Services Sự hiện diện và tin nhắn tức thời đang thay đổi mô hình truyền thông cá nhân và doanh nghiệp. Sự hiện diện sẽ tăng cường nhắn tin cũng như giới thiệu một dịch vụ mới (dịch vụ hiện diện của chính nó) có thể được sử dụng trong nhiều ứng dụng và dịch vụ khác. Sự hiện diện sẽ là trái tim của tất cả các thông tin liên lạc và cách thức mới cho điện thoại hoạt động. Sự hiện diện cũng sẽ là một cơ hội kinh doanh sinh lợi cho cả hai nhà khai thác. | Part II Services The IMS IP Multimedia Concepts and Services Second Edition Miikka Poikselka Georg Mayer Hisham Khartabil and Aki Niemi 2006 John Wiley Sons Ltd. ISBN 0-470-01906-9 4 Presence Presence and instant messaging are changing the personal and corporate communications paradigm. Presence will enhance messaging as well as introduce a new service the presence service itself that can be used in many other applications and services. Presence will be the heart of all communications and the new way for telephony to function. Presence will also be a lucrative business opportunity for both operators and service providers. Presence is a dynamic profile of the user which is visible to others and used to represent oneself share information and control services. Presence can be seen as a user s status as perceived by others and others status as perceived by the user. Status may contain information such as personal and device status location or context terminal capabilities preferred contact method as well as services the user is willing to use to communicate with others including voice video instant messaging as well as gaming. Presence information is also personal it ừ alwyys iinked to a particular person. It shows the person initiating the communication whether the other person is available and willing to communicate. On the other hand presence information can be used to communicate to others when a person is able and willing to communicate as well as with whom and by what means. This will allow users to control their own communication more effectively. Presence information sharing raises security and privacy concerns. Using Session Initiation Protocol SIP for presence users can control their own specific presence information and have the final say on how it is used including who can and cannot see certain parts if not all of the presence information. Who will use the presence service There will be many different user groups which will use presence information .
