Raqamli mobil aloqa

SMSC
DNS Server
MMSC
SMS-notification of
arrived MMS
WAP GW
IP
TCP
HTTP
UDP
IP between terminal and WAP GW IP-addresses
WAP
3.8-rasm. 
MMS bog‘lanuvchi qurilma.

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48
RTSP
TCP-session
IP-packets between mobile and streaming server (or GW)
IP-packets between mobile and steaming server (or GW)
UDP packets
RTP, RTCP
RTSP protocol is used for 
setting up and controlling 
streaming sessions
RTSP protocol includes commands 
like: DESCRIBE, SETUP, PLAY, 
PAUSE and TEARDOWN
Streaming
server
Actual media is carried on the RTP 
packets. RTCP protocol is used to 
control quality of RTP-flow
Once PLAY command
has beem received over RTSP,
actual media flov starts
3.9-rasm.
Audio/video ma’lumotlarini IP protokoli
orqali yuborish.
Yangi darajadagi tarmoqlarni qurishda oldingi infratuzilmaning 
aksariyat qismi saqlanib qoladi, lekin shu bilan birga BSlar uchun 
yangi uskunalarni sotib olish hamda yangi litsenziyalar olish 
uchun katta miqdorda mablag‘ sarflanishi talab qilinadi. UMTS 
tizimining GSM tizimidan asosiy farqi radioulanish tarmog‘ini 
(ingl. Radio Access Network 
– 
RAN)
umumiy ulanish prinsipida 
qurilishidadir. Bu UMTS tizimini birlashgan xizmatlar ko‘rsa-
tuvchi raqamli tarmoqlar — ISDN, Internet, GSM yoki boshqa 
UMTS tarmoqlari bilan o‘zaro ishlash imkonini beradi. UTRAN 
nomini olgan UMTS standarti radioulanish tarmog‘i “Tizimlar-
ning ochiq o‘zaro ishlash” modelining 
(ingl. Open Systems In-
terconnection
– 
OSI)
uchta quyi sathlarida ishlaydi, ulardan eng 
yuqorisini (uchinchi, tarmoq sathini) radioresurslarni boshqaruv-
chi tizim protokollari (RRC protokoli) tashkil etadi.