User's Manual

OPERATION 5
39
HF80 Transponder Reader – HSMS, Release 1.3
5.5.1 HSMS Message Exchange Procedures
HSMS defines the procedures for all message exchanges between
entities across the TCP/IP connection established according to the
procedures in the previous section. As explained in the overview, once
the connection is established, the two entities establish HSMS
communications with the Select procedure. The data messages may be
exchanged in any direction at any time. When the entities wish to
finish HSMS communication, the Deselect or Separate procedure is
used to terminate the HSMS communication.
Active
Entity
Passive
Entity
TCP/IP Connect
TCP/IP Accept
Connect
CONNECT
Accept
Send
Send
Receive
Receive
Select.req
Select.rsp
T6
T7
DATA
Send
Send
Receive
Receive
HSMS SECS-II
Message
(Primary)
HSMS SECS-II
Message (reply)
T3