- Title
- Orchestrating resource management in LTE-unlicensed systems with backhaul link constraints
- Creator
- LeAnh, Tuan; Tran, Nguyen H.; Ngo, Duy Trong; Han, Zhu; Hong, Choong Seon
- Relation
- IEEE Transactions on Wireless Communications Vol. 18, Issue 2, p. 1360-1375
- Publisher Link
- http://dx.doi.org/10.1109/TWC.2019.2892431
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- journal article
- Date
- 2019
- Description
- Long term evolution (LTE)-unlicensed, an extension of LTE Advanced to unlicensed spectrum, can provide high performance and seamless user experience. To reap the full benefits of the LTE-unlicensed deployment, efficient resource allocation and interference management are critical to ensuring a harmonious coexistence between LTE-unlicensed and WiFi systems. In this paper, we study a resource orchestration scheme for an LTE-unlicensed network where small cells share the same unlicensed spectrum with a WiFi system. An optimization problem for channel and power allocations is formulated to maximize the overall network utility, which is an NP-hard problem. The problem is constrained on meeting the desired data rate demands of the served small-cell users, the capacity-limited backhaul links, and the maximum tolerable interference at the WiFi access point. To solve this challenging problem, a distributed solution based on Lagrangian relaxation is proposed to assist the LTE-unlicensed network in making decisions on channel allocation and transmit power. Furthermore, low-complexity solutions are devised upon applying the one-To-one matching game theory. The simulation results with practical parameter settings show that the proposed algorithms converge to the suboptimal solution after a small number of iterations in the considered examples.
- Subject
- dual decomposition; matching theory; LTE-unlicensed; resource allocation
- Identifier
- http://hdl.handle.net/1959.13/1467610
- Identifier
- uon:47858
- Identifier
- ISSN:1536-1276
- Language
- eng
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