Timer value
Default 1 min. NOTE 2
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
3GPP Scout / Reference / 5GS NAS timers / T3583
TS 24.501NAS timer
Timer T3583: 5GS session management, UE side
In plain words
The UE starts T3583 when it creates or updates a derived QoS rule and deletes that rule on the first expiry.
Our summary of the spec text quoted below.
What the spec says
Started when
UE creates or updates a derived QoS rule
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
Stopped when
UE deletes the derived QoS rule (see clause 6.2.5.1.4.5)
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
On expiry
On 1st expiry: Deletion of the derived QoS rule
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
State
PDU SESSION ACTIVE
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
Note 2 of the table
NOTE 2: The network may provide the value of this timer applicable to the derived QoS rules of a specific PDU session as RQ timer value in the PDU SESSION ESTABLISHMENT ACCEPT message and PDU SESSION MODIFICATION COMMAND message. The maximum value of the timer is 30 min. [...]
Source: 3GPP TS 24.501 V20.1.0, clause 10.3, table 10.3.1. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24501-k10.zip in the 3GPP archive.
How this page was made
3GPP Scout built this page from TS 24.501 V20.1.0 as indexed on 2026-10-15. The quotes are copied from the spec, and code checks each one against the stored text and the 3GPP archive file before publishing. The plain-words line was written by an AI model (GPT-6 Sol) and checked against the quotes by a second AI model from another company (Claude Opus 5.5). The official 3GPP text governs.