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Commit 5a2d6b11 authored by Raphael Defosseux's avatar Raphael Defosseux
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DOC: adding PGW 

Signed-off-by: default avatarRaphael Defosseux <raphael.defosseux@openairinterface.org>
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docs/FEATURE_SET.md
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3. [OpenAirInterface Core Network Deployment](#3-oai-core-network-deployment)
4. [OpenAirInterface SPGW-CUPS Fundamentals](#4-oai-spgw-cups-fundamentals)
5. [OpenAirInterface SGW Feature List](./FEATURE_SET_SGW.md)
6. [OpenAirInterface PGW Feature List](./FEATURE_SET_PGW.md)
# 1. OpenAirInterface Core Network Block Diagram #
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docs/FEATURE_SET_PGW.md 0 → 100644
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<table style="border-collapse: collapse; border: none;">
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<a href="http://www.openairinterface.org/">
<img src="./images/oai_final_logo.png" alt="" border=3 height=50 width=150>
</img>
</a>
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<td style="border-collapse: collapse; border: none; vertical-align: center;">
<b><font size = "5">OpenAirInterface Core PDN Gateway Feature Set</font></b>
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</table>
**Table of Contents**
1. [PGW Fundamentals](#1-pgw-fundamentals)
2. [OAI PGW Available Interfaces](#2-oai-pgw-available-interfaces)
3. [OAI PGW Conformance Functions](#3-oai-pgw-conformance-functions)
# 1. PGW Fundamentals #
(from [Wikipedia.org](https://en.wikipedia.org/wiki/System_Architecture_Evolution))
The Packet Data Network Gateway provides connectivity from the UE to external packet data networks by being the point of exit and entry of traffic for the UE.
A UE may have simultaneous connectivity with more than one PGW for accessing multiple PDNs.
The PGW performs:
- Policy enforcement,
- Packet filtering for each user,
- Charging support,
- Lawful interception and
- Packet screening.
Another key role of the PGW is to act as the anchor for mobility between 3GPP and non-3GPP technologies such as WiMAX and 3GPP2 (CDMA 1X and EvDO)
# 2. OAI PGW Available Interfaces #
| **ID** | **Interface** | **Status** | **Comments** | **Protocols** |
| ------ | ------------- | ------------------ | ---------------------------------------------- | ------------- |
| 1 | S5 / S8 | :heavy_check_mark: | Available on control plane only. | GTP-based |
| 2 | Gx | :x: | Policy | |
| 3 | Gy | :x: | Charging | |
| 4 | SGi | :heavy_check_mark: | | |
# 3. OAI SGW Conformance Functions #
Based on document **3GPP TS 23.401 V15.5.0 §4.4.3.3**.
| **ID** | **Classification** | **Status** | **Comments** |
| ------ | ------------------------------------------------------------ | ------------------ | ---------------------------------------------- |
| 1 | Per-user based packet filtering (ie deep packet inspection) | :heavy_check_mark: | |
| 2 | Lawful Interception | :x: | |
| 3 | UE IP address allocation | :heavy_check_mark: | Pools of IP addresses |
| 4 | Transport level packet marking in the uplink and downlink | :x: | |
| 5 | Accounting for inter-operator charging | :x: | |
| 6 | UL and DL service level charging as defined in TS 23.203 | :x: | |
| 7 | Interfacing OFCS through | :x: | |
| 8 | UL and DL service level gating control | :x: | |
| 9 | UL and DL service level rate enforcement | :x: | |
| 10 | UL and DL rate enforcement based on APN-AMBR | :x: | |
| 11 | DL rate enforcement based on the accumulated MBRs of the | :x: | |
| | aggregate of SDFs with the same GBR QCI | | |
| 12 | DHCPv4 (server and client) and DHCPv6 (client and server) | :x: | |
| 13 | The network does not support PPP bearer type | :x: | |
| 14 | The PDN GW may support Non-IP data transfer | :x: | |
| 15 | Packet screening | :x: | |
| 16 | Sending of one or more "end marker(s)" to the source SGW | :x: | |
| | immediately after switching the path during SGW change | | |
| 17 | PCC related features (e.g. involving PCRF and OCS) | :x: | |
| 18 | UL and DL bearer binding as defined in TS 23.203 | :x: | |
| 19 | UL bearer binding verification as defined in TS 23.203 | :x: | |
| 20 | Functionality as defined in RFC 4861 | :x: | |
| 21 | Accounting per UE and bearer | :x: | |
docs/FEATURE_SET_SGW.md
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| | and optionally Paging Policy Differentiation | | |
| 5 | Lawful Interception | :x: | |
| 6 | Packet routing and forwarding | :heavy_check_mark: | |
| 7 | Transport level packet marking in the uplink & the downlink | :x: | |
| | e.g. setting the DiffServ Code Point, based on the QCI, and | | Could be supported |
| 7 | Transport level packet marking in the uplink & the downlink | :x: | Could be supported |
| | e.g. setting the DiffServ Code Point, based on the QCI, and | | |
| | optionally the ARP priority level, of the associated EPS bearer | | |
| 8 | Accounting for inter-operator charging. | :x: | |
| | -- For GTP based S5/S8, the SGW generates accounting data per UE and bearer | | |
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