DK147534B - RADIO INFORMATION TRANSMISSION SYSTEM - Google Patents
RADIO INFORMATION TRANSMISSION SYSTEM Download PDFInfo
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- DK147534B DK147534B DK585477AA DK585477A DK147534B DK 147534 B DK147534 B DK 147534B DK 585477A A DK585477A A DK 585477AA DK 585477 A DK585477 A DK 585477A DK 147534 B DK147534 B DK 147534B
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- 230000005540 biological transmission Effects 0.000 title claims description 20
- 230000001413 cellular effect Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 3
- 230000008520 organization Effects 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims 1
- 230000001419 dependent effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000031968 Cadaver Diseases 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000003850 cellular structure Anatomy 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000020130 leben Nutrition 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
- H04W16/06—Hybrid resource partitioning, e.g. channel borrowing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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Description
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Opfindelsen angår et system til digital informationsoverføring for bevægelige abonnentstationer i et stort område med et radionet, der har flere radiokoncentratorer med en indbyrdes rumlig beliggenhed som i et cellularsystem med hinanden overlappende radioområder, og som har en frekvensfordelingsplan for radiokoncentratorerne, der i vidt omfang udelukker samkanalforstyrrelser i hvert radioområde incl. en udvidet randzone, og hvor den radioorganisationen vedrørende informationsudveksling mellem abonnentstationerne og radioområderne i det væsentlige foretages over centrale organisationskanaler.BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a digital information transmission system for mobile subscriber stations in a large area of a radio network having multiple radio concentrators with a spatially located intersection as in a cellular system with overlapping radio ranges and having a frequency distribution plan for the radio concentrators which largely excludes co-channel interference. in each radio range incl. an expanded peripheral zone, and where the radio organization regarding the exchange of information between the subscriber stations and the radio areas is essentially carried out over central organizational channels.
For mobile offentlige og ikke-offentlige radiotjenester eksisterer der en hel række af radionet med forskelligartet struktur. Der skelnes her mellem den offentlige bevægelige landsradio og den ikke- 2 147534 offentlige bevægelige landsradio. Den offentlige bevægelige landsradio omfatter de mobile telefonabonnenter, der over radioformidlinger kan forbindes med det offentlige telefonnets vælgeformidlinger.For mobile public and non-public radio services, a whole range of radio networks with different structure exists. Here, a distinction is made between the public mobile country radio and the non-public mobile country radio. The public mobile country radio includes the mobile telephone subscribers that can be connected via radio broadcasting to the public telephone's dialing services.
Til den ikke-offentlige bevægelige landsradios abonnentgrupper hører de offentlige sikkerhedsorganer såsom politi, brandvæsen, uheld- og katastrofebeskyttelseskorps samt tjenesteydelsesgrupper såsom taxaforetagender, transportforetagender, industriradio, forretningsradio, byggeforetagender og lignende. For en stor del af den ikke-offentlige landsradios abonnenter, der ikke er interesseret i fjerntrafik, er de lokale radiokoncentratorer tilstrækkelige til informationsoverføringen. Disse abonnentgrupper føres altså ikke over radiotelefonformidlingen, men de gennemkobles i et internt koblingsfelt. Foruden disse mobile radiotjenester findes der også radiotjenester for stationære abonnenter, der imidlertid udelukkende er begrænset til tyndt beboede områder.The non-public mobile country radio subscriber groups include the public security agencies such as the police, fire department, accident and disaster protection corps as well as service groups such as taxi companies, transport companies, industrial radio, business radio, construction companies and the like. For a large proportion of non-public land radio subscribers who are not interested in long-distance traffic, the local radio concentrators are sufficient for the transmission of information. These subscriber groups are thus not routed over the radio telephone transmission, but they are routed through an internal switching field. In addition to these mobile radio services, there are also radio services for stationary subscribers, which are, however, limited exclusively to sparsely inhabited areas.
Foruden overføring af taleinformation er også informationsoverføring i form af tekst og billeder efterspurgt. En yderligere form for radiotjenester kan bestå i udsendelsen af et opkald, f.eks. et personopkald eller et nødopkald.In addition to the transmission of speech information, information transfer in the form of text and images is also in demand. An additional form of radio service may consist in the transmission of a call, e.g. a person call or an emergency call.
De forskellige radiotjenester og de forskellige abonnentgrupper og den deraf resulterende mangfoldighed af forskellige radionet betinger en udpræget dårlig frekvensøkonomi. Også omkostningerne til det tekniske udstyr er delvis overordentlig høje, fordi radiokoncen-tratorerne skal udlægges til den forventede spidsbelastning inden for det pågældende radioområde. Den yderligere udbygning af radiotjenesterne modvirkes i den ikke-offentlige bevægelige landsradios område navnlig af den utilstrækkelige frekvensøkonomi og i den offentlige bevægelige landsradios område af de overordentlig høje investeringsomkostninger .The different radio services and the different subscriber groups and the resulting diversity of different radio networks require a markedly poor frequency economy. The cost of the technical equipment is also, in part, exceedingly high because the radio concentrators have to be placed at the expected peak load in the radio area concerned. The further expansion of radio services is offset in the area of non-public mobile terrestrial radio, in particular by the insufficient frequency economy and in the area of public mobile terrestrial radio, by the exceedingly high investment costs.
