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WLAN-GPRS INTEGRATION FOR NEXT-GENERATION MOBILE DATA NETWORKS

WLAN-GPRS INTEGRATION FOR NEXT-GENERATION MOBILE DATA NETWORKS. 通訊工程所 蔡名岳 692430028. WLAN-GPRS INTEGRATION FOR NEXT-GENERATION MOBILE DATA NETWORKS. A TIGHT COUPLING ARCHITECTURE. A LOOSELY COUPLED ARCHITECTURE. WLAN-GPRS INTEGRATION FOR NEXT-GENERATION MOBILE DATA NETWORKS.

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WLAN-GPRS INTEGRATION FOR NEXT-GENERATION MOBILE DATA NETWORKS

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  1. WLAN-GPRS INTEGRATION FOR NEXT-GENERATION MOBILE DATA NETWORKS 通訊工程所 蔡名岳 692430028

  2. WLAN-GPRS INTEGRATION FOR NEXT-GENERATION MOBILE DATA NETWORKS

  3. A TIGHT COUPLING ARCHITECTURE

  4. A LOOSELY COUPLED ARCHITECTURE

  5. WLAN-GPRS INTEGRATION FOR NEXT-GENERATION MOBILE DATA NETWORKS • Integrated WLAN ANDCellular Data Networks offers • ROAMING • SESSION MOBILITY • ENHANCED MOBILE APPLICATIONS • 3MOG:Mobile Massive Multiplayer Game • Mobile virtual environment

  6. Enhanced Mobile Application and The Challenge • ENHANCED MOBILE APPLICATIONS • 3MOG:Mobile Massive Multiplayer Game • Mobile Meetings • The Challenge :latency and state synchronize • GPRS networks have very high latencies typically measured in 1~2 seconds. • Latency in network for PC games is measured in hundreds of milliseconds.

  7. Time Management in an IntegratedMobile Data Networks • Time Management:有效的控制網路上訊息傳遞的延遲時間，以達到虛擬環境的邏輯時間與真實世界的實體時間逹成一致 • time-stepped • event-driven

  8. Time-Stepped Simulation(Time Evolution with Time-Stepped simulation) Federate’s logical time Minimum allowed time stamp t+4s t+3s Logical Time t+2s Grant t+s TAR Grant TAR t Grant TAR Grant Wall Clock Time TAR: time advance requestGrant: time advance grant

  9. Time Evolution with Two Federates Manager’s logical time Manager’s minimum allowed time stamp Logical Time Transport federate’s logical time Transport federate’s minimum allowed time stamp 11.Transport TAR t+4s 7.Manager TAR 12.Manager Grant t+3s 10.Manager TAR t+2s 9.Manager Grant t+s 8.Transport grant 6.Manager grant t 5.Transport TAR 4.Manager TAR t-s 3.Manager grant 2.Transport grant Wall Clock Time 1.Manager TAR

  10. Time Evolution with Event-Driven Simulation Federate’s logical time Minimum allowed time stamp t+2 Logical Time t+1 Grant to t+1.5 NER to t+2 t Grant to t+1 NER to t+1 Grant Wall Clock Time NER: Next Event RequestGrant: time advance grant

  11. Time-Stepped and Event-Driven Simulation Manager’s logical time Manager’s minimum allowed time stamp Production federate’s logical time Logical Time Production federate’s output time 4.enqueue t+1.5s t+2s 3.Manager grant to t+s 9.Manager grant to t+2s t+s 8.Production NER to t+3.5s t 7.Production Grant to t+1.5s 2.Production NER to t+2s 6.Production receive t+1.5s 1.Manager TAR to t+s 5.Manager TAR to t+2s Wall Clock Time

  12. Mobile Massive Multiplayer Game • TibiaME

  13. Mobile virtual environment

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