Kommunikatsiooniteenuste arendus IRT0080

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Kommunikatsiooniteenuste arendusIRT0080

• Loeng 6/2008
• Avo Otstelekommunikatsiooni õppetool,
• TTÜ raadio- ja sidetehnika inst.avo.ots_at_ttu.ee

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Video vooülekanne
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Mobiilside firmadelt algus...
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Ühildatavus
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GSM UMTS
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UTRAN OSI Model
Radio Resource Control (RRC)
Layer

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Logical channels - grouped by information
content - User Data - Control
and signaling
Layer

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Medium Access Control (MAC)
Transport channels - grouped by method of
transport
Physical layer
Layer

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Physical channels Physical Channels
Distinguished by - RF Frequency
- Channelization Code - Spreading Code
- Modulation (I/Q) Phase (uplink) -
Timeslot (TDD mode)
Direct RRC control of the physical layer
Air Interface
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Sagedusressurss (UMTS tarvis)
1900
1850
1950
2000
2050
2100
2150
2200
2250
MHz
20
20
60
30
15
30
60
DECT
GSM 1800
2 60 MHz FDD
20 (35) MHz for TDD
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Soft Handover
UE

• UE (mobiil) ühendub mitme samal sagedusel töötava
  tugijaamaga
• Vajame mitmekiirelist vastuvõtjat gt RAKE

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Bitikiirus kasutaja tarvis
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UMTS kasutus
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WCDMA (3G) ja WiMAX
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FDD või TDD
t
t
UL
DL
DL
Guard
period
UL
f
f
D
D
Duplex gap
f
f
D
2
f
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
CS PLMN
GSM CDMA WCDMA EDGE
CS domain
3G-324M
GW
IP Multimedia domain
PS domain
SIP
WLAN
SIP/ H.323
xDSL CATV
Wireline
SIP/ H.323
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Interoperability
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GSM areng
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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 (1)
http//www.3gpp.org/ http//www.3gpp2.org/ http//
en.wikipedia.org/wiki/WCDMA http//en.wikipedia.or
g/wiki/3G http//www.umts.de./
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Lingid (2)

• http//www.openmobilealliance.com/
• http//en.wikipedia.org/wiki/Next_Generation_Netwo
  rking
• http//en.wikipedia.org/wiki/Fixed-Mobile_Converge
  nce_Alliance
• http//en.wikipedia.org/wiki/IP_Multimedia_Subsyst
  em