Tài liệu Điện thoại di động mạng lưới Radio P13 doc
Tài liệu Điện thoại di động mạng lưới Radio P13 doc
... above. Because of the restriction of the radio medium (e.g., ra-
dio range), both standards must contain functions for the management and
maintenance of the radio network that far exceed the normal ... itself. If the radio channel is Idle
for a longer period of time, the HCS provider notifies the MAC sublayer
accordingly through HC Free Indication. The CAC sublayer thereby indicates
that...
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...
Tài liệu Điện thoại di động mạng lưới Radio P2 doc
... of a medium. The following techniques are used
in radio systems:
• Frequency-division multiplexing (FDM)
• Time-division multiplexing (TDM)
• Code-division multiplexing (CDM)
• Space-division ... possible.
Many public land mobile radio systems, such as the GSM network and trunked
radio systems, use frequency-division multiplexing techniques.
2.6 Allocation of Radio Channels 63
Time
Fr...
Tài liệu Điện thoại di động mạng lưới Radio P14 doc
... antennas.
Individual dipoles act as omnidirectional beams. However, if groups of
dipoles are used, a certain directional pattern is created through the phase
di erence at the receiver, which in a distant ... Appendix B). The primary responsibility
of Intelsat is to provide regular radio services worldwide, namely telephony
and data links as well as the transmission and distribution of TV a...
Tài liệu Điện thoại di động mạng lưới Radio P3 pptx
... TC
Dialling In
Trunk Code
DDI
Direct
DDI
NDCCC SN
IP
NDC = TC + DN
Destination
Code
National
Evaluation max. 6 Digits
SA
ISDN-Sub-Address
max. 40 Digits
Subscriber Number
Nat. No. = max. 15 Digits ... protocol, called the radio
link protocol (RLP), is used, which corresponds to layer 2 of the ISO/OSI
reference model.
3.9.4.1 Characteristics of the Radio Link Protocol
The radio link p...
Tài liệu Điện thoại di động mạng lưới Radio P4 pptx
... the technical parameters for the radio
interfaces of the digital public mobile radio systems (GSM, USDC and PDC).
318 4 Other Public Mobile Radio Systems
Studies show that the user capacity in ... (MPT) made the decision in April
1989 to develop a digital mobile radio standard. Compared with existing ana-
logue systems, this digital mobile radio system was to be more cost-effective
a...
Tài liệu Điện thoại di động mạng lưới Radio P5 ppt
... to integrate worldwide the di erent mobile communications systems
available today, such as mobile telephone and telepoint, trunked radio, data
radio, and satellite radio systems, into one system.
What ... IMT 2000 327
• R1: radio interface between mobile station (MS) and base station (BS)
• R2: radio interface between personal station (PS) and personal base
station
• R3: radio inte...
Tài liệu Điện thoại di động mạng lưới Radio P6 ppt
... convolutional coder after coding.
6
Trunked Mobile Radio and Packet
Data Radio
In addition to the public radio telephone service and the paging service, there
are other radio services that are not ... In
Proceedings of 6th International Symposium on Personal and Indoors
Mobile Radio Communications, pp. 799–802, The Hague, Netherlands,
Sept. 1994.
372 6 Trunked Mobile Radio and Pac...
Tài liệu Điện thoại di động mạng lưới Radio P7 pdf
... eight di erent tone
signals per Radio Identity Code (RIC). This means that a tone receiver
with a RIC can produce eight di erent alarm signals.
• Numeric radio paging in which the receiver has a display ... caller first dials the paging number and then the suffix number
of the radio paging area in which the call is to be transmitted.
In addition to terminals and accessories for Cityruf,...
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; ... range between 864
Table 8.2: The main parameters of cordless digital telephone systems
System CT2/CAI DECT
Signal transmission Digital Digital
Frequency band [MHz] 864–868 1880–1900
No...
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