What is T304 timer in LTE?
T304. Reception of RRCConnectionReconfiguration message including the MobilityControl Info or reception of MobilityFromEUTRACommand message including CellChangeOrder. Criterion for successful completion of handover to EUTRA or cell change order is met (the criterion is specified in the target RAT in case of inter-RAT)
What is timer in LTE?
Function at Start/Stop/Expiry. T300. >>Starts at the RRC connection REQ transmit. >>Stops at the Receipt of RRC connection setup or reject message OR at the cell reselection time OR upon abortion of connection establishment by Higher layers (L2/L3).
What is T301 timer?
The T301 is a supervision timer for the RRCConnectionReestablishment procedure. If T311 expires before the UE finds a suitable cell, or the T301 expires before the RRCConnectionReestablishment, the UE goes to RRC_IDLE. If success is achieved in the Reestablishment procedure, UE happily goes back to RRC_CONNECTED.
What is T312 timer?
The timer T312 starts upon triggering a measurement report for measurement identity for which T312 has been configured while T310 timer is running. • It stops upon receiving N311 consecutive in-sync indications from lower layers. • upon triggering the handover procedure.
What is LTE RLF?
“RLF report” is used in LTE systems allowing UE to report information to the network about a connection failure event, radio link failure (RLF) or handover failure (HOF). The information includes available geographical location information and available mobility measurement results.
What is N310 in LTE?
When the UE detects a few consecutive “out-of-sync” indications, known as N310, it initiates a network-configured RLF timer T310. By default, the number of N310, 200 ms interval, out-of-sync pulses is 1.
What is RRC connection reestablishment?
The purpose of RRC CONNECTION RE-ESTABLISHMENT procedure is to re-establish the RRC connection, which involves the resumption of SRB1 operation and the re-activation of security (without changing algorithms). The UE shall only initiate this procedure when AS security has been activated.
What is RLF handover?
RLF handover is UE-based mobility and provides a recovery mechanism when the backward handover signaling with the source cell partially fails due to poor radio conditions.
What are the types of LTE timers?
This page covers LTE timers, which include T300, T301, T303, T304, T305, T310, T311, T320 and T321. Please see the below table for more details on the topic. >>Stops at the Receipt of RRC connection setup or reject message OR at the cell reselection time OR upon abortion of connection establishment by Higher layers (L2/L3).
What is the t3157 timer?
In a network supporting validation of Priority Uplink Requests, the timer T3157 supervises an additional validity period for an unused (old) token. When T3151 (supervising the periodic UPLINK BUSY) expires a new token is sent in the UPLINK BUSY message on the FACCH of the voice group call channels and timer T3157 is started.
When does the timer start and stop in a mobile network?
The timer starts at the allocation of channel using immediate assignment message. At the seizure of channels by mobile subscriber the timer is stopped. The timer value is set by network taking into consideration so that it will be higher than max. time for L2 establishment attempt. The timer starts when handover message is sent by mobile.
What are the timers used in GSM on network side (BTS)?
This page covers timers used in GSM on network side (BTS) which include T3101, T3103, T3105, T3107, T3109, T3111, T3113, T3115, T3121, T3123, T3141, T3151, T3153, T3155 and T3157. The timer starts at the allocation of channel using immediate assignment message.
