1. © 2007 The MITRE Corporation. All rights reserved Exposing Services in a Disadvantaged Environment S. Semy, M. Sabbouh, J. Higginson, F. Dandashi {ssemy,ms,higginso,dandashi}@mitre.org February 27, 2007 Approved for Public Release (07-0267) Distribution Unlimited

2. © 2007 The MITRE Corporation. All rights reserved 2 How do SOAs enable solutions for disadvantaged users? Challenge Intermittent Connectivity Limited Bandwidth Heterogeneous Devices Limited Local Resources High Latency Warfighter Disaster Relief

3. © 2007 The MITRE Corporation. All rights reserved 3 By the way… supporting disadvantaged operations is not just a Government Problem! Parcel Delivery Services Health Care

4. © 2007 The MITRE Corporation. All rights reserved 4 Nonetheless… there are unique constraints within the Government:  Often severely constrained environments  Potentially bigger impact for getting it wrong  Bigger scale and less controlled environment

5. © 2007 The MITRE Corporation. All rights reserved 5 Services for Disadvantaged Environments MITRE’s Enterprise Systems Engineering Capstone Activity

6. © 2007 The MITRE Corporation. All rights reserved 6 Characterization Framework Data CenterGateway Dismounted Mobile Network Bandwidth Low Latency Resources (storage, computing, etc) Connectivity N/A No limitations Some limitations Severe limitations Disaster Relief Traffic Pattern

7. © 2007 The MITRE Corporation. All rights reserved 7 Edge Computing and Caching Data Synchronization Data Compression Rich Internet Apps (e.g. offline apps) Intermittent Connectivity Limited Bandwidth High Latency Heterogeneous Devices Limited Local Resources Dimensions Web Architectures and Technologies Applicable Web Architectures and Technologies DoD implementations need to leverage commercial solutions to the extent possible

8. © 2007 The MITRE Corporation. All rights reserved 8 Recommendations to the W3C n Candidate W3C Recommendations in support of asynchronous mode of operation of web applications –Browsers that support offline web applications –Protocols to synchronize cached data in browsers and servers –Standard markup language to tag pieces of the web that can be used offline n Standards to embed metadata (e.g. quality of service, discovery) in web pages, imagery, and video n Architectures to formalize the role of proxy servers to perform functions such as compression, caching, and routing n Architectures and standards to support subscription-based information delivery

9. © 2007 The MITRE Corporation. All rights reserved Backup

10. © 2007 The MITRE Corporation. All rights reserved 10 Dimensions

11. © 2007 The MITRE Corporation. All rights reserved 11 Characterization Framework Fully connected Dedicated communication lines Fully equipped Data center environment Mostly connected Shared network Adequate bandwidth High latency Largely disconnected for lengthy time periods Little/no processing and storage ability Data exchange in bursts and infrequently Frequent network disruption Shared communication across large users Mobility limits connectivity Bandwidth may be severely limited Noisy network Data Center Gateway Dismounted User Mobile Network