NO169315B - car phone - Google Patents
car phone Download PDFInfo
- Publication number
- NO169315B NO169315B NO854947A NO854947A NO169315B NO 169315 B NO169315 B NO 169315B NO 854947 A NO854947 A NO 854947A NO 854947 A NO854947 A NO 854947A NO 169315 B NO169315 B NO 169315B
- Authority
- NO
- Norway
- Prior art keywords
- radio
- works
- active
- area
- areas
- Prior art date
Links
- 230000011664 signaling Effects 0.000 claims abstract description 4
- 230000005540 biological transmission Effects 0.000 claims description 19
- 230000001413 cellular effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
- H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
- H04B7/2621—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using frequency division multiple access [FDMA]
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Telephone Function (AREA)
- Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
- Dental Preparations (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
Description
Oppfinnelsen angår et biltelefonsystem med stasjonære og mobile abonnentstasjoner i et utstrakt område for et radionett som består av flere radiokonsentratorer anordnet innbyrdes fordelt i området. The invention relates to a car telephone system with stationary and mobile subscriber stations in an extended area for a radio network consisting of several radio concentrators arranged mutually distributed in the area.
Ved eldre systemer benyttes relativt lave frekvenser (VHF-området) som byr på fordelen av relativt stor rekkevidde. Slike systemer, eksempelvis kjent fra den 29. IEEE Vehicular Technology Conference, mars 1979, sidene 245-252 (spesielt fig. Older systems use relatively low frequencies (the VHF range) which offer the advantage of a relatively large range. Such systems, for example known from the 29th IEEE Vehicular Technology Conference, March 1979, pages 245-252 (especially fig.
1 med tilhørende beskrivelse på side 245), New York, USA; H.H. Callendar et al.: Network Design for fully automatic wide 1 with accompanying description on page 245), New York, USA; H.H. Callendar et al.: Network Design for fully automatic wide
area radiotelephone service", er godt egnet i landlige strøk, men tillater imidlertid bare relativt få kanaler. Således lar det seg ikke realisere noe cellulært system i dette frekvensom-råde . area radiotelephone service", is well suited in rural areas, but only allows relatively few channels. Thus, no cellular system can be realized in this frequency range.
Nyere systemer, slik de likeledes er kjent fra det ovennevnte litteratursted (sammenlign fig. 2 og tilhørende beskrivelse), benytter overføringskanaler i UHF-området. Disse byr på stor kanalkapasitet ved redusert rekkevidde, hvorfor de er godt egnet for tettbebyggede områder av mindre utstrekning. For radiodekning av landlige strøk må det på grunn av den korte rekkevidde settes opp et meget stort antall faste stasjoner. Newer systems, as they are also known from the above-mentioned literature site (compare Fig. 2 and associated description), use transmission channels in the UHF range. These offer a large channel capacity with a reduced range, which is why they are well suited for densely built-up areas of smaller extent. For radio coverage of rural areas, due to the short range, a very large number of fixed stations must be set up.
I DE-A-2 659 570 beskrives et telefonsystem med stasjonære og mobile abonnentstasjoner i det vidt utstrakte området av et radionett som består av flere i form av et cellulært system anordnede radiokonsentratorområder med overlappende radio-områder. I den forbindelse er området i med særlig høy abon-nenttetthet disse første radiokonsentratorområdene overlagret andre radiokonsentratorområder med vesentlig større områdera-dier og egne, i disse områder ennå ikke benyttede frekvenser. De andre radiokonsentratorområder er tilordnet de mobile abonnentstasjoner som er bestemt for en meldingstrafikk innenfor dette radiokonsentratorområdet. DE-A-2 659 570 describes a telephone system with stationary and mobile subscriber stations in the widely extended area of a radio network which consists of several radio concentrator areas arranged in the form of a cellular system with overlapping radio areas. In this connection, the area in these first radio concentrator areas with a particularly high subscriber density is superimposed on other radio concentrator areas with significantly larger area radii and own frequencies not yet used in these areas. The other radio concentrator areas are assigned to the mobile subscriber stations that are intended for message traffic within this radio concentrator area.
