A Taxonomy of Service Discovery Systems

Service Discovery – A Survey and Comparison

“…According to [6] [7], the objective of a service discovery mechanism is to develop a highly dynamic infrastructure where users would be able to seek particular services of interest, and service providers offering those services would be able to announce and advertise their capabilities to the network . Furthermore, service discovery minimize human intervention and allows the network to be self-healing by automatic detection of services which have become unavailable.…”

Service Discovery – A Survey and Comparison

“…According to [6] [7], the objective of a service discovery mechanism is to develop a highly dynamic infrastructure where users would be able to seek particular services of interest, and service providers offering those services would be able to announce and advertise their capabilities to the network . Furthermore, service discovery minimize human intervention and allows the network to be self-healing by automatic detection of services which have become unavailable.…”

“…• Configuration Purge Allows detection of disconnected entities through (a) leasing and (b) advertisement time-to-live (TTL) [7]. In leasing, the service provider requests and maintains a lease with the directory, and refreshes it periodically.…”

“…Query approach: allows users to discover services that satisfy their requirement. To do this, users initiates (a) unicast query to the directory, or (b) multicast query [7]. The query is expressed using the description language [6], and specifies the details about service it is looking for.…”

“…• Consistency Maintenance: Allows users to be aware when services change their characteristics. Updates can be propagated using (a) push-based update notification, where users and directories receive notifications from the service provider, or (b) pull-based polling for updates by the user to the directory or service provider for a fresher service description [7].…”