Med henblik på her at opnå en større fleksibilitet i radionet, som under anvendelse af en cellularstruktur har en væsentligt forbedret frekvensøkonomi, kan, som anvist i tysk fremlæggelsesskrift nr.In order to achieve greater flexibility in the radio network, which, using a cellular structure, has a significantly improved frequency economy, as disclosed in German publication no.
2 423 603, den radioorganisationen vedrørende informationsudveksling mellem abonnentstationerne og radioområderne i det væsentlige foretages over centrale organisationskanaler, som drives i frekvensmul-tipleks, og som har en radioområdekending. Det totale område for dette kendte system er opdelt i flere zoner, til hver af hvilke der er knyttet en fast station og en gruppe kanaler, og hvor hver kanalgruppe består af flere informationsoverføringskanaler og en udskifte- 147534 3 lig kaldesignalkanal. Over kaldesignalkanalen sker tildelingen af en ledig informationskanal i afhængighed af kaldesignalet. I tilfælde af, at alle informationskanaler i den pågældende kaldesignalka-nals kanalgruppe hørende til den faste station i en første zone er optaget, bliver der ved et yderligere kaldesignal over kaldesignalkanalen tildelt denne kanalgruppe en anden ledig kanal til informationsoverføringen. Denne kanaltildeling sker uafhængigt af de pågældende kanalers overføringskvalitet.2 423 603, the radio organization regarding the exchange of information between the subscriber stations and the radio areas is essentially made over central organizational channels operated in frequency multiplex and which has a radio area acknowledgment. The total area of this known system is divided into several zones, each of which is assigned a fixed station and a group of channels, and each channel group consists of several information transmission channels and an interchangeable call signal channel. Over the call signal channel, the allocation of a free information channel is dependent on the call signal. In the event that all information channels in that particular channel signal channel group belonging to the fixed station in a first zone are recorded, a second available channel is assigned to this channel group a second free channel for the information transmission. This channel allocation is independent of the transmission quality of the channels in question.
Til grund for opfindelsen ligger den opgave navnlig til mobile radiotjenester at angive en løsning, der gør brug af centrale organisationskanaler, og som både forbedrer sådanne systemers frekvensøkonomi yderligere og væsentligt nedsætter det tekniske opbud til radiokoncentratorerne for en forudbestemt spidstrafikbelastning.It is the object of the invention, in particular, to provide mobile radio services with a solution that uses central organizational channels, which both further improve the frequency economy of such systems and substantially reduce the technical supply to the radio concentrators for a predetermined peak traffic load.
Med udgangspunkt i et system til digital informationsoverføring af den indledningsvis omhandlede art løses denne opgave ifølge opfindelsen ved, at hver bevægelige abonnentstation ved sin aktivering ved afspørgning af mindst en central organisationskanal, i hvilken der fortløbende overføres informationer om ledige kanaler og den radioområdet vedrørende trafikbelastning, halvautomatisk eller fuldautomatisk ud fra sin egen radiotekniske situation og under hensyntagen til den radioområdet vedrørende trafikbelastning af nettet afgør, hvilket radioområde den tilknytter sig, at endvidere hver bevægelige abonnentstation, som er tilmeldt ved et radioområde, i ubelagt tilstand til stadighed overvåger antallet af de i det tilknyttede radioområde af den pågældende radiokoncentrator til rådighed stillede ledige kanaler, ved konstatering af dettes aftagen under en forudbestemt grænseværdi undersøger muligheden for et områdeskift til et andet radioområde med et denne grænseværdi overskridende antal af ledige kanaler og ved et positivt resultat fuldfører dette skift ved afmelding ved et radioområde og tilmelding ved et andet radioområde, hvis - og kun hvis - abonnentstationens egen radiotekniske situation i henseende til det andet radioområde ligeledes garanterer en tilstrækkelig god informationsoverføring.Based on a system for digital information transmission of the type initially referred to, this task according to the invention is solved by activating each moving subscriber station by interrogating at least one central organizational channel, in which information on available channels and the radio traffic congestion is continuously transmitted, semi-automatic or fully automatic, based on its own radio technical situation and taking into account the radio area concerning traffic congestion of the network, determines which radio area it associates with, in addition, each moving subscriber station registered at a radio area continuously monitors the number of the available radio range of the available radio channels available to the radio concentrator concerned, upon finding its decrease below a predetermined limit value, examines the possibility of a range change to another radio range with a limit exceeding this limit a For free channels and with a positive result, this shift completes when unsubscribed at one radio area and registration at another radio area, if - and only if - the subscriber station's own radio technical situation with respect to the other radio area also guarantees a sufficiently good information transmission.
