1/10/2018
LTE Timers | T300,T301,T303,T304,T305,T310,T311,T320,T321
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LTE Timers
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This page covers LTE timers which include T300, T301, T303, T304,
Zigbee | z-wave |
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Bluetooth | GSM |
UMTS | LTE | WLAN |
T305, T310, T311, T320 and T321.
802.11ac | IoT |
RADAR | satellite |
LTE
Timers
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).
>>At the expiry performs the actions
T301
>>Starts at the RRC Connection Re-establishment
REQUEST
>>Stops at the Receipt of RRC Connection Reestablishment OR
RRC Connection Re-Establishment REJECT message
OR
When selected cell becomes unsuitable to continue
further
>>At expiry, it Go to RRC_IDLE mode
T303
>>Starts when access is barred while performing RRC
CONNECTION ESTABLISHMENT for MO(Mobile
Originating) calls
>>Stops while entering RRC_CONNECTED and upon
cell re-selection mode
>>At expiry, Informs higher layers about barring
alleviation
T304
>>Starts at the Receipt of RRC CONNECTION
Waveguide |
RECONFIGURATION message
http://www.rfwireless-world.com/Terminology/LTE-timers.html
along with Mobility
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1/10/2018
LTE Timers | T300,T301,T303,T304,T305,T310,T311,T320,T321
RECONFIGURATION message along with Mobility
Control Info OR at the receipt of mobility from EUTRA
command message including CELL CHANGE ORDER
>>Stops at the successful completion of HANDOVER to
EUTRA or CELL CHANGE ORDER is met
>>At expiry, it performs action based on need.
1. In the case of CELL CHANGE ORDER from E-UTRA
OR intra E-UTRA handover, initiate the RRC connection
re-establishment procedure.
2. In case of HANDOVER to E-UTRA, perform the actions
defined as per the specifications applicable for the source
RAT.
T305
T310
T311
T320
T321
>>starts when access is barred while performing RRC
CONNECTION ESTABLISHMENT for MO signaling
>>Stops when entering RRC_CONNECTED and when
UE does cell re-selection
>> At expiry, Informs higher layers about barring
alleviation
>>Starts when UE detects PHY layer related problems
(when it receives N310 consecutive out-of-sync INDs
from lower layers)
>>Stops 1. When UE receives N311 consecutive in-sync
INDs from lower layers/
2. Upon triggering the HANDOVER procedure
3. Upon initiating the CONNECTION REESTABLISHMENT procedure
>> At expiry, if security is not activated it goes to RRC
IDLE else it initiates the CONNECTION REESTABLISHMENT Procedure
>>Starts while initiating RRC CONNECTION REESTABLISHMENT procedure
>>stops upon selection of suitable E-UTRA cell OR a cell
using another RAT
>>At expiry it enters RRC IDLE state
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>> Starts upon receipt of t320 or upon cell re- selection to
E-UTRA from another RAT with validity time configured
for dedicated priorities (in which case the remaining
validity time is applied).
>>Stops upon entering RRC_CONNECTED state, when
PLMN selection is performed on request by NAS OR
upon cell re-selection to another RAT
>> At expiry, it discards the cell re-selection priority info
provided by dedicated signaling
DECT| ISDN| ATM|
>>starts upon receipt of measConfig including a
reportConfig with the purpose set to reportCGI
>> Stops at either of following cases:
1. Upon acquiring the information needed to set all fields
of globalCellId for the requested cell
2. upon receipt of measConfig that includes removal of
the reportConfig with the purpose set to reportCGI
>> At expiry initiates the measurement reporting
procedure, stop performing the related measurements
and remove the corresponding measID
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