User's Manual

Ver.
CHAPTER 4. Message Flow
2600-00FKQFGA2
1.0
Step Description
15) The S-GW transmits the Modify Bearer Response message to the MME. If the target
Indoor Pico Cell changes the path for assisting packet resorting, the S-GW immediately
transmits at least one ‘end marker’ packet to the previous path.
16) If any of the conditions listed in section 5.3.3.0 of TS 23.401(6) are met, the UE starts
the Tracking Area Update procedure.
17)~18) When the timer started at step 13) expires, the MME transmits the UE CONTEXT
RELEASE COMMAND message to the source Indoor Pico Cell. The source Indoor Pico
Cell releases the resources related to the UE and replies with the UE CONTEXT
RELEASE COMPLETE message.
19)~20) If indirect forwarding is used and when the timer started by the MME at step 13)
expires, the MME transmits the Delete Indirect Data Forwarding Tunnel Request
message to the S-GW.
This message makes the S-GW release the temporary resources allocated for indirect
forwarding at step 5).
The S-GW responds to the MME with the Delete Indirect Data Forwarding Tunnel
Response message.
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