Ved opfindelsen gås der ud fra det kendte forhold, at man ved den rumlige indbyrdes anbringelse af radiokoncentratorerne som i et cellularsystem kan nøjes med et forholdsvis ringe antal sende- og modtagefrekvenser, hvis de radiokoncentratorer, der har de samme sende- og modtagefrekvenser, har en tilstrækkelig stor afstand fra hinanden, således at samkanalforstyrrelser i en radiokoncentrators om- . 4 147534 råde er udelukket. Eksempelvis er der i Jahrbuch des elektrischen Fernmeldewesens, 21. årgang, 1970, Verlag fur Wissenschaft und Leben, Georg Heidecker, Bad Wlndsheim, sider 305-311, navnlig side 308, fig.The invention assumes that the spatial arrangement of the radio concentrators, as in a cellular system, can be satisfied with a relatively small number of transmitting and receiving frequencies if the radio concentrators having the same transmitting and receiving frequencies have a sufficiently large distance apart so that co-channel interference in a radio concentrator is about. 4 147534 advice is excluded. For example, in the Jahrbuch des elektrischen Fernmeldwesens, 21 year old, 1970, Verlag fur Wissenschaft und Leben, Georg Heidecker, Bad Wlndsheim, pages 305-311, especially pages 308, fig.
1, angivet et cellularsystem, der kan nøjes med syv frekvensgrupper, og hvor frekvensfordelingen mellem de enkelte radiokoncentratorer sker efter en såkaldt rhombekøreplan.1, a cellular system capable of satisfying seven frequency groups is indicated, in which the frequency distribution between the individual radio concentrators takes place according to a so-called rhombus plan.
Opfindelsen bygger nu på den erkendelse, at det antal sendemodtagefrekvenser, som en radiokoncentrator skal stille til rådighed, og som afhænger af den forventede spidstrafikbelastning, kan nedsættes ved, at de bevægelige abonnentstationer får den frihed, at de efter forudbestemte kriterier selv kan afgøre, ved hvilken radiokoncentrator de vil tilmelde sig, idet der forud gives et mindste antal af gunstige kanaler, der af radiokoncentratoren er tilbudt som ledige, og som er bestemt ud fra deres egen radiotekniske situation. I denne sammenhæng tilkommer der for så vidt kriteriet med den radioområdet vedrørende trafikbelastning en særlig betydning, som abonnentstationerne herved sættes i stand til at forebygge truende overbelastninger af en radiokoncentrator og dermed dens blokering til formidling af yderligere kanaler ved at undvige til naboradiokoncen-tratorer. Virkningsmæssigt kan denne funktion af de bevægelige abonnentstationer beskrives som et trafikbelastningsafhængigt åndedræt af radioområderne. Hvis et radioområdes trafikbelastning tiltager til spidsbelastningen, trækker det sig så at sige saimien, medens naboradioområderne strækker sig ind i dets udvidede randzone. Den omvendte proces finder sted, hvis trafikbelastningen i et radioområde aftager til lavere værdier, og de ledige kanaler behøves til aflastning af naboradioområder. Eksempelvis overvåger hver bevægelige abonnentstation den radioområdet vedrørende trafikbelastning af nettet ved konstatering af antallet af ledige kanaler i det abonnentstationen tilknyttede henholdsvis tilknyttelige radioområde.The invention is now based on the recognition that the number of broadcast frequencies that a radio concentrator must make available, and which depends on the expected peak traffic load, can be reduced by allowing the mobile subscriber stations the freedom to decide, according to predetermined criteria, by which radio concentrator they want to sign up with, given the minimum number of favorable channels offered by the radio concentrator as available and determined based on their own radio technical situation. In this context, the criterion of the radio traffic congestion area is of particular importance, which enables the subscriber stations to prevent threatening congestion of a radio concentrator and thus its blocking for the transmission of additional channels by avoiding neighboring radio concentrators. Effectively, this function of the mobile subscriber stations can be described as a traffic load-dependent breath of the radio areas. If the traffic load of a radio area increases to the peak load, so to speak, the Saami extends, while the neighboring radio areas extend into its extended peripheral zone. The reverse process takes place if the traffic load in a radio area decreases to lower values and the available channels are needed to relieve neighboring radio areas. For example, each mobile subscriber station monitors the radio area regarding traffic congestion of the network by ascertaining the number of available channels in the subscriber station associated and associated radio area respectively.
