EP0644518B1 - Procédé dans un système mobile, par exemple un système de communication à faible portée - Google Patents

Procédé dans un système mobile, par exemple un système de communication à faible portée Download PDF

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Publication number
EP0644518B1
EP0644518B1 EP19940850145 EP94850145A EP0644518B1 EP 0644518 B1 EP0644518 B1 EP 0644518B1 EP 19940850145 EP19940850145 EP 19940850145 EP 94850145 A EP94850145 A EP 94850145A EP 0644518 B1 EP0644518 B1 EP 0644518B1
Authority
EP
European Patent Office
Prior art keywords
mobile
traffic
rti
information
beacon
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19940850145
Other languages
German (de)
English (en)
Other versions
EP0644518A2 (fr
EP0644518A3 (fr
Inventor
Erik Wichtel
Torbjörn Andersson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telia Co AB
Original Assignee
Telia AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telia AB filed Critical Telia AB
Publication of EP0644518A2 publication Critical patent/EP0644518A2/fr
Publication of EP0644518A3 publication Critical patent/EP0644518A3/fr
Application granted granted Critical
Publication of EP0644518B1 publication Critical patent/EP0644518B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096708—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control
    • G08G1/096716—Systems involving transmission of highway information, e.g. weather, speed limits where the received information might be used to generate an automatic action on the vehicle control where the received information does not generate an automatic action on the vehicle control
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096733—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place
    • G08G1/096758—Systems involving transmission of highway information, e.g. weather, speed limits where a selection of the information might take place where no selection takes place on the transmitted or the received information
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/09—Arrangements for giving variable traffic instructions
    • G08G1/0962—Arrangements for giving variable traffic instructions having an indicator mounted inside the vehicle, e.g. giving voice messages
    • G08G1/0967—Systems involving transmission of highway information, e.g. weather, speed limits
    • G08G1/096766—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission
    • G08G1/096783—Systems involving transmission of highway information, e.g. weather, speed limits where the system is characterised by the origin of the information transmission where the origin of the information is a roadside individual element
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/123—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams
    • G08G1/127—Traffic control systems for road vehicles indicating the position of vehicles, e.g. scheduled vehicles; Managing passenger vehicles circulating according to a fixed timetable, e.g. buses, trains, trams to a central station ; Indicators in a central station

