Timer value
6s In WB-S1/CE mode, 24s NOTE 11
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
3GPP Scout / Reference / EPS NAS timers / T3470
TS 24.301NAS timer
Timer T3470: EPS mobility management, network side
In plain words
The network starts T3470 when it sends an IDENTITY REQUEST and retransmits the request when the timer expires.
Our summary of the spec text quoted below.
What the spec says
Started when
IDENTITY REQUEST sent
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Stopped when
IDENTITY RESPONSE received
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
On expiry
Retransmission of IDENTITY REQUEST
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
State
EMM-COMMON-PROC-INIT
Source: 3GPP TS 24.301 V20.1.0, clause 10.2, table 10.2.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: 24301-k10.zip in the 3GPP archive.
Same timer in 5GS (TS 24.501)
TS 24.501 defines the corresponding timer for 5GS. Its page quotes the 5GS wording.
- T3570 (TS 24.501)
How this page was made
3GPP Scout built this page from TS 24.301 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.