بخشی از پاورپوینت
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اسلاید 1 :
مقدمه
آشنایی با اصطلاحات مورد استفاده در مقاله
آشنایی اجمالی با ساختار شبکه موبایل
ساختار NAT
بررسی تجربی یک آزمایش
ارزیابی و مقایسه چند نرم افزار در استفاده از روش P2P در انتقال ویدئو و صدا
اسلاید 2 :
نسل های موبایل
1G
2G
2.5 G
2.75G
3G
3G-324M
3G/UMTS
3GPP
ETSI
4G
نحوه انتقال صدا و داده در موبایل
اسلاید 3 :
Compared to 2G and 2.5G services, 3G allows simultaneous use of speech and data services and higher data rates (up to 14.4 Mbit/s on the downlink and 5.8 Mbit/s on the uplink with HSPA+).
To support mobile multimedia applications,3G had to deliver packet-switched data with better spectral efficiency, at far greater speeds
3G networks offer a greater degree of security than 2G predecessors.
3G networks use the KASUMI block crypto instead of the older A5/1 stream cipher.
اسلاید 4 :
3G-324M is the 3GPP umbrella protocol for video telephony in 3G mobile networks.
The 3G-324M protocol operates over an established circuit switched connection between two communicating peers.
3G-324M is an umbrella specification to enable conversational multimedia communication over Circuit Switched (CS) networks and has been adopted by the 3GPP. 3G-324M is based on the ITU-T H.324
اسلاید 5 :
ITU-T H.245 for call control
ITU-T H.223 for bit streams to data packets multiplexer/demultiplexer
ITU-T H.223 Annex A and B for error handling of low and medium BER detection, correction and concealment
ITU-T H.324 with Annexes A and C for operating in wireless environment
