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SIPTO (Selected Internet IP Traffic Offload) in LTE network

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Selected Internet IP Traffic Offload (SIPTO) enables routing of selected IP traffic through either the most optimal path in an operator’s core network or bypassing it completely. For example, an operator may decide to only offload best-effort services while still supporting VOIP calls over its core network.

Features:
Simultaneous support of SIPTO services and services via core network.
No user interaction or seamless offload
supports femto and macro network both
Mobility for offloaded sessions and service continuity between macro network and femto cells
Mobility in the case of roaming with agreement of operator

Advantages:
1. Low network congestion by offloading certain services
2. Low CAPEX and OPEX with fewer backhaul requirements, which are typically leased by most operators
3. Improved quality of experience for subscribers, hence improved consumer satisfaction, leading to better revenues

Will publish separate article on SIPTO Architecture...

posted Dec 26, 2013 by anonymous

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Nice summary :)
commented Dec 26, 2013 by Salil Agrawal


Related Articles

SIPTO/LIPA deployment architecture

LIPA - Local IP Access
SIPTO - Selected IP Traffic Offload.

Where LIPA is used to offload the IP traffic within the enterprise and completely avoiding the mobile core network or external internet for the Data traffic which can be accessed locally and provide the access of the same using the handheld device via Femto or EnodeB.

Whereas SIPTO is used to selectively offload the IP Traffic over internet by avoiding the mobile core network for the Data traffic.

In both the cases IP offloading is achieved by the introduction of LGW and following Table describes the possible architectural scenarios.

Typical Use Case

Case 1: LIPA
“Local IP Access” is the architecture that HeNB and a Local GW (L-GW) are in the residential/ enterprise IP network and can be achieved using a L-GW colocated with the HeNB.

Case 1

Case 2: SIPTO at the Local Network with L-GW function collocated with the (H)eNB
” SIPTO at the Local Network with L-GW function collocated with the (H)eNB “ is also the architecture that (H)eNB and a L-GW are in the residential/ enterprise IP network and also assumes a L-GW colocated with the (H)eNB. (Refer Figure for Case 1)

Case 3: SIPTO above RAN
“SIPTO above RAN” is the architecture that assumes both (H)eNB and a L-GW ( or LP-GW) in the mobile operator network.
Case 3

Case 4: SIPTO @LN (SGW and LGW colocated)
In this scenario LGW and eNB/HNB are separate nodes but located into enterprise/residential IP Network.

Case 4

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