Intorduction to the CALM Fast Service Advertisement Protocol (FSAP)!
The FSAP is specified in ISO 24102-5, which will be published early in 2013. Originally it was designed for usage together with FNTP, but it can be used with any kind of network & transport layer protocol. It supports
- Distribution of messages
- Sessions between peer entities
- 15628-like session initialisation phase
- WAVE-like session initialisation phase
- Non-IP based sessions with request and optional resonse messages
- IP-based sessions
- Lower layer communications with single-hop ad-hoc access technologies
- Service Advertisement/Announcement Message (SAM)
- a data frame
- a management frame (802.11p WAVE-like)
- Optional handover to other communication channels / other access technologies for the session operation phase
- Distributed implementations of ITS stations, i.e. ITS applications running in an ITS-S host unit, using access technolgies for lower layer communications available in an ITS-S router unit, where both units are interconnected with the ITS station-internal network
- Multiple instances of the same ITS application running in an ITS station.
FSAP is compliant with ITS-AID and Port Numbers specified in ETSI TS 102 860, developed in STF 404. TS 102 860 currently is being extended in the Project Team CEN TC278 WG18 PT1601 fundet by the European Commission under mandate M/453.
ETSI TC ITS WG2 aims on adopting FSAP in TS 102 890-2. A preliminary consenus is achieved in TC ITS WG2.