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Dynamic SPectrum Sharing in 5G

Dynamic spectrum sharing in 5G NR for massive MIMO systems is a novel approach to increase the capacity of a shared spectrum. With dynamic spectrum sharing, multiple heterogeneous operators jointly share a single spectrum resource through joint interference management, monitoring, and scheduling. The approach is based on the assumption that mobile users will come and go throughout the day, thus leading to dynamically changing network environments with different demands at different times of the day. This necessitates dynamic scaling of resources such as antennas, amplifiers and transmitters. In the 5G NR standards, dynamic spectrum sharing (DSS) plays an important role in providing spectrum opportunities to different services and users. This technical note describes use cases and components of DSS in 5G NR, as well as differences between traditional DSS and its application in 5G NR. The 5G NR dynamic spectrum sharing feature enables the transmission of multiple non-interfering communications services in the same or adjacent frequency bands.The 5G NR dynamic spectrum sharing feature is a key element in supporting multi-use scenarios, as well as reducing spectral efficiency by minimizing overhead procedures and minimizing interference between terminals in the network. Dynamic Spectrum Sharing (DSS) is a key enabler of 5G NR, enabling cellular networks to adapt to the varying needs across spectrum bands and maximize use of available resource as well as increase spectrum utilization by sharing underutilized frequency bands. Dynamic Spectrum Sharing enables dynamic virtualization of aggregated spectrum, thus allowing edge-to-core and core-to-edge communications with ultra-low latency. Dynamic Spectrum Sharing is a cornerstone for 5G, since it is widely expected that NR will operate in licensed spectrum bands with good coverage and throughput as well as in unlicensed spectrum bands with high propagation losses, low coverage and throughput (e.g., mmWave)” Dynamic Spectrum Sharing (DSS) is a spectrum management scheme for 5G networks. DSS enables the sharing of bandwidth between different systems and users, e.g. between licensed radio access technologies (RATs), unlicensed RATs, and legacy or legacy-plus devices. These multiplexing/splitting/combining operations can be applied at both data and control plane levels. Dynamic spectrum sharing (DSS) enables 5G NR to share available spectrum resources with other devices and networks, when the use of that spectrum is not required. This improves spectral efficiency by increasing the overall bandwidth available to relay devices. Dynamic Spectrum Sharing (DSS) was defined in 3GPP Release 12 as a feature to enable sharing of spectrum resources. This paper describes how DSS will be implemented over Dynamic Spectrum Access (DSA), which is one of the key technologies that enables 5G Radio Access network (RAN) deployment. Dynamic Spectrum Sharing (DSS) is an emerging 5G mobile communications technology that provides high performance and low latency for multi-core, multi-user and multi-hop communication. DSS enables sharing of part of the spectrum in advance of scheduled time in order to reduce interference or other constraints. This feature can be beneficial for mitigating deployment challenges and increases capacity, enhances user experience and reduces cost by utilizing different spectrum bands at different times in response to traffic demand. Dynamic Spectrum Sharing (DSS) is a key technique that allows mobile operators to exploit available spectrum resources more efficiently by automatically controlling the selection and use of available licensed and unlicensed bands. DSS interworks with DSA and DFT to enable efficient sharing of licensed spectrum channels.

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