Age of Information and Throughput in a Shared Access Network with Heterogeneous Traffic
Age of Information and Throughput in a Shared Access Network with Heterogeneous Traffic
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DOI：
10.1109/glocom.2018.8647212
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发表时间：
2018-06
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影响因子：
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通讯作者：
Antzela Kosta;N. Pappas;A. Ephremides;Vangelis Angelakis
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作者：
Antzela Kosta;N. Pappas;A. Ephremides;Vangelis Angelakis
我们考虑一种认知共享访问方案，该方案由一个高优先级主节点和一个低优先级网络组成，其中 N 个辅助节点访问频谱。假设主节点的突发流量、辅助节点的队列饱和以及接收器的多包接收能力，我们推导出主节点的信息的时间平均年龄和辅助节点的吞吐量的解析表达式。我们制定了两个优化问题，第一个目标是根据聚合辅助吞吐量要求最小化主节点信息的时间平均寿命。第二个问题旨在最大化受最大时间平均陈旧性约束影响的网络的总体辅助吞吐量。我们的结果为具有多数据包接收能力的多址系统的设计提供了指导，该系统可以满足及时性和吞吐量的要求。
We consider a cognitive shared access scheme consisting of a high priority primary node and a low priority network with N secondary nodes accessing the spectrum. Assuming bursty traffic at the primary node, saturated queues at the secondary nodes, and multipacket reception capabilities at the receivers, we derive analytical expressions of the time average age of information of the primary node and the throughput of the secondary nodes. We formulate two optimization problems, the first aiming to minimize the time average age of information of the primary node subject to an aggregate secondary throughput requirement. The second problem aims to maximize the aggregate secondary throughput of the network subject to a maximum time average staleness constraint. Our results provide guidelines for the design of a multiple access system with multipacket reception capabilities that fulfills both timeliness and throughput requirements.