Dòng chảy giao dịch cho việc chuyển giao của một tin nhắn qua giao diện MM4 được thể hiện trong hình 6,49. Các yêu cầu bao gồm các yếu tố thông tin / các thông số được liệt kê trong Bảng 6,40. Nếu được yêu cầu của các MMSC khởi, MMSC người nhận thừa nhận các yêu cầu về phía trước với một phản ứng về phía trước ( phản ứng). Các phản ứng này bao gồm các yếu tố thông tin / các thông số được liệt kê trong Bảng 6,41. . | 336 Mobile Messaging Technologies and Services Presence and Instant Messaging Protocol PRIM SIP for Instant Messaging and Presence Leveraging Extensions SIMPLE SIMPLE is an IMPS protocol based on the Session Initiation Protocol SIP RFC-3261 and is particularly well suited for UMTS phase 2. SIMPLE defines a mechanism for subscribing to a service which manages subscriber status changes over a SIP network. The Wireless Village Initiative was recently set up by several manufacturers to consider the support of IMPS in the mobile environment. The prime objective of this initiative is to develop an industry standard to guarantee interoperability between various IMPS services that could be deployed in the near future. The IMPS model proposed by the Wireless Village includes four primary features Presence this feature manages information such as device availability . mobile device has been switched on off voice call under progress user status . available not available having a meeting user location mobile device capabilities personal status moods . happy angry etc. To ensure confidentiality presence information is provided according to user instructions only. Immediate Messaging this feature allows the exchange of messages delivered instantaneously to the recipient s . This means that upon sending by the originator the message is perceived as being immediately delivered to the message recipient s . Compared with traditional messaging services instant messaging allows the establishment of interactive messaging sessions between users. These sessions are usually displayed using a threaded conversational interface also known as chat. Groups this feature allows users to create and manage their own groups. The manager of a group can invite other users to chat with the group members. Network operators can create general interest groups. Shared Content this feature provides users with storage zones where pictures audio and other multimedia contents can be posted and .
