We propose a frame slotted ALOHA (FSA)-based protocol for a random access network where sources transmit status updates to their intended destinations. We evaluate the effect of such a protocol on the network's timeliness performance using the Age of Information (AoI) metric. Specifically, we leverage tools from stochastic geometry to model the spatial positions of the source-destination pairs and capture the entanglement amongst the nodes' spatial-temporal attributes through the interference they caused to each other. We derive analytical expressions for the average and variance of AoI over a typical transmission link in Poisson bipolar and cellular networks, respectively. Our analysis shows that in densely deployed networks, the FSA-based status updating protocol can significantly decrease the average AoI and in addition, stabilizes the age performance by substantially reducing the variance of AoI. Furthermore, under the same updating frequency, converting a slotted ALOHA protocol into an FSA-based one always leads to a reduction in the average AoI. Moreover, implementing FSA in conjunction with power control can further benefit the AoI performance, although the particular values of framesize and power control factor must be adequately tuned to achieve the optimal gain.
翻译:我们为随机访问网络提出了一个基于框架定档的ASLOHA(FSA)协议,其中信息来源将状态更新传送到预定目的地;我们利用信息时代的衡量标准评估这种协议对网络及时性效绩的影响;具体地说,我们利用从随机几何测量工具来模拟源源目的地配对的空间位置,通过相互干扰来捕捉节点空间时空属性之间的纠缠;我们分别对AoI对Poisson双极和蜂窝网络典型传输链路的平均值和差异进行分析表达;我们的分析表明,在密集部署的网络中,基于FSA的状况更新协议可以大幅降低平均AoI,此外,通过大幅降低AoI的差异来稳定年龄性能。此外,在同样更新的频率下,将已定档点的ALOHA协议转化为基于FA协议,总是导致平均AoI的下降。此外,实施FSA与权力控制相结合的典型连接可以进一步有利于AoI的功能性能,尽管一定的值必须达到最佳的增量系数。</s>