3GPP Compliance¶

Ella Core implements 3GPP-standard interfaces for 4G and 5G SA.

Note

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Supported¶

Ella Core is a single binary and does not expose internal 3GPP interfaces. See Architecture.

Registration. 4G: attach, detach, and normal and periodic tracking area update. 5G: initial, mobility, and periodic registration, and UE- and network-initiated deregistration.
Service request. An idle UE returns to connected mode to resume its session.
Paging. Ella Core pages an idle UE when downlink data arrives for it.
Handover. 4G: S1 handover, and X2 handover via the Path Switch procedure. 5G: Xn handover, and N2 handover between radios served by Ella Core.

Ella Core carries IP data sessions for 4G and 5G subscribers.

Session management. 4G PDN connectivity and 5G PDU sessions: establishment, modification, and release, including network-requested procedures.
Session types. IPv4, IPv6, and IPv4v6.
QoS. One non-GBR QoS flow per session.

Procedures. Identity, authentication, and security mode control.
Authentication. EPS-AKA on 4G, 5G-AKA on 5G.
Subscriber identity concealment. SUCI with the null scheme, Profile A, and Profile B, on 5G.
Ciphering and integrity. The null, SNOW 3G, and AES algorithms: EEA0/1/2 and EIA0/1/2 on 4G, NEA0/1/2 and NIA0/1/2 on 5G.

Cell identity and E-CID positioning: LPPa on 4G, NRPPa on 5G. See the Location API, which is beta.

No voice. Ella Core provides no IMS, VoLTE, or VoNR.
No emergency services. Emergency sessions and emergency service requests are rejected.
No roaming. Ella Core is a self-contained core for a single network; there is no S6a, S8, or inter-operator interface.