Hensigtsmæssigt består den i den centrale organisationskanal overførte trafikinformation blot af en angivelse af, om radiokoncen-tratorens belastning ligger under eller over en forudbestemt kritisk tærskel.Conveniently, the traffic information transmitted in the central organizational channel merely consists of an indication of whether the radio concentrator's load is below or above a predetermined critical threshold.
I en videreudvikling ifølge opfindelsen sker informationsoverføringen digitalt, fortrinsvis i binær frekvensmodulation. Binære signaler lader sig som bekendt overordentlig godt regenerere, således at den for en upåklagelig modtagelse af et sådant binært signal nødvendige signal/støjafstand kan formindskes til mindre end 10 dB.In a further development according to the invention, the information transmission takes place digitally, preferably in binary frequency modulation. As is well known, binary signals can be very well regenerated, so that the signal / noise spacing required for impeccable reception of such a binary signal can be reduced to less than 10 dB.
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Dette indebærer en uddybning af den udvidede randzone for et radioområde og dermed en forøgelse af de hinanden overlappende områder af naboradioområder, i hvilke en bevægelig abonnentstation kan vælge mellem to og flere radioområder med henblik på udførelse af en informationsoverføring. Overføringen af informationssignalerne på digital form har også den store fordel, at informationerne på enkel, sikker og økonomisk måde kan beskyttes mod ubeføjet aflytning ved digital kodning.This involves deepening the extended edge zone of a radio area and thus increasing the overlapping areas of neighboring radio areas in which a mobile subscriber station can choose between two and more radio areas for the purpose of performing an information transfer. The transmission of the information signals in digital form also has the great advantage that the information can be protected in a simple, secure and economical manner against unauthorized interception by digital coding.
Desuden byder den digitale overføring på den overordentlig store fordel, som ligger i en standardisering af et sådant radionet for de mest forskelligartede radiotjenester, nemlig ved at overføringen af forskellige informationer såsom tale, tekst, stillestående billeder, personopkald, nødopkald osv. udføres med en standardiseret bithastighed over standardiserede radioapparater.In addition, digital transmission offers the enormous advantage of standardizing such a radio network for the most diverse radio services, namely by transmitting various information such as speech, text, still images, person calls, emergency calls, etc. with a standardized bit rate over standardized radios.
Hensigtsmæssigt andrager den standardiserede bithastighed ca.Conveniently, the standardized bit rate is approx.
5 kbit/s, efter hvilken forholdsvis .bredbåndede informationer såsom tale tilpasses før deres egentlige overføring ved anvendelse af redundansformindskende metoder.5 kbit / s, after which relatively broadband information such as speech is adapted before their actual transmission using redundancy mitigation methods.
Den store fleksibilitet for et ifølge opfindelsen arbejdende radionet med hensyn til variationer af den radionettet vedrørende trafikbelastning gør det muligt at udlægge ra-diokoncentratorerne til en middeltrafikbelastning med hensyn til deres sender/modtager-radioudstyr, hvorved der ikke blot spares frekvenser, men også opnås en betydelig reduktion af det tekniske opbud.The great flexibility of a radio network operating according to the invention with respect to variations of the radio network regarding traffic load enables the radio concentrators to be placed at a medium traffic load with respect to their transmitter / receiver radio equipment, thereby not only saving frequencies but also obtaining a significant reduction in technical supply.
Opfindelsen er i det følgende forklaret nærmere under henvisning til tegningen, hvor fig. 1 viser en skematisk fremstilling af et som et cellularsystem opbygget radionet, fig. 2 en skematisk fremstilling af virkemåden af det i fig. 1 viste cellularsystem, og fig. 3 forløbet af radiofeltstyrken som funktion af afstanden i et radionet ifølge figurerne 1 og 2.The invention is explained in more detail below with reference to the drawing, in which fig. 1 is a schematic representation of a radio network constructed as a cellular system; FIG. 2 is a schematic representation of the operation of the embodiment shown in FIG. 1, and FIG. 3 shows the course of the radio field strength as a function of the distance in a radio network according to figures 1 and 2.
Pig. 1 viser grundskemaet for et udvidelsesdygtigt mobilt radionet, hvor radiokoncentratorerne rumligt er anbragt som i et cellularsystem. Middelradius for et radioområde, der i fig. 1 er betegnet med R, andrager ca. 15 km. Radionettet arbejder eksempelvis med frekvensduplex i UHF-området ved ca. 450 MHz. Sendebånd og modtagebånd har en for en fuldstændig elektromagnetisk forenelighed nød- 147534 6 vendig frekvensafstand på ca. 10 MHz. Sende- og modtagebånd er organiseret på standardiseret måde med hensyn til deres frekvenstilknytning.Pig. 1 shows the basic diagram of an extensible mobile radio network, where the radio concentrators are spatially arranged as in a cellular system. Mean radius of a radio range shown in FIG. 1 is denoted by R; 15 km. For example, the radio network operates with frequency duplex in the UHF area at approx. 450 MHz. Transmission bands and receiving bands have a frequency range of approx. About 100 electromagnetic compatibility. 10 MHz. The transmit and receive bands are organized in a standardized manner with respect to their frequency association.
