The fifth-generation (5G) networks are expected to be able to satisfy users'different quality-of-service (QoS) requirements. Network slicing is a promisingtechnology for 5G networks to provide services tailored for users' specific QoSdemands. Driven by the increased massive wireless data traffic from differentapplication scenarios, efficient resource allocation schemes should beexploited to improve the flexibility of network resource allocation andcapacity of 5G networks based on network slicing. Due to the diversity of 5Gapplication scenarios, new mobility management schemes are greatly needed toguarantee seamless handover in network slicing based 5G systems. In thisarticle, we introduce a logical architecture for network slicing based 5Gsystems, and present a scheme for managing mobility between different accessnetworks, as well as a joint power and subchannel allocation scheme inspectrum-sharing two-tier systems based on network slicing, where both theco-tier interference and cross-tier interference are taken into account.Simulation results demonstrate that the proposed resource allocation scheme canflexibly allocate network resources between different slices in 5G systems.Finally, several open issues and challenges in network slicing based 5Gnetworks are discussed, including network reconstruction, network slicingmanagement and cooperation with other 5G technologies.
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