SGW Handover Configuration Scenarios

Under Network Devices, more than one MME Control node can be provisioned.

Use the existing S1/X2/Tau Handover command to handoff between ENBs belonging to different MMEs.

More than one ENB can be provisioned for each MME.

For example, if the “Num of eNodeBs Per MME” is 2, you will have 4 ENBs for each MME, 2 in the ENB group (or the source group) and 2 in the target ENB group (or the target group). 

ENBs are indexed as follows:

ENBs in the source group will be indexed from 1 to the total number of source ENBs. ENBs in the target group will be indexed from 1 + the total number of source ENBs to the total number of ENBs in both groups.

ENBs are distributed among MMEs as follows:

For example, if you have 24 ENBs and 3 MMEs (Num of eNodeBs Per MME = 4),

• MME1 will have Source ENB 1 to 4 and Target ENB 13 to 17

• MME2 will have Source ENB 5 to 8 and Target ENB 17 to 20

• MME3 will have Source ENB 9 to 12 and Target ENB 21 to 24

Under SGW Nodal Test Configuration Options, if you select “HSGW Node Emulation”, you may provision 1 or 2 HSGW nodes.

Based on the initial network, mobiles are initially distributed among either the source ENBs or HSGW nodes in a round robin fashion.

The HSGW Nodes are indexed from 1+ the total number of ENBs to the total number of ENBs and HSGW Nodes.

Use the Handover command to execute inter-tech EHRPD handovers.

If more than one HSGW nodes are provisioned and mobile is currently on an HSGW node, use the Handover command to execute inter-HSGW handovers.

Under SGW Nodal Test Configuration Options, if you select ePDG Node Emulation and or SGSN Node Emulation, you may provision 1-1000 ePDG nodes. You may also provision 1-2 SGSN Nodes. *UMTS Version 8 is required to enable both Emulated Nodes at same time.

Command Mode provides the capability to execute the available commands on individual subscribers where the Sequencer executes the available commands on all subscribers.

With ePDG Node Emulation and SGSN Node Emulation both enabled (UMTS Version 8) the following Initial Network options are available:

• LTE                                         4G
• UMTS (IuPS over IP)               3G (SGSN)
• GPRS                                      3G (SGSN)
• ePDG                                      2G (WiFi)

Example:

Example of PDG Node & SGSN Node emulation enabled:

• MME Control Node                             # of Nodes set to 2
• eNodeB                                             # of Nodes set to 5
• Target eNodeB                                  10 as a result of the above
• Target SGSN Control Node                # of Nodes set to 2                                             
• Target ePDG Control Node                # of Nodes set to 2                                             

In this example user configured 2 MME Nodes with 5 eNodeBs per MME. This creates 10 eNodeBs and 10 Target eNodeBs. With Initial Network set for LTE all subscribers are created on the LTE side.

S1/X2/TAURAU Handover:

Available Target Node(s) 1-24 (only 1-20 are applicable)

Inter-Tech Handover:

Available Target Nodes 1-24 (only 21-24 are applicable)

         21&22 designated 2G (ePDG)

         23&24 designated 3G (SGSN)

4G Nodes are 1-20

3G Nodes are 23-24

2G Nodes are 21-22