Definitions

  • the present invention relates to a method for a mobile system, for example the RTI system which is a system for short-range communication between a vehicle and the roadside.
  • the mobile system comprises mobile units and beacons (radio beacons), by means of which information on traffic, for example vehicle traffic, can be executed in dependence on information transferred from the mobile units to the said beacons, and vice versa, when the mobile units are passing the latter.
  • beacons radio beacons
  • the RTI system for example, is based on data communication between a vehicle and the roadside.
  • the data communication requires a new infrastructure built around beacons with short range.
  • EP 172 320 913 a method for locating a mobile telephone is specified.
  • the fixed base stations transmit identity signals and precise timing pulses from their fixed locations.
  • the signal transfer occurs either as a response to an interrogation signal from the mobile or automatically at predetermined time intervals.
  • the mobile unit can utilize internally stored tables of positions of the fixed base stations when calculating its own positions.
  • the method is intended to be used for monitoring and controlling vehicle traffic. The method entails that high costs for setting up a new fixed infrastructure for traffic monitoring can be avoided.
  • European Patent Specification 242,099 describes a method for locating a vehicle, for example in the case of the theft of a car.
  • a unit in the vehicle calculates the position of the vehicle with the aid of a GPS system. This position is transmitted to a central monitoring station via a mobile telephone system if a break-in is detected or if a change in position is detected.
  • the system consists of a portable locating unit which can be used both as mobile telephone and for global positioning.
  • the unit has a receiver for receiving signals from a global positioning system (GPS) and circuits for calculating the position.
  • GPS global positioning system
  • the position thus obtained is then transmitted to the central unit via a mobile telephone system.
  • the central unit contains a capability for correlating the position obtained with a stored digital map in order to place the user at his current location on the map.
  • the invention can be used, inter alia, in RTI (Road Transport Informatics) systems which to a large extent will probably be built on data access through beacon systems, that is to say special systems for short-range access between a vehicle and the roadside.
  • RTI Radio Transport Informatics
  • the range of a beacon is 10 - 500 metres depending on the technology used. Beacon systems are not continuous and do not have a hand-over capability which thus entails patchy coverage with areas without coverage inbetween.
  • the data structure in a beacon system is adapted to the discontinuous coverage.
  • the vehicle On passing a beacon, the vehicle receives a standard set of data which describes the traffic environment of the nearest surrounding area. The vehicle reports the traffic situation on the route most recently travelled which is then used by the beacon system for updating the traffic situation. Individual transactions for a range of applications can also be carried out.
  • beacon systems cannot be developed in all parts of the country where there is need. The pace of development is limited by the will to take economic risks. Nor will customers buy the system or subscribe to it before the extent of development is good and there is adequate application access.
  • GSM offers an attractive alternative medium for area coverage when the user population is moderate.
  • the use of GSM has been investigated, inter alia, in the so-called SOKRATES project which has an information structure which is radically different from the structure of short-range communication systems.
  • SOKRATES new services must also be introduced in GSM (broadcast, or respectively a low-quality mass uplink for statistical data collection etc.).
  • standardization organizations have no plans to introduce these functions in a foreseeable time.
  • a method for communicating within the coverage area of an RTI system is suggested.
  • a mobile unit comprised in a vehicle exchanges road and traffic information with said stationary element.
  • the method comprises the step of defining an arbitrary additional position within said coverage area as having the desired property that, when any mobile unit passes said additional position, road and traffic information transfer between said mobile unit and the fixed part of the RTI system is initiated.
  • This desired property is obtained by storing a plurality of predetermined additional positions, and information on road and traffic for each of said additional positions, in a central storing unit provided in the RTI-system, and communicating by using a mobile telephony system between the central storing unit and a mobile unit when the mobile unit passes any one of the said predetermined additional positions.
  • the beacons of the mobile system are of a virtual type, by which is meant that positions which represent the said virtual beacons are specified in the system, preferably in the centrally placed elements of the system, and that an alternative medium, for example a cellular mobile telephone system which can be of a known type, cooperates in order to access data between a respective mobile unit and a respective virtual beacon.
  • a virtual type by which is meant that positions which represent the said virtual beacons are specified in the system, preferably in the centrally placed elements of the system, and that an alternative medium, for example a cellular mobile telephone system which can be of a known type, cooperates in order to access data between a respective mobile unit and a respective virtual beacon.
