After the eNB sent the RRC Connection setup, it waits for a specific time for the UE to send RRC Connection Setup Complete message, what is that timer?
The
T300 timer is started when the UE sends an RRCConnectionRequestmessage.
If the timer expires before the UE has received a response in the form
of an RRCConnectionSetupor Reject, the UE informs the higher layers and
ends the connection procedure.
The T301 timer is started when the UE sends an RRCConnectionReestablishmentRequestfollowing a radio link failure. If the timer expires before the UE has received an RRCConnectionRestablishmentor an RRCConnectionReestablishmentReject, the UE enters Idle mode.
The T310 timer is started when Physical layer problems are detected whereby the UE receives N310 out-of-sync indicators. The timer is stopped if N311 in-sync indicators are received. If T310 expires, the UE either enters Idle mode or initiates the connection reestablishment procedure, depending on whether security is activated.
The T311 timer is started when the RRC reconnection procedure is started. If the timer expires before the selection of a suitable LTE (or other RAT) cell, the UE enters Idle mode.
The T301 timer is started when the UE sends an RRCConnectionReestablishmentRequestfollowing a radio link failure. If the timer expires before the UE has received an RRCConnectionRestablishmentor an RRCConnectionReestablishmentReject, the UE enters Idle mode.
The T310 timer is started when Physical layer problems are detected whereby the UE receives N310 out-of-sync indicators. The timer is stopped if N311 in-sync indicators are received. If T310 expires, the UE either enters Idle mode or initiates the connection reestablishment procedure, depending on whether security is activated.
The T311 timer is started when the RRC reconnection procedure is started. If the timer expires before the selection of a suitable LTE (or other RAT) cell, the UE enters Idle mode.
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