Controller Placement in Wireless Networks With Delayed CSI
Author(s)Johnston, Matthew Ryan; Modiano, Eytan H
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We consider the impact of delayed state information on the performance of centralized wireless scheduling algorithms. Since state updates must be collected from throughout the network, they are inevitably delayed, and this delay is proportional to the distance of each respective node to the controller. In this paper, we analyze the optimal controller placement resulting from this delayed state information. We propose a dynamic controller placement framework, in which the controller is relocated using delayed queue length information at each node, and transmissions are scheduled based on channel and queue length information. We characterize the throughput region under such policies, and find a policy that stabilizes the system for all arrival rates within the throughput region.
DepartmentMassachusetts Institute of Technology. Department of Aeronautics and Astronautics; Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Laboratory for Information and Decision Systems
IEEE/ACM Transactions on Networking
Institute of Electrical and Electronics Engineers (IEEE)
Johnston, Matthew, and Eytan Modiano. “Controller Placement in Wireless Networks With Delayed CSI.” IEEE/ACM Transactions on Networking 25, no. 3 (June 2017): 1775–1788.
Author's final manuscript