Re: [SR-Users] IMS: SMS over IP - how to get the originator's tel address?

I am working on a VoLTE/IMS scenario to transfer text messages as SMS over IP (+g.3gpp.smsip feature) between UE’s. This is a high-level view of the message flows between the endpoints (not showing CSCFs): UE1 IP-SM-GW |---- MESSAGE (SUBMIT) --------------->| |<------------------- 202 ACCEPTED ----| | | |<-------- MESSAGE (SUBMIT_REPORT) ----| |---- 200 OK ------------------------->| | UE2 | | | |<-------------- MESSAGE (DELIVER) ----| |---- 200 OK ------------------------->| The messages does get transferred from UE1 to UE2 successfully. Since this is GSM-style SMS, the OA (originating address) and DA (destination address) are specified using telephone numbers, not sip addresses. This is not a problem for the DA, since it is specified in the SUBMIT TPDU from the originating handset, but when the IP-SM-GW sends the DELIVER TPDU it needs to specify the OA so that the recipient knows who sent the SMS, and this was not provided in the MESSAGE with the SMS-SUBMIT. According to 3GPP TS 24.341 (http://www.qtc.jp/3GPP/Specs/24341-b20.pdf): "The IP-SM-GW will have to use an address of the SM-over-IP sender that the SC can process (i.e. an E.164 number). This address will come from a tel URI in a P-Asserted-Identity header (as defined in RFC 3325 [13]) placed in the SIP MESSAGE request by the P-CSCF or S-CSCF." Looking at the MESSAGE request sent from the S-CSCF to the IP-SM-GW, it looks like neither the P-CSCF nor the S-CSCF is providing the tel address in a P-Asserted-Identity header: MESSAGE tel:+3108012345680 SIP/2.0 Route: <sip:defaultapp@tas.core.ims1.test;lr>, <sip:iscmark@scscf.core.ims1.test :6060;lr;s=1;h=0;d=0;a=7369703a30303130333031323334353637383940696d732e6d6e633030332e6d63633030312e336770706e6574776f726b2e6f7267> P-Served-User: <sip:001030123456789@ims.mnc003.mcc001.3gppnetwork.org f: <sip:001030123456789@ims.mnc003.mcc001.3gppnetwork.org>;tag=2703358633 t: <tel:+3108012345680> CSeq: 555874977 MESSAGE i: 2703358625_2324045032@2001:470:eb88:b021:27f:9507:589d:c201 Via: SIP/2.0/UDP [2001:470:EB88:150:0:0:0:22]:6060;branch=z9hG4bKb857.bd3345ba81ec10b1d11639d9c7414606.0;i=a Via: SIP/2.0/TCP [2001:470:EB88:150:5054:FF:FE44:BFC9];branch=z9hG4bKb857.be53cc1c583b9c5f9dcebf3306f2b7c1.0 v: SIP/2.0/UDP [2001:470:eb88:b021:27f:9507:589d:c201]:8906;rport=8013;branch=z9hG4bK3552622488 Max-Forwards: 68 P-Access-Network-Info: 3GPP-E-UTRAN-FDD; utran-cell-id-3gpp=0010300030000001 c: application/vnd.3gpp.sms Allow: MESSAGE d: no-fork User-Agent: Xiaomi_Redmi 3S_Android6.0.1_9 l: 27 P-Charging-Vector: icid-value=49565300000000511100004B01000000; icid-generated-at=2001:470:EB88:150:5054:FF:FE44:BFC9 P-Asserted-Identity: < sip:001030123456789@ims.mnc003.mcc001.3gppnetwork.org> P-Visited-Network-ID: core.ims1.test Message Body GSM A-I/F RP - RP-DATA (MS to Network) Message Type RP-DATA (MS to Network) RP-Message Reference RP-Message Reference: 0x05 (5) RP-Originator Address RP-Destination Address - (3108012345680) RP-User Data Length: 14 TPDU (not displayed) GSM SMS TPDU (GSM 03.40) SMS-SUBMIT 0... .... = TP-RP: TP Reply Path parameter is not set in this SMS SUBMIT/DELIVER .0.. .... = TP-UDHI: The TP UD field contains only the short message ..1. .... = TP-SRR: A status report is requested ...0 0... = TP-VPF: TP-VP field not present (0) .... .0.. = TP-RD: Instruct SC to accept duplicates .... ..01 = TP-MTI: SMS-SUBMIT (1) TP-MR: 92 TP-Destination-Address - (8000) TP-PID: 0 TP-DCS: 0 TP-User-Data-Length: (5) depends on Data-Coding-Scheme TP-User-Data SMS text: HELLO Is this something that in configurable at the P-CSCF or the S-CSCF, or would it require now development? Thanks, Ron _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users