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HELD-02

HELD-02. James Winterbottom. What is HELD?. HELD is an application layer location acquisition protocol Designed to provide location in the form of a PIDF-LO while remaining access agnostic. Supports mobile, nomadic and static users Complies with RFC-3693 requirements for a using-protocol

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HELD-02

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  1. HELD-02 James Winterbottom

  2. What is HELD? • HELD is an application layer location acquisition protocol • Designed to provide location in the form of a PIDF-LO while remaining access agnostic. • Supports mobile, nomadic and static users • Complies with RFC-3693 requirements for a using-protocol • Supports delivery of location by-value, and location by-reference • Supports location assertion

  3. A Service View

  4. Changes to HELD • Draft format changed to be task oriented describing what parameters should be set for specific types of operations. • Changed terminology to be inline with RFC-3963 • Removed OBO • Moved examples to main body of document. Corrected and added more examples.

  5. What’s New • Tentatively added SLP as a service discovery technique based on comments from last IETF. • Added using HELD to talk with LG. • Added using HELD for LS to LS comms • Speculatively added LERO • Added identity parameters and extension parameters.

  6. Some misconceptions • HELD discovery is intended to support the finding of the LS for an arbitrary Target. • HELD discovery is intend for a Target to find the LS in its administrative domain. The Target may then provide recipients or other nodes with a locationURI from which they may acquire location from the LS on request.

  7. Some misconceptions • HELD location acquisition introduces overheads vs layer 2 techniques. • The LS serving the access network must be discovered. This is a one time operation. Once discovered the LS may be queried many times without requiring LS re-discovery.

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