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Spec changeRAN #113TS 36.508

TS 36.508 V19.3.0 adds NTN TDD scheduling combination 8

Published 2026-11-06Updated 2026-11-063GPP TSG RAN #113

At a glance

TS 36.508 V19.3.0 adds combination 8 scheduling for narrowband internet of things (NB-IoT) over non-terrestrial networks (NTN) using time division duplex (TDD).

What changed

Clause 8.1.4.3.1.2 now contains the heading "Scheduling for combination 8 for NTN TDD". Within NB-IoT system information block (SIB) scheduling, one new row identifies SIB2-NB. A second new row identifies SIB31-NB as a separate scheduled block.

Source: 3GPP TS 36.508 V19.3.0, clause 8.1.4.3.1.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/36_series/36.508/36508-j30.zip

Change request 1580, revision 3 and category F, is titled System Information Combination Updates. Iridium Satellite LLC and Cambridge Consultants Ltd are both listed as its sources. The request's work item concerns user equipment conformance testing for internet of things over NTN using TDD.

Separately, clause 6.6.2 changes packet-filter choices for reference dedicated bearer contexts. The row offers filter 11 or the pair of filters 14 and 15. The note associates filter 11 with Transmission Control Protocol (TCP) and Message Session Relay Protocol (MSRP). Filters 14 and 15 serve Generic Routing Encapsulation (GRE) carried in User Datagram Protocol (UDP). The note names that second option "GRE-in-UDP (IP Connectivity)", with IP meaning internet protocol.

Source: 3GPP TS 36.508 V19.3.0, clause 6.6.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/36_series/36.508/36508-j30.zip

Sources

  1. 3GPP TS 36.508 V19.3.0, clause 8.1.4.3.1.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/36_series/36.508/36508-j30.zip
  2. CR 1580 (R5-264748, Iridium Satellite LLC, Cambridge Consultants Ltd): System Information Combination Updates, approved in RP-262064 at RAN #113. Source: 3GPP CR database.
  3. 3GPP TS 36.508 V19.3.0, clause 6.6.2. © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/36_series/36.508/36508-j30.zip
  4. 3GPP TS 36.508 V19.2.0 (previous version, compared clause by clause). © 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TSDSI, TTA, TTC). Official text: https://www.3gpp.org/ftp/Specs/archive/36_series/36.508/36508-j20.zip

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