lteInterface
The lteInterface table models the different types of interfaces between LTE devices.
LTE interfaces modelled in NCIM
The following table lists the LTE interface types that are modelled in NCIM, and shows which interface types are used to connect different LTE elements. The interface types are described below the table.| LTE element | EIR | eNodeB | HSS | MME | PCRF | PGW | SGW | SGSN |
|---|---|---|---|---|---|---|---|---|
| Equipment Identity Register (EIR) | S13 | |||||||
| Evolved NodeB | X2 | S1-MME | S1-U | |||||
| Home Subscriber Server (HSS) | S6a | |||||||
| Mobility Management Entity (MME) | S13 | S1-MME | S6a | S10 | S11 | S3 | ||
| Policy and Charging Rules Function (PCRF) | Gx | |||||||
| Packet Data Network Gateway (PGW) | Gx | S5 S8 |
||||||
| Serving Gateway (SGW) | S1-U | S11 | S5 S8 |
S4 | ||||
| Serving GPRS Support Node (SGSN) | S4 |
- Gx
- Interface between the PGW and the Policy and Charging Rules Function (PCRF). In particular, this is the interface between the Policy Control Enforcement Function (PCEF) or the PGW and the PCRF.
- OAM
- Operational and maintenance interface, used to manage the device.
- SGi
- Interface between the PGW and any packet data network.
- S1
- Interface between the eNodeB and the core network.
- S1-MME
- Control plane interface between an eNodeB and an MME.
- S1-U
- User plane interface between an eNodeB and one or more SGWs.
- S3
- Control plane interface between an MME and a Serving GPRS Support Node (SGSN). The interface is used to manage mobility inter-3GPP Radio Access Technology (RAT) mobility between, for example, LTE and UMTS or GPRS.
- S4
- Control and user plane interface between an SGW and a Serving GPRS Support Node (SGSN).
- S5
- Modelled in NCIM as a user plane interface between an SGW and
a PGW within the same Public Land Mobile Network (PLMN).Note: The S5 interface can carry control and user plane data but in NCIM it is modelled as user plane only.
- S6a
- Control plane interface between MME and Home Subscriber Server (HSS).
- S8
- Equivalent to the S5 interface except that it connects an SGW
in the Visited PLMN (VPLMN) to a PGW in the roaming subscriber's Home
PLMN (HPLMN).Note: The S5 interface can carry control and user plane data but in NCIM it is modelled as user plane only.
- S10
- Inter-MME control plane interface.
- S11
- Control plane interface between an MME and an SGW.
- S13
- Control plane interface between MME and the Equipment Identity Register (EIR).
- X2
- Modelled in NCIM as a control plane interface between neighbouring
eNodeBs. Used for signalling between neighbouring eNodeBs.Note: The X2 interface can carry control and user plane data but in NCIM it is modelled as control plane only.
The following table describes the lteInterface table.
| Column name | Type | Constraints | Description |
|---|---|---|---|
| entityId | Integer | FOREIGN KEY NOT NULL |
|
| interfaceType | Enumeration | Type of LTE interface. Takes one of the following
values:
|