  • virtual beacons are placed out in the mobile system, during its development phase, in less traffic-and/or use-intensive areas of the total coverage area of the mobile system. With increased traffic or, respectively, use in the said areas, the virtual beacons are replaced by real beacons, which saves frequency in the area(s) where the replacement occurs.
  • a number of operable parallel mobile systems are included which are allocated to competitors or are complementary to one another.
  • the complementary systems can operate with a common basic database and be directed, with matching services, to interested parties, for example petrol firms which then obtain the opportunity, through the system, of marketing, for example information sections which emphasise their own product, for example a hotel, goods or petrol, and are priced free.
  • similar or the same data structures are used both for real and virtual beacons.
  • the data are stored locally in the affected beacon, which is placed at the roadside or in the vicinity of the road.
  • the data are stored centrally since the local node does not exist in reality.
  • the virtual beacon is replaced by a real beacon, the centrally stored data are transferred to the real beacon, that is to say the data are executed locally.
  • some of the services affected can utilize the characteristics of the cellular carrier system whereby it becomes possible for the virtual beacon system to utilize advantages which are associated both with the beacon-oriented system and the cellular system.
  • Virtual beacons included in the system are placed outside the areas of the system with the most traffic or greatest traffic load.
  • the position function is in control when contact is established between a respective mobile unit and respective virtual beacon which entails that a significant proportion of the RTI traffic in heavily loaded geographic areas is avoided or alternatively that designation of real beacons can take place.
  • RTI traffic can thus be directed towards base stations with less loading and a more even total loading structure be achieved in the cellular system, for example the GSM system.
  • virtual beacon systems can be tailormade for larger customers. The flexibility is considerable as compared with traditional beacon systems.
  • Virtual beacon systems can be operated, for example in Sweden, but also in networks of operators of other countries within Europe, assuming that the carrying system is GSM.
  • the invention supplements beacon-based systems with functional capabilities in areas without beacons. Functionalities which were lost by there not being any beacon coverage are replaced, and such functionalities can be position determination and data access.
  • the SOKRATES project has the aim of providing the same functionality with, for example, GSM access as does the beacon system.
  • the problem with SOKRATES is, however, that the data and application structures are in principle different from beacon systems. Separate database and application infrastructures must be built up if the system is to be put into operation. Vehicles which wish to use both beacon-based applications and SOKRATES must have double sets of processor and display units in the vehicles. This takes up space and costs money, apart from the fact that it is impractical to handle, for example, two parallel road guidance systems in one and the same vehicle.
  • SOKRATES requires new GSM functions which are not going to be introduced within the foreseeable future.
  • a coverage area of a beacon-oriented system is shown by 1.
  • the coverage area comprises a number of partial areas A, B and C where so-called virtual beacons VB have been set up.
  • the said partial areas A, B and C are areas which have least traffic loading and utilization.
  • Area D is highly loaded from the point of view of traffic and provided with real beacons RB.
  • Mobile units are moving within the areas and a first mobile unit has been specified by M1 in area D.
  • M1 On passing a real beacon, information or data relating to traffic loading in the nearest surrounding area are transferred from the real beacon to the mobile unit M1.
  • the mobile unit M1 transfers information about the driving of the mobile unit, traffic conditions etc. to the real beacon RB.
  • the majority of data received is stored locally in the totality of real beacons RB. However, there is a connection to a higher-level unit RB' which is connected to all the real beacons for certain information exchange in the system.
  • the virtual beacons VB naturally lack local anchorage in the same way as the real beacons etc. which is why all data relating to traffic intensity, loading are stored centrally, preferably in a central higher-level unit VB' which is common to all the beacons in the different partial areas. Each partial area can per se have a separate higher-level VB'.
  • the said virtual beacons VB are stored in the central unit VB' where the virtual beacons are represented through positions, the geographic positions, which they have been allocated in the different areas A, B and C.
  • Access and transmission take place at frequencies which belong to a cellular mobile telephony system which is located in the area of the beacon-oriented system.
  • the cellular system has been symbolized by 2 in the figure and can consist of a mobile telephone system known per se, preferably the GSM system.
  • the beacon-oriented system consists of the so-called RTI system.
  • the virtual beacons can be exchanged, increased in number, reduced in number or replaced with the said real beacons RB, in each case depending on a change in the traffic intensity, traffic loadings, vehicle types and so forth.
  • one or more control elements RB' and RB" can be arranged for the said real beacons.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Traffic Control Systems (AREA)

