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...

Ngày tải lên: 15/12/2013, 06:15

... 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...

Ngày tải lên: 15/12/2013, 06:15

... Channel grid [MHz] 24.549 . . . 26.061 PMP radio relay 3.5, 7, 14 17 Radio relay for Hiperlan/4 3.41 . . . 3.60 PMP radio relay 3.5 2.5 . . . 2.67 PMP radio relay 1.88 . . . 1.9 DECT-WLL 1.7 RFP) ... 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 Networks...

Ngày tải lên: 24/12/2013, 13:17

... 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...

Ngày tải lên: 15/12/2013, 06:15

... 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...

Ngày tải lên: 15/12/2013, 06:15

... 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...

Ngày tải lên: 15/12/2013, 06:15

... 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...

Ngày tải lên: 15/12/2013, 06:15

... 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,...

Ngày tải lên: 24/12/2013, 13:17

... 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...

Ngày tải lên: 24/12/2013, 13:17

... groups of the fixed radio termination with common control. An FP can be divided into two physical subgroups: • Radio Fixed Part (RFP): responsible for only one cell in the network • Radio End Point ... logical standpoint) consists of one or more fixed radio terminations (FT) and many portable radio terminations (PT) that have been allocated to it. Fixed Radio Termination The FT is a...

Ngày tải lên: 24/12/2013, 13:17