B.11 PRACK method

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

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

The table B.11.1 lists the supported header fields within the PRACK request.

Table B.11.1: Supported header fields within the PRACK request

Item	Header field	Ref.	RFC status	II-NNI condition
1	Accept	[13], [18]	o	do
2	Accept-Contact	[51]	o	do
3	Accept-Encoding	[13], [18]	o	do
4	Accept-Language	[13], [18]	o	do
5	Allow	[13], [18]	o	do
6	Allow-Events	[20]	o	IF table 6.1.3.1/23 THEN do (NOTE)
7	Authorization	[13], [18]	o	IF table 6.1.3.1/7 THEN do (NOTE)
8	Call-ID	[13], [18]	m	dm
9	Cellular-Network-Info	[5]	n/a	IF table 6.1.3.1/117 THEN do (NOTE)
10	Content-Disposition	[13], [18]	o	do
11	Content-Encoding	[13], [18]	o	do
12	Content-ID	[216]	o	IF table 6.1.3.1/122 THEN do
13	Content-Language	[13], [18]	o	do
14	Content-Length	[13], [18]	t	dt
15	Content-Type	[13], [18]	*	d*
16	CSeq	[13], [18]	m	dm
17	Date	[13], [18]	o	do
18	From	[13], [18]	m	dm
19	Max-Breadth	[79]	o	do
20	Max-Forwards	[13], [18]	m	dm
21	MIME-Version	[13], [18]	o	do
22	P-Access-Network-Info	[24], [24B]	o	IF table 6.1.3.1/36 THEN do (NOTE)
23	P-Charging-Function-Addresses	[24]	o	dn/a
24	P-Charging-Vector	[24]	o	IF table 6.1.3.1/38 THEN do (NOTE)
25	P-Early-Media	[74]	o	IF dc1 (CAT: clause 12.14) THEN dm ELSE IF table 6.1.3.1/69 THEN do (NOTE)
26	Priority-Share	[5]	n/a	IF home-to-visited request on roaming II-NNI AND table 6.1.3.1/118 THEN do (NOTE)
27	Privacy	[34]	o	do
28	Proxy-Authorization	[13], [18]	o	IF table 6.1.3.1/7 THEN do (NOTE)
29	Proxy-Require	[13], [18]	o	do
30	RAck	[18]	m	dm
31	Reason	[48]	o	IF table 6.1.3.1/40 THEN do (NOTE)
32	Record-Route	[13], [18]	o	do
33	Recv-Info	[39]	o	IF table 6.1.3.1/17 THEN do (NOTE)
34	Referred-By	[53]	o	do
35	Reject-Contact	[51]	o	do
36	Relayed-Charge	[5]	n/a	dn/a
37	Request-Disposition	[51]	o	do
38	Require	[13], [18]	c	dc
39	Resource-Priority	[78]	o	IF table 6.1.3.1/73 THEN do (NOTE)
40	Resource-Share	[5]	n/a	IF (home-to-visited request on roaming II-NNI OR visited-to-home request on roaming II-NNI) AND table 6.1.3.1/116 THEN do (NOTE)
41	Route	[13], [18]	c	dc
42	Session-ID	[124]	m	IF table 6.1.3.1/94 THEN dm (NOTE)
43	Supported	[13], [18]	o	do
44	Timestamp	[13], [18]	o	do
45	To	[13], [18]	m	dm
46	User-Agent	[13], [18]	o	do
47	Via	[13], [18]	m	dm
dc1: request invoked due to CAT to first 18x response with P-Early-Media header field cancelling "CAT service" provided by terminating AS AND (non-roaming II-NNI OR loopback traversal scenario OR home-to-visited request on roaming II-NNI)
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.11.2 lists the supported header fields within the PRACK response.

