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Devices Descriptions for Context-Based Content Adaptation

Devices Descriptions for Context-Based Content Adaptation. Reporter :Wei-Zhi Chen. Outline. CC/PP (Composite Capability / Preference Profiles) Introduction Device Representation. CC/PP.

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Devices Descriptions for Context-Based Content Adaptation

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  1. Devices Descriptions for Context-Based Content Adaptation Reporter :Wei-Zhi Chen

  2. Outline • CC/PP (Composite Capability / Preference Profiles) • Introduction • Device Representation

  3. CC/PP • CC/PP架構的目的主要是用來指明客戶端設備(如NoteBook, PDA)如何表達它們的能力以及偏好設定給來源伺服器(From user agent to origin server)，而來源伺服器則可以根據user agent profile來提供最適合的內容給客戶端設備。

  4. CC/PP client server • 我們要把內容傳送給不同的裝備 • Client 端的device必須告訴web什麼? • 他的能力 • 偏好設定 client client

  5. The Basic Concept of CC/PP

  6. CC/PP • 通常一個CC/PP設置文件(profile)會被建構成一個2層的hierarchy • 一個設置文件含有至少一個或多個元件(components) • 每個元件含有至少一個或多個屬性(attributes) Profile <Device xsi:type="MonitorType"> <xsi:displayWidth>320</xsi:displayWidth> <xsi:displayHeight>200</xsi:displayHeight>

  7. Introduction • For the video transmission, besides the concern with bandwidth needs, there is a problem when considering different device characteristics, such as display • Personal computer v.s. PDAs

  8. Introduction • The difficulty imposed by CC/PP specification is that it does not describe composition of devices. • For example , to describe a person is nature describe identity information.

  9. Introduction CC/PP author name user id identity id

  10. Introduction • Besides that, CC/PP does not define a range of values that an attribute may be assigned. • For example, a vendor could assign the value ”keypad” to the attribute keyboard, while another vendor could assign the value “TelephonePad” to the same attribute, when both represent the same functionality.

  11. Device Representation • Devices are defined based on the four conceptual abstract type • Identity • Location • Time • Activity

  12. Device Representation

  13. Device Representation • The most significant improvement necessary to describe device is related identity. • An application might need to know which device a user is using to access data. • They can be identified using the <DeviceID> element.

  14. Device Representation

  15. Device Representation • Although <DeviceID> can be used to identify a device, it does not given us any information about the device’s features. • We need to define SpecTypes such as storage (StorageType), speed (SpeedType), connector (ConnectorType), and others.

  16. Device Representation

  17. Device Representation restrict to a fixed range Basic characteristic of MemType

  18. Device Representation SpeedType definition

  19. Device Representation

  20. Device Representation

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