Dual Connectivity Enabled User Association Approach for Max-Throughput in the Downlink Heterogeneous Network

摘要: The architecture of dual connectivity (DC) allows each user's equipment to simultaneously communicate with a macro and small cell via two different radio-interfaces. User association (UA) DC is considerably more challenging than traditional single one, because user must be associated the best combination serving cell. This paper focuses on proposes an efficient DC-enabled UA approach maximize overall system throughput for downlink wireless heterogeneous network (HetNet). In this approach, we formulate it as non-linear integer optimization problem in sum-of-ratios form. Since formulated non-deterministic polynomial hard (NP-hard), achieve its optimal solutions. To end, relaxed then transformed into tractable form, which can solved iteratively obtain solution. Numerical results show that, compared existing methods, proposed algorithm enhance improve offloading performance cells.