Backhaul

The network connection between a remote cell site and the core network. Backhaul can be provided via fiber optic cables, microwave links, or satellite. Secure backhaul is critical to prevent interception of user data.

Categories: Radio Access NetworkCore NetworkThreats and Attacks

Backhaul in context

The radio access network is where mobile devices attach to the operator's infrastructure. Attacks in this layer include IMSI catching, rogue base stations and downgrade attacks; defenses rest on mutual authentication, integrity-protected signaling and Open RAN supply-chain hygiene.

The mobile core carries subscriber sessions, mobility and policy. In 4G it is the EPC (MME, HSS, S/PGW); in 5G it is the Service-Based Architecture with AMF, SMF, UPF, AUSF, UDM and the NRF.

To place Backhaul in the wider telecom-security picture, review AMPS, BTS, Jamming, Open RAN, RAN and Slice Hopping — each entry cross-references back to this page so you can walk the topic in either direction.

Related terms

More from the TelcoSec Glossary

Browse the full TelcoSec Glossary, the Ultimate Guide to Mobile Network Security, or the P1 Arsenal of telecom-security tools.