What is the size of RRC connection request?
The RRC Connection message is usually around 7 bytes in length while the RRC Connection Setup Complete message may contain the whole NAS information (like TAU or Attach Request) and its size can vary from as small as 8 bytes to as big as over 100 bytes.
What is the function of RRC layer?
The RRC layer performs the following functions such as broadcast of system information, paging, establishment/release of an RRC connection, transfer of NAS information, AS security configuration, transfer of UE radio access capability, measurement configuration and reporting and mobility control.
What is RRC re-establishment?
The RRC Connection Re-establishment is one of the RRC main functions and re-establishes which involves the resumption of SRB1(Signalling Radio Bearer) operation, the re-activation of security and the configuration.
Why is RRC inactive state?
Overview of RRC Inactive state: In 5G, they have introduced new RRC Stats called “RRC Inactive” to minimize latency as well as to reduce signalling load. Transitions from RRC Inactive to Connected is very quick as UE Context is stored at gNB and UE.
What are the functions of RRC?
What are RRC states?
Radio Resource Control ( RRC ) is a layer within the 5G NR protocol stack. It exists only in the control plane, in the UE and in the gNB . The behaviour and functions of RRC are governed by the current state of RRC . In 5G NR , RRC has three distinct states: RRC_IDLE, RRC_CONNECTED and RRC_INACTIVE.
What is RRC Connection establishment for LTE?
The network triggers the RRC connection establishment procedure by sending a Paging message. This could be used to allow the delivery of an incoming SMS or notification of an incoming voice call RRC connection establishment for LTE is relatively simple compared to RRC connection establishment for UMTS.
How to keep the RRC Connection while security is activated?
UE in RRC Connected state can initiate RRC Connection Re-Establishment procedure in order to keep the RRC connection while security is activated. Once this procedure is initiated, the UE will perform below steps: 2. Start T311 This message is used to request the reestablishment of an RRC connection.
What to do when an RRC connection reconfiguration fails?
RRC connection reconfiguration failure UE in RRC Connected state can initiate RRC Connection Re-Establishment procedure in order to keep the RRC connection while security is activated. Once this procedure is initiated, the UE will perform below steps: 2. Start T311 This message is used to request the reestablishment of an RRC connection.
How is the establishment cause determined in an RRC Connection Request?
The establishment cause within the RRC Connection Request message is determined by the Non-Access Stratum (NAS) procedure for which the connection is being established. The relationship between establishment cause and NAS procedure is specified by 3GPP TS 24.301.