Difference between revisions of "My Radio Technology beyond LTE - 38 series notes"

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== 38.300 ==
== 38.300 ==


=== Section 7 Radio Resource Controller (RRC) ===
[[My 3GPP 38.300 Notes]]
 
'''7.1 Services and Functions'''
 
The main services and functions of the RRC sublayer over the Uu interface include:
* Broadcast of System Information related to AS and NAS;
* Paging initiated by 5GC or NG-RAN;
* Establishment, maintenance and release of an RRC connection between the UE and NG-RAN including:
** Addition, modification and release of carrier aggregation;
** Addition, modification and release of Dual Connectivity in NR or between E-UTRA and NR.
* Security functions including key management;
* Establishment, configuration, maintenance and release of Signalling Radio Bearers (SRBs) and Data Radio Bearers (DRBs);
* Mobility functions including:
** Handover and context transfer;
** UE cell selection and reselection and control of cell selection and reselection;
** Inter-RAT mobility.
* QoS management functions;
* UE measurement reporting and control of the reporting;
* Detection of and recovery from radio link failure;
* NAS message transfer to/from NAS from/to UE.
 
The sidelink specific services and functions of the RRC sublayer over the Uu interface include:
* Configuration of sidelink resource allocation via system information or dedicated signalling;
* Reporting of UE sidelink information;
* Measurement configuration and reporting related to sidelink;
* Reporting of UE assistance information for SL traffic pattern(s).
 
'''7.2 Protocol States'''
 
RRC supports the following states which can be characterised as follows:
* '''RRC_IDLE:'''
** PLMN selection;
** Broadcast of system information;
** Cell re-selection mobility;
** Paging for mobile terminated data is initiated by 5GC;
** DRX for CN paging configured by NAS.
* '''RRC_INACTIVE:'''
** PLMN selection;
** Broadcast of system information;
** Cell re-selection mobility;
** Paging is initiated by NG-RAN (RAN paging);
** RAN-based notification area (RNA) is managed by NG- RAN;
** DRX for RAN paging configured by NG-RAN;
** 5GC - NG-RAN connection (both C/U-planes) is established for UE;
** The UE Inactive AS context is stored in NG-RAN and the UE;
** NG-RAN knows the RNA which the UE belongs to;
** Transfer of unicast data and/or signalling to/from the UE over radio bearers configured for SDT.
* '''RRC_CONNECTED:'''
** 5GC - NG-RAN connection (both C/U-planes) is established for UE;
** The UE AS context is stored in NG-RAN and the UE;
** NG-RAN knows the cell which the UE belongs to;
** Transfer of unicast data to/from the UE;
** Network controlled mobility including measurements.
 
'''7.3 System Information Handling'''
 
'''7.3.1 Overview'''
 
System Information (SI) consists of a MIB and a number of SIBs, which are divided into Minimum SI and Other SI:
* '''Minimum SI''' comprises basic information required for initial access and information for acquiring any other SI. Minimum SI consists of:
** ''MIB'' contains cell barred status information and essential physical layer information of the cell required to receive further system information, e.g. CORESET#0 configuration. MIB is periodically broadcast on BCH.
** ''SIB1'' defines the scheduling of other system information blocks and contains information required for initial access. SIB1 is also referred to as Remaining Minimum SI (RMSI) and is periodically broadcast on DL-SCH or sent in a dedicated manner on DL-SCH to UEs in RRC_CONNECTED.
* '''Other SI''' encompasses all SIBs not broadcast in the Minimum SI. Those SIBs can either be periodically broadcast on DL-SCH, broadcast on-demand on DL-SCH (i.e. upon request from UEs in RRC_IDLE, RRC_INACTIVE, or RRC_CONNECTED), or sent in a dedicated manner on DL-SCH to UEs in RRC_CONNECTED (i.e., upon request, if configured by the network, from UEs in RRC_CONNECTED or when the UE has an active BWP with no common search space configured or when the UE configured with inter cell beam management is receiving DL-SCH from a TRP with PCI different from serving cell's PCI). See spec for details what SIBx are within ''Other SI''.
 
 
 


<center>[[My New Radio (NR) notes|To My New Radio (NR) notes]]</center>
<center>[[My New Radio (NR) notes|To My New Radio (NR) notes]]</center>

Latest revision as of 10:37, 27 September 2022

38.300

My 3GPP 38.300 Notes

To My New Radio (NR) notes
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