F.3 Off-network timers
24.2823GPPMission Critical Data (MCData) signalling controlProtocol specificationRelease 18TS
F.3.1 Timers in off-network SDS
The table F.3.1-1 lists the timers used in off-network SDS, their start values, their limits, describes the cause of the start, and the action to take on normal stop and on expiry.
Table F.3.1-1: Timers in off-network SDS
|
Timer |
Timer value |
Cause of start |
Normal stop |
On expiry |
|---|---|---|---|---|
|
TFS1 (SDS message retransmission) |
Default value: 40 millisecond Configurable. |
When the client sends a SDS OFF-NETWORK MESSAGE message. |
Associated counter CFS1 (SDS message retransmission) reaches upper limit |
Send a SDS OFF-NETWORK MESSAGE message. |
|
TFS2 (SDS notification retransmission) |
Default value: 40 millisecond Configurable. |
When the client sends a SDS OFF-NETWORK NOTIFICATION message. |
Associated counter CFS2 (SDS notification retransmission) reaches upper limit |
Send a SDS OFF-NETWORK NOTIFICATION message. |
|
TFS3 (delivery and read) |
Default value: 120 millisecond Configurable. |
When the client receives a SDS OFF-NETWORK MESSAGE with Disposition request type IE set to "DELIVERY AND READ". |
When a SDS message display indication is received. |
Send a SDS OFF-NETWORK NOTIFICATION message with Disposition type IE set to "DELIVERED" and when the MCData client has displayed the message to the MCData user, send a SDS OFF-NETWORK NOTIFICATION message with Disposition type IE set to "READ" |
|
NOTE: Value of timer TFS3 (delivery and read) should be configured such that, when a consolidated "DELIVERED AND READ" notification is not feasible, the MCData client is able to send the "DELIVERED" disposition notification without delay. |
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F.3.2 Timers in off-network emergency alert
The table F.3.2-1 lists the timers used in off-network emergency alert, their start values, their limits, describes the cause of start, and the action to take on normal stop and on expiry.
Table F.3.2-1: Timers in off-network emergency alert
|
Timer |
Timer value |
Cause of start |
Normal stop |
On expiry |
|---|---|---|---|---|
|
TFE1 (Emergency Alert) |
Default value: 30 seconds Maximum value: 60 seconds Configurable. Set to the value of "/<x>/OffNetwork/Timers/TFE1" leaf node present in the UE initial configuration as specified in 3GPP TS 24.483 [2]. |
Receipt of GROUP EMERGENCY ALERT. |
Receipt of GROUP EMERGENCY ALERT CANCEL. |
Assume end of emergency state, remove associated user from the list. |
|
TFE2 (emergency alert retransmission) |
Default value: 5 seconds Maximum value: 10 seconds Configurable. Set to the value of "/<x>/OffNetwork/Timers/TFE2" leaf node present in the UE initial configuration as specified in 3GPP TS 24.483 [2]. |
Transmission of GROUP EMERGENCY ALERT. |
Transmission of GROUP EMERGENCY ALERT CANCEL. |
Transmit GROUP EMERGENCY ALERT. |
Annex G (normative):
Counters and states