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Understanding the SIPTO Functionality for Traffic Offloading in Mobile Networks

This document outlines the workings of the SIPTO (Selective IP Traffic Offload) function, a crucial feature for mobile operators. SIPTO allows operators to offload specific traffic types at a network node closer to the user's point of attachment in the access network. It operates on a per-user, per-APN basis based on the operator's configuration of HSGW and user subscription data. The HSGW selects the appropriate gateways for SIPTO while ensuring there is no adverse impact on existing eFAP functionalities or the serving P-GW.

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Understanding the SIPTO Functionality for Traffic Offloading in Mobile Networks

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  1. A30-20110523-xxx SIPTO Support Lizhiming lizhiming@huawei.com

  2. Goal • Goal • The SIPTO function enables an operator to offload certain types of traffic at a network node close to that UE's point of attachment to the access network. Page 2

  3. eFAP SIPTO support • SIPTO is enabled on per user, per APN basis tie to the operator’s configuration of HSGW and user subscription data in the HSS. • The HSGW selects the GWs (S-GW and P-GW) for SIPTO according to the PZID and/or the serving eFAP ID of the UE • There is no impact on eFAP and FGW • There is no impact on P-GW Page 3

  4. Thanks

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