Som det fremgår af fig. 1, er radionettet opdelt i frekvenstilknytningsområder, der hver for sig har syv radiokoncentratorer med cifrene 1-7. I fig. 1 er tre forskelligt skraverede frekvenstilknytningsområder fremhævet. De med 1 betegnede radiokoncentratorer er i forhold til de øvrige radiokoncentratorer forsynet med et kryds, som skal antyde, at disse radiokoncentratorer er udvidet til radioformidlingspladser for forbindelsen til det offentlige telefonnets vælgeformidlingspladser. Frekvenstilknytningsområderne med deres syv radiokoncentratorer er alle opbygget ens, og de har den samme frekvensfordelingsplan. Radiokoncentratorernes numre 1-7 betegner samtidigt radioområdenumrene.As shown in FIG. 1, the radio network is divided into frequency connection areas, each having seven radio concentrators with the digits 1-7. In FIG. 1, three distinctly shaded frequency association regions are highlighted. Compared to the other radio concentrators, the radio concentrators referred to in 1 are provided with an intersection, which should indicate that these radio concentrators have been extended to radio communication sites for connection to the public telephone's choice communication sites. The frequency linking areas with their seven radio concentrators are all built up the same and they have the same frequency distribution plan. The radio concentrator numbers 1-7 simultaneously denote the radio area numbers.
Med henblik på at det kan garanteres, at de mobile abonnenter kan nås uden afbrydelser, har radioområderne for radiokoncentrato-rerne 1-7 en gensidig overlapning. Også i overlapningsområdet skal der så vidt muligt ikke optræde nogen samkanalforstyrrelser eller forstyrrelser hidrørende fra flerdobbelt brug af en og samme kanal.In order to ensure that the mobile subscribers can be reached without interruption, the radio ranges of the radio concentrators 1-7 have a mutual overlap. Also, in the overlap area, no co-channel interference or interference resulting from multiple use of a single channel shall occur as far as possible.
Samkanalforstyrrelser fra fjernere beliggende radiokoncentratorer er under hensyntagen til en af modulationsarten afhængig mind-stekanalstøjafstand mulig på modtagestedet for en mobil abonnentstation. Dette forhold må frekvensfordelingsplanen inden for et frekvenstilknytningsområde tilgodese under hensyntagen til det overordnede rumordningsskema for de op til hinanden grænsende frekvenstilknytningsområder .Co-channel interference from distant radio concentrators is possible, taking into account a minimum channel channel distance dependent on the modulation type at the receiving location of a mobile subscriber station. This relationship must take into account the frequency distribution plan within a frequency range, taking into account the overall spatial scheme for the adjacent frequency range regions.
Frekvenstilknytningen til de enkelte radiokoncentratorer er foretaget således, at radiokoncentratorer med de samme områdenumre, og som arbejder med de samme radiofrekvenser, i udførelseseksemplet har en indbyrdes mindsteafstand på ca. 80 km, således at samkanalforstyrrelser mellem umiddelbart ved siden af hinanden beliggende radioområder ikke kan optræde. Hvis eksempelvis sendebåndet subsidiært modtagebåndet er opdelt i 120 kanalgrupper med hver syv radiokanaler, tilknyttes der hensigtsmæssigt hvert radioområde en kanal pr. kanalgruppe, hvorhos beliggenheden af en til et bestemt radioområde hørende kanal indenfor kanalgruppen forbliver den samme. Således er eksempelvis den første kanal i en kanalgruppe tilknyttet radioområdet 1, den anden kanal er tilknyttet radioområdet 6, den tredje kanal er tilknyttet radioområdet 4 osv. Ved en sådan ind 147534 7 retning opnås det, at de i hvert radioområde benyttede radiokanaler altid har en indbyrdes frekvensafstand på seks kanaler, således at hvert radioområdes kanaler ligger så langt fra hinanden, at naboka-nalforstyrrelser fra områdets egne sendere med sikkerhed undgås.The frequency association with the individual radio concentrators is made so that radio concentrators with the same area numbers and which operate with the same radio frequencies in the embodiment have a minimum spacing of approx. 80 km, so that inter-channel interference between immediately adjacent radio areas cannot occur. For example, if the transmitting band alternatively the receiving band is divided into 120 channel groups with every seven radio channels, each radio area is suitably assigned one channel per channel. channel group, where the location of a channel belonging to a particular radio area within the channel group remains the same. Thus, for example, the first channel in a channel group is associated with the radio region 1, the second channel is associated with the radio region 6, the third channel is associated with the radio region 4, etc. In such a direction it is obtained that the radio channels used in each radio area always have a six channel spacing, so that the channels of each radio area are so far apart that neighboring channel interference from the area's own transmitters is safely avoided.
