DesignXMPP arch
Version 9 (Anonymous, 02/29/2012 12:32 pm)
| 1 | 1 | = XMPP gateway architecture = |
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| 2 | 1 | ||
| 3 | 9 | [[TOC(DesignXMPP_arch, depth=2)]] |
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| 4 | 9 | ||
| 5 | 4 | The architecture of the SIP-XMPP gateway can be modeled in two different ways: |
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| 6 | 1 | ||
| 7 | 4 | * Based on an XMPP component |
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| 8 | 4 | * Based on an XMPP server (using server-to-server communication) |
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| 9 | 1 | ||
| 10 | 4 | Both approaches are not mutually exclusive, they can both be implemented at the same time and decide which one to use with a configuration option to allow different deployment scenarios. |
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| 11 | 4 | ||
| 12 | 4 | == XMPP component based architecture == |
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| 13 | 4 | ||
| 14 | 5 | [[Image(xmppgw-arch-component.png)]] |
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| 15 | 2 | ||
| 16 | 5 | === Elements required === |
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| 17 | 3 | ||
| 18 | 5 | * XMPP server (ejabberd for example) |
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| 19 | 1 | * XMPP server plugin (divert stanzas to offline users to a given component) |
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| 20 | 1 | * SIP Application server which is also a XMPP component |
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| 21 | 1 | * SIP proxy (registration, AAA and routing) |
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| 22 | 4 | ||
| 23 | 4 | == XMPP server based architecture == |
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| 24 | 1 | ||
| 25 | 5 | [[Image(xmppgw-arch-server.png)]] |
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| 26 | 4 | ||
| 27 | 5 | === Elements required === |
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| 28 | 4 | ||
| 29 | 5 | * SIP Application server which is also a XMPP server |
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| 30 | 5 | * SIP proxy (registration, AAA and routing) |
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| 31 | 6 | ||
| 32 | 6 | == Chosen architecture == |
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| 33 | 6 | ||
| 34 | 6 | After experimenting with both models the chosen model to be implemented first is the '''XMPP server based architecture'''. The component based approach shall be added at a later time. |
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| 35 | 6 | ||
| 36 | 6 | The chosen model has a number of advantages / disadvantages: |
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| 37 | 6 | ||
| 38 | 6 | * Advantages |
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| 39 | 6 | * Less network elements involved |
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| 40 | 6 | * Full control over XMPP routing since the server is customized |
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| 41 | 6 | * No need for developing plugins for any XMPP server |
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| 42 | 6 | * Disadvantages: |
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| 43 | 6 | * Inability to use an XMPP client in the local domain |
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| 44 | 6 | ||
| 45 | 6 | The critical factor when making this choice is the fact that if a custom XMPP server is built all the routing logic can be customized without the need of running an extra XMPP server and writing a plugin for it. Thus, this approach is more sustainable over time. |
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| 46 | 7 | ||
| 47 | 8 | The aforementioned disadvantage would also disappear if the chosen library implemented accepting XMPP client connections, which is likely to happen in the future. |