论文标题
通过自适应数据包编码对信息时代的强大改善
Robust Improvement of the Age of Information by Adaptive Packet Coding
论文作者
论文摘要
我们考虑一个具有自适应方案的无线通信网络，以选择为每个传输的要接收和编码的数据包数，并表征信息及时性。对于擦除通道和离散时间的网络，我们为信息的平均年龄和峰值年龄（AOI）提供了封闭形式表达式作为入学控制和自适应编码参数的函数，反馈延迟以及最大可行的端到端端率取决于信道条件和网络拓扑。这些新结果指导系统设计在存在拓扑和渠道变化的情况下传输时间敏感信息时，AOI的强大改进。我们说明了使用自适应数据包编码来提高信息及时性的好处，通过表征与AOI的网络性能以及其与吞吐量的关系（目的地成功解码数据包的速率）和每个包装延迟。我们表明，与未编码的情况相比，可以获得显着的AOI性能提高，并且随着渠道条件和网络拓扑变化，这些收益对网络变化是可靠的。
We consider a wireless communication network with an adaptive scheme to select the number of packets to be admitted and encoded for each transmission, and characterize the information timeliness. For a network of erasure channels and discrete time, we provide closed form expressions for the Average and Peak Age of Information (AoI) as functions of admission control and adaptive coding parameters, the feedback delay, and the maximum feasible end-to-end rate that depends on channel conditions and network topology. These new results guide the system design for robust improvements of the AoI when transmitting time sensitive information in the presence of topology and channel changes. We illustrate the benefits of using adaptive packet coding to improve information timeliness by characterizing the network performance with respect to the AoI along with its relationship to throughput (rate of successfully decoded packets at the destination) and per-packet delay. We show that significant AoI performance gains can be obtained in comparison to the uncoded case, and that these gains are robust to network variations as channel conditions and network topology change.
