Results for area 5.4 Communication behaviour
DATEX-ASN mechanism in which the client acknowledges the receipt of a publication (reply)
data packet sent to indicate that the sending system is still alive and communicating
maximum amount of time a system is given to provide an appropriate response to the incoming data packet
maximum duration a system is required to wait for a response data packet prior to assuming that the previously sent data packet was never received by the other application
rules which specify the representation during transfer of the values of ASN.1 types
NOTE 1 Encoding rules also enable the values to be recovered from the representation, given knowledge of the type.
NOTE 2 For the purpose of specifying encoding rules, the various referenced type (and value) notations, which can provide alternative notations for built-in types (and values), are not relevant.
set of services which are responsible for providing a virtually error-free, point-to-point connection so that host A can send data packets to host B and they will arrive uncorrupted
NOTE Connection-oriented transport profiles may also ensure that the data packets arrive in the correct order.
service that provides end-system to end-system communications without any connection set-up
EXAMPLE UDP/IP.
service that allows one end-system to exchange a continuous stream of data with another end-system, the data of which is guaranteed to be delivered in the same order in which it was sent without any duplication
NOTE This service is typically achieved by first establishing a connection, then sending the data, and finally terminating the connection.
EXAMPLE TCP/IP.
data packet which is prepared by one system in order to control some function(s) of another system
NOTE Commands may be conveyed as a subscription (request) or publication (reply) depending on the design of the specific data exchange.
reply data which have been prepared by a server, usually in response to a subscription
NOTE In some cases, a publication may be termed a “reply” or a “response”.
DATEX-ASN publication (reply) that is sent directly over the given transport profile, in contrast with a file publication
DATEX-ASN publication (reply) that is stored on the server’s file system until the client has an opportunity to retrieve it via a file transfer protocol, in contrast with datagram publication
direction of travel of a target within the detection zone
request data packet which is prepared by a client in order to request current or future publication(s)
NOTE In some cases, a subscription may be termed a “request”.
to ignore a data packet
NOTE A data packet that is silently dropped does not cause any action to occur within the receiving system, nor is any response sent to the subject data packet.