Fig. 3 viser en optegnelse af dæmpningen af det med 0 dBm angivne sendeniveau som funktion af afstanden i kilometer for radioområderne FBI, FB2 og FB5 i et frekvenstilknytningsområde og radioområdet FBI i et nabofrekvenstilknytningsområde. Af forenklingsårsager er der i fig. 3 givet afkald på at angive det i virkeligheden optrædende spredningsområde for disse dæmpningsforløb.FIG. 3 shows a record of the attenuation of the transmit level indicated by 0 dBm as a function of the distance in kilometers for the radio areas FBI, FB2 and FB5 in a frequency band and the radio area FBI in a neighbor frequency band. For simplification reasons, FIG. 3 given the actual range of dispersion occurring for these attenuation events.
Den halve middelafstand mellem to umiddelbart ved siden af hinanden beliggende radioområder i et frekvenstilknytningsområde er angivet med R' og andrager henført til fig. 1 ved en radius R på 15 km ca. 13,5 km. Denne forskel tilgodeser den indbyrdes overlapning mellem de op til hinanden grænsende radioområder. Svarende til frekvensfordelingsplanen arbejder radioområderne FBI, henført. til en radiokanal/med frekvensen fl og radioområderne FB2 og FB5, ligeledes henført til en radiokanal,med frekvenserne f2 og f5. Samkanalforstyrrelsesafstanden ved overgangsstedet fra radioområdet FBI til radioområdet FB2 i afstanden R' andrager ca.The half-average distance between two adjacent radio ranges in a frequency association region is indicated by R 'and amounts to FIG. 1 at a radius R of 15 km approx. 13.5 km. This difference takes into account the overlap between the adjacent radio areas. Similar to the frequency distribution plan, the radio areas FBI works, attributed. to a radio channel / with frequency f1 and the radio ranges FB2 and FB5, also assigned to a radio channel, with frequencies f2 and f5. The co-channel disturbance distance at the transition point from radio area FBI to radio area FB2 at distance R 'is approx.
35 dB. Den for digital overføring kritiske støjafstand på 6 dB nås først ved ca. 32 km. Disse værdier gælder for det mellemeuropæiske område med en middelterrænujævnhed på 50 m højdeforskel og en for radiokoncentratorerne antaget antennehøjde på 75 m.35 dB. The 6 dB critical noise distance for digital transmission is only reached at approx. 32 km. These values apply to the Central European area with a mean terrain uniformity of 50 m height difference and an antenna height of 75 m assumed for the radio concentrators.
Under forudsætning af en digital informationsoverføring kan en radiokoncentrator praktisk taget udstrække sin radioområdegrænse langt ind i de umiddelbart tilgrænsende radioområder, hvis dette med henblik på hjælp til naboen skulle være nødvendigt for et naboradioområde, og hvis den på grundlag af sin egen trafikbelastnings situation er i stand dertil. Med andre ord kan man på denne måde imødegå umiddelbart over abonnentstationerne truende overbelastninger af et radioområde på overordentlig fordelagtig måde, således at radiokon-centratorerne også under hensyntagen til kortvarigt optrædende spidsbelastninger kan udlægges for en middelstor trafikbelastning.Assuming a digital information transfer, a radio concentrator can practically extend its radio range boundary far into the immediately adjacent radio ranges if this is necessary for a neighboring radio area for assistance to the neighbor and if it is able to withstand its own traffic congestion situation thereto. In other words, in this way one can counteract immediately overloading overloads of a radio area in an extremely advantageous way, so that the radio concentrators can also be subjected to a medium traffic congestion, taking into account short-term peak loads.
