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| WAP
Push Architecture with Proxy |
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| Gateway |
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| n | Push
Access Protocol |
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| – | Content
transmission between server and PPG |
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| – | First
version uses HTTP |
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| n | Push
OTA (Over The Air) Protocol |
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| – | Simple,
optimized |
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| – | Mapped
onto WSP |
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| Push
Proxy |
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| Gateway |
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| Push OTA |
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| Protocol |
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| Client |
| Push
Initiator |
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| Server |
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| application |
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| User Agents |
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| Coding, |
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| checking |
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