Retransmission procedure and apparatus for handshaking protocol
View Patent ↗A central communication apparatus that minimizes a retransmission of messages when an error message is received during a communication handshaking procedure. A receiver receives messages from a remote communication terminal during the communication handshaking procedure to detect whether an error message exists. If a predetermined number of error messages are detected by the receiver, a communication terminating section terminates a communication session.
1. A central communication apparatus that minimizes a retransmission of messages when an error message is received during a communication handshaking procedure, comprising:
a receiver that receives messages from a remote communication terminal, said receiver detecting whether an error message exists, during said communication handshaking procedure; and
a communication terminating section that terminates a communication session when a predetermined number of error messages are detected by said receiver.
2. The central communication apparatus of claim 1 , further comprising a retransmission requester that transmits a retransmission request message to the remote communication terminal when said receiver detects said error message.
3. The central communication apparatus of claim 2 , wherein said retransmission request message includes a last correctly received message.
4. The central communication apparatus of claim 3 , wherein a retransmission commences with a message immediately after the last correctly received message.
5. The central communication apparatus of claim 1 , wherein said predetermined number of error messages comprises three error messages.
6. The central communication apparatus of claim 2 , wherein said retransmission request message includes information related to a suggested length of a subsequent message frame to be transmitted to the central communication apparatus.
7. The central communication apparatus of claim 2 , wherein said retransmission request message includes information related to a frame number of a multi-segmented message.
8. The central communication apparatus of claim 3 , wherein said retransmission requester transmits a null message code to the remote communication apparatus instead of the last correctly received message, when said receiver does not receive an error free message during said communication handshaking procedure.
9. A method for minimizing a retransmission of messages in a communication session when an error message is received during a communication handshaking procedure, comprising:
receiving messages from a communication apparatus;
detecting whether an error message exists, during the communication handshaking procedure; and
terminating the communication session when a predetermined number of error messages are detected.
10. The method of claim 9 , further comprising transmitting a retransmission request message to the communication apparatus when the error message is detected.
11. The method of claim 10 , wherein the retransmission request message includes a last correctly received message.
12. The method of claim 11 , wherein a retransmission commences with a message immediately after the last correctly received message.
13. The method of claim 9 , wherein the predetermined number of error messages comprises three error messages.
14. The method of claim 10 , wherein the retransmission request message includes information related to a suggested length of a subsequent message frame.
15. The method of claim 10 , wherein the retransmission request message includes information related to a frame number of a multi-segmented message.
16. The method of claim 11 , further comprising transmitting a null message code to the communication apparatus instead of the last correctly received message when an error free message is not received during the communication handshaking procedure.
17. A method for minimizing a retransmission of messages in a communication session when an error message is received during a communication handshaking procedure, comprising:
determining whether an error message is received, during the communication handshaking procedure; and
terminating the communication session when a predetermined number of error messages are determined to have been received.
18. The method of claim 17 , further comprising transmitting a retransmission request message when each error message, less than the predetermined number of error messages, is determined to have been received.
19. The method of claim 18 , wherein the retransmission request message includes a last correctly received message.
20. The method of claim 19 , further comprising transmitting a null message code instead of the last correctly received message when an error free message is determined to not have been received during the communication handshaking procedure.