Tài liệu Điện thoại di động mạng lưới Radio P6 ppt
Tài liệu Điện thoại di động mạng lưới Radio P6 ppt
... to any
mobile station and is used for sending broadcast and dummy messages.
370 6 Trunked Mobile Radio and Packet Data Radio
Licence type C Trunked radio networks for local, geographically tightly ... tightly re-
stricted areas.
Licence type D Countrywide trunked radio network for mobile data radio
applications.
Trunked radio networks are divided into two categories based on user...
Tài liệu Điện thoại di động mạng lưới Radio P3 pptx
... Subsystem
Radio Subsystem
O (see below)
Points of reference:
Interface to
Transition to
Interface
Radio Interface
other Networks
Figure 3.1: Functional architecture of the GSM mobile radio network
3.2 ... propagation of
the radio waves in its equalizer.
In the GSM frequency band, shadowing may happen to the radio signals
of mobile and base stations; this is partly compensated by t...
Tài liệu Điện thoại di động mạng lưới Radio P4 pptx
... a comparison of the technical parameters for the radio
interfaces of the digital public mobile radio systems (GSM, USDC and PDC).
4.2 The US Digital Cellular System (USDC) 305
1
7
10
11
2
3
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9
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6
Figure ... (MPT) made the decision in April
1989 to develop a digital mobile radio standard. Compared with exis...
Tài liệu Điện thoại di động mạng lưới Radio P5 ppt
... Virtual
Working
Unit
Inter
Protocols
Radio B-ISDN
Access
Transcoding
Functions
Radio Connection
Figure 5.14: Use of virtual ATM connections with UMTS-specific protocols for the
radio interface
offer a defined ... to integrate worldwide the di erent mobile communications systems
available today, such as mobile telephone and telepoint, trunked radio, data
radio, and satellite radio syst...
Tài liệu Điện thoại di động mạng lưới Radio P8 ppt
... first ever mobile radio system in which the base station
as well as the mobile terminal transmit on the same radio channel. Yet the
two transmission directions are not separated by di erent frequencies; ... Cordless Telephone Systems
and 868 MHz, which, unlike CT1, does not collide with other standardized
mobile radio services in Europe.
Two-level GFSK (Gaussian Frequency Shift Keying)...
Tài liệu Điện thoại di động mạng lưới Radio P10 pptx
... IS-95
• Digital cordless radio networks:
– DECT
– Personal Handyphone System, PHS (Japan)
– US Personal Access Communication System (PACS)
• Digital point-to-multipoint (PMP) radio relay systems
Directional ... re-
stricted area, e.g., in a radio cell defined by an internal base station. Systems
in which users enjoy the same kind of mobility as in cellular mobile radio
Mobile Radio N...
Tài liệu Điện thoại di động mạng lưới Radio P12 ppt
... ATM Radio Interface 635
Support
Mobility
Convergence
Layer
ATM
RADIO DLC
ATM
and Mobility Support
Management
Radio Resource
Application
Layer
Convergence
SAAL AAL-X
ATM
RADIO DLC
RADIO PHY RADIO ... architecture
Support
Mobility
Application
Management
Radio Resource
and Mobility Support
Wireless Access PointTerminalWireless
RADIO PHY
RADIO DLC
Layer
Convergence
Layer
Network...
Tài liệu Điện thoại di động mạng lưới Radio P15 ppt
... mobile radio networks. For example, the first NDC digit
can select the UPT service while the other digits would be responsible for the
selection of the UPT service provider.
15.8 Numbering and Dialling ... to minimize the number of
digits to be dialled.
• It must be possible to dial the UPT number from any terminal in the
PSTN. Therefore digits have already been reserved (digits 0. . . 9 and...
Tài liệu Điện thoại di động mạng lưới Radio P16 ppt
... electromagnetic radiation in the mobile radio area in order to define
meaningful limit values for acceptable radiation levels.
Because they are almost always physically separate, fixed radio facilities ... situation and to
the service to ensure that the software radio is switched to the corresponding
mode and the most favourable mobile radio service is being used.
UMTS-based PLMNs have...
Tài liệu Điện thoại di động mạng lưới Radio P1 doc
... Radio
TETRA digital
Satellite Radio
Broadband Radio
Cellular Radio
Data Packet Radio
Trunked Radio
Paging Systems
Telephony
Cordless
1974: Private
MPT 1327Mobile Radio
D-Netz digital
1998: Iridium
Figure ... digital
1992: Data Radio
Modacom
INMARSAT-C
1988:
LEO Satellite Sys.
W-ATM
2000:1997:1996:
W-LAN 802.11 HIPERLAN/1
2002: UMTS
1991: DECT
digital
1991: Trunked Radio
anal...