Address Context - Realm

Voice over LTE (VoLTE) is a technology for providing existing voice and SMS services over LTE which does not have a circuit-switched domain. It is implemented using IP Multimedia Subsystem (IMS), which is a standard 3GPP technology for IP-based multimedia services. One of the key requirements of the Roaming Architecture for Voice over LTE with Local Breakout (RAVEL) as described in 3GPP TS 23.228, 3GPP TS 24.229, and as proposed in 3GPP TR 23.850, is that the  Interconnection Border Control Function (IBCF) supports Optimal Media Routing (OMR) procedures and allows bypassing the Transition Gateways (TrGWs).

The 3GPP TS 29.079 describes the procedures for optimizing the media path for call within IP Multimedia Subsystem. The purpose of OMR is to identify and remove unnecessary media functions from the media path for each media stream associated with a session. The OMR procedures identify and name the IP address realm used for each media path segment among UAs and TrGWs. An IP realm name is associated with each set of IP endpoints that are mutually reachable through IP routing and without address translation. Endpoints in different IP realms usually require allocation of a TrGW between those IP realms for connectivity and possibly for NAT.

Prior to OMR procedures, the SBC supported direct media between endpoints residing in the same media zone. With the implementation of OMR procedures, the SBC is enhanced to perform media path optimization even when direct media is not possible between end points by allowing intermediate nodes to be bypassed for media anchoring. SBC supports OMR procedures in IBCF and P-CSCF roles.

To View Realm

On SBC main screen, navigate to All > Address Context > Realm.

The Realm can be checked for each Address Context or for all the Address Contexts created. Use the drop-down box to select the desired Address Context.

Realm Main Field

The Realm window is displayed.

Realm

To Edit Realm

Realm cannot be edited.

Realm Highlighted

The Realm window is displayed below. It is read only window.

Realm Window

 

To Create Realm

To create a new Realm, click New Realm tab on the Realm List panel.

Realm Fields

 

The Create New Realm window is displayed.

Realm Create Window

The following fields are displayed:

Name

To Copy Realm

To copy any of the created Realm, click the radio button next to the specific Realm which you want to delete.

Realm Highlighted

To copy a Realm, click Copy Realm tab on the Realm List panel.

Realm Fields

 

The Copy Selected Realm window is displayed.

Realm Copy Window

Make the required changes to the required fields and click Save to save the changes. The copied Realm is displayed at the bottom of the original Realm in the Realm panel.

To Delete Realm

To delete any of the created Realm, click the radio button next to the specific Realm which you want to delete.

Realm Highlighted

Click Delete at the end of the highlighted row. A delete confirmation message appears seeking your decision.

Realm Delete Confirmation

 

Click OK to remove the specific Realm from the list.