Under henvisning til fig. 2, som gengiver et udsnit af to frekvenstilknytningsområder i det i fig. 1 viste radionet, skal denne nabohjælpsfunktion mellem op til hinanden grænsende radioområder forklares nærmere. I den venstre del af tegningen vises inden for radioområdet 1 i det yderste randområde en mobil trafikabonnent 8 147534Referring to FIG. 2, which shows a section of two frequency connection regions in the embodiment of FIG. 1, this neighboring function between adjacent radio areas must be explained in more detail. In the left part of the drawing, a mobile traffic subscriber 8 147534
Ti. Den har på et tidligere tidspunkt på grundlag af sin lokale situation tilmeldt sig ved radioområdet l's radiokoncentrator, men den er efter dette tidspunkt i ubelagt tilstand. I denne tilstand påkalder den fortløbende radiokoncentratorens centrale organisationskanal, i hvilken den bl.a. får meddelt en information om antallet af de ved radiokoncentratoren til rådighed stående ledige kanaler. Abonnentstationen TI konstaterer på et bestemt tidspunkt, at radiokoncentratorens trafikbelastning overskrider en kritisk tærskelværdi og på denne måde til abonnentstationen signalerer faren for en overbelastning. Abonnentstationen Ti undersøger derpå automatisk, om der for den ud fra dens radiotekniske situation består en brugbar forbindelse til et af naboradioområderne 3 og 4, hvilket sker under hensyntagen til trafikbelastningen af et af disse radioområder. Hvis denne undersøgelse giver et positivt resultat, afmelder abonnentstationen Ti sig hos radioområdet l's radiokoncentrator, og den tilmelder sig ved et passende naboradioområde 3 eller 4. Det betyder, at radioområdet l's radiokoncentrator ved en truende overbelastning på sin vis trækker sig sammen til delområdet A, idet det øvrige ringformede område A' med henblik på nabohjælp overtages af naboradioområderne for de i dette område værende mobile abonnentstationer. I fig. 2 er dette antydet ved hjælp af pile, der fra radioområderne 2-7 peger i retning mod radioområdet 1.Ten. It has previously subscribed to the radio concentrator of the radio area 1 on the basis of its local situation, but after that time it is in uncoated condition. In this state, the consecutive radio concentrator invokes the central organizational channel of the radio. will be informed of the number of available channels available at the radio concentrator. The subscriber station TI finds at a certain time that the traffic congestion of the radio concentrator exceeds a critical threshold and in this way signals to the subscriber station the danger of an overload. Subscriber station Ten then automatically checks whether, for its radio-technical situation, there is a usable connection to one of the neighboring radio areas 3 and 4, which takes into account the traffic load of one of these radio areas. If this study yields a positive result, subscriber station Ti signs off at radio range 1's radio concentrator and it subscribes to a suitable neighboring radio area 3 or 4. This means that radio area 1's radio concentrator, in a threatening congestion, eventually contractes to sub region A, the other annular region A 'for neighboring assistance being taken over by the neighboring radio areas of the mobile subscriber stations in this area. In FIG. 2, this is indicated by arrows pointing from the radio areas 2-7 in the direction towards the radio area 1.
For radioområdet til højre i fig. 2 er vist det modsatte tilfælde. Den i radioområdet 2 værende abonnentstation T2 melder sig som følge af en af dette områdes radiokoncentrator indikeret truende overbelastning til hos radioområdet 1, som råder over et tilstrækkeligt antal ledige kanaler, og som derudover for abonnentstationen T2 ud fra dennes radiotekniske situation kan erkendes som egnet til en forbindelse. Her udstrækker radioområdet 1 på sin vis sit indflydelsesområde ringformet udefter i en udvidet randzone B, der medomfatter abonnentstationen T2 i radioområdet 2.For the radio area to the right in fig. 2 is shown the opposite case. The subscriber station T2 in the radio area 2 is reported as a threatening congestion indicated by one of this area's radio concentrator at the radio area 1, which has a sufficient number of available channels, and which in addition to the subscriber station T2 can be recognized as suitable for the radio station a connection. Here, the radio area 1, in its sense, extends its area of influence in the outer ring in an expanded peripheral zone B, which includes the subscriber station T2 in the radio area 2.
Claims (3)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2659569 | 1976-12-30 | ||
| DE2659569A DE2659569C2 (en) | 1976-12-30 | 1976-12-30 | Method and arrangement for transmitting information by radio |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DK585477A DK585477A (en) | 1978-07-01 |
| DK147534B true DK147534B (en) | 1984-09-17 |
| DK147534C DK147534C (en) | 1985-02-25 |
Family