Claims (5)

  1. Procédé permettant d'effectuer une communication à l'intérieur de la zone de couverture (1) d'un système RTI, entre une unité mobile (M1, M2) comprise dans un véhicule et un élément fixe (RB) placé en une certaine position sur le côté de la route, l'unité mobile échangeant des informations concernant la route et la circulation avec l'élément fixe lorsqu'elle passe devant ladite position, le procédé comprenant l'opération consistant à définir une position supplémentaire (VB) arbitraire à l'intérieur de la zone de couverture comme ayant la propriété voulue que, lorsqu'une unité mobile (M1, M2) quelconque passe devant la position supplémentaire (VB), un transfert d'informations concernant la route et la circulation entre l'unité mobile et la partie fixe du système RTI est déclenché, cette propriété voulue étant obtenue par les opérations consistant :
    à ranger plusieurs positions supplémentaires (VB) préfixées et des informations concernant la route et la circulation pour chacune des positions supplémentaires (VB), dans une unité de mémoire centrale (VB') faisant partie du système RTI ;
    à effectuer une communication en utilisant un système de téléphonie mobile entre l'unité de mémoire centrale et une unité mobile lorsque l'unité mobile passe devant l'une quelconque des positions supplémentaires préfixées.
  2. Procédé tel que défini à la revendication 1, comprenant les opérations consistant :
    à effectuer la communication d'informations entre des unités mobiles (M1, M2) et l'unité de mémoire centrale (VB') par l'intermédiaire du système de téléphonie mobile à l'endroit de zones à circulation ou utilisation moins intense d'une zone de couverture totale du système RTI et, lorsque la circulation ou l'utilisation du système s'accroít,
    à placer un nouvel élément fixe (RB) à l'endroit de la position supplémentaire (VB) mise en mémoire de la zone à circulation ou utilisation accrue ;
    à télécharger, de l'unité de mémoire centrale (VB') jusque dans le nouvel élément fixe (RB), les informations mises en mémoire pour ladite position supplémentaire (VB) ;
    à effectuer la communication d'informations entre des mobiles et le nouvel élément fixe à l'endroit de l'emplacement du nouvel élément fixe.
  3. Procédé tel que défini dans l'une quelconque des revendications précédentes, comprenant l'opération consistant à sélectionner des positions supplémentaires qui sont couvertes par le système RTI dans des zones où l'utilisation de capacité du système de téléphonie mobile est faible.
  4. Procédé tel que défini dans l'une quelconque des revendications précédentes, comprenant l'opération consistant à utiliser des balises en tant qu'éléments fixes (RB) dans le système RTI.
  5. Procédé tel que défini dans l'une quelconque des revendications précédentes, comprenant l'opération consistant à utiliser un système de téléphonie mobile GSM pour transmettre des informations entre des unités mobiles et l'unité de mémoire centrale faisant partie du système RTI.
EP19940850145 1993-09-14 1994-08-29 Procédé dans un système mobile, par exemple un système de communication à faible portée Expired - Lifetime EP0644518B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9302983A SE9302983L (sv) 1993-09-14 1993-09-14 Anordning vid mobilsystem, t ex system för korthållskommunikation
SE9302983 1993-09-14

Publications (3)

Publication Number Publication Date
EP0644518A2 EP0644518A2 (fr) 1995-03-22
EP0644518A3 EP0644518A3 (fr) 1996-06-26
EP0644518B1 true EP0644518B1 (fr) 2002-02-06

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EP19940850145 Expired - Lifetime EP0644518B1 (fr) 1993-09-14 1994-08-29 Procédé dans un système mobile, par exemple un système de communication à faible portée

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EP (1) EP0644518B1 (fr)
DE (1) DE69429796T2 (fr)
SE (1) SE9302983L (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29505615U1 (de) * 1995-03-31 1995-11-02 Copilot Verkehrsleit Und Verke Verkehrsleitsystem für ein Verkehrswegenetz
FR2796745B1 (fr) * 1999-07-23 2002-10-18 Phf Creation Dispositif de signalisation, notamment routiere
WO2019245375A1 (fr) * 2018-06-18 2019-12-26 Ellertsen Roger Andre Système de navigation de trafic routier

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1277400C (fr) * 1986-04-09 1990-12-04 Uri Rapoport Systeme antivol et localisateur
US5155689A (en) * 1991-01-17 1992-10-13 By-Word Technologies, Inc. Vehicle locating and communicating method and apparatus
US5173710A (en) * 1991-08-15 1992-12-22 Terrapin Corporation Navigation and positioning system and method using uncoordinated beacon signals

Also Published As

Publication number Publication date
SE9302983L (sv) 1995-03-15
DE69429796D1 (de) 2002-03-21
DE69429796T2 (de) 2002-11-21
SE9302983D0 (sv) 1993-09-14
EP0644518A2 (fr) 1995-03-22
EP0644518A3 (fr) 1996-06-26

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