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In this paper, we consider a hybrid user association (HUA) problem for load balancing of multitier cellular networks. The proposed hierarchical HUA approach builds on a combination of decentralized user association (DUA) and auxiliary intervention of a central control unit (CCU). A major challenge with the CCU intervention is the time interval determined by a selected CCU control cycle during which the DUA must accept all users that satisfy the prevailing association criterion while proactively mitigating potential resource depletions. Consequently, the primary focus of this work is on relating the control cycle of the CCU intervention with the incipient resource depletions, according to a maximum allowed resource depletion probability. By uniquely combining a set of mathematical tools from stochastic geometry and queueing theory, we present a novel HUA method which evaluates the association bias values of the DUA according to a CCU-optimized load vector and enables tier-based resource depletion probability provisioning over finite control cycles. The trade-offs between the proposed HUA method and the standard DUA approach are demonstrated via network simulations with flow-level spatiotemporal dynamics.
|Title of host publication||2019 IEEE 89th Vehicular Technology Conference, VTC Spring 2019|
|Publisher||IEEE Institute of Electrical and Electronic Engineers|
|Number of pages||6|
|Publication status||Published - 2019|
|MoE publication type||A4 Article in a conference publication|
|Event||89th IEEE Vehicular Technology Conference, VTC Spring 2019 - Kuala Lumpur, Malaysia|
Duration: 28 Apr 2019 → 1 May 2019
|Series||IEEE Vehicular Technology Conference Papers|
|Conference||89th IEEE Vehicular Technology Conference, VTC Spring 2019|
|Period||28/04/19 → 1/05/19|
- Load balancing
- Network heterogeneity
- Predictive congestion control
- Queueing theory
- Stochastic geometry
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- 1 Finished
5G-DRIVE: 5G HarmoniseD Research and TrIals for serVice Evolution between EU and China
Chen, T., Horsmanheimo, S., Tuomimäki, L., Chen, X., Zidbeck, J., Kutila, M., Kauvo, K., Mehnert, S., Pyykönen, P. & Jokela, M.
1/09/18 → 30/06/21
Project: EU project