Rel-8 Radio Access 2G Intermediate

TS 44.004 – Physical Layer Service Definition for GSM/UMTS

Defines physical layer service between MS and BS, specifying channel structures, bit transmission, and interfaces with data link and RLC/MAC layers for GSM and UMTS systems.

Release

Rel-8

What is TS 44.004?

TS 44.004 (Rel-8) — Physical Layer Service Definition for GSM/UMTS. Defines physical layer service between MS and BS, specifying channel structures, bit transmission, and interfaces with data link and RLC/MAC layers for GSM and UMTS systems. Primary function: Protocol Definition. Category: Radio Access (Physical Layer). Technology generation: 2G. Network layer: RAN.

Who should read this specification?

Network operators
Device manufacturers
Regulators and standards bodies

Implementation notes

Complexity level: Intermediate. Implementation difficulty: Medium.

Key Technologies

GSMUMTS

Frequently Asked Questions

What is 3GPP TS 44.004?

3GPP TS 44.004 (Rel-8) is the 3GPP specification for Physical Layer Service Definition for GSM/UMTS. Defines physical layer service between MS and BS, specifying channel structures, bit transmission, and interfaces with data link and RLC/MAC layers for GSM and UMTS systems.

Which 3GPP release is TS 44.004 part of?

TS 44.004 is part of 3GPP Rel-8. The latest known version on 3GPP Explorer is 800.

What does TS 44.004 specify?

Protocol Definition.

What category does TS 44.004 belong to?

TS 44.004 belongs to the Radio Access (Physical Layer) category of 3GPP specifications. It applies to 2G networks.

View the full specification with interactive table of contents, version history, and AI analysis.

Read Full Specification →