Videre er det fra EP-A-0 11164 kjent et radiosystem som utvider et offentlig telefonnett med mobile mottagere og radiotelefon-sentraler som henholdsvis er anordnet for et anropsområde. Ved hjelp av en radiotelefonsentral kan anropsoppdrag som kommer direkte eller indirekte fra et telefonnett, overføres som anropstelegrammer i et radionett og der utløse utsendelse av et radioanrop. I den forbindelse er for flere innbyrdes umiddel-bart tilstøtende overlappende sendeområder den samme sendefre-kvens, kalt landsfrekvensen, benyttet til utsendelse av radioanrop, og til avkobling av disse i overlappingsområdene has det forskjellige, syklisk repeterende tidsslisser i de enkelte sendeområder. Dertil kan det i et sendeområde sendes ut en annen, spesielt for dette sendeområde tilordnet sendefre-kvens, kalt lokalfrekvens, for utsendelse av radioanrop til slike mottagere som stadig bare befinner seg i dette sendeområdet. Til utsendelse av lokalfrekvensen i et sendeområde er det i sendeområdet flere innbyrdes synkronisert arbeidende lokalsendere og til utsendelse av landsfrekvensen er det i sendeområdene anordnet flere innbyrdes synkronisert arbeidende landssendere. Som anropsmottager er det anordnet to typer, nemlig en som fast avstemt og bare til mottagelse av en lokalfrekvens egnet enkanalmottager og en type som også eller som fast avstemt enkanalmottager utelukkende er egnet til mottagelse av landsfrekvensen. Furthermore, a radio system is known from EP-A-0 11164 which expands a public telephone network with mobile receivers and radio telephone exchanges which are respectively arranged for a call area. With the help of a radio telephone exchange, call assignments that come directly or indirectly from a telephone network can be transmitted as call telegrams in a radio network and there trigger the sending of a radio call. In this connection, for several mutually immediately adjacent overlapping transmission areas, the same transmission frequency, called the national frequency, is used for sending radio calls, and to disconnect these in the overlapping areas, there are different, cyclically repeating time slots in the individual transmission areas. In addition, in a transmission area, another transmission frequency assigned specifically for this transmission area, called a local frequency, can be sent out, for the transmission of radio calls to such receivers who are still only in this transmission area. For the transmission of the local frequency in a transmission area, there are in the transmission area several mutually synchronized working local transmitters and for the transmission of the national frequency, several mutually synchronized working national transmitters are arranged in the transmission areas. There are two types of call receivers, namely one that is fixed-tuned and only suitable for receiving a local frequency single-channel receiver and a type that is also or as a fixed-tuned single-channel receiver exclusively suitable for receiving the national frequency.
Til grunn for oppfinnelsen ligger den oppgave å gi anvisning på en løsning for et enhetlig radiosystem til dekning av et område med varierende befolkningstetthet. The invention is based on the task of providing instructions for a solution for a uniform radio system to cover an area with varying population density.
Denne oppgave blir ifølge oppfinnelsen løst med et biltelefonsystem bestående av to radiodeler i de respektive radioinnretninger, hvorav den ene er aktiv i VHF-området i tynt befolkede områder og arbeider med høy sendeeffekt og den andre er aktiv i UHF-området og arbeider med relativt lav sendeeffekt, og en styreanordning som på forhåndsbestemte kriterier overvåker begge radiodeler og ved behov bevirker en omkobling og tillike bevirker datasignaliseringen mellom radiokonsentrator og mobilstasjon. According to the invention, this task is solved with a car telephone system consisting of two radio parts in the respective radio devices, one of which is active in the VHF range in sparsely populated areas and works with high transmission power and the other is active in the UHF range and works with relatively low transmission power, and a control device which, based on predetermined criteria, monitors both radio parts and, if necessary, causes a switchover and also causes the data signaling between the radio concentrator and the mobile station.
I det følgende vil der bli gjort nærmere rede for oppfinnelsen. In what follows, the invention will be explained in more detail.
Oppfinnelsens grunntanke består i at der i biltelefonsystemet er kombinert to radiodeler. Disse radiodelers radiofrekvensom-råder ligger henholdsvis i VHF- og i UHF-båndet. Biltelefonen har imidlertid bare én styreanordning som betjener begge radioområdene såvel som datasignaliseringen mellom radiokonsentrator og mobilstasjon. The basic idea of the invention is that two radio parts are combined in the car phone system. The radio frequency ranges of these radio components are respectively in the VHF and UHF bands. However, the car phone only has one control device that serves both radio areas as well as the data signaling between the radio concentrator and the mobile station.
