B.2 Introduction

24.3413GPPRelease 18Stage 3Support of SMS over IP networksTS

B.2.1 General

The signalling flows provided in this annex follow the methodology developed in 3GPP TS 24.228 [9]. The following additional considerations apply:

a) 3GPP TS 24.228 [9] shows separate signalling flows with no configuration hiding between networks, and with configuration hiding between networks. There is no SMS over IP specific functionality associated with this hiding, and therefore such separate signalling flows are not show in the present document; and

b) 3GPP TS 24.228 [9] does not show the functionality between the S-CSCF and the AS. As the SMS over IP functionality depends on the functionality provided by an AS, the signalling flows between S-CSCF and AS are shown in the present document.

B.2.2 Key required to interpret signalling flows

The key to interpret signalling flows specified in 3GPP TS 24.228 [9] clauses 4.1 and 4.2 applies with the additions specified below.

– ipsmgw.home1.net, ipsmgw.home2.net: IP-SM-GW in the home network of the SM-over-IP sender/receiver;

– sc.home1.net: PSI of the SC of the SM-over-IP sender

– user1_public1@home1.net: SM-over-IP sender; and

– user2_public2@home2.net: SM-over-IP receiver.

As in 3GPP TS 24.228 [9], in order to differentiate between SIP methods and other protocol messages, the message name is preceded with the associated protocol for all non-SIP messages.

Each signalling flow table contains descriptions for headers where the content of the header is new to that signalling flow, as is already performed in 3GPP TS 24.228 [9].

However, 3GPP TS 24.228 [9] includes extensive descriptions for the contents of various headers following each of the tables representing the contents of the signalling flows. Where the operation of the header is identical to that shown in 3GPP TS 24.228 [9], then such text is not reproduced in the present document.

Additional text may also be found on the contents of headers within 3GPP TS 24.228 [9] in addition to the material shown in the present document.