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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.
