论文标题
具有源吸引数据包管理的多源系统中的平均AOI
Average AoI in Multi-Source Systems with Source-Aware Packet Management
论文作者
论文摘要
我们在状态更新系统中研究了三个不同的源知识数据包管理策略下的信息新鲜度，该系统由两个独立来源和一台服务器组成。每个源的数据包是根据泊松过程生成的，并且数据包是根据指数分布的服务时间提供的。我们使用随机混合系统（SHS）技术为每个数据包管理策略得出每个来源的信息年龄（AOI）的平均年龄。在策略1中，队列最多可以同时包含两个等待数据包（除了使用中的数据包外），一包源1和一包源2包。在策略2中，系统（即等待队列和服务器）最多可以包含两个数据包，一个来自每个源。当服务器到达数据包时忙碌时，系统中相同源的可能数据包被新鲜数据包取代。策略3类似于政策2，但不允许在服务中进行先发制人，即，当包装量正在使用时，来自同一来源的所有新来者都将被阻止和清除。提供数值结果来评估拟议策略的来源和总和AOI之间的公平性。
We study the information freshness under three different source aware packet management policies in a status update system consisting of two independent sources and one server. The packets of each source are generated according to the Poisson process and the packets are served according to an exponentially distributed service time. We derive the average age of information (AoI) of each source using the stochastic hybrid systems (SHS) technique for each packet management policy. In Policy 1, the queue can contain at most two waiting packets at the same time (in addition to the packet under service), one packet of source 1 and one packet of source 2. When the server is busy at an arrival of a packet, the possible packet of the same source waiting in the queue (hence, source-aware) is replaced by the arrived fresh packet. In Policy 2, the system (i.e., the waiting queue and the server) can contain at most two packets, one from each source. When the server is busy at an arrival of a packet, the possible packet of the same source in the system is replaced by the fresh packet. Policy 3 is similar to Policy 2 but it does not permit preemption in service, i.e., while a packet is under service all new arrivals from the same source are blocked and cleared. Numerical results are provided to assess the fairness between sources and the sum average AoI of the proposed policies.
