SMF and PGWc GTPC Optimization with Inter-rack IPC Call Flow

This section describes the SMF and PGWc GTPC Optimization with Inter-rack IPC call flow.

SMF and PGWc GTPC Optimization with Inter-rack IPC Call Flow
SMF and PGWc GTPC Optimization with Inter-rack IPC Call Flow Description

Step

Description

1

The following are sub-steps in the Alt SMF to SGW flow non-optimized scenario.

Note

The SMF-service section performs the following:

  • Triggers the networking event.

  • Creates the resolute bearer.

1a

SMF-service sends the S5 or the S8 Create Bearer Request to R1-GTPC-EP.

1b

R1-GTPC-EP sends the S5 or the S8 Create Bearer Request to R2-GTPC-EP.

1c

R2-GTPC-EP sends the S5 or the S8 Create Bearer Request to SGW-service.

1d

SGW-service processes and sends the S11 Create Bearer Request to R2-GTPC-EP.

1e

R2-GTPC-EP sends the S11 Create Bearer Request to MME.

1f

MME processes and sends the S11 Create Bearer Response to R2-GTPC-EP.

1g

R2-GTPC-EP sends the S11 Create Bearer Response to SGW-service.

1h

SGW-service processes and sends the S5 or the S8 Create Bearer Response to R2-GTPC-EP.

1i

R2-GTPC-EP sends the S5 or the S8 Create Bearer Response to R1-GTPC-EP.

1j

R1-GTPC-EP sends the S5 or the S8 Create Bearer Response to SMF-service.

2

The following are sub-steps in the SMF to SGW flow-optimized scenario.

2a

SMF-service sends the IPC request to R2-GTPC-EP.

Note

The R2-GTPC-EP section performs the following:

  • Encapsulates the S5 or the S8 Create Bearer Request.

  • Sends it over the inter-rack UDP connection.

2b

R2-GTPC-EP sends the S5 or the S8 Create Bearer Request to SGW-service.

2c

SGW-service processes and sends the S11 Create Bearer Request to R2-GTPC-EP.

2d

R2-GTPC-EP sends the S11 Create Bearer Request to MME.

2e

MME processes and sends the S11 Create Bearer Response to R2-GTPC-EP.

2f

R2-GTPC-EP sends the S11 Create Bearer Response to SGW-service.

2g

SGW-service processes and sends the S5 or the S8 Create Bearer Response to R2-GTPC-EP.

Note

The R2-GTPC-EP section performs the following:

  • Encapsulates the S5 or the S8 Create Bearer Request.

  • Sends it over the inter-rack UDP connection.

2h

R2-GTPC-EP processes and sends the IPC Response to SMF-service.