This SpringerBrief investigates cross layer resource allocation in unlicensedLTE (Long Term Evolution) HetNets. Specifically, the authors study and cover the radio accessmanagement of unlicensed LTE to allow efficient spectrumutilization and harmonious coexistence with other unlicensedsystems in this brief. Efficient radio access protocols are developed to allowunlicensed LTE users to fair share channel access with unlicensedusers in different systems, including Wi-Fi and unlicensed LTE ofother operators. An analytical model is developed to study theperformance of the proposed protocols.
To achieve efficient spectrum sharing among various unlicensed users, the authors further formulate a resource allocation problem based on Nobel Prizewinning game theory framework, and propose efficient algorithmsto achieve the maximal user utility. Opportunistic traffic offloadingfrom licensed band to unlicensed bands is also investigated, basedon the network formation game. By exploiting the characteristics ofmobile social networks, the offloading performance can be furtherenhanced.
This brief targets researchers and engineers from both academia and industryinterested in the development of LTE over unlicensed bands,as well as the design and implementation of cross layer radio resource management.Students studying electrical engineering and computer science will also find this brief useful for their studies.

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