B.5 CANCEL method

29.1653GPPInter-IMS Network to Network Interface (NNI)Release 18TS

The table B.5.1 lists the supported header fields within the CANCEL request.

Table B.5.1: Supported header fields within the CANCEL request

Item	Header field	Ref.	RFC status	II-NNI condition
1	Accept-Contact	[51]	o	do
2	Authorization	[13]	o	IF table 6.1.3.1/7 THEN do (NOTE)
3	Call-ID	[13]	m	dm
4	Content-Length	[13]	t	dt
5	Content-Type	[13]	*	IF table 6.1.3.1/20 THEN do (NOTE)
6	CSeq	[13]	m	dm
7	Date	[13]	o	do
8	From	[13]	m	dm
9	Max-Breadth	[79]	o	do
10	Max-Forwards	[13]	m	dm
11	Privacy	[34]	o	do
12	Reason	[48]	o	IF dc1 (CW: clause 12.7) THEN dm ELSE IF table 6.1.3.1/40 THEN do (NOTE)
13	Record-Route	[13]	o	do
14	Reject-Contact	[51]	o	do
15	Request-Disposition	[51]	o	do
16	Resource-Priority	[78]	o	IF table 6.1.3.1/73 THEN do (NOTE)
17	Route	[13]	c	dc
18	Session-ID	[124]	m	IF table 6.1.3.1/94 THEN dm (NOTE)
19	Supported	[13]	o	do
20	Timestamp	[13]	o	do
21	To	[13]	m	dm
22	User-Agent	[13]	o	do
23	Via	[13]	m	dm
dc1: request invoked due to CW at the expiry of the "CW timer"
NOTE: If the capability specified in table 6.1.3.1 is not supported over the II-NNI, the IBCF in the receiving network can omit or modify the SIP header fields in the received SIP message prior to forwarding the SIP message as specified in 3GPP TS 24.229 [5] clause 5.10.6.2.

The table B.5.2 lists the supported header fields within the CANCEL response.

Table B.5.2: Supported header fields within the CANCEL response

Item	Header field	SIP status code	Ref.	RFC status	II-NNI condition
1	Accept-Resource-Priority	2xx 417	[78]	o	IF table 6.1.3.1/73 THEN do (NOTE)
2	Call-ID	r	[13]	m	dm
3	Content-Length	r	[13]	t	dt
4	CSeq	r	[13]	m	dm
5	Date	r	[13]	o	do
6	Error-Info	3xx-6xx	[13]	o	IF table 6.1.3.1/13 THEN do (NOTE)
7	From	r	[13]	m	dm
8	Privacy	r	[34]	o	do
9	Record-Route	2xx	[13]	o	do
10	Response-Source	3xx-6xx	[5]	n/a	IF table 6.1.3.1/121 THEN do (NOTE)
11	Retry-After	404 413 480 486 500 503 600 603	[13]	o	do
12	Session-ID	r	[124]	m	IF table 6.1.3.1/94 THEN dm (NOTE)
13	Supported	2xx	[13]	o	do
14	Timestamp	r	[13]	o	do
15	To	r	[13]	m	dm
16	User-Agent	r	[13]	o	do
17	Via	r	[13]	m	dm
18	Warning	r	[13]	o	do
NOTE: If the capability specified in table 6.1.3.1 is not supported over the II-NNI, the IBCF in the receiving network can omit or modify the SIP header fields in the received SIP message prior to forwarding the SIP message as specified in 3GPP TS 24.229 [5] clause 5.10.6.2.