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首页> 外文期刊>Wireless Communications, IEEE Transactions on >Throughput-Delay-Reliability Tradeoff with ARQ in Wireless Ad Hoc Networks
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Throughput-Delay-Reliability Tradeoff with ARQ in Wireless Ad Hoc Networks

机译：无线Ad Hoc网络中使用ARQ进行吞吐量-延迟-可靠性的权衡

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摘要

Delay-reliability (D-R), and throughput-delay-reliability (T-D-R) tradeoffs in an ad hoc network are derived for single hop and multi-hop transmission with automatic repeat request (ARQ) on each hop. The delay constraint is modeled by assuming that each packet is allowed at most D retransmissions end-to-end, and the reliability is defined as the probability that the packet is successfully decoded in at most D retransmissions. The throughput of the ad hoc network is characterized by the transmission capacity, where the transmission capacity is defined to be the maximum density of spatial transmissions that can be simultaneously supported in an ad hoc network under quality of service (QoS) constraints (maximum retransmissions and reliability). The transmission capacity captures the T-D-R tradeoff as it incorporates the dependence between the throughput, the maximum delay, and the reliability. Given an end-to-end retransmission constraint of D, the optimal allocation of the number of retransmissions allowed at each hop is derived that maximizes a lower bound on the transmission capacity. Optimizing over the number of hops, single hop transmission is shown to be optimal for maximizing a lower bound on the transmission capacity in the sparse network regime.
机译：得出ad hoc网络中的延迟可靠性（D-R）和吞吐量延迟可靠性（T-D-R）权衡，以用于单跳和多跳传输，并在每个跳上进行自动重复请求（ARQ）。通过假设每个数据包端到端最多允许D个重传来对延迟约束进行建模，并将可靠性定义为在最多D个重传中成功解码该数据包的概率。 ad hoc网络的吞吐量以传输容量为特征，其中传输容量定义为在服务质量（QoS）约束下，ad hoc网络中可以同时支持的最大空间传输密度（最大重传和可靠性）。传输容量包含了吞吐量，最大延迟和可靠性之间的依赖关系，因此可以捕获T-D-R的折衷。给定D的端到端重传约束，则得出在每个跃点上允许的重传次数的最佳分配，从而使传输容量的下限最大化。在跳数上进行优化，单跳传输被证明是最佳的，用于在稀疏网络状态下最大化传输容量的下限。

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