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Resource Allocation in Virtualized CoMP-NOMA HetNets Multi-Connectivity for Joint Transmission

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Document pages: 54 pages

Abstract: In this work, we design a generalized joint transmission coordinatedmulti-point (JT-CoMP)-non-orthogonal multiple access (NOMA) model for avirtualized multi-infrastructure network. In this model, all users benefit frommultiple joint transmissions of CoMP thanks to the multi-connectivityopportunity provided by wireless network virtualization (WNV) inmulti-infrastructure networks. The NOMA protocol in CoMP results in anunlimited NOMA clustering (UNC) scheme, where the order of each NOMA cluster isthe maximum possible value. We show that UNC results in maximum successfulinterference cancellation (SIC) complexity at users. In this regard, we proposea limited NOMA clustering (LNC) scheme, where the SIC is performed to only asubset of users. We formulate the problem of joint power allocation and userassociation for the UNC and LNC schemes. Then, one globally and one locallyoptimal solution are proposed for each problem based on mixed-integer monotonicoptimization and sequential programming, respectively. Numerical assessmentsreveal that WNV and LNC improves users sum-rate and reduces users SICcomplexity by up to $35 $ and $46 $ compared to the non-virtualized CoMP-NOMAsystem and UNC model, respectively. Therefore, the proposed algorithms aresuitable candidates for the implementation on open and intelligent radio accessnetworks.

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