We analytically decide whether the broadcast transmission scheme or the distributed transmission scheme achieves the optimal age of information (AoI) performance of a multiuser system where a base station (BS) generates and transmits status updates to multiple user equipments (UEs). In the broadcast transmission scheme, the status update for all UEs is jointly encoded into a packet for transmission, while in the distributed transmission scheme, the status update for each UE is encoded individually and transmitted by following the round robin policy. For both transmission schemes, we examine three packet management strategies, namely the non-preemption strategy, the preemption in buffer strategy, and the preemption in serving strategy. We first derive new closed-form expressions for the average AoI achieved by two transmission schemes with three packet management strategies. Based on them, we compare the AoI performance of two transmission schemes in two systems, namely, the remote control system and the dynamic system. Aided by simulation results, we verify our analysis and investigate the impact of system parameters on the average AoI. For example, the distributed transmission scheme is more appropriate for the system with a large number UEs. Otherwise, the broadcast transmission scheme is more appropriate.
翻译:我们分析决定广播传输计划或分布式传输计划是否达到多用户系统信息(AoI)的最佳年龄,即一个基地台(BS)生成并向多个用户设备传输最新状态。在广播传输计划,所有电子数据的最新状态都被联合编码成供传输的包,而在分布式传输计划中,每个电子系统的最新状态是单独编码,并按圆轮刺杀政策传输。对这两种传输计划,我们检查三个组合管理战略,即非预防战略、缓冲战略中的先发制人和服务战略中的先发制人。我们首先为通过两个传输计划实现的平均AoI产生新的封闭式表达方式,同时采用三个组合管理战略。在此基础上,我们比较两个系统中两个传输计划(即遥控系统和动态系统)的AoI性能。根据模拟结果,我们核查我们的分析,并调查系统参数对平均AoI的影响。例如,分布式传输计划对系统更为适当,而使用大号传输计划。否则,分配式传输计划更适合。