Kommunikatsiooniteenuste arendus IRT0080 - PowerPoint PPT Presentation

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Kommunikatsiooniteenuste arendus IRT0080

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UE (mobiil) hendub mitme samal sagedusel t tava tugijaamaga. Vajame mitmekiirelist vastuv tjat = RAKE. 268. Spreading. Factor. Chiprate. Mchips/s. User Bitrate ... – PowerPoint PPT presentation

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Title: Kommunikatsiooniteenuste arendus IRT0080


1
Kommunikatsiooniteenuste arendusIRT0080
  • Loeng 6/2008
  • Avo Otstelekommunikatsiooni õppetool,
  • TTÜ raadio- ja sidetehnika inst.avo.ots_at_ttu.ee

2
Video vooülekanne
3
Mobiilside firmadelt algus...
4
Ühildatavus
5
GSM UMTS
6
UTRAN OSI Model
Radio Resource Control (RRC)
Layer

3
Logical channels - grouped by information
content - User Data - Control
and signaling
Layer

2
Medium Access Control (MAC)
Transport channels - grouped by method of
transport
Physical layer
Layer

1
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
7
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
8
Soft Handover
UE
  • UE (mobiil) ühendub mitme samal sagedusel töötava
    tugijaamaga
  • Vajame mitmekiirelist vastuvõtjat gt RAKE

9
Bitikiirus kasutaja tarvis
10
UMTS kasutus
11
WCDMA (3G) ja WiMAX
12
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)
13
Sagedusalad ( ... aga)
14
Hübriidlahendus
15
Industry convergence
16
IMS layered architecture
17
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
18
Interoperability
19
GSM areng
20
Juurdepääs
21
I M S
22
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

23
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

24
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./
25
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
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