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LTE: When SGW triggers "stop paging" message to MME ?

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LTE: When SGW triggers "stop paging" message to MME ?
posted Jul 28, 2018 by Harshita

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As per LTE core network architecture, MME shares S11 interface with SGW and SGW has S5/S8 interface with PGW.
I went through Create Session Response message sent by SGW to MME and found PGW-C and PGW-U tunnel ids.
I want to know what MME does with these PGW-C and PGW-U tunnel Ids ?

+2 votes

Consider UE has connected with multiple PDN connection each contains an different APN information, when we modify APN-AMBR value for both APNs at the same time in HSS and initiated HSS Initiated Subscribed QOS modification procedure, HSS sends Insert Subscriber data to MME with modified APN-AMBR information of both APN to MME, But MME forwards only first modified APN-AMBR information to S-GW in Modify Bearer Command message.
Please can anyone explain why MME does not forward second APN-AMBR information to S-GW ???. Whether the scenario is right either we can modify multiple APN-AMBR informations of single UE at the same time

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