Radiodelen i UHF-området (f.eks. på 900 MHz) kan arbeide med relativt liten effekt (ca. 1 W) og er bestemt for byområder. Radiodelen for VHF-området (f.eks. 80 MHz eller 160 MHz) skal tjene til å dekke landlige strøk. For denne del behøves en stor sendeeffekt (ca. 15 W). Styreanordningen som overvåker begge radiodelene, belegger såvidt mulig første radiodel, dvs. kanaler i UHF-området. Biltelefonen befinner seg da i byom-rådet. Ved hjelp av denne styreanordning blir det sikret at de lavfrekvente kanaler, som der bare finnes få av, blir belagt bare når der ikke kan belegges noen høyfrekvente kanaler (UHF-området) . Biltelefonen befinner seg da i landlig område. Omkoblingen kan i den forbindelse også foretas under en samtale. The radio part in the UHF range (e.g. on 900 MHz) can work with relatively little power (approx. 1 W) and is intended for urban areas. The radio part for the VHF range (eg 80 MHz or 160 MHz) should serve to cover rural areas. For this part, a large transmission power (approx. 15 W) is needed. The control device which monitors both radio parts covers the first radio part as far as possible, i.e. channels in the UHF range. The car phone is then located in the city area. With the help of this control device, it is ensured that the low-frequency channels, of which there are only a few, are covered only when no high-frequency channels can be covered (the UHF range). The car phone is then located in a rural area. In this connection, the switchover can also be carried out during a call.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843444989 DE3444989A1 (en) | 1984-12-10 | 1984-12-10 | CAR TELEPHONE SYSTEM |
Publications (3)
Publication Number | Publication Date |
---|---|
NO854947L NO854947L (en) | 1986-06-11 |
NO169315B true NO169315B (en) | 1992-02-24 |
NO169315C NO169315C (en) | 1992-06-03 |
Family
ID=6252372
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO854947A NO169315C (en) | 1984-12-10 | 1985-12-09 | car phone |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0186004B1 (en) |
AT (1) | ATE48215T1 (en) |
DE (2) | DE3444989A1 (en) |
DK (1) | DK163161C (en) |
FI (1) | FI79214C (en) |
NO (1) | NO169315C (en) |
ZA (1) | ZA859393B (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2201866B (en) * | 1987-03-04 | 1991-04-17 | Michael Victor Rodrigues | Improvements in or relating to cellular telephone apparatus and a cellular communications system |
DE3721889A1 (en) † | 1987-07-02 | 1989-01-12 | Standard Elektrik Lorenz Ag | COMPUTER CONTROLLED SUBSCRIBER DEVICE FOR OPERATION IN TELECOMMUNICATION NETWORKS, IN PARTICULAR MOBILE RADIO NETWORKS, WITH DIFFERENT SYSTEM TECHNOLOGY |
US4989230A (en) * | 1988-09-23 | 1991-01-29 | Motorola, Inc. | Cellular cordless telephone |
DE4118992A1 (en) * | 1991-06-08 | 1992-12-10 | Aeg Mobile Communication | MOBILE PHONE ARRANGEMENT |
DE4118994A1 (en) * | 1991-06-08 | 1992-12-10 | Aeg Mobile Communication | Mobile subscriber telephone network - allows access to two different networks using card inserted in hand set reader or using cards in separate reader |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2659570C2 (en) * | 1976-12-30 | 1983-04-07 | Siemens AG, 1000 Berlin und 8000 München | Telephone and data network for fixed and mobile subscriber stations |
DE2805420A1 (en) | 1978-02-09 | 1979-08-16 | Bosch Gmbh Robert | RADIO SYSTEM FOR TRANSMISSION OF MESSAGES |
US4355411A (en) * | 1980-03-24 | 1982-10-19 | Bell Telephone Laboratories, Incorporated | Technique for efficient spectrum utilization in mobile radio systems using space diversity |
DE3321997A1 (en) * | 1982-12-03 | 1984-06-14 | ANT Nachrichtentechnik GmbH, 7150 Backnang | RADIO SYSTEM |
-
1984
- 1984-12-10 DE DE19843444989 patent/DE3444989A1/en not_active Withdrawn
-
1985
- 1985-12-06 DE DE8585115519T patent/DE3574442D1/en not_active Expired
- 1985-12-06 AT AT85115519T patent/ATE48215T1/en not_active IP Right Cessation
- 1985-12-06 EP EP85115519A patent/EP0186004B1/en not_active Expired
- 1985-12-09 FI FI854853A patent/FI79214C/en not_active IP Right Cessation
- 1985-12-09 ZA ZA859393A patent/ZA859393B/en unknown
- 1985-12-09 NO NO854947A patent/NO169315C/en unknown
- 1985-12-09 DK DK568785A patent/DK163161C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DK163161B (en) | 1992-01-27 |
EP0186004A1 (en) | 1986-07-02 |
ATE48215T1 (en) | 1989-12-15 |
NO854947L (en) | 1986-06-11 |
DK163161C (en) | 1992-06-22 |
ZA859393B (en) | 1986-08-27 |
DK568785A (en) | 1986-06-11 |
FI79214B (en) | 1989-07-31 |
FI854853A0 (en) | 1985-12-09 |
DK568785D0 (en) | 1985-12-09 |
FI79214C (en) | 1989-11-10 |
EP0186004B1 (en) | 1989-11-23 |
FI854853A (en) | 1986-06-11 |
DE3444989A1 (en) | 1986-06-12 |
DE3574442D1 (en) | 1989-12-28 |
NO169315C (en) | 1992-06-03 |
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