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Figure 6-9: Streaming retrieval of MM 

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6.2 TMMS Service based on OSA Parlay X Web Services: : Design 
Page 80 of 93 
6.2.5.6
 
S05: TMMS Client Unregistration 
When the client sends a 
StopMessageNotificationRequest
the TMMS PR WS performs the 
unregistration, as described in 3.2.5.6. 
Figure 6-10: Client deregistration 
6.2.6
 
Charging of Service Usage 
Since the TMMS PR WS acts on the behalf of the client, the client will be charged per 
the charging model in section 3.2.6.1. 
If the client includes 
ChargingInformation
in the 
SendMessageRequest
then the TMMS PR WS 
will transform that structure into a CDR which will be used by the TMMS PR to charge 
the recipient. 

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6.3 TMMS Service based on OSA Parlay X Web Services: : Evaluation 
Page 81 of 93 
6.3
 
Evaluation 
6.3.1
 
Security 
Table 6-1: Evaluation of Security quality attribute for TMMS Service based on OSA Parlay X Web 
Services 
S1: Service is available for legitimate use and sustains Denial of Service attacks 
Availab
ilit
y 
Configuration issue. Need to know which server to contact. 
S2: Data is not altered during transmission 
In
tegr
it
y 
On top of OSA API security, TMMS PR WS ensures integrity by using XML 
Digital Signature. 
S3: Sender and receiver confirms that they are who they claim to be
Authe
ntication 
Client gets authenticated by the service when it registers to the service. 
S4: Only authorized users get access to the service 
Authorization 
TMMS PR WS needs to check with TMMS PR if client is authorized to use the 
service. 
S5: Only sender and the intended destination part is able to know the content of 
the message