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Kommunikatsiooniteenuste arendusIRT0080
Loeng 5/2009
Avo Otstelekommunikatsiooni õppetool,
TTÜ raadio- ja sidetehnika [email protected]
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Video vooülekanne
Media Server (Pre-
Encoded Video)
Radio Network Controller
RNC
MAC Scheduling at Base Station
Mobile User Mobile User
High bandwidth
Time-varying with
limited data rates
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Mobiilside firmadelt algus...
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Ühildatavus
Access to people and information
GSM/UMTSdual-modeterminals
GSMterminals
UMTSterminals
GSMRadio Access
UMTSRadio Access
GSM/UMTSCore Network
Internet/Intranet +
PSTN/ISDN +
GRAN (Iu)A
Access toinformationand people(Data, Multi-
media)
Access topeople
(Voice, Video)
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GSM & UMTS
SD
Mobile Station
MSC/VLR
Base StationSubsystem
GMSC
Network Subsystem
AUCEIR HLR
Other Networks
GGSNSGSN
BTSBSC
NodeB
RNC
RNS
UTRAN
SIMME
USIMME
+
PSTN
PLMN
Internet
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Radio Resource Control (RRC)
Medium Access Control (MAC)
Transport channels - grouped by method of transport
Physical layer
Layer 3
Logical channels - grouped by information content
- User Data - Control and signaling
Layer 2
Layer 1
Air InterfaceDirect RRC control of the physical layer
Physical channels Physical Channels Distinguished by: - RF Frequency - Channelization Code - Spreading Code - Modulation (I/Q) Phase (uplink) - Timeslot (TDD mode)
UTRAN OSI Model
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Sagedusressurss (UMTS tarvis)
20 (35) MHz for TDD
2 * 60 MHz FDD
1850
19001950 2000 2050 2100 2150 2200 2250
20 20 60 30 15 30
DECT
MHz
GSM 1800
60
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Soft HandoverSoft Handover
UE
•UE (mobiil) ühendub mitme samal sagedusel töötava tugijaamaga•Vajame mitmekiirelist vastuvõtjat => RAKE
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SpreadingFactor
ChiprateMchips/s
User Bitratekbit/s
3,84
3,84
3,84
3,84
3,84
3,84
3,84
256
128
64
32
16
8
4
15
30
60
120
240
480
960
Bitikiirus kasutaja tarvis
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UMTS kasutus
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WCDMA (3G) ja WiMAX
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FDD või TDD
f
t
UL DL
Duplex gapf ff
t
UL
DL
2f
Guard
period
Frequency division duplex (FDD) Time division duplex (TDD)
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Sagedusalad ( ... aga)
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Hübriidlahendus
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Industry convergence
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IMS layered architecture
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GSM + teised võrgud
WirelinexDSLCATV
PS domain
SIP
SIP/H.323
SIP/H.323
3G-324M
GW
CS PLMN
WLAN
CS domain GSM
CDMA
WCDMA
EDGE
IPMultimedia
domain
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Interoperability
Vendor YVendor XA B
IMS GRX GRX IMS
Carrier Carrier
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GSM areng
GSM BSC GSM BSC
MGW
Connectivity backbone(IP, ..., TDM)
MSCServer
SGSNServer
SCP
Connectivity
Control
Services/Applications
HLR
Appl Servers
MGW GGSN
InternetIntranets
MGWPSTN/ISDN/
PLMN
MSCServer H.323
MGW
SIP
GSM BSC
PoC
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Juurdepääs
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I M S
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IMS in 3GPP Release 5Frozen in March 2002
• IP Multimedia Subsystem (IMS) - Phase 1, basic
– Basic architecture
– Session Initiation Protocol (SIP) control
– Session Definition Protocol (SDP) control
– …
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IMS in 3GPP Release 6Frozen in March 2005
• IP Multimedia Subsystem (IMS) - Phase 2, enhancements
– 3GPP enablers for services like Push to Talk over Cellular (PoC)
• Group Management
– Conferencing
– Messaging
– Interworking with CS networks
– Lawful intercept
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Lingid (5-1)http://www.3gpp.org/
http://www.3gpp2.org/
http://en.wikipedia.org/wiki/WCDMA
http://en.wikipedia.org/wiki/3G
http://www.umts.de./
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Lingid (5-2)http://www.openmobilealliance.com/
http://en.wikipedia.org/wiki/Next_Generation_Networking
http://en.wikipedia.org/wiki/Fixed-Mobile_Convergence_Alliance
http://en.wikipedia.org/wiki/IP_Multimedia_Subsystem
