Microsoft Word Master master doc

B4: Sender can not deceive receiver to pay for any messages
 
Receiver is asked for charging confirmation by the TMMS PR. 

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4.1 TMMS Service based on IMS: : Overview 
Page 43 of 93 
4
TMMS Service based on IMS 
In this chapter we will first give a brief introduction of the IMS, which is the technology 
our end-to-end mobile service in this chapter is based on. This introduction is based on 
[xxx], and a more detailed reading about IMS can be found in [22]. We continue this 
chapter with presenting how we have chosen to design our IMS based service, before we 
end this chapter with an evaluation of the service we have designed, based on the criteria 
and scenarios given in 2.5. 
4.1
 
Overview 
IMS as defined by 3GPP is a technology intending to merge the Internet with the 
cellular world. It is architected to enable and enhance IP based multimedia services such 
as the web, email, instant messaging, presence, and videoconferencing, and make it 
available everywhere through the Universal Mobile Telecommunications System (UMTS)
network. 
4.1.1
 
Architecture 
IMS uses PS technology to perform data communication. By using this technology, the 
data transfer will be much faster than if Circuit Switched (CS) technology were to be 
used. 
The IMS services architecture gives the opportunity to deal with integrated services. It 
allows deployment of new services by operators and third party service providers. In this 
way a variety of services can be developed independently and at the same time utilize the 
common features of the IMS infrastructure. 

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4.1 TMMS Service based on IMS: : Overview 
Page 44 of 93