Table B.11.2: Supported header fields within the PRACK response

Item	Header field	SIP status code	Ref.	RFC status	II-NNI condition
1	Accept	415	[13], [18]	c	dc
2	Accept-Encoding	415	[13], [18]	c	dc
3	Accept-Language	415	[13], [18]	c	dc
4	Accept-Resource-Priority	2xx 417	[78]	o	IF table 6.1.3.1/73 THEN do (NOTE 2)
5	Allow	405	[13], [18]	m	dm
5	Allow	others	[13], [18]	o	do
6	Allow-Events	2xx	[20]	o	IF table 6.1.3.1/23 THEN do (NOTE 2)
7	Authentication-Info	2xx	[13], [18]	o	IF table 6.1.3.1/7 THEN do (NOTE 2)
8	Call-ID	100 r	[13], [18]	m	dm
9	Cellular-Network-Info	r	[5]	n/a	IF table 6.1.3.1/117 THEN do (NOTE 2)
10	Contact	3xx 485	[13], [18]	o	do
11	Content-Disposition	r	[13], [18]	o	do
12	Content-Encoding	r	[13], [18]	o	do
13	Content-ID	r	[216]	o	IF table 6.1.3.1/122 THEN do
14	Content-Language	r	[13], [18]	o	do
15	Content-Length	100 others	[13], [18]	t	dt
16	Content-Type	r	[13], [18]	*	d*
17	CSeq	100 others	[13], [18]	m	dm
18	Date	100 others	[13], [18]	o	do
19	Error-Info	3xx-6xx	[13], [18]	o	IF table 6.1.3.1/13 THEN do (NOTE 2)
20	From	100 others	[13], [18]	m	dm
21	MIME-version	r	[13], [18]	o	do
22	P-Access-Network-Info	r	[24], [24A], [24B]	o	IF table 6.1.3.1/36 THEN do (NOTE 2)
23	P-Charging-Function-Addresses	r	[24], [24A]	o	dn/a
24	P-Charging-Vector	100	[24], [24A]	o	dn/a
24	P-Charging-Vector	others	[24], [24A]	o	IF table 6.1.3.1/38 THEN do (NOTE 2)
25	P-Early-Media	2xx	[74]	o	IF table 6.1.3.1/69 THEN do (NOTE 2)
26	Priority-Share	2xx	[5]	n/a	IF home-to-visited response on roaming II-NNI AND table 6.1.3.1/118 THEN do (NOTE 2)
27	Privacy	r	[34]	o	do
28	Proxy-Authenticate	401 (NOTE 1)	[13], [18]	o	do
28	Proxy-Authenticate	407 (NOTE 1)	[13], [18]	m	dm
29	Record-Route	2xx	[13], [18]	o	do
30	Recv-Info	2xx	[39]	c	IF table 6.1.3.1/17 THEN dc (NOTE 2)
30	Recv-Info	others	[39]	o	IF table 6.1.3.1/17 THEN do (NOTE 2)
31	Relayed-Charge	r	[5]	n/a	dn/a
32	Require	r	[13], [18]	c	dc
33	Resource-Share	2xx	[5]	n/a	IF (home-to-visited response on roaming II-NNI OR visited-to-home response on roaming II-NNI) AND table 6.1.3.1/116 THEN do (NOTE 2)
34	Response-Source	3xx-6xx	[5]	n/a	IF table 6.1.3.1/121 THEN do (NOTE 2)
35	Retry-After	404 413 480 486 500 503 600 603	[13], [18]	o	do
36	Security-Server	421 494	[47]	n/a	dn/a
37	Server	r	[13], [18]	o	do
38	Session-ID	r	[124]	m	IF table 6.1.3.1/94 THEN dm (NOTE 2)
39	Supported	2xx	[13], [18]	o	do
40	Timestamp	r	[13], [18]	o	do
41	To	100 others	[13], [18]	m	dm
42	Unsupported	420	[13], [18]	m	dm
43	User-Agent	r	[13], [18]	o	do
44	Via	100 others	[13], [18]	m	dm
45	Warning	r	[13], [18]	o	do
46	WWW-Authenticate	401 (NOTE 1)	[13], [18]	m	dm
46	WWW-Authenticate	407 (NOTE 1)	[13], [18]	o	do
NOTE 1: The SIP status code is only applicable over the roaming II-NNI. NOTE 2: 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.