Abstract
In this chapter, the newly introduced procedures (IAM/beam management/power control/HARQ) in 5G NR are first described by taking into account the characteristics of the NR design. The concept “beam” is used in NR and the beam-based operation is applied in the procedures such as initial access and beam management for both downlink and uplink. HARQ is enabled to be much more flexible to achieve the low latency requirement. Then RAN architecture is introduced considering different 5G deployment options including NR stand-alone and LTE-NR dual connectivity and RAN functionality split. Finally, the protocols related to higher layer procedures including UE state transition, paging, mobility, etc. for stand-alone NR are described.
Coauthored with Mazin Al-Shalash.
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Notes
- 1.
Common RB 0, whose lowest subcarrier is also known as “Point A” corresponding to the DL ARFCN on the downlink channel raster.
- 2.
The uplink information is contained in RACH-ConfigCommon in BWP-UplinkCommon in UplinkConfigCommon in ServingCellConfigCommonSIB.
- 3.
The network may need to provide the on-demand SI less frequently if the UE can utilize system information provided on one cell in multiple cells.
- 4.
Q.v. Sect. 11.1.
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Lei, W. et al. (2021). 5G Procedure, RAN Architecture, and Protocol. In: 5G System Design. Wireless Networks. Springer, Cham. https://doi.org/10.1007/978-3-030-73703-0_4
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