SBN

Source Block Number

Other →
Introduced in Rel-8

SBN is the Source Block Number, an identifier used in multimedia broadcast and multicast services to number source blocks for forward error correction, aiding in packet reassembly for reliable delivery.

Category
Other
Introduced
Rel-8
Where
Services › Codecs
Specifications
3 specs
SBN Description Purpose Specifications

Description

Source Block Number

Purpose & Motivation

Explore further

Broader topics and technologies where SBN plays a role.

Topics
Lawful InterceptServices & ApplicationsRadio Access Network

Defining Specifications

3GPP specifications that define or reference SBN, with the latest known release. Sourced from the 3GPP document catalog — see methodology.

SpecificationTitleRelease
TS 26.346 vj20 MBMS User Services Media Codecs & Protocols Rel-19
TR 26.946 vj00 MBMS User Services Overview Rel-19
TR 26.947 vj00 FEC Evaluation for MBMS Enhancement Rel-19
Patrick Zandl

About the author: Patrick Zandl (b. 1974)

Telecommunications specialist, technology journalist (founder of the Mobil server), and developer who has been running since 2025 — the largest Czech-language resource on AI-assisted programming. Formerly Chief Wizard Architect at Prusa3D and head of development for Turris at CZ.NIC; currently a consultant and instructor on AI implementation in companies.

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