Download IP Multimedia Subsystem (IMS) Handbook by Mohammad Ilyas, Syed A. Ahson PDF

By Mohammad Ilyas, Syed A. Ahson

Take half sooner or later of Wireless/Wireline Convergence
The IP multimedia subsystem (IMS), verified because the beginning for destiny instant and wireline convergence, is the bedrock that might facilitate effortless deployment on new, wealthy, custom-made multimedia conversation providers that blend telecom and knowledge providers. Designers, planners, and researchers of conversation platforms might want to make complete use of the know-how taking place with this convergence in the event that they are looking to be those delivering finish clients with new and effective providers which are as economical as they're innovative.

To supply researchers and technicians with the instruments they should optimize their position during this communique revolution, the IP Multimedia Subsystem (IMS) Handbook offers all of the technical elements of the IMS had to aid the expansion of electronic site visitors and the implementation of underlying networks. This advisor covers every little thing from uncomplicated ideas to research-grade fabric, together with the long run path of the structure. prepared in 3 sections, the ebook brings jointly the technical savvy of fifty pioneering specialists from around the globe, supplying whole assurance of appropriate suggestions, applied sciences, and providers.

Learn How IMS Will pace Innovation
Filling the distance among current conventional telecommunications and web applied sciences, IMS has resulted in an atmosphere within which new companies and ideas are brought extra speedy than ever sooner than, akin to reusable provider parts and real-time integration. The know-how delivers to be an economical evolutionary route to destiny instant and wireline convergences that might meet next-generation carrier requirements.

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Sample text

This means that there should be no overlap between the service enablers, both from the user perspective and from the technical functions perspective. No overlap from the user perspective implies that different service enablers should not be responsible for the same type of user’s personal information. For example, only one service enabler can produce the presence information and only one service enabler can produce the location information. No overlap from the technical functions perspective implies that the different service enablers should not use the same IMS functions in an incoherent way.

The S-CSCF retrieves RES from the response and compares it with XRES 0. If verification is successful, the client has been authenticated and the user’s IMPU is registered in the S-CSCF. 5. The ISIM verifies the AUTN for network authenticity. The ISIM and the HSS keep track of sequence numbers SQNISIM and SQNHSS, respectively, for each round of authentication procedures. If the ISIM detects an authentication whose sequence number is out of range, it aborts the authentication and reports back to the network with a synchronization failure message, including correct sequence number 0.

Password guessing attack: This is like a session hijacking attack with the objective to get user session information. Even if an intruder is not able to break the IMS authentication process, he or she can launch a password-guessing attack in order to misuse the legitimate accounts of users. The intruder launches this attack by sending many REGISTER requests to P-CSCF and receives 401-unauthorized messages from the IMS core. The attacker could get 200 OK responses in a successful attack. SQL injection: This is a type of message-tampering attack; the text-based nature of SIP messages provides an opportunity for message-tampering attacks in IMS.

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