DICOM PS3.7 2017e - Message Exchange

9.3.4.4 C-MOVE Protocol Procedures
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#### 9.3.4.4 C-MOVE Protocol Procedures

The C-MOVE procedures are initiated by the invoking DIMSE-service-user issuing a C-MOVE request primitive. On receipt of the C-MOVE request primitive the DIMSE-C protocol machine shall:

- construct a Message conveying the C-MOVE-RQ

- send the Message using the P-DATA request service (see 8.1)

On receipt of a Message conveying a C-MOVE-RQ the DIMSE-C protocol machine shall issue a C-MOVE indication primitive to the performing DIMSE-service-user.

The DIMSE-C protocol machine shall:

- accept zero or more C-MOVE response primitives containing the status of Pending, issued by the performing DIMSE-service-user, followed by a single C-MOVE response primitive containing the final status

- for each C-MOVE response primitive containing the Pending status the DIMSE-C protocol machine shall:

  1. construct a Message conveying the (Pending) C-MOVE-RSP

  2. send the Message using the P-DATA request service (see 8.1)

- for the C-MOVE response primitive containing the final status the DIMSE-C protocol machine shall:

  1. construct a Message conveying the (final) C-MOVE-RSP

  2. send the Message using the P-DATA request service (see 8.1)

### Note

The C-MOVE indication primitive initiates a sub-operation identical to the C-STORE operation.

On receipt of a Message conveying a C-MOVE-RSP the DIMSE-C protocol machine shall:

- if the Message indicates the status of Pending, issue a C-MOVE confirmation primitive to the invoking DIMSE-service-user with a Pending status;

- if the Message indicates a final status, issue a C-MOVE confirmation primitive to the invoking DIMSE-service-user with a final status, thus completing the C-MOVE procedure

### Note

The C-MOVE procedures can be canceled at any time by the invoking DIMSE-service-user. This shall be accomplished by the invoking DIMSE-service-user issuing a C-CANCEL request primitive.

The performing DIMSE-service-user may return a C-MOVE-RSP with the status of Failed or Refused before the complete C-MOVE-RQ request Message has been completely transmitted by the invoking DIMSE-service-user (this is called an early failed response). Upon receipt of this Failed or Refused C-MOVE-RSP the invoking DIMSE-service-user may terminate the Message before it is completely sent (i.e., set the Last Fragment bit to 1 in a Data PDV for this Message, see Annex F). Following this, it may invoke another operation or notification. It is a protocol violation for an invoking DIMSE-service-user to set the Last Fragment bit to 1 before a C-MOVE-RQ Message has been completely transmitted if it has not received a Failed or Refused C-MOVE-RSP to that request.

### Note

When an Association is operating in asynchronous mode, it is possible for an invoking DIMSE-service-user to transmit several Messages before a response. Therefore, while sending a Message it may receive a response to a previously transmitted Message. In this case this response is not an early failed response because the related Message has already been sent.

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DICOM PS3.7 2017e - Message Exchange