACTIONS on Communications},
title={An Efficient Radio Resource Allocation Scheme for Minimum Outage Probability Using Cooperation in OFDMA Systems},
year={2008},
volume={E91-B},
number={7},
pages={2321-2330},
abstract={Cooperation can increase the system performance by obtaining the spatial diversity. While most of the present works concentrate on the analysis of the cooperation based on the inter-user channel response and developing a scheme for higher cooperative diversity, in this paper, we focus on practical resource allocation in OFDMA systems. Since the user who uses the same center frequency can not receive the signal when transmitting, this constraint should be considered to apply the cooperation to OFDMA systems. In this paper, we propose the pair-based OFDMA frame structure that overcomes this constraint. Also in this frame structure to achieve the minimum outage probability of system, we select the best partner among the candidate neighbors and allocate the suitable subchannels to bandwidth requested users through a cooperative subchannel allocation (CSA) algorithm. In order to evaluate the proposed resource allocation scheme, we carry out simulations based on IEEE 802.16e. The simulation results show that our proposed algorithm offers smaller outage probability than one based on non-cooperative communications and we get the minimum outage probability when a threshold for selection of candidate neighbors is 10 dB. We analyze that these results can be achieved by helping users located around the edge of the cell.},
keywords={},
doi={10.1093/ietcom/e91-b.7.2321},
ISSN={1745-1345},
month={July},}
Copiar
TY - JOUR
TI - An Efficient Radio Resource Allocation Scheme for Minimum Outage Probability Using Cooperation in OFDMA Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 2321
EP - 2330
AU - Junwoo JUNG
AU - Hyungwon PARK
AU - Jae-Sung LIM
PY - 2008
DO - 10.1093/ietcom/e91-b.7.2321
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E91-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2008
AB - Cooperation can increase the system performance by obtaining the spatial diversity. While most of the present works concentrate on the analysis of the cooperation based on the inter-user channel response and developing a scheme for higher cooperative diversity, in this paper, we focus on practical resource allocation in OFDMA systems. Since the user who uses the same center frequency can not receive the signal when transmitting, this constraint should be considered to apply the cooperation to OFDMA systems. In this paper, we propose the pair-based OFDMA frame structure that overcomes this constraint. Also in this frame structure to achieve the minimum outage probability of system, we select the best partner among the candidate neighbors and allocate the suitable subchannels to bandwidth requested users through a cooperative subchannel allocation (CSA) algorithm. In order to evaluate the proposed resource allocation scheme, we carry out simulations based on IEEE 802.16e. The simulation results show that our proposed algorithm offers smaller outage probability than one based on non-cooperative communications and we get the minimum outage probability when a threshold for selection of candidate neighbors is 10 dB. We analyze that these results can be achieved by helping users located around the edge of the cell.
ER -