ID=5997047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK585477A DK147534C (en) | 1976-12-30 | 1977-12-29 | RADIO INFORMATION TRANSMISSION SYSTEM |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5828975B2 (en) |
| AT (1) | AT365025B (en) |
| BE (1) | BE862543A (en) |
| CH (1) | CH625091A5 (en) |
| DE (1) | DE2659569C2 (en) |
| DK (1) | DK147534C (en) |
| FR (1) | FR2376571A1 (en) |
| GB (1) | GB1562963A (en) |
| IT (1) | IT1089196B (en) |
| NL (1) | NL176824C (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5553930A (en) * | 1978-10-16 | 1980-04-19 | Nippon Telegr & Teleph Corp <Ntt> | Radio zone allotment method |
| DE3049011A1 (en) * | 1980-12-24 | 1982-07-08 | TE KA DE Felten & Guilleaume Fernmeldeanlagen GmbH, 8500 Nürnberg | Cell structure for radio network - has small central cells divided in six isosceles triangles, as identical sectors, with transmit and receive aerials at specified points |
| DE3200965A1 (en) * | 1982-01-14 | 1983-07-21 | Siemens AG, 1000 Berlin und 8000 München | NEARBY RADIO CELL ORGANIZATION CHANNEL REFERENCE SYSTEM |
| DE3337648A1 (en) * | 1983-10-17 | 1987-02-26 | Licentia Gmbh | Radio network with a multiplicity of mobile stations |
| FR2556532B1 (en) * | 1983-12-09 | 1986-10-24 | Trt Telecom Radio Electr | METHOD FOR TWO-WAY RADIOCOMMUNICATION BETWEEN FIXED STATIONS AND MOBILE STATIONS |
| JPS60143037A (en) * | 1983-12-29 | 1985-07-29 | Nippon Telegr & Teleph Corp <Ntt> | Mobile radio communication system |
| GB2173377A (en) * | 1985-03-29 | 1986-10-08 | Int Standard Electric Corp | Alternate cell routing for cellular mobile radio |
| SE455250B (en) * | 1985-09-13 | 1988-06-27 | Comvik Ab | CELLULATED MOBILE PHONE SYSTEM INCLUDING BASE STATIONS WITH A LOCAL SWITCH WITH CALLING FUNCTION |
| DE3539698C2 (en) * | 1985-11-08 | 1994-11-24 | Siemens Ag | Radio system for transmitting information for fixed and mobile subscriber stations |
| JPH0685592B2 (en) * | 1986-02-24 | 1994-10-26 | 八重洲無線株式会社 | Wireless channel traffic data transmission system |
| DE3827352C2 (en) * | 1988-08-12 | 1996-03-07 | Bosch Gmbh Robert | Method for determining the current location of a mobile radio station |
| US5212806A (en) * | 1990-10-29 | 1993-05-18 | International Business Machines Corporation | Distributed control methods for management of migrating data stations in a wireless communications network |
| FI91344C (en) * | 1991-03-05 | 1994-06-10 | Nokia Telecommunications Oy | Cellular radio network, base station and method for regionally adjusting traffic capacity in a cellular radio network |
| US5241685A (en) * | 1991-03-15 | 1993-08-31 | Telefonaktiebolaget L M Ericsson | Load sharing control for a mobile cellular radio system |
| US5410733A (en) * | 1993-02-11 | 1995-04-25 | Nokia Mobile Phones Ltd. | Received signal strength information measurement useful in a mobile telephone system having mobile assisted handoff capability |
| GB2297457B (en) * | 1995-01-19 | 1999-04-14 | Motorola Israel Ltd | Radio system and method of control for efficient site load distribution |
| DE69638236D1 (en) * | 1995-09-20 | 2010-09-23 | Nippon Telegraph & Telephone | Access method, mobile station and base station for CDMA mobile communication system |
| GB2314732A (en) * | 1996-06-27 | 1998-01-07 | Motorola Ltd | Congestion relief for cellular radio communication systems |
| EP1116402A1 (en) * | 1998-09-22 | 2001-07-18 | Telefonaktiebolaget Lm Ericsson | Cell load sharing in a mobile-controlled cell selection environment |
| JP3946059B2 (en) * | 2002-03-06 | 2007-07-18 | 株式会社エヌ・ティ・ティ・ドコモ | Mobile station, communication system and communication method |
-
1976
- 1976-12-30 DE DE2659569A patent/DE2659569C2/en not_active Expired
-
1977
- 1977-12-05 CH CH1481077A patent/CH625091A5/en not_active IP Right Cessation
- 1977-12-19 FR FR7738246A patent/FR2376571A1/en active Granted
- 1977-12-22 IT IT31083/77A patent/IT1089196B/en active
- 1977-12-27 JP JP52158653A patent/JPS5828975B2/en not_active Expired
- 1977-12-29 AT AT0939077A patent/AT365025B/en not_active IP Right Cessation
- 1977-12-29 DK DK585477A patent/DK147534C/en not_active IP Right Cessation
- 1977-12-29 NL NLAANVRAGE7714547,A patent/NL176824C/en not_active IP Right Cessation
- 1977-12-29 GB GB54065/77A patent/GB1562963A/en not_active Expired
- 1977-12-30 BE BE184026A patent/BE862543A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DK585477A (en) | 1978-07-01 |
| IT1089196B (en) | 1985-06-18 |
| DE2659569B1 (en) | 1978-05-11 |
| ATA939077A (en) | 1981-04-15 |
| JPS5384604A (en) | 1978-07-26 |
| BE862543A (en) | 1978-06-30 |
| DK147534C (en) | 1985-02-25 |
| GB1562963A (en) | 1980-03-19 |
| NL176824B (en) | 1985-01-02 |
| DE2659569C2 (en) | 1979-01-04 |
| CH625091A5 (en) | 1981-08-31 |
| FR2376571A1 (en) | 1978-07-28 |
| FR2376571B1 (en) | 1980-08-22 |
| NL7714547A (en) | 1978-07-04 |
| AT365025B (en) | 1981-12-10 |
| NL176824C (en) | 1985-06-03 |
| JPS5828975B2 (en) | 1983-06-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |