TS 29.421 – IMS Interworking with External IP Networks
3GPP TS 29.421 is the 3GPP Technical Specification for IMS Interworking with External IP Networks. It is part of 3GPP Rel-8 (version 8.1.0).
Defines interworking between TISPAN IMS and external IP networks via IBCF/I-BGF, including SIP mapping, NAT, and IP version translation.
Releases and versions of TS 29.421
| Release | Latest version | Links |
|---|---|---|
| Rel-8 | 8.1.0 | Read · Download (3GPP) |
Scope of TS 29.421
Category: Core Network (IMS). Technology generation: Multi-Gen. Network layer: CoreNetwork.
Who should read this specification?
- Network operators
- Device manufacturers
- Researchers and academics
Implementation notes
Complexity level: Intermediate. Implementation difficulty: Medium.
Key technologies
Other specifications in the 29 series
- TS 29.412 Control Procedures for Trunk Gateways in NGN Networks
- TS 29.413 NGAP for Non-3GPP Access
- TS 29.414 Nb Interface Bearer Transport & Control Protocols
- TS 29.415 Nb User Plane Protocol Specification
- TS 29.424 H.248 Profile for Trunking Media Gateways
- TS 29.433 TISPAN endorsement of 3GPP Cx and Dx interfaces
- TS 29.435 NSCE Server Services API Specification
- TS 29.437 SEAL Spatial Anchor and Map APIs
Frequently asked questions
What is 3GPP TS 29.421?
3GPP TS 29.421 is the 3GPP Technical Specification for IMS Interworking with External IP Networks. Defines interworking between TISPAN IMS and external IP networks via IBCF/I-BGF, including SIP mapping, NAT, and IP version translation.
Which 3GPP releases include TS 29.421?
TS 29.421 is part of 3GPP Rel-8. The latest version on 3GPP Explorer is 8.1.0 (Rel-8).
What category does TS 29.421 belong to?
TS 29.421 belongs to the Core Network (IMS) category of 3GPP specifications. It applies to Multi-Gen networks.
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