38.3313GPPNRProtocol specificationRadio Resource Control (RRC)Release 15TS
The UE performance requirements for RRC procedures are specified in the following tables. The performance requirement is expressed as the time in [ms] from the end of reception of the network -> UE message on the UE physical layer up to when the UE shall be ready for the reception of uplink grant for the UE -> network response message with no access delay other than the TTI-alignment (e.g. excluding delays caused by scheduling, the random access procedure or physical layer synchronisation). In case the RRC procedure triggers BWP switching, the RRC procedure delay is the value defined in the following table plus the BWP switching delay defined in TS 38.133 , clause 8.6.3.
Figure 12.1-1: Illustration of RRC procedure delay
Table 12.1-1: UE performance requirements for RRC procedures for UEs
Network -> UE
UE -> Network
RRC Connection Control Procedures
RRC reconfiguration (scell addition/release)
RRC reconfiguration (LTE/NR SCG establishment/ modification/ release)
RRC reconfiguration (Intra-NR mobility with LTE/NR SCG establishment/ modification/ release)
6 or 10
Value=6 applies for a UE supporting reduced CP latency for the case of RRCResume message only including MAC and PHY configuration, reestablishPDCP and reestablishRLC for SRB2 and DRB(s), and no DRX, SPS, configured grant, CA or MIMO re-configuration will be triggered by this message. Further, the UL grant for transmission of RRCResumeComplete and the data is transmitted over common search space with DCI format 0_0.
In this scenario, the RRC procedure delay [ms] can extend beyond the reception of the UL grant, up to 7 ms.
For other cases, Value = 10 applies.
RRC resume (scell addition)
Initial AS security activation
Inter RAT mobility
Handover to NR
RRCReconfiguration (sent by other RAT)
The performance of this procedure is specified in TS 36.133  clauses 22.214.171.124 and 126.96.36.199 in case of handover from E-UTRA to NR.
Handover from NR
The performance of this procedure is specified in TS 38.133 , clauses 188.8.131.52.2 and 184.108.40.206.2.
UE assistance information
UE capability transfer
Annex A (informative): Guidelines, mainly on use of ASN.1