On the performance of adaptive relaying with ARQ
On the performance of adaptive relaying with ARQ
复制标题
ARQ自适应中继的性能研究
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
V. Kühn
中科院分区：
文献类型：
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作者：
Aimal Khan;V. Kühn
自适应中继通过根据接收信号的可靠性切换转发技术，显著提高了中继网络的性能。在没有ARQ的自适应中继中，无论目的地的解码状态如何，所有中继都会转发。这导致资源利用效率低下。在ARQ中继网络中，消息在来自目的地的请求时被重复。在本文中，我们将ARQ结合到自适应中继方案中，以突出自适应与ARQ相结合所获得的增益。此外，与转发所有中继不同，只有确保在目的地成功解码的最小可能数量的中继才参与转发。考虑了不同的自适应中继方案。确定了端到端性能和中继器选择标准。最后，数值计算了有ARQ和无ARQ时不同自适应方案的中断概率和吞吐量。结果表明，由于有效的资源分配和ARQ，自适应中继在中断和吞吐量方面比非ARQ中继具有更好的性能。
Adaptive relaying schemes significantly improve the performance of relay networks by switching the forwarding technique according to the reliability of the received signal. In adaptive relaying without ARQ all the relays forward irrespective of the decoding status at the destination. This leads to inefficient resource utilization. In ARQ relay networks, the message is repeated upon the request from the destination. In this paper we incorporate ARQ into the adaptive relaying schemes to highlight the gains obtained by using adaptability in conjunction with ARQ. Furthermore, instead of all relays forwarding, only the minimum possible number of relays which ensure successful decoding at the destination participate in forwarding. Different adaptive relaying schemes are taken into consideration. The end-to-end performance and relay selection criteria are determined. Finally, outage probability and throughput of different adaptive schemes with and without ARQ are calculated numerically. The results show that due to the efficient resource allocation and ARQ, adaptive relaying delivers superb performance over the non-ARQ counterpart regarding outage as well as throughput.